| /* ELF executable support for BFD. |
| Copyright 1993, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* |
| |
| SECTION |
| ELF backends |
| |
| BFD support for ELF formats is being worked on. |
| Currently, the best supported back ends are for sparc and i386 |
| (running svr4 or Solaris 2). |
| |
| Documentation of the internals of the support code still needs |
| to be written. The code is changing quickly enough that we |
| haven't bothered yet. |
| */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #define ARCH_SIZE 0 |
| #include "elf-bfd.h" |
| |
| static INLINE struct elf_segment_map *make_mapping |
| PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean)); |
| static boolean map_sections_to_segments PARAMS ((bfd *)); |
| static int elf_sort_sections PARAMS ((const PTR, const PTR)); |
| static boolean assign_file_positions_for_segments PARAMS ((bfd *)); |
| static boolean assign_file_positions_except_relocs PARAMS ((bfd *)); |
| static boolean prep_headers PARAMS ((bfd *)); |
| static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **, int)); |
| static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *)); |
| static char *elf_read PARAMS ((bfd *, long, unsigned int)); |
| static void elf_fake_sections PARAMS ((bfd *, asection *, PTR)); |
| static boolean assign_section_numbers PARAMS ((bfd *)); |
| static INLINE int sym_is_global PARAMS ((bfd *, asymbol *)); |
| static boolean elf_map_symbols PARAMS ((bfd *)); |
| static bfd_size_type get_program_header_size PARAMS ((bfd *)); |
| static boolean elfcore_read_notes PARAMS ((bfd *, bfd_vma, bfd_vma)); |
| |
| /* Swap version information in and out. The version information is |
| currently size independent. If that ever changes, this code will |
| need to move into elfcode.h. */ |
| |
| /* Swap in a Verdef structure. */ |
| |
| void |
| _bfd_elf_swap_verdef_in (abfd, src, dst) |
| bfd *abfd; |
| const Elf_External_Verdef *src; |
| Elf_Internal_Verdef *dst; |
| { |
| dst->vd_version = bfd_h_get_16 (abfd, src->vd_version); |
| dst->vd_flags = bfd_h_get_16 (abfd, src->vd_flags); |
| dst->vd_ndx = bfd_h_get_16 (abfd, src->vd_ndx); |
| dst->vd_cnt = bfd_h_get_16 (abfd, src->vd_cnt); |
| dst->vd_hash = bfd_h_get_32 (abfd, src->vd_hash); |
| dst->vd_aux = bfd_h_get_32 (abfd, src->vd_aux); |
| dst->vd_next = bfd_h_get_32 (abfd, src->vd_next); |
| } |
| |
| /* Swap out a Verdef structure. */ |
| |
| void |
| _bfd_elf_swap_verdef_out (abfd, src, dst) |
| bfd *abfd; |
| const Elf_Internal_Verdef *src; |
| Elf_External_Verdef *dst; |
| { |
| bfd_h_put_16 (abfd, src->vd_version, dst->vd_version); |
| bfd_h_put_16 (abfd, src->vd_flags, dst->vd_flags); |
| bfd_h_put_16 (abfd, src->vd_ndx, dst->vd_ndx); |
| bfd_h_put_16 (abfd, src->vd_cnt, dst->vd_cnt); |
| bfd_h_put_32 (abfd, src->vd_hash, dst->vd_hash); |
| bfd_h_put_32 (abfd, src->vd_aux, dst->vd_aux); |
| bfd_h_put_32 (abfd, src->vd_next, dst->vd_next); |
| } |
| |
| /* Swap in a Verdaux structure. */ |
| |
| void |
| _bfd_elf_swap_verdaux_in (abfd, src, dst) |
| bfd *abfd; |
| const Elf_External_Verdaux *src; |
| Elf_Internal_Verdaux *dst; |
| { |
| dst->vda_name = bfd_h_get_32 (abfd, src->vda_name); |
| dst->vda_next = bfd_h_get_32 (abfd, src->vda_next); |
| } |
| |
| /* Swap out a Verdaux structure. */ |
| |
| void |
| _bfd_elf_swap_verdaux_out (abfd, src, dst) |
| bfd *abfd; |
| const Elf_Internal_Verdaux *src; |
| Elf_External_Verdaux *dst; |
| { |
| bfd_h_put_32 (abfd, src->vda_name, dst->vda_name); |
| bfd_h_put_32 (abfd, src->vda_next, dst->vda_next); |
| } |
| |
| /* Swap in a Verneed structure. */ |
| |
| void |
| _bfd_elf_swap_verneed_in (abfd, src, dst) |
| bfd *abfd; |
| const Elf_External_Verneed *src; |
| Elf_Internal_Verneed *dst; |
| { |
| dst->vn_version = bfd_h_get_16 (abfd, src->vn_version); |
| dst->vn_cnt = bfd_h_get_16 (abfd, src->vn_cnt); |
| dst->vn_file = bfd_h_get_32 (abfd, src->vn_file); |
| dst->vn_aux = bfd_h_get_32 (abfd, src->vn_aux); |
| dst->vn_next = bfd_h_get_32 (abfd, src->vn_next); |
| } |
| |
| /* Swap out a Verneed structure. */ |
| |
| void |
| _bfd_elf_swap_verneed_out (abfd, src, dst) |
| bfd *abfd; |
| const Elf_Internal_Verneed *src; |
| Elf_External_Verneed *dst; |
| { |
| bfd_h_put_16 (abfd, src->vn_version, dst->vn_version); |
| bfd_h_put_16 (abfd, src->vn_cnt, dst->vn_cnt); |
| bfd_h_put_32 (abfd, src->vn_file, dst->vn_file); |
| bfd_h_put_32 (abfd, src->vn_aux, dst->vn_aux); |
| bfd_h_put_32 (abfd, src->vn_next, dst->vn_next); |
| } |
| |
| /* Swap in a Vernaux structure. */ |
| |
| void |
| _bfd_elf_swap_vernaux_in (abfd, src, dst) |
| bfd *abfd; |
| const Elf_External_Vernaux *src; |
| Elf_Internal_Vernaux *dst; |
| { |
| dst->vna_hash = bfd_h_get_32 (abfd, src->vna_hash); |
| dst->vna_flags = bfd_h_get_16 (abfd, src->vna_flags); |
| dst->vna_other = bfd_h_get_16 (abfd, src->vna_other); |
| dst->vna_name = bfd_h_get_32 (abfd, src->vna_name); |
| dst->vna_next = bfd_h_get_32 (abfd, src->vna_next); |
| } |
| |
| /* Swap out a Vernaux structure. */ |
| |
| void |
| _bfd_elf_swap_vernaux_out (abfd, src, dst) |
| bfd *abfd; |
| const Elf_Internal_Vernaux *src; |
| Elf_External_Vernaux *dst; |
| { |
| bfd_h_put_32 (abfd, src->vna_hash, dst->vna_hash); |
| bfd_h_put_16 (abfd, src->vna_flags, dst->vna_flags); |
| bfd_h_put_16 (abfd, src->vna_other, dst->vna_other); |
| bfd_h_put_32 (abfd, src->vna_name, dst->vna_name); |
| bfd_h_put_32 (abfd, src->vna_next, dst->vna_next); |
| } |
| |
| /* Swap in a Versym structure. */ |
| |
| void |
| _bfd_elf_swap_versym_in (abfd, src, dst) |
| bfd *abfd; |
| const Elf_External_Versym *src; |
| Elf_Internal_Versym *dst; |
| { |
| dst->vs_vers = bfd_h_get_16 (abfd, src->vs_vers); |
| } |
| |
| /* Swap out a Versym structure. */ |
| |
| void |
| _bfd_elf_swap_versym_out (abfd, src, dst) |
| bfd *abfd; |
| const Elf_Internal_Versym *src; |
| Elf_External_Versym *dst; |
| { |
| bfd_h_put_16 (abfd, src->vs_vers, dst->vs_vers); |
| } |
| |
| /* Standard ELF hash function. Do not change this function; you will |
| cause invalid hash tables to be generated. */ |
| |
| unsigned long |
| bfd_elf_hash (namearg) |
| const char *namearg; |
| { |
| const unsigned char *name = (const unsigned char *) namearg; |
| unsigned long h = 0; |
| unsigned long g; |
| int ch; |
| |
| while ((ch = *name++) != '\0') |
| { |
| h = (h << 4) + ch; |
| if ((g = (h & 0xf0000000)) != 0) |
| { |
| h ^= g >> 24; |
| /* The ELF ABI says `h &= ~g', but this is equivalent in |
| this case and on some machines one insn instead of two. */ |
| h ^= g; |
| } |
| } |
| return h; |
| } |
| |
| /* Read a specified number of bytes at a specified offset in an ELF |
| file, into a newly allocated buffer, and return a pointer to the |
| buffer. */ |
| |
| static char * |
| elf_read (abfd, offset, size) |
| bfd * abfd; |
| long offset; |
| unsigned int size; |
| { |
| char *buf; |
| |
| if ((buf = bfd_alloc (abfd, size)) == NULL) |
| return NULL; |
| if (bfd_seek (abfd, offset, SEEK_SET) == -1) |
| return NULL; |
| if (bfd_read ((PTR) buf, size, 1, abfd) != size) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_file_truncated); |
| return NULL; |
| } |
| return buf; |
| } |
| |
| boolean |
| bfd_elf_mkobject (abfd) |
| bfd * abfd; |
| { |
| /* this just does initialization */ |
| /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */ |
| elf_tdata (abfd) = (struct elf_obj_tdata *) |
| bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); |
| if (elf_tdata (abfd) == 0) |
| return false; |
| /* since everything is done at close time, do we need any |
| initialization? */ |
| |
| return true; |
| } |
| |
| boolean |
| bfd_elf_mkcorefile (abfd) |
| bfd * abfd; |
| { |
| /* I think this can be done just like an object file. */ |
| return bfd_elf_mkobject (abfd); |
| } |
| |
| char * |
| bfd_elf_get_str_section (abfd, shindex) |
| bfd * abfd; |
| unsigned int shindex; |
| { |
| Elf_Internal_Shdr **i_shdrp; |
| char *shstrtab = NULL; |
| unsigned int offset; |
| unsigned int shstrtabsize; |
| |
| i_shdrp = elf_elfsections (abfd); |
| if (i_shdrp == 0 || i_shdrp[shindex] == 0) |
| return 0; |
| |
| shstrtab = (char *) i_shdrp[shindex]->contents; |
| if (shstrtab == NULL) |
| { |
| /* No cached one, attempt to read, and cache what we read. */ |
| offset = i_shdrp[shindex]->sh_offset; |
| shstrtabsize = i_shdrp[shindex]->sh_size; |
| shstrtab = elf_read (abfd, offset, shstrtabsize); |
| i_shdrp[shindex]->contents = (PTR) shstrtab; |
| } |
| return shstrtab; |
| } |
| |
| char * |
| bfd_elf_string_from_elf_section (abfd, shindex, strindex) |
| bfd * abfd; |
| unsigned int shindex; |
| unsigned int strindex; |
| { |
| Elf_Internal_Shdr *hdr; |
| |
| if (strindex == 0) |
| return ""; |
| |
| hdr = elf_elfsections (abfd)[shindex]; |
| |
| if (hdr->contents == NULL |
| && bfd_elf_get_str_section (abfd, shindex) == NULL) |
| return NULL; |
| |
| if (strindex >= hdr->sh_size) |
| { |
| (*_bfd_error_handler) |
| (_("%s: invalid string offset %u >= %lu for section `%s'"), |
| bfd_get_filename (abfd), strindex, (unsigned long) hdr->sh_size, |
| ((shindex == elf_elfheader(abfd)->e_shstrndx |
| && strindex == hdr->sh_name) |
| ? ".shstrtab" |
| : elf_string_from_elf_strtab (abfd, hdr->sh_name))); |
| return ""; |
| } |
| |
| return ((char *) hdr->contents) + strindex; |
| } |
| |
| /* Make a BFD section from an ELF section. We store a pointer to the |
| BFD section in the bfd_section field of the header. */ |
| |
| boolean |
| _bfd_elf_make_section_from_shdr (abfd, hdr, name) |
| bfd *abfd; |
| Elf_Internal_Shdr *hdr; |
| const char *name; |
| { |
| asection *newsect; |
| flagword flags; |
| |
| if (hdr->bfd_section != NULL) |
| { |
| BFD_ASSERT (strcmp (name, |
| bfd_get_section_name (abfd, hdr->bfd_section)) == 0); |
| return true; |
| } |
| |
| newsect = bfd_make_section_anyway (abfd, name); |
| if (newsect == NULL) |
| return false; |
| |
| newsect->filepos = hdr->sh_offset; |
| |
| if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr) |
| || ! bfd_set_section_size (abfd, newsect, hdr->sh_size) |
| || ! bfd_set_section_alignment (abfd, newsect, |
| bfd_log2 (hdr->sh_addralign))) |
| return false; |
| |
| flags = SEC_NO_FLAGS; |
| if (hdr->sh_type != SHT_NOBITS) |
| flags |= SEC_HAS_CONTENTS; |
| if ((hdr->sh_flags & SHF_ALLOC) != 0) |
| { |
| flags |= SEC_ALLOC; |
| if (hdr->sh_type != SHT_NOBITS) |
| flags |= SEC_LOAD; |
| } |
| if ((hdr->sh_flags & SHF_WRITE) == 0) |
| flags |= SEC_READONLY; |
| if ((hdr->sh_flags & SHF_EXECINSTR) != 0) |
| flags |= SEC_CODE; |
| else if ((flags & SEC_LOAD) != 0) |
| flags |= SEC_DATA; |
| |
| /* The debugging sections appear to be recognized only by name, not |
| any sort of flag. */ |
| if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 |
| || strncmp (name, ".line", sizeof ".line" - 1) == 0 |
| || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) |
| flags |= SEC_DEBUGGING; |
| |
| /* As a GNU extension, if the name begins with .gnu.linkonce, we |
| only link a single copy of the section. This is used to support |
| g++. g++ will emit each template expansion in its own section. |
| The symbols will be defined as weak, so that multiple definitions |
| are permitted. The GNU linker extension is to actually discard |
| all but one of the sections. */ |
| if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0) |
| flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; |
| |
| if (! bfd_set_section_flags (abfd, newsect, flags)) |
| return false; |
| |
| if ((flags & SEC_ALLOC) != 0) |
| { |
| Elf_Internal_Phdr *phdr; |
| unsigned int i; |
| |
| /* Look through the phdrs to see if we need to adjust the lma. |
| If all the p_paddr fields are zero, we ignore them, since |
| some ELF linkers produce such output. */ |
| phdr = elf_tdata (abfd)->phdr; |
| for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) |
| { |
| if (phdr->p_paddr != 0) |
| break; |
| } |
| if (i < elf_elfheader (abfd)->e_phnum) |
| { |
| phdr = elf_tdata (abfd)->phdr; |
| for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) |
| { |
| if (phdr->p_type == PT_LOAD |
| && phdr->p_vaddr != phdr->p_paddr |
| && phdr->p_vaddr <= hdr->sh_addr |
| && (phdr->p_vaddr + phdr->p_memsz |
| >= hdr->sh_addr + hdr->sh_size) |
| && ((flags & SEC_LOAD) == 0 |
| || (phdr->p_offset <= (bfd_vma) hdr->sh_offset |
| && (phdr->p_offset + phdr->p_filesz |
| >= hdr->sh_offset + hdr->sh_size)))) |
| { |
| newsect->lma += phdr->p_paddr - phdr->p_vaddr; |
| break; |
| } |
| } |
| } |
| } |
| |
| hdr->bfd_section = newsect; |
| elf_section_data (newsect)->this_hdr = *hdr; |
| |
| return true; |
| } |
| |
| /* |
| INTERNAL_FUNCTION |
| bfd_elf_find_section |
| |
| SYNOPSIS |
| struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name); |
| |
| DESCRIPTION |
| Helper functions for GDB to locate the string tables. |
| Since BFD hides string tables from callers, GDB needs to use an |
| internal hook to find them. Sun's .stabstr, in particular, |
| isn't even pointed to by the .stab section, so ordinary |
| mechanisms wouldn't work to find it, even if we had some. |
| */ |
| |
| struct elf_internal_shdr * |
| bfd_elf_find_section (abfd, name) |
| bfd * abfd; |
| char *name; |
| { |
| Elf_Internal_Shdr **i_shdrp; |
| char *shstrtab; |
| unsigned int max; |
| unsigned int i; |
| |
| i_shdrp = elf_elfsections (abfd); |
| if (i_shdrp != NULL) |
| { |
| shstrtab = bfd_elf_get_str_section |
| (abfd, elf_elfheader (abfd)->e_shstrndx); |
| if (shstrtab != NULL) |
| { |
| max = elf_elfheader (abfd)->e_shnum; |
| for (i = 1; i < max; i++) |
| if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name)) |
| return i_shdrp[i]; |
| } |
| } |
| return 0; |
| } |
| |
| const char *const bfd_elf_section_type_names[] = { |
| "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB", |
| "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE", |
| "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM", |
| }; |
| |
| /* ELF relocs are against symbols. If we are producing relocateable |
| output, and the reloc is against an external symbol, and nothing |
| has given us any additional addend, the resulting reloc will also |
| be against the same symbol. In such a case, we don't want to |
| change anything about the way the reloc is handled, since it will |
| all be done at final link time. Rather than put special case code |
| into bfd_perform_relocation, all the reloc types use this howto |
| function. It just short circuits the reloc if producing |
| relocateable output against an external symbol. */ |
| |
| /*ARGSUSED*/ |
| bfd_reloc_status_type |
| bfd_elf_generic_reloc (abfd, |
| reloc_entry, |
| symbol, |
| data, |
| input_section, |
| output_bfd, |
| error_message) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data ATTRIBUTE_UNUSED; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message ATTRIBUTE_UNUSED; |
| { |
| if (output_bfd != (bfd *) NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (! reloc_entry->howto->partial_inplace |
| || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| return bfd_reloc_continue; |
| } |
| |
| /* Print out the program headers. */ |
| |
| boolean |
| _bfd_elf_print_private_bfd_data (abfd, farg) |
| bfd *abfd; |
| PTR farg; |
| { |
| FILE *f = (FILE *) farg; |
| Elf_Internal_Phdr *p; |
| asection *s; |
| bfd_byte *dynbuf = NULL; |
| |
| p = elf_tdata (abfd)->phdr; |
| if (p != NULL) |
| { |
| unsigned int i, c; |
| |
| fprintf (f, _("\nProgram Header:\n")); |
| c = elf_elfheader (abfd)->e_phnum; |
| for (i = 0; i < c; i++, p++) |
| { |
| const char *s; |
| char buf[20]; |
| |
| switch (p->p_type) |
| { |
| case PT_NULL: s = "NULL"; break; |
| case PT_LOAD: s = "LOAD"; break; |
| case PT_DYNAMIC: s = "DYNAMIC"; break; |
| case PT_INTERP: s = "INTERP"; break; |
| case PT_NOTE: s = "NOTE"; break; |
| case PT_SHLIB: s = "SHLIB"; break; |
| case PT_PHDR: s = "PHDR"; break; |
| default: sprintf (buf, "0x%lx", p->p_type); s = buf; break; |
| } |
| fprintf (f, "%8s off 0x", s); |
| fprintf_vma (f, p->p_offset); |
| fprintf (f, " vaddr 0x"); |
| fprintf_vma (f, p->p_vaddr); |
| fprintf (f, " paddr 0x"); |
| fprintf_vma (f, p->p_paddr); |
| fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align)); |
| fprintf (f, " filesz 0x"); |
| fprintf_vma (f, p->p_filesz); |
| fprintf (f, " memsz 0x"); |
| fprintf_vma (f, p->p_memsz); |
| fprintf (f, " flags %c%c%c", |
| (p->p_flags & PF_R) != 0 ? 'r' : '-', |
| (p->p_flags & PF_W) != 0 ? 'w' : '-', |
| (p->p_flags & PF_X) != 0 ? 'x' : '-'); |
| if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0) |
| fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X)); |
| fprintf (f, "\n"); |
| } |
| } |
| |
| s = bfd_get_section_by_name (abfd, ".dynamic"); |
| if (s != NULL) |
| { |
| int elfsec; |
| unsigned long link; |
| bfd_byte *extdyn, *extdynend; |
| size_t extdynsize; |
| void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); |
| |
| fprintf (f, _("\nDynamic Section:\n")); |
| |
| dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size); |
| if (dynbuf == NULL) |
| goto error_return; |
| if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0, |
| s->_raw_size)) |
| goto error_return; |
| |
| elfsec = _bfd_elf_section_from_bfd_section (abfd, s); |
| if (elfsec == -1) |
| goto error_return; |
| link = elf_elfsections (abfd)[elfsec]->sh_link; |
| |
| extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
| swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; |
| |
| extdyn = dynbuf; |
| extdynend = extdyn + s->_raw_size; |
| for (; extdyn < extdynend; extdyn += extdynsize) |
| { |
| Elf_Internal_Dyn dyn; |
| const char *name; |
| char ab[20]; |
| boolean stringp; |
| |
| (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn); |
| |
| if (dyn.d_tag == DT_NULL) |
| break; |
| |
| stringp = false; |
| switch (dyn.d_tag) |
| { |
| default: |
| sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag); |
| name = ab; |
| break; |
| |
| case DT_NEEDED: name = "NEEDED"; stringp = true; break; |
| case DT_PLTRELSZ: name = "PLTRELSZ"; break; |
| case DT_PLTGOT: name = "PLTGOT"; break; |
| case DT_HASH: name = "HASH"; break; |
| case DT_STRTAB: name = "STRTAB"; break; |
| case DT_SYMTAB: name = "SYMTAB"; break; |
| case DT_RELA: name = "RELA"; break; |
| case DT_RELASZ: name = "RELASZ"; break; |
| case DT_RELAENT: name = "RELAENT"; break; |
| case DT_STRSZ: name = "STRSZ"; break; |
| case DT_SYMENT: name = "SYMENT"; break; |
| case DT_INIT: name = "INIT"; break; |
| case DT_FINI: name = "FINI"; break; |
| case DT_SONAME: name = "SONAME"; stringp = true; break; |
| case DT_RPATH: name = "RPATH"; stringp = true; break; |
| case DT_SYMBOLIC: name = "SYMBOLIC"; break; |
| case DT_REL: name = "REL"; break; |
| case DT_RELSZ: name = "RELSZ"; break; |
| case DT_RELENT: name = "RELENT"; break; |
| case DT_PLTREL: name = "PLTREL"; break; |
| case DT_DEBUG: name = "DEBUG"; break; |
| case DT_TEXTREL: name = "TEXTREL"; break; |
| case DT_JMPREL: name = "JMPREL"; break; |
| case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break; |
| case DT_FILTER: name = "FILTER"; stringp = true; break; |
| case DT_VERSYM: name = "VERSYM"; break; |
| case DT_VERDEF: name = "VERDEF"; break; |
| case DT_VERDEFNUM: name = "VERDEFNUM"; break; |
| case DT_VERNEED: name = "VERNEED"; break; |
| case DT_VERNEEDNUM: name = "VERNEEDNUM"; break; |
| } |
| |
| fprintf (f, " %-11s ", name); |
| if (! stringp) |
| fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val); |
| else |
| { |
| const char *string; |
| |
| string = bfd_elf_string_from_elf_section (abfd, link, |
| dyn.d_un.d_val); |
| if (string == NULL) |
| goto error_return; |
| fprintf (f, "%s", string); |
| } |
| fprintf (f, "\n"); |
| } |
| |
| free (dynbuf); |
| dynbuf = NULL; |
| } |
| |
| if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL) |
| || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL)) |
| { |
| if (! _bfd_elf_slurp_version_tables (abfd)) |
| return false; |
| } |
| |
| if (elf_dynverdef (abfd) != 0) |
| { |
| Elf_Internal_Verdef *t; |
| |
| fprintf (f, _("\nVersion definitions:\n")); |
| for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef) |
| { |
| fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx, |
| t->vd_flags, t->vd_hash, t->vd_nodename); |
| if (t->vd_auxptr->vda_nextptr != NULL) |
| { |
| Elf_Internal_Verdaux *a; |
| |
| fprintf (f, "\t"); |
| for (a = t->vd_auxptr->vda_nextptr; |
| a != NULL; |
| a = a->vda_nextptr) |
| fprintf (f, "%s ", a->vda_nodename); |
| fprintf (f, "\n"); |
| } |
| } |
| } |
| |
| if (elf_dynverref (abfd) != 0) |
| { |
| Elf_Internal_Verneed *t; |
| |
| fprintf (f, _("\nVersion References:\n")); |
| for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref) |
| { |
| Elf_Internal_Vernaux *a; |
| |
| fprintf (f, _(" required from %s:\n"), t->vn_filename); |
| for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
| fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash, |
| a->vna_flags, a->vna_other, a->vna_nodename); |
| } |
| } |
| |
| return true; |
| |
| error_return: |
| if (dynbuf != NULL) |
| free (dynbuf); |
| return false; |
| } |
| |
| /* Display ELF-specific fields of a symbol. */ |
| |
| void |
| bfd_elf_print_symbol (abfd, filep, symbol, how) |
| bfd *abfd; |
| PTR filep; |
| asymbol *symbol; |
| bfd_print_symbol_type how; |
| { |
| FILE *file = (FILE *) filep; |
| switch (how) |
| { |
| case bfd_print_symbol_name: |
| fprintf (file, "%s", symbol->name); |
| break; |
| case bfd_print_symbol_more: |
| fprintf (file, "elf "); |
| fprintf_vma (file, symbol->value); |
| fprintf (file, " %lx", (long) symbol->flags); |
| break; |
| case bfd_print_symbol_all: |
| { |
| CONST char *section_name; |
| CONST char *name = NULL; |
| struct elf_backend_data *bed; |
| unsigned char st_other; |
| |
| section_name = symbol->section ? symbol->section->name : "(*none*)"; |
| |
| bed = get_elf_backend_data (abfd); |
| if (bed->elf_backend_print_symbol_all) |
| name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol); |
| |
| if (name == NULL) |
| { |
| name = symbol->name; |
| bfd_print_symbol_vandf ((PTR) file, symbol); |
| } |
| |
| fprintf (file, " %s\t", section_name); |
| /* Print the "other" value for a symbol. For common symbols, |
| we've already printed the size; now print the alignment. |
| For other symbols, we have no specified alignment, and |
| we've printed the address; now print the size. */ |
| fprintf_vma (file, |
| (bfd_is_com_section (symbol->section) |
| ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value |
| : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size)); |
| |
| /* If we have version information, print it. */ |
| if (elf_tdata (abfd)->dynversym_section != 0 |
| && (elf_tdata (abfd)->dynverdef_section != 0 |
| || elf_tdata (abfd)->dynverref_section != 0)) |
| { |
| unsigned int vernum; |
| const char *version_string; |
| |
| vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION; |
| |
| if (vernum == 0) |
| version_string = ""; |
| else if (vernum == 1) |
| version_string = "Base"; |
| else if (vernum <= elf_tdata (abfd)->cverdefs) |
| version_string = |
| elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; |
| else |
| { |
| Elf_Internal_Verneed *t; |
| |
| version_string = ""; |
| for (t = elf_tdata (abfd)->verref; |
| t != NULL; |
| t = t->vn_nextref) |
| { |
| Elf_Internal_Vernaux *a; |
| |
| for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
| { |
| if (a->vna_other == vernum) |
| { |
| version_string = a->vna_nodename; |
| break; |
| } |
| } |
| } |
| } |
| |
| if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0) |
| fprintf (file, " %-11s", version_string); |
| else |
| { |
| int i; |
| |
| fprintf (file, " (%s)", version_string); |
| for (i = 10 - strlen (version_string); i > 0; --i) |
| putc (' ', file); |
| } |
| } |
| |
| /* If the st_other field is not zero, print it. */ |
| st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other; |
| |
| switch (st_other) |
| { |
| case 0: break; |
| case STV_INTERNAL: fprintf (file, " .internal"); break; |
| case STV_HIDDEN: fprintf (file, " .hidden"); break; |
| case STV_PROTECTED: fprintf (file, " .protected"); break; |
| default: |
| /* Some other non-defined flags are also present, so print |
| everything hex. */ |
| fprintf (file, " 0x%02x", (unsigned int) st_other); |
| } |
| |
| fprintf (file, " %s", name); |
| } |
| break; |
| } |
| } |
| |
| /* Create an entry in an ELF linker hash table. */ |
| |
| struct bfd_hash_entry * |
| _bfd_elf_link_hash_newfunc (entry, table, string) |
| struct bfd_hash_entry *entry; |
| struct bfd_hash_table *table; |
| const char *string; |
| { |
| struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; |
| |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (ret == (struct elf_link_hash_entry *) NULL) |
| ret = ((struct elf_link_hash_entry *) |
| bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry))); |
| if (ret == (struct elf_link_hash_entry *) NULL) |
| return (struct bfd_hash_entry *) ret; |
| |
| /* Call the allocation method of the superclass. */ |
| ret = ((struct elf_link_hash_entry *) |
| _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| table, string)); |
| if (ret != (struct elf_link_hash_entry *) NULL) |
| { |
| /* Set local fields. */ |
| ret->indx = -1; |
| ret->size = 0; |
| ret->dynindx = -1; |
| ret->dynstr_index = 0; |
| ret->weakdef = NULL; |
| ret->got.offset = (bfd_vma) -1; |
| ret->plt.offset = (bfd_vma) -1; |
| ret->linker_section_pointer = (elf_linker_section_pointers_t *)0; |
| ret->verinfo.verdef = NULL; |
| ret->vtable_entries_used = NULL; |
| ret->vtable_entries_size = 0; |
| ret->vtable_parent = NULL; |
| ret->type = STT_NOTYPE; |
| ret->other = 0; |
| /* Assume that we have been called by a non-ELF symbol reader. |
| This flag is then reset by the code which reads an ELF input |
| file. This ensures that a symbol created by a non-ELF symbol |
| reader will have the flag set correctly. */ |
| ret->elf_link_hash_flags = ELF_LINK_NON_ELF; |
| } |
| |
| return (struct bfd_hash_entry *) ret; |
| } |
| |
| /* Initialize an ELF linker hash table. */ |
| |
| boolean |
| _bfd_elf_link_hash_table_init (table, abfd, newfunc) |
| struct elf_link_hash_table *table; |
| bfd *abfd; |
| struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, |
| struct bfd_hash_table *, |
| const char *)); |
| { |
| table->dynamic_sections_created = false; |
| table->dynobj = NULL; |
| /* The first dynamic symbol is a dummy. */ |
| table->dynsymcount = 1; |
| table->dynstr = NULL; |
| table->bucketcount = 0; |
| table->needed = NULL; |
| table->hgot = NULL; |
| table->stab_info = NULL; |
| return _bfd_link_hash_table_init (&table->root, abfd, newfunc); |
| } |
| |
| /* Create an ELF linker hash table. */ |
| |
| struct bfd_link_hash_table * |
| _bfd_elf_link_hash_table_create (abfd) |
| bfd *abfd; |
| { |
| struct elf_link_hash_table *ret; |
| |
| ret = ((struct elf_link_hash_table *) |
| bfd_alloc (abfd, sizeof (struct elf_link_hash_table))); |
| if (ret == (struct elf_link_hash_table *) NULL) |
| return NULL; |
| |
| if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc)) |
| { |
| bfd_release (abfd, ret); |
| return NULL; |
| } |
| |
| return &ret->root; |
| } |
| |
| /* This is a hook for the ELF emulation code in the generic linker to |
| tell the backend linker what file name to use for the DT_NEEDED |
| entry for a dynamic object. The generic linker passes name as an |
| empty string to indicate that no DT_NEEDED entry should be made. */ |
| |
| void |
| bfd_elf_set_dt_needed_name (abfd, name) |
| bfd *abfd; |
| const char *name; |
| { |
| if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
| && bfd_get_format (abfd) == bfd_object) |
| elf_dt_name (abfd) = name; |
| } |
| |
| /* Get the list of DT_NEEDED entries for a link. This is a hook for |
| the linker ELF emulation code. */ |
| |
| struct bfd_link_needed_list * |
| bfd_elf_get_needed_list (abfd, info) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| if (info->hash->creator->flavour != bfd_target_elf_flavour) |
| return NULL; |
| return elf_hash_table (info)->needed; |
| } |
| |
| /* Get the name actually used for a dynamic object for a link. This |
| is the SONAME entry if there is one. Otherwise, it is the string |
| passed to bfd_elf_set_dt_needed_name, or it is the filename. */ |
| |
| const char * |
| bfd_elf_get_dt_soname (abfd) |
| bfd *abfd; |
| { |
| if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
| && bfd_get_format (abfd) == bfd_object) |
| return elf_dt_name (abfd); |
| return NULL; |
| } |
| |
| /* Get the list of DT_NEEDED entries from a BFD. This is a hook for |
| the ELF linker emulation code. */ |
| |
| boolean |
| bfd_elf_get_bfd_needed_list (abfd, pneeded) |
| bfd *abfd; |
| struct bfd_link_needed_list **pneeded; |
| { |
| asection *s; |
| bfd_byte *dynbuf = NULL; |
| int elfsec; |
| unsigned long link; |
| bfd_byte *extdyn, *extdynend; |
| size_t extdynsize; |
| void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); |
| |
| *pneeded = NULL; |
| |
| if (bfd_get_flavour (abfd) != bfd_target_elf_flavour |
| || bfd_get_format (abfd) != bfd_object) |
| return true; |
| |
| s = bfd_get_section_by_name (abfd, ".dynamic"); |
| if (s == NULL || s->_raw_size == 0) |
| return true; |
| |
| dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size); |
| if (dynbuf == NULL) |
| goto error_return; |
| |
| if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0, |
| s->_raw_size)) |
| goto error_return; |
| |
| elfsec = _bfd_elf_section_from_bfd_section (abfd, s); |
| if (elfsec == -1) |
| goto error_return; |
| |
| link = elf_elfsections (abfd)[elfsec]->sh_link; |
| |
| extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
| swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; |
| |
| extdyn = dynbuf; |
| extdynend = extdyn + s->_raw_size; |
| for (; extdyn < extdynend; extdyn += extdynsize) |
| { |
| Elf_Internal_Dyn dyn; |
| |
| (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn); |
| |
| if (dyn.d_tag == DT_NULL) |
| break; |
| |
| if (dyn.d_tag == DT_NEEDED) |
| { |
| const char *string; |
| struct bfd_link_needed_list *l; |
| |
| string = bfd_elf_string_from_elf_section (abfd, link, |
| dyn.d_un.d_val); |
| if (string == NULL) |
| goto error_return; |
| |
| l = (struct bfd_link_needed_list *) bfd_alloc (abfd, sizeof *l); |
| if (l == NULL) |
| goto error_return; |
| |
| l->by = abfd; |
| l->name = string; |
| l->next = *pneeded; |
| *pneeded = l; |
| } |
| } |
| |
| free (dynbuf); |
| |
| return true; |
| |
| error_return: |
| if (dynbuf != NULL) |
| free (dynbuf); |
| return false; |
| } |
| |
| /* Allocate an ELF string table--force the first byte to be zero. */ |
| |
| struct bfd_strtab_hash * |
| _bfd_elf_stringtab_init () |
| { |
| struct bfd_strtab_hash *ret; |
| |
| ret = _bfd_stringtab_init (); |
| if (ret != NULL) |
| { |
| bfd_size_type loc; |
| |
| loc = _bfd_stringtab_add (ret, "", true, false); |
| BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1); |
| if (loc == (bfd_size_type) -1) |
| { |
| _bfd_stringtab_free (ret); |
| ret = NULL; |
| } |
| } |
| return ret; |
| } |
| |
| /* ELF .o/exec file reading */ |
| |
| /* Create a new bfd section from an ELF section header. */ |
| |
| boolean |
| bfd_section_from_shdr (abfd, shindex) |
| bfd *abfd; |
| unsigned int shindex; |
| { |
| Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
| Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| char *name; |
| |
| name = elf_string_from_elf_strtab (abfd, hdr->sh_name); |
| |
| switch (hdr->sh_type) |
| { |
| case SHT_NULL: |
| /* Inactive section. Throw it away. */ |
| return true; |
| |
| case SHT_PROGBITS: /* Normal section with contents. */ |
| case SHT_DYNAMIC: /* Dynamic linking information. */ |
| case SHT_NOBITS: /* .bss section. */ |
| case SHT_HASH: /* .hash section. */ |
| case SHT_NOTE: /* .note section. */ |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| |
| case SHT_SYMTAB: /* A symbol table */ |
| if (elf_onesymtab (abfd) == shindex) |
| return true; |
| |
| BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); |
| BFD_ASSERT (elf_onesymtab (abfd) == 0); |
| elf_onesymtab (abfd) = shindex; |
| elf_tdata (abfd)->symtab_hdr = *hdr; |
| elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr; |
| abfd->flags |= HAS_SYMS; |
| |
| /* Sometimes a shared object will map in the symbol table. If |
| SHF_ALLOC is set, and this is a shared object, then we also |
| treat this section as a BFD section. We can not base the |
| decision purely on SHF_ALLOC, because that flag is sometimes |
| set in a relocateable object file, which would confuse the |
| linker. */ |
| if ((hdr->sh_flags & SHF_ALLOC) != 0 |
| && (abfd->flags & DYNAMIC) != 0 |
| && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| return false; |
| |
| return true; |
| |
| case SHT_DYNSYM: /* A dynamic symbol table */ |
| if (elf_dynsymtab (abfd) == shindex) |
| return true; |
| |
| BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); |
| BFD_ASSERT (elf_dynsymtab (abfd) == 0); |
| elf_dynsymtab (abfd) = shindex; |
| elf_tdata (abfd)->dynsymtab_hdr = *hdr; |
| elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr; |
| abfd->flags |= HAS_SYMS; |
| |
| /* Besides being a symbol table, we also treat this as a regular |
| section, so that objcopy can handle it. */ |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| |
| case SHT_STRTAB: /* A string table */ |
| if (hdr->bfd_section != NULL) |
| return true; |
| if (ehdr->e_shstrndx == shindex) |
| { |
| elf_tdata (abfd)->shstrtab_hdr = *hdr; |
| elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; |
| return true; |
| } |
| { |
| unsigned int i; |
| |
| for (i = 1; i < ehdr->e_shnum; i++) |
| { |
| Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; |
| if (hdr2->sh_link == shindex) |
| { |
| if (! bfd_section_from_shdr (abfd, i)) |
| return false; |
| if (elf_onesymtab (abfd) == i) |
| { |
| elf_tdata (abfd)->strtab_hdr = *hdr; |
| elf_elfsections (abfd)[shindex] = |
| &elf_tdata (abfd)->strtab_hdr; |
| return true; |
| } |
| if (elf_dynsymtab (abfd) == i) |
| { |
| elf_tdata (abfd)->dynstrtab_hdr = *hdr; |
| elf_elfsections (abfd)[shindex] = hdr = |
| &elf_tdata (abfd)->dynstrtab_hdr; |
| /* We also treat this as a regular section, so |
| that objcopy can handle it. */ |
| break; |
| } |
| #if 0 /* Not handling other string tables specially right now. */ |
| hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ |
| /* We have a strtab for some random other section. */ |
| newsect = (asection *) hdr2->bfd_section; |
| if (!newsect) |
| break; |
| hdr->bfd_section = newsect; |
| hdr2 = &elf_section_data (newsect)->str_hdr; |
| *hdr2 = *hdr; |
| elf_elfsections (abfd)[shindex] = hdr2; |
| #endif |
| } |
| } |
| } |
| |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| |
| case SHT_REL: |
| case SHT_RELA: |
| /* *These* do a lot of work -- but build no sections! */ |
| { |
| asection *target_sect; |
| Elf_Internal_Shdr *hdr2; |
| |
| /* Check for a bogus link to avoid crashing. */ |
| if (hdr->sh_link >= ehdr->e_shnum) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: invalid link %lu for reloc section %s (index %u)"), |
| bfd_get_filename (abfd), hdr->sh_link, name, shindex)); |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| } |
| |
| /* For some incomprehensible reason Oracle distributes |
| libraries for Solaris in which some of the objects have |
| bogus sh_link fields. It would be nice if we could just |
| reject them, but, unfortunately, some people need to use |
| them. We scan through the section headers; if we find only |
| one suitable symbol table, we clobber the sh_link to point |
| to it. I hope this doesn't break anything. */ |
| if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB |
| && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM) |
| { |
| int scan; |
| int found; |
| |
| found = 0; |
| for (scan = 1; scan < ehdr->e_shnum; scan++) |
| { |
| if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB |
| || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM) |
| { |
| if (found != 0) |
| { |
| found = 0; |
| break; |
| } |
| found = scan; |
| } |
| } |
| if (found != 0) |
| hdr->sh_link = found; |
| } |
| |
| /* Get the symbol table. */ |
| if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB |
| && ! bfd_section_from_shdr (abfd, hdr->sh_link)) |
| return false; |
| |
| /* If this reloc section does not use the main symbol table we |
| don't treat it as a reloc section. BFD can't adequately |
| represent such a section, so at least for now, we don't |
| try. We just present it as a normal section. */ |
| if (hdr->sh_link != elf_onesymtab (abfd)) |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| |
| if (! bfd_section_from_shdr (abfd, hdr->sh_info)) |
| return false; |
| target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info); |
| if (target_sect == NULL) |
| return false; |
| |
| if ((target_sect->flags & SEC_RELOC) == 0 |
| || target_sect->reloc_count == 0) |
| hdr2 = &elf_section_data (target_sect)->rel_hdr; |
| else |
| { |
| BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL); |
| hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2)); |
| elf_section_data (target_sect)->rel_hdr2 = hdr2; |
| } |
| *hdr2 = *hdr; |
| elf_elfsections (abfd)[shindex] = hdr2; |
| target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize; |
| target_sect->flags |= SEC_RELOC; |
| target_sect->relocation = NULL; |
| target_sect->rel_filepos = hdr->sh_offset; |
| /* In the section to which the relocations apply, mark whether |
| its relocations are of the REL or RELA variety. */ |
| elf_section_data (target_sect)->use_rela_p |
| = (hdr->sh_type == SHT_RELA); |
| abfd->flags |= HAS_RELOC; |
| return true; |
| } |
| break; |
| |
| case SHT_GNU_verdef: |
| elf_dynverdef (abfd) = shindex; |
| elf_tdata (abfd)->dynverdef_hdr = *hdr; |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| break; |
| |
| case SHT_GNU_versym: |
| elf_dynversym (abfd) = shindex; |
| elf_tdata (abfd)->dynversym_hdr = *hdr; |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| break; |
| |
| case SHT_GNU_verneed: |
| elf_dynverref (abfd) = shindex; |
| elf_tdata (abfd)->dynverref_hdr = *hdr; |
| return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
| break; |
| |
| case SHT_SHLIB: |
| return true; |
| |
| default: |
| /* Check for any processor-specific section types. */ |
| { |
| if (bed->elf_backend_section_from_shdr) |
| (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); |
| } |
| break; |
| } |
| |
| return true; |
| } |
| |
| /* Given an ELF section number, retrieve the corresponding BFD |
| section. */ |
| |
| asection * |
| bfd_section_from_elf_index (abfd, index) |
| bfd *abfd; |
| unsigned int index; |
| { |
| BFD_ASSERT (index > 0 && index < SHN_LORESERVE); |
| if (index >= elf_elfheader (abfd)->e_shnum) |
| return NULL; |
| return elf_elfsections (abfd)[index]->bfd_section; |
| } |
| |
| boolean |
| _bfd_elf_new_section_hook (abfd, sec) |
| bfd *abfd; |
| asection *sec; |
| { |
| struct bfd_elf_section_data *sdata; |
| |
| sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, sizeof (*sdata)); |
| if (!sdata) |
| return false; |
| sec->used_by_bfd = (PTR) sdata; |
| |
| /* Indicate whether or not this section should use RELA relocations. */ |
| sdata->use_rela_p |
| = get_elf_backend_data (abfd)->default_use_rela_p; |
| |
| return true; |
| } |
| |
| /* Create a new bfd section from an ELF program header. |
| |
| Since program segments have no names, we generate a synthetic name |
| of the form segment<NUM>, where NUM is generally the index in the |
| program header table. For segments that are split (see below) we |
| generate the names segment<NUM>a and segment<NUM>b. |
| |
| Note that some program segments may have a file size that is different than |
| (less than) the memory size. All this means is that at execution the |
| system must allocate the amount of memory specified by the memory size, |
| but only initialize it with the first "file size" bytes read from the |
| file. This would occur for example, with program segments consisting |
| of combined data+bss. |
| |
| To handle the above situation, this routine generates TWO bfd sections |
| for the single program segment. The first has the length specified by |
| the file size of the segment, and the second has the length specified |
| by the difference between the two sizes. In effect, the segment is split |
| into it's initialized and uninitialized parts. |
| |
| */ |
| |
| boolean |
| _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename) |
| bfd *abfd; |
| Elf_Internal_Phdr *hdr; |
| int index; |
| const char *typename; |
| { |
| asection *newsect; |
| char *name; |
| char namebuf[64]; |
| int split; |
| |
| split = ((hdr->p_memsz > 0) |
| && (hdr->p_filesz > 0) |
| && (hdr->p_memsz > hdr->p_filesz)); |
| sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : ""); |
| name = bfd_alloc (abfd, strlen (namebuf) + 1); |
| if (!name) |
| return false; |
| strcpy (name, namebuf); |
| newsect = bfd_make_section (abfd, name); |
| if (newsect == NULL) |
| return false; |
| newsect->vma = hdr->p_vaddr; |
| newsect->lma = hdr->p_paddr; |
| newsect->_raw_size = hdr->p_filesz; |
| newsect->filepos = hdr->p_offset; |
| newsect->flags |= SEC_HAS_CONTENTS; |
| if (hdr->p_type == PT_LOAD) |
| { |
| newsect->flags |= SEC_ALLOC; |
| newsect->flags |= SEC_LOAD; |
| if (hdr->p_flags & PF_X) |
| { |
| /* FIXME: all we known is that it has execute PERMISSION, |
| may be data. */ |
| newsect->flags |= SEC_CODE; |
| } |
| } |
| if (!(hdr->p_flags & PF_W)) |
| { |
| newsect->flags |= SEC_READONLY; |
| } |
| |
| if (split) |
| { |
| sprintf (namebuf, "%s%db", typename, index); |
| name = bfd_alloc (abfd, strlen (namebuf) + 1); |
| if (!name) |
| return false; |
| strcpy (name, namebuf); |
| newsect = bfd_make_section (abfd, name); |
| if (newsect == NULL) |
| return false; |
| newsect->vma = hdr->p_vaddr + hdr->p_filesz; |
| newsect->lma = hdr->p_paddr + hdr->p_filesz; |
| newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; |
| if (hdr->p_type == PT_LOAD) |
| { |
| newsect->flags |= SEC_ALLOC; |
| if (hdr->p_flags & PF_X) |
| newsect->flags |= SEC_CODE; |
| } |
| if (!(hdr->p_flags & PF_W)) |
| newsect->flags |= SEC_READONLY; |
| } |
| |
| return true; |
| } |
| |
| boolean |
| bfd_section_from_phdr (abfd, hdr, index) |
| bfd *abfd; |
| Elf_Internal_Phdr *hdr; |
| int index; |
| { |
| struct elf_backend_data *bed; |
| |
| switch (hdr->p_type) |
| { |
| case PT_NULL: |
| return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null"); |
| |
| case PT_LOAD: |
| return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load"); |
| |
| case PT_DYNAMIC: |
| return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic"); |
| |
| case PT_INTERP: |
| return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp"); |
| |
| case PT_NOTE: |
| if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note")) |
| return false; |
| if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz)) |
| return false; |
| return true; |
| |
| case PT_SHLIB: |
| return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib"); |
| |
| case PT_PHDR: |
| return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr"); |
| |
| default: |
| /* Check for any processor-specific program segment types. |
| If no handler for them, default to making "segment" sections. */ |
| bed = get_elf_backend_data (abfd); |
| if (bed->elf_backend_section_from_phdr) |
| return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index); |
| else |
| return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment"); |
| } |
| } |
| |
| /* Initialize REL_HDR, the section-header for new section, containing |
| relocations against ASECT. If USE_RELA_P is true, we use RELA |
| relocations; otherwise, we use REL relocations. */ |
| |
| boolean |
| _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p) |
| bfd *abfd; |
| Elf_Internal_Shdr *rel_hdr; |
| asection *asect; |
| boolean use_rela_p; |
| { |
| char *name; |
| struct elf_backend_data *bed; |
| |
| bed = get_elf_backend_data (abfd); |
| name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name)); |
| if (name == NULL) |
| return false; |
| sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name); |
| rel_hdr->sh_name = |
| (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name, |
| true, false); |
| if (rel_hdr->sh_name == (unsigned int) -1) |
| return false; |
| rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; |
| rel_hdr->sh_entsize = (use_rela_p |
| ? bed->s->sizeof_rela |
| : bed->s->sizeof_rel); |
| rel_hdr->sh_addralign = bed->s->file_align; |
| rel_hdr->sh_flags = 0; |
| rel_hdr->sh_addr = 0; |
| rel_hdr->sh_size = 0; |
| rel_hdr->sh_offset = 0; |
| |
| return true; |
| } |
| |
| /* Set up an ELF internal section header for a section. */ |
| |
| /*ARGSUSED*/ |
| static void |
| elf_fake_sections (abfd, asect, failedptrarg) |
| bfd *abfd; |
| asection *asect; |
| PTR failedptrarg; |
| { |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| boolean *failedptr = (boolean *) failedptrarg; |
| Elf_Internal_Shdr *this_hdr; |
| |
| if (*failedptr) |
| { |
| /* We already failed; just get out of the bfd_map_over_sections |
| loop. */ |
| return; |
| } |
| |
| this_hdr = &elf_section_data (asect)->this_hdr; |
| |
| this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd), |
| asect->name, |
| true, false); |
| if (this_hdr->sh_name == (unsigned long) -1) |
| { |
| *failedptr = true; |
| return; |
| } |
| |
| this_hdr->sh_flags = 0; |
| |
| if ((asect->flags & SEC_ALLOC) != 0 |
| || asect->user_set_vma) |
| this_hdr->sh_addr = asect->vma; |
| else |
| this_hdr->sh_addr = 0; |
| |
| this_hdr->sh_offset = 0; |
| this_hdr->sh_size = asect->_raw_size; |
| this_hdr->sh_link = 0; |
| this_hdr->sh_addralign = 1 << asect->alignment_power; |
| /* The sh_entsize and sh_info fields may have been set already by |
| copy_private_section_data. */ |
| |
| this_hdr->bfd_section = asect; |
| this_hdr->contents = NULL; |
| |
| /* FIXME: This should not be based on section names. */ |
| if (strcmp (asect->name, ".dynstr") == 0) |
| this_hdr->sh_type = SHT_STRTAB; |
| else if (strcmp (asect->name, ".hash") == 0) |
| { |
| this_hdr->sh_type = SHT_HASH; |
| this_hdr->sh_entsize = bed->s->sizeof_hash_entry; |
| } |
| else if (strcmp (asect->name, ".dynsym") == 0) |
| { |
| this_hdr->sh_type = SHT_DYNSYM; |
| this_hdr->sh_entsize = bed->s->sizeof_sym; |
| } |
| else if (strcmp (asect->name, ".dynamic") == 0) |
| { |
| this_hdr->sh_type = SHT_DYNAMIC; |
| this_hdr->sh_entsize = bed->s->sizeof_dyn; |
| } |
| else if (strncmp (asect->name, ".rela", 5) == 0 |
| && get_elf_backend_data (abfd)->may_use_rela_p) |
| { |
| this_hdr->sh_type = SHT_RELA; |
| this_hdr->sh_entsize = bed->s->sizeof_rela; |
| } |
| else if (strncmp (asect->name, ".rel", 4) == 0 |
| && get_elf_backend_data (abfd)->may_use_rel_p) |
| { |
| this_hdr->sh_type = SHT_REL; |
| this_hdr->sh_entsize = bed->s->sizeof_rel; |
| } |
| else if (strncmp (asect->name, ".note", 5) == 0) |
| this_hdr->sh_type = SHT_NOTE; |
| else if (strncmp (asect->name, ".stab", 5) == 0 |
| && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) |
| this_hdr->sh_type = SHT_STRTAB; |
| else if (strcmp (asect->name, ".gnu.version") == 0) |
| { |
| this_hdr->sh_type = SHT_GNU_versym; |
| this_hdr->sh_entsize = sizeof (Elf_External_Versym); |
| } |
| else if (strcmp (asect->name, ".gnu.version_d") == 0) |
| { |
| this_hdr->sh_type = SHT_GNU_verdef; |
| this_hdr->sh_entsize = 0; |
| /* objcopy or strip will copy over sh_info, but may not set |
| cverdefs. The linker will set cverdefs, but sh_info will be |
| zero. */ |
| if (this_hdr->sh_info == 0) |
| this_hdr->sh_info = elf_tdata (abfd)->cverdefs; |
| else |
| BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0 |
| || this_hdr->sh_info == elf_tdata (abfd)->cverdefs); |
| } |
| else if (strcmp (asect->name, ".gnu.version_r") == 0) |
| { |
| this_hdr->sh_type = SHT_GNU_verneed; |
| this_hdr->sh_entsize = 0; |
| /* objcopy or strip will copy over sh_info, but may not set |
| cverrefs. The linker will set cverrefs, but sh_info will be |
| zero. */ |
| if (this_hdr->sh_info == 0) |
| this_hdr->sh_info = elf_tdata (abfd)->cverrefs; |
| else |
| BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0 |
| || this_hdr->sh_info == elf_tdata (abfd)->cverrefs); |
| } |
| else if ((asect->flags & SEC_ALLOC) != 0 |
| && (asect->flags & SEC_LOAD) != 0) |
| this_hdr->sh_type = SHT_PROGBITS; |
| else if ((asect->flags & SEC_ALLOC) != 0 |
| && ((asect->flags & SEC_LOAD) == 0)) |
| this_hdr->sh_type = SHT_NOBITS; |
| else |
| { |
| /* Who knows? */ |
| this_hdr->sh_type = SHT_PROGBITS; |
| } |
| |
| if ((asect->flags & SEC_ALLOC) != 0) |
| this_hdr->sh_flags |= SHF_ALLOC; |
| if ((asect->flags & SEC_READONLY) == 0) |
| this_hdr->sh_flags |= SHF_WRITE; |
| if ((asect->flags & SEC_CODE) != 0) |
| this_hdr->sh_flags |= SHF_EXECINSTR; |
| |
| /* Check for processor-specific section types. */ |
| if (bed->elf_backend_fake_sections) |
| (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); |
| |
| /* If the section has relocs, set up a section header for the |
| SHT_REL[A] section. If two relocation sections are required for |
| this section, it is up to the processor-specific back-end to |
| create the other. */ |
| if ((asect->flags & SEC_RELOC) != 0 |
| && !_bfd_elf_init_reloc_shdr (abfd, |
| &elf_section_data (asect)->rel_hdr, |
| asect, |
| elf_section_data (asect)->use_rela_p)) |
| *failedptr = true; |
| } |
| |
| /* Assign all ELF section numbers. The dummy first section is handled here |
| too. The link/info pointers for the standard section types are filled |
| in here too, while we're at it. */ |
| |
| static boolean |
| assign_section_numbers (abfd) |
| bfd *abfd; |
| { |
| struct elf_obj_tdata *t = elf_tdata (abfd); |
| asection *sec; |
| unsigned int section_number; |
| Elf_Internal_Shdr **i_shdrp; |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| |
| section_number = 1; |
| |
| for (sec = abfd->sections; sec; sec = sec->next) |
| { |
| struct bfd_elf_section_data *d = elf_section_data (sec); |
| |
| d->this_idx = section_number++; |
| if ((sec->flags & SEC_RELOC) == 0) |
| d->rel_idx = 0; |
| else |
| d->rel_idx = section_number++; |
| |
| if (d->rel_hdr2) |
| d->rel_idx2 = section_number++; |
| else |
| d->rel_idx2 = 0; |
| } |
| |
| t->shstrtab_section = section_number++; |
| elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; |
| t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); |
| |
| if (bfd_get_symcount (abfd) > 0) |
| { |
| t->symtab_section = section_number++; |
| t->strtab_section = section_number++; |
| } |
| |
| elf_elfheader (abfd)->e_shnum = section_number; |
| |
| /* Set up the list of section header pointers, in agreement with the |
| indices. */ |
| i_shdrp = ((Elf_Internal_Shdr **) |
| bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); |
| if (i_shdrp == NULL) |
| return false; |
| |
| i_shdrp[0] = ((Elf_Internal_Shdr *) |
| bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); |
| if (i_shdrp[0] == NULL) |
| { |
| bfd_release (abfd, i_shdrp); |
| return false; |
| } |
| memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); |
| |
| elf_elfsections (abfd) = i_shdrp; |
| |
| i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; |
| if (bfd_get_symcount (abfd) > 0) |
| { |
| i_shdrp[t->symtab_section] = &t->symtab_hdr; |
| i_shdrp[t->strtab_section] = &t->strtab_hdr; |
| t->symtab_hdr.sh_link = t->strtab_section; |
| } |
| for (sec = abfd->sections; sec; sec = sec->next) |
| { |
| struct bfd_elf_section_data *d = elf_section_data (sec); |
| asection *s; |
| const char *name; |
| |
| i_shdrp[d->this_idx] = &d->this_hdr; |
| if (d->rel_idx != 0) |
| i_shdrp[d->rel_idx] = &d->rel_hdr; |
| if (d->rel_idx2 != 0) |
| i_shdrp[d->rel_idx2] = d->rel_hdr2; |
| |
| /* Fill in the sh_link and sh_info fields while we're at it. */ |
| |
| /* sh_link of a reloc section is the section index of the symbol |
| table. sh_info is the section index of the section to which |
| the relocation entries apply. */ |
| if (d->rel_idx != 0) |
| { |
| d->rel_hdr.sh_link = t->symtab_section; |
| d->rel_hdr.sh_info = d->this_idx; |
| } |
| if (d->rel_idx2 != 0) |
| { |
| d->rel_hdr2->sh_link = t->symtab_section; |
| d->rel_hdr2->sh_info = d->this_idx; |
| } |
| |
| switch (d->this_hdr.sh_type) |
| { |
| case SHT_REL: |
| case SHT_RELA: |
| /* A reloc section which we are treating as a normal BFD |
| section. sh_link is the section index of the symbol |
| table. sh_info is the section index of the section to |
| which the relocation entries apply. We assume that an |
| allocated reloc section uses the dynamic symbol table. |
| FIXME: How can we be sure? */ |
| s = bfd_get_section_by_name (abfd, ".dynsym"); |
| if (s != NULL) |
| d->this_hdr.sh_link = elf_section_data (s)->this_idx; |
| |
| /* We look up the section the relocs apply to by name. */ |
| name = sec->name; |
| if (d->this_hdr.sh_type == SHT_REL) |
| name += 4; |
| else |
| name += 5; |
| s = bfd_get_section_by_name (abfd, name); |
| if (s != NULL) |
| d->this_hdr.sh_info = elf_section_data (s)->this_idx; |
| break; |
| |
| case SHT_STRTAB: |
| /* We assume that a section named .stab*str is a stabs |
| string section. We look for a section with the same name |
| but without the trailing ``str'', and set its sh_link |
| field to point to this section. */ |
| if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 |
| && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) |
| { |
| size_t len; |
| char *alc; |
| |
| len = strlen (sec->name); |
| alc = (char *) bfd_malloc (len - 2); |
| if (alc == NULL) |
| return false; |
| strncpy (alc, sec->name, len - 3); |
| alc[len - 3] = '\0'; |
| s = bfd_get_section_by_name (abfd, alc); |
| free (alc); |
| if (s != NULL) |
| { |
| elf_section_data (s)->this_hdr.sh_link = d->this_idx; |
| |
| /* This is a .stab section. */ |
| elf_section_data (s)->this_hdr.sh_entsize = |
| 4 + 2 * (bed->s->arch_size / 8); |
| } |
| } |
| break; |
| |
| case SHT_DYNAMIC: |
| case SHT_DYNSYM: |
| case SHT_GNU_verneed: |
| case SHT_GNU_verdef: |
| /* sh_link is the section header index of the string table |
| used for the dynamic entries, or the symbol table, or the |
| version strings. */ |
| s = bfd_get_section_by_name (abfd, ".dynstr"); |
| if (s != NULL) |
| d->this_hdr.sh_link = elf_section_data (s)->this_idx; |
| break; |
| |
| case SHT_HASH: |
| case SHT_GNU_versym: |
| /* sh_link is the section header index of the symbol table |
| this hash table or version table is for. */ |
| s = bfd_get_section_by_name (abfd, ".dynsym"); |
| if (s != NULL) |
| d->this_hdr.sh_link = elf_section_data (s)->this_idx; |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Map symbol from it's internal number to the external number, moving |
| all local symbols to be at the head of the list. */ |
| |
| static INLINE int |
| sym_is_global (abfd, sym) |
| bfd *abfd; |
| asymbol *sym; |
| { |
| /* If the backend has a special mapping, use it. */ |
| if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) |
| return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) |
| (abfd, sym)); |
| |
| return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 |
| || bfd_is_und_section (bfd_get_section (sym)) |
| || bfd_is_com_section (bfd_get_section (sym))); |
| } |
| |
| static boolean |
| elf_map_symbols (abfd) |
| bfd *abfd; |
| { |
| int symcount = bfd_get_symcount (abfd); |
| asymbol **syms = bfd_get_outsymbols (abfd); |
| asymbol **sect_syms; |
| int num_locals = 0; |
| int num_globals = 0; |
| int num_locals2 = 0; |
| int num_globals2 = 0; |
| int max_index = 0; |
| int num_sections = 0; |
| int idx; |
| asection *asect; |
| asymbol **new_syms; |
| asymbol *sym; |
| |
| #ifdef DEBUG |
| fprintf (stderr, "elf_map_symbols\n"); |
| fflush (stderr); |
| #endif |
| |
| /* Add a section symbol for each BFD section. FIXME: Is this really |
| necessary? */ |
| for (asect = abfd->sections; asect; asect = asect->next) |
| { |
| if (max_index < asect->index) |
| max_index = asect->index; |
| } |
| |
| max_index++; |
| sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); |
| if (sect_syms == NULL) |
| return false; |
| elf_section_syms (abfd) = sect_syms; |
| |
| for (idx = 0; idx < symcount; idx++) |
| { |
| sym = syms[idx]; |
| |
| if ((sym->flags & BSF_SECTION_SYM) != 0 |
| && sym->value == 0) |
| { |
| asection *sec; |
| |
| sec = sym->section; |
| |
| if (sec->owner != NULL) |
| { |
| if (sec->owner != abfd) |
| { |
| if (sec->output_offset != 0) |
| continue; |
| |
| sec = sec->output_section; |
| |
| /* Empty sections in the input files may have had a section |
| symbol created for them. (See the comment near the end of |
| _bfd_generic_link_output_symbols in linker.c). If the linker |
| script discards such sections then we will reach this point. |
| Since we know that we cannot avoid this case, we detect it |
| and skip the abort and the assignment to the sect_syms array. |
| To reproduce this particular case try running the linker |
| testsuite test ld-scripts/weak.exp for an ELF port that uses |
| the generic linker. */ |
| if (sec->owner == NULL) |
| continue; |
| |
| BFD_ASSERT (sec->owner == abfd); |
| } |
| sect_syms[sec->index] = syms[idx]; |
| } |
| } |
| } |
| |
| for (asect = abfd->sections; asect; asect = asect->next) |
| { |
| if (sect_syms[asect->index] != NULL) |
| continue; |
| |
| sym = bfd_make_empty_symbol (abfd); |
| if (sym == NULL) |
| return false; |
| sym->the_bfd = abfd; |
| sym->name = asect->name; |
| sym->value = 0; |
| /* Set the flags to 0 to indicate that this one was newly added. */ |
| sym->flags = 0; |
| sym->section = asect; |
| sect_syms[asect->index] = sym; |
| num_sections++; |
| #ifdef DEBUG |
| fprintf (stderr, |
| _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"), |
| asect->name, (long) asect->vma, asect->index, (long) asect); |
| #endif |
| } |
| |
| /* Classify all of the symbols. */ |
| for (idx = 0; idx < symcount; idx++) |
| { |
| if (!sym_is_global (abfd, syms[idx])) |
| num_locals++; |
| else |
| num_globals++; |
| } |
| for (asect = abfd->sections; asect; asect = asect->next) |
| { |
| if (sect_syms[asect->index] != NULL |
| && sect_syms[asect->index]->flags == 0) |
| { |
| sect_syms[asect->index]->flags = BSF_SECTION_SYM; |
| if (!sym_is_global (abfd, sect_syms[asect->index])) |
| num_locals++; |
| else |
| num_globals++; |
| sect_syms[asect->index]->flags = 0; |
| } |
| } |
| |
| /* Now sort the symbols so the local symbols are first. */ |
| new_syms = ((asymbol **) |
| bfd_alloc (abfd, |
| (num_locals + num_globals) * sizeof (asymbol *))); |
| if (new_syms == NULL) |
| return false; |
| |
| for (idx = 0; idx < symcount; idx++) |
| { |
| asymbol *sym = syms[idx]; |
| int i; |
| |
| if (!sym_is_global (abfd, sym)) |
| i = num_locals2++; |
| else |
| i = num_locals + num_globals2++; |
| new_syms[i] = sym; |
| sym->udata.i = i + 1; |
| } |
| for (asect = abfd->sections; asect; asect = asect->next) |
| { |
| if (sect_syms[asect->index] != NULL |
| && sect_syms[asect->index]->flags == 0) |
| { |
| asymbol *sym = sect_syms[asect->index]; |
| int i; |
| |
| sym->flags = BSF_SECTION_SYM; |
| if (!sym_is_global (abfd, sym)) |
| i = num_locals2++; |
| else |
| i = num_locals + num_globals2++; |
| new_syms[i] = sym; |
| sym->udata.i = i + 1; |
| } |
| } |
| |
| bfd_set_symtab (abfd, new_syms, num_locals + num_globals); |
| |
| elf_num_locals (abfd) = num_locals; |
| elf_num_globals (abfd) = num_globals; |
| return true; |
| } |
| |
| /* Align to the maximum file alignment that could be required for any |
| ELF data structure. */ |
| |
| static INLINE file_ptr align_file_position PARAMS ((file_ptr, int)); |
| static INLINE file_ptr |
| align_file_position (off, align) |
| file_ptr off; |
| int align; |
| { |
| return (off + align - 1) & ~(align - 1); |
| } |
| |
| /* Assign a file position to a section, optionally aligning to the |
| required section alignment. */ |
| |
| INLINE file_ptr |
| _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align) |
| Elf_Internal_Shdr *i_shdrp; |
| file_ptr offset; |
| boolean align; |
| { |
| if (align) |
| { |
| unsigned int al; |
| |
| al = i_shdrp->sh_addralign; |
| if (al > 1) |
| offset = BFD_ALIGN (offset, al); |
| } |
| i_shdrp->sh_offset = offset; |
| if (i_shdrp->bfd_section != NULL) |
| i_shdrp->bfd_section->filepos = offset; |
| if (i_shdrp->sh_type != SHT_NOBITS) |
| offset += i_shdrp->sh_size; |
| return offset; |
| } |
| |
| /* Compute the file positions we are going to put the sections at, and |
| otherwise prepare to begin writing out the ELF file. If LINK_INFO |
| is not NULL, this is being called by the ELF backend linker. */ |
| |
| boolean |
| _bfd_elf_compute_section_file_positions (abfd, link_info) |
| bfd *abfd; |
| struct bfd_link_info *link_info; |
| { |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| boolean failed; |
| struct bfd_strtab_hash *strtab; |
| Elf_Internal_Shdr *shstrtab_hdr; |
| |
| if (abfd->output_has_begun) |
| return true; |
| |
| /* Do any elf backend specific processing first. */ |
| if (bed->elf_backend_begin_write_processing) |
| (*bed->elf_backend_begin_write_processing) (abfd, link_info); |
| |
| if (! prep_headers (abfd)) |
| return false; |
| |
| /* Post process the headers if necessary. */ |
| if (bed->elf_backend_post_process_headers) |
| (*bed->elf_backend_post_process_headers) (abfd, link_info); |
| |
| failed = false; |
| bfd_map_over_sections (abfd, elf_fake_sections, &failed); |
| if (failed) |
| return false; |
| |
| if (!assign_section_numbers (abfd)) |
| return false; |
| |
| /* The backend linker builds symbol table information itself. */ |
| if (link_info == NULL && bfd_get_symcount (abfd) > 0) |
| { |
| /* Non-zero if doing a relocatable link. */ |
| int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC)); |
| |
| if (! swap_out_syms (abfd, &strtab, relocatable_p)) |
| return false; |
| } |
| |
| shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; |
| /* sh_name was set in prep_headers. */ |
| shstrtab_hdr->sh_type = SHT_STRTAB; |
| shstrtab_hdr->sh_flags = 0; |
| shstrtab_hdr->sh_addr = 0; |
| shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); |
| shstrtab_hdr->sh_entsize = 0; |
| shstrtab_hdr->sh_link = 0; |
| shstrtab_hdr->sh_info = 0; |
| /* sh_offset is set in assign_file_positions_except_relocs. */ |
| shstrtab_hdr->sh_addralign = 1; |
| |
| if (!assign_file_positions_except_relocs (abfd)) |
| return false; |
| |
| if (link_info == NULL && bfd_get_symcount (abfd) > 0) |
| { |
| file_ptr off; |
| Elf_Internal_Shdr *hdr; |
| |
| off = elf_tdata (abfd)->next_file_pos; |
| |
| hdr = &elf_tdata (abfd)->symtab_hdr; |
| off = _bfd_elf_assign_file_position_for_section (hdr, off, true); |
| |
| hdr = &elf_tdata (abfd)->strtab_hdr; |
| off = _bfd_elf_assign_file_position_for_section (hdr, off, true); |
| |
| elf_tdata (abfd)->next_file_pos = off; |
| |
| /* Now that we know where the .strtab section goes, write it |
| out. */ |
| if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 |
| || ! _bfd_stringtab_emit (abfd, strtab)) |
| return false; |
| _bfd_stringtab_free (strtab); |
| } |
| |
| abfd->output_has_begun = true; |
| |
| return true; |
| } |
| |
| /* Create a mapping from a set of sections to a program segment. */ |
| |
| static INLINE struct elf_segment_map * |
| make_mapping (abfd, sections, from, to, phdr) |
| bfd *abfd; |
| asection **sections; |
| unsigned int from; |
| unsigned int to; |
| boolean phdr; |
| { |
| struct elf_segment_map *m; |
| unsigned int i; |
| asection **hdrpp; |
| |
| m = ((struct elf_segment_map *) |
| bfd_zalloc (abfd, |
| (sizeof (struct elf_segment_map) |
| + (to - from - 1) * sizeof (asection *)))); |
| if (m == NULL) |
| return NULL; |
| m->next = NULL; |
| m->p_type = PT_LOAD; |
| for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++) |
| m->sections[i - from] = *hdrpp; |
| m->count = to - from; |
| |
| if (from == 0 && phdr) |
| { |
| /* Include the headers in the first PT_LOAD segment. */ |
| m->includes_filehdr = 1; |
| m->includes_phdrs = 1; |
| } |
| |
| return m; |
| } |
| |
| /* Set up a mapping from BFD sections to program segments. */ |
| |
| static boolean |
| map_sections_to_segments (abfd) |
| bfd *abfd; |
| { |
| asection **sections = NULL; |
| asection *s; |
| unsigned int i; |
| unsigned int count; |
| struct elf_segment_map *mfirst; |
| struct elf_segment_map **pm; |
| struct elf_segment_map *m; |
| asection *last_hdr; |
| unsigned int phdr_index; |
| bfd_vma maxpagesize; |
| asection **hdrpp; |
| boolean phdr_in_segment = true; |
| boolean writable; |
| asection *dynsec; |
| |
| if (elf_tdata (abfd)->segment_map != NULL) |
| return true; |
| |
| if (bfd_count_sections (abfd) == 0) |
| return true; |
| |
| /* Select the allocated sections, and sort them. */ |
| |
| sections = (asection **) bfd_malloc (bfd_count_sections (abfd) |
| * sizeof (asection *)); |
| if (sections == NULL) |
| goto error_return; |
| |
| i = 0; |
| for (s = abfd->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_ALLOC) != 0) |
| { |
| sections[i] = s; |
| ++i; |
| } |
| } |
| BFD_ASSERT (i <= bfd_count_sections (abfd)); |
| count = i; |
| |
| qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections); |
| |
| /* Build the mapping. */ |
| |
| mfirst = NULL; |
| pm = &mfirst; |
| |
| /* If we have a .interp section, then create a PT_PHDR segment for |
| the program headers and a PT_INTERP segment for the .interp |
| section. */ |
| s = bfd_get_section_by_name (abfd, ".interp"); |
| if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| { |
| m = ((struct elf_segment_map *) |
| bfd_zalloc (abfd, sizeof (struct elf_segment_map))); |
| if (m == NULL) |
| goto error_return; |
| m->next = NULL; |
| m->p_type = PT_PHDR; |
| /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ |
| m->p_flags = PF_R | PF_X; |
| m->p_flags_valid = 1; |
| m->includes_phdrs = 1; |
| |
| *pm = m; |
| pm = &m->next; |
| |
| m = ((struct elf_segment_map *) |
| bfd_zalloc (abfd, sizeof (struct elf_segment_map))); |
| if (m == NULL) |
| goto error_return; |
| m->next = NULL; |
| m->p_type = PT_INTERP; |
| m->count = 1; |
| m->sections[0] = s; |
| |
| *pm = m; |
| pm = &m->next; |
| } |
| |
| /* Look through the sections. We put sections in the same program |
| segment when the start of the second section can be placed within |
| a few bytes of the end of the first section. */ |
| last_hdr = NULL; |
| phdr_index = 0; |
| maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
| writable = false; |
| dynsec = bfd_get_section_by_name (abfd, ".dynamic"); |
| if (dynsec != NULL |
| && (dynsec->flags & SEC_LOAD) == 0) |
| dynsec = NULL; |
| |
| /* Deal with -Ttext or something similar such that the first section |
| is not adjacent to the program headers. This is an |
| approximation, since at this point we don't know exactly how many |
| program headers we will need. */ |
| if (count > 0) |
| { |
| bfd_size_type phdr_size; |
| |
| phdr_size = elf_tdata (abfd)->program_header_size; |
| if (phdr_size == 0) |
| phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr; |
| if ((abfd->flags & D_PAGED) == 0 |
| || sections[0]->lma < phdr_size |
| || sections[0]->lma % maxpagesize < phdr_size % maxpagesize) |
| phdr_in_segment = false; |
| } |
| |
| for (i = 0, hdrpp = sections; i < count; i++, hdrpp++) |
| { |
| asection *hdr; |
| boolean new_segment; |
| |
| hdr = *hdrpp; |
| |
| /* See if this section and the last one will fit in the same |
| segment. */ |
| |
| if (last_hdr == NULL) |
| { |
| /* If we don't have a segment yet, then we don't need a new |
| one (we build the last one after this loop). */ |
| new_segment = false; |
| } |
| else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma) |
| { |
| /* If this section has a different relation between the |
| virtual address and the load address, then we need a new |
| segment. */ |
| new_segment = true; |
| } |
| else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize) |
| < BFD_ALIGN (hdr->lma, maxpagesize)) |
| { |
| /* If putting this section in this segment would force us to |
| skip a page in the segment, then we need a new segment. */ |
| new_segment = true; |
| } |
| else if ((last_hdr->flags & SEC_LOAD) == 0 |
| && (hdr->flags & SEC_LOAD) != 0) |
| { |
| /* We don't want to put a loadable section after a |
| nonloadable section in the same segment. */ |
| new_segment = true; |
| } |
| else if ((abfd->flags & D_PAGED) == 0) |
| { |
| /* If the file is not demand paged, which means that we |
| don't require the sections to be correctly aligned in the |
| file, then there is no other reason for a new segment. */ |
| new_segment = false; |
| } |
| else if (! writable |
| && (hdr->flags & SEC_READONLY) == 0 |
| && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize) |
| == hdr->lma)) |
| { |
| /* We don't want to put a writable section in a read only |
| segment, unless they are on the same page in memory |
| anyhow. We already know that the last section does not |
| bring us past the current section on the page, so the |
| only case in which the new section is not on the same |
| page as the previous section is when the previous section |
| ends precisely on a page boundary. */ |
| new_segment = true; |
| } |
| else |
| { |
| /* Otherwise, we can use the same segment. */ |
| new_segment = false; |
| } |
| |
| if (! new_segment) |
| { |
| if ((hdr->flags & SEC_READONLY) == 0) |
| writable = true; |
| last_hdr = hdr; |
| continue; |
| } |
| |
| /* We need a new program segment. We must create a new program |
| header holding all the sections from phdr_index until hdr. */ |
| |
| m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment); |
| if (m == NULL) |
| goto error_return; |
| |
| *pm = m; |
| pm = &m->next; |
| |
| if ((hdr->flags & SEC_READONLY) == 0) |
| writable = true; |
| else |
| writable = false; |
| |
| last_hdr = hdr; |
| phdr_index = i; |
| phdr_in_segment = false; |
| } |
| |
| /* Create a final PT_LOAD program segment. */ |
| if (last_hdr != NULL) |
| { |
| m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment); |
| if (m == NULL) |
| goto error_return; |
| |
| *pm = m; |
| pm = &m->next; |
| } |
| |
| /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */ |
| if (dynsec != NULL) |
| { |
| m = ((struct elf_segment_map *) |
| bfd_zalloc (abfd, sizeof (struct elf_segment_map))); |
| if (m == NULL) |
| goto error_return; |
| m->next = NULL; |
| m->p_type = PT_DYNAMIC; |
| m->count = 1; |
| m->sections[0] = dynsec; |
| |
| *pm = m; |
| pm = &m->next; |
| } |
| |
| /* For each loadable .note section, add a PT_NOTE segment. We don't |
| use bfd_get_section_by_name, because if we link together |
| nonloadable .note sections and loadable .note sections, we will |
| generate two .note sections in the output file. FIXME: Using |
| names for section types is bogus anyhow. */ |
| for (s = abfd->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_LOAD) != 0 |
| && strncmp (s->name, ".note", 5) == 0) |
| { |
| m = ((struct elf_segment_map *) |
| bfd_zalloc (abfd, sizeof (struct elf_segment_map))); |
| if (m == NULL) |
| goto error_return; |
| m->next = NULL; |
| m->p_type = PT_NOTE; |
| m->count = 1; |
| m->sections[0] = s; |
| |
| *pm = m; |
| pm = &m->next; |
| } |
| } |
| |
| free (sections); |
| sections = NULL; |
| |
| elf_tdata (abfd)->segment_map = mfirst; |
| return true; |
| |
| error_return: |
| if (sections != NULL) |
| free (sections); |
| return false; |
| } |
| |
| /* Sort sections by address. */ |
| |
| static int |
| elf_sort_sections (arg1, arg2) |
| const PTR arg1; |
| const PTR arg2; |
| { |
| const asection *sec1 = *(const asection **) arg1; |
| const asection *sec2 = *(const asection **) arg2; |
| |
| /* Sort by LMA first, since this is the address used to |
| place the section into a segment. */ |
| if (sec1->lma < sec2->lma) |
| return -1; |
| else if (sec1->lma > sec2->lma) |
| return 1; |
| |
| /* Then sort by VMA. Normally the LMA and the VMA will be |
| the same, and this will do nothing. */ |
| if (sec1->vma < sec2->vma) |
| return -1; |
| else if (sec1->vma > sec2->vma) |
| return 1; |
| |
| /* Put !SEC_LOAD sections after SEC_LOAD ones. */ |
| |
| #define TOEND(x) (((x)->flags & SEC_LOAD) == 0) |
| |
| if (TOEND (sec1)) |
| { |
| if (TOEND (sec2)) |
| return sec1->target_index - sec2->target_index; |
| else |
| return 1; |
| } |
| |
| if (TOEND (sec2)) |
| return -1; |
| |
| #undef TOEND |
| |
| /* Sort by size, to put zero sized sections before others at the |
| same address. */ |
| |
| if (sec1->_raw_size < sec2->_raw_size) |
| return -1; |
| if (sec1->_raw_size > sec2->_raw_size) |
| return 1; |
| |
| return sec1->target_index - sec2->target_index; |
| } |
| |
| /* Assign file positions to the sections based on the mapping from |
| sections to segments. This function also sets up some fields in |
| the file header, and writes out the program headers. */ |
| |
| static boolean |
| assign_file_positions_for_segments (abfd) |
| bfd *abfd; |
| { |
| const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| unsigned int count; |
| struct elf_segment_map *m; |
| unsigned int alloc; |
| Elf_Internal_Phdr *phdrs; |
| file_ptr off, voff; |
| bfd_vma filehdr_vaddr, filehdr_paddr; |
| bfd_vma phdrs_vaddr, phdrs_paddr; |
| Elf_Internal_Phdr *p; |
| |
| if (elf_tdata (abfd)->segment_map == NULL) |
| { |
| if (! map_sections_to_segments (abfd)) |
| return false; |
| } |
| |
| if (bed->elf_backend_modify_segment_map) |
| { |
| if (! (*bed->elf_backend_modify_segment_map) (abfd)) |
| return false; |
| } |
| |
| count = 0; |
| for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| ++count; |
| |
| elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr; |
| elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr; |
| elf_elfheader (abfd)->e_phnum = count; |
| |
| if (count == 0) |
| return true; |
| |
| /* If we already counted the number of program segments, make sure |
| that we allocated enough space. This happens when SIZEOF_HEADERS |
| is used in a linker script. */ |
| alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr; |
| if (alloc != 0 && count > alloc) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: Not enough room for program headers (allocated %u, need %u)"), |
| bfd_get_filename (abfd), alloc, count)); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| if (alloc == 0) |
| alloc = count; |
| |
| phdrs = ((Elf_Internal_Phdr *) |
| bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr))); |
| if (phdrs == NULL) |
| return false; |
| |
| off = bed->s->sizeof_ehdr; |
| off += alloc * bed->s->sizeof_phdr; |
| |
| filehdr_vaddr = 0; |
| filehdr_paddr = 0; |
| phdrs_vaddr = 0; |
| phdrs_paddr = 0; |
| |
| for (m = elf_tdata (abfd)->segment_map, p = phdrs; |
| m != NULL; |
| m = m->next, p++) |
| { |
| unsigned int i; |
| asection **secpp; |
| |
| /* If elf_segment_map is not from map_sections_to_segments, the |
| sections may not be correctly ordered. */ |
| if (m->count > 0) |
| qsort (m->sections, (size_t) m->count, sizeof (asection *), |
| elf_sort_sections); |
| |
| p->p_type = m->p_type; |
| p->p_flags = m->p_flags; |
| |
| if (p->p_type == PT_LOAD |
| && m->count > 0 |
| && (m->sections[0]->flags & SEC_ALLOC) != 0) |
| { |
| if ((abfd->flags & D_PAGED) != 0) |
| off += (m->sections[0]->vma - off) % bed->maxpagesize; |
| else |
| { |
| bfd_size_type align; |
| |
| align = 0; |
| for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) |
| { |
| bfd_size_type secalign; |
| |
| secalign = bfd_get_section_alignment (abfd, *secpp); |
| if (secalign > align) |
| align = secalign; |
| } |
| |
| off += (m->sections[0]->vma - off) % (1 << align); |
| } |
| } |
| |
| if (m->count == 0) |
| p->p_vaddr = 0; |
| else |
| p->p_vaddr = m->sections[0]->vma; |
| |
| if (m->p_paddr_valid) |
| p->p_paddr = m->p_paddr; |
| else if (m->count == 0) |
| p->p_paddr = 0; |
| else |
| p->p_paddr = m->sections[0]->lma; |
| |
| if (p->p_type == PT_LOAD |
| && (abfd->flags & D_PAGED) != 0) |
| p->p_align = bed->maxpagesize; |
| else if (m->count == 0) |
| p->p_align = bed->s->file_align; |
| else |
| p->p_align = 0; |
| |
| p->p_offset = 0; |
| p->p_filesz = 0; |
| p->p_memsz = 0; |
| |
| if (m->includes_filehdr) |
| { |
| if (! m->p_flags_valid) |
| p->p_flags |= PF_R; |
| p->p_offset = 0; |
| p->p_filesz = bed->s->sizeof_ehdr; |
| p->p_memsz = bed->s->sizeof_ehdr; |
| if (m->count > 0) |
| { |
| BFD_ASSERT (p->p_type == PT_LOAD); |
| |
| if (p->p_vaddr < (bfd_vma) off) |
| { |
| _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"), |
| bfd_get_filename (abfd)); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| p->p_vaddr -= off; |
| if (! m->p_paddr_valid) |
| p->p_paddr -= off; |
| } |
| if (p->p_type == PT_LOAD) |
| { |
| filehdr_vaddr = p->p_vaddr; |
| filehdr_paddr = p->p_paddr; |
| } |
| } |
| |
| if (m->includes_phdrs) |
| { |
| if (! m->p_flags_valid) |
| p->p_flags |= PF_R; |
| |
| if (m->includes_filehdr) |
| { |
| if (p->p_type == PT_LOAD) |
| { |
| phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr; |
| phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr; |
| } |
| } |
| else |
| { |
| p->p_offset = bed->s->sizeof_ehdr; |
| |
| if (m->count > 0) |
| { |
| BFD_ASSERT (p->p_type == PT_LOAD); |
| p->p_vaddr -= off - p->p_offset; |
| if (! m->p_paddr_valid) |
| p->p_paddr -= off - p->p_offset; |
| } |
| |
| if (p->p_type == PT_LOAD) |
| { |
| phdrs_vaddr = p->p_vaddr; |
| phdrs_paddr = p->p_paddr; |
| } |
| else |
| phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr; |
| } |
| |
| p->p_filesz += alloc * bed->s->sizeof_phdr; |
| p->p_memsz += alloc * bed->s->sizeof_phdr; |
| } |
| |
| if (p->p_type == PT_LOAD |
| || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)) |
| { |
| if (! m->includes_filehdr && ! m->includes_phdrs) |
| p->p_offset = off; |
| else |
| { |
| file_ptr adjust; |
| |
| adjust = off - (p->p_offset + p->p_filesz); |
| p->p_filesz += adjust; |
| p->p_memsz += adjust; |
| } |
| } |
| |
| voff = off; |
| |
| for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) |
| { |
| asection *sec; |
| flagword flags; |
| bfd_size_type align; |
| |
| sec = *secpp; |
| flags = sec->flags; |
| align = 1 << bfd_get_section_alignment (abfd, sec); |
| |
| /* The section may have artificial alignment forced by a |
| link script. Notice this case by the gap between the |
| cumulative phdr vma and the section's vma. */ |
| if (p->p_vaddr + p->p_memsz < sec->vma) |
| { |
| bfd_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz); |
| |
| p->p_memsz += adjust; |
| off += adjust; |
| voff += adjust; |
| if ((flags & SEC_LOAD) != 0) |
| p->p_filesz += adjust; |
| } |
| |
| if (p->p_type == PT_LOAD) |
| { |
| bfd_signed_vma adjust; |
| |
| if ((flags & SEC_LOAD) != 0) |
| { |
| adjust = sec->lma - (p->p_paddr + p->p_memsz); |
| if (adjust < 0) |
| adjust = 0; |
| } |
| else if ((flags & SEC_ALLOC) != 0) |
| { |
| /* The section VMA must equal the file position |
| modulo the page size. FIXME: I'm not sure if |
| this adjustment is really necessary. We used to |
| not have the SEC_LOAD case just above, and then |
| this was necessary, but now I'm not sure. */ |
| if ((abfd->flags & D_PAGED) != 0) |
| adjust = (sec->vma - voff) % bed->maxpagesize; |
| else |
| adjust = (sec->vma - voff) % align; |
| } |
| else |
| adjust = 0; |
| |
| if (adjust != 0) |
| { |
| if (i == 0) |
| { |
| (* _bfd_error_handler) |
| (_("Error: First section in segment (%s) starts at 0x%x"), |
| bfd_section_name (abfd, sec), sec->lma); |
| (* _bfd_error_handler) |
| (_(" whereas segment starts at 0x%x"), |
| p->p_paddr); |
| |
| return false; |
| } |
| p->p_memsz += adjust; |
| off += adjust; |
| voff += adjust; |
| if ((flags & SEC_LOAD) != 0) |
| p->p_filesz += adjust; |
| } |
| |
| sec->filepos = off; |
| |
| /* We check SEC_HAS_CONTENTS here because if NOLOAD is |
| used in a linker script we may have a section with |
| SEC_LOAD clear but which is supposed to have |
| contents. */ |
| if ((flags & SEC_LOAD) != 0 |
| || (flags & SEC_HAS_CONTENTS) != 0) |
| off += sec->_raw_size; |
| |
| if ((flags & SEC_ALLOC) != 0) |
| voff += sec->_raw_size; |
| } |
| |
| if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core) |
| { |
| if (i == 0) /* the actual "note" segment */ |
| { /* this one actually contains everything. */ |
| sec->filepos = off; |
| p->p_filesz = sec->_raw_size; |
| off += sec->_raw_size; |
| voff = off; |
| } |
| else /* fake sections -- don't need to be written */ |
| { |
| sec->filepos = 0; |
| sec->_raw_size = 0; |
| flags = sec->flags = 0; /* no contents */ |
| } |
| p->p_memsz = 0; |
| p->p_align = 1; |
| } |
| else |
| { |
| p->p_memsz += sec->_raw_size; |
| |
| if ((flags & SEC_LOAD) != 0) |
| p->p_filesz += sec->_raw_size; |
| |
| if (align > p->p_align |
| && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0)) |
| p->p_align = align; |
| } |
| |
| if (! m->p_flags_valid) |
| { |
| p->p_flags |= PF_R; |
| if ((flags & SEC_CODE) != 0) |
| p->p_flags |= PF_X; |
| if ((flags & SEC_READONLY) == 0) |
| p->p_flags |= PF_W; |
| } |
| } |
| } |
| |
| /* Now that we have set the section file positions, we can set up |
| the file positions for the non PT_LOAD segments. */ |
| for (m = elf_tdata (abfd)->segment_map, p = phdrs; |
| m != NULL; |
| m = m->next, p++) |
| { |
| if (p->p_type != PT_LOAD && m->count > 0) |
| { |
| BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs); |
| p->p_offset = m->sections[0]->filepos; |
| } |
| if (m->count == 0) |
| { |
| if (m->includes_filehdr) |
| { |
| p->p_vaddr = filehdr_vaddr; |
| if (! m->p_paddr_valid) |
| p->p_paddr = filehdr_paddr; |
| } |
| else if (m->includes_phdrs) |
| { |
| p->p_vaddr = phdrs_vaddr; |
| if (! m->p_paddr_valid) |
| p->p_paddr = phdrs_paddr; |
| } |
| } |
| } |
| |
| /* Clear out any program headers we allocated but did not use. */ |
| for (; count < alloc; count++, p++) |
| { |
| memset (p, 0, sizeof *p); |
| p->p_type = PT_NULL; |
| } |
| |
| elf_tdata (abfd)->phdr = phdrs; |
| |
| elf_tdata (abfd)->next_file_pos = off; |
| |
| /* Write out the program headers. */ |
| if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0 |
| || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0) |
| return false; |
| |
| return true; |
| } |
| |
| /* Get the size of the program header. |
| |
| If this is called by the linker before any of the section VMA's are set, it |
| can't calculate the correct value for a strange memory layout. This only |
| happens when SIZEOF_HEADERS is used in a linker script. In this case, |
| SORTED_HDRS is NULL and we assume the normal scenario of one text and one |
| data segment (exclusive of .interp and .dynamic). |
| |
| ??? User written scripts must either not use SIZEOF_HEADERS, or assume there |
| will be two segments. */ |
| |
| static bfd_size_type |
| get_program_header_size (abfd) |
| bfd *abfd; |
| { |
| size_t segs; |
| asection *s; |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| |
| /* We can't return a different result each time we're called. */ |
| if (elf_tdata (abfd)->program_header_size != 0) |
| return elf_tdata (abfd)->program_header_size; |
| |
| if (elf_tdata (abfd)->segment_map != NULL) |
| { |
| struct elf_segment_map *m; |
| |
| segs = 0; |
| for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| ++segs; |
| elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; |
| return elf_tdata (abfd)->program_header_size; |
| } |
| |
| /* Assume we will need exactly two PT_LOAD segments: one for text |
| and one for data. */ |
| segs = 2; |
| |
| s = bfd_get_section_by_name (abfd, ".interp"); |
| if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| { |
| /* If we have a loadable interpreter section, we need a |
| PT_INTERP segment. In this case, assume we also need a |
| PT_PHDR segment, although that may not be true for all |
| targets. */ |
| segs += 2; |
| } |
| |
| if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) |
| { |
| /* We need a PT_DYNAMIC segment. */ |
| ++segs; |
| } |
| |
| for (s = abfd->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_LOAD) != 0 |
| && strncmp (s->name, ".note", 5) == 0) |
| { |
| /* We need a PT_NOTE segment. */ |
| ++segs; |
| } |
| } |
| |
| /* Let the backend count up any program headers it might need. */ |
| if (bed->elf_backend_additional_program_headers) |
| { |
| int a; |
| |
| a = (*bed->elf_backend_additional_program_headers) (abfd); |
| if (a == -1) |
| abort (); |
| segs += a; |
| } |
| |
| elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; |
| return elf_tdata (abfd)->program_header_size; |
| } |
| |
| /* Work out the file positions of all the sections. This is called by |
| _bfd_elf_compute_section_file_positions. All the section sizes and |
| VMAs must be known before this is called. |
| |
| We do not consider reloc sections at this point, unless they form |
| part of the loadable image. Reloc sections are assigned file |
| positions in assign_file_positions_for_relocs, which is called by |
| write_object_contents and final_link. |
| |
| We also don't set the positions of the .symtab and .strtab here. */ |
| |
| static boolean |
| assign_file_positions_except_relocs (abfd) |
| bfd *abfd; |
| { |
| struct elf_obj_tdata * const tdata = elf_tdata (abfd); |
| Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); |
| Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); |
| file_ptr off; |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| |
| if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 |
| && bfd_get_format (abfd) != bfd_core) |
| { |
| Elf_Internal_Shdr **hdrpp; |
| unsigned int i; |
| |
| /* Start after the ELF header. */ |
| off = i_ehdrp->e_ehsize; |
| |
| /* We are not creating an executable, which means that we are |
| not creating a program header, and that the actual order of |
| the sections in the file is unimportant. */ |
| for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) |
| { |
| Elf_Internal_Shdr *hdr; |
| |
| hdr = *hdrpp; |
| if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) |
| { |
| hdr->sh_offset = -1; |
| continue; |
| } |
| if (i == tdata->symtab_section |
| || i == tdata->strtab_section) |
| { |
| hdr->sh_offset = -1; |
| continue; |
| } |
| |
| off = _bfd_elf_assign_file_position_for_section (hdr, off, true); |
| } |
| } |
| else |
| { |
| unsigned int i; |
| Elf_Internal_Shdr **hdrpp; |
| |
| /* Assign file positions for the loaded sections based on the |
| assignment of sections to segments. */ |
| if (! assign_file_positions_for_segments (abfd)) |
| return false; |
| |
| /* Assign file positions for the other sections. */ |
| |
| off = elf_tdata (abfd)->next_file_pos; |
| for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) |
| { |
| Elf_Internal_Shdr *hdr; |
| |
| hdr = *hdrpp; |
| if (hdr->bfd_section != NULL |
| && hdr->bfd_section->filepos != 0) |
| hdr->sh_offset = hdr->bfd_section->filepos; |
| else if ((hdr->sh_flags & SHF_ALLOC) != 0) |
| { |
| ((*_bfd_error_handler) |
| (_("%s: warning: allocated section `%s' not in segment"), |
| bfd_get_filename (abfd), |
| (hdr->bfd_section == NULL |
| ? "*unknown*" |
| : hdr->bfd_section->name))); |
| if ((abfd->flags & D_PAGED) != 0) |
| off += (hdr->sh_addr - off) % bed->maxpagesize; |
| else |
| off += (hdr->sh_addr - off) % hdr->sh_addralign; |
| off = _bfd_elf_assign_file_position_for_section (hdr, off, |
| false); |
| } |
| else if (hdr->sh_type == SHT_REL |
| || hdr->sh_type == SHT_RELA |
| || hdr == i_shdrpp[tdata->symtab_section] |
| || hdr == i_shdrpp[tdata->strtab_section]) |
| hdr->sh_offset = -1; |
| else |
| off = _bfd_elf_assign_file_position_for_section (hdr, off, true); |
| } |
| } |
| |
| /* Place the section headers. */ |
| off = align_file_position (off, bed->s->file_align); |
| i_ehdrp->e_shoff = off; |
| off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; |
| |
| elf_tdata (abfd)->next_file_pos = off; |
| |
| return true; |
| } |
| |
| static boolean |
| prep_headers (abfd) |
| bfd *abfd; |
| { |
| Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
| Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
| int count; |
| struct bfd_strtab_hash *shstrtab; |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| |
| i_ehdrp = elf_elfheader (abfd); |
| i_shdrp = elf_elfsections (abfd); |
| |
| shstrtab = _bfd_elf_stringtab_init (); |
| if (shstrtab == NULL) |
| return false; |
| |
| elf_shstrtab (abfd) = shstrtab; |
| |
| i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
| i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; |
| i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; |
| i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; |
| |
| i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass; |
| i_ehdrp->e_ident[EI_DATA] = |
| bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB; |
| i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current; |
| |
| i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_SYSV; |
| i_ehdrp->e_ident[EI_ABIVERSION] = 0; |
| |
| for (count = EI_PAD; count < EI_NIDENT; count++) |
| i_ehdrp->e_ident[count] = 0; |
| |
| if ((abfd->flags & DYNAMIC) != 0) |
| i_ehdrp->e_type = ET_DYN; |
| else if ((abfd->flags & EXEC_P) != 0) |
| i_ehdrp->e_type = ET_EXEC; |
| else if (bfd_get_format (abfd) == bfd_core) |
| i_ehdrp->e_type = ET_CORE; |
| else |
| i_ehdrp->e_type = ET_REL; |
| |
| switch (bfd_get_arch (abfd)) |
| { |
| case bfd_arch_unknown: |
| i_ehdrp->e_machine = EM_NONE; |
| break; |
| case bfd_arch_sparc: |
| if (bed->s->arch_size == 64) |
| i_ehdrp->e_machine = EM_SPARCV9; |
| else |
| i_ehdrp->e_machine = EM_SPARC; |
| break; |
| case bfd_arch_i386: |
| i_ehdrp->e_machine = EM_386; |
| break; |
| case bfd_arch_m68k: |
| i_ehdrp->e_machine = EM_68K; |
| break; |
| case bfd_arch_m88k: |
| i_ehdrp->e_machine = EM_88K; |
| break; |
| case bfd_arch_i860: |
| i_ehdrp->e_machine = EM_860; |
| break; |
| case bfd_arch_i960: |
| i_ehdrp->e_machine = EM_960; |
| break; |
| case bfd_arch_mips: /* MIPS Rxxxx */ |
| i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ |
| break; |
| case bfd_arch_hppa: |
| i_ehdrp->e_machine = EM_PARISC; |
| break; |
| case bfd_arch_powerpc: |
| i_ehdrp->e_machine = EM_PPC; |
| break; |
| case bfd_arch_alpha: |
| i_ehdrp->e_machine = EM_ALPHA; |
| break; |
| case bfd_arch_sh: |
| i_ehdrp->e_machine = EM_SH; |
| break; |
| case bfd_arch_d10v: |
| i_ehdrp->e_machine = EM_CYGNUS_D10V; |
| break; |
| case bfd_arch_d30v: |
| i_ehdrp->e_machine = EM_CYGNUS_D30V; |
| break; |
| case bfd_arch_fr30: |
| i_ehdrp->e_machine = EM_CYGNUS_FR30; |
| break; |
| case bfd_arch_mcore: |
| i_ehdrp->e_machine = EM_MCORE; |
| break; |
| case bfd_arch_v850: |
| switch (bfd_get_mach (abfd)) |
| { |
| default: |
| case 0: i_ehdrp->e_machine = EM_CYGNUS_V850; break; |
| } |
| break; |
| case bfd_arch_arc: |
| i_ehdrp->e_machine = EM_CYGNUS_ARC; |
| break; |
| case bfd_arch_arm: |
| i_ehdrp->e_machine = EM_ARM; |
| break; |
| case bfd_arch_m32r: |
| i_ehdrp->e_machine = EM_CYGNUS_M32R; |
| break; |
| case bfd_arch_mn10200: |
| i_ehdrp->e_machine = EM_CYGNUS_MN10200; |
| break; |
| case bfd_arch_mn10300: |
| i_ehdrp->e_machine = EM_CYGNUS_MN10300; |
| break; |
| case bfd_arch_pj: |
| i_ehdrp->e_machine = EM_PJ; |
| break; |
| /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
| default: |
| i_ehdrp->e_machine = EM_NONE; |
| } |
| i_ehdrp->e_version = bed->s->ev_current; |
| i_ehdrp->e_ehsize = bed->s->sizeof_ehdr; |
| |
| /* no program header, for now. */ |
| i_ehdrp->e_phoff = 0; |
| i_ehdrp->e_phentsize = 0; |
| i_ehdrp->e_phnum = 0; |
| |
| /* each bfd section is section header entry */ |
| i_ehdrp->e_entry = bfd_get_start_address (abfd); |
| i_ehdrp->e_shentsize = bed->s->sizeof_shdr; |
| |
| /* if we're building an executable, we'll need a program header table */ |
| if (abfd->flags & EXEC_P) |
| { |
| /* it all happens later */ |
| #if 0 |
| i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); |
| |
| /* elf_build_phdrs() returns a (NULL-terminated) array of |
| Elf_Internal_Phdrs */ |
| i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); |
| i_ehdrp->e_phoff = outbase; |
| outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; |
| #endif |
| } |
| else |
| { |
| i_ehdrp->e_phentsize = 0; |
| i_phdrp = 0; |
| i_ehdrp->e_phoff = 0; |
| } |
| |
| elf_tdata (abfd)->symtab_hdr.sh_name = |
| (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false); |
| elf_tdata (abfd)->strtab_hdr.sh_name = |
| (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false); |
| elf_tdata (abfd)->shstrtab_hdr.sh_name = |
| (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false); |
| if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 |
| || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 |
| || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) |
| return false; |
| |
| return true; |
| } |
| |
| /* Assign file positions for all the reloc sections which are not part |
| of the loadable file image. */ |
| |
| void |
| _bfd_elf_assign_file_positions_for_relocs (abfd) |
| bfd *abfd; |
| { |
| file_ptr off; |
| unsigned int i; |
| Elf_Internal_Shdr **shdrpp; |
| |
| off = elf_tdata (abfd)->next_file_pos; |
| |
| for (i = 1, shdrpp = elf_elfsections (abfd) + 1; |
| i < elf_elfheader (abfd)->e_shnum; |
| i++, shdrpp++) |
| { |
| Elf_Internal_Shdr *shdrp; |
| |
| shdrp = *shdrpp; |
| if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) |
| && shdrp->sh_offset == -1) |
| off = _bfd_elf_assign_file_position_for_section (shdrp, off, true); |
| } |
| |
| elf_tdata (abfd)->next_file_pos = off; |
| } |
| |
| boolean |
| _bfd_elf_write_object_contents (abfd) |
| bfd *abfd; |
| { |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| Elf_Internal_Ehdr *i_ehdrp; |
| Elf_Internal_Shdr **i_shdrp; |
| boolean failed; |
| unsigned int count; |
| |
| if (! abfd->output_has_begun |
| && ! _bfd_elf_compute_section_file_positions |
| (abfd, (struct bfd_link_info *) NULL)) |
| return false; |
| |
| i_shdrp = elf_elfsections (abfd); |
| i_ehdrp = elf_elfheader (abfd); |
| |
| failed = false; |
| bfd_map_over_sections (abfd, bed->s->write_relocs, &failed); |
| if (failed) |
| return false; |
| |
| _bfd_elf_assign_file_positions_for_relocs (abfd); |
| |
| /* After writing the headers, we need to write the sections too... */ |
| for (count = 1; count < i_ehdrp->e_shnum; count++) |
| { |
| if (bed->elf_backend_section_processing) |
| (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); |
| if (i_shdrp[count]->contents) |
| { |
| if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 |
| || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, |
| 1, abfd) |
| != i_shdrp[count]->sh_size)) |
| return false; |
| } |
| } |
| |
| /* Write out the section header names. */ |
| if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0 |
| || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd))) |
| return false; |
| |
| if (bed->elf_backend_final_write_processing) |
| (*bed->elf_backend_final_write_processing) (abfd, |
| elf_tdata (abfd)->linker); |
| |
| return bed->s->write_shdrs_and_ehdr (abfd); |
| } |
| |
| boolean |
| _bfd_elf_write_corefile_contents (abfd) |
| bfd *abfd; |
| { |
| /* Hopefully this can be done just like an object file. */ |
| return _bfd_elf_write_object_contents (abfd); |
| } |
| /* given a section, search the header to find them... */ |
| int |
| _bfd_elf_section_from_bfd_section (abfd, asect) |
| bfd *abfd; |
| struct sec *asect; |
| { |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); |
| int index; |
| Elf_Internal_Shdr *hdr; |
| int maxindex = elf_elfheader (abfd)->e_shnum; |
| |
| for (index = 0; index < maxindex; index++) |
| { |
| hdr = i_shdrp[index]; |
| if (hdr->bfd_section == asect) |
| return index; |
| } |
| |
| if (bed->elf_backend_section_from_bfd_section) |
| { |
| for (index = 0; index < maxindex; index++) |
| { |
| int retval; |
| |
| hdr = i_shdrp[index]; |
| retval = index; |
| if ((*bed->elf_backend_section_from_bfd_section) |
| (abfd, hdr, asect, &retval)) |
| return retval; |
| } |
| } |
| |
| if (bfd_is_abs_section (asect)) |
| return SHN_ABS; |
| if (bfd_is_com_section (asect)) |
| return SHN_COMMON; |
| if (bfd_is_und_section (asect)) |
| return SHN_UNDEF; |
| |
| bfd_set_error (bfd_error_nonrepresentable_section); |
| |
| return -1; |
| } |
| |
| /* Given a BFD symbol, return the index in the ELF symbol table, or -1 |
| on error. */ |
| |
| int |
| _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) |
| bfd *abfd; |
| asymbol **asym_ptr_ptr; |
| { |
| asymbol *asym_ptr = *asym_ptr_ptr; |
| int idx; |
| flagword flags = asym_ptr->flags; |
| |
| /* When gas creates relocations against local labels, it creates its |
| own symbol for the section, but does put the symbol into the |
| symbol chain, so udata is 0. When the linker is generating |
| relocatable output, this section symbol may be for one of the |
| input sections rather than the output section. */ |
| if (asym_ptr->udata.i == 0 |
| && (flags & BSF_SECTION_SYM) |
| && asym_ptr->section) |
| { |
| int indx; |
| |
| if (asym_ptr->section->output_section != NULL) |
| indx = asym_ptr->section->output_section->index; |
| else |
| indx = asym_ptr->section->index; |
| if (elf_section_syms (abfd)[indx]) |
| asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i; |
| } |
| |
| idx = asym_ptr->udata.i; |
| |
| if (idx == 0) |
| { |
| /* This case can occur when using --strip-symbol on a symbol |
| which is used in a relocation entry. */ |
| (*_bfd_error_handler) |
| (_("%s: symbol `%s' required but not present"), |
| bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr)); |
| bfd_set_error (bfd_error_no_symbols); |
| return -1; |
| } |
| |
| #if DEBUG & 4 |
| { |
| fprintf (stderr, |
| _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"), |
| (long) asym_ptr, asym_ptr->name, idx, flags, |
| elf_symbol_flags (flags)); |
| fflush (stderr); |
| } |
| #endif |
| |
| return idx; |
| } |
| |
| /* Copy private BFD data. This copies any program header information. */ |
| |
| static boolean |
| copy_private_bfd_data (ibfd, obfd) |
| bfd *ibfd; |
| bfd *obfd; |
| { |
| Elf_Internal_Ehdr *iehdr; |
| struct elf_segment_map *mfirst; |
| struct elf_segment_map **pm; |
| struct elf_segment_map *m; |
| Elf_Internal_Phdr *p; |
| unsigned int i; |
| unsigned int num_segments; |
| boolean phdr_included = false; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| return true; |
| |
| if (elf_tdata (ibfd)->phdr == NULL) |
| return true; |
| |
| iehdr = elf_elfheader (ibfd); |
| |
| mfirst = NULL; |
| pm = &mfirst; |
| |
| num_segments = elf_elfheader (ibfd)->e_phnum; |
| |
| #define IS_CONTAINED_BY(addr, len, bottom, phdr) \ |
| ((addr) >= (bottom) \ |
| && ( ((addr) + (len)) <= ((bottom) + (phdr)->p_memsz) \ |
| || ((addr) + (len)) <= ((bottom) + (phdr)->p_filesz))) |
| |
| /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */ |
| |
| #define IS_COREFILE_NOTE(p, s) \ |
| (p->p_type == PT_NOTE \ |
| && bfd_get_format (ibfd) == bfd_core \ |
| && s->vma == 0 && s->lma == 0 \ |
| && (bfd_vma) s->filepos >= p->p_offset \ |
| && (bfd_vma) s->filepos + s->_raw_size \ |
| <= p->p_offset + p->p_filesz) |
| |
| /* The complicated case when p_vaddr is 0 is to handle the Solaris |
| linker, which generates a PT_INTERP section with p_vaddr and |
| p_memsz set to 0. */ |
| |
| #define IS_SOLARIS_PT_INTERP(p, s) \ |
| (p->p_vaddr == 0 \ |
| && p->p_filesz > 0 \ |
| && (s->flags & SEC_HAS_CONTENTS) != 0 \ |
| && s->_raw_size > 0 \ |
| && (bfd_vma) s->filepos >= p->p_offset \ |
| && ((bfd_vma) s->filepos + s->_raw_size \ |
| <= p->p_offset + p->p_filesz)) |
| |
| /* Scan through the segments specified in the program header |
| of the input BFD. */ |
| for (i = 0, p = elf_tdata (ibfd)->phdr; i < num_segments; i++, p++) |
| { |
| unsigned int csecs; |
| asection *s; |
| asection **sections; |
| asection *os; |
| unsigned int isec; |
| bfd_vma matching_lma; |
| bfd_vma suggested_lma; |
| unsigned int j; |
| |
| /* For each section in the input BFD, decide if it should be |
| included in the current segment. A section will be included |
| if it is within the address space of the segment, and it is |
| an allocated segment, and there is an output section |
| associated with it. */ |
| csecs = 0; |
| for (s = ibfd->sections; s != NULL; s = s->next) |
| if (s->output_section != NULL) |
| { |
| if ((IS_CONTAINED_BY (s->vma, s->_raw_size, p->p_vaddr, p) |
| || IS_SOLARIS_PT_INTERP (p, s)) |
| && (s->flags & SEC_ALLOC) != 0) |
| ++csecs; |
| else if (IS_COREFILE_NOTE (p, s)) |
| ++csecs; |
| } |
| |
| /* Allocate a segment map big enough to contain all of the |
| sections we have selected. */ |
| m = ((struct elf_segment_map *) |
| bfd_alloc (obfd, |
| (sizeof (struct elf_segment_map) |
| + ((size_t) csecs - 1) * sizeof (asection *)))); |
| if (m == NULL) |
| return false; |
| |
| /* Initialise the fields of the segment map. Default to |
| using the physical address of the segment in the input BFD. */ |
| m->next = NULL; |
| m->p_type = p->p_type; |
| m->p_flags = p->p_flags; |
| m->p_flags_valid = 1; |
| m->p_paddr = p->p_paddr; |
| m->p_paddr_valid = 1; |
| |
| /* Determine if this segment contains the ELF file header |
| and if it contains the program headers themselves. */ |
| m->includes_filehdr = (p->p_offset == 0 |
| && p->p_filesz >= iehdr->e_ehsize); |
| |
| m->includes_phdrs = 0; |
| |
| if (! phdr_included || p->p_type != PT_LOAD) |
| { |
| m->includes_phdrs = |
| (p->p_offset <= (bfd_vma) iehdr->e_phoff |
| && (p->p_offset + p->p_filesz |
| >= ((bfd_vma) iehdr->e_phoff |
| + iehdr->e_phnum * iehdr->e_phentsize))); |
| if (p->p_type == PT_LOAD && m->includes_phdrs) |
| phdr_included = true; |
| } |
| |
| if (csecs == 0) |
| { |
| /* Special segments, such as the PT_PHDR segment, may contain |
| no sections, but ordinary, loadable segments should contain |
| something. */ |
| |
| if (p->p_type == PT_LOAD) |
| _bfd_error_handler |
| (_("%s: warning: Empty loadable segment detected\n"), |
| bfd_get_filename (ibfd)); |
| |
| m->count = 0; |
| *pm = m; |
| pm = &m->next; |
| |
| continue; |
| } |
| |
| /* Now scan the sections in the input BFD again and attempt |
| to add their corresponding output sections to the segment map. |
| The problem here is how to handle an output section which has |
| been moved (ie had its LMA changed). There are four possibilities: |
| |
| 1. None of the sections have been moved. |
| In this case we can continue to use the segment LMA from the |
| input BFD. |
| |
| 2. All of the sections have been moved by the same amount. |
| In this case we can change the segment's LMA to match the LMA |
| of the first section. |
| |
| 3. Some of the sections have been moved, others have not. |
| In this case those sections which have not been moved can be |
| placed in the current segment which will have to have its size, |
| and possibly its LMA changed, and a new segment or segments will |
| have to be created to contain the other sections. |
| |
| 4. The sections have been moved, but not be the same amount. |
| In this case we can change the segment's LMA to match the LMA |
| of the first section and we will have to create a new segment |
| or segments to contain the other sections. |
| |
| In order to save time, we allocate an array to hold the section |
| pointers that we are interested in. As these sections get assigned |
| to a segment, they are removed from this array. */ |
| |
| sections = (asection **) bfd_malloc (sizeof (asection *) * csecs); |
| if (sections == NULL) |
| return false; |
| |
| /* Step One: Scan for segment vs section LMA conflicts. |
| Also add the sections to the section array allocated above. |
| Also add the sections to the current segment. In the common |
| case, where the sections have not been moved, this means that |
| we have completely filled the segment, and there is nothing |
| more to do. */ |
| |
| isec = 0; |
| matching_lma = false; |
| suggested_lma = 0; |
| |
| for (j = 0, s = ibfd->sections; s != NULL; s = s->next) |
| { |
| os = s->output_section; |
| |
| if ((((IS_CONTAINED_BY (s->vma, s->_raw_size, p->p_vaddr, p) |
| || IS_SOLARIS_PT_INTERP (p, s)) |
| && (s->flags & SEC_ALLOC) != 0) |
| || IS_COREFILE_NOTE (p, s)) |
| && os != NULL) |
| { |
| sections[j++] = s; |
| |
| /* The Solaris native linker always sets p_paddr to 0. |
| We try to catch that case here, and set it to the |
| correct value. */ |
| if (p->p_paddr == 0 |
| && p->p_vaddr != 0 |
| && isec == 0 |
| && os->lma != 0 |
| && (os->vma == (p->p_vaddr |
| + (m->includes_filehdr |
| ? iehdr->e_ehsize |
| : 0) |
| + (m->includes_phdrs |
| ? iehdr->e_phnum * iehdr->e_phentsize |
| : 0)))) |
| m->p_paddr = p->p_vaddr; |
| |
| /* Match up the physical address of the segment with the |
| LMA address of the output section. */ |
| if (IS_CONTAINED_BY (os->lma, os->_raw_size, m->p_paddr, p) |
| || IS_COREFILE_NOTE (p, s)) |
| { |
| if (matching_lma == 0) |
| matching_lma = os->lma; |
| |
| /* We assume that if the section fits within the segment |
| that it does not overlap any other section within that |
| segment. */ |
| m->sections[isec++] = os; |
| } |
| else if (suggested_lma == 0) |
| suggested_lma = os->lma; |
| } |
| } |
| |
| BFD_ASSERT (j == csecs); |
| |
| /* Step Two: Adjust the physical address of the current segment, |
| if necessary. */ |
| if (isec == csecs) |
| { |
| /* All of the sections fitted within the segment as currently |
| specified. This is the default case. Add the segment to |
| the list of built segments and carry on to process the next |
| program header in the input BFD. */ |
| m->count = csecs; |
| *pm = m; |
| pm = &m->next; |
| |
| free (sections); |
| continue; |
| } |
| else if (matching_lma != 0) |
| { |
| /* At least one section fits inside the current segment. |
| Keep it, but modify its physical address to match the |
| LMA of the first section that fitted. */ |
| |
| m->p_paddr = matching_lma; |
| } |
| else |
| { |
| /* None of the sections fitted inside the current segment. |
| Change the current segment's physical address to match |
| the LMA of the first section. */ |
| |
| m->p_paddr = suggested_lma; |
| } |
| |
| /* Step Three: Loop over the sections again, this time assigning |
| those that fit to the current segment and remvoing them from the |
| sections array; but making sure not to leave large gaps. Once all |
| possible sections have been assigned to the current segment it is |
| added to the list of built segments and if sections still remain |
| to be assigned, a new segment is constructed before repeating |
| the loop. */ |
| isec = 0; |
| do |
| { |
| m->count = 0; |
| suggested_lma = 0; |
| |
| /* Fill the current segment with sections that fit. */ |
| for (j = 0; j < csecs; j++) |
| { |
| s = sections[j]; |
| |
| if (s == NULL) |
| continue; |
| |
| os = s->output_section; |
| |
| if (IS_CONTAINED_BY (os->lma, os->_raw_size, m->p_paddr, p) |
| || IS_COREFILE_NOTE (p, s)) |
| { |
| if (m->count == 0) |
| { |
| /* If the first section in a segment does not start at |
| the beginning of the segment, then something is wrong. */ |
| if (os->lma != m->p_paddr) |
| abort (); |
| } |
| else |
| { |
| asection * prev_sec; |
| bfd_vma maxpagesize; |
| |
| prev_sec = m->sections[m->count - 1]; |
| maxpagesize = get_elf_backend_data (obfd)->maxpagesize; |
| |
| /* If the gap between the end of the previous section |
| and the start of this section is more than maxpagesize |
| then we need to start a new segment. */ |
| if (BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size, maxpagesize) |
| < BFD_ALIGN (os->lma, maxpagesize)) |
| { |
| if (suggested_lma == 0) |
| suggested_lma = os->lma; |
| |
| continue; |
| } |
| } |
| |
| m->sections[m->count++] = os; |
| ++isec; |
| sections[j] = NULL; |
| } |
| else if (suggested_lma == 0) |
| suggested_lma = os->lma; |
| } |
| |
| BFD_ASSERT (m->count > 0); |
| |
| /* Add the current segment to the list of built segments. */ |
| *pm = m; |
| pm = &m->next; |
| |
| if (isec < csecs) |
| { |
| /* We still have not allocated all of the sections to |
| segments. Create a new segment here, initialise it |
| and carry on looping. */ |
| |
| m = ((struct elf_segment_map *) |
| bfd_alloc (obfd, |
| (sizeof (struct elf_segment_map) |
| + ((size_t) csecs - 1) * sizeof (asection *)))); |
| if (m == NULL) |
| return false; |
| |
| /* Initialise the fields of the segment map. Set the physical |
| physical address to the LMA of the first section that has |
| not yet been assigned. */ |
| |
| m->next = NULL; |
| m->p_type = p->p_type; |
| m->p_flags = p->p_flags; |
| m->p_flags_valid = 1; |
| m->p_paddr = suggested_lma; |
| m->p_paddr_valid = 1; |
| m->includes_filehdr = 0; |
| m->includes_phdrs = 0; |
| } |
| } |
| while (isec < csecs); |
| |
| free (sections); |
| } |
| |
| /* The Solaris linker creates program headers in which all the |
| p_paddr fields are zero. When we try to objcopy or strip such a |
| file, we get confused. Check for this case, and if we find it |
| reset the p_paddr_valid fields. */ |
| for (m = mfirst; m != NULL; m = m->next) |
| if (m->p_paddr != 0) |
| break; |
| if (m == NULL) |
| { |
| for (m = mfirst; m != NULL; m = m->next) |
| m->p_paddr_valid = 0; |
| } |
| |
| elf_tdata (obfd)->segment_map = mfirst; |
| |
| #if 0 |
| /* Final Step: Sort the segments into ascending order of physical address. */ |
| if (mfirst != NULL) |
| { |
| struct elf_segment_map* prev; |
| |
| prev = mfirst; |
| for (m = mfirst->next; m != NULL; prev = m, m = m->next) |
| { |
| /* Yes I know - its a bubble sort....*/ |
| if (m->next != NULL && (m->next->p_paddr < m->p_paddr)) |
| { |
| /* swap m and m->next */ |
| prev->next = m->next; |
| m->next = m->next->next; |
| prev->next->next = m; |
| |
| /* restart loop. */ |
| m = mfirst; |
| } |
| } |
| } |
| #endif |
| |
| #undef IS_CONTAINED_BY |
| #undef IS_SOLARIS_PT_INTERP |
| #undef IS_COREFILE_NOTE |
| return true; |
| } |
| |
| /* Copy private section information. This copies over the entsize |
| field, and sometimes the info field. */ |
| |
| boolean |
| _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec) |
| bfd *ibfd; |
| asection *isec; |
| bfd *obfd; |
| asection *osec; |
| { |
| Elf_Internal_Shdr *ihdr, *ohdr; |
| |
| if (ibfd->xvec->flavour != bfd_target_elf_flavour |
| || obfd->xvec->flavour != bfd_target_elf_flavour) |
| return true; |
| |
| /* Copy over private BFD data if it has not already been copied. |
| This must be done here, rather than in the copy_private_bfd_data |
| entry point, because the latter is called after the section |
| contents have been set, which means that the program headers have |
| already been worked out. */ |
| if (elf_tdata (obfd)->segment_map == NULL |
| && elf_tdata (ibfd)->phdr != NULL) |
| { |
| asection *s; |
| |
| /* Only set up the segments if there are no more SEC_ALLOC |
| sections. FIXME: This won't do the right thing if objcopy is |
| used to remove the last SEC_ALLOC section, since objcopy |
| won't call this routine in that case. */ |
| for (s = isec->next; s != NULL; s = s->next) |
| if ((s->flags & SEC_ALLOC) != 0) |
| break; |
| if (s == NULL) |
| { |
| if (! copy_private_bfd_data (ibfd, obfd)) |
| return false; |
| } |
| } |
| |
| ihdr = &elf_section_data (isec)->this_hdr; |
| ohdr = &elf_section_data (osec)->this_hdr; |
| |
| ohdr->sh_entsize = ihdr->sh_entsize; |
| |
| if (ihdr->sh_type == SHT_SYMTAB |
| || ihdr->sh_type == SHT_DYNSYM |
| || ihdr->sh_type == SHT_GNU_verneed |
| || ihdr->sh_type == SHT_GNU_verdef) |
| ohdr->sh_info = ihdr->sh_info; |
| |
| elf_section_data (osec)->use_rela_p |
| = elf_section_data (isec)->use_rela_p; |
| |
| return true; |
| } |
| |
| /* Copy private symbol information. If this symbol is in a section |
| which we did not map into a BFD section, try to map the section |
| index correctly. We use special macro definitions for the mapped |
| section indices; these definitions are interpreted by the |
| swap_out_syms function. */ |
| |
| #define MAP_ONESYMTAB (SHN_LORESERVE - 1) |
| #define MAP_DYNSYMTAB (SHN_LORESERVE - 2) |
| #define MAP_STRTAB (SHN_LORESERVE - 3) |
| #define MAP_SHSTRTAB (SHN_LORESERVE - 4) |
| |
| boolean |
| _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg) |
| bfd *ibfd; |
| asymbol *isymarg; |
| bfd *obfd; |
| asymbol *osymarg; |
| { |
| elf_symbol_type *isym, *osym; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| return true; |
| |
| isym = elf_symbol_from (ibfd, isymarg); |
| osym = elf_symbol_from (obfd, osymarg); |
| |
| if (isym != NULL |
| && osym != NULL |
| && bfd_is_abs_section (isym->symbol.section)) |
| { |
| unsigned int shndx; |
| |
| shndx = isym->internal_elf_sym.st_shndx; |
| if (shndx == elf_onesymtab (ibfd)) |
| shndx = MAP_ONESYMTAB; |
| else if (shndx == elf_dynsymtab (ibfd)) |
| shndx = MAP_DYNSYMTAB; |
| else if (shndx == elf_tdata (ibfd)->strtab_section) |
| shndx = MAP_STRTAB; |
| else if (shndx == elf_tdata (ibfd)->shstrtab_section) |
| shndx = MAP_SHSTRTAB; |
| osym->internal_elf_sym.st_shndx = shndx; |
| } |
| |
| return true; |
| } |
| |
| /* Swap out the symbols. */ |
| |
| static boolean |
| swap_out_syms (abfd, sttp, relocatable_p) |
| bfd *abfd; |
| struct bfd_strtab_hash **sttp; |
| int relocatable_p; |
| { |
| struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| |
| if (!elf_map_symbols (abfd)) |
| return false; |
| |
| /* Dump out the symtabs. */ |
| { |
| int symcount = bfd_get_symcount (abfd); |
| asymbol **syms = bfd_get_outsymbols (abfd); |
| struct bfd_strtab_hash *stt; |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Shdr *symstrtab_hdr; |
| char *outbound_syms; |
| int idx; |
| |
| stt = _bfd_elf_stringtab_init (); |
| if (stt == NULL) |
| return false; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| symtab_hdr->sh_type = SHT_SYMTAB; |
| symtab_hdr->sh_entsize = bed->s->sizeof_sym; |
| symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); |
| symtab_hdr->sh_info = elf_num_locals (abfd) + 1; |
| symtab_hdr->sh_addralign = bed->s->file_align; |
| |
| symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; |
| symstrtab_hdr->sh_type = SHT_STRTAB; |
| |
| outbound_syms = bfd_alloc (abfd, |
| (1 + symcount) * bed->s->sizeof_sym); |
| if (outbound_syms == NULL) |
| return false; |
| symtab_hdr->contents = (PTR) outbound_syms; |
| |
| /* now generate the data (for "contents") */ |
| { |
| /* Fill in zeroth symbol and swap it out. */ |
| Elf_Internal_Sym sym; |
| sym.st_name = 0; |
| sym.st_value = 0; |
| sym.st_size = 0; |
| sym.st_info = 0; |
| sym.st_other = 0; |
| sym.st_shndx = SHN_UNDEF; |
| bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); |
| outbound_syms += bed->s->sizeof_sym; |
| } |
| for (idx = 0; idx < symcount; idx++) |
| { |
| Elf_Internal_Sym sym; |
| bfd_vma value = syms[idx]->value; |
| elf_symbol_type *type_ptr; |
| flagword flags = syms[idx]->flags; |
| int type; |
| |
| if (flags & BSF_SECTION_SYM) |
| /* Section symbols have no names. */ |
| sym.st_name = 0; |
| else |
| { |
| sym.st_name = (unsigned long) _bfd_stringtab_add (stt, |
| syms[idx]->name, |
| true, false); |
| if (sym.st_name == (unsigned long) -1) |
| return false; |
| } |
| |
| type_ptr = elf_symbol_from (abfd, syms[idx]); |
| |
| if ((flags & BSF_SECTION_SYM) == 0 |
| && bfd_is_com_section (syms[idx]->section)) |
| { |
| /* ELF common symbols put the alignment into the `value' field, |
| and the size into the `size' field. This is backwards from |
| how BFD handles it, so reverse it here. */ |
| sym.st_size = value; |
| if (type_ptr == NULL |
| || type_ptr->internal_elf_sym.st_value == 0) |
| sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value)); |
| else |
| sym.st_value = type_ptr->internal_elf_sym.st_value; |
| sym.st_shndx = _bfd_elf_section_from_bfd_section |
| (abfd, syms[idx]->section); |
| } |
| else |
| { |
| asection *sec = syms[idx]->section; |
| int shndx; |
| |
| if (sec->output_section) |
| { |
| value += sec->output_offset; |
| sec = sec->output_section; |
| } |
| /* Don't add in the section vma for relocatable output. */ |
| if (! relocatable_p) |
| value += sec->vma; |
| sym.st_value = value; |
| sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; |
| |
| if (bfd_is_abs_section (sec) |
| && type_ptr != NULL |
| && type_ptr->internal_elf_sym.st_shndx != 0) |
| { |
| /* This symbol is in a real ELF section which we did |
| not create as a BFD section. Undo the mapping done |
| by copy_private_symbol_data. */ |
| shndx = type_ptr->internal_elf_sym.st_shndx; |
| switch (shndx) |
| { |
| case MAP_ONESYMTAB: |
| shndx = elf_onesymtab (abfd); |
| break; |
| case MAP_DYNSYMTAB: |
| shndx = elf_dynsymtab (abfd); |
| break; |
| case MAP_STRTAB: |
| shndx = elf_tdata (abfd)->strtab_section; |
| break; |
| case MAP_SHSTRTAB: |
| shndx = elf_tdata (abfd)->shstrtab_section; |
| break; |
| default: |
| break; |
| } |
| } |
| else |
| { |
| shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| |
| if (shndx == -1) |
| { |
| asection *sec2; |
| |
| /* Writing this would be a hell of a lot easier if |
| we had some decent documentation on bfd, and |
| knew what to expect of the library, and what to |
| demand of applications. For example, it |
| appears that `objcopy' might not set the |
| section of a symbol to be a section that is |
| actually in the output file. */ |
| sec2 = bfd_get_section_by_name (abfd, sec->name); |
| BFD_ASSERT (sec2 != 0); |
| shndx = _bfd_elf_section_from_bfd_section (abfd, sec2); |
| BFD_ASSERT (shndx != -1); |
| } |
| } |
| |
| sym.st_shndx = shndx; |
| } |
| |
| if ((flags & BSF_FUNCTION) != 0) |
| type = STT_FUNC; |
| else if ((flags & BSF_OBJECT) != 0) |
| type = STT_OBJECT; |
| else |
| type = STT_NOTYPE; |
| |
| /* Processor-specific types */ |
| if (bed->elf_backend_get_symbol_type) |
| type = (*bed->elf_backend_get_symbol_type) (&type_ptr->internal_elf_sym, type); |
| |
| if (flags & BSF_SECTION_SYM) |
| sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| else if (bfd_is_com_section (syms[idx]->section)) |
| sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); |
| else if (bfd_is_und_section (syms[idx]->section)) |
| sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK) |
| ? STB_WEAK |
| : STB_GLOBAL), |
| type); |
| else if (flags & BSF_FILE) |
| sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); |
| else |
| { |
| int bind = STB_LOCAL; |
| |
| if (flags & BSF_LOCAL) |
| bind = STB_LOCAL; |
| else if (flags & BSF_WEAK) |
| bind = STB_WEAK; |
| else if (flags & BSF_GLOBAL) |
| bind = STB_GLOBAL; |
| |
| sym.st_info = ELF_ST_INFO (bind, type); |
| } |
| |
| if (type_ptr != NULL) |
| sym.st_other = type_ptr->internal_elf_sym.st_other; |
| else |
| sym.st_other = 0; |
| |
| bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); |
| outbound_syms += bed->s->sizeof_sym; |
| } |
| |
| *sttp = stt; |
| symstrtab_hdr->sh_size = _bfd_stringtab_size (stt); |
| symstrtab_hdr->sh_type = SHT_STRTAB; |
| |
| symstrtab_hdr->sh_flags = 0; |
| symstrtab_hdr->sh_addr = 0; |
| symstrtab_hdr->sh_entsize = 0; |
| symstrtab_hdr->sh_link = 0; |
| symstrtab_hdr->sh_info = 0; |
| symstrtab_hdr->sh_addralign = 1; |
| } |
| |
| return true; |
| } |
| |
| /* Return the number of bytes required to hold the symtab vector. |
| |
| Note that we base it on the count plus 1, since we will null terminate |
| the vector allocated based on this size. However, the ELF symbol table |
| always has a dummy entry as symbol #0, so it ends up even. */ |
| |
| long |
| _bfd_elf_get_symtab_upper_bound (abfd) |
| bfd *abfd; |
| { |
| long symcount; |
| long symtab_size; |
| Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; |
| |
| symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; |
| symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); |
| |
| return symtab_size; |
| } |
| |
| long |
| _bfd_elf_get_dynamic_symtab_upper_bound (abfd) |
| bfd *abfd; |
| { |
| long symcount; |
| long symtab_size; |
| Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; |
| |
| if (elf_dynsymtab (abfd) == 0) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return -1; |
| } |
| |
| symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; |
| symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); |
| |
| return symtab_size; |
| } |
| |
| long |
| _bfd_elf_get_reloc_upper_bound (abfd, asect) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| sec_ptr asect; |
| { |
| return (asect->reloc_count + 1) * sizeof (arelent *); |
| } |
| |
| /* Canonicalize the relocs. */ |
| |
| long |
| _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols) |
| bfd *abfd; |
| sec_ptr section; |
| arelent **relptr; |
| asymbol **symbols; |
| { |
| arelent *tblptr; |
| unsigned int i; |
| |
| if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd, |
| section, |
| symbols, |
| false)) |
| return -1; |
| |
| tblptr = section->relocation; |
| for (i = 0; i < section->reloc_count; i++) |
| *relptr++ = tblptr++; |
| |
| *relptr = NULL; |
| |
| return section->reloc_count; |
| } |
| |
| long |
| _bfd_elf_get_symtab (abfd, alocation) |
| bfd *abfd; |
| asymbol **alocation; |
| { |
| long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table |
| (abfd, alocation, false); |
| |
| if (symcount >= 0) |
| bfd_get_symcount (abfd) = symcount; |
| return symcount; |
| } |
| |
| long |
| _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation) |
| bfd *abfd; |
| asymbol **alocation; |
| { |
| return get_elf_backend_data (abfd)->s->slurp_symbol_table |
| (abfd, alocation, true); |
| } |
| |
| /* Return the size required for the dynamic reloc entries. Any |
| section that was actually installed in the BFD, and has type |
| SHT_REL or SHT_RELA, and uses the dynamic symbol table, is |
| considered to be a dynamic reloc section. */ |
| |
| long |
| _bfd_elf_get_dynamic_reloc_upper_bound (abfd) |
| bfd *abfd; |
| { |
| long ret; |
| asection *s; |
| |
| if (elf_dynsymtab (abfd) == 0) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return -1; |
| } |
| |
| ret = sizeof (arelent *); |
| for (s = abfd->sections; s != NULL; s = s->next) |
| if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) |
| && (elf_section_data (s)->this_hdr.sh_type == SHT_REL |
| || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) |
| ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize) |
| * sizeof (arelent *)); |
| |
| return ret; |
| } |
| |
| /* Canonicalize the dynamic relocation entries. Note that we return |
| the dynamic relocations as a single block, although they are |
| actually associated with particular sections; the interface, which |
| was designed for SunOS style shared libraries, expects that there |
| is only one set of dynamic relocs. Any section that was actually |
| installed in the BFD, and has type SHT_REL or SHT_RELA, and uses |
| the dynamic symbol table, is considered to be a dynamic reloc |
| section. */ |
| |
| long |
| _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms) |
| bfd *abfd; |
| arelent **storage; |
| asymbol **syms; |
| { |
| boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean)); |
| asection *s; |
| long ret; |
| |
| if (elf_dynsymtab (abfd) == 0) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return -1; |
| } |
| |
| slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| ret = 0; |
| for (s = abfd->sections; s != NULL; s = s->next) |
| { |
| if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) |
| && (elf_section_data (s)->this_hdr.sh_type == SHT_REL |
| || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) |
| { |
| arelent *p; |
| long count, i; |
| |
| if (! (*slurp_relocs) (abfd, s, syms, true)) |
| return -1; |
| count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize; |
| p = s->relocation; |
| for (i = 0; i < count; i++) |
| *storage++ = p++; |
| ret += count; |
| } |
| } |
| |
| *storage = NULL; |
| |
| return ret; |
| } |
| |
| /* Read in the version information. */ |
| |
| boolean |
| _bfd_elf_slurp_version_tables (abfd) |
| bfd *abfd; |
| { |
| bfd_byte *contents = NULL; |
| |
| if (elf_dynverdef (abfd) != 0) |
| { |
| Elf_Internal_Shdr *hdr; |
| Elf_External_Verdef *everdef; |
| Elf_Internal_Verdef *iverdef; |
| unsigned int i; |
| |
| hdr = &elf_tdata (abfd)->dynverdef_hdr; |
| |
| elf_tdata (abfd)->verdef = |
| ((Elf_Internal_Verdef *) |
| bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verdef))); |
| if (elf_tdata (abfd)->verdef == NULL) |
| goto error_return; |
| |
| elf_tdata (abfd)->cverdefs = hdr->sh_info; |
| |
| contents = (bfd_byte *) bfd_malloc (hdr->sh_size); |
| if (contents == NULL) |
| goto error_return; |
| if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 |
| || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size) |
| goto error_return; |
| |
| everdef = (Elf_External_Verdef *) contents; |
| iverdef = elf_tdata (abfd)->verdef; |
| for (i = 0; i < hdr->sh_info; i++, iverdef++) |
| { |
| Elf_External_Verdaux *everdaux; |
| Elf_Internal_Verdaux *iverdaux; |
| unsigned int j; |
| |
| _bfd_elf_swap_verdef_in (abfd, everdef, iverdef); |
| |
| iverdef->vd_bfd = abfd; |
| |
| iverdef->vd_auxptr = ((Elf_Internal_Verdaux *) |
| bfd_alloc (abfd, |
| (iverdef->vd_cnt |
| * sizeof (Elf_Internal_Verdaux)))); |
| if (iverdef->vd_auxptr == NULL) |
| goto error_return; |
| |
| everdaux = ((Elf_External_Verdaux *) |
| ((bfd_byte *) everdef + iverdef->vd_aux)); |
| iverdaux = iverdef->vd_auxptr; |
| for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++) |
| { |
| _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux); |
| |
| iverdaux->vda_nodename = |
| bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
| iverdaux->vda_name); |
| if (iverdaux->vda_nodename == NULL) |
| goto error_return; |
| |
| if (j + 1 < iverdef->vd_cnt) |
| iverdaux->vda_nextptr = iverdaux + 1; |
| else |
| iverdaux->vda_nextptr = NULL; |
| |
| everdaux = ((Elf_External_Verdaux *) |
| ((bfd_byte *) everdaux + iverdaux->vda_next)); |
| } |
| |
| iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename; |
| |
| if (i + 1 < hdr->sh_info) |
| iverdef->vd_nextdef = iverdef + 1; |
| else |
| iverdef->vd_nextdef = NULL; |
| |
| everdef = ((Elf_External_Verdef *) |
| ((bfd_byte *) everdef + iverdef->vd_next)); |
| } |
| |
| free (contents); |
| contents = NULL; |
| } |
| |
| if (elf_dynverref (abfd) != 0) |
| { |
| Elf_Internal_Shdr *hdr; |
| Elf_External_Verneed *everneed; |
| Elf_Internal_Verneed *iverneed; |
| unsigned int i; |
| |
| hdr = &elf_tdata (abfd)->dynverref_hdr; |
| |
| elf_tdata (abfd)->verref = |
| ((Elf_Internal_Verneed *) |
| bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed))); |
| if (elf_tdata (abfd)->verref == NULL) |
| goto error_return; |
| |
| elf_tdata (abfd)->cverrefs = hdr->sh_info; |
| |
| contents = (bfd_byte *) bfd_malloc (hdr->sh_size); |
| if (contents == NULL) |
| goto error_return; |
| if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 |
| || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size) |
| goto error_return; |
| |
| everneed = (Elf_External_Verneed *) contents; |
| iverneed = elf_tdata (abfd)->verref; |
| for (i = 0; i < hdr->sh_info; i++, iverneed++) |
| { |
| Elf_External_Vernaux *evernaux; |
| Elf_Internal_Vernaux *ivernaux; |
| unsigned int j; |
| |
| _bfd_elf_swap_verneed_in (abfd, everneed, iverneed); |
| |
| iverneed->vn_bfd = abfd; |
| |
| iverneed->vn_filename = |
| bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
| iverneed->vn_file); |
| if (iverneed->vn_filename == NULL) |
| goto error_return; |
| |
| iverneed->vn_auxptr = |
| ((Elf_Internal_Vernaux *) |
| bfd_alloc (abfd, |
| iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux))); |
| |
| evernaux = ((Elf_External_Vernaux *) |
| ((bfd_byte *) everneed + iverneed->vn_aux)); |
| ivernaux = iverneed->vn_auxptr; |
| for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++) |
| { |
| _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux); |
| |
| ivernaux->vna_nodename = |
| bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
| ivernaux->vna_name); |
| if (ivernaux->vna_nodename == NULL) |
| goto error_return; |
| |
| if (j + 1 < iverneed->vn_cnt) |
| ivernaux->vna_nextptr = ivernaux + 1; |
| else |
| ivernaux->vna_nextptr = NULL; |
| |
| evernaux = ((Elf_External_Vernaux *) |
| ((bfd_byte *) evernaux + ivernaux->vna_next)); |
| } |
| |
| if (i + 1 < hdr->sh_info) |
| iverneed->vn_nextref = iverneed + 1; |
| else |
| iverneed->vn_nextref = NULL; |
| |
| everneed = ((Elf_External_Verneed *) |
| ((bfd_byte *) everneed + iverneed->vn_next)); |
| } |
| |
| free (contents); |
| contents = NULL; |
| } |
| |
| return true; |
| |
| error_return: |
| if (contents == NULL) |
| free (contents); |
| return false; |
| } |
| |
| asymbol * |
| _bfd_elf_make_empty_symbol (abfd) |
| bfd *abfd; |
| { |
| elf_symbol_type *newsym; |
| |
| newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); |
| if (!newsym) |
| return NULL; |
| else |
| { |
| newsym->symbol.the_bfd = abfd; |
| return &newsym->symbol; |
| } |
| } |
| |
| void |
| _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret) |
| bfd *ignore_abfd ATTRIBUTE_UNUSED; |
| asymbol *symbol; |
| symbol_info *ret; |
| { |
| bfd_symbol_info (symbol, ret); |
| } |
| |
| /* Return whether a symbol name implies a local symbol. Most targets |
| use this function for the is_local_label_name entry point, but some |
| override it. */ |
| |
| boolean |
| _bfd_elf_is_local_label_name (abfd, name) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| const char *name; |
| { |
| /* Normal local symbols start with ``.L''. */ |
| if (name[0] == '.' && name[1] == 'L') |
| return true; |
| |
| /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate |
| DWARF debugging symbols starting with ``..''. */ |
| if (name[0] == '.' && name[1] == '.') |
| return true; |
| |
| /* gcc will sometimes generate symbols beginning with ``_.L_'' when |
| emitting DWARF debugging output. I suspect this is actually a |
| small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call |
| ASM_GENERATE_INTERNAL_LABEL, and this causes the leading |
| underscore to be emitted on some ELF targets). For ease of use, |
| we treat such symbols as local. */ |
| if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_') |
| return true; |
| |
| return false; |
| } |
| |
| alent * |
| _bfd_elf_get_lineno (ignore_abfd, symbol) |
| bfd *ignore_abfd ATTRIBUTE_UNUSED; |
| asymbol *symbol ATTRIBUTE_UNUSED; |
| { |
| abort (); |
| return NULL; |
| } |
| |
| boolean |
| _bfd_elf_set_arch_mach (abfd, arch, machine) |
| bfd *abfd; |
| enum bfd_architecture arch; |
| unsigned long machine; |
| { |
| /* If this isn't the right architecture for this backend, and this |
| isn't the generic backend, fail. */ |
| if (arch != get_elf_backend_data (abfd)->arch |
| && arch != bfd_arch_unknown |
| && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) |
| return false; |
| |
| return bfd_default_set_arch_mach (abfd, arch, machine); |
| } |
| |
| /* Find the nearest line to a particular section and offset, for error |
| reporting. */ |
| |
| boolean |
| _bfd_elf_find_nearest_line (abfd, |
| section, |
| symbols, |
| offset, |
| filename_ptr, |
| functionname_ptr, |
| line_ptr) |
| bfd *abfd; |
| asection *section; |
| asymbol **symbols; |
| bfd_vma offset; |
| CONST char **filename_ptr; |
| CONST char **functionname_ptr; |
| unsigned int *line_ptr; |
| { |
| boolean found; |
| const char *filename; |
| asymbol *func; |
| bfd_vma low_func; |
| asymbol **p; |
| |
| if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset, |
| filename_ptr, functionname_ptr, |
| line_ptr)) |
| return true; |
| |
| if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
| filename_ptr, functionname_ptr, |
| line_ptr, 0)) |
| return true; |
| |
| if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| &found, filename_ptr, |
| functionname_ptr, line_ptr, |
| &elf_tdata (abfd)->line_info)) |
| return false; |
| if (found) |
| return true; |
| |
| if (symbols == NULL) |
| return false; |
| |
| filename = NULL; |
| func = NULL; |
| low_func = 0; |
| |
| for (p = symbols; *p != NULL; p++) |
| { |
| elf_symbol_type *q; |
| |
| q = (elf_symbol_type *) *p; |
| |
| if (bfd_get_section (&q->symbol) != section) |
| continue; |
| |
| switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| { |
| default: |
| break; |
| case STT_FILE: |
| filename = bfd_asymbol_name (&q->symbol); |
| break; |
| case STT_NOTYPE: |
| case STT_FUNC: |
| if (q->symbol.section == section |
| && q->symbol.value >= low_func |
| && q->symbol.value <= offset) |
| { |
| func = (asymbol *) q; |
| low_func = q->symbol.value; |
| } |
| break; |
| } |
| } |
| |
| if (func == NULL) |
| return false; |
| |
| *filename_ptr = filename; |
| *functionname_ptr = bfd_asymbol_name (func); |
| *line_ptr = 0; |
| return true; |
| } |
| |
| int |
| _bfd_elf_sizeof_headers (abfd, reloc) |
| bfd *abfd; |
| boolean reloc; |
| { |
| int ret; |
| |
| ret = get_elf_backend_data (abfd)->s->sizeof_ehdr; |
| if (! reloc) |
| ret += get_program_header_size (abfd); |
| return ret; |
| } |
| |
| boolean |
| _bfd_elf_set_section_contents (abfd, section, location, offset, count) |
| bfd *abfd; |
| sec_ptr section; |
| PTR location; |
| file_ptr offset; |
| bfd_size_type count; |
| { |
| Elf_Internal_Shdr *hdr; |
| |
| if (! abfd->output_has_begun |
| && ! _bfd_elf_compute_section_file_positions |
| (abfd, (struct bfd_link_info *) NULL)) |
| return false; |
| |
| hdr = &elf_section_data (section)->this_hdr; |
| |
| if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
| return false; |
| if (bfd_write (location, 1, count, abfd) != count) |
| return false; |
| |
| return true; |
| } |
| |
| void |
| _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *cache_ptr ATTRIBUTE_UNUSED; |
| Elf_Internal_Rela *dst ATTRIBUTE_UNUSED; |
| { |
| abort (); |
| } |
| |
| #if 0 |
| void |
| _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst) |
| bfd *abfd; |
| arelent *cache_ptr; |
| Elf_Internal_Rel *dst; |
| { |
| abort (); |
| } |
| #endif |
| |
| /* Try to convert a non-ELF reloc into an ELF one. */ |
| |
| boolean |
| _bfd_elf_validate_reloc (abfd, areloc) |
| bfd *abfd; |
| arelent *areloc; |
| { |
| /* Check whether we really have an ELF howto. */ |
| |
| if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec) |
| { |
| bfd_reloc_code_real_type code; |
| reloc_howto_type *howto; |
| |
| /* Alien reloc: Try to determine its type to replace it with an |
| equivalent ELF reloc. */ |
| |
| if (areloc->howto->pc_relative) |
| { |
| switch (areloc->howto->bitsize) |
| { |
| case 8: |
| code = BFD_RELOC_8_PCREL; |
| break; |
| case 12: |
| code = BFD_RELOC_12_PCREL; |
| break; |
| case 16: |
| code = BFD_RELOC_16_PCREL; |
| break; |
| case 24: |
| code = BFD_RELOC_24_PCREL; |
| break; |
| case 32: |
| code = BFD_RELOC_32_PCREL; |
| break; |
| case 64: |
| code = BFD_RELOC_64_PCREL; |
| break; |
| default: |
| goto fail; |
| } |
| |
| howto = bfd_reloc_type_lookup (abfd, code); |
| |
| if (areloc->howto->pcrel_offset != howto->pcrel_offset) |
| { |
| if (howto->pcrel_offset) |
| areloc->addend += areloc->address; |
| else |
| areloc->addend -= areloc->address; /* addend is unsigned!! */ |
| } |
| } |
| else |
| { |
| switch (areloc->howto->bitsize) |
| { |
| case 8: |
| code = BFD_RELOC_8; |
| break; |
| case 14: |
| code = BFD_RELOC_14; |
| break; |
| case 16: |
| code = BFD_RELOC_16; |
| break; |
| case 26: |
| code = BFD_RELOC_26; |
| break; |
| case 32: |
| code = BFD_RELOC_32; |
| break; |
| case 64: |
| code = BFD_RELOC_64; |
| break; |
| default: |
| goto fail; |
| } |
| |
| howto = bfd_reloc_type_lookup (abfd, code); |
| } |
| |
| if (howto) |
| areloc->howto = howto; |
| else |
| goto fail; |
| } |
| |
| return true; |
| |
| fail: |
| (*_bfd_error_handler) |
| (_("%s: unsupported relocation type %s"), |
| bfd_get_filename (abfd), areloc->howto->name); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| boolean |
| _bfd_elf_close_and_cleanup (abfd) |
| bfd *abfd; |
| { |
| if (bfd_get_format (abfd) == bfd_object) |
| { |
| if (elf_shstrtab (abfd) != NULL) |
| _bfd_stringtab_free (elf_shstrtab (abfd)); |
| } |
| |
| return _bfd_generic_close_and_cleanup (abfd); |
| } |
| |
| /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY |
| in the relocation's offset. Thus we cannot allow any sort of sanity |
| range-checking to interfere. There is nothing else to do in processing |
| this reloc. */ |
| |
| bfd_reloc_status_type |
| _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *re ATTRIBUTE_UNUSED; |
| struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED; |
| PTR data ATTRIBUTE_UNUSED; |
| asection *is ATTRIBUTE_UNUSED; |
| bfd *obfd ATTRIBUTE_UNUSED; |
| char **errmsg ATTRIBUTE_UNUSED; |
| { |
| return bfd_reloc_ok; |
| } |
| |
| |
| /* Elf core file support. Much of this only works on native |
| toolchains, since we rely on knowing the |
| machine-dependent procfs structure in order to pick |
| out details about the corefile. */ |
| |
| #ifdef HAVE_SYS_PROCFS_H |
| # include <sys/procfs.h> |
| #endif |
| |
| |
| /* Define offsetof for those systems which lack it. */ |
| |
| #ifndef offsetof |
| # define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) |
| #endif |
| |
| |
| /* FIXME: this is kinda wrong, but it's what gdb wants. */ |
| |
| static int |
| elfcore_make_pid (abfd) |
| bfd* abfd; |
| { |
| return ((elf_tdata (abfd)->core_lwpid << 16) |
| + (elf_tdata (abfd)->core_pid)); |
| } |
| |
| |
| /* If there isn't a section called NAME, make one, using |
| data from SECT. Note, this function will generate a |
| reference to NAME, so you shouldn't deallocate or |
| overwrite it. */ |
| |
| static boolean |
| elfcore_maybe_make_sect (abfd, name, sect) |
| bfd* abfd; |
| char* name; |
| asection* sect; |
| { |
| asection* sect2; |
| |
| if (bfd_get_section_by_name (abfd, name) != NULL) |
| return true; |
| |
| sect2 = bfd_make_section (abfd, name); |
| if (sect2 == NULL) |
| return false; |
| |
| sect2->_raw_size = sect->_raw_size; |
| sect2->filepos = sect->filepos; |
| sect2->flags = sect->flags; |
| sect2->alignment_power = sect->alignment_power; |
| return true; |
| } |
| |
| |
| /* prstatus_t exists on: |
| solaris 2.[567] |
| linux 2.[01] + glibc |
| unixware 4.2 |
| */ |
| |
| #if defined (HAVE_PRSTATUS_T) |
| static boolean |
| elfcore_grok_prstatus (abfd, note) |
| bfd* abfd; |
| Elf_Internal_Note* note; |
| { |
| prstatus_t prstat; |
| char buf[100]; |
| char* name; |
| asection* sect; |
| |
| if (note->descsz != sizeof (prstat)) |
| return true; |
| |
| memcpy (&prstat, note->descdata, sizeof (prstat)); |
| |
| elf_tdata (abfd)->core_signal = prstat.pr_cursig; |
| elf_tdata (abfd)->core_pid = prstat.pr_pid; |
| |
| /* pr_who exists on: |
| solaris 2.[567] |
| unixware 4.2 |
| pr_who doesn't exist on: |
| linux 2.[01] |
| */ |
| #if defined (HAVE_PRSTATUS_T_PR_WHO) |
| elf_tdata (abfd)->core_lwpid = prstat.pr_who; |
| #endif |
| |
| /* Make a ".reg/999" section. */ |
| |
| sprintf (buf, ".reg/%d", elfcore_make_pid (abfd)); |
| name = bfd_alloc (abfd, strlen (buf) + 1); |
| if (name == NULL) |
| return false; |
| strcpy (name, buf); |
| |
| sect = bfd_make_section (abfd, name); |
| if (sect == NULL) |
| return false; |
| sect->_raw_size = sizeof (prstat.pr_reg); |
| sect->filepos = note->descpos + offsetof (prstatus_t, pr_reg); |
| sect->flags = SEC_HAS_CONTENTS; |
| sect->alignment_power = 2; |
| |
| if (! elfcore_maybe_make_sect (abfd, ".reg", sect)) |
| return false; |
| |
| return true; |
| } |
| #endif /* defined (HAVE_PRSTATUS_T) */ |
| |
| |
| /* Create a pseudosection containing the exact contents of NOTE. This |
| actually creates up to two pseudosections: |
| - For the single-threaded case, a section named NAME, unless |
| such a section already exists. |
| - For the multi-threaded case, a section named "NAME/PID", where |
| PID is elfcore_make_pid (abfd). |
| Both pseudosections have identical contents: the contents of NOTE. */ |
| |
| static boolean |
| elfcore_make_note_pseudosection (abfd, name, note) |
| bfd* abfd; |
| char *name; |
| Elf_Internal_Note* note; |
| { |
| char buf[100]; |
| char *threaded_name; |
| asection* sect; |
| |
| /* Build the section name. */ |
| |
| sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd)); |
| threaded_name = bfd_alloc (abfd, strlen (buf) + 1); |
| if (threaded_name == NULL) |
| return false; |
| strcpy (threaded_name, buf); |
| |
| sect = bfd_make_section (abfd, threaded_name); |
| if (sect == NULL) |
| return false; |
| sect->_raw_size = note->descsz; |
| sect->filepos = note->descpos; |
| sect->flags = SEC_HAS_CONTENTS; |
| sect->alignment_power = 2; |
| |
| if (! elfcore_maybe_make_sect (abfd, name, sect)) |
| return false; |
| |
| return true; |
| } |
| |
| |
| /* There isn't a consistent prfpregset_t across platforms, |
| but it doesn't matter, because we don't have to pick this |
| data structure apart. */ |
| static boolean |
| elfcore_grok_prfpreg (abfd, note) |
| bfd* abfd; |
| Elf_Internal_Note* note; |
| { |
| return elfcore_make_note_pseudosection (abfd, ".reg2", note); |
| } |
| |
| |
| /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note |
| type of 5 (NT_PRXFPREG). Just include the whole note's contents |
| literally. */ |
| static boolean |
| elfcore_grok_prxfpreg (abfd, note) |
| bfd* abfd; |
| Elf_Internal_Note* note; |
| { |
| return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note); |
| } |
| |
| |
| #if defined (HAVE_PRPSINFO_T) |
| # define elfcore_psinfo_t prpsinfo_t |
| #endif |
| |
| #if defined (HAVE_PSINFO_T) |
| # define elfcore_psinfo_t psinfo_t |
| #endif |
| |
| |
| #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) |
| |
| /* return a malloc'ed copy of a string at START which is at |
| most MAX bytes long, possibly without a terminating '\0'. |
| the copy will always have a terminating '\0'. */ |
| |
| static char* |
| elfcore_strndup (abfd, start, max) |
| bfd* abfd; |
| char* start; |
| int max; |
| { |
| char* dup; |
| char* end = memchr (start, '\0', max); |
| int len; |
| |
| if (end == NULL) |
| len = max; |
| else |
| len = end - start; |
| |
| dup = bfd_alloc (abfd, len + 1); |
| if (dup == NULL) |
| return NULL; |
| |
| memcpy (dup, start, len); |
| dup[len] = '\0'; |
| |
| return dup; |
| } |
| |
| static boolean |
| elfcore_grok_psinfo (abfd, note) |
| bfd* abfd; |
| Elf_Internal_Note* note; |
| { |
| elfcore_psinfo_t psinfo; |
| |
| if (note->descsz != sizeof (elfcore_psinfo_t)) |
| return true; |
| |
| memcpy (&psinfo, note->descdata, note->descsz); |
| |
| elf_tdata (abfd)->core_program |
| = elfcore_strndup (abfd, psinfo.pr_fname, sizeof (psinfo.pr_fname)); |
| |
| elf_tdata (abfd)->core_command |
| = elfcore_strndup (abfd, psinfo.pr_psargs, sizeof (psinfo.pr_psargs)); |
| |
| /* Note that for some reason, a spurious space is tacked |
| onto the end of the args in some (at least one anyway) |
| implementations, so strip it off if it exists. */ |
| |
| { |
| char* command = elf_tdata (abfd)->core_command; |
| int n = strlen (command); |
| |
| if (0 < n && command[n - 1] == ' ') |
| command[n - 1] = '\0'; |
| } |
| |
| return true; |
| } |
| #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */ |
| |
| |
| #if defined (HAVE_PSTATUS_T) |
| static boolean |
| elfcore_grok_pstatus (abfd, note) |
| bfd* abfd; |
| Elf_Internal_Note* note; |
| { |
| pstatus_t pstat; |
| |
| if (note->descsz != sizeof (pstat)) |
| return true; |
| |
| memcpy (&pstat, note->descdata, sizeof (pstat)); |
| |
| elf_tdata (abfd)->core_pid = pstat.pr_pid; |
| |
| /* Could grab some more details from the "representative" |
| lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an |
| NT_LWPSTATUS note, presumably. */ |
| |
| return true; |
| } |
| #endif /* defined (HAVE_PSTATUS_T) */ |
| |
| |
| #if defined (HAVE_LWPSTATUS_T) |
| static boolean |
| elfcore_grok_lwpstatus (abfd, note) |
| bfd* abfd; |
| Elf_Internal_Note* note; |
| { |
| lwpstatus_t lwpstat; |
| char buf[100]; |
| char* name; |
| asection* sect; |
| |
| if (note->descsz != sizeof (lwpstat)) |
| return true; |
| |
| memcpy (&lwpstat, note->descdata, sizeof (lwpstat)); |
| |
| elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid; |
| elf_tdata (abfd)->core_signal = lwpstat.pr_cursig; |
| |
| /* Make a ".reg/999" section. */ |
| |
| sprintf (buf, ".reg/%d", elfcore_make_pid (abfd)); |
| name = bfd_alloc (abfd, strlen (buf) + 1); |
| if (name == NULL) |
| return false; |
| strcpy (name, buf); |
| |
| sect = bfd_make_section (abfd, name); |
| if (sect == NULL) |
| return false; |
| |
| #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) |
| sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs); |
| sect->filepos = note->descpos |
| + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs); |
| #endif |
| |
| #if defined (HAVE_LWPSTATUS_T_PR_REG) |
| sect->_raw_size = sizeof (lwpstat.pr_reg); |
| sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg); |
| #endif |
| |
| sect->flags = SEC_HAS_CONTENTS; |
| sect->alignment_power = 2; |
| |
| if (!elfcore_maybe_make_sect (abfd, ".reg", sect)) |
| return false; |
| |
| /* Make a ".reg2/999" section */ |
| |
| sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd)); |
| name = bfd_alloc (abfd, strlen (buf) + 1); |
| if (name == NULL) |
| return false; |
| strcpy (name, buf); |
| |
| sect = bfd_make_section (abfd, name); |
| if (sect == NULL) |
| return false; |
| |
| #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) |
| sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs); |
| sect->filepos = note->descpos |
| + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs); |
| #endif |
| |
| #if defined (HAVE_LWPSTATUS_T_PR_FPREG) |
| sect->_raw_size = sizeof (lwpstat.pr_fpreg); |
| sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg); |
| #endif |
| |
| sect->flags = SEC_HAS_CONTENTS; |
| sect->alignment_power = 2; |
| |
| if (!elfcore_maybe_make_sect (abfd, ".reg2", sect)) |
| return false; |
| |
| return true; |
| } |
| #endif /* defined (HAVE_LWPSTATUS_T) */ |
| |
| #if defined (HAVE_WIN32_PSTATUS_T) |
| static boolean |
| elfcore_grok_win32pstatus (abfd, note) |
| bfd * abfd; |
| Elf_Internal_Note * note; |
| { |
| char buf[30]; |
| char * name; |
| asection * sect; |
| win32_pstatus_t pstatus; |
| |
| if (note->descsz < sizeof (pstatus)) |
| return true; |
| |
| memcpy (& pstatus, note->descdata, note->descsz); |
| |
| switch (pstatus.data_type) |
| { |
| case NOTE_INFO_PROCESS: |
| /* FIXME: need to add ->core_command. */ |
| elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal; |
| elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid; |
| break ; |
| |
| case NOTE_INFO_THREAD: |
| /* Make a ".reg/999" section. */ |
| sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid); |
| |
| name = bfd_alloc (abfd, strlen (buf) + 1); |
| if (name == NULL) |
| return false; |
| |
| strcpy (name, buf); |
| |
| sect = bfd_make_section (abfd, name); |
| if (sect == NULL) |
| return false; |
| |
| sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context); |
| sect->filepos = note->descpos + offsetof (struct win32_pstatus, |
| data.thread_info.thread_context); |
| sect->flags = SEC_HAS_CONTENTS; |
| sect->alignment_power = 2; |
| |
| if (pstatus.data.thread_info.is_active_thread) |
| if (! elfcore_maybe_make_sect (abfd, ".reg", sect)) |
| return false; |
| break; |
| |
| case NOTE_INFO_MODULE: |
| /* Make a ".module/xxxxxxxx" section. */ |
| sprintf (buf, ".module/%08x" , pstatus.data.module_info.base_address); |
| |
| name = bfd_alloc (abfd, strlen (buf) + 1); |
| if (name == NULL) |
| return false; |
| |
| strcpy (name, buf); |
| |
| sect = bfd_make_section (abfd, name); |
| |
| if (sect == NULL) |
| return false; |
| |
| sect->_raw_size = note->descsz; |
| sect->filepos = note->descpos; |
| sect->flags = SEC_HAS_CONTENTS; |
| sect->alignment_power = 2; |
| break; |
| |
| default: |
| return true; |
| } |
| |
| return true; |
| } |
| #endif /* HAVE_WIN32_PSTATUS_T */ |
| |
| static boolean |
| elfcore_grok_note (abfd, note) |
| bfd* abfd; |
| Elf_Internal_Note* note; |
| { |
| switch (note->type) |
| { |
| default: |
| return true; |
| |
| #if defined (HAVE_PRSTATUS_T) |
| case NT_PRSTATUS: |
| return elfcore_grok_prstatus (abfd, note); |
| #endif |
| |
| #if defined (HAVE_PSTATUS_T) |
| case NT_PSTATUS: |
| return elfcore_grok_pstatus (abfd, note); |
| #endif |
| |
| #if defined (HAVE_LWPSTATUS_T) |
| case NT_LWPSTATUS: |
| return elfcore_grok_lwpstatus (abfd, note); |
| #endif |
| |
| case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */ |
| return elfcore_grok_prfpreg (abfd, note); |
| |
| #if defined (HAVE_WIN32_PSTATUS_T) |
| case NT_WIN32PSTATUS: |
| return elfcore_grok_win32pstatus (abfd, note); |
| #endif |
| |
| case NT_PRXFPREG: /* Linux SSE extension */ |
| if (note->namesz == 5 |
| && ! strcmp (note->namedata, "LINUX")) |
| return elfcore_grok_prxfpreg (abfd, note); |
| else |
| return true; |
| |
| #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) |
| case NT_PRPSINFO: |
| case NT_PSINFO: |
| return elfcore_grok_psinfo (abfd, note); |
| #endif |
| } |
| } |
| |
| |
| static boolean |
| elfcore_read_notes (abfd, offset, size) |
| bfd* abfd; |
| bfd_vma offset; |
| bfd_vma size; |
| { |
| char* buf; |
| char* p; |
| |
| if (size <= 0) |
| return true; |
| |
| if (bfd_seek (abfd, offset, SEEK_SET) == -1) |
| return false; |
| |
| buf = bfd_malloc ((size_t) size); |
| if (buf == NULL) |
| return false; |
| |
| if (bfd_read (buf, size, 1, abfd) != size) |
| { |
| error: |
| free (buf); |
| return false; |
| } |
| |
| p = buf; |
| while (p < buf + size) |
| { |
| /* FIXME: bad alignment assumption. */ |
| Elf_External_Note* xnp = (Elf_External_Note*) p; |
| Elf_Internal_Note in; |
| |
| in.type = bfd_h_get_32 (abfd, (bfd_byte *) xnp->type); |
| |
| in.namesz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->namesz); |
| in.namedata = xnp->name; |
| |
| in.descsz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->descsz); |
| in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4); |
| in.descpos = offset + (in.descdata - buf); |
| |
| if (! elfcore_grok_note (abfd, &in)) |
| goto error; |
| |
| p = in.descdata + BFD_ALIGN (in.descsz, 4); |
| } |
| |
| free (buf); |
| return true; |
| } |
| |
| |
| /* FIXME: This function is now unnecessary. Callers can just call |
| bfd_section_from_phdr directly. */ |
| |
| boolean |
| _bfd_elfcore_section_from_phdr (abfd, phdr, sec_num) |
| bfd* abfd; |
| Elf_Internal_Phdr* phdr; |
| int sec_num; |
| { |
| if (! bfd_section_from_phdr (abfd, phdr, sec_num)) |
| return false; |
| |
| return true; |
| } |
| |
| |
| |
| /* Providing external access to the ELF program header table. */ |
| |
| /* Return an upper bound on the number of bytes required to store a |
| copy of ABFD's program header table entries. Return -1 if an error |
| occurs; bfd_get_error will return an appropriate code. */ |
| long |
| bfd_get_elf_phdr_upper_bound (abfd) |
| bfd *abfd; |
| { |
| if (abfd->xvec->flavour != bfd_target_elf_flavour) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return -1; |
| } |
| |
| return (elf_elfheader (abfd)->e_phnum |
| * sizeof (Elf_Internal_Phdr)); |
| } |
| |
| |
| /* Copy ABFD's program header table entries to *PHDRS. The entries |
| will be stored as an array of Elf_Internal_Phdr structures, as |
| defined in include/elf/internal.h. To find out how large the |
| buffer needs to be, call bfd_get_elf_phdr_upper_bound. |
| |
| Return the number of program header table entries read, or -1 if an |
| error occurs; bfd_get_error will return an appropriate code. */ |
| int |
| bfd_get_elf_phdrs (abfd, phdrs) |
| bfd *abfd; |
| void *phdrs; |
| { |
| int num_phdrs; |
| |
| if (abfd->xvec->flavour != bfd_target_elf_flavour) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return -1; |
| } |
| |
| num_phdrs = elf_elfheader (abfd)->e_phnum; |
| memcpy (phdrs, elf_tdata (abfd)->phdr, |
| num_phdrs * sizeof (Elf_Internal_Phdr)); |
| |
| return num_phdrs; |
| } |