| /* BFD back-end for PPCbug boot records. |
| Copyright (C) 1996-2016 Free Software Foundation, Inc. |
| Written by Michael Meissner, Cygnus Support, <meissner@cygnus.com> |
| |
| 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| |
| /* This is a BFD backend which may be used to write PowerPCBug boot objects. |
| It may only be used for output, not input. The intention is that this may |
| be used as an output format for objcopy in order to generate raw binary |
| data. |
| |
| This is very simple. The only complication is that the real data |
| will start at some address X, and in some cases we will not want to |
| include X zeroes just to get to that point. Since the start |
| address is not meaningful for this object file format, we use it |
| instead to indicate the number of zeroes to skip at the start of |
| the file. objcopy cooperates by specially setting the start |
| address to zero by default. */ |
| |
| #include "sysdep.h" |
| #include "safe-ctype.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| |
| /* PPCbug location structure */ |
| typedef struct ppcboot_location |
| { |
| bfd_byte ind; |
| bfd_byte head; |
| bfd_byte sector; |
| bfd_byte cylinder; |
| } ppcboot_location_t; |
| |
| /* PPCbug partition table layout */ |
| typedef struct ppcboot_partition |
| { |
| ppcboot_location_t partition_begin; /* partition begin */ |
| ppcboot_location_t partition_end; /* partition end */ |
| bfd_byte sector_begin[4]; /* 32-bit start RBA (zero-based), little endian */ |
| bfd_byte sector_length[4]; /* 32-bit RBA count (one-based), little endian */ |
| } ppcboot_partition_t; |
| |
| /* PPCbug boot layout. */ |
| typedef struct ppcboot_hdr |
| { |
| bfd_byte pc_compatibility[446]; /* x86 instruction field */ |
| ppcboot_partition_t partition[4]; /* partition information */ |
| bfd_byte signature[2]; /* 0x55 and 0xaa */ |
| bfd_byte entry_offset[4]; /* entry point offset, little endian */ |
| bfd_byte length[4]; /* load image length, little endian */ |
| bfd_byte flags; /* flag field */ |
| bfd_byte os_id; /* OS_ID */ |
| char partition_name[32]; /* partition name */ |
| bfd_byte reserved1[470]; /* reserved */ |
| } |
| #ifdef __GNUC__ |
| __attribute__ ((packed)) |
| #endif |
| ppcboot_hdr_t; |
| |
| /* Signature bytes for last 2 bytes of the 512 byte record */ |
| #define SIGNATURE0 0x55 |
| #define SIGNATURE1 0xaa |
| |
| /* PowerPC boot type */ |
| #define PPC_IND 0x41 |
| |
| /* Information needed for ppcboot header */ |
| typedef struct ppcboot_data |
| { |
| ppcboot_hdr_t header; /* raw header */ |
| asection *sec; /* single section */ |
| } ppcboot_data_t; |
| |
| /* Any bfd we create by reading a ppcboot file has three symbols: |
| a start symbol, an end symbol, and an absolute length symbol. */ |
| #define PPCBOOT_SYMS 3 |
| |
| #define ppcboot_set_tdata(abfd, ptr) ((abfd)->tdata.any = (ptr)) |
| #define ppcboot_get_tdata(abfd) ((ppcboot_data_t *) ((abfd)->tdata.any)) |
| |
| /* Create a ppcboot object. Invoked via bfd_set_format. */ |
| |
| static bfd_boolean |
| ppcboot_mkobject (bfd *abfd) |
| { |
| if (!ppcboot_get_tdata (abfd)) |
| { |
| bfd_size_type amt = sizeof (ppcboot_data_t); |
| ppcboot_set_tdata (abfd, bfd_zalloc (abfd, amt)); |
| } |
| |
| return TRUE; |
| } |
| |
| |
| /* Set the architecture to PowerPC */ |
| static bfd_boolean |
| ppcboot_set_arch_mach (bfd *abfd, |
| enum bfd_architecture arch, |
| unsigned long machine) |
| { |
| if (arch == bfd_arch_unknown) |
| arch = bfd_arch_powerpc; |
| |
| else if (arch != bfd_arch_powerpc) |
| return FALSE; |
| |
| return bfd_default_set_arch_mach (abfd, arch, machine); |
| } |
| |
| |
| /* Any file may be considered to be a ppcboot file, provided the target |
| was not defaulted. That is, it must be explicitly specified as |
| being ppcboot. */ |
| |
| static const bfd_target * |
| ppcboot_object_p (bfd *abfd) |
| { |
| struct stat statbuf; |
| asection *sec; |
| ppcboot_hdr_t hdr; |
| size_t i; |
| ppcboot_data_t *tdata; |
| flagword flags; |
| |
| BFD_ASSERT (sizeof (ppcboot_hdr_t) == 1024); |
| |
| if (abfd->target_defaulted) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| /* Find the file size. */ |
| if (bfd_stat (abfd, &statbuf) < 0) |
| { |
| bfd_set_error (bfd_error_system_call); |
| return NULL; |
| } |
| |
| if ((size_t) statbuf.st_size < sizeof (ppcboot_hdr_t)) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| if (bfd_bread (&hdr, (bfd_size_type) sizeof (hdr), abfd) |
| != sizeof (hdr)) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| |
| return NULL; |
| } |
| |
| /* Now do some basic checks. */ |
| for (i = 0; i < sizeof (hdr.pc_compatibility); i++) |
| if (hdr.pc_compatibility[i]) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| if (hdr.signature[0] != SIGNATURE0 || hdr.signature[1] != SIGNATURE1) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| if (hdr.partition[0].partition_end.ind != PPC_IND) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| abfd->symcount = PPCBOOT_SYMS; |
| |
| /* One data section. */ |
| flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_CODE | SEC_HAS_CONTENTS; |
| sec = bfd_make_section_with_flags (abfd, ".data", flags); |
| if (sec == NULL) |
| return NULL; |
| sec->vma = 0; |
| sec->size = statbuf.st_size - sizeof (ppcboot_hdr_t); |
| sec->filepos = sizeof (ppcboot_hdr_t); |
| |
| ppcboot_mkobject (abfd); |
| tdata = ppcboot_get_tdata (abfd); |
| tdata->sec = sec; |
| memcpy (&tdata->header, &hdr, sizeof (ppcboot_hdr_t)); |
| |
| ppcboot_set_arch_mach (abfd, bfd_arch_powerpc, 0L); |
| return abfd->xvec; |
| } |
| |
| #define ppcboot_close_and_cleanup _bfd_generic_close_and_cleanup |
| #define ppcboot_bfd_free_cached_info _bfd_generic_bfd_free_cached_info |
| #define ppcboot_new_section_hook _bfd_generic_new_section_hook |
| |
| |
| /* Get contents of the only section. */ |
| |
| static bfd_boolean |
| ppcboot_get_section_contents (bfd *abfd, |
| asection *section ATTRIBUTE_UNUSED, |
| void * location, |
| file_ptr offset, |
| bfd_size_type count) |
| { |
| if (bfd_seek (abfd, offset + (file_ptr) sizeof (ppcboot_hdr_t), SEEK_SET) != 0 |
| || bfd_bread (location, count, abfd) != count) |
| return FALSE; |
| return TRUE; |
| } |
| |
| |
| /* Return the amount of memory needed to read the symbol table. */ |
| |
| static long |
| ppcboot_get_symtab_upper_bound (bfd *abfd ATTRIBUTE_UNUSED) |
| { |
| return (PPCBOOT_SYMS + 1) * sizeof (asymbol *); |
| } |
| |
| |
| /* Create a symbol name based on the bfd's filename. */ |
| |
| static char * |
| mangle_name (bfd *abfd, char *suffix) |
| { |
| bfd_size_type size; |
| char *buf; |
| char *p; |
| |
| size = (strlen (bfd_get_filename (abfd)) |
| + strlen (suffix) |
| + sizeof "_ppcboot__"); |
| |
| buf = (char *) bfd_alloc (abfd, size); |
| if (buf == NULL) |
| return ""; |
| |
| sprintf (buf, "_ppcboot_%s_%s", bfd_get_filename (abfd), suffix); |
| |
| /* Change any non-alphanumeric characters to underscores. */ |
| for (p = buf; *p; p++) |
| if (! ISALNUM (*p)) |
| *p = '_'; |
| |
| return buf; |
| } |
| |
| |
| /* Return the symbol table. */ |
| |
| static long |
| ppcboot_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
| { |
| asection *sec = ppcboot_get_tdata (abfd)->sec; |
| asymbol *syms; |
| unsigned int i; |
| bfd_size_type amt = PPCBOOT_SYMS * sizeof (asymbol); |
| |
| syms = (asymbol *) bfd_alloc (abfd, amt); |
| if (syms == NULL) |
| return FALSE; |
| |
| /* Start symbol. */ |
| syms[0].the_bfd = abfd; |
| syms[0].name = mangle_name (abfd, "start"); |
| syms[0].value = 0; |
| syms[0].flags = BSF_GLOBAL; |
| syms[0].section = sec; |
| syms[0].udata.p = NULL; |
| |
| /* End symbol. */ |
| syms[1].the_bfd = abfd; |
| syms[1].name = mangle_name (abfd, "end"); |
| syms[1].value = sec->size; |
| syms[1].flags = BSF_GLOBAL; |
| syms[1].section = sec; |
| syms[1].udata.p = NULL; |
| |
| /* Size symbol. */ |
| syms[2].the_bfd = abfd; |
| syms[2].name = mangle_name (abfd, "size"); |
| syms[2].value = sec->size; |
| syms[2].flags = BSF_GLOBAL; |
| syms[2].section = bfd_abs_section_ptr; |
| syms[2].udata.p = NULL; |
| |
| for (i = 0; i < PPCBOOT_SYMS; i++) |
| *alocation++ = syms++; |
| *alocation = NULL; |
| |
| return PPCBOOT_SYMS; |
| } |
| |
| #define ppcboot_make_empty_symbol _bfd_generic_make_empty_symbol |
| #define ppcboot_print_symbol _bfd_nosymbols_print_symbol |
| |
| /* Get information about a symbol. */ |
| |
| static void |
| ppcboot_get_symbol_info (bfd *ignore_abfd ATTRIBUTE_UNUSED, |
| asymbol *symbol, |
| symbol_info *ret) |
| { |
| bfd_symbol_info (symbol, ret); |
| } |
| |
| #define ppcboot_get_symbol_version_string \ |
| _bfd_nosymbols_get_symbol_version_string |
| #define ppcboot_bfd_is_target_special_symbol \ |
| ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) |
| #define ppcboot_bfd_is_local_label_name bfd_generic_is_local_label_name |
| #define ppcboot_get_lineno _bfd_nosymbols_get_lineno |
| #define ppcboot_find_nearest_line _bfd_nosymbols_find_nearest_line |
| #define ppcboot_find_line _bfd_nosymbols_find_line |
| #define ppcboot_find_inliner_info _bfd_nosymbols_find_inliner_info |
| #define ppcboot_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
| #define ppcboot_read_minisymbols _bfd_generic_read_minisymbols |
| #define ppcboot_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol |
| |
| /* Write section contents of a ppcboot file. */ |
| |
| static bfd_boolean |
| ppcboot_set_section_contents (bfd *abfd, |
| asection *sec, |
| const void * data, |
| file_ptr offset, |
| bfd_size_type size) |
| { |
| if (! abfd->output_has_begun) |
| { |
| bfd_vma low; |
| asection *s; |
| |
| /* The lowest section VMA sets the virtual address of the start |
| of the file. We use the set the file position of all the |
| sections. */ |
| low = abfd->sections->vma; |
| for (s = abfd->sections->next; s != NULL; s = s->next) |
| if (s->vma < low) |
| low = s->vma; |
| |
| for (s = abfd->sections; s != NULL; s = s->next) |
| s->filepos = s->vma - low; |
| |
| abfd->output_has_begun = TRUE; |
| } |
| |
| return _bfd_generic_set_section_contents (abfd, sec, data, offset, size); |
| } |
| |
| |
| static int |
| ppcboot_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| { |
| return sizeof (ppcboot_hdr_t); |
| } |
| |
| |
| /* Print out the program headers. */ |
| |
| static bfd_boolean |
| ppcboot_bfd_print_private_bfd_data (bfd *abfd, void * farg) |
| { |
| FILE *f = (FILE *)farg; |
| ppcboot_data_t *tdata = ppcboot_get_tdata (abfd); |
| long entry_offset = bfd_getl_signed_32 (tdata->header.entry_offset); |
| long length = bfd_getl_signed_32 (tdata->header.length); |
| int i; |
| |
| fprintf (f, _("\nppcboot header:\n")); |
| fprintf (f, _("Entry offset = 0x%.8lx (%ld)\n"), |
| (unsigned long) entry_offset, entry_offset); |
| fprintf (f, _("Length = 0x%.8lx (%ld)\n"), |
| (unsigned long) length, length); |
| |
| if (tdata->header.flags) |
| fprintf (f, _("Flag field = 0x%.2x\n"), tdata->header.flags); |
| |
| if (tdata->header.os_id) |
| fprintf (f, "OS_ID = 0x%.2x\n", tdata->header.os_id); |
| |
| if (tdata->header.partition_name[0]) |
| fprintf (f, _("Partition name = \"%s\"\n"), tdata->header.partition_name); |
| |
| for (i = 0; i < 4; i++) |
| { |
| long sector_begin = bfd_getl_signed_32 (tdata->header.partition[i].sector_begin); |
| long sector_length = bfd_getl_signed_32 (tdata->header.partition[i].sector_length); |
| |
| /* Skip all 0 entries */ |
| if (!tdata->header.partition[i].partition_begin.ind |
| && !tdata->header.partition[i].partition_begin.head |
| && !tdata->header.partition[i].partition_begin.sector |
| && !tdata->header.partition[i].partition_begin.cylinder |
| && !tdata->header.partition[i].partition_end.ind |
| && !tdata->header.partition[i].partition_end.head |
| && !tdata->header.partition[i].partition_end.sector |
| && !tdata->header.partition[i].partition_end.cylinder |
| && !sector_begin && !sector_length) |
| continue; |
| |
| fprintf (f, _("\nPartition[%d] start = { 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x }\n"), i, |
| tdata->header.partition[i].partition_begin.ind, |
| tdata->header.partition[i].partition_begin.head, |
| tdata->header.partition[i].partition_begin.sector, |
| tdata->header.partition[i].partition_begin.cylinder); |
| |
| fprintf (f, _("Partition[%d] end = { 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x }\n"), i, |
| tdata->header.partition[i].partition_end.ind, |
| tdata->header.partition[i].partition_end.head, |
| tdata->header.partition[i].partition_end.sector, |
| tdata->header.partition[i].partition_end.cylinder); |
| |
| fprintf (f, _("Partition[%d] sector = 0x%.8lx (%ld)\n"), |
| i, (unsigned long) sector_begin, sector_begin); |
| fprintf (f, _("Partition[%d] length = 0x%.8lx (%ld)\n"), |
| i, (unsigned long) sector_length, sector_length); |
| } |
| |
| fprintf (f, "\n"); |
| return TRUE; |
| } |
| |
| |
| #define ppcboot_bfd_get_relocated_section_contents \ |
| bfd_generic_get_relocated_section_contents |
| #define ppcboot_bfd_relax_section bfd_generic_relax_section |
| #define ppcboot_bfd_gc_sections bfd_generic_gc_sections |
| #define ppcboot_bfd_lookup_section_flags bfd_generic_lookup_section_flags |
| #define ppcboot_bfd_merge_sections bfd_generic_merge_sections |
| #define ppcboot_bfd_is_group_section bfd_generic_is_group_section |
| #define ppcboot_bfd_discard_group bfd_generic_discard_group |
| #define ppcboot_section_already_linked \ |
| _bfd_generic_section_already_linked |
| #define ppcboot_bfd_define_common_symbol bfd_generic_define_common_symbol |
| #define ppcboot_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
| #define ppcboot_bfd_link_add_symbols _bfd_generic_link_add_symbols |
| #define ppcboot_bfd_link_just_syms _bfd_generic_link_just_syms |
| #define ppcboot_bfd_copy_link_hash_symbol_type \ |
| _bfd_generic_copy_link_hash_symbol_type |
| #define ppcboot_bfd_final_link _bfd_generic_final_link |
| #define ppcboot_bfd_link_split_section _bfd_generic_link_split_section |
| #define ppcboot_get_section_contents_in_window \ |
| _bfd_generic_get_section_contents_in_window |
| #define ppcboot_bfd_link_check_relocs _bfd_generic_link_check_relocs |
| |
| #define ppcboot_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data |
| #define ppcboot_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data |
| #define ppcboot_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data |
| #define ppcboot_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data |
| #define ppcboot_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data |
| #define ppcboot_bfd_set_private_flags _bfd_generic_bfd_set_private_flags |
| #define ppcboot_bfd_print_private_bfd_dat ppcboot_bfd_print_private_bfd_data |
| |
| const bfd_target powerpc_boot_vec = |
| { |
| "ppcboot", /* name */ |
| bfd_target_unknown_flavour, /* flavour */ |
| BFD_ENDIAN_BIG, /* byteorder is big endian for code */ |
| BFD_ENDIAN_LITTLE, /* header_byteorder */ |
| EXEC_P, /* object_flags */ |
| (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA |
| | SEC_ROM | SEC_HAS_CONTENTS), /* section_flags */ |
| 0, /* symbol_leading_char */ |
| ' ', /* ar_pad_char */ |
| 16, /* ar_max_namelen */ |
| 0, /* match priority. */ |
| bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ |
| bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| { /* bfd_check_format */ |
| _bfd_dummy_target, |
| ppcboot_object_p, /* bfd_check_format */ |
| _bfd_dummy_target, |
| _bfd_dummy_target, |
| }, |
| { /* bfd_set_format */ |
| bfd_false, |
| ppcboot_mkobject, |
| bfd_false, |
| bfd_false, |
| }, |
| { /* bfd_write_contents */ |
| bfd_false, |
| bfd_true, |
| bfd_false, |
| bfd_false, |
| }, |
| |
| BFD_JUMP_TABLE_GENERIC (ppcboot), |
| BFD_JUMP_TABLE_COPY (ppcboot), |
| BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), |
| BFD_JUMP_TABLE_SYMBOLS (ppcboot), |
| BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), |
| BFD_JUMP_TABLE_WRITE (ppcboot), |
| BFD_JUMP_TABLE_LINK (ppcboot), |
| BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| |
| NULL, |
| |
| NULL |
| }; |