| /* 32-bit ELF support for S+core. |
| Copyright (C) 2009-2021 Free Software Foundation, Inc. |
| Contributed by |
| Brain.lin (brain.lin@sunplusct.com) |
| Mei Ligang (ligang@sunnorth.com.cn) |
| Pei-Lin Tsai (pltsai@sunplus.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. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| #include "libiberty.h" |
| #include "elf-bfd.h" |
| #include "elf/score.h" |
| #include "elf/common.h" |
| #include "elf/internal.h" |
| #include "hashtab.h" |
| #include "elf32-score.h" |
| |
| |
| /* The SCORE ELF linker needs additional information for each symbol in |
| the global hash table. */ |
| struct score_elf_link_hash_entry |
| { |
| struct elf_link_hash_entry root; |
| |
| /* Number of R_SCORE_ABS32, R_SCORE_REL32 relocs against this symbol. */ |
| unsigned int possibly_dynamic_relocs; |
| |
| /* If the R_SCORE_ABS32, R_SCORE_REL32 reloc is against a readonly section. */ |
| bool readonly_reloc; |
| |
| /* We must not create a stub for a symbol that has relocations related to |
| taking the function's address, i.e. any but R_SCORE_CALL15 ones. */ |
| bool no_fn_stub; |
| |
| /* Are we forced local? This will only be set if we have converted |
| the initial global GOT entry to a local GOT entry. */ |
| bool forced_local; |
| }; |
| |
| /* Traverse a score ELF linker hash table. */ |
| #define score_elf_link_hash_traverse(table, func, info) \ |
| (elf_link_hash_traverse \ |
| ((table), \ |
| (bool (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| (info))) |
| |
| /* This structure is used to hold .got entries while estimating got sizes. */ |
| struct score_got_entry |
| { |
| /* The input bfd in which the symbol is defined. */ |
| bfd *abfd; |
| /* The index of the symbol, as stored in the relocation r_info, if |
| we have a local symbol; -1 otherwise. */ |
| long symndx; |
| union |
| { |
| /* If abfd == NULL, an address that must be stored in the got. */ |
| bfd_vma address; |
| /* If abfd != NULL && symndx != -1, the addend of the relocation |
| that should be added to the symbol value. */ |
| bfd_vma addend; |
| /* If abfd != NULL && symndx == -1, the hash table entry |
| corresponding to a global symbol in the got (or, local, if |
| h->forced_local). */ |
| struct score_elf_link_hash_entry *h; |
| } d; |
| |
| /* The offset from the beginning of the .got section to the entry |
| corresponding to this symbol+addend. If it's a global symbol |
| whose offset is yet to be decided, it's going to be -1. */ |
| long gotidx; |
| }; |
| |
| /* This structure is passed to score_elf_sort_hash_table_f when sorting |
| the dynamic symbols. */ |
| struct score_elf_hash_sort_data |
| { |
| /* The symbol in the global GOT with the lowest dynamic symbol table index. */ |
| struct elf_link_hash_entry *low; |
| /* The least dynamic symbol table index corresponding to a symbol with a GOT entry. */ |
| long min_got_dynindx; |
| /* The greatest dynamic symbol table index corresponding to a symbol |
| with a GOT entry that is not referenced (e.g., a dynamic symbol |
| with dynamic relocations pointing to it from non-primary GOTs). */ |
| long max_unref_got_dynindx; |
| /* The greatest dynamic symbol table index not corresponding to a |
| symbol without a GOT entry. */ |
| long max_non_got_dynindx; |
| }; |
| |
| struct score_got_info |
| { |
| /* The global symbol in the GOT with the lowest index in the dynamic |
| symbol table. */ |
| struct elf_link_hash_entry *global_gotsym; |
| /* The number of global .got entries. */ |
| unsigned int global_gotno; |
| /* The number of local .got entries. */ |
| unsigned int local_gotno; |
| /* The number of local .got entries we have used. */ |
| unsigned int assigned_gotno; |
| /* A hash table holding members of the got. */ |
| struct htab *got_entries; |
| /* In multi-got links, a pointer to the next got (err, rather, most |
| of the time, it points to the previous got). */ |
| struct score_got_info *next; |
| }; |
| |
| /* A structure used to count GOT entries, for GOT entry or ELF symbol table traversal. */ |
| struct _score_elf_section_data |
| { |
| struct bfd_elf_section_data elf; |
| union |
| { |
| struct score_got_info *got_info; |
| bfd_byte *tdata; |
| } |
| u; |
| }; |
| |
| #define score_elf_section_data(sec) \ |
| ((struct _score_elf_section_data *) elf_section_data (sec)) |
| |
| /* The size of a symbol-table entry. */ |
| #define SCORE_ELF_SYM_SIZE(abfd) \ |
| (get_elf_backend_data (abfd)->s->sizeof_sym) |
| |
| /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| from smaller values. Start with zero, widen, *then* decrement. */ |
| #define MINUS_ONE (((bfd_vma)0) - 1) |
| #define MINUS_TWO (((bfd_vma)0) - 2) |
| |
| #define PDR_SIZE 32 |
| |
| |
| /* The number of local .got entries we reserve. */ |
| #define SCORE_RESERVED_GOTNO (2) |
| #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| |
| /* The offset of $gp from the beginning of the .got section. */ |
| #define ELF_SCORE_GP_OFFSET(abfd) (0x3ff0) |
| |
| /* The maximum size of the GOT for it to be addressable using 15-bit offsets from $gp. */ |
| #define SCORE_ELF_GOT_MAX_SIZE(abfd) (ELF_SCORE_GP_OFFSET(abfd) + 0x3fff) |
| |
| #define SCORE_ELF_STUB_SECTION_NAME (".SCORE.stub") |
| #define SCORE_FUNCTION_STUB_SIZE (16) |
| |
| #define STUB_LW 0xc3bcc010 /* lw r29, [r28, -0x3ff0] */ |
| #define STUB_MOVE 0x8323bc56 /* mv r25, r3 */ |
| #define STUB_LI16 0x87548000 /* ori r26, .dynsym_index */ |
| #define STUB_BRL 0x801dbc09 /* brl r29 */ |
| |
| #define SCORE_ELF_GOT_SIZE(abfd) \ |
| (get_elf_backend_data (abfd)->s->arch_size / 8) |
| |
| #define SCORE_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \ |
| (_bfd_elf_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val)) |
| |
| /* The size of an external dynamic table entry. */ |
| #define SCORE_ELF_DYN_SIZE(abfd) \ |
| (get_elf_backend_data (abfd)->s->sizeof_dyn) |
| |
| /* The size of an external REL relocation. */ |
| #define SCORE_ELF_REL_SIZE(abfd) \ |
| (get_elf_backend_data (abfd)->s->sizeof_rel) |
| |
| /* The default alignment for sections, as a power of two. */ |
| #define SCORE_ELF_LOG_FILE_ALIGN(abfd)\ |
| (get_elf_backend_data (abfd)->s->log_file_align) |
| |
| static bfd_byte *hi16_rel_addr; |
| |
| /* This will be used when we sort the dynamic relocation records. */ |
| static bfd *reldyn_sorting_bfd; |
| |
| /* SCORE ELF uses two common sections. One is the usual one, and the |
| other is for small objects. All the small objects are kept |
| together, and then referenced via the gp pointer, which yields |
| faster assembler code. This is what we use for the small common |
| section. This approach is copied from ecoff.c. */ |
| static asection score_elf_scom_section; |
| static const asymbol score_elf_scom_symbol = |
| GLOBAL_SYM_INIT (".scommon", &score_elf_scom_section); |
| static asection score_elf_scom_section = |
| BFD_FAKE_SECTION (score_elf_scom_section, &score_elf_scom_symbol, |
| ".scommon", 0, SEC_IS_COMMON | SEC_SMALL_DATA); |
| |
| static bfd_reloc_status_type |
| score_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| arelent *reloc_entry, |
| asymbol *symbol ATTRIBUTE_UNUSED, |
| void * data, |
| asection *input_section ATTRIBUTE_UNUSED, |
| bfd *output_bfd ATTRIBUTE_UNUSED, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| hi16_rel_addr = (bfd_byte *) data + reloc_entry->address; |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| score_elf_lo16_reloc (bfd *abfd, |
| arelent *reloc_entry, |
| asymbol *symbol ATTRIBUTE_UNUSED, |
| void * data, |
| asection *input_section, |
| bfd *output_bfd ATTRIBUTE_UNUSED, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| bfd_vma addend = 0, offset = 0; |
| unsigned long val; |
| unsigned long hi16_offset, hi16_value, uvalue; |
| |
| hi16_value = bfd_get_32 (abfd, hi16_rel_addr); |
| hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1; |
| addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; |
| val = reloc_entry->addend; |
| if (reloc_entry->address > input_section->size) |
| return bfd_reloc_outofrange; |
| uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val; |
| hi16_offset = (uvalue >> 16) << 1; |
| hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| bfd_put_32 (abfd, hi16_value, hi16_rel_addr); |
| offset = (uvalue & 0xffff) << 1; |
| addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address); |
| return bfd_reloc_ok; |
| } |
| |
| /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| dangerous relocation. */ |
| |
| static bool |
| score_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) |
| { |
| unsigned int count; |
| asymbol **sym; |
| unsigned int i; |
| |
| /* If we've already figured out what GP will be, just return it. */ |
| *pgp = _bfd_get_gp_value (output_bfd); |
| if (*pgp) |
| return true; |
| |
| count = bfd_get_symcount (output_bfd); |
| sym = bfd_get_outsymbols (output_bfd); |
| |
| /* The linker script will have created a symbol named `_gp' with the |
| appropriate value. */ |
| if (sym == NULL) |
| i = count; |
| else |
| { |
| for (i = 0; i < count; i++, sym++) |
| { |
| const char *name; |
| |
| name = bfd_asymbol_name (*sym); |
| if (*name == '_' && strcmp (name, "_gp") == 0) |
| { |
| *pgp = bfd_asymbol_value (*sym); |
| _bfd_set_gp_value (output_bfd, *pgp); |
| break; |
| } |
| } |
| } |
| |
| if (i >= count) |
| { |
| /* Only get the error once. */ |
| *pgp = 4; |
| _bfd_set_gp_value (output_bfd, *pgp); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* We have to figure out the gp value, so that we can adjust the |
| symbol value correctly. We look up the symbol _gp in the output |
| BFD. If we can't find it, we're stuck. We cache it in the ELF |
| target data. We don't need to adjust the symbol value for an |
| external symbol if we are producing relocatable output. */ |
| |
| static bfd_reloc_status_type |
| score_elf_final_gp (bfd *output_bfd, |
| asymbol *symbol, |
| bool relocatable, |
| char **error_message, |
| bfd_vma *pgp) |
| { |
| if (bfd_is_und_section (symbol->section) |
| && ! relocatable) |
| { |
| *pgp = 0; |
| return bfd_reloc_undefined; |
| } |
| |
| *pgp = _bfd_get_gp_value (output_bfd); |
| if (*pgp == 0 |
| && (! relocatable |
| || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| { |
| if (relocatable) |
| { |
| /* Make up a value. */ |
| *pgp = symbol->section->output_section->vma + 0x4000; |
| _bfd_set_gp_value (output_bfd, *pgp); |
| } |
| else if (!score_elf_assign_gp (output_bfd, pgp)) |
| { |
| *error_message = |
| (char *) _("GP relative relocation when _gp not defined"); |
| return bfd_reloc_dangerous; |
| } |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| score_elf_gprel15_with_gp (bfd *abfd, |
| asymbol *symbol, |
| arelent *reloc_entry, |
| asection *input_section, |
| bool relocateable, |
| void * data, |
| bfd_vma gp ATTRIBUTE_UNUSED) |
| { |
| bfd_vma relocation; |
| unsigned long insn; |
| |
| if (bfd_is_com_section (symbol->section)) |
| relocation = 0; |
| else |
| relocation = symbol->value; |
| |
| relocation += symbol->section->output_section->vma; |
| relocation += symbol->section->output_offset; |
| if (reloc_entry->address > input_section->size) |
| return bfd_reloc_outofrange; |
| |
| insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| if (((reloc_entry->addend & 0xffffc000) != 0) |
| && ((reloc_entry->addend & 0xffffc000) != 0xffffc000)) |
| return bfd_reloc_overflow; |
| |
| insn = (insn & ~0x7fff) | (reloc_entry->addend & 0x7fff); |
| bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| if (relocateable) |
| reloc_entry->address += input_section->output_offset; |
| |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry, |
| asection *input_section, bool relocatable, |
| void *data, bfd_vma gp) |
| { |
| bfd_vma relocation; |
| bfd_vma val; |
| |
| if (bfd_is_com_section (symbol->section)) |
| relocation = 0; |
| else |
| relocation = symbol->value; |
| |
| relocation += symbol->section->output_section->vma; |
| relocation += symbol->section->output_offset; |
| |
| if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| return bfd_reloc_outofrange; |
| |
| /* Set val to the offset into the section or symbol. */ |
| val = reloc_entry->addend; |
| |
| if (reloc_entry->howto->partial_inplace) |
| val += bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| |
| /* Adjust val for the final section location and GP value. If we |
| are producing relocatable output, we don't want to do this for |
| an external symbol. */ |
| if (! relocatable |
| || (symbol->flags & BSF_SECTION_SYM) != 0) |
| val += relocation - gp; |
| |
| if (reloc_entry->howto->partial_inplace) |
| bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address); |
| else |
| reloc_entry->addend = val; |
| |
| if (relocatable) |
| reloc_entry->address += input_section->output_offset; |
| |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| score_elf_gprel15_reloc (bfd *abfd, |
| arelent *reloc_entry, |
| asymbol *symbol, |
| void * data, |
| asection *input_section, |
| bfd *output_bfd, |
| char **error_message) |
| { |
| bool relocateable; |
| bfd_reloc_status_type ret; |
| bfd_vma gp; |
| |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 && reloc_entry->addend == 0) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| if (output_bfd != NULL) |
| relocateable = true; |
| else |
| { |
| relocateable = false; |
| output_bfd = symbol->section->output_section->owner; |
| if (output_bfd == NULL) |
| return bfd_reloc_undefined; |
| } |
| |
| ret = score_elf_final_gp (output_bfd, symbol, relocateable, error_message, &gp); |
| if (ret != bfd_reloc_ok) |
| return ret; |
| |
| return score_elf_gprel15_with_gp (abfd, symbol, reloc_entry, |
| input_section, relocateable, data, gp); |
| } |
| |
| /* Do a R_SCORE_GPREL32 relocation. This is a 32 bit value which must |
| become the offset from the gp register. */ |
| |
| static bfd_reloc_status_type |
| score_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, bfd *output_bfd, |
| char **error_message) |
| { |
| bool relocatable; |
| bfd_reloc_status_type ret; |
| bfd_vma gp; |
| |
| /* R_SCORE_GPREL32 relocations are defined for local symbols only. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (symbol->flags & BSF_LOCAL) != 0) |
| { |
| *error_message = (char *) |
| _("32bits gp relative relocation occurs for an external symbol"); |
| return bfd_reloc_outofrange; |
| } |
| |
| if (output_bfd != NULL) |
| relocatable = true; |
| else |
| { |
| relocatable = false; |
| output_bfd = symbol->section->output_section->owner; |
| } |
| |
| ret = score_elf_final_gp (output_bfd, symbol, relocatable, error_message, &gp); |
| if (ret != bfd_reloc_ok) |
| return ret; |
| |
| gp = 0; |
| return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, |
| relocatable, data, gp); |
| } |
| |
| /* A howto special_function for R_SCORE_GOT15 relocations. This is just |
| like any other 16-bit relocation when applied to global symbols, but is |
| treated in the same as R_SCORE_HI16 when applied to local symbols. */ |
| |
| static bfd_reloc_status_type |
| score_elf_got15_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **error_message) |
| { |
| if ((symbol->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 |
| || bfd_is_und_section (bfd_asymbol_section (symbol)) |
| || bfd_is_com_section (bfd_asymbol_section (symbol))) |
| /* The relocation is against a global symbol. */ |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, |
| error_message); |
| |
| return score_elf_hi16_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| } |
| |
| static bfd_reloc_status_type |
| score_elf_got_lo16_reloc (bfd *abfd, |
| arelent *reloc_entry, |
| asymbol *symbol ATTRIBUTE_UNUSED, |
| void * data, |
| asection *input_section, |
| bfd *output_bfd ATTRIBUTE_UNUSED, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| bfd_vma addend = 0, offset = 0; |
| signed long val; |
| signed long hi16_offset, hi16_value, uvalue; |
| |
| hi16_value = bfd_get_32 (abfd, hi16_rel_addr); |
| hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1; |
| addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; |
| val = reloc_entry->addend; |
| if (reloc_entry->address > input_section->size) |
| return bfd_reloc_outofrange; |
| uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val; |
| if ((uvalue > -0x8000) && (uvalue < 0x7fff)) |
| hi16_offset = 0; |
| else |
| hi16_offset = (uvalue >> 16) & 0x7fff; |
| hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| bfd_put_32 (abfd, hi16_value, hi16_rel_addr); |
| offset = (uvalue & 0xffff) << 1; |
| addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address); |
| return bfd_reloc_ok; |
| } |
| |
| static reloc_howto_type elf32_score_howto_table[] = |
| { |
| /* No relocation. */ |
| HOWTO (R_SCORE_NONE, /* type */ |
| 0, /* rightshift */ |
| 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* R_SCORE_HI16 */ |
| HOWTO (R_SCORE_HI16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| score_elf_hi16_reloc, /* special_function */ |
| "R_SCORE_HI16", /* name */ |
| true, /* partial_inplace */ |
| 0x37fff, /* src_mask */ |
| 0x37fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* R_SCORE_LO16 */ |
| HOWTO (R_SCORE_LO16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| score_elf_lo16_reloc, /* special_function */ |
| "R_SCORE_LO16", /* name */ |
| true, /* partial_inplace */ |
| 0x37fff, /* src_mask */ |
| 0x37fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* R_SCORE_BCMP */ |
| HOWTO (R_SCORE_BCMP, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_BCMP", /* name */ |
| true, /* partial_inplace */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SCORE_24, /* type */ |
| 1, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 24, /* bitsize */ |
| false, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_24", /* name */ |
| false, /* partial_inplace */ |
| 0x3ff7fff, /* src_mask */ |
| 0x3ff7fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /*R_SCORE_PC19 */ |
| HOWTO (R_SCORE_PC19, /* type */ |
| 1, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 19, /* bitsize */ |
| true, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_PC19", /* name */ |
| false, /* partial_inplace */ |
| 0x3ff03fe, /* src_mask */ |
| 0x3ff03fe, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /*R_SCORE16_11 */ |
| HOWTO (R_SCORE16_11, /* type */ |
| 1, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 11, /* bitsize */ |
| false, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE16_11", /* name */ |
| false, /* partial_inplace */ |
| 0x000000ffe, /* src_mask */ |
| 0x000000ffe, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* R_SCORE16_PC8 */ |
| HOWTO (R_SCORE16_PC8, /* type */ |
| 1, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE16_PC8", /* name */ |
| false, /* partial_inplace */ |
| 0x000000ff, /* src_mask */ |
| 0x000000ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 32 bit absolute */ |
| HOWTO (R_SCORE_ABS32, /* type 8 */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_ABS32", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16 bit absolute */ |
| HOWTO (R_SCORE_ABS16, /* type 11 */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_ABS16", /* name */ |
| false, /* partial_inplace */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* R_SCORE_DUMMY2 */ |
| HOWTO (R_SCORE_DUMMY2, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_DUMMY2", /* name */ |
| true, /* partial_inplace */ |
| 0x00007fff, /* src_mask */ |
| 0x00007fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* R_SCORE_GP15 */ |
| HOWTO (R_SCORE_GP15, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| score_elf_gprel15_reloc,/* special_function */ |
| "R_SCORE_GP15", /* name */ |
| true, /* partial_inplace */ |
| 0x00007fff, /* src_mask */ |
| 0x00007fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy. */ |
| HOWTO (R_SCORE_GNU_VTINHERIT, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_SCORE_GNU_VTINHERIT", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable member usage */ |
| HOWTO (R_SCORE_GNU_VTENTRY, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| "R_SCORE_GNU_VTENTRY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Reference to global offset table. */ |
| HOWTO (R_SCORE_GOT15, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| score_elf_got15_reloc, /* special_function */ |
| "R_SCORE_GOT15", /* name */ |
| true, /* partial_inplace */ |
| 0x00007fff, /* src_mask */ |
| 0x00007fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Low 16 bits of displacement in global offset table. */ |
| HOWTO (R_SCORE_GOT_LO16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| score_elf_got_lo16_reloc, /* special_function */ |
| "R_SCORE_GOT_LO16", /* name */ |
| true, /* partial_inplace */ |
| 0x37ffe, /* src_mask */ |
| 0x37ffe, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 15 bit call through global offset table. */ |
| HOWTO (R_SCORE_CALL15, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_CALL15", /* name */ |
| true, /* partial_inplace */ |
| 0x00007fff, /* src_mask */ |
| 0x00007fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 32 bit GP relative reference. */ |
| HOWTO (R_SCORE_GPREL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| score_elf_gprel32_reloc, /* special_function */ |
| "R_SCORE_GPREL32", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 32 bit symbol relative relocation. */ |
| HOWTO (R_SCORE_REL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_SCORE_REL32", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* R_SCORE_DUMMY_HI16 */ |
| HOWTO (R_SCORE_DUMMY_HI16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 1, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| score_elf_hi16_reloc, /* special_function */ |
| "R_SCORE_DUMMY_HI16", /* name */ |
| true, /* partial_inplace */ |
| 0x37fff, /* src_mask */ |
| 0x37fff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| }; |
| |
| struct score_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char elf_reloc_val; |
| }; |
| |
| static const struct score_reloc_map elf32_score_reloc_map[] = |
| { |
| {BFD_RELOC_NONE, R_SCORE_NONE}, |
| {BFD_RELOC_HI16_S, R_SCORE_HI16}, |
| {BFD_RELOC_LO16, R_SCORE_LO16}, |
| {BFD_RELOC_SCORE_BCMP, R_SCORE_BCMP}, |
| {BFD_RELOC_SCORE_JMP, R_SCORE_24}, |
| {BFD_RELOC_SCORE_BRANCH, R_SCORE_PC19}, |
| {BFD_RELOC_SCORE16_JMP, R_SCORE16_11}, |
| {BFD_RELOC_SCORE16_BRANCH, R_SCORE16_PC8}, |
| {BFD_RELOC_32, R_SCORE_ABS32}, |
| {BFD_RELOC_16, R_SCORE_ABS16}, |
| {BFD_RELOC_SCORE_DUMMY2, R_SCORE_DUMMY2}, |
| {BFD_RELOC_SCORE_GPREL15, R_SCORE_GP15}, |
| {BFD_RELOC_VTABLE_INHERIT, R_SCORE_GNU_VTINHERIT}, |
| {BFD_RELOC_VTABLE_ENTRY, R_SCORE_GNU_VTENTRY}, |
| {BFD_RELOC_SCORE_GOT15, R_SCORE_GOT15}, |
| {BFD_RELOC_SCORE_GOT_LO16, R_SCORE_GOT_LO16}, |
| {BFD_RELOC_SCORE_CALL15, R_SCORE_CALL15}, |
| {BFD_RELOC_GPREL32, R_SCORE_GPREL32}, |
| {BFD_RELOC_32_PCREL, R_SCORE_REL32}, |
| {BFD_RELOC_SCORE_DUMMY_HI16, R_SCORE_DUMMY_HI16}, |
| }; |
| |
| static INLINE hashval_t |
| score_elf_hash_bfd_vma (bfd_vma addr) |
| { |
| #ifdef BFD64 |
| return addr + (addr >> 32); |
| #else |
| return addr; |
| #endif |
| } |
| |
| /* got_entries only match if they're identical, except for gotidx, so |
| use all fields to compute the hash, and compare the appropriate |
| union members. */ |
| |
| static hashval_t |
| score_elf_got_entry_hash (const void *entry_) |
| { |
| const struct score_got_entry *entry = (struct score_got_entry *) entry_; |
| |
| return entry->symndx |
| + (! entry->abfd ? score_elf_hash_bfd_vma (entry->d.address) |
| : entry->abfd->id |
| + (entry->symndx >= 0 ? score_elf_hash_bfd_vma (entry->d.addend) |
| : entry->d.h->root.root.root.hash)); |
| } |
| |
| static int |
| score_elf_got_entry_eq (const void *entry1, const void *entry2) |
| { |
| const struct score_got_entry *e1 = (struct score_got_entry *) entry1; |
| const struct score_got_entry *e2 = (struct score_got_entry *) entry2; |
| |
| return e1->abfd == e2->abfd && e1->symndx == e2->symndx |
| && (! e1->abfd ? e1->d.address == e2->d.address |
| : e1->symndx >= 0 ? e1->d.addend == e2->d.addend |
| : e1->d.h == e2->d.h); |
| } |
| |
| /* If H needs a GOT entry, assign it the highest available dynamic |
| index. Otherwise, assign it the lowest available dynamic |
| index. */ |
| |
| static bool |
| score_elf_sort_hash_table_f (struct score_elf_link_hash_entry *h, void *data) |
| { |
| struct score_elf_hash_sort_data *hsd = data; |
| |
| /* Symbols without dynamic symbol table entries aren't interesting at all. */ |
| if (h->root.dynindx == -1) |
| return true; |
| |
| /* Global symbols that need GOT entries that are not explicitly |
| referenced are marked with got offset 2. Those that are |
| referenced get a 1, and those that don't need GOT entries get |
| -1. */ |
| if (h->root.got.offset == 2) |
| { |
| if (hsd->max_unref_got_dynindx == hsd->min_got_dynindx) |
| hsd->low = (struct elf_link_hash_entry *) h; |
| h->root.dynindx = hsd->max_unref_got_dynindx++; |
| } |
| else if (h->root.got.offset != 1) |
| h->root.dynindx = hsd->max_non_got_dynindx++; |
| else |
| { |
| h->root.dynindx = --hsd->min_got_dynindx; |
| hsd->low = (struct elf_link_hash_entry *) h; |
| } |
| |
| return true; |
| } |
| |
| static asection * |
| score_elf_got_section (bfd *abfd, bool maybe_excluded) |
| { |
| asection *sgot = bfd_get_linker_section (abfd, ".got"); |
| |
| if (sgot == NULL || (! maybe_excluded && (sgot->flags & SEC_EXCLUDE) != 0)) |
| return NULL; |
| return sgot; |
| } |
| |
| /* Returns the GOT information associated with the link indicated by |
| INFO. If SGOTP is non-NULL, it is filled in with the GOT section. */ |
| |
| static struct score_got_info * |
| score_elf_got_info (bfd *abfd, asection **sgotp) |
| { |
| asection *sgot; |
| struct score_got_info *g; |
| |
| sgot = score_elf_got_section (abfd, true); |
| BFD_ASSERT (sgot != NULL); |
| BFD_ASSERT (elf_section_data (sgot) != NULL); |
| g = score_elf_section_data (sgot)->u.got_info; |
| BFD_ASSERT (g != NULL); |
| |
| if (sgotp) |
| *sgotp = sgot; |
| return g; |
| } |
| |
| /* Sort the dynamic symbol table so that symbols that need GOT entries |
| appear towards the end. This reduces the amount of GOT space |
| required. MAX_LOCAL is used to set the number of local symbols |
| known to be in the dynamic symbol table. During |
| s7_bfd_score_elf_size_dynamic_sections, this value is 1. Afterward, the |
| section symbols are added and the count is higher. */ |
| |
| static bool |
| score_elf_sort_hash_table (struct bfd_link_info *info, |
| unsigned long max_local) |
| { |
| struct score_elf_hash_sort_data hsd; |
| struct score_got_info *g; |
| bfd *dynobj; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| |
| g = score_elf_got_info (dynobj, NULL); |
| |
| hsd.low = NULL; |
| hsd.max_unref_got_dynindx = |
| hsd.min_got_dynindx = elf_hash_table (info)->dynsymcount |
| /* In the multi-got case, assigned_gotno of the master got_info |
| indicate the number of entries that aren't referenced in the |
| primary GOT, but that must have entries because there are |
| dynamic relocations that reference it. Since they aren't |
| referenced, we move them to the end of the GOT, so that they |
| don't prevent other entries that are referenced from getting |
| too large offsets. */ |
| - (g->next ? g->assigned_gotno : 0); |
| hsd.max_non_got_dynindx = max_local; |
| score_elf_link_hash_traverse (elf_hash_table (info), |
| score_elf_sort_hash_table_f, |
| &hsd); |
| |
| /* There should have been enough room in the symbol table to |
| accommodate both the GOT and non-GOT symbols. */ |
| BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx); |
| BFD_ASSERT ((unsigned long) hsd.max_unref_got_dynindx |
| <= elf_hash_table (info)->dynsymcount); |
| |
| /* Now we know which dynamic symbol has the lowest dynamic symbol |
| table index in the GOT. */ |
| g->global_gotsym = hsd.low; |
| |
| return true; |
| } |
| |
| /* Returns the first relocation of type r_type found, beginning with |
| RELOCATION. RELEND is one-past-the-end of the relocation table. */ |
| |
| static const Elf_Internal_Rela * |
| score_elf_next_relocation (bfd *abfd ATTRIBUTE_UNUSED, unsigned int r_type, |
| const Elf_Internal_Rela *relocation, |
| const Elf_Internal_Rela *relend) |
| { |
| while (relocation < relend) |
| { |
| if (ELF32_R_TYPE (relocation->r_info) == r_type) |
| return relocation; |
| |
| ++relocation; |
| } |
| |
| /* We didn't find it. */ |
| bfd_set_error (bfd_error_bad_value); |
| return NULL; |
| } |
| |
| /* This function is called via qsort() to sort the dynamic relocation |
| entries by increasing r_symndx value. */ |
| static int |
| score_elf_sort_dynamic_relocs (const void *arg1, const void *arg2) |
| { |
| Elf_Internal_Rela int_reloc1; |
| Elf_Internal_Rela int_reloc2; |
| |
| bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg1, &int_reloc1); |
| bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg2, &int_reloc2); |
| |
| return (ELF32_R_SYM (int_reloc1.r_info) - ELF32_R_SYM (int_reloc2.r_info)); |
| } |
| |
| /* Return whether a relocation is against a local symbol. */ |
| static bool |
| score_elf_local_relocation_p (bfd *input_bfd, |
| const Elf_Internal_Rela *relocation, |
| asection **local_sections, |
| bool check_forced) |
| { |
| unsigned long r_symndx; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct score_elf_link_hash_entry *h; |
| size_t extsymoff; |
| |
| r_symndx = ELF32_R_SYM (relocation->r_info); |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info; |
| |
| if (r_symndx < extsymoff) |
| return true; |
| if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL) |
| return true; |
| |
| if (check_forced) |
| { |
| /* Look up the hash table to check whether the symbol was forced local. */ |
| h = (struct score_elf_link_hash_entry *) |
| elf_sym_hashes (input_bfd) [r_symndx - extsymoff]; |
| /* Find the real hash-table entry for this symbol. */ |
| while (h->root.root.type == bfd_link_hash_indirect |
| || h->root.root.type == bfd_link_hash_warning) |
| h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; |
| if (h->root.forced_local) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* Returns the dynamic relocation section for DYNOBJ. */ |
| |
| static asection * |
| score_elf_rel_dyn_section (bfd *dynobj, bool create_p) |
| { |
| static const char dname[] = ".rel.dyn"; |
| asection *sreloc; |
| |
| sreloc = bfd_get_linker_section (dynobj, dname); |
| if (sreloc == NULL && create_p) |
| { |
| sreloc = bfd_make_section_anyway_with_flags (dynobj, dname, |
| (SEC_ALLOC |
| | SEC_LOAD |
| | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED |
| | SEC_READONLY)); |
| if (sreloc == NULL |
| || !bfd_set_section_alignment (sreloc, |
| SCORE_ELF_LOG_FILE_ALIGN (dynobj))) |
| return NULL; |
| } |
| return sreloc; |
| } |
| |
| static void |
| score_elf_allocate_dynamic_relocations (bfd *abfd, unsigned int n) |
| { |
| asection *s; |
| |
| s = score_elf_rel_dyn_section (abfd, false); |
| BFD_ASSERT (s != NULL); |
| |
| if (s->size == 0) |
| { |
| /* Make room for a null element. */ |
| s->size += SCORE_ELF_REL_SIZE (abfd); |
| ++s->reloc_count; |
| } |
| s->size += n * SCORE_ELF_REL_SIZE (abfd); |
| } |
| |
| /* Create a rel.dyn relocation for the dynamic linker to resolve. REL |
| is the original relocation, which is now being transformed into a |
| dynamic relocation. The ADDENDP is adjusted if necessary; the |
| caller should store the result in place of the original addend. */ |
| |
| static bool |
| score_elf_create_dynamic_relocation (bfd *output_bfd, |
| struct bfd_link_info *info, |
| const Elf_Internal_Rela *rel, |
| struct score_elf_link_hash_entry *h, |
| bfd_vma symbol, |
| bfd_vma *addendp, asection *input_section) |
| { |
| Elf_Internal_Rela outrel[3]; |
| asection *sreloc; |
| bfd *dynobj; |
| int r_type; |
| long indx; |
| bool defined_p; |
| |
| r_type = ELF32_R_TYPE (rel->r_info); |
| dynobj = elf_hash_table (info)->dynobj; |
| sreloc = score_elf_rel_dyn_section (dynobj, false); |
| BFD_ASSERT (sreloc != NULL); |
| BFD_ASSERT (sreloc->contents != NULL); |
| BFD_ASSERT (sreloc->reloc_count * SCORE_ELF_REL_SIZE (output_bfd) < sreloc->size); |
| |
| outrel[0].r_offset = |
| _bfd_elf_section_offset (output_bfd, info, input_section, rel[0].r_offset); |
| outrel[1].r_offset = |
| _bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset); |
| outrel[2].r_offset = |
| _bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset); |
| |
| if (outrel[0].r_offset == MINUS_ONE) |
| /* The relocation field has been deleted. */ |
| return true; |
| |
| if (outrel[0].r_offset == MINUS_TWO) |
| { |
| /* The relocation field has been converted into a relative value of |
| some sort. Functions like _bfd_elf_write_section_eh_frame expect |
| the field to be fully relocated, so add in the symbol's value. */ |
| *addendp += symbol; |
| return true; |
| } |
| |
| /* We must now calculate the dynamic symbol table index to use |
| in the relocation. */ |
| if (h != NULL |
| && (! info->symbolic || !h->root.def_regular) |
| /* h->root.dynindx may be -1 if this symbol was marked to |
| become local. */ |
| && h->root.dynindx != -1) |
| { |
| indx = h->root.dynindx; |
| /* ??? glibc's ld.so just adds the final GOT entry to the |
| relocation field. It therefore treats relocs against |
| defined symbols in the same way as relocs against |
| undefined symbols. */ |
| defined_p = false; |
| } |
| else |
| { |
| indx = 0; |
| defined_p = true; |
| } |
| |
| /* If the relocation was previously an absolute relocation and |
| this symbol will not be referred to by the relocation, we must |
| adjust it by the value we give it in the dynamic symbol table. |
| Otherwise leave the job up to the dynamic linker. */ |
| if (defined_p && r_type != R_SCORE_REL32) |
| *addendp += symbol; |
| |
| /* The relocation is always an REL32 relocation because we don't |
| know where the shared library will wind up at load-time. */ |
| outrel[0].r_info = ELF32_R_INFO ((unsigned long) indx, R_SCORE_REL32); |
| |
| /* For strict adherence to the ABI specification, we should |
| generate a R_SCORE_64 relocation record by itself before the |
| _REL32/_64 record as well, such that the addend is read in as |
| a 64-bit value (REL32 is a 32-bit relocation, after all). |
| However, since none of the existing ELF64 SCORE dynamic |
| loaders seems to care, we don't waste space with these |
| artificial relocations. If this turns out to not be true, |
| score_elf_allocate_dynamic_relocations() should be tweaked so |
| as to make room for a pair of dynamic relocations per |
| invocation if ABI_64_P, and here we should generate an |
| additional relocation record with R_SCORE_64 by itself for a |
| NULL symbol before this relocation record. */ |
| outrel[1].r_info = ELF32_R_INFO (0, R_SCORE_NONE); |
| outrel[2].r_info = ELF32_R_INFO (0, R_SCORE_NONE); |
| |
| /* Adjust the output offset of the relocation to reference the |
| correct location in the output file. */ |
| outrel[0].r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| outrel[1].r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| outrel[2].r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| |
| /* Put the relocation back out. We have to use the special |
| relocation outputter in the 64-bit case since the 64-bit |
| relocation format is non-standard. */ |
| bfd_elf32_swap_reloc_out |
| (output_bfd, &outrel[0], |
| (sreloc->contents + sreloc->reloc_count * sizeof (Elf32_External_Rel))); |
| |
| /* We've now added another relocation. */ |
| ++sreloc->reloc_count; |
| |
| /* Make sure the output section is writable. The dynamic linker |
| will be writing to it. */ |
| elf_section_data (input_section->output_section)->this_hdr.sh_flags |= SHF_WRITE; |
| |
| return true; |
| } |
| |
| static bool |
| score_elf_create_got_section (bfd *abfd, |
| struct bfd_link_info *info, |
| bool maybe_exclude) |
| { |
| flagword flags; |
| asection *s; |
| struct elf_link_hash_entry *h; |
| struct bfd_link_hash_entry *bh; |
| struct score_got_info *g; |
| size_t amt; |
| |
| /* This function may be called more than once. */ |
| s = score_elf_got_section (abfd, true); |
| if (s) |
| { |
| if (! maybe_exclude) |
| s->flags &= ~SEC_EXCLUDE; |
| return true; |
| } |
| |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| |
| if (maybe_exclude) |
| flags |= SEC_EXCLUDE; |
| |
| /* We have to use an alignment of 2**4 here because this is hardcoded |
| in the function stub generation and in the linker script. */ |
| s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| elf_hash_table (info)->sgot = s; |
| if (s == NULL |
| || !bfd_set_section_alignment (s, 4)) |
| return false; |
| |
| /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the |
| linker script because we don't want to define the symbol if we |
| are not creating a global offset table. */ |
| bh = NULL; |
| if (! (_bfd_generic_link_add_one_symbol |
| (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, |
| 0, NULL, false, get_elf_backend_data (abfd)->collect, &bh))) |
| return false; |
| |
| h = (struct elf_link_hash_entry *) bh; |
| h->non_elf = 0; |
| h->def_regular = 1; |
| h->type = STT_OBJECT; |
| elf_hash_table (info)->hgot = h; |
| |
| if (bfd_link_pic (info) |
| && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| |
| amt = sizeof (struct score_got_info); |
| g = bfd_alloc (abfd, amt); |
| if (g == NULL) |
| return false; |
| |
| g->global_gotsym = NULL; |
| g->global_gotno = 0; |
| |
| g->local_gotno = SCORE_RESERVED_GOTNO; |
| g->assigned_gotno = SCORE_RESERVED_GOTNO; |
| g->next = NULL; |
| |
| g->got_entries = htab_try_create (1, score_elf_got_entry_hash, |
| score_elf_got_entry_eq, NULL); |
| if (g->got_entries == NULL) |
| return false; |
| score_elf_section_data (s)->u.got_info = g; |
| score_elf_section_data (s)->elf.this_hdr.sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; |
| |
| return true; |
| } |
| |
| /* Calculate the %high function. */ |
| |
| static bfd_vma |
| score_elf_high (bfd_vma value) |
| { |
| return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff; |
| } |
| |
| /* Create a local GOT entry for VALUE. Return the index of the entry, |
| or -1 if it could not be created. */ |
| |
| static struct score_got_entry * |
| score_elf_create_local_got_entry (bfd *abfd, |
| bfd *ibfd ATTRIBUTE_UNUSED, |
| struct score_got_info *gg, |
| asection *sgot, bfd_vma value, |
| unsigned long r_symndx ATTRIBUTE_UNUSED, |
| struct score_elf_link_hash_entry *h ATTRIBUTE_UNUSED, |
| int r_type ATTRIBUTE_UNUSED) |
| { |
| struct score_got_entry entry, **loc; |
| struct score_got_info *g; |
| |
| entry.abfd = NULL; |
| entry.symndx = -1; |
| entry.d.address = value; |
| |
| g = gg; |
| loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); |
| if (*loc) |
| return *loc; |
| |
| entry.gotidx = SCORE_ELF_GOT_SIZE (abfd) * g->assigned_gotno++; |
| |
| *loc = bfd_alloc (abfd, sizeof entry); |
| |
| if (! *loc) |
| return NULL; |
| |
| memcpy (*loc, &entry, sizeof entry); |
| |
| if (g->assigned_gotno >= g->local_gotno) |
| { |
| (*loc)->gotidx = -1; |
| /* We didn't allocate enough space in the GOT. */ |
| _bfd_error_handler |
| (_("not enough GOT space for local GOT entries")); |
| bfd_set_error (bfd_error_bad_value); |
| return NULL; |
| } |
| |
| bfd_put_32 (abfd, value, (sgot->contents + entry.gotidx)); |
| |
| return *loc; |
| } |
| |
| /* Find a GOT entry whose higher-order 16 bits are the same as those |
| for value. Return the index into the GOT for this entry. */ |
| |
| static bfd_vma |
| score_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, |
| bfd_vma value, bool external) |
| { |
| asection *sgot; |
| struct score_got_info *g; |
| struct score_got_entry *entry; |
| |
| if (!external) |
| { |
| /* Although the ABI says that it is "the high-order 16 bits" that we |
| want, it is really the %high value. The complete value is |
| calculated with a `addiu' of a LO16 relocation, just as with a |
| HI16/LO16 pair. */ |
| value = score_elf_high (value) << 16; |
| } |
| |
| g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); |
| |
| entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 0, NULL, |
| R_SCORE_GOT15); |
| if (entry) |
| return entry->gotidx; |
| else |
| return MINUS_ONE; |
| } |
| |
| void |
| s7_bfd_score_elf_hide_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *entry, |
| bool force_local) |
| { |
| bfd *dynobj; |
| asection *got; |
| struct score_got_info *g; |
| struct score_elf_link_hash_entry *h; |
| |
| h = (struct score_elf_link_hash_entry *) entry; |
| if (h->forced_local) |
| return; |
| h->forced_local = true; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| if (dynobj != NULL && force_local) |
| { |
| got = score_elf_got_section (dynobj, false); |
| if (got == NULL) |
| return; |
| g = score_elf_section_data (got)->u.got_info; |
| |
| if (g->next) |
| { |
| struct score_got_entry e; |
| struct score_got_info *gg = g; |
| |
| /* Since we're turning what used to be a global symbol into a |
| local one, bump up the number of local entries of each GOT |
| that had an entry for it. This will automatically decrease |
| the number of global entries, since global_gotno is actually |
| the upper limit of global entries. */ |
| e.abfd = dynobj; |
| e.symndx = -1; |
| e.d.h = h; |
| |
| for (g = g->next; g != gg; g = g->next) |
| if (htab_find (g->got_entries, &e)) |
| { |
| BFD_ASSERT (g->global_gotno > 0); |
| g->local_gotno++; |
| g->global_gotno--; |
| } |
| |
| /* If this was a global symbol forced into the primary GOT, we |
| no longer need an entry for it. We can't release the entry |
| at this point, but we must at least stop counting it as one |
| of the symbols that required a forced got entry. */ |
| if (h->root.got.offset == 2) |
| { |
| BFD_ASSERT (gg->assigned_gotno > 0); |
| gg->assigned_gotno--; |
| } |
| } |
| else if (g->global_gotno == 0 && g->global_gotsym == NULL) |
| /* If we haven't got through GOT allocation yet, just bump up the |
| number of local entries, as this symbol won't be counted as |
| global. */ |
| g->local_gotno++; |
| else if (h->root.got.offset == 1) |
| { |
| /* If we're past non-multi-GOT allocation and this symbol had |
| been marked for a global got entry, give it a local entry |
| instead. */ |
| BFD_ASSERT (g->global_gotno > 0); |
| g->local_gotno++; |
| g->global_gotno--; |
| } |
| } |
| |
| _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local); |
| } |
| |
| /* If H is a symbol that needs a global GOT entry, but has a dynamic |
| symbol table index lower than any we've seen to date, record it for |
| posterity. */ |
| |
| static bool |
| score_elf_record_global_got_symbol (struct elf_link_hash_entry *h, |
| bfd *abfd, |
| struct bfd_link_info *info, |
| struct score_got_info *g) |
| { |
| struct score_got_entry entry, **loc; |
| |
| /* A global symbol in the GOT must also be in the dynamic symbol table. */ |
| if (h->dynindx == -1) |
| { |
| switch (ELF_ST_VISIBILITY (h->other)) |
| { |
| case STV_INTERNAL: |
| case STV_HIDDEN: |
| s7_bfd_score_elf_hide_symbol (info, h, true); |
| break; |
| } |
| if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| |
| entry.abfd = abfd; |
| entry.symndx = -1; |
| entry.d.h = (struct score_elf_link_hash_entry *) h; |
| |
| loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); |
| |
| /* If we've already marked this entry as needing GOT space, we don't |
| need to do it again. */ |
| if (*loc) |
| return true; |
| |
| *loc = bfd_alloc (abfd, sizeof entry); |
| if (! *loc) |
| return false; |
| |
| entry.gotidx = -1; |
| |
| memcpy (*loc, &entry, sizeof (entry)); |
| |
| if (h->got.offset != MINUS_ONE) |
| return true; |
| |
| /* By setting this to a value other than -1, we are indicating that |
| there needs to be a GOT entry for H. Avoid using zero, as the |
| generic ELF copy_indirect_symbol tests for <= 0. */ |
| h->got.offset = 1; |
| |
| return true; |
| } |
| |
| /* Reserve space in G for a GOT entry containing the value of symbol |
| SYMNDX in input bfd ABDF, plus ADDEND. */ |
| |
| static bool |
| score_elf_record_local_got_symbol (bfd *abfd, |
| long symndx, |
| bfd_vma addend, |
| struct score_got_info *g) |
| { |
| struct score_got_entry entry, **loc; |
| |
| entry.abfd = abfd; |
| entry.symndx = symndx; |
| entry.d.addend = addend; |
| loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); |
| |
| if (*loc) |
| return true; |
| |
| entry.gotidx = g->local_gotno++; |
| |
| *loc = bfd_alloc (abfd, sizeof(entry)); |
| if (! *loc) |
| return false; |
| |
| memcpy (*loc, &entry, sizeof (entry)); |
| |
| return true; |
| } |
| |
| /* Returns the GOT offset at which the indicated address can be found. |
| If there is not yet a GOT entry for this value, create one. |
| Returns -1 if no satisfactory GOT offset can be found. */ |
| |
| static bfd_vma |
| score_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, |
| bfd_vma value, unsigned long r_symndx, |
| struct score_elf_link_hash_entry *h, int r_type) |
| { |
| asection *sgot; |
| struct score_got_info *g; |
| struct score_got_entry *entry; |
| |
| g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); |
| |
| entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, |
| r_symndx, h, r_type); |
| if (!entry) |
| return MINUS_ONE; |
| |
| else |
| return entry->gotidx; |
| } |
| |
| /* Returns the GOT index for the global symbol indicated by H. */ |
| |
| static bfd_vma |
| score_elf_global_got_index (bfd *abfd, struct elf_link_hash_entry *h) |
| { |
| bfd_vma got_index; |
| asection *sgot; |
| struct score_got_info *g; |
| long global_got_dynindx = 0; |
| |
| g = score_elf_got_info (abfd, &sgot); |
| if (g->global_gotsym != NULL) |
| global_got_dynindx = g->global_gotsym->dynindx; |
| |
| /* Once we determine the global GOT entry with the lowest dynamic |
| symbol table index, we must put all dynamic symbols with greater |
| indices into the GOT. That makes it easy to calculate the GOT |
| offset. */ |
| BFD_ASSERT (h->dynindx >= global_got_dynindx); |
| got_index = ((h->dynindx - global_got_dynindx + g->local_gotno) * SCORE_ELF_GOT_SIZE (abfd)); |
| BFD_ASSERT (got_index < sgot->size); |
| |
| return got_index; |
| } |
| |
| /* Returns the offset for the entry at the INDEXth position in the GOT. */ |
| |
| static bfd_vma |
| score_elf_got_offset_from_index (bfd *dynobj, |
| bfd *output_bfd, |
| bfd *input_bfd ATTRIBUTE_UNUSED, |
| bfd_vma got_index) |
| { |
| asection *sgot; |
| bfd_vma gp; |
| |
| score_elf_got_info (dynobj, &sgot); |
| gp = _bfd_get_gp_value (output_bfd); |
| |
| return sgot->output_section->vma + sgot->output_offset + got_index - gp; |
| } |
| |
| /* Follow indirect and warning hash entries so that each got entry |
| points to the final symbol definition. P must point to a pointer |
| to the hash table we're traversing. Since this traversal may |
| modify the hash table, we set this pointer to NULL to indicate |
| we've made a potentially-destructive change to the hash table, so |
| the traversal must be restarted. */ |
| |
| static int |
| score_elf_resolve_final_got_entry (void **entryp, void *p) |
| { |
| struct score_got_entry *entry = (struct score_got_entry *) *entryp; |
| htab_t got_entries = *(htab_t *) p; |
| |
| if (entry->abfd != NULL && entry->symndx == -1) |
| { |
| struct score_elf_link_hash_entry *h = entry->d.h; |
| |
| while (h->root.root.type == bfd_link_hash_indirect |
| || h->root.root.type == bfd_link_hash_warning) |
| h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; |
| |
| if (entry->d.h == h) |
| return 1; |
| |
| entry->d.h = h; |
| |
| /* If we can't find this entry with the new bfd hash, re-insert |
| it, and get the traversal restarted. */ |
| if (! htab_find (got_entries, entry)) |
| { |
| htab_clear_slot (got_entries, entryp); |
| entryp = htab_find_slot (got_entries, entry, INSERT); |
| if (! *entryp) |
| *entryp = entry; |
| /* Abort the traversal, since the whole table may have |
| moved, and leave it up to the parent to restart the |
| process. */ |
| *(htab_t *) p = NULL; |
| return 0; |
| } |
| /* We might want to decrement the global_gotno count, but it's |
| either too early or too late for that at this point. */ |
| } |
| |
| return 1; |
| } |
| |
| /* Turn indirect got entries in a got_entries table into their final locations. */ |
| |
| static void |
| score_elf_resolve_final_got_entries (struct score_got_info *g) |
| { |
| htab_t got_entries; |
| |
| do |
| { |
| got_entries = g->got_entries; |
| |
| htab_traverse (got_entries, |
| score_elf_resolve_final_got_entry, |
| &got_entries); |
| } |
| while (got_entries == NULL); |
| } |
| |
| /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. for -r */ |
| |
| static void |
| score_elf_add_to_rel (bfd *abfd, |
| bfd_byte *address, |
| reloc_howto_type *howto, |
| bfd_signed_vma increment) |
| { |
| bfd_signed_vma addend; |
| bfd_vma contents; |
| unsigned long offset; |
| unsigned long r_type = howto->type; |
| unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; |
| |
| contents = bfd_get_32 (abfd, address); |
| /* Get the (signed) value from the instruction. */ |
| addend = contents & howto->src_mask; |
| if (addend & ((howto->src_mask + 1) >> 1)) |
| { |
| bfd_signed_vma mask; |
| |
| mask = -1; |
| mask &= ~howto->src_mask; |
| addend |= mask; |
| } |
| /* Add in the increment, (which is a byte value). */ |
| switch (r_type) |
| { |
| case R_SCORE_PC19: |
| offset = |
| (((contents & howto->src_mask) & 0x3ff0000) >> 6) | ((contents & howto->src_mask) & 0x3ff); |
| offset += increment; |
| contents = |
| (contents & ~howto-> |
| src_mask) | (((offset << 6) & howto->src_mask) & 0x3ff0000) | (offset & 0x3ff); |
| bfd_put_32 (abfd, contents, address); |
| break; |
| case R_SCORE_HI16: |
| break; |
| case R_SCORE_LO16: |
| hi16_addend = bfd_get_32 (abfd, address - 4); |
| hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; |
| offset = ((((contents >> 16) & 0x3) << 15) | (contents & 0x7fff)) >> 1; |
| offset = (hi16_offset << 16) | (offset & 0xffff); |
| uvalue = increment + offset; |
| hi16_offset = (uvalue >> 16) << 1; |
| hi16_value = (hi16_addend & (~(howto->dst_mask))) |
| | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| bfd_put_32 (abfd, hi16_value, address - 4); |
| offset = (uvalue & 0xffff) << 1; |
| contents = (contents & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| bfd_put_32 (abfd, contents, address); |
| break; |
| case R_SCORE_24: |
| offset = |
| (((contents & howto->src_mask) >> 1) & 0x1ff8000) | ((contents & howto->src_mask) & 0x7fff); |
| offset += increment; |
| contents = |
| (contents & ~howto-> |
| src_mask) | (((offset << 1) & howto->src_mask) & 0x3ff0000) | (offset & 0x7fff); |
| bfd_put_32 (abfd, contents, address); |
| break; |
| case R_SCORE16_11: |
| |
| contents = bfd_get_16 (abfd, address); |
| offset = contents & howto->src_mask; |
| offset += increment; |
| contents = (contents & ~howto->src_mask) | (offset & howto->src_mask); |
| bfd_put_16 (abfd, contents, address); |
| |
| break; |
| case R_SCORE16_PC8: |
| |
| contents = bfd_get_16 (abfd, address); |
| offset = (contents & howto->src_mask) + ((increment >> 1) & 0xff); |
| contents = (contents & (~howto->src_mask)) | (offset & howto->src_mask); |
| bfd_put_16 (abfd, contents, address); |
| |
| break; |
| case R_SCORE_GOT15: |
| case R_SCORE_GOT_LO16: |
| break; |
| |
| default: |
| addend += increment; |
| contents = (contents & ~howto->dst_mask) | (addend & howto->dst_mask); |
| bfd_put_32 (abfd, contents, address); |
| break; |
| } |
| } |
| |
| /* Perform a relocation as part of a final link. */ |
| |
| static bfd_reloc_status_type |
| score_elf_final_link_relocate (reloc_howto_type *howto, |
| bfd *input_bfd, |
| bfd *output_bfd, |
| asection *input_section, |
| bfd_byte *contents, |
| Elf_Internal_Rela *rel, |
| Elf_Internal_Rela *relocs, |
| bfd_vma symbol, |
| struct bfd_link_info *info, |
| const char *sym_name ATTRIBUTE_UNUSED, |
| int sym_flags ATTRIBUTE_UNUSED, |
| struct score_elf_link_hash_entry *h, |
| Elf_Internal_Sym *local_syms, |
| asection **local_sections, |
| bool gp_disp_p) |
| { |
| unsigned long r_type; |
| unsigned long r_symndx; |
| bfd_byte *hit_data = contents + rel->r_offset; |
| bfd_vma addend; |
| /* The final GP value to be used for the relocatable, executable, or |
| shared object file being produced. */ |
| bfd_vma gp = MINUS_ONE; |
| /* The place (section offset or address) of the storage unit being relocated. */ |
| bfd_vma rel_addr; |
| /* The value of GP used to create the relocatable object. */ |
| bfd_vma gp0 = MINUS_ONE; |
| /* The offset into the global offset table at which the address of the relocation entry |
| symbol, adjusted by the addend, resides during execution. */ |
| bfd_vma g = MINUS_ONE; |
| /* TRUE if the symbol referred to by this relocation is a local symbol. */ |
| bool local_p; |
| /* The eventual value we will relocate. */ |
| bfd_vma value = symbol; |
| unsigned long hi16_addend, hi16_offset, hi16_value, uvalue, offset, abs_value = 0; |
| |
| Elf_Internal_Sym *sym = 0; |
| asection *sec = NULL; |
| bool merge_p = 0; |
| |
| |
| if (elf_gp (output_bfd) == 0) |
| { |
| struct bfd_link_hash_entry *bh; |
| asection *o; |
| |
| bh = bfd_link_hash_lookup (info->hash, "_gp", 0, 0, 1); |
| if (bh != NULL && bh->type == bfd_link_hash_defined) |
| { |
| elf_gp (output_bfd) = (bh->u.def.value |
| + bh->u.def.section->output_offset); |
| if (bh->u.def.section->output_section) |
| elf_gp (output_bfd) += bh->u.def.section->output_section->vma; |
| } |
| else if (bfd_link_relocatable (info)) |
| { |
| bfd_vma lo = -1; |
| |
| /* Find the GP-relative section with the lowest offset. */ |
| for (o = output_bfd->sections; o != NULL; o = o->next) |
| if (o->vma < lo) |
| lo = o->vma; |
| /* And calculate GP relative to that. */ |
| elf_gp (output_bfd) = lo + ELF_SCORE_GP_OFFSET (input_bfd); |
| } |
| else |
| { |
| /* If the relocate_section function needs to do a reloc |
| involving the GP value, it should make a reloc_dangerous |
| callback to warn that GP is not defined. */ |
| } |
| } |
| |
| /* Parse the relocation. */ |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| r_type = ELF32_R_TYPE (rel->r_info); |
| rel_addr = (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| |
| /* For hidden symbol. */ |
| local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, false); |
| if (local_p) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| |
| symbol = sec->output_section->vma + sec->output_offset; |
| if (ELF_ST_TYPE (sym->st_info) != STT_SECTION |
| || (sec->flags & SEC_MERGE)) |
| symbol += sym->st_value; |
| if ((sec->flags & SEC_MERGE) |
| && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| merge_p = 1; |
| } |
| |
| if (r_type == R_SCORE_GOT15) |
| { |
| const Elf_Internal_Rela *relend; |
| const Elf_Internal_Rela *lo16_rel; |
| bfd_vma lo_value = 0; |
| |
| relend = relocs + input_section->reloc_count; |
| lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); |
| if ((local_p) && (lo16_rel != NULL)) |
| { |
| bfd_vma tmp = 0; |
| tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); |
| lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); |
| if (merge_p) |
| { |
| asection *msec = sec; |
| lo_value = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, lo_value); |
| lo_value -= symbol; |
| lo_value += msec->output_section->vma + msec->output_offset; |
| } |
| } |
| addend = lo_value; |
| } |
| else |
| { |
| addend = (bfd_get_32 (input_bfd, hit_data) >> howto->bitpos) & howto->src_mask; |
| } |
| |
| /* Figure out the value of the symbol. */ |
| if (local_p && !merge_p) |
| { |
| if (r_type == R_SCORE_GOT15) |
| { |
| const Elf_Internal_Rela *relend; |
| const Elf_Internal_Rela *lo16_rel; |
| bfd_vma lo_value = 0; |
| |
| value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| addend = value & 0x7fff; |
| if ((addend & 0x4000) == 0x4000) |
| addend |= 0xffffc000; |
| |
| relend = relocs + input_section->reloc_count; |
| lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); |
| if ((local_p) && (lo16_rel != NULL)) |
| { |
| bfd_vma tmp = 0; |
| tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); |
| lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); |
| } |
| |
| addend <<= 16; |
| addend += lo_value; |
| } |
| } |
| |
| local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, true); |
| |
| /* If we haven't already determined the GOT offset, or the GP value, |
| and we're going to need it, get it now. */ |
| switch (r_type) |
| { |
| case R_SCORE_CALL15: |
| case R_SCORE_GOT15: |
| if (!local_p) |
| { |
| g = score_elf_global_got_index (elf_hash_table (info)->dynobj, |
| (struct elf_link_hash_entry *) h); |
| if ((! elf_hash_table(info)->dynamic_sections_created |
| || (bfd_link_pic (info) |
| && (info->symbolic || h->root.dynindx == -1) |
| && h->root.def_regular))) |
| { |
| /* This is a static link or a -Bsymbolic link. The |
| symbol is defined locally, or was forced to be local. |
| We must initialize this entry in the GOT. */ |
| bfd *tmpbfd = elf_hash_table (info)->dynobj; |
| asection *sgot = score_elf_got_section (tmpbfd, false); |
| bfd_put_32 (tmpbfd, value, sgot->contents + g); |
| } |
| } |
| else if (r_type == R_SCORE_GOT15 || r_type == R_SCORE_CALL15) |
| { |
| /* There's no need to create a local GOT entry here; the |
| calculation for a local GOT15 entry does not involve G. */ |
| ; |
| } |
| else |
| { |
| g = score_elf_local_got_index (output_bfd, input_bfd, info, |
| symbol + addend, r_symndx, h, r_type); |
| if (g == MINUS_ONE) |
| return bfd_reloc_outofrange; |
| } |
| |
| /* Convert GOT indices to actual offsets. */ |
| g = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, |
| output_bfd, input_bfd, g); |
| break; |
| |
| case R_SCORE_HI16: |
| case R_SCORE_LO16: |
| case R_SCORE_GPREL32: |
| gp0 = _bfd_get_gp_value (input_bfd); |
| gp = _bfd_get_gp_value (output_bfd); |
| break; |
| |
| case R_SCORE_GP15: |
| gp = _bfd_get_gp_value (output_bfd); |
| |
| default: |
| break; |
| } |
| |
| switch (r_type) |
| { |
| case R_SCORE_NONE: |
| return bfd_reloc_ok; |
| |
| case R_SCORE_ABS32: |
| case R_SCORE_REL32: |
| if ((bfd_link_pic (info) |
| || (elf_hash_table (info)->dynamic_sections_created |
| && h != NULL |
| && h->root.def_dynamic |
| && !h->root.def_regular)) |
| && r_symndx != STN_UNDEF |
| && (input_section->flags & SEC_ALLOC) != 0) |
| { |
| /* If we're creating a shared library, or this relocation is against a symbol |
| in a shared library, then we can't know where the symbol will end up. |
| So, we create a relocation record in the output, and leave the job up |
| to the dynamic linker. */ |
| value = addend; |
| if (!score_elf_create_dynamic_relocation (output_bfd, info, rel, h, |
| symbol, &value, |
| input_section)) |
| return bfd_reloc_undefined; |
| } |
| else if (r_symndx == STN_UNDEF) |
| /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols |
| from removed linkonce sections, or sections discarded by |
| a linker script. */ |
| value = 0; |
| else |
| { |
| if (r_type != R_SCORE_REL32) |
| value = symbol + addend; |
| else |
| value = addend; |
| } |
| value &= howto->dst_mask; |
| bfd_put_32 (input_bfd, value, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_ABS16: |
| value += addend; |
| if ((long) value > 0x7fff || (long) value < -0x8000) |
| return bfd_reloc_overflow; |
| bfd_put_16 (input_bfd, value, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_24: |
| addend = bfd_get_32 (input_bfd, hit_data); |
| offset = (((addend & howto->src_mask) >> 1) & 0x1ff8000) | ((addend & howto->src_mask) & 0x7fff); |
| if ((offset & 0x1000000) != 0) |
| offset |= 0xfe000000; |
| value += offset; |
| abs_value = value - rel_addr; |
| if ((abs_value & 0xfe000000) != 0) |
| return bfd_reloc_overflow; |
| addend = (addend & ~howto->src_mask) |
| | (((value << 1) & howto->src_mask) & 0x3ff0000) | (value & 0x7fff); |
| bfd_put_32 (input_bfd, addend, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_PC19: |
| addend = bfd_get_32 (input_bfd, hit_data); |
| offset = (((addend & howto->src_mask) & 0x3ff0000) >> 6) | ((addend & howto->src_mask) & 0x3ff); |
| if ((offset & 0x80000) != 0) |
| offset |= 0xfff00000; |
| abs_value = value = value - rel_addr + offset; |
| /* exceed 20 bit : overflow. */ |
| if ((abs_value & 0x80000000) == 0x80000000) |
| abs_value = 0xffffffff - value + 1; |
| if ((abs_value & 0xfff80000) != 0) |
| return bfd_reloc_overflow; |
| addend = (addend & ~howto->src_mask) |
| | (((value << 6) & howto->src_mask) & 0x3ff0000) | (value & 0x3ff); |
| bfd_put_32 (input_bfd, addend, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE16_11: |
| addend = bfd_get_16 (input_bfd, hit_data); |
| offset = addend & howto->src_mask; |
| if ((offset & 0x800) != 0) /* Offset is negative. */ |
| offset |= 0xfffff000; |
| value += offset; |
| abs_value = value - rel_addr; |
| if ((abs_value & 0xfffff000) != 0) |
| return bfd_reloc_overflow; |
| addend = (addend & ~howto->src_mask) | (value & howto->src_mask); |
| bfd_put_16 (input_bfd, addend, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE16_PC8: |
| addend = bfd_get_16 (input_bfd, hit_data); |
| offset = (addend & howto->src_mask) << 1; |
| if ((offset & 0x100) != 0) /* Offset is negative. */ |
| offset |= 0xfffffe00; |
| abs_value = value = value - rel_addr + offset; |
| /* Sign bit + exceed 9 bit. */ |
| if (((value & 0xffffff00) != 0) && ((value & 0xffffff00) != 0xffffff00)) |
| return bfd_reloc_overflow; |
| value >>= 1; |
| addend = (addend & ~howto->src_mask) | (value & howto->src_mask); |
| bfd_put_16 (input_bfd, addend, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_HI16: |
| return bfd_reloc_ok; |
| |
| case R_SCORE_LO16: |
| hi16_addend = bfd_get_32 (input_bfd, hit_data - 4); |
| hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; |
| addend = bfd_get_32 (input_bfd, hit_data); |
| offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; |
| offset = (hi16_offset << 16) | (offset & 0xffff); |
| |
| if (!gp_disp_p) |
| uvalue = value + offset; |
| else |
| uvalue = offset + gp - rel_addr + 4; |
| |
| hi16_offset = (uvalue >> 16) << 1; |
| hi16_value = (hi16_addend & (~(howto->dst_mask))) |
| | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| bfd_put_32 (input_bfd, hi16_value, hit_data - 4); |
| offset = (uvalue & 0xffff) << 1; |
| value = (addend & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| bfd_put_32 (input_bfd, value, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_GP15: |
| addend = bfd_get_32 (input_bfd, hit_data); |
| offset = addend & 0x7fff; |
| if ((offset & 0x4000) == 0x4000) |
| offset |= 0xffffc000; |
| value = value + offset - gp; |
| if (((value & 0xffffc000) != 0) && ((value & 0xffffc000) != 0xffffc000)) |
| return bfd_reloc_overflow; |
| value = (addend & ~howto->src_mask) | (value & howto->src_mask); |
| bfd_put_32 (input_bfd, value, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_GOT15: |
| case R_SCORE_CALL15: |
| if (local_p) |
| { |
| bool forced; |
| |
| /* The special case is when the symbol is forced to be local. We need the |
| full address in the GOT since no R_SCORE_GOT_LO16 relocation follows. */ |
| forced = ! score_elf_local_relocation_p (input_bfd, rel, |
| local_sections, false); |
| value = score_elf_got16_entry (output_bfd, input_bfd, info, |
| symbol + addend, forced); |
| if (value == MINUS_ONE) |
| return bfd_reloc_outofrange; |
| value = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, |
| output_bfd, input_bfd, value); |
| } |
| else |
| { |
| value = g; |
| } |
| |
| if ((long) value > 0x3fff || (long) value < -0x4000) |
| return bfd_reloc_overflow; |
| |
| addend = bfd_get_32 (input_bfd, hit_data); |
| value = (addend & ~howto->dst_mask) | (value & howto->dst_mask); |
| bfd_put_32 (input_bfd, value, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_GPREL32: |
| value = (addend + symbol + gp0 - gp); |
| value &= howto->dst_mask; |
| bfd_put_32 (input_bfd, value, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_GOT_LO16: |
| addend = bfd_get_32 (input_bfd, hit_data); |
| value = (((addend >> 16) & 0x3) << 14) | ((addend & 0x7fff) >> 1); |
| value += symbol; |
| value = (addend & (~(howto->dst_mask))) | ((value & 0x3fff) << 1) |
| | (((value >> 14) & 0x3) << 16); |
| |
| bfd_put_32 (input_bfd, value, hit_data); |
| return bfd_reloc_ok; |
| |
| case R_SCORE_DUMMY_HI16: |
| return bfd_reloc_ok; |
| |
| case R_SCORE_GNU_VTINHERIT: |
| case R_SCORE_GNU_VTENTRY: |
| /* We don't do anything with these at present. */ |
| return bfd_reloc_continue; |
| |
| default: |
| return bfd_reloc_notsupported; |
| } |
| } |
| |
| /* Score backend functions. */ |
| |
| bool |
| s7_bfd_score_info_to_howto (bfd *abfd, |
| arelent *bfd_reloc, |
| Elf_Internal_Rela *elf_reloc) |
| { |
| unsigned int r_type; |
| |
| r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| if (r_type >= ARRAY_SIZE (elf32_score_howto_table)) |
| { |
| /* xgettext:c-format */ |
| _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| abfd, r_type); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| bfd_reloc->howto = &elf32_score_howto_table[r_type]; |
| return true; |
| } |
| |
| /* Relocate an score ELF section. */ |
| |
| int |
| s7_bfd_score_elf_relocate_section (bfd *output_bfd, |
| struct bfd_link_info *info, |
| bfd *input_bfd, |
| asection *input_section, |
| bfd_byte *contents, |
| Elf_Internal_Rela *relocs, |
| Elf_Internal_Sym *local_syms, |
| asection **local_sections) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Rela *rel; |
| Elf_Internal_Rela *relend; |
| const char *name; |
| unsigned long offset; |
| unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; |
| size_t extsymoff; |
| bool gp_disp_p = false; |
| |
| /* Sort dynsym. */ |
| if (elf_hash_table (info)->dynamic_sections_created) |
| { |
| bfd_size_type dynsecsymcount = 0; |
| if (bfd_link_pic (info)) |
| { |
| asection * p; |
| const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
| |
| for (p = output_bfd->sections; p ; p = p->next) |
| if ((p->flags & SEC_EXCLUDE) == 0 |
| && (p->flags & SEC_ALLOC) != 0 |
| && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) |
| ++ dynsecsymcount; |
| } |
| |
| if (!score_elf_sort_hash_table (info, dynsecsymcount + 1)) |
| return false; |
| } |
| |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info; |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| int r_type; |
| reloc_howto_type *howto; |
| unsigned long r_symndx; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| struct score_elf_link_hash_entry *h; |
| bfd_vma relocation = 0; |
| bfd_reloc_status_type r; |
| arelent bfd_reloc; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| r_type = ELF32_R_TYPE (rel->r_info); |
| |
| if (! s7_bfd_score_info_to_howto (input_bfd, &bfd_reloc, (Elf_Internal_Rela *) rel)) |
| continue; |
| howto = bfd_reloc.howto; |
| |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| |
| if (r_symndx < extsymoff) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| relocation = sec->output_section->vma + sec->output_offset; |
| name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| |
| if (!bfd_link_relocatable (info)) |
| { |
| if (ELF_ST_TYPE (sym->st_info) != STT_SECTION |
| || (sec->flags & SEC_MERGE)) |
| { |
| relocation += sym->st_value; |
| } |
| |
| if ((sec->flags & SEC_MERGE) |
| && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| { |
| asection *msec; |
| bfd_vma addend, value; |
| |
| switch (r_type) |
| { |
| case R_SCORE_HI16: |
| break; |
| case R_SCORE_LO16: |
| hi16_addend = bfd_get_32 (input_bfd, contents + rel->r_offset - 4); |
| hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; |
| value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| offset = ((((value >> 16) & 0x3) << 15) | (value & 0x7fff)) >> 1; |
| addend = (hi16_offset << 16) | (offset & 0xffff); |
| msec = sec; |
| addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend); |
| addend -= relocation; |
| addend += msec->output_section->vma + msec->output_offset; |
| uvalue = addend; |
| hi16_offset = (uvalue >> 16) << 1; |
| hi16_value = (hi16_addend & (~(howto->dst_mask))) |
| | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| bfd_put_32 (input_bfd, hi16_value, contents + rel->r_offset - 4); |
| offset = (uvalue & 0xffff) << 1; |
| value = (value & (~(howto->dst_mask))) |
| | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| break; |
| case R_SCORE_GOT_LO16: |
| value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| addend = (((value >> 16) & 0x3) << 14) | ((value & 0x7fff) >> 1); |
| msec = sec; |
| addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; |
| addend += msec->output_section->vma + msec->output_offset; |
| value = (value & (~(howto->dst_mask))) | ((addend & 0x3fff) << 1) |
| | (((addend >> 14) & 0x3) << 16); |
| |
| bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| break; |
| default: |
| value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| /* Get the (signed) value from the instruction. */ |
| addend = value & howto->src_mask; |
| if (addend & ((howto->src_mask + 1) >> 1)) |
| { |
| bfd_signed_vma mask; |
| |
| mask = -1; |
| mask &= ~howto->src_mask; |
| addend |= mask; |
| } |
| msec = sec; |
| addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; |
| addend += msec->output_section->vma + msec->output_offset; |
| value = (value & ~howto->dst_mask) | (addend & howto->dst_mask); |
| bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| break; |
| } |
| } |
| } |
| } |
| else |
| { |
| /* For global symbols we look up the symbol in the hash-table. */ |
| h = ((struct score_elf_link_hash_entry *) |
| elf_sym_hashes (input_bfd) [r_symndx - extsymoff]); |
| |
| if (info->wrap_hash != NULL |
| && (input_section->flags & SEC_DEBUGGING) != 0) |
| h = ((struct score_elf_link_hash_entry *) |
| unwrap_hash_lookup (info, input_bfd, &h->root.root)); |
| |
| /* Find the real hash-table entry for this symbol. */ |
| while (h->root.root.type == bfd_link_hash_indirect |
| || h->root.root.type == bfd_link_hash_warning) |
| h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; |
| |
| /* Record the name of this symbol, for our caller. */ |
| name = h->root.root.root.string; |
| |
| /* See if this is the special GP_DISP_LABEL symbol. Note that such a |
| symbol must always be a global symbol. */ |
| if (strcmp (name, GP_DISP_LABEL) == 0) |
| { |
| /* Relocations against GP_DISP_LABEL are permitted only with |
| R_SCORE_HI16 and R_SCORE_LO16 relocations. */ |
| if (r_type != R_SCORE_HI16 && r_type != R_SCORE_LO16) |
| return bfd_reloc_notsupported; |
| |
| gp_disp_p = true; |
| } |
| |
| /* If this symbol is defined, calculate its address. Note that |
| GP_DISP_LABEL is a magic symbol, always implicitly defined by the |
| linker, so it's inappropriate to check to see whether or not |
| its defined. */ |
| else if ((h->root.root.type == bfd_link_hash_defined |
| || h->root.root.type == bfd_link_hash_defweak) |
| && h->root.root.u.def.section) |
| { |
| sec = h->root.root.u.def.section; |
| if (sec->output_section) |
| relocation = (h->root.root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| else |
| { |
| relocation = h->root.root.u.def.value; |
| } |
| } |
| else if (h->root.root.type == bfd_link_hash_undefweak) |
| /* We allow relocations against undefined weak symbols, giving |
| it the value zero, so that you can undefined weak functions |
| and check to see if they exist by looking at their addresses. */ |
| relocation = 0; |
| else if (info->unresolved_syms_in_objects == RM_IGNORE |
| && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT) |
| relocation = 0; |
| else if (strcmp (name, "_DYNAMIC_LINK") == 0) |
| { |
| /* If this is a dynamic link, we should have created a _DYNAMIC_LINK symbol |
| in s7_bfd_score_elf_create_dynamic_sections. Otherwise, we should define |
| the symbol with a value of 0. */ |
| BFD_ASSERT (! bfd_link_pic (info)); |
| BFD_ASSERT (bfd_get_section_by_name (output_bfd, ".dynamic") == NULL); |
| relocation = 0; |
| } |
| else if (!bfd_link_relocatable (info)) |
| { |
| info->callbacks->undefined_symbol |
| (info, h->root.root.root.string, input_bfd, input_section, |
| rel->r_offset, |
| (info->unresolved_syms_in_objects == RM_DIAGNOSE |
| && !info->warn_unresolved_syms) |
| || ELF_ST_VISIBILITY (h->root.other)); |
| relocation = 0; |
| } |
| } |
| |
| if (sec != NULL && discarded_section (sec)) |
| RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| rel, 1, relend, howto, 0, contents); |
| |
| if (bfd_link_relocatable (info)) |
| { |
| /* This is a relocatable link. We don't have to change |
| anything, unless the reloc is against a section symbol, |
| in which case we have to adjust according to where the |
| section symbol winds up in the output section. */ |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| |
| if (r_type == R_SCORE_GOT15) |
| { |
| const Elf_Internal_Rela *lo16_rel; |
| bfd_vma lo_addend = 0, lo_value = 0; |
| bfd_vma addend, value; |
| |
| value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| addend = value & 0x7fff; |
| if ((addend & 0x4000) == 0x4000) |
| addend |= 0xffffc000; |
| |
| relend = relocs + input_section->reloc_count; |
| lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); |
| if (lo16_rel != NULL) |
| { |
| lo_value = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); |
| lo_addend = (((lo_value >> 16) & 0x3) << 14) | ((lo_value & 0x7fff) >> 1); |
| } |
| |
| addend <<= 16; |
| addend += lo_addend; |
| |
| if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| addend += local_sections[r_symndx]->output_offset; |
| |
| lo_addend = addend & 0xffff; |
| lo_value = (lo_value & (~(howto->dst_mask))) | ((lo_addend & 0x3fff) << 1) |
| | (((lo_addend >> 14) & 0x3) << 16); |
| bfd_put_32 (input_bfd, lo_value, contents + lo16_rel->r_offset); |
| |
| addend = addend >> 16; |
| value = (value & ~howto->src_mask) | (addend & howto->src_mask); |
| bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| } |
| else if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| { |
| sec = local_sections[r_symndx]; |
| score_elf_add_to_rel (input_bfd, contents + rel->r_offset, |
| howto, (bfd_signed_vma) (sec->output_offset + sym->st_value)); |
| } |
| } |
| continue; |
| } |
| |
| /* This is a final link. */ |
| r = score_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| input_section, contents, rel, relocs, |
| relocation, info, name, |
| (h ? ELF_ST_TYPE ((unsigned int) h->root.root.type) : |
| ELF_ST_TYPE ((unsigned int) sym->st_info)), h, local_syms, |
| local_sections, gp_disp_p); |
| |
| if (r != bfd_reloc_ok) |
| { |
| const char *msg = (const char *)0; |
| |
| switch (r) |
| { |
| case bfd_reloc_overflow: |
| /* If the overflowing reloc was to an undefined symbol, |
| we have already printed one error message and there |
| is no point complaining again. */ |
| if (!h || h->root.root.type != bfd_link_hash_undefined) |
| (*info->callbacks->reloc_overflow) |
| (info, NULL, name, howto->name, (bfd_vma) 0, |
| input_bfd, input_section, rel->r_offset); |
| break; |
| case bfd_reloc_undefined: |
| (*info->callbacks->undefined_symbol) |
| (info, name, input_bfd, input_section, rel->r_offset, true); |
| break; |
| |
| case bfd_reloc_outofrange: |
| msg = _("internal error: out of range error"); |
| goto common_error; |
| |
| case bfd_reloc_notsupported: |
| msg = _("internal error: unsupported relocation error"); |
| goto common_error; |
| |
| case bfd_reloc_dangerous: |
| msg = _("internal error: dangerous error"); |
| goto common_error; |
| |
| default: |
| msg = _("internal error: unknown error"); |
| /* Fall through. */ |
| |
| common_error: |
| (*info->callbacks->warning) (info, msg, name, input_bfd, |
| input_section, rel->r_offset); |
| break; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Look through the relocs for a section during the first phase, and |
| allocate space in the global offset table. */ |
| |
| bool |
| s7_bfd_score_elf_check_relocs (bfd *abfd, |
| struct bfd_link_info *info, |
| asection *sec, |
| const Elf_Internal_Rela *relocs) |
| { |
| bfd *dynobj; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| struct score_got_info *g; |
| size_t extsymoff; |
| const Elf_Internal_Rela *rel; |
| const Elf_Internal_Rela *rel_end; |
| asection *sgot; |
| asection *sreloc; |
| |
| if (bfd_link_relocatable (info)) |
| return true; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info; |
| |
| if (dynobj == NULL) |
| { |
| sgot = NULL; |
| g = NULL; |
| } |
| else |
| { |
| sgot = score_elf_got_section (dynobj, false); |
| if (sgot == NULL) |
| g = NULL; |
| else |
| { |
| BFD_ASSERT (score_elf_section_data (sgot) != NULL); |
| g = score_elf_section_data (sgot)->u.got_info; |
| BFD_ASSERT (g != NULL); |
| } |
| } |
| |
| sreloc = NULL; |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; ++rel) |
| { |
| unsigned long r_symndx; |
| unsigned int r_type; |
| struct elf_link_hash_entry *h; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| r_type = ELF32_R_TYPE (rel->r_info); |
| |
| if (r_symndx < extsymoff) |
| { |
| h = NULL; |
| } |
| else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr)) |
| { |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB: malformed reloc detected for section %pA"), abfd, sec); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| else |
| { |
| h = sym_hashes[r_symndx - extsymoff]; |
| |
| /* This may be an indirect symbol created because of a version. */ |
| if (h != NULL) |
| { |
| while (h->root.type == bfd_link_hash_indirect) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| } |
| } |
| |
| /* Some relocs require a global offset table. */ |
| if (dynobj == NULL || sgot == NULL) |
| { |
| switch (r_type) |
| { |
| case R_SCORE_GOT15: |
| case R_SCORE_CALL15: |
| if (dynobj == NULL) |
| elf_hash_table (info)->dynobj = dynobj = abfd; |
| if (!score_elf_create_got_section (dynobj, info, false)) |
| return false; |
| g = score_elf_got_info (dynobj, &sgot); |
| break; |
| case R_SCORE_ABS32: |
| case R_SCORE_REL32: |
| if (dynobj == NULL |
| && (bfd_link_pic (info) || h != NULL) |
| && (sec->flags & SEC_ALLOC) != 0) |
| elf_hash_table (info)->dynobj = dynobj = abfd; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (!h && (r_type == R_SCORE_GOT_LO16)) |
| { |
| if (! score_elf_record_local_got_symbol (abfd, r_symndx, rel->r_addend, g)) |
| return false; |
| } |
| |
| switch (r_type) |
| { |
| case R_SCORE_CALL15: |
| if (h == NULL) |
| { |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB: CALL15 reloc at %#" PRIx64 " not against global symbol"), |
| abfd, (uint64_t) rel->r_offset); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| else |
| { |
| /* This symbol requires a global offset table entry. */ |
| if (! score_elf_record_global_got_symbol (h, abfd, info, g)) |
| return false; |
| |
| /* We need a stub, not a plt entry for the undefined function. But we record |
| it as if it needs plt. See _bfd_elf_adjust_dynamic_symbol. */ |
| h->needs_plt = 1; |
| h->type = STT_FUNC; |
| } |
| break; |
| case R_SCORE_GOT15: |
| if (h && ! score_elf_record_global_got_symbol (h, abfd, info, g)) |
| return false; |
| break; |
| case R_SCORE_ABS32: |
| case R_SCORE_REL32: |
| if ((bfd_link_pic (info) || h != NULL) |
| && (sec->flags & SEC_ALLOC) != 0) |
| { |
| if (sreloc == NULL) |
| { |
| sreloc = score_elf_rel_dyn_section (dynobj, true); |
| if (sreloc == NULL) |
| return false; |
| } |
| #define SCORE_READONLY_SECTION (SEC_ALLOC | SEC_LOAD | SEC_READONLY) |
| if (bfd_link_pic (info)) |
| { |
| /* When creating a shared object, we must copy these reloc types into |
| the output file as R_SCORE_REL32 relocs. We make room for this reloc |
| in the .rel.dyn reloc section. */ |
| score_elf_allocate_dynamic_relocations (dynobj, 1); |
| if ((sec->flags & SCORE_READONLY_SECTION) |
| == SCORE_READONLY_SECTION) |
| /* We tell the dynamic linker that there are |
| relocations against the text segment. */ |
| info->flags |= DF_TEXTREL; |
| } |
| else |
| { |
| struct score_elf_link_hash_entry *hscore; |
| |
| /* We only need to copy this reloc if the symbol is |
| defined in a dynamic object. */ |
| hscore = (struct score_elf_link_hash_entry *) h; |
| ++hscore->possibly_dynamic_relocs; |
| if ((sec->flags & SCORE_READONLY_SECTION) |
| == SCORE_READONLY_SECTION) |
| /* We need it to tell the dynamic linker if there |
| are relocations against the text segment. */ |
| hscore->readonly_reloc = true; |
| } |
| |
| /* Even though we don't directly need a GOT entry for this symbol, |
| a symbol must have a dynamic symbol table index greater that |
| DT_SCORE_GOTSYM if there are dynamic relocations against it. */ |
| if (h != NULL) |
| { |
| if (dynobj == NULL) |
| elf_hash_table (info)->dynobj = dynobj = abfd; |
| if (! score_elf_create_got_section (dynobj, info, true)) |
| return false; |
| g = score_elf_got_info (dynobj, &sgot); |
| if (! score_elf_record_global_got_symbol (h, abfd, info, g)) |
| return false; |
| } |
| } |
| break; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_SCORE_GNU_VTINHERIT: |
| if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| return false; |
| break; |
| |
| /* This relocation describes which C++ vtable entries are actually |
| used. Record for later use during GC. */ |
| case R_SCORE_GNU_VTENTRY: |
| if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| return false; |
| break; |
| default: |
| break; |
| } |
| |
| /* We must not create a stub for a symbol that has relocations |
| related to taking the function's address. */ |
| switch (r_type) |
| { |
| default: |
| if (h != NULL) |
| { |
| struct score_elf_link_hash_entry *sh; |
| |
| sh = (struct score_elf_link_hash_entry *) h; |
| sh->no_fn_stub = true; |
| } |
| break; |
| case R_SCORE_CALL15: |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool |
| s7_bfd_score_elf_add_symbol_hook (bfd *abfd, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| Elf_Internal_Sym *sym, |
| const char **namep ATTRIBUTE_UNUSED, |
| flagword *flagsp ATTRIBUTE_UNUSED, |
| asection **secp, |
| bfd_vma *valp) |
| { |
| switch (sym->st_shndx) |
| { |
| case SHN_COMMON: |
| if (sym->st_size > elf_gp_size (abfd)) |
| break; |
| /* Fall through. */ |
| case SHN_SCORE_SCOMMON: |
| *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| (*secp)->flags |= SEC_IS_COMMON | SEC_SMALL_DATA; |
| *valp = sym->st_size; |
| break; |
| } |
| |
| return true; |
| } |
| |
| void |
| s7_bfd_score_elf_symbol_processing (bfd *abfd, asymbol *asym) |
| { |
| elf_symbol_type *elfsym; |
| |
| elfsym = (elf_symbol_type *) asym; |
| switch (elfsym->internal_elf_sym.st_shndx) |
| { |
| case SHN_COMMON: |
| if (asym->value > elf_gp_size (abfd)) |
| break; |
| /* Fall through. */ |
| case SHN_SCORE_SCOMMON: |
| asym->section = &score_elf_scom_section; |
| asym->value = elfsym->internal_elf_sym.st_size; |
| break; |
| } |
| } |
| |
| int |
| s7_bfd_score_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| const char *name ATTRIBUTE_UNUSED, |
| Elf_Internal_Sym *sym, |
| asection *input_sec, |
| struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) |
| { |
| /* If we see a common symbol, which implies a relocatable link, then |
| if a symbol was small common in an input file, mark it as small |
| common in the output file. */ |
| if (sym->st_shndx == SHN_COMMON && strcmp (input_sec->name, ".scommon") == 0) |
| sym->st_shndx = SHN_SCORE_SCOMMON; |
| |
| return 1; |
| } |
| |
| bool |
| s7_bfd_score_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
| asection *sec, |
| int *retval) |
| { |
| if (strcmp (bfd_section_name (sec), ".scommon") == 0) |
| { |
| *retval = SHN_SCORE_SCOMMON; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* Adjust a symbol defined by a dynamic object and referenced by a |
| regular object. The current definition is in some section of the |
| dynamic object, but we're not including those sections. We have to |
| change the definition to something the rest of the link can understand. */ |
| |
| bool |
| s7_bfd_score_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *h) |
| { |
| bfd *dynobj; |
| struct score_elf_link_hash_entry *hscore; |
| asection *s; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| |
| /* Make sure we know what is going on here. */ |
| BFD_ASSERT (dynobj != NULL |
| && (h->needs_plt |
| || h->is_weakalias |
| || (h->def_dynamic && h->ref_regular && !h->def_regular))); |
| |
| /* If this symbol is defined in a dynamic object, we need to copy |
| any R_SCORE_ABS32 or R_SCORE_REL32 relocs against it into the output |
| file. */ |
| hscore = (struct score_elf_link_hash_entry *) h; |
| if (!bfd_link_relocatable (info) |
| && hscore->possibly_dynamic_relocs != 0 |
| && (h->root.type == bfd_link_hash_defweak || !h->def_regular)) |
| { |
| score_elf_allocate_dynamic_relocations (dynobj, hscore->possibly_dynamic_relocs); |
| if (hscore->readonly_reloc) |
| /* We tell the dynamic linker that there are relocations |
| against the text segment. */ |
| info->flags |= DF_TEXTREL; |
| } |
| |
| /* For a function, create a stub, if allowed. */ |
| if (!hscore->no_fn_stub && h->needs_plt) |
| { |
| if (!elf_hash_table (info)->dynamic_sections_created) |
| return true; |
| |
| /* If this symbol is not defined in a regular file, then set |
| the symbol to the stub location. This is required to make |
| function pointers compare as equal between the normal |
| executable and the shared library. */ |
| if (!h->def_regular) |
| { |
| /* We need .stub section. */ |
| s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME); |
| BFD_ASSERT (s != NULL); |
| |
| h->root.u.def.section = s; |
| h->root.u.def.value = s->size; |
| |
| /* XXX Write this stub address somewhere. */ |
| h->plt.offset = s->size; |
| |
| /* Make room for this stub code. */ |
| s->size += SCORE_FUNCTION_STUB_SIZE; |
| |
| /* The last half word of the stub will be filled with the index |
| of this symbol in .dynsym section. */ |
| return true; |
| } |
| } |
| else if ((h->type == STT_FUNC) && !h->needs_plt) |
| { |
| /* This will set the entry for this symbol in the GOT to 0, and |
| the dynamic linker will take care of this. */ |
| h->root.u.def.value = 0; |
| return true; |
| } |
| |
| /* If this is a weak symbol, and there is a real definition, the |
| processor independent code will have arranged for us to see the |
| real definition first, and we can just use the same value. */ |
| if (h->is_weakalias) |
| { |
| struct elf_link_hash_entry *def = weakdef (h); |
| BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| h->root.u.def.section = def->root.u.def.section; |
| h->root.u.def.value = def->root.u.def.value; |
| return true; |
| } |
| |
| /* This is a reference to a symbol defined by a dynamic object which |
| is not a function. */ |
| return true; |
| } |
| |
| /* This function is called after all the input files have been read, |
| and the input sections have been assigned to output sections. */ |
| |
| bool |
| s7_bfd_score_elf_always_size_sections (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| bfd *dynobj; |
| asection *s; |
| struct score_got_info *g; |
| int i; |
| bfd_size_type loadable_size = 0; |
| bfd_size_type local_gotno; |
| bfd *sub; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| if (dynobj == NULL) |
| /* Relocatable links don't have it. */ |
| return tr
|