diff options
| -rw-r--r-- | bfd/ChangeLog | 27 | ||||
| -rw-r--r-- | bfd/elf32-mips.c | 371 |
2 files changed, 249 insertions, 149 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 1b146bf..eee678f 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,32 @@ 1999-06-27 Mark Mitchell <mark@codesourcery.com> + * elf32-mips.c (MIPS_ELF_SRDATA_SECTION_NAME): New macro. + (MIPS_ELF_OPTIONS_SECTION_NAME): Likewise. + (MIPS_ELF_STUB_SECTION_NAME): Likewise. + (_bfd_mips_elf_section_from_shdr): Use them. + (_bfd_mips_elf_fake_sections): Likewise. Add .srdata to the list + of GP-relative sections. + (_bfd_mips_elf_set_section_contents): Use them. + (_bfd_mips_elf_section_processing): Share code between .sdata and + .lit4/.lit8 sections. Set appropriate flags for .srdata. + (mips_elf_additional_program_headers): Add handling for + PT_MIPS_OPTIONS segment on IRIX6. + (mips_elf_modify_segment_map): Likeiwse. + (mips_elf_final_link): Set EF_MIPS_CPIC when required by the ABI. + Include the options sections on IRIX6. Don't look for GP-relative + sections by name; use SHF_MIPS_GPREL instead. + (ELF_DYNAMIC_INTERPRETER): Adjust to use /usr/lib32/libc.so.1 for + the N32 ABI. + (mips_elf_create_dynamic_sections): Don't muck about with section + alignments and such on IRIX6. + (mips_elf_adjust_dynamic_symbol): Use MIPS_ELF_STUB_SECTION_NAME. + (mips_elf_size_dynamic_sections): Likewise. Adjust to handle the + fact that ELF_DYNAMIC_INTERPRETER is no longer a constant. Use + bfd_zalloc rather than bfd_alloc and memset. + (mips_elf_finish_dynamic_symbol): Use MIPS_ELF_STUB_SECTION_NAME. + Don't assert the existence of .rld_map on IRIX6. + (mips_elf_finish_dynamic_sections): Use MIPS_ELF_STUB_SECTION_NAME. + * elf32-mips.c (mips_elf_adjust_dynindx): Remove. (mips_elf_size_dynamic_sections): Use _bfd_elf_link_adjust_dynindx instead. diff --git a/bfd/elf32-mips.c b/bfd/elf32-mips.c index 17c057b..c152e8a 100644 --- a/bfd/elf32-mips.c +++ b/bfd/elf32-mips.c @@ -170,6 +170,17 @@ struct mips_got_info /* The name of the msym section. */ #define MIPS_ELF_MSYM_SECTION_NAME(abfd) ".msym" +/* The name of the srdata section. */ +#define MIPS_ELF_SRDATA_SECTION_NAME(abfd) ".srdata" + +/* The name of the options section. */ +#define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \ + (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.options" : ".options") + +/* The name of the stub section. */ +#define MIPS_ELF_STUB_SECTION_NAME(abfd) \ + (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.stubs" : ".stub") + /* The number of local .got entries we reserve. */ #define MIPS_RESERVED_GOTNO (2) @@ -2449,8 +2460,7 @@ _bfd_mips_elf_section_from_shdr (abfd, hdr, name) return false; break; case SHT_MIPS_OPTIONS: - if (strcmp (name, ".options") != 0 - && strcmp (name, ".MIPS.options") != 0) + if (strcmp (name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) != 0) return false; break; case SHT_MIPS_DWARF: @@ -2627,6 +2637,7 @@ _bfd_mips_elf_fake_sections (abfd, hdr, sec) #endif } else if (strcmp (name, ".got") == 0 + || strcmp (name, MIPS_ELF_SRDATA_SECTION_NAME (abfd)) == 0 || strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0 || strcmp (name, ".lit4") == 0 @@ -2643,8 +2654,7 @@ _bfd_mips_elf_fake_sections (abfd, hdr, sec) hdr->sh_flags |= SHF_MIPS_NOSTRIP; /* The sh_info field is set in final_write_processing. */ } - else if (strcmp (name, ".options") == 0 - || strcmp (name, ".MIPS.options") == 0) + else if (strcmp (name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0) { hdr->sh_type = SHT_MIPS_OPTIONS; hdr->sh_entsize = 1; @@ -2714,8 +2724,7 @@ _bfd_mips_elf_set_section_contents (abfd, section, location, offset, count) file_ptr offset; bfd_size_type count; { - if (strcmp (section->name, ".options") == 0 - || strcmp (section->name, ".MIPS.options") == 0) + if (strcmp (section->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0) { bfd_byte *c; @@ -2762,7 +2771,9 @@ _bfd_mips_elf_section_processing (abfd, hdr) { const char *name = bfd_get_section_name (abfd, hdr->bfd_section); - if (strcmp (name, ".sdata") == 0) + if (strcmp (name, ".sdata") == 0 + || strcmp (name, ".lit8") == 0 + || strcmp (name, ".lit4") == 0) { hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; hdr->sh_type = SHT_PROGBITS; @@ -2772,10 +2783,9 @@ _bfd_mips_elf_section_processing (abfd, hdr) hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; hdr->sh_type = SHT_NOBITS; } - else if (strcmp (name, ".lit8") == 0 - || strcmp (name, ".lit4") == 0) + else if (strcmp (name, MIPS_ELF_SRDATA_SECTION_NAME (abfd)) == 0) { - hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; + hdr->sh_flags |= SHF_ALLOC | SHF_MIPS_GPREL; hdr->sh_type = SHT_PROGBITS; } else if (strcmp (name, ".compact_rel") == 0) @@ -2981,26 +2991,27 @@ mips_elf_additional_program_headers (abfd) bfd *abfd; { asection *s; - int ret; - - ret = 0; + int ret = 0; - if (! SGI_COMPAT (abfd)) - return ret; + if (!SGI_COMPAT (abfd)) + return 0; + /* See if we need a PT_MIPS_REGINFO segment. */ s = bfd_get_section_by_name (abfd, ".reginfo"); - if (s != NULL && (s->flags & SEC_LOAD) != 0) - { - /* We need a PT_MIPS_REGINFO segment. */ - ++ret; - } + if (s && (s->flags & SEC_LOAD)) + ++ret; - if (bfd_get_section_by_name (abfd, ".dynamic") != NULL - && bfd_get_section_by_name (abfd, ".mdebug") != NULL) - { - /* We need a PT_MIPS_RTPROC segment. */ - ++ret; - } + /* See if we need a PT_MIPS_OPTIONS segment. */ + if (IRIX_COMPAT (abfd) == ict_irix6 + && bfd_get_section_by_name (abfd, + MIPS_ELF_OPTIONS_SECTION_NAME (abfd))) + ++ret; + + /* See if we need a PT_MIPS_RTPROC segment. */ + if (IRIX_COMPAT (abfd) == ict_irix5 + && bfd_get_section_by_name (abfd, ".dynamic") + && bfd_get_section_by_name (abfd, ".mdebug")) + ++ret; return ret; } @@ -3047,114 +3058,154 @@ mips_elf_modify_segment_map (abfd) } } - /* If there are .dynamic and .mdebug sections, we make a room for - the RTPROC header. FIXME: Rewrite without section names. */ - if (bfd_get_section_by_name (abfd, ".interp") == NULL - && bfd_get_section_by_name (abfd, ".dynamic") != NULL - && bfd_get_section_by_name (abfd, ".mdebug") != NULL) + /* For IRIX 6, we don't have .mdebug sections, nor does anything but + .dynamic end up in PT_DYNAMIC. However, we do have to insert a + PT_OPTIONS segement immediately following the program header + table. */ + if (IRIX_COMPAT (abfd) == ict_irix6) { - for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) - if (m->p_type == PT_MIPS_RTPROC) + asection *s; + + for (s = abfd->sections; s; s = s->next) + if (elf_section_data (s)->this_hdr.sh_type == SHT_MIPS_OPTIONS) break; - if (m == NULL) + + if (s) { - m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); + struct elf_segment_map *options_segment; + + for (m = elf_tdata (abfd)->segment_map; m; m = m->next) + if (m->p_type == PT_PHDR) + break; + + /* There should always be a program header table. */ if (m == NULL) return false; - m->p_type = PT_MIPS_RTPROC; - - s = bfd_get_section_by_name (abfd, ".rtproc"); - if (s == NULL) - { - m->count = 0; - m->p_flags = 0; - m->p_flags_valid = 1; - } - else + options_segment = bfd_zalloc (abfd, + sizeof (struct elf_segment_map)); + options_segment->next = m->next; + options_segment->p_type = PT_MIPS_OPTIONS; + options_segment->p_flags = PF_R; + options_segment->p_flags_valid = true; + options_segment->count = 1; + options_segment->sections[0] = s; + m->next = options_segment; + } + } + else + { + /* If there are .dynamic and .mdebug sections, we make a room + for the RTPROC header. FIXME: Rewrite without section names. */ + if (bfd_get_section_by_name (abfd, ".interp") == NULL + && bfd_get_section_by_name (abfd, ".dynamic") != NULL + && bfd_get_section_by_name (abfd, ".mdebug") != NULL) + { + for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) + if (m->p_type == PT_MIPS_RTPROC) + break; + if (m == NULL) { - m->count = 1; - m->sections[0] = s; - } + m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); + if (m == NULL) + return false; - /* We want to put it after the DYNAMIC segment. */ - pm = &elf_tdata (abfd)->segment_map; - while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC) - pm = &(*pm)->next; - if (*pm != NULL) - pm = &(*pm)->next; + m->p_type = PT_MIPS_RTPROC; - m->next = *pm; - *pm = m; + s = bfd_get_section_by_name (abfd, ".rtproc"); + if (s == NULL) + { + m->count = 0; + m->p_flags = 0; + m->p_flags_valid = 1; + } + else + { + m->count = 1; + m->sections[0] = s; + } + + /* We want to put it after the DYNAMIC segment. */ + pm = &elf_tdata (abfd)->segment_map; + while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC) + pm = &(*pm)->next; + if (*pm != NULL) + pm = &(*pm)->next; + + m->next = *pm; + *pm = m; + } } - } - /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic, .dynstr, - .dynsym, and .hash sections, and everything in between. */ - for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) - if ((*pm)->p_type == PT_DYNAMIC) - break; - m = *pm; - if (m != NULL - && m->count == 1 - && strcmp (m->sections[0]->name, ".dynamic") == 0) - { - static const char *sec_names[] = - { ".dynamic", ".dynstr", ".dynsym", ".hash" }; - bfd_vma low, high; - unsigned int i, c; - struct elf_segment_map *n; - - low = 0xffffffff; - high = 0; - for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++) + /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic, + .dynstr, .dynsym, and .hash sections, and everything in + between. */ + for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) + if ((*pm)->p_type == PT_DYNAMIC) + break; + m = *pm; + if (m != NULL + && m->count == 1 + && strcmp (m->sections[0]->name, ".dynamic") == 0) { - s = bfd_get_section_by_name (abfd, sec_names[i]); - if (s != NULL && (s->flags & SEC_LOAD) != 0) + static const char *sec_names[] = + { ".dynamic", ".dynstr", ".dynsym", ".hash" }; + bfd_vma low, high; + unsigned int i, c; + struct elf_segment_map *n; + + low = 0xffffffff; + high = 0; + for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++) { - bfd_size_type sz; - - if (low > s->vma) - low = s->vma; - sz = s->_cooked_size; - if (sz == 0) - sz = s->_raw_size; - if (high < s->vma + sz) - high = s->vma + sz; + s = bfd_get_section_by_name (abfd, sec_names[i]); + if (s != NULL && (s->flags & SEC_LOAD) != 0) + { + bfd_size_type sz; + + if (low > s->vma) + low = s->vma; + sz = s->_cooked_size; + if (sz == 0) + sz = s->_raw_size; + if (high < s->vma + sz) + high = s->vma + sz; + } } - } - c = 0; - for (s = abfd->sections; s != NULL; s = s->next) - if ((s->flags & SEC_LOAD) != 0 - && s->vma >= low - && ((s->vma - + (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size)) - <= high)) - ++c; - - n = ((struct elf_segment_map *) - bfd_zalloc (abfd, sizeof *n + (c - 1) * sizeof (asection *))); - if (n == NULL) - return false; - *n = *m; - n->count = c; + c = 0; + for (s = abfd->sections; s != NULL; s = s->next) + if ((s->flags & SEC_LOAD) != 0 + && s->vma >= low + && ((s->vma + + (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size)) + <= high)) + ++c; + + n = ((struct elf_segment_map *) + bfd_zalloc (abfd, sizeof *n + (c - 1) * sizeof (asection *))); + if (n == NULL) + return false; + *n = *m; + n->count = c; - i = 0; - for (s = abfd->sections; s != NULL; s = s->next) - { - if ((s->flags & SEC_LOAD) != 0 - && s->vma >= low - && ((s->vma - + (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size)) - <= high)) + i = 0; + for (s = abfd->sections; s != NULL; s = s->next) { - n->sections[i] = s; - ++i; + if ((s->flags & SEC_LOAD) != 0 + && s->vma >= low + && ((s->vma + + (s->_cooked_size != 0 ? + s->_cooked_size : s->_raw_size)) + <= high)) + { + n->sections[i] = s; + ++i; + } } - } - *pm = n; + *pm = n; + } } return true; @@ -4121,22 +4172,36 @@ mips_elf_final_link (abfd, info) HDRR *symhdr = &debug.symbolic_header; PTR mdebug_handle = NULL; - /* Drop the .options section, since it has special semantics which I - haven't bothered to figure out. */ - for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next) + /* If all the things we linked together were PIC, but we're + producing an executable (rather than a shared object), then the + resulting file is CPIC (i.e., it calls PIC code.) */ + if (!info->shared && elf_elfheader (abfd)->e_flags & EF_MIPS_PIC) { - if (strcmp ((*secpp)->name, ".options") == 0) - { - for (p = (*secpp)->link_order_head; p != NULL; p = p->next) - if (p->type == bfd_indirect_link_order) - p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS; - (*secpp)->link_order_head = NULL; - *secpp = (*secpp)->next; - --abfd->section_count; - break; - } + elf_elfheader (abfd)->e_flags &= ~EF_MIPS_PIC; + elf_elfheader (abfd)->e_flags |= EF_MIPS_CPIC; + } + /* On IRIX5, we omit the .options section. On IRIX6, however, we + include it, even though we don't process it quite right. (Some + entries are supposed to be merged.) Empirically, we seem to be + better off including it then not. */ + if (IRIX_COMPAT (abfd) == ict_irix5) + for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next) + { + if (strcmp ((*secpp)->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0) + { + for (p = (*secpp)->link_order_head; p != NULL; p = p->next) + if (p->type == bfd_indirect_link_order) + p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS; + (*secpp)->link_order_head = NULL; + *secpp = (*secpp)->next; + --abfd->section_count; + + break; + } + } + /* Get a value for the GP register. */ if (elf_gp (abfd) == 0) { @@ -4152,17 +4217,14 @@ mips_elf_final_link (abfd, info) { bfd_vma lo; - /* Make up a value. */ + /* Find the GP-relative section with the lowest offset. */ lo = (bfd_vma) -1; for (o = abfd->sections; o != (asection *) NULL; o = o->next) - { - if (o->vma < lo - && (strcmp (o->name, ".sbss") == 0 - || strcmp (o->name, ".sdata") == 0 - || strcmp (o->name, ".lit4") == 0 - || strcmp (o->name, ".lit8") == 0)) - lo = o->vma; - } + if (o->vma < lo + && (elf_section_data (o)->this_hdr.sh_flags & SHF_MIPS_GPREL)) + lo = o->vma; + + /* And calculate GP relative to that. */ elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (abfd); } else @@ -5815,7 +5877,8 @@ mips_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec) /* The name of the dynamic interpreter. This is put in the .interp section. */ -#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" +#define ELF_DYNAMIC_INTERPRETER(abfd) \ + (ABI_N32_P (abfd) ? "/usr/lib32/libc.so.1" : "/usr/lib/libc.so.1") /* Create dynamic sections when linking against a dynamic object. */ @@ -5872,7 +5935,11 @@ mips_elf_create_dynamic_sections (abfd, info) return false; } - if (SGI_COMPAT (abfd)) + /* On IRIX5, we adjust add some additional symbols and change the + alignments of several sections. There is no ABI documentation + indicating that this is necessary on IRIX6, nor any evidence that + the linker takes such action. */ + if (IRIX_COMPAT (abfd) == ict_irix5) { for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++) { @@ -6679,7 +6746,8 @@ mips_elf_adjust_dynamic_symbol (info, h) if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) { /* We need .stub section. */ - s = bfd_get_section_by_name (dynobj, ".stub"); + s = bfd_get_section_by_name (dynobj, + MIPS_ELF_STUB_SECTION_NAME (dynobj)); BFD_ASSERT (s != NULL); h->root.u.def.section = s; @@ -6819,8 +6887,10 @@ mips_elf_size_dynamic_sections (output_bfd, info) { s = bfd_get_section_by_name (dynobj, ".interp"); BFD_ASSERT (s != NULL); - s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + s->_raw_size + = strlen (ELF_DYNAMIC_INTERPRETER (output_bfd)) + 1; + s->contents + = (unsigned char *) ELF_DYNAMIC_INTERPRETER (output_bfd); } } @@ -6929,7 +6999,7 @@ mips_elf_size_dynamic_sections (output_bfd, info) i = elf_hash_table (info)->dynsymcount - g->global_gotsym; s->_raw_size += i * 4; } - else if (strncmp (name, ".stub", 5) == 0) + else if (strcmp (name, MIPS_ELF_STUB_SECTION_NAME (output_bfd)) == 0) { /* Irix rld assumes that the function stub isn't at the end of .text section. So put a dummy. XXX */ @@ -6964,13 +7034,12 @@ mips_elf_size_dynamic_sections (output_bfd, info) } /* Allocate memory for the section contents. */ - s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); + s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); if (s->contents == NULL && s->_raw_size != 0) { bfd_set_error (bfd_error_no_memory); return false; } - memset (s->contents, 0, s->_raw_size); } if (elf_hash_table (info)->dynamic_sections_created) @@ -7203,7 +7272,8 @@ mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym) BFD_ASSERT (h->dynindx != -1); - s = bfd_get_section_by_name (dynobj, ".stub"); + s = bfd_get_section_by_name (dynobj, + MIPS_ELF_STUB_SECTION_NAME (dynobj)); BFD_ASSERT (s != NULL); /* Fill the stub. */ @@ -7333,8 +7403,10 @@ mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym) else if (mips_elf_hash_table (info)->use_rld_obj_head && strcmp (name, "__rld_obj_head") == 0) { - asection *s = bfd_get_section_by_name (dynobj, ".rld_map"); - BFD_ASSERT (s != NULL); + /* IRIX6 does not use a .rld_map section. */ + if (IRIX_COMPAT (output_bfd) == ict_irix5) + BFD_ASSERT (bfd_get_section_by_name (dynobj, ".rld_map") + != NULL); mips_elf_hash_table (info)->rld_value = sym->st_value; } } @@ -7673,7 +7745,8 @@ mips_elf_finish_dynamic_sections (output_bfd, info) s->contents)); /* Clean up a dummy stub function entry in .text. */ - s = bfd_get_section_by_name (dynobj, ".stub"); + s = bfd_get_section_by_name (dynobj, + MIPS_ELF_STUB_SECTION_NAME (dynobj)); if (s != NULL) { file_ptr dummy_offset; |