diff options
Diffstat (limited to 'bfd/elfxx-ia64.c')
| -rw-r--r-- | bfd/elfxx-ia64.c | 306 |
1 files changed, 142 insertions, 164 deletions
diff --git a/bfd/elfxx-ia64.c b/bfd/elfxx-ia64.c index 943159b15b5..dca8b45cd34 100644 --- a/bfd/elfxx-ia64.c +++ b/bfd/elfxx-ia64.c @@ -2,21 +2,21 @@ Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. Contributed by David Mosberger-Tang <davidm@hpl.hp.com> -This file is part of BFD, the Binary File Descriptor library. + This file is part of BFD, the Binary File Descriptor library. -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "bfd.h" #include "sysdep.h" @@ -25,37 +25,33 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "opcode/ia64.h" #include "elf/ia64.h" -/* - * THE RULES for all the stuff the linker creates -- - * - * GOT Entries created in response to LTOFF or LTOFF_FPTR - * relocations. Dynamic relocs created for dynamic - * symbols in an application; REL relocs for locals - * in a shared library. - * - * FPTR The canonical function descriptor. Created for local - * symbols in applications. Descriptors for dynamic symbols - * and local symbols in shared libraries are created by - * ld.so. Thus there are no dynamic relocs against these - * objects. The FPTR relocs for such _are_ passed through - * to the dynamic relocation tables. - * - * FULL_PLT Created for a PCREL21B relocation against a dynamic symbol. - * Requires the creation of a PLTOFF entry. This does not - * require any dynamic relocations. - * - * PLTOFF Created by PLTOFF relocations. For local symbols, this - * is an alternate function descriptor, and in shared libraries - * requires two REL relocations. Note that this cannot be - * transformed into an FPTR relocation, since it must be in - * range of the GP. For dynamic symbols, this is a function - * descriptor for a MIN_PLT entry, and requires one IPLT reloc. - * - * MIN_PLT Created by PLTOFF entries against dynamic symbols. This - * does not reqire dynamic relocations. - */ - -#define USE_RELA /* we want RELA relocs, not REL */ +/* THE RULES for all the stuff the linker creates -- + + GOT Entries created in response to LTOFF or LTOFF_FPTR + relocations. Dynamic relocs created for dynamic + symbols in an application; REL relocs for locals + in a shared library. + + FPTR The canonical function descriptor. Created for local + symbols in applications. Descriptors for dynamic symbols + and local symbols in shared libraries are created by + ld.so. Thus there are no dynamic relocs against these + objects. The FPTR relocs for such _are_ passed through + to the dynamic relocation tables. + + FULL_PLT Created for a PCREL21B relocation against a dynamic symbol. + Requires the creation of a PLTOFF entry. This does not + require any dynamic relocations. + + PLTOFF Created by PLTOFF relocations. For local symbols, this + is an alternate function descriptor, and in shared libraries + requires two REL relocations. Note that this cannot be + transformed into an FPTR relocation, since it must be in + range of the GP. For dynamic symbols, this is a function + descriptor for a MIN_PLT entry, and requires one IPLT reloc. + + MIN_PLT Created by PLTOFF entries against dynamic symbols. This + does not reqire dynamic relocations. */ #define NELEMS(a) ((int) (sizeof (a) / sizeof ((a)[0]))) @@ -140,7 +136,7 @@ struct elfNN_ia64_link_hash_entry struct elfNN_ia64_link_hash_table { - /* The main hash table */ + /* The main hash table. */ struct elf_link_hash_table root; asection *got_sec; /* the linkage table section (or NULL) */ @@ -174,7 +170,7 @@ static boolean elfNN_ia64_relax_section static boolean is_unwind_section_name PARAMS ((bfd *abfd, const char *)); static boolean elfNN_ia64_section_from_shdr - PARAMS ((bfd *, ElfNN_Internal_Shdr *, char *)); + PARAMS ((bfd *, ElfNN_Internal_Shdr *, const char *)); static boolean elfNN_ia64_section_flags PARAMS ((flagword *, ElfNN_Internal_Shdr *)); static boolean elfNN_ia64_fake_sections @@ -211,7 +207,8 @@ static struct bfd_hash_entry *elfNN_ia64_new_elf_hash_entry PARAMS ((struct bfd_hash_entry *entry, struct bfd_hash_table *table, const char *string)); static void elfNN_ia64_hash_copy_indirect - PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *)); + PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, + struct elf_link_hash_entry *)); static void elfNN_ia64_hash_hide_symbol PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean)); static struct bfd_link_hash_table *elfNN_ia64_hash_table_create @@ -327,7 +324,7 @@ static void elfNN_hpux_post_process_headers boolean elfNN_hpux_backend_section_from_bfd_section PARAMS ((bfd *abfd, asection *sec, int *retval)); -/* ia64-specific relocation */ +/* ia64-specific relocation. */ /* Perform a relocation. Not much to do here as all the hard work is done in elfNN_ia64_final_link_relocate. */ @@ -461,7 +458,7 @@ static unsigned char elf_code_to_howto_index[R_IA64_MAX_RELOC_CODE + 1]; /* Given a BFD reloc type, return the matching HOWTO structure. */ -static reloc_howto_type* +static reloc_howto_type * lookup_howto (rtype) unsigned int rtype; { @@ -691,15 +688,10 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again) }; Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Shdr *shndx_hdr; Elf_Internal_Rela *internal_relocs; - Elf_Internal_Rela *free_relocs = NULL; Elf_Internal_Rela *irel, *irelend; bfd_byte *contents; - bfd_byte *free_contents = NULL; - ElfNN_External_Sym *extsyms; - ElfNN_External_Sym *free_extsyms = NULL; - Elf_External_Sym_Shndx *shndx_buf = NULL; + Elf_Internal_Sym *isymbuf = NULL; struct elfNN_ia64_link_hash_table *ia64_info; struct one_fixup *fixups = NULL; boolean changed_contents = false; @@ -726,10 +718,7 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again) (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, link_info->keep_memory)); if (internal_relocs == NULL) - goto error_return; - - if (! link_info->keep_memory) - free_relocs = internal_relocs; + return false; ia64_info = elfNN_ia64_hash_table (link_info); irelend = internal_relocs + sec->reloc_count; @@ -741,8 +730,8 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again) /* No branch-type relocations. */ if (irel == irelend) { - if (free_relocs != NULL) - free (free_relocs); + if (elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); return true; } @@ -754,48 +743,15 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again) contents = (bfd_byte *) bfd_malloc (sec->_raw_size); if (contents == NULL) goto error_return; - free_contents = contents; if (! bfd_get_section_contents (abfd, sec, contents, (file_ptr) 0, sec->_raw_size)) goto error_return; } - /* Read this BFD's local symbols. */ - if (symtab_hdr->contents != NULL) - extsyms = (ElfNN_External_Sym *) symtab_hdr->contents; - else - { - bfd_size_type amt; - - amt = symtab_hdr->sh_info * sizeof (ElfNN_External_Sym); - extsyms = (ElfNN_External_Sym *) bfd_malloc (amt); - if (extsyms == NULL) - goto error_return; - free_extsyms = extsyms; - if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 - || bfd_bread (extsyms, amt, abfd) != amt) - goto error_return; - } - - shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; - if (shndx_hdr->sh_size != 0) - { - bfd_size_type amt; - - amt = symtab_hdr->sh_info * sizeof (Elf_External_Sym_Shndx); - shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); - if (shndx_buf == NULL) - goto error_return; - if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 - || bfd_bread (shndx_buf, amt, abfd) != amt) - goto error_return; - } - for (; irel < irelend; irel++) { bfd_vma symaddr, reladdr, trampoff, toff, roff; - Elf_Internal_Sym isym; asection *tsec; struct one_fixup *f; bfd_size_type amt; @@ -806,25 +762,34 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again) /* Get the value of the symbol referred to by the reloc. */ if (ELFNN_R_SYM (irel->r_info) < symtab_hdr->sh_info) { - ElfNN_External_Sym *esym; - Elf_External_Sym_Shndx *shndx; - /* A local symbol. */ - esym = extsyms + ELFNN_R_SYM (irel->r_info); - shndx = shndx_buf + (shndx_buf ? ELFNN_R_SYM (irel->r_info) : 0); - bfd_elfNN_swap_symbol_in (abfd, esym, shndx, &isym); - if (isym.st_shndx == SHN_UNDEF) + Elf_Internal_Sym *isym; + + /* Read this BFD's local symbols. */ + if (isymbuf == NULL) + { + isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; + if (isymbuf == NULL) + isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, + symtab_hdr->sh_info, 0, + NULL, NULL, NULL); + if (isymbuf == 0) + goto error_return; + } + + isym = isymbuf + ELF64_R_SYM (irel->r_info); + if (isym->st_shndx == SHN_UNDEF) continue; /* We can't do anthing with undefined symbols. */ - else if (isym.st_shndx == SHN_ABS) + else if (isym->st_shndx == SHN_ABS) tsec = bfd_abs_section_ptr; - else if (isym.st_shndx == SHN_COMMON) + else if (isym->st_shndx == SHN_COMMON) tsec = bfd_com_section_ptr; - else if (isym.st_shndx == SHN_IA_64_ANSI_COMMON) + else if (isym->st_shndx == SHN_IA_64_ANSI_COMMON) tsec = bfd_com_section_ptr; else - tsec = bfd_section_from_elf_index (abfd, isym.st_shndx); + tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); - toff = isym.st_value; + toff = isym->st_value; } else { @@ -972,50 +937,50 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again) free (f); } - if (changed_relocs) - elf_section_data (sec)->relocs = internal_relocs; - else if (free_relocs != NULL) - free (free_relocs); - - if (changed_contents) - elf_section_data (sec)->this_hdr.contents = contents; - else if (free_contents != NULL) + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) { if (! link_info->keep_memory) - free (free_contents); + free (isymbuf); else { - /* Cache the section contents for elf_link_input_bfd. */ - elf_section_data (sec)->this_hdr.contents = contents; + /* Cache the symbols for elf_link_input_bfd. */ + symtab_hdr->contents = (unsigned char *) isymbuf; } } - if (shndx_buf != NULL) - free (shndx_buf); - - if (free_extsyms != NULL) + if (contents != NULL + && elf_section_data (sec)->this_hdr.contents != contents) { - if (! link_info->keep_memory) - free (free_extsyms); + if (!changed_contents && !link_info->keep_memory) + free (contents); else { - /* Cache the symbols for elf_link_input_bfd. */ - symtab_hdr->contents = (unsigned char *) extsyms; + /* Cache the section contents for elf_link_input_bfd. */ + elf_section_data (sec)->this_hdr.contents = contents; } } + if (elf_section_data (sec)->relocs != internal_relocs) + { + if (!changed_relocs) + free (internal_relocs); + else + elf_section_data (sec)->relocs = internal_relocs; + } + *again = changed_contents || changed_relocs; return true; error_return: - if (free_relocs != NULL) - free (free_relocs); - if (free_contents != NULL) - free (free_contents); - if (shndx_buf != NULL) - free (shndx_buf); - if (free_extsyms != NULL) - free (free_extsyms); + if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) + free (isymbuf); + if (contents != NULL + && elf_section_data (sec)->this_hdr.contents != contents) + free (contents); + if (internal_relocs != NULL + && elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); return false; } @@ -1047,7 +1012,7 @@ static boolean elfNN_ia64_section_from_shdr (abfd, hdr, name) bfd *abfd; ElfNN_Internal_Shdr *hdr; - char *name; + const char *name; { asection *newsect; @@ -1119,24 +1084,22 @@ elfNN_ia64_fake_sections (abfd, hdr, sec) else if (strcmp (name, ".HP.opt_annot") == 0) hdr->sh_type = SHT_IA_64_HP_OPT_ANOT; else if (strcmp (name, ".reloc") == 0) - /* - * This is an ugly, but unfortunately necessary hack that is - * needed when producing EFI binaries on IA-64. It tells - * elf.c:elf_fake_sections() not to consider ".reloc" as a section - * containing ELF relocation info. We need this hack in order to - * be able to generate ELF binaries that can be translated into - * EFI applications (which are essentially COFF objects). Those - * files contain a COFF ".reloc" section inside an ELFNN object, - * which would normally cause BFD to segfault because it would - * attempt to interpret this section as containing relocation - * entries for section "oc". With this hack enabled, ".reloc" - * will be treated as a normal data section, which will avoid the - * segfault. However, you won't be able to create an ELFNN binary - * with a section named "oc" that needs relocations, but that's - * the kind of ugly side-effects you get when detecting section - * types based on their names... In practice, this limitation is - * unlikely to bite. - */ + /* This is an ugly, but unfortunately necessary hack that is + needed when producing EFI binaries on IA-64. It tells + elf.c:elf_fake_sections() not to consider ".reloc" as a section + containing ELF relocation info. We need this hack in order to + be able to generate ELF binaries that can be translated into + EFI applications (which are essentially COFF objects). Those + files contain a COFF ".reloc" section inside an ELFNN object, + which would normally cause BFD to segfault because it would + attempt to interpret this section as containing relocation + entries for section "oc". With this hack enabled, ".reloc" + will be treated as a normal data section, which will avoid the + segfault. However, you won't be able to create an ELFNN binary + with a section named "oc" that needs relocations, but that's + the kind of ugly side-effects you get when detecting section + types based on their names... In practice, this limitation is + unlikely to bite. */ hdr->sh_type = SHT_PROGBITS; if (sec->flags & SEC_SMALL_DATA) @@ -1225,6 +1188,19 @@ elfNN_ia64_final_write_processing (abfd, linker) break; } } + + if (! elf_flags_init (abfd)) + { + unsigned long flags = 0; + + if (abfd->xvec->byteorder == BFD_ENDIAN_BIG) + flags |= EF_IA_64_BE; + if (bfd_get_mach (abfd) == bfd_mach_ia64_elf64) + flags |= EF_IA_64_ABI64; + + elf_elfheader(abfd)->e_flags = flags; + elf_flags_init (abfd) = true; + } } /* Hook called by the linker routine which adds symbols from an object @@ -1401,8 +1377,6 @@ elfNN_ia64_modify_segment_map (abfd) struct elf_segment_map *m, **pm; Elf_Internal_Shdr *hdr; asection *s; - boolean unwind_found; - asection *unwind_sec; /* If we need a PT_IA_64_ARCHEXT segment, it must come before all PT_LOAD segments. */ @@ -1447,20 +1421,16 @@ elfNN_ia64_modify_segment_map (abfd) for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) if (m->p_type == PT_IA_64_UNWIND) { + int i; + /* Look through all sections in the unwind segment for a match since there may be multiple sections to a segment. */ + for (i = m->count - 1; i >= 0; --i) + if (m->sections[i] == s) + break; - unwind_sec = m->sections[0]; - unwind_found = false; - while (unwind_sec != NULL && !unwind_found) - { - if (unwind_sec == s) - unwind_found = true; - else - unwind_sec = unwind_sec -> next; - } - if (unwind_found) + if (i >= 0) break; } @@ -1548,6 +1518,8 @@ elfNN_ia64_dynamic_symbol_p (h, info) case STV_INTERNAL: case STV_HIDDEN: return false; + default: + break; } if (h->root.type == bfd_link_hash_undefweak @@ -1631,7 +1603,8 @@ elfNN_ia64_new_elf_hash_entry (entry, table, string) } static void -elfNN_ia64_hash_copy_indirect (xdir, xind) +elfNN_ia64_hash_copy_indirect (bed, xdir, xind) + struct elf_backend_data *bed ATTRIBUTE_UNUSED; struct elf_link_hash_entry *xdir, *xind; { struct elfNN_ia64_link_hash_entry *dir, *ind; @@ -4834,6 +4807,9 @@ elfNN_hpux_backend_section_from_bfd_section (abfd, sec, retval) #undef elf_backend_section_from_bfd_section #define elf_backend_section_from_bfd_section elfNN_hpux_backend_section_from_bfd_section +#undef elf_backend_want_p_paddr_set_to_zero +#define elf_backend_want_p_paddr_set_to_zero 1 + #undef ELF_MAXPAGESIZE #define ELF_MAXPAGESIZE 0x1000 /* 1K */ @@ -4841,3 +4817,5 @@ elfNN_hpux_backend_section_from_bfd_section (abfd, sec, retval) #define elfNN_bed elfNN_ia64_hpux_bed #include "elfNN-target.h" + +#undef elf_backend_want_p_paddr_set_to_zero |