diff options
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/elf-bfd.h | 23 | ||||
| -rw-r--r-- | bfd/elf64-x86-64.c | 27 | ||||
| -rw-r--r-- | bfd/elflink.c | 146 | ||||
| -rw-r--r-- | bfd/elfxx-target.h | 5 |
4 files changed, 139 insertions, 62 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index a611349..3ed22fa 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -957,6 +957,19 @@ typedef struct elf_property_list struct elf_property property; } elf_property_list; +/* This structure is used to pass information to + elf_backend_add_glibc_version_dependency. */ + +struct elf_find_verdep_info +{ + /* General link information. */ + struct bfd_link_info *info; + /* The number of dependencies. */ + unsigned int vers; + /* Whether we had a failure. */ + bool failed; +}; + struct bfd_elf_section_reloc_data; struct elf_backend_data @@ -1488,6 +1501,10 @@ struct elf_backend_data bool (*elf_backend_write_section) (bfd *, struct bfd_link_info *, asection *, bfd_byte *); + /* This function adds glibc version dependency. */ + void (*elf_backend_add_glibc_version_dependency) + (struct elf_find_verdep_info *); + /* This function, if defined, returns TRUE if it is section symbols only that are considered local for the purpose of partitioning the symbol table into local and global symbols. This should be NULL @@ -2583,6 +2600,12 @@ extern bool _bfd_elf_link_output_relocs (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, struct elf_link_hash_entry **); +extern void _bfd_elf_link_add_glibc_version_dependency + (struct elf_find_verdep_info *, const char *[]); + +extern void _bfd_elf_link_add_dt_relr_dependency + (struct elf_find_verdep_info *); + extern bool _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *, struct elf_link_hash_entry *, asection *); diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c index f8905fb..f125375 100644 --- a/bfd/elf64-x86-64.c +++ b/bfd/elf64-x86-64.c @@ -5572,6 +5572,31 @@ elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); } +static void +elf_x86_64_add_glibc_version_dependency + (struct elf_find_verdep_info *rinfo) +{ + unsigned int i = 0; + const char *version[3] = { NULL, NULL, NULL }; + struct elf_x86_link_hash_table *htab; + + if (rinfo->info->enable_dt_relr) + { + version[i] = "GLIBC_ABI_DT_RELR"; + i++; + } + + htab = elf_x86_hash_table (rinfo->info, X86_64_ELF_DATA); + if (htab != NULL && htab->params->mark_plt) + { + version[i] = "GLIBC_2.36"; + i++; + } + + if (i != 0) + _bfd_elf_link_add_glibc_version_dependency (rinfo, version); +} + static const struct bfd_elf_special_section elf_x86_64_special_sections[]= { @@ -5656,6 +5681,8 @@ elf_x86_64_special_sections[]= elf_x86_64_link_setup_gnu_properties #define elf_backend_hide_symbol \ _bfd_x86_elf_hide_symbol +#define elf_backend_add_glibc_version_dependency \ + elf_x86_64_add_glibc_version_dependency #undef elf64_bed #define elf64_bed elf64_x86_64_bed diff --git a/bfd/elflink.c b/bfd/elflink.c index a577c95..c2494b3 100644 --- a/bfd/elflink.c +++ b/bfd/elflink.c @@ -46,19 +46,6 @@ struct elf_info_failed bool failed; }; -/* This structure is used to pass information to - _bfd_elf_link_find_version_dependencies. */ - -struct elf_find_verdep_info -{ - /* General link information. */ - struct bfd_link_info *info; - /* The number of dependencies. */ - unsigned int vers; - /* Whether we had a failure. */ - bool failed; -}; - static bool _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *, struct elf_info_failed *); @@ -2217,64 +2204,64 @@ _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) return true; } -/* Return true if GLIBC_ABI_DT_RELR is added to the list of version - dependencies successfully. GLIBC_ABI_DT_RELR will be put into the - .gnu.version_r section. */ +/* Return the glibc version reference if VERSION_DEP is added to the + list of glibc version dependencies successfully. VERSION_DEP will + be put into the .gnu.version_r section. */ -static bool -elf_link_add_dt_relr_dependency (struct elf_find_verdep_info *rinfo) +static Elf_Internal_Verneed * +elf_link_add_glibc_verneed (struct elf_find_verdep_info *rinfo, + Elf_Internal_Verneed *glibc_verref, + const char *version_dep) { - bfd *glibc_bfd = NULL; Elf_Internal_Verneed *t; Elf_Internal_Vernaux *a; size_t amt; - const char *relr = "GLIBC_ABI_DT_RELR"; - /* See if we already know about GLIBC_PRIVATE_DT_RELR. */ - for (t = elf_tdata (rinfo->info->output_bfd)->verref; - t != NULL; - t = t->vn_nextref) + if (glibc_verref != NULL) { - const char *soname = bfd_elf_get_dt_soname (t->vn_bfd); - /* Skip the shared library if it isn't libc.so. */ - if (!soname || !startswith (soname, "libc.so.")) - continue; + t = glibc_verref; for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) { - /* Return if GLIBC_PRIVATE_DT_RELR dependency has been - added. */ - if (a->vna_nodename == relr - || strcmp (a->vna_nodename, relr) == 0) - return true; - - /* Check if libc.so provides GLIBC_2.XX version. */ - if (!glibc_bfd && startswith (a->vna_nodename, "GLIBC_2.")) - glibc_bfd = t->vn_bfd; + /* Return if VERSION_DEP dependency has been added. */ + if (a->vna_nodename == version_dep + || strcmp (a->vna_nodename, version_dep) == 0) + return t; } - - break; } + else + { + bool is_glibc; - /* Skip if it isn't linked against glibc. */ - if (glibc_bfd == NULL) - return true; + for (t = elf_tdata (rinfo->info->output_bfd)->verref; + t != NULL; + t = t->vn_nextref) + { + const char *soname = bfd_elf_get_dt_soname (t->vn_bfd); + if (soname != NULL && startswith (soname, "libc.so.")) + break; + } - /* This is a new version. Add it to tree we are building. */ - if (t == NULL) - { - amt = sizeof *t; - t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, - amt); + /* Skip the shared library if it isn't libc.so. */ if (t == NULL) + return t; + + is_glibc = false; + for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) { - rinfo->failed = true; - return false; + /* Return if VERSION_DEP dependency has been added. */ + if (a->vna_nodename == version_dep + || strcmp (a->vna_nodename, version_dep) == 0) + return t; + + /* Check if libc.so provides GLIBC_2.XX version. */ + if (!is_glibc && startswith (a->vna_nodename, "GLIBC_2.")) + is_glibc = true; } - t->vn_bfd = glibc_bfd; - t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; - elf_tdata (rinfo->info->output_bfd)->verref = t; + /* Skip if it isn't linked against glibc. */ + if (!is_glibc) + return NULL; } amt = sizeof *a; @@ -2282,10 +2269,10 @@ elf_link_add_dt_relr_dependency (struct elf_find_verdep_info *rinfo) if (a == NULL) { rinfo->failed = true; - return false; + return NULL; } - a->vna_nodename = relr; + a->vna_nodename = version_dep; a->vna_flags = 0; a->vna_nextptr = t->vn_auxptr; a->vna_other = rinfo->vers + 1; @@ -2293,7 +2280,45 @@ elf_link_add_dt_relr_dependency (struct elf_find_verdep_info *rinfo) t->vn_auxptr = a; - return true; + return t; +} + +/* Add VERSION_DEP to the list of version dependencies when linked + against glibc. */ + +void +_bfd_elf_link_add_glibc_version_dependency + (struct elf_find_verdep_info *rinfo, + const char *version_dep[]) +{ + Elf_Internal_Verneed *t = NULL; + + do + { + t = elf_link_add_glibc_verneed (rinfo, t, *version_dep); + /* Return if there is no glibc version reference. */ + if (t == NULL) + return; + version_dep++; + } + while (*version_dep != NULL); +} + +/* Add GLIBC_ABI_DT_RELR to the list of version dependencies when + linked against glibc. */ + +void +_bfd_elf_link_add_dt_relr_dependency (struct elf_find_verdep_info *rinfo) +{ + if (rinfo->info->enable_dt_relr) + { + const char *version[] = + { + "GLIBC_ABI_DT_RELR", + NULL + }; + _bfd_elf_link_add_glibc_version_dependency (rinfo, version); + } } /* Look through the symbols which are defined in other shared @@ -7047,12 +7072,9 @@ bfd_elf_size_dynamic_sections (bfd *output_bfd, if (sinfo.failed) return false; - if (info->enable_dt_relr) - { - elf_link_add_dt_relr_dependency (&sinfo); - if (sinfo.failed) - return false; - } + bed->elf_backend_add_glibc_version_dependency (&sinfo); + if (sinfo.failed) + return false; if (elf_tdata (output_bfd)->verref == NULL) s->flags |= SEC_EXCLUDE; diff --git a/bfd/elfxx-target.h b/bfd/elfxx-target.h index d4b14a0..a7f2fc6 100644 --- a/bfd/elfxx-target.h +++ b/bfd/elfxx-target.h @@ -667,6 +667,10 @@ #ifndef elf_backend_write_section #define elf_backend_write_section NULL #endif +#ifndef elf_backend_add_glibc_version_dependency +#define elf_backend_add_glibc_version_dependency \ + _bfd_elf_link_add_dt_relr_dependency +#endif #ifndef elf_backend_elfsym_local_is_section #define elf_backend_elfsym_local_is_section NULL #endif @@ -897,6 +901,7 @@ static const struct elf_backend_data elfNN_bed = elf_backend_can_make_multiple_eh_frame, elf_backend_encode_eh_address, elf_backend_write_section, + elf_backend_add_glibc_version_dependency, elf_backend_elfsym_local_is_section, elf_backend_mips_irix_compat, elf_backend_mips_rtype_to_howto, |