diff options
Diffstat (limited to 'bfd/elf64-s390.c')
| -rw-r--r-- | bfd/elf64-s390.c | 63 |
1 files changed, 45 insertions, 18 deletions
diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c index 1c10643..b8c0b6a 100644 --- a/bfd/elf64-s390.c +++ b/bfd/elf64-s390.c @@ -405,6 +405,12 @@ elf_s390_is_local_label_name (abfd, name) #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" +/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid + copying dynamic variables from a shared lib into an app's dynbss + section, and instead use a dynamic relocation to point into the + shared lib. */ +#define ELIMINATE_COPY_RELOCS 1 + /* The size in bytes of the first entry in the procedure linkage table. */ #define PLT_FIRST_ENTRY_SIZE 32 /* The size in bytes of an entry in the procedure linkage table. */ @@ -782,7 +788,18 @@ elf_s390_copy_indirect_symbol (bed, dir, ind) eind->tls_type = GOT_UNKNOWN; } - _bfd_elf_link_hash_copy_indirect (bed, dir, ind); + if (ELIMINATE_COPY_RELOCS + && ind->root.type != bfd_link_hash_indirect + && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) + /* If called to transfer flags for a weakdef during processing + of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. + We clear it ourselves for ELIMINATE_COPY_RELOCS. */ + dir->elf_link_hash_flags |= + (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC + | ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_REF_REGULAR_NONWEAK)); + else + _bfd_elf_link_hash_copy_indirect (bed, dir, ind); } static int @@ -1114,7 +1131,8 @@ elf_s390_check_relocs (abfd, info, sec, relocs) || h->root.type == bfd_link_hash_defweak || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)))) - || (!info->shared + || (ELIMINATE_COPY_RELOCS + && !info->shared && (sec->flags & SEC_ALLOC) != 0 && h != NULL && (h->root.type == bfd_link_hash_defweak @@ -1452,8 +1470,6 @@ elf_s390_adjust_dynamic_symbol (info, h) struct elf_link_hash_entry *h; { struct elf_s390_link_hash_table *htab; - struct elf_s390_link_hash_entry * eh; - struct elf_s390_dyn_relocs *p; asection *s; unsigned int power_of_two; @@ -1499,6 +1515,10 @@ elf_s390_adjust_dynamic_symbol (info, h) || h->weakdef->root.type == bfd_link_hash_defweak); h->root.u.def.section = h->weakdef->root.u.def.section; h->root.u.def.value = h->weakdef->root.u.def.value; + if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) + h->elf_link_hash_flags + = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) + | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); return TRUE; } @@ -1524,20 +1544,26 @@ elf_s390_adjust_dynamic_symbol (info, h) return TRUE; } - eh = (struct elf_s390_link_hash_entry *) h; - for (p = eh->dyn_relocs; p != NULL; p = p->next) + if (ELIMINATE_COPY_RELOCS) { - s = p->sec->output_section; - if (s != NULL && (s->flags & SEC_READONLY) != 0) - break; - } + struct elf_s390_link_hash_entry * eh; + struct elf_s390_dyn_relocs *p; - /* If we didn't find any dynamic relocs in read-only sections, then - we'll be keeping the dynamic relocs and avoiding the copy reloc. */ - if (p == NULL) - { - h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; - return TRUE; + eh = (struct elf_s390_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + s = p->sec->output_section; + if (s != NULL && (s->flags & SEC_READONLY) != 0) + break; + } + + /* If we didn't find any dynamic relocs in read-only sections, then + we'll be keeping the dynamic relocs and avoiding the copy reloc. */ + if (p == NULL) + { + h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; + return TRUE; + } } /* We must allocate the symbol in our .dynbss section, which will @@ -1777,7 +1803,7 @@ allocate_dynrelocs (h, inf) && h->root.type == bfd_link_hash_undefweak) eh->dyn_relocs = NULL; } - else + else if (ELIMINATE_COPY_RELOCS) { /* For the non-shared case, discard space for relocs against symbols which turn out to need copy relocs or are not @@ -2476,7 +2502,8 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, && (! info->symbolic || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)))) - || (!info->shared + || (ELIMINATE_COPY_RELOCS + && !info->shared && h != NULL && h->dynindx != -1 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |