From 3bf083ed23b1337341129b810ed5da29ba8207f9 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Tue, 5 Dec 2017 10:03:03 +1030 Subject: dyn_relocs tidy Many targets define their own dyn_relocs struct when they could use struct elf_dyn_relocs. This patch tidies that, and uses readonly_dynrelocs in a few more places. The SH adjust_dynamic_symbol had some really weird code dating back to 2002 that looked over dynamic relocations for any in SEC_HAS_CONTENTS or SEC_READONLY sections, rather than just the usual SEC_READONLY sections. So basically any dynamic relocation. What's more, the SH relocate_section has no support for emitting dynamic relocations in non-PIC. In other words, SH has no support for avoiding copy relocs in non-PIC. I've made that more obvious by using "if (0 && ..)" in asjust_dynamic_symbol. Unfortunately, LM32, M32R, NDS32, and OR1K copied the bogus SH adjust_dynamic_symbol code. So none of those targets would have avoided copy relocs. LM32, M32R, NDS32 get the "if (0)" treatment too. (LM32 is even more broken in that non_got_ref is never set.) OR1K relocate_section looks like it might support dynamic relocs in non-PIC, so I've enabled the copy reloc avoidance code for that target. * elf32-hppa.c (struct elf32_hppa_dyn_reloc_entry): Delete. Use struct elf_dyn_relocs throughout file instead. (elf32_hppa_adjust_dynamic_symbol): Comment tidy. * elf32-lm32.c (struct elf_lm32_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (lm32_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable. Disable -z no-copyreloc too. * elf32-m32r.c (struct elf_m32r_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (m32r_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable. Disable -z no-copyreloc too. * elf32-metag.c (struct elf_metag_dyn_reloc_entry): Delete. Use struct elf_dyn_relocs throughout file instead. (elf_metag_adjust_dynamic_symbol): Use readonly_dynrelocs. * elf32-microblaze.c (struct elf32_mb_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (readonly_dynrelocs): New function. (microblaze_elf_adjust_dynamic_symbol): Use it. * elf32-nds32.c (struct elf_nds32_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (nds32_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable. Disable -z no-copyreloc too. * elf32-nios2.c (struct elf32_nios2_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. * elf32-or1k.c (struct elf_or1k_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (or1k_elf_adjust_dynamic_symbol): Use readonly_dynrelocs. * elf32-sh.c (struct elf_sh_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (sh_elf_adjust_dynamic_symbol): Use readonly_dynrelocs, but disable. Disable -z no-copyreloc too. * elf32-tilepro.c (struct tilepro_elf_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (tilepro_elf_adjust_dynamic_symbol): Use readonly_dynrelocs. * elfnn-riscv.c (struct riscv_elf_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (riscv_elf_adjust_dynamic_symbol): Use readonly_dynrelocs. * elfxx-sparc.c (struct _bfd_sparc_elf_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (_bfd_sparc_elf_adjust_dynamic_symbol): Use readonly_dynrelocs. * elfxx-tilegx.c (struct tilegx_elf_dyn_relocs): Delete. Use struct elf_dyn_relocs throughout file instead. (tilegx_elf_adjust_dynamic_symbol): Use readonly_dynrelocs. * elf32-s390.c (elf_s390_adjust_dynamic_symbol): Use readonly_dynrelocs. * elf64-s390.c (elf_s390_adjust_dynamic_symbol): Use readonly_dynrelocs. --- bfd/elf32-or1k.c | 63 ++++++++++++++------------------------------------------ 1 file changed, 16 insertions(+), 47 deletions(-) (limited to 'bfd/elf32-or1k.c') diff --git a/bfd/elf32-or1k.c b/bfd/elf32-or1k.c index 03accf7..d1d27f1 100644 --- a/bfd/elf32-or1k.c +++ b/bfd/elf32-or1k.c @@ -556,26 +556,6 @@ static const struct or1k_reloc_map or1k_reloc_map[] = { BFD_RELOC_OR1K_TLS_LE_LO16, R_OR1K_TLS_LE_LO16 }, }; -/* The linker needs to keep track of the number of relocs that it - decides to copy as dynamic relocs in check_relocs for each symbol. - This is so that it can later discard them if they are found to be - unnecessary. We store the information in a field extending the - regular ELF linker hash table. */ - -struct elf_or1k_dyn_relocs -{ - struct elf_or1k_dyn_relocs *next; - - /* The input section of the reloc. */ - asection *sec; - - /* Total number of relocs copied for the input section. */ - bfd_size_type count; - - /* Number of pc-relative relocs copied for the input section. */ - bfd_size_type pc_count; -}; - #define TLS_UNKNOWN 0 #define TLS_NONE 1 #define TLS_GD 2 @@ -589,7 +569,7 @@ struct elf_or1k_link_hash_entry struct elf_link_hash_entry root; /* Track dynamic relocs copied for this symbol. */ - struct elf_or1k_dyn_relocs *dyn_relocs; + struct elf_dyn_relocs *dyn_relocs; /* Track type of TLS access. */ unsigned char tls_type; @@ -1515,8 +1495,8 @@ or1k_elf_check_relocs (bfd *abfd, && (h->root.type == bfd_link_hash_defweak || !h->def_regular))) { - struct elf_or1k_dyn_relocs *p; - struct elf_or1k_dyn_relocs **head; + struct elf_dyn_relocs *p; + struct elf_dyn_relocs **head; /* When creating a shared object, we must copy these relocs into the output file. We create a reloc @@ -1581,14 +1561,14 @@ or1k_elf_check_relocs (bfd *abfd, return FALSE; vpp = &elf_section_data (s)->local_dynrel; - head = (struct elf_or1k_dyn_relocs **) vpp; + head = (struct elf_dyn_relocs **) vpp; } p = *head; if (p == NULL || p->sec != sec) { bfd_size_type amt = sizeof *p; - p = ((struct elf_or1k_dyn_relocs *) + p = ((struct elf_dyn_relocs *) bfd_alloc (htab->root.dynobj, amt)); if (p == NULL) return FALSE; @@ -1926,7 +1906,7 @@ or1k_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, static asection * readonly_dynrelocs (struct elf_link_hash_entry *h) { - struct elf_or1k_dyn_relocs *p; + struct elf_dyn_relocs *p; struct elf_or1k_link_hash_entry *eh = (struct elf_or1k_link_hash_entry *) h; for (p = eh->dyn_relocs; p != NULL; p = p->next) @@ -1950,8 +1930,6 @@ or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info, struct elf_link_hash_entry *h) { struct elf_or1k_link_hash_table *htab; - struct elf_or1k_link_hash_entry *eh; - struct elf_or1k_dyn_relocs *p; bfd *dynobj; asection *s, *srel; @@ -2025,18 +2003,9 @@ or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info, return TRUE; } - eh = (struct elf_or1k_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 | SEC_HAS_CONTENTS)) != 0) - break; - } - - /* If we didn't find any dynamic relocs in sections which needs the - copy reloc, then we'll be keeping the dynamic relocs and avoiding - the copy reloc. */ - if (p == NULL) + /* If we don't find any dynamic relocs in read-only sections, then + we'll be keeping the dynamic relocs and avoiding the copy reloc. */ + if (!readonly_dynrelocs (h)) { h->non_got_ref = 0; return TRUE; @@ -2088,7 +2057,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) struct bfd_link_info *info; struct elf_or1k_link_hash_table *htab; struct elf_or1k_link_hash_entry *eh; - struct elf_or1k_dyn_relocs *p; + struct elf_dyn_relocs *p; if (h->root.type == bfd_link_hash_indirect) return TRUE; @@ -2208,7 +2177,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) { if (SYMBOL_CALLS_LOCAL (info, h)) { - struct elf_or1k_dyn_relocs **pp; + struct elf_dyn_relocs **pp; for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) { @@ -2356,9 +2325,9 @@ or1k_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, for (s = ibfd->sections; s != NULL; s = s->next) { - struct elf_or1k_dyn_relocs *p; + struct elf_dyn_relocs *p; - for (p = ((struct elf_or1k_dyn_relocs *) + for (p = ((struct elf_dyn_relocs *) elf_section_data (s)->local_dynrel); p != NULL; p = p->next) @@ -2549,14 +2518,14 @@ or1k_elf_copy_indirect_symbol (struct bfd_link_info *info, { if (edir->dyn_relocs != NULL) { - struct elf_or1k_dyn_relocs **pp; - struct elf_or1k_dyn_relocs *p; + struct elf_dyn_relocs **pp; + struct elf_dyn_relocs *p; /* Add reloc counts against the indirect sym to the direct sym list. Merge any entries against the same section. */ for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) { - struct elf_or1k_dyn_relocs *q; + struct elf_dyn_relocs *q; for (q = edir->dyn_relocs; q != NULL; q = q->next) if (q->sec == p->sec) -- cgit v1.1