/* AVR-specific support for 32-bit ELF
- Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2006
+ Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2006, 2007
Free Software Foundation, Inc.
Contributed by Denis Chertykov <denisc@overta.ru>
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/avr.h"
/* Various hash macros and functions. */
#define avr_link_hash_table(p) \
- ((struct elf32_avr_link_hash_table *) ((p)->hash))
+ /* PR 3874: Check that we have an AVR style hash table before using it. */\
+ ((p)->hash->table.newfunc != elf32_avr_link_hash_newfunc ? NULL : \
+ ((struct elf32_avr_link_hash_table *) ((p)->hash)))
#define avr_stub_hash_entry(ent) \
((struct elf32_avr_stub_hash_entry *)(ent))
return entry;
}
+/* This function is just a straight passthrough to the real
+ function in linker.c. Its prupose is so that its address
+ can be compared inside the avr_link_hash_table macro. */
+
+static struct bfd_hash_entry *
+elf32_avr_link_hash_newfunc (struct bfd_hash_entry * entry,
+ struct bfd_hash_table * table,
+ const char * string)
+{
+ return _bfd_elf_link_hash_newfunc (entry, table, string);
+}
+
/* Create the derived linker hash table. The AVR ELF port uses the derived
hash table to keep information specific to the AVR ELF linker (without
using static variables). */
return NULL;
if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
- _bfd_elf_link_hash_newfunc,
+ elf32_avr_link_hash_newfunc,
sizeof (struct elf_link_hash_entry)))
{
free (htab);
return NULL;
}
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0;
+ i < sizeof (elf_avr_howto_table) / sizeof (elf_avr_howto_table[0]);
+ i++)
+ if (elf_avr_howto_table[i].name != NULL
+ && strcasecmp (elf_avr_howto_table[i].name, r_name) == 0)
+ return &elf_avr_howto_table[i];
+
+ return NULL;
+}
+
/* Set the howto pointer for an AVR ELF reloc. */
static void
cache_ptr->howto = &elf_avr_howto_table[r_type];
}
-static asection *
-elf32_avr_gc_mark_hook (asection *sec,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
-{
- if (h != NULL)
- {
- switch (ELF32_R_TYPE (rel->r_info))
- {
- default:
- switch (h->root.type)
- {
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- return h->root.u.def.section;
-
- case bfd_link_hash_common:
- return h->root.u.c.p->section;
-
- default:
- break;
- }
- }
- }
- else
- return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
-
- return NULL;
-}
-
-static bfd_boolean
-elf32_avr_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- asection *sec ATTRIBUTE_UNUSED,
- const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
-{
- /* We don't use got and plt entries for avr. */
- return TRUE;
-}
-
/* Look through the relocs for a section during the first phase.
Since we don't do .gots or .plts, we just need to consider the
virtual table relocs for gc. */
Elf_Internal_Rela * relend;
struct elf32_avr_link_hash_table * htab = avr_link_hash_table (info);
- if (info->relocatable)
- return TRUE;
-
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
const char * name;
int r_type;
- /* This is a final link. */
r_type = ELF32_R_TYPE (rel->r_info);
r_symndx = ELF32_R_SYM (rel->r_info);
howto = elf_avr_howto_table + ELF32_R_TYPE (rel->r_info);
name = h->root.root.string;
}
+ if (sec != NULL && elf_discarded_section (sec))
+ {
+ /* For relocs against symbols from removed linkonce sections,
+ or sections discarded by a linker script, we just want the
+ section contents zeroed. Avoid any special processing. */
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ rel->r_info = 0;
+ rel->r_addend = 0;
+ continue;
+ }
+
+ if (info->relocatable)
+ continue;
+
r = avr_final_link_relocate (howto, input_bfd, input_section,
contents, rel, relocation, htab);
struct elf32_avr_link_hash_table *htab;
htab = avr_link_hash_table (link_info);
+ if (htab == NULL)
+ return FALSE;
/* Assume nothing changes. */
*again = FALSE;
info = (struct bfd_link_info *) in_arg;
htab = avr_link_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
target = hsh->target_value;
bfd_vma pc_wrap_around,
bfd_boolean call_ret_replacement)
{
- struct elf32_avr_link_hash_table *htab = avr_link_hash_table(info);
+ struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info);
+ if (htab == NULL)
+ return;
htab->stub_sec = avr_stub_section;
htab->stub_bfd = avr_stub_bfd;
htab->no_stubs = no_stubs;
bfd_size_type amt;
struct elf32_avr_link_hash_table *htab = avr_link_hash_table(info);
- if (htab->no_stubs)
+ if (htab == NULL || htab->no_stubs)
return 0;
/* Count the number of input BFDs and find the top input section id. */
Elf_Internal_Sym *local_syms, **all_local_syms;
struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info);
+ if (htab == NULL)
+ return -1;
+
/* We want to read in symbol extension records only once. To do this
we need to read in the local symbols in parallel and save them for
later use; so hold pointers to the local symbols in an array. */
struct bfd_link_info *info,
bfd_boolean is_prealloc_run)
{
- struct elf32_avr_link_hash_table *htab;
- int stub_changed = 0;
+ struct elf32_avr_link_hash_table *htab;
+ int stub_changed = 0;
- htab = avr_link_hash_table (info);
+ htab = avr_link_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
- /* At this point we initialize htab->vector_base
- To the start of the text output section. */
- htab->vector_base = htab->stub_sec->output_section->vma;
+ /* At this point we initialize htab->vector_base
+ To the start of the text output section. */
+ htab->vector_base = htab->stub_sec->output_section->vma;
- if (get_local_syms (info->input_bfds, info))
- {
- if (htab->all_local_syms)
- goto error_ret_free_local;
- return FALSE;
- }
+ if (get_local_syms (info->input_bfds, info))
+ {
+ if (htab->all_local_syms)
+ goto error_ret_free_local;
+ return FALSE;
+ }
if (ADD_DUMMY_STUBS_FOR_DEBUGGING)
{
bfd_size_type total_size = 0;
htab = avr_link_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
/* In case that there were several stub sections: */
for (stub_sec = htab->stub_bfd->sections;
#define elf_info_to_howto avr_info_to_howto_rela
#define elf_info_to_howto_rel NULL
#define elf_backend_relocate_section elf32_avr_relocate_section
-#define elf_backend_gc_mark_hook elf32_avr_gc_mark_hook
-#define elf_backend_gc_sweep_hook elf32_avr_gc_sweep_hook
#define elf_backend_check_relocs elf32_avr_check_relocs
#define elf_backend_can_gc_sections 1
#define elf_backend_rela_normal 1
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