/* FR30-specific support for 32-bit ELF.
- Copyright (C) 1998 Free Software Foundation, Inc.
+ Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
/* Forward declarations. */
static bfd_reloc_status_type fr30_elf_i20_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type fr30_elf_i32_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static reloc_howto_type * fr30_reloc_type_lookup
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-static void fr30_info_to_howto_rela
+static void fr30_info_to_howto_rela
PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
-static boolean fr30_elf_relocate_section
- PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+static boolean fr30_elf_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+static bfd_reloc_status_type fr30_final_link_relocate
+ PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, bfd_vma));
+static boolean fr30_elf_gc_sweep_hook
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
+static asection * fr30_elf_gc_mark_hook
+ PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *, Elf_Internal_Sym *));
+static boolean fr30_elf_check_relocs
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
static reloc_howto_type fr30_elf_howto_table [] =
{
bfd_elf_generic_reloc, /* special_function */
"R_FR30_8", /* name */
true, /* partial_inplace */
- 0x0ff0, /* src_mask */
+ 0x0000, /* src_mask */
0x0ff0, /* dst_mask */
false), /* pcrel_offset */
fr30_elf_i20_reloc, /* special_function */
"R_FR30_20", /* name */
true, /* partial_inplace */
- 0x00f0ffff, /* src_mask */
+ 0x00000000, /* src_mask */
0x00f0ffff, /* dst_mask */
false), /* pcrel_offset */
bfd_elf_generic_reloc, /* special_function */
"R_FR30_32", /* name */
true, /* partial_inplace */
- 0xffffffff, /* src_mask */
+ 0x00000000, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A 32 bit into 48 bits absolute relocation. */
+ HOWTO (R_FR30_48, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ fr30_elf_i32_reloc, /* special_function */
+ "R_FR30_48", /* name */
+ true, /* partial_inplace */
+ 0x00000000, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
bfd_elf_generic_reloc, /* special_function */
"R_FR30_6_IN_4", /* name */
true, /* partial_inplace */
- 0x00f0, /* src_mask */
+ 0x0000, /* src_mask */
0x00f0, /* dst_mask */
false), /* pcrel_offset */
-
+
/* An 8 bit absolute relocation. */
HOWTO (R_FR30_8_IN_8, /* type */
0, /* rightshift */
bfd_elf_generic_reloc,/* special_function */
"R_FR30_8_IN_8", /* name */
true, /* partial_inplace */
- 0x0ff0, /* src_mask */
+ 0x0000, /* src_mask */
0x0ff0, /* dst_mask */
false), /* pcrel_offset */
-
+
/* A 9 bit absolute relocation. */
HOWTO (R_FR30_9_IN_8, /* type */
1, /* rightshift */
bfd_elf_generic_reloc,/* special_function */
"R_FR30_9_IN_8", /* name */
true, /* partial_inplace */
- 0x0ff0, /* src_mask */
+ 0x0000, /* src_mask */
0x0ff0, /* dst_mask */
false), /* pcrel_offset */
-
+
/* A 10 bit absolute relocation. */
HOWTO (R_FR30_10_IN_8, /* type */
2, /* rightshift */
bfd_elf_generic_reloc,/* special_function */
"R_FR30_10_IN_8", /* name */
true, /* partial_inplace */
- 0x0ff0, /* src_mask */
+ 0x0000, /* src_mask */
0x0ff0, /* dst_mask */
false), /* pcrel_offset */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"R_FR30_9_PCREL", /* name */
false, /* partial_inplace */
- 0x00ff, /* src_mask */
+ 0x0000, /* src_mask */
0x00ff, /* dst_mask */
- true), /* pcrel_offset */
+ false), /* pcrel_offset */
/* A PC relative 12 bit relocation, right shifted by 1. */
HOWTO (R_FR30_12_PCREL, /* type */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"R_FR30_12_PCREL", /* name */
false, /* partial_inplace */
- 0x07ff, /* src_mask */
+ 0x0000, /* src_mask */
0x07ff, /* dst_mask */
- true), /* pcrel_offset */
+ false), /* pcrel_offset */
+ /* GNU extension to record C++ vtable hierarchy */
+ HOWTO (R_FR30_GNU_VTINHERIT, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ NULL, /* special_function */
+ "R_FR30_GNU_VTINHERIT", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* GNU extension to record C++ vtable member usage */
+ HOWTO (R_FR30_GNU_VTENTRY, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ _bfd_elf_rel_vtable_reloc_fn, /* special_function */
+ "R_FR30_GNU_VTENTRY", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
};
\f
/* Utility to actually perform an R_FR30_20 reloc. */
PTR data;
asection * input_section;
bfd * output_bfd;
- char ** error_message;
+ char ** error_message ATTRIBUTE_UNUSED;
{
bfd_vma relocation;
unsigned long x;
-
+
/* This part is from bfd_elf_generic_reloc. */
if (output_bfd != (bfd *) NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
if (output_bfd != NULL)
/* FIXME: See bfd_perform_relocation. Is this right? */
- return bfd_reloc_continue;
+ return bfd_reloc_ok;
relocation =
symbol->value
+ symbol->section->output_offset
+ reloc_entry->addend;
- if (relocation > ((1U << 20) - 1))
+ if (relocation > (((bfd_vma) 1 << 20) - 1))
return bfd_reloc_overflow;
- x = bfd_get_32 (abfd, data + reloc_entry->address);
+ x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
- bfd_put_32 (abfd, x, data + reloc_entry->address);
+ bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address);
return bfd_reloc_ok;
}
+\f
+/* Utility to actually perform a R_FR30_48 reloc. */
+
+static bfd_reloc_status_type
+fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd * abfd;
+ arelent * reloc_entry;
+ asymbol * symbol;
+ PTR data;
+ asection * input_section;
+ bfd * output_bfd;
+ char ** error_message ATTRIBUTE_UNUSED;
+{
+ bfd_vma relocation;
+ /* This part is from bfd_elf_generic_reloc. */
+ if (output_bfd != (bfd *) NULL
+ && (symbol->flags & BSF_SECTION_SYM) == 0
+ && (! reloc_entry->howto->partial_inplace
+ || reloc_entry->addend == 0))
+ {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
+ if (output_bfd != NULL)
+ /* FIXME: See bfd_perform_relocation. Is this right? */
+ return bfd_reloc_ok;
+
+ relocation =
+ symbol->value
+ + symbol->section->output_section->vma
+ + symbol->section->output_offset
+ + reloc_entry->addend;
+
+ bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2);
+
+ return bfd_reloc_ok;
+}
\f
/* Map BFD reloc types to FR30 ELF reloc types. */
struct fr30_reloc_map
{
- unsigned int bfd_reloc_val;
+ bfd_reloc_code_real_type bfd_reloc_val;
unsigned int fr30_reloc_val;
};
{ BFD_RELOC_8, R_FR30_8 },
{ BFD_RELOC_FR30_20, R_FR30_20 },
{ BFD_RELOC_32, R_FR30_32 },
+ { BFD_RELOC_FR30_48, R_FR30_48 },
{ BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 },
{ BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 },
{ BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 },
{ BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 },
{ BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL },
{ BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL },
+ { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT },
+ { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY },
};
static reloc_howto_type *
fr30_reloc_type_lookup (abfd, code)
- bfd * abfd;
+ bfd * abfd ATTRIBUTE_UNUSED;
bfd_reloc_code_real_type code;
{
unsigned int i;
--i;)
if (fr30_reloc_map [i].bfd_reloc_val == code)
return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val];
-
+
return NULL;
}
static void
fr30_info_to_howto_rela (abfd, cache_ptr, dst)
- bfd * abfd;
+ bfd * abfd ATTRIBUTE_UNUSED;
arelent * cache_ptr;
Elf32_Internal_Rela * dst;
{
cache_ptr->howto = & fr30_elf_howto_table [r_type];
}
\f
+/* Perform a single relocation. By default we use the standard BFD
+ routines, but a few relocs, we have to do them ourselves. */
+
+static bfd_reloc_status_type
+fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
+ reloc_howto_type * howto;
+ bfd * input_bfd;
+ asection * input_section;
+ bfd_byte * contents;
+ Elf_Internal_Rela * rel;
+ bfd_vma relocation;
+{
+ bfd_reloc_status_type r = bfd_reloc_ok;
+ bfd_vma x;
+ bfd_signed_vma srel;
+
+ switch (howto->type)
+ {
+ case R_FR30_20:
+ contents += rel->r_offset;
+ relocation += rel->r_addend;
+
+ if (relocation > ((1 << 20) - 1))
+ return bfd_reloc_overflow;
+
+ x = bfd_get_32 (input_bfd, contents);
+ x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4);
+ bfd_put_32 (input_bfd, x, contents);
+ break;
+
+ case R_FR30_48:
+ contents += rel->r_offset + 2;
+ relocation += rel->r_addend;
+ bfd_put_32 (input_bfd, relocation, contents);
+ break;
+
+ case R_FR30_9_PCREL:
+ contents += rel->r_offset + 1;
+ srel = (bfd_signed_vma) relocation;
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= 2; /* Branch instructions add 2 to the PC... */
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+
+ if (srel & 1)
+ return bfd_reloc_outofrange;
+ if (srel > ((1 << 8) - 1) || (srel < - (1 << 8)))
+ return bfd_reloc_overflow;
+
+ bfd_put_8 (input_bfd, srel >> 1, contents);
+ break;
+
+ case R_FR30_12_PCREL:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= 2; /* Branch instructions add 2 to the PC... */
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+
+ if (srel & 1)
+ return bfd_reloc_outofrange;
+ if (srel > ((1 << 11) - 1) || (srel < - (1 << 11)))
+ return bfd_reloc_overflow;
+
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xf800) | ((srel >> 1) & 0x7ff);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ default:
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset,
+ relocation, rel->r_addend);
+ }
+
+ return r;
+}
+\f
/* Relocate an FR30 ELF section.
There is some attempt to make this function usable for many architectures,
both USE_REL and USE_RELA ['twould be nice if such a critter existed],
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
-
+
for (rel = relocs; rel < relend; rel ++)
{
reloc_howto_type * howto;
struct elf_link_hash_entry * h;
bfd_vma relocation;
bfd_reloc_status_type r;
- const char * name;
+ const char * name = NULL;
+ int r_type;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+
+ if ( r_type == R_FR30_GNU_VTINHERIT
+ || r_type == R_FR30_GNU_VTENTRY)
+ continue;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
-
+
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
{
sec = local_sections [r_symndx];
h = NULL;
sym = NULL;
sec = NULL;
-
+
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
sec = local_sections [r_symndx];
- relocation = (sec->output_section->vma
- + sec->output_offset
- + sym->st_value);
-
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
+
name = bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name);
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
else
{
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
-
+
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
name = h->root.root.string;
-
+
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
- input_section, rel->r_offset)))
+ input_section, rel->r_offset, true)))
return false;
#if 0
fprintf (stderr, "unknown: name: %s\n", name);
}
}
- r = _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset,
- relocation, rel->r_addend);
+ r = fr30_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel, relocation);
if (r != bfd_reloc_ok)
{
- const char * msg = (const char *)0;
+ const char * msg = (const char *) NULL;
switch (r)
{
case bfd_reloc_overflow:
- if (! ((*info->callbacks->reloc_overflow)
- (info, name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset)))
- return false;
+ r = info->callbacks->reloc_overflow
+ (info, name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset);
break;
case bfd_reloc_undefined:
- if (! ((*info->callbacks->undefined_symbol)
- (info, name, input_bfd, input_section,
- rel->r_offset)))
- return false;
+ r = info->callbacks->undefined_symbol
+ (info, name, input_bfd, input_section, rel->r_offset,
+ true);
break;
case bfd_reloc_outofrange:
msg = _("internal error: out of range error");
- goto common_error;
+ break;
case bfd_reloc_notsupported:
msg = _("internal error: unsupported relocation error");
- goto common_error;
+ break;
case bfd_reloc_dangerous:
msg = _("internal error: dangerous relocation");
- goto common_error;
-
- case bfd_reloc_other:
- msg = _("could not locate special linker symbol __gp");
- goto common_error;
-
- case bfd_reloc_continue:
- msg = _("could not locate special linker symbol __ep");
- goto common_error;
+ break;
- case (bfd_reloc_dangerous + 1):
- msg = _("could not locate special linker symbol __ctbp");
- goto common_error;
-
default:
msg = _("internal error: unknown error");
- /* fall through */
+ break;
+ }
- common_error:
- if (!((*info->callbacks->warning)
- (info, msg, name, input_bfd, input_section,
- rel->r_offset)))
- return false;
+ if (msg)
+ r = info->callbacks->warning
+ (info, msg, name, input_bfd, input_section, rel->r_offset);
+
+ if (! r)
+ return false;
+ }
+ }
+
+ return true;
+}
+\f
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+fr30_elf_gc_mark_hook (abfd, info, rel, h, sym)
+ bfd * abfd;
+ 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))
+ {
+ case R_FR30_GNU_VTINHERIT:
+ case R_FR30_GNU_VTENTRY:
+ break;
+
+ 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 (abfd, sym->st_shndx);
+ }
+
+ return NULL;
+}
+
+/* Update the got entry reference counts for the section being removed. */
+
+static boolean
+fr30_elf_gc_sweep_hook (abfd, info, sec, relocs)
+ bfd * abfd ATTRIBUTE_UNUSED;
+ struct bfd_link_info * info ATTRIBUTE_UNUSED;
+ asection * sec ATTRIBUTE_UNUSED;
+ const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
+{
+ 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. */
+
+static boolean
+fr30_elf_check_relocs (abfd, info, sec, relocs)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ asection *sec;
+ const Elf_Internal_Rela *relocs;
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+
+ if (info->relocateable)
+ return true;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
+ if (!elf_bad_symtab (abfd))
+ sym_hashes_end -= symtab_hdr->sh_info;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ struct elf_link_hash_entry *h;
+ unsigned long r_symndx;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ /* This relocation describes the C++ object vtable hierarchy.
+ Reconstruct it for later use during GC. */
+ case R_FR30_GNU_VTINHERIT:
+ if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+ return false;
+ break;
+
+ /* This relocation describes which C++ vtable entries are actually
+ used. Record for later use during GC. */
+ case R_FR30_GNU_VTENTRY:
+ if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+ return false;
+ break;
+ }
+ }
return true;
}
\f
#define ELF_ARCH bfd_arch_fr30
-#define ELF_MACHINE_CODE EM_CYGNUS_FR30
+#define ELF_MACHINE_CODE EM_FR30
+#define ELF_MACHINE_ALT1 EM_CYGNUS_FR30
#define ELF_MAXPAGESIZE 0x1000
#define TARGET_BIG_SYM bfd_elf32_fr30_vec
#define elf_info_to_howto_rel NULL
#define elf_info_to_howto fr30_info_to_howto_rela
#define elf_backend_relocate_section fr30_elf_relocate_section
+#define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook
+#define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook
+#define elf_backend_check_relocs fr30_elf_check_relocs
+
+#define elf_backend_can_gc_sections 1
#define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup
-
+
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / blobdiff