/* Intel i860 specific support for 32-bit ELF.
- Copyright 1993, 2000 Free Software Foundation, Inc.
+ Copyright 1993, 1995, 1999, 2000, 2001, 2002
+ Free Software Foundation, Inc.
Full i860 support contributed by Jason Eckhardt <jle@cygnus.com>.
#include "elf-bfd.h"
#include "elf/i860.h"
-
/* Prototypes. */
static reloc_howto_type *lookup_howto
PARAMS ((unsigned int));
static reloc_howto_type *elf32_i860_reloc_type_lookup
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-static void elf32_i860_info_to_howto_rela
+static void elf32_i860_info_to_howto_rela
PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
static bfd_reloc_status_type elf32_i860_relocate_splitn
static bfd_reloc_status_type elf32_i860_relocate_pc16
PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
+static bfd_reloc_status_type elf32_i860_relocate_pc26
+ PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
+
static bfd_reloc_status_type elf32_i860_relocate_highadj
PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
-static boolean elf32_i860_relocate_section
+static boolean elf32_i860_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, bfd_vma));
-
+static boolean elf32_i860_is_local_label_name
+ PARAMS ((bfd *, const char *));
/* This howto table is preliminary. */
static reloc_howto_type elf32_i860_howto_table [] =
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
};
-
\f
static unsigned char elf_code_to_howto_index[R_860_max + 1];
return elf32_i860_howto_table + i;
}
-
/* Given a BFD reloc, return the matching HOWTO structure. */
static reloc_howto_type *
elf32_i860_reloc_type_lookup (abfd, code)
rtype = R_860_COPY;
break;
case BFD_RELOC_860_GLOB_DAT:
- rtype = R_860_GLOB_DAT;
+ rtype = R_860_GLOB_DAT;
break;
case BFD_RELOC_860_JUMP_SLOT:
rtype = R_860_JUMP_SLOT;
return lookup_howto (rtype);
}
-
/* Given a ELF reloc, return the matching HOWTO structure. */
static void
elf32_i860_info_to_howto_rela (abfd, bfd_reloc, elf_reloc)
arelent *bfd_reloc;
Elf64_Internal_Rela *elf_reloc;
{
- bfd_reloc->howto = lookup_howto (ELF32_R_TYPE (elf_reloc->r_info));
+ bfd_reloc->howto
+ = lookup_howto ((unsigned) ELF32_R_TYPE (elf_reloc->r_info));
}
-
-
\f
/* Specialized relocation handler for R_860_SPLITn. These relocations
involves a 16-bit field that is split into two contiguous parts. */
bfd_byte *contents;
bfd_vma value;
{
- bfd_vma insn, t;
+ bfd_vma insn;
reloc_howto_type *howto;
- howto = lookup_howto (ELF32_R_TYPE (rello->r_info));
+ howto = lookup_howto ((unsigned) ELF32_R_TYPE (rello->r_info));
insn = bfd_get_32 (input_bfd, contents + rello->r_offset);
- /* Remove encode bits and intervening bits. Then concatenate the
- two fields into one 16-bit quantity. */
- t = (insn & howto->src_mask);
- t = ((t >> 5) & 0xf8) | (t & 0x7ff);
-
/* Relocate. */
- value += (rello->r_addend + t);
+ value += rello->r_addend;
- /* Separate the fields and re-insert. */
+ /* Separate the fields and insert. */
value = (((value & 0xf8) << 5) | (value & 0x7ff)) & howto->dst_mask;
insn = (insn & ~howto->dst_mask) | value;
return bfd_reloc_ok;
}
-
/* Specialized relocation handler for R_860_PC16. This relocation
involves a 16-bit, PC-relative field that is split into two contiguous
parts. */
bfd_byte *contents;
bfd_vma value;
{
- bfd_vma insn, t;
+ bfd_vma insn;
reloc_howto_type *howto;
- howto = lookup_howto (ELF32_R_TYPE (rello->r_info));
+ howto = lookup_howto ((unsigned) ELF32_R_TYPE (rello->r_info));
insn = bfd_get_32 (input_bfd, contents + rello->r_offset);
/* Adjust for PC-relative relocation. */
+ input_section->output_offset);
value -= rello->r_offset;
- /* Remove encode bits and intervening bits. Then concatenate the
- two fields into one 16-bit quantity. */
- t = (insn & howto->src_mask);
- t = ((t >> 5) & 0xf8) | (t & 0x7ff);
-
/* Relocate. */
- value += (rello->r_addend + t);
+ value += rello->r_addend;
- /* Separate the fields and re-insert. */
+ /* Separate the fields and insert. */
value = (((value & 0xf8) << 5) | (value & 0x7ff)) & howto->dst_mask;
insn = (insn & ~howto->dst_mask) | value;
}
+/* Specialized relocation handler for R_860_PC26. This relocation
+ involves a 26-bit, PC-relative field which must be adjusted by 4. */
+static bfd_reloc_status_type
+elf32_i860_relocate_pc26 (input_bfd, input_section, rello, contents, value)
+ bfd *input_bfd;
+ asection *input_section;
+ Elf_Internal_Rela *rello;
+ bfd_byte *contents;
+ bfd_vma value;
+{
+ bfd_vma insn;
+ reloc_howto_type *howto;
+ howto = lookup_howto ((unsigned) ELF32_R_TYPE (rello->r_info));
+ insn = bfd_get_32 (input_bfd, contents + rello->r_offset);
+
+ /* Adjust for PC-relative relocation. */
+ value -= (input_section->output_section->vma
+ + input_section->output_offset);
+ value -= rello->r_offset;
+
+ /* Relocate. */
+ value += rello->r_addend;
+
+ /* Adjust value by 4 and insert the field. */
+ value = ((value - 4) >> howto->rightshift) & howto->dst_mask;
+ insn = (insn & ~howto->dst_mask) | value;
+
+ bfd_put_32 (input_bfd, insn, contents + rello->r_offset);
+ return bfd_reloc_ok;
+
+}
/* Specialized relocation handler for R_860_HIGHADJ. */
static bfd_reloc_status_type
value += ((rel->r_addend & 0x8000) << 1);
value += rel->r_addend;
value = ((value >> 16) & 0xffff);
- value = (value + (insn & 0xffff)) & 0xffff;
insn = (insn & 0xffff0000) | value;
return bfd_reloc_ok;
}
-
/* Perform a single relocation. By default we use the standard BFD
routines. However, we handle some specially. */
static bfd_reloc_status_type
rel->r_addend);
}
-
/* Relocate an i860 ELF section.
This is boiler-plate code copied from fr30.
- 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],
- if only to serve as a learning tool.
The RELOCATE_SECTION function is called by the new ELF backend linker
to handle the relocations for a section.
Elf_Internal_Rela * rel;
Elf_Internal_Rela * relend;
+ if (info->relocateable)
+ return true;
+
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
bfd_reloc_status_type r;
const char * name = NULL;
int r_type;
-
+
r_type = ELF32_R_TYPE (rel->r_info);
-
+
#if 0
if ( r_type == R_860_GNU_VTINHERIT
|| r_type == R_860_GNU_VTENTRY)
continue;
#endif
-
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (info->relocateable)
- {
- /* This is a relocateable link. We don't have to change
- anything, unless the reloc is against a section symbol,
- in which case we have to adjust according to where the
- section symbol winds up in the output section. */
- 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];
- rel->r_addend += sec->output_offset + sym->st_value;
- }
- }
+ r_symndx = ELF32_R_SYM (rel->r_info);
- continue;
- }
+ howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info));
+ h = NULL;
+ sym = NULL;
+ sec = NULL;
- /* This is a final link. */
- howto = lookup_howto (ELF32_R_TYPE (rel->r_info));
- 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)
{
relocation = 0;
}
}
-
+
switch (r_type)
{
default:
contents, relocation);
break;
+ case R_860_PC26:
+ r = elf32_i860_relocate_pc26 (input_bfd, input_section, rel,
+ contents, relocation);
+ break;
+
case R_860_SPLIT0:
case R_860_SPLIT1:
case R_860_SPLIT2:
case R_860_HIGOTOFF:
r = bfd_reloc_notsupported;
break;
- }
+ }
if (r != bfd_reloc_ok)
{
(info, name, howto->name, (bfd_vma) 0,
input_bfd, input_section, rel->r_offset);
break;
-
+
case bfd_reloc_undefined:
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");
break;
return true;
}
+/* Return whether a symbol name implies a local label. SVR4/860 compilers
+ generate labels of the form ".ep.function_name" to denote the end of a
+ function prolog. These should be local.
+ ??? Do any other SVR4 compilers have this convention? If so, this should
+ be added to the generic routine. */
+static boolean
+elf32_i860_is_local_label_name (abfd, name)
+ bfd *abfd;
+ const char *name;
+{
+ if (name[0] == '.' && name[1] == 'e' && name[2] == 'p' && name[3] == '.')
+ return true;
+ return _bfd_elf_is_local_label_name (abfd, name);
+}
\f
#define TARGET_BIG_SYM bfd_elf32_i860_vec
#define TARGET_BIG_NAME "elf32-i860"
#define ELF_MACHINE_CODE EM_860
#define ELF_MAXPAGESIZE 4096
+#define elf_backend_rela_normal 1
#define elf_info_to_howto_rel NULL
#define elf_info_to_howto elf32_i860_info_to_howto_rela
#define elf_backend_relocate_section elf32_i860_relocate_section
#define bfd_elf32_bfd_reloc_type_lookup elf32_i860_reloc_type_lookup
+#define bfd_elf32_bfd_is_local_label_name elf32_i860_is_local_label_name
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / blobdiff