/* BFD back-end for Intel 386 COFF files.
- Copyright 1990, 91, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
+ Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999
+ Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
static reloc_howto_type *coff_i386_rtype_to_howto
PARAMS ((bfd *, asection *, struct internal_reloc *,
struct coff_link_hash_entry *, struct internal_syment *,
-
bfd_vma *));
+static reloc_howto_type *coff_i386_reloc_type_lookup
+ PARAMS ((bfd *, bfd_reloc_code_real_type));
+static const bfd_target *i3coff_object_p PARAMS ((bfd *));
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
/* The page size is a guess based on ELF. */
arelent *reloc_entry;
asymbol *symbol;
PTR data;
- asection *input_section;
+ asection *input_section ATTRIBUTE_UNUSED;
bfd *output_bfd;
- char **error_message;
+ char **error_message ATTRIBUTE_UNUSED;
{
symvalue diff;
if (bfd_is_com_section (symbol->section))
{
+#ifndef COFF_WITH_PE
/* We are relocating a common symbol. The current value in the
object file is ORIG + OFFSET, where ORIG is the value of the
common symbol as seen by the object file when it was compiled
the common symbol which we are going to put in the final
object file. NEW is symbol->value. */
diff = symbol->value + reloc_entry->addend;
+#else
+ /* In PE mode, we do not offset the common symbol. */
+ diff = reloc_entry->addend;
+#endif
}
else
{
#ifdef COFF_WITH_PE
/* FIXME: How should this case be handled? */
- if (reloc_entry->howto->type == R_IMAGEBASE && diff != 0)
- abort ();
+ if (reloc_entry->howto->type == R_IMAGEBASE)
+ diff -= pe_data (output_bfd)->pe_opthdr.ImageBase;
#endif
#define DOIT(x) \
appear in the output .reloc section. */
static boolean in_reloc_p(abfd, howto)
- bfd * abfd;
+ bfd * abfd ATTRIBUTE_UNUSED;
reloc_howto_type *howto;
{
return ! howto->pc_relative && howto->type != R_IMAGEBASE;
static reloc_howto_type howto_table[] =
{
- {0},
- {1},
- {2},
- {3},
- {4},
- {5},
+ EMPTY_HOWTO (0),
+ EMPTY_HOWTO (1),
+ EMPTY_HOWTO (2),
+ EMPTY_HOWTO (3),
+ EMPTY_HOWTO (4),
+ EMPTY_HOWTO (5),
HOWTO (R_DIR32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
true), /* pcrel_offset */
- /* {7}, */
+ /* PE IMAGE_REL_I386_DIR32NB relocation (7). */
HOWTO (R_IMAGEBASE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
- {010},
- {011},
- {012},
- {013},
- {014},
- {015},
- {016},
- HOWTO (R_RELBYTE, /* type */
+ EMPTY_HOWTO (010),
+ EMPTY_HOWTO (011),
+ EMPTY_HOWTO (012),
+ EMPTY_HOWTO (013),
+ EMPTY_HOWTO (014),
+ EMPTY_HOWTO (015),
+ EMPTY_HOWTO (016),
+ /* Byte relocation (017). */
+ HOWTO (R_RELBYTE, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
0x000000ff, /* src_mask */
0x000000ff, /* dst_mask */
PCRELOFFSET), /* pcrel_offset */
+ /* 16-bit word relocation (020). */
HOWTO (R_RELWORD, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
PCRELOFFSET), /* pcrel_offset */
+ /* 32-bit longword relocation (021). */
HOWTO (R_RELLONG, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
PCRELOFFSET), /* pcrel_offset */
+ /* Byte PC relative relocation (022). */
HOWTO (R_PCRBYTE, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0x000000ff, /* src_mask */
0x000000ff, /* dst_mask */
PCRELOFFSET), /* pcrel_offset */
+ /* 16-bit word PC relative relocation (023). */
HOWTO (R_PCRWORD, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
PCRELOFFSET), /* pcrel_offset */
+ /* 32-bit longword PC relative relocation (024). */
HOWTO (R_PCRLONG, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
#define BADMAG(x) I386BADMAG(x)
#define I386 1 /* Customize coffcode.h */
-#define RTYPE2HOWTO(cache_ptr, dst) \
- (cache_ptr)->howto = howto_table + (dst)->r_type;
+#define RTYPE2HOWTO(cache_ptr, dst) \
+ ((cache_ptr)->howto = \
+ ((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \
+ ? howto_table + (dst)->r_type \
+ : NULL))
/* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
library. On some other COFF targets STYP_BSS is normally
cache_ptr->addend += asect->vma; \
}
-/* We use the special COFF backend linker. */
+/* We use the special COFF backend linker. For normal i386 COFF, we
+ can use the generic relocate_section routine. For PE, we need our
+ own routine. */
+
+#ifndef COFF_WITH_PE
+
#define coff_relocate_section _bfd_coff_generic_relocate_section
+#else /* COFF_WITH_PE */
+
+/* The PE relocate section routine. The only difference between this
+ and the regular routine is that we don't want to do anything for a
+ relocateable link. */
+
+static boolean coff_pe_i386_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ struct internal_reloc *, struct internal_syment *, asection **));
+
+static boolean
+coff_pe_i386_relocate_section (output_bfd, info, input_bfd,
+ input_section, contents, relocs, syms,
+ sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ struct internal_reloc *relocs;
+ struct internal_syment *syms;
+ asection **sections;
+{
+ if (info->relocateable)
+ return true;
+
+ return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,
+ input_section, contents,
+ relocs, syms, sections);
+}
+
+#define coff_relocate_section coff_pe_i386_relocate_section
+
+#endif /* COFF_WITH_PE */
+
+/* Convert an rtype to howto for the COFF backend linker. */
+
static reloc_howto_type *
coff_i386_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
- bfd *abfd;
+ bfd *abfd ATTRIBUTE_UNUSED;
asection *sec;
struct internal_reloc *rel;
struct coff_link_hash_entry *h;
struct internal_syment *sym;
bfd_vma *addendp;
{
-
reloc_howto_type *howto;
+ if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0]))
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
+ }
+
howto = howto_table + rel->r_type;
#ifdef COFF_WITH_PE
+ /* Cancel out code in _bfd_coff_generic_relocate_section. */
*addendp = 0;
#endif
BFD_ASSERT (h != NULL);
-
#ifndef COFF_WITH_PE
- /* I think we *do* want to bypass this. If we don't, I have seen some data
- parameters get the wrong relcation address. If I link two versions
- with and without this section bypassed and then do a binary comparison,
- the addresses which are different can be looked up in the map. The
- case in which this section has been bypassed has addresses which correspond
- to values I can find in the map */
+ /* I think we *do* want to bypass this. If we don't, I have
+ seen some data parameters get the wrong relocation address.
+ If I link two versions with and without this section bypassed
+ and then do a binary comparison, the addresses which are
+ different can be looked up in the map. The case in which
+ this section has been bypassed has addresses which correspond
+ to values I can find in the map. */
*addendp -= sym->n_value;
#endif
}
+#ifndef COFF_WITH_PE
/* If the output symbol is common (in which case this must be a
relocateable link), we need to add in the final size of the
common symbol. */
if (h != NULL && h->root.type == bfd_link_hash_common)
*addendp += h->root.u.c.size;
-
+#endif
#ifdef COFF_WITH_PE
if (howto->pc_relative)
- *addendp -= 4;
+ {
+ *addendp -= 4;
+
+ /* If the symbol is defined, then the generic code is going to
+ add back the symbol value in order to cancel out an
+ adjustment it made to the addend. However, we set the addend
+ to 0 at the start of this function. We need to adjust here,
+ to avoid the adjustment the generic code will make. FIXME:
+ This is getting a bit hackish. */
+ if (sym != NULL && sym->n_scnum != 0)
+ *addendp -= sym->n_value;
+ }
if (rel->r_type == R_IMAGEBASE)
{
return howto;
}
-
#define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup
-
static reloc_howto_type *
coff_i386_reloc_type_lookup (abfd, code)
- bfd *abfd;
+ bfd *abfd ATTRIBUTE_UNUSED;
bfd_reloc_code_real_type code;
{
switch (code)
BFD_JUMP_TABLE_LINK (coff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
- COFF_SWAP_TABLE,
+ NULL,
+
+ COFF_SWAP_TABLE
};
projects / deliverable / binutils-gdb.git / blobdiff