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* coff-a29k.c (a29k_reloc): Change handling of R_IREL reloc to be

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compatible with AMD generated COFF files.  Try to support both AMD
	and GNU formats simultaneously.
	(coff_a29k_relocate_section): Likewise.
This commit is contained in:
Ian Lance Taylor 1995-11-09 02:30:33 +00:00
parent a071b8e9b3
commit 33698029db
2 changed files with 36 additions and 5 deletions
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5
bfd/ChangeLog
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@ -5,6 +5,11 @@ Wed Nov 8 20:03:44 1995 Eric Freudenthal <freudenthal@nyu.edu>
Wed Nov 8 11:31:11 1995 Ian Lance Taylor <ian@cygnus.com>
* coff-a29k.c (a29k_reloc): Change handling of R_IREL reloc to be
compatible with AMD generated COFF files. Try to support both AMD
and GNU formats simultaneously.
(coff_a29k_relocate_section): Likewise.
* libbfd.c (bfd_get_file_window): Change writable parameter from
int to boolean; update all callers. Pass MAP_SHARED if not
writable--it's required on Solaris. Cast fprintf argument to

36
bfd/coff-a29k.c
View File

@ -134,18 +134,23 @@ a29k_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
signed_value = EXTRACT_HWORD(insn);
signed_value = SIGN_EXTEND_HWORD(signed_value);
signed_value <<= 2;
signed_value += sym_value + reloc_entry->addend;
if (((signed_value + reloc_entry->address) & ~0x3ffff) == 0)
/* See the note on the R_IREL reloc in coff_a29k_relocate_section. */
if (signed_value == - (long) reloc_entry->address)
signed_value = 0;
signed_value += sym_value + reloc_entry->addend;
if ((signed_value & ~0x3ffff) == 0)
{ /* Absolute jmp/call */
insn |= (1<<24); /* Make it absolute */
signed_value += reloc_entry->address;
/* FIXME: Should we change r_type to R_IABS */
}
else
{
/* Relative jmp/call, so subtract from the value the
address of the place we're coming from */
signed_value -= (input_section->output_section->vma
signed_value -= (reloc_entry->address
+ input_section->output_section->vma
+ input_section->output_offset);
if (signed_value>0x1ffff || signed_value<-0x20000)
return(bfd_reloc_overflow);
@ -422,8 +427,29 @@ coff_a29k_relocate_section (output_bfd, info, input_bfd, input_section,
signed_value = SIGN_EXTEND_HWORD (signed_value);
signed_value <<= 2;
/* Unfortunately, there are two different versions of COFF
a29k. In the original AMD version, the value stored in
the field for the R_IREL reloc is a simple addend. In
the GNU version, the value is the negative of the address
of the reloc within section. We try to cope here by
assuming the AMD version, unless the addend is exactly
the negative of the address; in the latter case we assume
the GNU version. This means that something like
.text
nop
jmp i-4
will fail, because the addend of -4 will happen to equal
the negative of the address within the section. The
compiler will never generate code like this.
At some point in the future we may want to take out this
check. */
if (signed_value == - (long) (rel->r_vaddr - input_section->vma))
signed_value = 0;
/* Determine the destination of the jump. */
signed_value += val + rel->r_vaddr - input_section->vma;
signed_value += val;
if ((signed_value & ~0x3ffff) == 0)
{