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start at handling branch taken/branch not taken hints.

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This commit is contained in:
Michael Meissner
1995-09-22 20:42:38 +00:00
parent 02f85cda33
commit 25b1cdd0f3
2 changed files with 47 additions and 32 deletions
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7
gas/ChangeLog
View File

@ -1,3 +1,10 @@
Fri Sep 22 16:34:46 1995 Michael Meissner <meissner@tiktok.cygnus.com>
* config/tc-ppc.c (ppc_elf_suffix): Rewrite to use a table of
strings and relocations they represent. Add @br{,n}taken for
branch taken/not taken support.
(md_apply_fix3): Add BFD_RELOC_PPC_B16_BR{,N}TAKEN support.
Thu Sep 21 21:10:17 1995 Michael Meissner <meissner@cygnus.com> Thu Sep 21 21:10:17 1995 Michael Meissner <meissner@cygnus.com>
* config/tc-ppc.c (md_parse_option): -mrelocatable-lib now only * config/tc-ppc.c (md_parse_option): -mrelocatable-lib now only

68
gas/config/tc-ppc.c
View File

@ -554,41 +554,46 @@ static bfd_reloc_code_real_type
ppc_elf_suffix (str_p) ppc_elf_suffix (str_p)
char **str_p; char **str_p;
{ {
char *str = *str_p; struct map_bfd {
char *string;
int length;
bfd_reloc_code_real_type reloc;
};
if (*str != '@') char *str = *str_p;
int ch;
struct map_bfd *ptr;
static struct map_bfd mapping[] = {
{ "GOT", 3, BFD_RELOC_PPC_TOC16 },
{ "got", 3, BFD_RELOC_PPC_TOC16 },
{ "L", 1, BFD_RELOC_LO16 },
{ "l", 1, BFD_RELOC_LO16 },
{ "HA", 2, BFD_RELOC_HI16_S },
{ "ha", 2, BFD_RELOC_HI16_S },
{ "H", 1, BFD_RELOC_HI16 },
{ "h", 1, BFD_RELOC_HI16 },
{ "SDAREL", 6, BFD_RELOC_GPREL16 },
{ "sdarel", 6, BFD_RELOC_GPREL16 },
{ "FIXUP", 5, BFD_RELOC_CTOR }, /* synonym for BFD_RELOC_32 that doesn't get */
{ "fixup", 5, BFD_RELOC_CTOR }, /* warnings with -mrelocatable */
{ "BRTAKEN", 7, BFD_RELOC_PPC_B16_BRTAKEN },
{ "brtaken", 7, BFD_RELOC_PPC_B16_BRTAKEN },
{ "BRNTAKEN", 8, BFD_RELOC_PPC_B16_BRNTAKEN },
{ "brntaken", 8, BFD_RELOC_PPC_B16_BRNTAKEN },
{ (char *)0, 0, BFD_RELOC_UNUSED }
};
if (*str++ != '@')
return BFD_RELOC_UNUSED; return BFD_RELOC_UNUSED;
if (strncmp (str, "@GOT", 4) == 0 || strncmp (str, "@got", 4) == 0) ch = *str;
for (ptr = &mapping[0]; ptr->length > 0; ptr++)
if (ch == ptr->string[0] && strncmp (str, ptr->string, ptr->length) == 0)
{ {
*str_p += 4; *str_p = str + ptr->length;
return BFD_RELOC_PPC_TOC16; return ptr->reloc;
} }
else if (strncmp (str, "@L", 2) == 0 || strncmp (str, "@l", 2) == 0)
{
*str_p += 2;
return BFD_RELOC_LO16;
}
else if (strncmp (str, "@HA", 3) == 0 || strncmp (str, "@ha", 3) == 0)
{
*str_p += 3;
return BFD_RELOC_HI16_S;
}
else if (strncmp (str, "@H", 2) == 0 || strncmp (str, "@h", 2) == 0)
{
*str_p += 2;
return BFD_RELOC_HI16;
}
else if (strncmp (str, "@sdarel", 7) == 0 || strncmp (str, "@sdarel", 7) == 0)
{
*str_p += 7;
return BFD_RELOC_GPREL16;
}
else if (strncmp (str, "@FIXUP", 6) == 0 || strncmp (str, "@fixup", 6) == 0)
{
*str_p += 6;
return BFD_RELOC_CTOR; /* synonym for BFD_RELOC_32 that doesn't get */
} /* warnings with -mrelocatable */
return BFD_RELOC_UNUSED; return BFD_RELOC_UNUSED;
} }
@ -2790,6 +2795,9 @@ md_apply_fix3 (fixp, valuep, seg)
if (fixp->fx_pcrel) if (fixp->fx_pcrel)
abort (); abort ();
case BFD_RELOC_PPC_B16_BRTAKEN:
case BFD_RELOC_PPC_B16_BRNTAKEN:
value <<= 2;
md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where,
value, 2); value, 2);
break; break;