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* config/tc-mips.c (macro): Pass NULL for expression argument to

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macro_build for nori case.
	(SWITCH_TABLE): Define.
	(mips_force_relocation): Force a relocation for a switch table
	entry.
	(md_apply_fix): Write switch table entry value into file.
	(tc_gen_reloc): Use BFD_RELOC_GPREL32 for a switch table entry,
	and set the addend to the difference between the reloc address and
	the subtrahend.
This commit is contained in:
Ian Lance Taylor
1994-04-07 18:33:09 +00:00
parent dabf906e9b
commit 1c803e5223
2 changed files with 48 additions and 6 deletions
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12
gas/ChangeLog
View File

@@ -1,3 +1,15 @@
Thu Apr 7 14:28:30 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
* config/tc-mips.c (macro): Pass NULL for expression argument to
macro_build for nori case.
(SWITCH_TABLE): Define.
(mips_force_relocation): Force a relocation for a switch table
entry.
(md_apply_fix): Write switch table entry value into file.
(tc_gen_reloc): Use BFD_RELOC_GPREL32 for a switch table entry,
and set the addend to the difference between the reloc address and
the subtrahend.
Thu Apr 7 10:38:18 1994 Jeffrey A. Law (law@snake.cs.utah.edu)
* config/tc-hppa.h (elf_tc_symbol): Delete. No longer used.

42
gas/config/tc-mips.c
View File

@@ -1789,7 +1789,7 @@ macro (ip)
{
macro_build ((char *) NULL, &icnt, &imm_expr, "ori", "t,r,i",
treg, sreg, (int) BFD_RELOC_LO16);
macro_build ((char *) NULL, &icnt, &imm_expr, "nor", "d,v,t",
macro_build ((char *) NULL, &icnt, NULL, "nor", "d,v,t",
treg, treg, 0);
}
return;
@@ -5063,15 +5063,29 @@ cons_fix_new_mips (frag, where, nbytes, exp)
nbytes == 2 ? BFD_RELOC_16 : BFD_RELOC_32);
}
/* When generating embedded PIC code we need to use a special
relocation to represent the difference of two symbols in the .text
section (switch tables use a difference of this sort). See
include/coff/mips.h for details. This macro checks whether this
fixup requires the special reloc. */
#define SWITCH_TABLE(fixp) \
((fixp)->fx_r_type == BFD_RELOC_32 \
&& (fixp)->fx_addsy != NULL \
&& (fixp)->fx_subsy != NULL \
&& S_GET_SEGMENT ((fixp)->fx_addsy) == text_section \
&& S_GET_SEGMENT ((fixp)->fx_subsy) == text_section)
/* When generating embedded PIC code we must keep all PC relative
relocations, in case the linker has to relax a call. */
relocations, in case the linker has to relax a call. We also need
to keep relocations for switch table entries. */
/*ARGSUSED*/
int
mips_force_relocation (fixp)
fixS *fixp;
{
return fixp->fx_pcrel && mips_pic == EMBEDDED_PIC;
return (mips_pic == EMBEDDED_PIC
&& (fixp->fx_pcrel || SWITCH_TABLE (fixp)));
}
/* Apply a fixup to the object file. */
@@ -5108,8 +5122,11 @@ md_apply_fix (fixP, valueP)
case BFD_RELOC_32:
/* If we are deleting this reloc entry, we must fill in the
value now. This can happen if we have a .word which is not
resolved when it appears but is later defined. */
if (fixP->fx_done)
resolved when it appears but is later defined. We also need
to fill in the value if this is an embedded PIC switch table
entry. */
if (fixP->fx_done
|| (mips_pic == EMBEDDED_PIC && SWITCH_TABLE (fixP)))
md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
value, 4);
break;
@@ -5936,7 +5953,20 @@ tc_gen_reloc (section, fixp)
reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
if (fixp->fx_pcrel == 0)
if (mips_pic == EMBEDDED_PIC
&& SWITCH_TABLE (fixp))
{
/* For a switch table entry we use a special reloc. The addend
is actually the difference between the reloc address and the
subtrahend. */
reloc->addend = reloc->address - S_GET_VALUE (fixp->fx_subsy);
#ifndef OBJ_ECOFF
#error Double check fx_r_type here
#endif
fixp->fx_r_type = BFD_RELOC_GPREL32;
}
else if (fixp->fx_pcrel == 0)
reloc->addend = fixp->fx_addnumber;
else
{