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PR gas/12049

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* frags.h (struct frag): Add "region" field.
	* write.c (relax_frag): Don't add "stretch" to forward reference
	target if there is an intervening org or align.
	(relax_segment): Set region.
This commit is contained in:
Alan Modra 2010-10-19 12:00:33 +00:00
parent 8c540a24cf
commit e35a414d3c
3 changed files with 33 additions and 9 deletions
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8
gas/ChangeLog
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@ -1,3 +1,11 @@
2010-10-19 Alan Modra <amodra@gmail.com>
PR gas/12049
* frags.h (struct frag): Add "region" field.
* write.c (relax_frag): Don't add "stretch" to forward reference
target if there is an intervening org or align.
(relax_segment): Set region.
2010-10-18 Maciej W. Rozycki <macro@linux-mips.org>
* config/tc-mips.c (macro)[ldd_std]: Fix the relaxation variant

6
gas/frags.h
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@ -1,6 +1,6 @@
/* frags.h - Header file for the frag concept.
Copyright 1987, 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
2002, 2003, 2004, 2005, 2006, 2007, 2010 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
@ -68,6 +68,10 @@ struct frag {
struct list_info_struct *line;
#endif
/* A serial number for a sequence of frags having at most one alignment
or org frag, and that at the tail of the sequence. */
unsigned int region:16;
/* Flipped each relax pass so we can easily determine whether
fr_address has been adjusted. */
unsigned int relax_marker:1;

28
gas/write.c
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@ -1,7 +1,7 @@
/* write.c - emit .o file
Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
2010 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
@ -2148,16 +2148,21 @@ relax_frag (segT segment, fragS *fragP, long stretch)
|| sym_frag == &zero_address_frag);
target += S_GET_VALUE (symbolP);
/* If frag has yet to be reached on this pass,
assume it will move by STRETCH just as we did.
If this is not so, it will be because some frag
between grows, and that will force another pass. */
/* If SYM_FRAG has yet to be reached on this pass, assume it
will move by STRETCH just as we did, unless there is an
alignment frag between here and SYM_FRAG. An alignment may
well absorb any STRETCH, and we don't want to choose a larger
branch insn by overestimating the needed reach of this
branch. It isn't critical to calculate TARGET exactly; We
know we'll be doing another pass if STRETCH is non-zero. */
if (stretch != 0
&& sym_frag->relax_marker != fragP->relax_marker
&& S_GET_SEGMENT (symbolP) == segment)
{
target += stretch;
if (stretch < 0
|| sym_frag->region == fragP->region)
target += stretch;
}
}
@ -2245,6 +2250,7 @@ relax_segment (struct frag *segment_frag_root, segT segment, int pass)
unsigned long frag_count;
struct frag *fragP;
relax_addressT address;
int region;
int ret;
/* In case md_estimate_size_before_relax() wants to make fixSs. */
@ -2253,10 +2259,12 @@ relax_segment (struct frag *segment_frag_root, segT segment, int pass)
/* For each frag in segment: count and store (a 1st guess of)
fr_address. */
address = 0;
region = 0;
for (frag_count = 0, fragP = segment_frag_root;
fragP;
fragP = fragP->fr_next, frag_count ++)
{
fragP->region = region;
fragP->relax_marker = 0;
fragP->fr_address = address;
address += fragP->fr_fix;
@ -2285,12 +2293,16 @@ relax_segment (struct frag *segment_frag_root, segT segment, int pass)
}
address += offset;
region += 1;
}
break;
case rs_org:
case rs_space:
/* Assume .org is nugatory. It will grow with 1st relax. */
region += 1;
break;
case rs_space:
break;
case rs_machine_dependent: