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* write.c (size_seg): Check adjustment to last frag.

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(SUB_SEGMENT_ALIGN): If HANDLE_ALIGN defined, pad out last frag to
	section alignment.
	* config/obj-coff.c (SUB_SEGMENT_ALIGN): Likewise.
	* config/obj-ieee.c (SUB_SEGMENT_ALIGN): Likewise.
	(write_object_file): Invoke md_do_align if available, and use
	frag_align_code on text sections.
	* config/obj-vms.h (SUB_SEGMENT_ALIGN): Now two args.
	* config/tc-m88k.h (SUB_SEGMENT_ALIGN): Likewise.
	* config/tc-ppc.h (SUB_SEGMENT_ALIGN): Likewise.
	* config/tc-sh.h (SUB_SEGMENT_ALIGN): Likewise.
	* config/tc-i386.h (SUB_SEGMENT_ALIGN): Likewise.  Define for
	BFD_ASSEMBLER too.
This commit is contained in:
Alan Modra 2002-05-23 08:08:48 +00:00
parent 9d66a1d9d6
commit 18e1d48773
9 changed files with 109 additions and 35 deletions
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16
gas/ChangeLog
View file

@ -1,3 +1,19 @@
2002-05-23 Alan Modra <amodra@bigpond.net.au>
* write.c (size_seg): Check adjustment to last frag.
(SUB_SEGMENT_ALIGN): If HANDLE_ALIGN defined, pad out last frag to
section alignment.
* config/obj-coff.c (SUB_SEGMENT_ALIGN): Likewise.
* config/obj-ieee.c (SUB_SEGMENT_ALIGN): Likewise.
(write_object_file): Invoke md_do_align if available, and use
frag_align_code on text sections.
* config/obj-vms.h (SUB_SEGMENT_ALIGN): Now two args.
* config/tc-m88k.h (SUB_SEGMENT_ALIGN): Likewise.
* config/tc-ppc.h (SUB_SEGMENT_ALIGN): Likewise.
* config/tc-sh.h (SUB_SEGMENT_ALIGN): Likewise.
* config/tc-i386.h (SUB_SEGMENT_ALIGN): Likewise. Define for
BFD_ASSEMBLER too.
2002-05-22 H.J. Lu <hjl@gnu.org>
* dwarf2dbg.c (dwarf2_directive_loc): Call listing_source_file

34
gas/config/obj-coff.c
View file

@ -3420,6 +3420,19 @@ remove_subsegs ()
unsigned long machine;
int coff_flags;
#ifndef SUB_SEGMENT_ALIGN
#ifdef HANDLE_ALIGN
/* The last subsegment gets an aligment corresponding to the alignment
of the section. This allows proper nop-filling at the end of
code-bearing sections. */
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
(!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \
? get_recorded_alignment (SEG) : 0)
#else
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 1
#endif
#endif
extern void
write_object_file ()
{
@ -3443,28 +3456,27 @@ write_object_file ()
string_byte_count = 4;
/* Run through all the sub-segments and align them up. Also
close any open frags. We tack a .fill onto the end of the
frag chain so that any .align's size can be worked by looking
at the next frag. */
for (frchain_ptr = frchain_root;
frchain_ptr != (struct frchain *) NULL;
frchain_ptr = frchain_ptr->frch_next)
{
/* Run through all the sub-segments and align them up. Also
close any open frags. We tack a .fill onto the end of the
frag chain so that any .align's size can be worked by looking
at the next frag. */
int alignment;
subseg_set (frchain_ptr->frch_seg, frchain_ptr->frch_subseg);
#ifndef SUB_SEGMENT_ALIGN
#define SUB_SEGMENT_ALIGN(SEG) 1
#endif
alignment = SUB_SEGMENT_ALIGN (now_seg, frchain_ptr)
#ifdef md_do_align
md_do_align (SUB_SEGMENT_ALIGN (now_seg), (char *) NULL, 0, 0,
alignment_done);
md_do_align (alignment, (char *) NULL, 0, 0, alignment_done);
#endif
if (subseg_text_p (now_seg))
frag_align_code (SUB_SEGMENT_ALIGN (now_seg), 0);
frag_align_code (alignment, 0);
else
frag_align (SUB_SEGMENT_ALIGN (now_seg), 0, 0);
frag_align (alignment, 0, 0);
#ifdef md_do_align
alignment_done:

41
gas/config/obj-ieee.c
View file

@ -493,6 +493,20 @@ obj_symbol_new_hook (symbolP)
}
#if 1
#ifndef SUB_SEGMENT_ALIGN
#ifdef HANDLE_ALIGN
/* The last subsegment gets an aligment corresponding to the alignment
of the section. This allows proper nop-filling at the end of
code-bearing sections. */
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
(!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \
? get_recorded_alignment (SEG) : 0)
#else
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2
#endif
#endif
extern void
write_object_file ()
{
@ -512,20 +526,33 @@ write_object_file ()
subseg_set (1, 0);
subseg_set (2, 0);
subseg_set (3, 0);
/* Run through all the sub-segments and align them up. Also
close any open frags. We tack a .fill onto the end of the
frag chain so that any .align's size can be worked by looking
at the next frag. */
for (frchain_ptr = frchain_root;
frchain_ptr != (struct frchain *) NULL;
frchain_ptr = frchain_ptr->frch_next)
{
/* Run through all the sub-segments and align them up. Also
close any open frags. We tack a .fill onto the end of the
frag chain so that any .align's size can be worked by looking
at the next frag. */
int alignment;
subseg_set (frchain_ptr->frch_seg, frchain_ptr->frch_subseg);
#ifndef SUB_SEGMENT_ALIGN
#define SUB_SEGMENT_ALIGN(SEG) 2
alignment = SUB_SEGMENT_ALIGN (now_seg, frchain_ptr)
#ifdef md_do_align
md_do_align (alignment, (char *) NULL, 0, 0, alignment_done);
#endif
frag_align (SUB_SEGMENT_ALIGN (now_seg), 0, 0);
if (subseg_text_p (now_seg))
frag_align_code (alignment, 0);
else
frag_align (alignment, 0, 0);
#ifdef md_do_align
alignment_done:
#endif
frag_wane (frag_now);
frag_now->fr_fix = 0;
know (frag_now->fr_next == NULL);

8
gas/config/obj-vms.h
View file

@ -1,6 +1,6 @@
/* VMS object file format
Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
Free Software Foundation, Inc.
Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000,
2002 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
@ -33,8 +33,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
* Doing the alignment here (on initialized data) can
* mess up the calculation of global data PSECT sizes.
*/
#define SUB_SEGMENT_ALIGN(SEG) \
(((SEG) == data_section) ? 0 : LONGWORD_ALIGNMENT)
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
(((SEG) == data_section) ? 0 : LONGWORD_ALIGNMENT)
/* This flag is used to remember whether we are in the const or the
data section. By and large they are identical, but we set a no-write

6
gas/config/tc-i386.h
View file

@ -116,6 +116,8 @@ extern const char *i386_target_format PARAMS ((void));
extern void i386_elf_emit_arch_note PARAMS ((void));
#endif
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
#else /* ! BFD_ASSEMBLER */
/* COFF STUFF */
@ -131,7 +133,7 @@ extern int tc_coff_sizemachdep PARAMS ((fragS *frag));
#ifdef TE_GO32
/* DJGPP now expects some sections to be 2**4 aligned. */
#define SUB_SEGMENT_ALIGN(SEG) \
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
((strcmp (obj_segment_name (SEG), ".text") == 0 \
|| strcmp (obj_segment_name (SEG), ".data") == 0 \
|| strcmp (obj_segment_name (SEG), ".bss") == 0 \
@ -141,7 +143,7 @@ extern int tc_coff_sizemachdep PARAMS ((fragS *frag));
? 4 \
: 2)
#else
#define SUB_SEGMENT_ALIGN(SEG) 2
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2
#endif
#define TC_RVA_RELOC 7

6
gas/config/tc-m88k.h
View file

@ -1,8 +1,8 @@
/* m88k.h -- Assembler for the Motorola 88000
Contributed by Devon Bowen of Buffalo University
and Torbjorn Granlund of the Swedish Institute of Computer Science.
Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
Free Software Foundation, Inc.
Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000,
2002 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
@ -98,7 +98,7 @@ struct reloc_info_m88k
#ifndef max
#define max(a,b) (((a) > (b)) ? (a) : (b))
#endif
#define SUB_SEGMENT_ALIGN(SEG) max (section_alignment[(int) (SEG)], 4)
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) max (section_alignment[(int) (SEG)], 4)
/* Fill in rs_align_code fragments. */
extern void m88k_handle_align PARAMS ((fragS *));

2
gas/config/tc-ppc.h
View file

@ -198,7 +198,7 @@ extern void ppc_adjust_symtab PARAMS ((void));
/* Niclas Andersson <nican@ida.liu.se> says this is needed. */
extern int ppc_subseg_align PARAMS ((void));
#define SUB_SEGMENT_ALIGN(SEG) ppc_subseg_align()
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) ppc_subseg_align ()
/* We also need to copy, in particular, the class of the symbol,
over what obj-coff would otherwise have copied. */

2
gas/config/tc-sh.h
View file

@ -152,7 +152,7 @@ extern int tc_coff_sizemachdep PARAMS ((fragS *));
#endif
/* We align most sections to a 16 byte boundary. */
#define SUB_SEGMENT_ALIGN(SEG) \
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
(strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \
? 0 \
: ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \

29
gas/write.c
View file

@ -678,7 +678,14 @@ size_seg (abfd, sec, xxx)
while (fragp->fr_next != last)
fragp = fragp->fr_next;
last->fr_address = size;
fragp->fr_offset += newsize - size;
if ((newsize - size) % fragp->fr_var == 0)
fragp->fr_offset += (newsize - size) / fragp->fr_var;
else
/* If we hit this abort, it's likely due to subsegs_finish not
providing sufficient alignment on the last frag, and the
machine dependent code using alignment frags with fr_var
greater than 1. */
abort ();
}
#ifdef tc_frob_section
@ -1418,10 +1425,19 @@ set_segment_vma (abfd, sec, xxx)
makes calculating their intended length trivial. */
#ifndef SUB_SEGMENT_ALIGN
#ifdef BFD_ASSEMBLER
#define SUB_SEGMENT_ALIGN(SEG) (0)
#ifdef HANDLE_ALIGN
/* The last subsegment gets an aligment corresponding to the alignment
of the section. This allows proper nop-filling at the end of
code-bearing sections. */
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
(!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \
? get_recorded_alignment (SEG) : 0)
#else
#define SUB_SEGMENT_ALIGN(SEG) (2)
#ifdef BFD_ASSEMBLER
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
#else
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2
#endif
#endif
#endif
@ -1432,14 +1448,15 @@ subsegs_finish ()
for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
{
int alignment;
int alignment = 0;
subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
/* This now gets called even if we had errors. In that case,
any alignment is meaningless, and, moreover, will look weird
if we are generating a listing. */
alignment = had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg);
if (!had_errors ())
alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP);
if (subseg_text_p (now_seg))
frag_align_code (alignment, 0);