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Tue Oct 20 13:02:25 1992 Ian Lance Taylor (ian@cygnus.com)

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* Support for i386-sysv.
	obj-coffbfd.c (do_relocs_for, write_object_file): set segment
	addresses to reasonable sizes.  New define ZERO_BASED_SEGMENTS can
	be used to set them all to zero as was done before.
	(fill_section): segment addresses now set in write_object_file.
	(fill_section): Don't set STYP_NOLOAD for .bss section.
	(fixup_segment): 386 uses strange common symbol format.
	tc-i386.c (tc_coff_fix2rtype): use R_DIR32, not R_RELLONG, for
	compatibility with SVR3.2 linker.
This commit is contained in:
Ian Lance Taylor 1992-10-20 20:10:34 +00:00
parent 653912459d
commit 6142210d1d
2 changed files with 39 additions and 37 deletions
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12
gas/config/ChangeLog
View File

@ -1,3 +1,15 @@
Tue Oct 20 13:02:25 1992 Ian Lance Taylor (ian@cygnus.com)
* Support for i386-sysv.
obj-coffbfd.c (do_relocs_for, write_object_file): set segment
addresses to reasonable sizes. New define ZERO_BASED_SEGMENTS can
be used to set them all to zero as was done before.
(fill_section): segment addresses now set in write_object_file.
(fill_section): Don't set STYP_NOLOAD for .bss section.
(fixup_segment): 386 uses strange common symbol format.
tc-i386.c (tc_coff_fix2rtype): use R_DIR32, not R_RELLONG, for
compatibility with SVR3.2 linker.
Mon Oct 5 09:28:57 1992 Steve Chamberlain (sac@thepub.cygnus.com)
fix i960+non-bfd coff bit rot.

64
gas/config/obj-coffbfd.c
View File

@ -436,12 +436,14 @@ void DEFUN(do_relocs_for,(abfd, file_cursor),
*file_cursor += external_reloc_size;
free( external_reloc_vec);
}
#if OLDWAY
This should work, but causes problems with addends in relocs.
Disable it for the moment
#ifndef ZERO_BASED_SEGMENTS
/* Supposedly setting segment addresses non-zero causes problems
for some platforms, although it shouldn't. If you define
ZERO_BASED_SEGMENTS, all the segments will be based at 0.
Please don't make this the default, since some systems (e.g.,
SVR3.2) require the segments to be non-zero based. Ian Taylor
<ian@cygnus.com>. */
addr += segment_info[idx].scnhdr.s_size;
#else
addr = 0;
#endif
}
}
@ -457,7 +459,6 @@ static void DEFUN(fill_section,(abfd, filehdr, file_cursor),
{
unsigned int i;
unsigned int paddr = 0;
for (i = SEG_E0; i < SEG_UNKNOWN; i++)
{
@ -470,20 +471,9 @@ static void DEFUN(fill_section,(abfd, filehdr, file_cursor),
fragS *frag = segment_info[i].frchainP->frch_root;
char *buffer = malloc(s->s_size);
if (s->s_size != 0)
{
s->s_scnptr = *file_cursor;
s->s_paddr = paddr;
s->s_vaddr = paddr;
}
else
{
s->s_scnptr = 0;
s->s_paddr = 0;
s->s_vaddr = 0;
}
s->s_flags = STYP_REG;
if (strcmp(s->s_name,".text")==0)
@ -491,7 +481,7 @@ static void DEFUN(fill_section,(abfd, filehdr, file_cursor),
else if (strcmp(s->s_name,".data")==0)
s->s_flags |= STYP_DATA;
else if (strcmp(s->s_name,".bss")==0)
s->s_flags |= STYP_BSS | STYP_NOLOAD;
s->s_flags |= STYP_BSS;
else if (strcmp(s->s_name,".lit")==0)
s->s_flags = STYP_LIT | STYP_TEXT;
@ -551,14 +541,6 @@ static void DEFUN(fill_section,(abfd, filehdr, file_cursor),
*file_cursor += s->s_size;
#if 0
This should work, but causes problems with addends in relocs.
Disable it for the moment
paddr += s->s_size;
#else
paddr = 0;
#endif
}
}
@ -1670,7 +1652,7 @@ extern void DEFUN_VOID(write_object_file)
struct internal_aouthdr aouthdr;
unsigned long file_cursor;
bfd *abfd;
unsigned int addr = 0;
unsigned int addr;
abfd = bfd_openw(out_file_name, TARGET_FORMAT);
@ -1709,31 +1691,34 @@ extern void DEFUN_VOID(write_object_file)
{
relax_segment(segment_info[i].frchainP->frch_root, i);
}
filehdr.f_nscns = 0;
/* Find out how big the sections are */
/* Find out how big the sections are, and set the addresses. */
addr = 0;
for (i = SEG_E0; i < SEG_UNKNOWN; i++)
{
segment_info[i].scnhdr.s_paddr = addr;
segment_info[i].scnhdr.s_vaddr = addr;
if (segment_info[i].scnhdr.s_name[0])
{
filehdr.f_nscns++;
}
#ifndef ZERO_BASED_SEGMENTS
/* See the comment at the previous ZERO_BASED_SEGMENTS check. */
if (i == SEG_E2)
{
/* THis is a special case, we leave the size alone, which will have */
/* been made up from all and any lcomms seen */
/* This is a special case, we leave the size alone, which
will have been made up from all and any lcomms seen. */
addr += segment_info[i].scnhdr.s_size;
}
else
{
addr += size_section(abfd, i);
}
#endif
}
@ -2261,9 +2246,14 @@ segT this_segment_type)
continue;
} /* COBR */
#endif /* TC_I960 */
#ifdef TC_I386
/* 386 COFF uses a peculiar format in
which the value of a common symbol is
stored in the .text segment (I've
checked this on SVR3.2 and SCO 3.2.2)
Ian Taylor <ian@cygnus.com>. */
add_number += S_GET_VALUE(add_symbolP);
#endif
break;