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authorIan Lance Taylor <ian@airs.com>1992-10-20 20:10:34 +0000
committerIan Lance Taylor <ian@airs.com>1992-10-20 20:10:34 +0000
commit6142210d1d7bcfafaa2a31327b97a354024719c1 (patch)
treefebb27d4bf5a8681c2f6a75ed466de538c7929ea
parent653912459d4f9ff97b6696f001b57473ba21cc7b (diff)
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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.
-rw-r--r--gas/config/ChangeLog12
-rw-r--r--gas/config/obj-coffbfd.c64
2 files changed, 39 insertions, 37 deletions
diff --git a/gas/config/ChangeLog b/gas/config/ChangeLog
index b77555a..ff153e2 100644
--- a/gas/config/ChangeLog
+++ b/gas/config/ChangeLog
@@ -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.
diff --git a/gas/config/obj-coffbfd.c b/gas/config/obj-coffbfd.c
index 3e79b7b..5ed7656 100644
--- a/gas/config/obj-coffbfd.c
+++ b/gas/config/obj-coffbfd.c
@@ -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;