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64-bit sparc stabs are broken
- From: Alexandre Oliva <aoliva at redhat dot com>
- To: binutils at sources dot redhat dot com, gdb at sources dot redhat dot com
- Date: 15 Nov 2001 02:13:19 -0200
- Subject: 64-bit sparc stabs are broken
- Organization: GCC Team, Red Hat
The Solaris native assembler generates R_SPARC_32 relocations for
stabs, and so does the GNU assembler. However, unlike GNU ld,
Solaris' native linker disregards relocation overflows when resolving
such relocations in 64-bit mode: addresses start at 0x100000000, but
we get no complaint from Solaris ld, whereas GNU ld dies with a
relocation overflow message.
This patch arranges for GNU ld to ignore relocation overflows in the
.stabs section, which is necessary to get a Solaris 7/sparc
binutils+GCC bootstrap to complete. I still haven't checked whether
GDB is going to need any change in order to work correctly with 64-bit
executables.
The patch was approved by Richard Henderson. I'm checking it in.
Index: bfd/ChangeLog
from Alexandre Oliva <aoliva@redhat.com>
* elf64-sparc.c (sparc64_elf_relocate_section): Disregard
overflows in the .stab section.
Index: bfd/elf64-sparc.c
===================================================================
RCS file: /cvs/src/src/bfd/elf64-sparc.c,v
retrieving revision 1.41
diff -u -p -r1.41 elf64-sparc.c
--- bfd/elf64-sparc.c 2001/11/11 23:51:36 1.41
+++ bfd/elf64-sparc.c 2001/11/15 04:08:12
@@ -2627,6 +2627,16 @@ sparc64_elf_relocate_section (output_bfd
{
const char *name;
+ /* The Solaris native linker silently disregards
+ overflows. We don't, but this breaks stabs debugging
+ info, whose relocations are only 32-bits wide. Ignore
+ overflows in this case. */
+ if (r_type == R_SPARC_32
+ && (input_section->flags & SEC_DEBUGGING) != 0
+ && strcmp (bfd_section_name (input_bfd, input_section),
+ ".stab") == 0)
+ break;
+
if (h != NULL)
{
if (h->root.type == bfd_link_hash_undefweak
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist *Please* write to mailing lists, not to me