diff options
| author | Eric Andersen <andersen@codepoet.org> | 2004-03-18 08:00:40 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2004-03-18 08:00:40 +0000 |
| commit | 38cd8e780fc6375117e8bc7db2eca17764779bba (patch) | |
| tree | 073dc72b76f28d38edf4846aded0328aebfce1e2 /ldso/ldso/powerpc/dl-startup.h | |
| parent | a740502a3d857a70f64fe31fda87b775d4cf1126 (diff) | |
Joakim Tjernlund writes:
Hi
I just noticed that gcc has an "b"(Address base register) operand that
will match all "r" registers but r0. It is a better fix then adding
r0 to the clobber list.
What do you think?
Diffstat (limited to 'ldso/ldso/powerpc/dl-startup.h')
| -rw-r--r-- | ldso/ldso/powerpc/dl-startup.h | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/ldso/ldso/powerpc/dl-startup.h b/ldso/ldso/powerpc/dl-startup.h index a167ae866..b33d6c5a7 100644 --- a/ldso/ldso/powerpc/dl-startup.h +++ b/ldso/ldso/powerpc/dl-startup.h @@ -54,20 +54,16 @@ asm("" \ * call the _dl_elf_main function. */ -/* hgb@ifi.uio.no: - * Adding a clobber list consisting of r0 for %1. addi on PowerPC - * takes a register as the second argument, but if the register is - * r0, the value 0 is used instead. If r0 is used here, the stack - * pointer (r1) will be zeroed, and the dynamically linked - * application will seg.fault immediatly when receiving control. +/* + * Use "b"(Address base register) operand for %1 since "b" excludes + * r0 which is important for the addi instruction in this case. */ #define START() \ __asm__ volatile ( \ "addi 1,%1,0\n\t" \ "mtlr %0\n\t" \ "blrl\n\t" \ - : : "r" (_dl_elf_main), "r" (args) \ - : "r0") + : : "r" (_dl_elf_main), "b" (args)) |