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On Wed, Mar 10, 2004 at 10:44:07AM -0800, Ulrich Drepper wrote:
> I applied the hopefully correct patch.
pt-vfork.S still needed similar changes.
The following patch works for me with LD_PRELOAD=pt-vfork.so:libpthread.so ./tst-vfork{1,2}
2004-03-10 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/ia64/pt-vfork.S (__vfork): Don't use
a local register for saving old PID. Negate PID in parent upon
exit.
--- libc/nptl/sysdeps/unix/sysv/linux/ia64/pt-vfork.S.jj 2004-03-10 20:02:20.000000000 +0100
+++ libc/nptl/sysdeps/unix/sysv/linux/ia64/pt-vfork.S 2004-03-10 20:14:25.288330129 +0100
@@ -32,22 +32,26 @@
ENTRY(__vfork)
.prologue // work around a GAS bug which triggers if
.body // first .prologue is not at the beginning of proc.
- alloc r2=ar.pfs,0,1,2,0
+ alloc r2=ar.pfs,0,0,2,0
adds r14=PID,r13
;;
- ld4 loc0=[r14]
+ ld4 r16=[r14]
;;
- sub r15=0,loc0
+ sub r15=0,r16
mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD
mov out1=0 /* Standard sp value. */
;;
st4 [r14]=r15
DO_CALL (SYS_ify (clone))
cmp.eq p0,p7=0,r8
- cmp.eq p6,p0=-1,r10
adds r14=PID,r13
;;
-(p7) st4 [r14]=loc0
+(p7) ld4 r16=[r14]
+ cmp.eq p6,p0=-1,r10
+ ;;
+(p7) sub r15=0,r16
+ ;;
+(p7) st4 [r14]=r15
(p6) br.cond.spnt.few __syscall_error
ret
PSEUDO_END(__vfork)
Jakub
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