diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2004-12-15 20:37:06 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-12-15 20:37:06 +0000 |
| commit | a2eae4ccb194af634ba6336cc2dce3d6c2bac8af (patch) | |
| tree | ca6f8a45095a39137003fbe7d2f888da4fa5c43b | |
| parent | ddd34672ee56c61e3b885ca60e03ecbe995e5961 (diff) | |
Correct stack alignment. Clean up flag bit tests. Remove redundent SP assignment. Add TOC register save/restore around function call.
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S index f6ce115077..287597c480 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S @@ -42,18 +42,17 @@ ENTRY (BP_SYM (__clone)) /* Check for child_stack == NULL || fn == NULL. */ cmpdi cr0,r4,0 - ld r0,0(r3) - cmpdi cr1,r0,0 + cmpdi cr1,r3,0 cror cr0*4+eq,cr1*4+eq,cr0*4+eq beq- cr0,L(badargs) /* Set up stack frame for parent. */ - stdu r1,-88(r1) + stdu r1,-80(r1) std r29,56(r1) std r30,64(r1) std r31,72(r1) #ifdef RESET_PID - std r28,80(r1) + std r28,48(r1) #endif /* Set up stack frame for child. */ @@ -85,18 +84,12 @@ ENTRY (BP_SYM (__clone)) crandc cr1*4+eq,cr1*4+eq,cr0*4+so bne- cr1,L(parent) /* The '-' is to minimise the race. */ - /* On at least mklinux DR3a5, clone() doesn't actually change - the stack pointer. I'm pretty sure this is a bug, because - it adds a race condition if a signal is sent to a thread - just after it is created (in the previous three instructions). */ - mr r1,r30 - #ifdef RESET_PID - rldicl. r0,r28,48,63 /* This is & CLONE_THREAD */ - bne+ r0,L(oldpid) - rldicl. r0,r28,56,63 /* This is & CLONE_VM */ + andis. r0,r28,CLONE_THREAD>>16 + bne+ cr0,L(oldpid) + andi. r0,r28,CLONE_VM li r3,-1 - bne- r0,L(nomoregetpid) + bne- cr0,L(nomoregetpid) DO_CALL(SYS_ify(getpid)) L(nomoregetpid): stw r3,TID(r13) @@ -122,12 +115,12 @@ L(oldpid): L(parent): /* Parent. Restore registers & return. */ #ifdef RESET_PID - ld r28,88(r1) + ld r28,48(r1) #endif ld r31,72(r1) ld r30,64(r1) ld r29,56(r1) - addi r1,r1,88 + addi r1,r1,80 bnslr+ b JUMPTARGET(__syscall_error) |