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authorUlrich Drepper <drepper@redhat.com>2004-12-15 07:04:50 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-15 07:04:50 +0000
commit1f9d7c2739c9442d07c5578920824abb4a3bf509 (patch)
tree6f29ac8743a35132ab5f43b9675bca8bc17ee215 /sysdeps/unix/sysv/linux
parent8a3f5844c508a67f4fe291236ca7dd73b3d71699 (diff)
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Update.
2004-12-14 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Add support for pid caching in nptl.
Diffstat (limited to 'sysdeps/unix/sysv/linux')
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S30
1 files changed, 28 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S
index 71e9a84e60..be069c90c8 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S
@@ -23,6 +23,9 @@
#include <bp-sym.h>
#include <bp-asm.h>
+#define CLONE_VM 0x00000100
+#define CLONE_THREAD 0x00010000
+
/* This is the only really unusual system call in PPC linux, but not
because of any weirdness in the system call itself; because of
all the freaky stuff we have to do to make the call useful. */
@@ -45,10 +48,13 @@ ENTRY (BP_SYM (__clone))
beq- cr0,L(badargs)
/* Set up stack frame for parent. */
- stdu r1,-80(r1)
+ stdu r1,-88(r1)
std r29,56(r1)
std r30,64(r1)
std r31,72(r1)
+#ifdef RESET_PID
+ std r28,80(r1)
+#endif
/* Set up stack frame for child. */
clrrdi r4,r4,4
@@ -58,6 +64,9 @@ ENTRY (BP_SYM (__clone))
/* Save fn, args, stack across syscall. */
mr r29,r3 /* Function in r29. */
mr r30,r4 /* Stack pointer in r30. */
+#ifdef RESET_PID
+ mr r28,r5 /* Flags in r28. */
+#endif
mr r31,r6 /* Argument in r31. */
/* 'flags' argument is first parameter to clone syscall. (The other
@@ -81,6 +90,20 @@ ENTRY (BP_SYM (__clone))
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
+ andis. r0,r28,1 /* This is & CLONE_THREAD */
+ bne+ r0,L(oldpid)
+ andi. r0,r28,CLONE_VM
+ li r3,-1
+ bne- r0,L(nomoregetpid)
+ DO_CALL(SYS_ify(getpid))
+L(nomoregetpid):
+ stw r3,TID(r13)
+ stw r3,PID(r13)
+L(oldpid):
+#endif
+
/* Call procedure. */
ld r0,0(r29)
ld r2,8(r29)
@@ -96,10 +119,13 @@ ENTRY (BP_SYM (__clone))
L(parent):
/* Parent. Restore registers & return. */
+#ifdef RESET_PID
+ ld r28,88(r1)
+#endif
ld r31,72(r1)
ld r30,64(r1)
ld r29,56(r1)
- addi r1,r1,80
+ addi r1,r1,88
bnslr+
b JUMPTARGET(__syscall_error)