diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2003-07-14 21:16:43 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2003-07-14 21:16:43 +0000 |
| commit | b1b060c341b112e5face9a074e95fd366e8539bf (patch) | |
| tree | 99e29cac2b00f4957a60f888c4c5605c59beb516 /sysdeps/unix/sysv/linux/powerpc | |
| parent | 9291eb491f78ddea7d908a58a2b2ce68c63f31ba (diff) | |
Update.
2003-07-14 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/kernel-features.h: Define
__ASSUME_TGKILL for Alpha appropriately.
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S index 3bfd025984..11768bcbb7 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S @@ -20,6 +20,7 @@ #include <sysdep.h> #define _ERRNO_H 1 #include <bits/errno.h> +#include <kernel-features.h> #include <bp-sym.h> #include <bp-asm.h> @@ -44,7 +45,11 @@ ENTRY (BP_SYM (__clone)) /* Set up stack frame for parent. */ stwu r1,-32(r1) +#ifndef __ASSUME_FIXED_CLONE_SYSCALL stmw r29,16(r1) +#else + stmw r30,16(r1) +#endif /* Set up stack frame for child. */ clrrwi r4,r4,4 @@ -52,8 +57,10 @@ ENTRY (BP_SYM (__clone)) stwu r0,-16(r4) /* Save fn, args, stack across syscall. */ - mr r29,r3 /* Function in r29. */ - mr r30,r4 /* Stack pointer in r30. */ + mr r30,r3 /* Function in r30. */ +#ifndef __ASSUME_FIXED_CLONE_SYSCALL + mr r29,r4 /* Stack pointer in r29. */ +#endif mr r31,r6 /* Argument in r31. */ /* 'flags' argument is first parameter to clone syscall. (The other @@ -73,13 +80,16 @@ ENTRY (BP_SYM (__clone)) crandc cr1*4+eq,cr1*4+eq,cr0*4+so bne- cr1,L(parent) /* The '-' is to minimise the race. */ +#ifndef __ASSUME_FIXED_CLONE_SYSCALL /* 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 + mr r1,r29 +#endif + /* Call procedure. */ - mtctr r29 + mtctr r30 mr r3,r31 bctrl /* Call _exit with result from procedure. */ @@ -87,7 +97,11 @@ ENTRY (BP_SYM (__clone)) L(parent): /* Parent. Restore registers & return. */ +#ifndef __ASSUME_FIXED_CLONE_SYSCALL lmw r29,16(r1) +#else + lmw r30,16(r1) +#endif addi r1,r1,32 bnslr+ b JUMPTARGET(__syscall_error) |