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| author | Ulrich Drepper <drepper@redhat.com> | 2004-12-15 08:11:12 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-12-15 08:11:12 +0000 |
| commit | 917fbe706900299552cfaf34d78ef66d8f128577 (patch) | |
| tree | 9ee82275ad18a8f2d0d57e53be63a81ec979750d /sysdeps | |
| parent | 1f9d7c2739c9442d07c5578920824abb4a3bf509 (diff) | |
| download | glibc-917fbe706900299552cfaf34d78ef66d8f128577.zip glibc-917fbe706900299552cfaf34d78ef66d8f128577.tar.gz glibc-917fbe706900299552cfaf34d78ef66d8f128577.tar.bz2 | |
2004-12-15 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Add support
for pid caching in nptl.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S | 42 |
1 files changed, 35 insertions, 7 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S index 11768bc..891cf83 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S @@ -1,5 +1,5 @@ /* Wrapper around clone system call. - Copyright (C) 1997,98,99,2000,02 Free Software Foundation, Inc. + Copyright (C) 1997,98,99,2000,02,2004 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -24,6 +24,10 @@ #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. */ @@ -44,11 +48,15 @@ ENTRY (BP_SYM (__clone)) beq- cr0,L(badargs) /* Set up stack frame for parent. */ - stwu r1,-32(r1) -#ifndef __ASSUME_FIXED_CLONE_SYSCALL - stmw r29,16(r1) + stwu r1,-36(r1) +#ifdef RESET_PID + stmw r28,16(r1) #else +# ifndef __ASSUME_FIXED_CLONE_SYSCALL + stmw r29,16(r1) +# else stmw r30,16(r1) +# endif #endif /* Set up stack frame for child. */ @@ -61,6 +69,9 @@ ENTRY (BP_SYM (__clone)) #ifndef __ASSUME_FIXED_CLONE_SYSCALL mr r29,r4 /* Stack pointer in r29. */ #endif +#ifdef RESET_PID + mr r28,r5 +#endif mr r31,r6 /* Argument in r31. */ /* 'flags' argument is first parameter to clone syscall. (The other @@ -88,6 +99,19 @@ ENTRY (BP_SYM (__clone)) mr r1,r29 #endif +#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(r2) + stw r3,PID(r2) +L(oldpid): +#endif + /* Call procedure. */ mtctr r30 mr r3,r31 @@ -97,12 +121,16 @@ ENTRY (BP_SYM (__clone)) L(parent): /* Parent. Restore registers & return. */ -#ifndef __ASSUME_FIXED_CLONE_SYSCALL - lmw r29,16(r1) +#ifdef RESET_PID + lmw r28,16(r1) #else +# ifndef __ASSUME_FIXED_CLONE_SYSCALL + lmw r29,16(r1) +# else lmw r30,16(r1) +# endif #endif - addi r1,r1,32 + addi r1,r1,36 bnslr+ b JUMPTARGET(__syscall_error) |