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2004-12-15  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Add support
	for pid caching in nptl.
This commit is contained in:
Ulrich Drepper 2004-12-15 08:11:12 +00:00
parent 1f9d7c2739
commit 917fbe7069
4 changed files with 47 additions and 7 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2004-12-15 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Add support
for pid caching in nptl.
2004-12-14 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Add support

4
nptl/ChangeLog
View File

@ -1,3 +1,7 @@
2004-12-15 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: New file.
2004-12-14 Ulrich Drepper <drepper@redhat.com>
* sysdeps/powerpc/tcb-offsets.sym: Add TID.

3
nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S Normal file
View File

@ -0,0 +1,3 @@
#define RESET_PID
#include <tcb-offsets.h>
#include <sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S>

42
sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S
View File

@ -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. */
@ -60,6 +68,9 @@ ENTRY (BP_SYM (__clone))
mr r30,r3 /* Function in r30. */
#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. */
@ -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)