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* sysdeps/unix/sysv/linux/powerpc/socket.S: Adjust asm syntax.
	* sysdeps/unix/sysv/linux/powerpc/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/brk.S: Likewise.
This commit is contained in:
Ulrich Drepper
1999-10-11 23:36:50 +00:00
parent 38a29b57af
commit acf47bbeeb
5 changed files with 59 additions and 56 deletions
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42
sysdeps/unix/sysv/linux/powerpc/clone.S
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@ -1,5 +1,5 @@
/* Wrapper around clone system call.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 1999 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
@ -29,58 +29,58 @@
ENTRY(__clone)
/* Check for child_stack == NULL || fn == NULL. */
cmpwi %cr0,%r4,0
cmpwi %cr1,%r3,0
cmpwi cr0,r4,0
cmpwi cr1,r3,0
cror cr0*4+eq,cr1*4+eq,cr0*4+eq
beq- %cr0,L(badargs)
beq- cr0,L(badargs)
/* Set up stack frame for parent. */
stwu %r1,-32(%r1)
stmw %r29,16(%r1)
stwu r1,-32(r1)
stmw r29,16(r1)
/* Set up stack frame for child. */
clrrwi %r4,%r4,4
li %r0,0
stwu %r0,-16(%r4)
clrrwi r4,r4,4
li r0,0
stwu r0,-16(r4)
/* Save fn, args, stack across syscall. */
mr %r29,%r3 /* Function in r29. */
mr %r30,%r4 /* Stack pointer in r30. */
mr %r31,%r6 /* Argument in r31. */
mr r29,r3 /* Function in r29. */
mr r30,r4 /* Stack pointer in r30. */
mr r31,r6 /* Argument in r31. */
/* 'flags' argument is first parameter to clone syscall. (The other
argument is the stack pointer, already in r4.) */
mr %r3,%r5
mr r3,r5
/* Do the call. */
DO_CALL(SYS_ify(clone))
/* Check for child process. */
cmpwi %cr1,%r3,0
cmpwi cr1,r3,0
crandc cr1*4+eq,cr1*4+eq,cr0*4+so
bne- %cr1,L(parent) /* The '-' is to minimise the race. */
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
mr r1,r30
/* Call procedure. */
mtctr %r29
mr %r3,%r31
mtctr r29
mr r3,r31
bctrl
/* Call _exit with result from procedure. */
b JUMPTARGET(_exit)
L(parent):
/* Parent. Restore registers & return. */
lmw %r29,16(%r1)
addi %r1,%r1,32
lmw r29,16(r1)
addi r1,r1,32
bnslr+
b JUMPTARGET(__syscall_error)
L(badargs):
li %r3,EINVAL
li r3,EINVAL
b JUMPTARGET(__syscall_error)
END (__clone)