lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-29 11:41:21 +03:00
Code Activity

PowerPC: Consolidate NPTL/non versions of vfork

Browse Source
This commit is contained in:
Adhemerval Zanella
2014-05-26 11:41:28 -05:00
parent fdfd175d46
commit 3d1024e8d1
7 changed files with 79 additions and 206 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S
View File

@ -19,6 +19,7 @@
#define _ERRNO_H 1
#include <bits/errno.h>
#include <kernel-features.h>
#include <tcb-offsets.h>
/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
@ -27,9 +28,36 @@
ENTRY (__vfork)
CALL_MCOUNT 0
/* Load the TCB-cached PID value and negates it. If It it is zero
sets it to 0x800000. And then sets its value again on TCB field.
See raise.c for the logic that relies on this value. */
lwz r0,PID(r13)
cmpwi cr0,r0,0
neg r0,r0
bne- cr0,1f
lis r0,0x8000
1: stw r0,PID(r13)
DO_CALL (SYS_ify (vfork))
cmpwi cr1,r3,0
beqlr- 1
/* Restore the original value of the TCB cache of the PID, if we're
the parent. But in the child (syscall return value equals zero),
leave things as they are. */
lwz r0,PID(r13)
clrlwi r4,r0,1
cmpwi cr1,r4,0
beq- cr1,1f
neg r4,r0
1: stw r4,PID(r13)
PSEUDO_RET
PSEUDO_END (__vfork)
libc_hidden_def (__vfork)
weak_alias (__vfork, vfork)
strong_alias (__vfork, __libc_vfork)