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MIPS: Consolidate NPTL/non versions of vfork

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This commit is contained in:
Roland McGrath
2014-06-27 09:58:51 -07:00
parent 6f12d0629f
commit 58eb0862c3
5 changed files with 27 additions and 87 deletions
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28
sysdeps/unix/sysv/linux/mips/vfork.S
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@ -21,14 +21,7 @@
#include <sysdep.h>
#include <asm/unistd.h>
#include <sgidefs.h>
#ifndef SAVE_PID
#define SAVE_PID
#endif
#ifndef RESTORE_PID
#define RESTORE_PID
#endif
#include <tls.h>
/* int vfork() */
@ -67,7 +60,13 @@ NESTED(__vfork,FRAMESZ,sp)
PTR_ADDU sp, FRAMESZ
cfi_adjust_cfa_offset (-FRAMESZ)
SAVE_PID
/* Save the PID value. */
READ_THREAD_POINTER(v1) /* Get the thread pointer. */
lw a2, PID_OFFSET(v1) /* Load the saved PID. */
subu a2, $0, a2 /* Negate it. */
bnez a2, 1f /* If it was zero... */
lui a2, 0x8000 /* use 0x80000000 instead. */
1: sw a2, PID_OFFSET(v1) /* Store the temporary PID. */
li a0, 0x4112 /* CLONE_VM | CLONE_VFORK | SIGCHLD */
move a1, sp
@ -76,7 +75,16 @@ NESTED(__vfork,FRAMESZ,sp)
li v0,__NR_clone
syscall
RESTORE_PID
/* Restore the old PID value in the parent. */
beqz v0, 1f /* If we are the parent... */
READ_THREAD_POINTER(v1) /* Get the thread pointer. */
lw a2, PID_OFFSET(v1) /* Load the saved PID. */
subu a2, $0, a2 /* Re-negate it. */
lui a0, 0x8000 /* Load 0x80000000... */
bne a2, a0, 2f /* ... compare against it... */
li a2, 0 /* ... use 0 instead. */
2: sw a2, PID_OFFSET(v1) /* Restore the PID. */
1:
cfi_remember_state
bnez a3,L(error)