diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/vfork.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/vfork.S | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/vfork.S b/sysdeps/unix/sysv/linux/mips/vfork.S index 0913d6b7f9..80c362d6eb 100644 --- a/sysdeps/unix/sysv/linux/mips/vfork.S +++ b/sysdeps/unix/sysv/linux/mips/vfork.S @@ -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) |