diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/vfork.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/vfork.S | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/vfork.S b/sysdeps/unix/sysv/linux/x86_64/vfork.S index 8332ade9fb..cdd2dea32a 100644 --- a/sysdeps/unix/sysv/linux/x86_64/vfork.S +++ b/sysdeps/unix/sysv/linux/x86_64/vfork.S @@ -34,16 +34,6 @@ ENTRY (__vfork) cfi_adjust_cfa_offset(-8) cfi_register(%rip, %rdi) - /* Save the TCB-cached PID away in %esi, and then negate the TCB - field. But if it's zero, set it to 0x80000000 instead. See - raise.c for the logic that relies on this value. */ - movl %fs:PID, %esi - movl $0x80000000, %ecx - movl %esi, %edx - negl %edx - cmove %ecx, %edx - movl %edx, %fs:PID - /* Stuff the syscall number in RAX and enter into the kernel. */ movl $SYS_ify (vfork), %eax syscall @@ -52,14 +42,6 @@ ENTRY (__vfork) pushq %rdi cfi_adjust_cfa_offset(8) - /* 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. */ - testq %rax, %rax - je 1f - movl %esi, %fs:PID -1: - cmpl $-4095, %eax jae SYSCALL_ERROR_LABEL /* Branch forward if it failed. */ |