diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/aarch64/vfork.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/vfork.S | 19 |
1 files changed, 1 insertions, 18 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/vfork.S b/sysdeps/unix/sysv/linux/aarch64/vfork.S index 577895eeb2..9986fbddf5 100644 --- a/sysdeps/unix/sysv/linux/aarch64/vfork.S +++ b/sysdeps/unix/sysv/linux/aarch64/vfork.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1999-2016 Free Software Foundation, Inc. +/* Copyright (C) 1999-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -27,27 +27,10 @@ ENTRY (__vfork) - /* Save the TCB-cached PID away in w3, 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. */ - mrs x2, tpidr_el0 - sub x2, x2, #PTHREAD_SIZEOF - ldr w3, [x2, #PTHREAD_PID_OFFSET] - mov w1, #0x80000000 - negs w0, w3 - csel w0, w1, w0, eq - str w0, [x2, #PTHREAD_PID_OFFSET] - mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ mov x1, sp DO_CALL (clone, 2) - /* 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. */ - cbz x0, 1f - str w3, [x2, #PTHREAD_PID_OFFSET] -1: cmn x0, #4095 b.cs .Lsyscall_error RET |