1 /* Copyright (C) 2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #include <tcb-offsets.h>
20 /* Save the PID value. */
22 str lr, [sp, #-4]!; /* Save LR. */ \
23 mov r0, #0xffff0fff; /* Point to the high page. */ \
24 mov lr, pc; /* Save our return address. */ \
25 sub pc, r0, #31; /* Jump to the TLS entry. */ \
26 ldr lr, [sp], #4; /* Restore LR. */ \
27 mov r2, r0; /* Save the TLS addr in r2. */ \
28 ldr r3, [r2, #PID_OFFSET]; /* Load the saved PID. */ \
29 rsb r0, r3, #0; /* Negate it. */ \
30 str r0, [r2, #PID_OFFSET] /* Store the temporary PID. */
32 /* Restore the old PID value in the parent. */
34 cmp r0, #0; /* If we are the parent... */ \
35 strne r3, [r2, #PID_OFFSET] /* ... restore the saved PID. */
37 #include "../../../../../../../libc/sysdeps/linux/arm/vfork.S"