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/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <tcb-offsets.h>
/* Save the PID value. */
#define SAVE_PID \
str lr, [sp, #-4]!; /* Save LR. */ \
mov r0, #0xffff0fff; /* Point to the high page. */ \
mov lr, pc; /* Save our return address. */ \
sub pc, r0, #31; /* Jump to the TLS entry. */ \
ldr lr, [sp], #4; /* Restore LR. */ \
mov r2, r0; /* Save the TLS addr in r2. */ \
ldr r3, [r2, #PID_OFFSET]; /* Load the saved PID. */ \
rsbs r0, r3, #0; /* Negate it. */ \
moveq r0, #0x80000000; /* Use 0x80000000 if it was 0. */ \
str r0, [r2, #PID_OFFSET] /* Store the temporary PID. */
/* Restore the old PID value in the parent. */
#define RESTORE_PID \
cmp r0, #0; /* If we are the parent... */ \
strne r3, [r2, #PID_OFFSET] /* ... restore the saved PID. */
#include "../../../../../../../libc/sysdeps/linux/nios2/vfork.S"
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