/* 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #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. */ \ rsb r0, r3, #0; /* Negate it. */ \ 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/ARM/VFORK.S>
