| /* Copyright (C) 2005, 2010 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. */ \ |
| cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (lr, 0); \ |
| 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. */ \ |
| cfi_adjust_cfa_offset (-4); \ |
| cfi_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 "../vfork.S" |
