| Jeff Brown | 10c8ce5 | 2011-11-18 15:17:07 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| Elliott Hughes | 5c2772f | 2013-03-21 22:15:06 -0700 | [diff] [blame] | 28 | |
| 29 | #include <linux/err.h> |
| 30 | #include <asm/unistd.h> |
| 31 | #include <machine/asm.h> |
| 32 | |
| Jeff Brown | 10c8ce5 | 2011-11-18 15:17:07 -0800 | [diff] [blame] | 33 | /* unlike our auto-generated syscall stubs, this code saves lr |
| 34 | on the stack, as well as a few other registers. this makes |
| 35 | our stack unwinder happy, when we generate debug stack |
| 36 | traces after the C library or other parts of the system |
| 37 | abort due to a fatal runtime error (e.g. detection |
| 38 | of a corrupted malloc heap). |
| 39 | */ |
| 40 | |
| Jeff Brown | 10c8ce5 | 2011-11-18 15:17:07 -0800 | [diff] [blame] | 41 | ENTRY(tgkill) |
| Ben Cheng | 7e6ce1a | 2013-06-10 17:01:41 -0700 | [diff] [blame] | 42 | .save {r4-r7, ip, lr} |
| Jeff Brown | 10c8ce5 | 2011-11-18 15:17:07 -0800 | [diff] [blame] | 43 | stmfd sp!, {r4-r7, ip, lr} |
| 44 | ldr r7, =__NR_tgkill |
| 45 | swi #0 |
| 46 | ldmfd sp!, {r4-r7, ip, lr} |
| Elliott Hughes | 9aceab5 | 2013-03-12 14:57:30 -0700 | [diff] [blame] | 47 | cmn r0, #(MAX_ERRNO + 1) |
| 48 | bxls lr |
| 49 | neg r0, r0 |
| 50 | b __set_errno |
| Jeff Brown | 10c8ce5 | 2011-11-18 15:17:07 -0800 | [diff] [blame] | 51 | END(tgkill) |