projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 29d73ae4 DJ |
1 | /* Unwinder test program. |
| 2 | ||
| 7b6bb8da | 3 | Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
| 29d73ae4 DJ |
4 | |
| 5 | This file is part of GDB. | |
| 6 | ||
| 7 | This program is free software; you can redistribute it and/or modify | |
| 8 | it under the terms of the GNU General Public License as published by | |
| a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
| 29d73ae4 | 10 | (at your option) any later version. |
| a9762ec7 | 11 | |
| 29d73ae4 DJ |
12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | GNU General Public License for more details. | |
| a9762ec7 | 16 | |
| 29d73ae4 | 17 | You should have received a copy of the GNU General Public License |
| a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 29d73ae4 DJ |
19 | |
| 20 | void tpcs_frame (void); | |
| 21 | ||
| 22 | int | |
| 23 | main (void) | |
| 24 | { | |
| 25 | tpcs_frame (); | |
| 26 | return 0; | |
| 27 | } | |
| 28 | ||
| 29 | /* Normally Thumb functions use r7 as the frame pointer. However, | |
| fd20f75b DJ |
30 | with the GCC option -mtpcs-frame, they may use fp instead. Make |
| 31 | sure that the prologue analyzer can handle this. */ | |
| 29d73ae4 DJ |
32 | |
| 33 | asm(".text\n" | |
| 34 | " .align 2\n" | |
| 35 | " .thumb_func\n" | |
| 36 | " .code 16\n" | |
| 37 | "tpcs_frame_1:\n" | |
| 38 | " sub sp, #16\n" | |
| 39 | " push {r7}\n" | |
| 40 | " add r7, sp, #20\n" | |
| 41 | " str r7, [sp, #8]\n" | |
| 42 | " mov r7, pc\n" | |
| 43 | " str r7, [sp, #16]\n" | |
| 44 | " mov r7, fp\n" | |
| 45 | " str r7, [sp, #4]\n" | |
| 46 | " mov r7, lr\n" | |
| 47 | " str r7, [sp, #12]\n" | |
| 48 | " add r7, sp, #16\n" | |
| 49 | " mov fp, r7\n" | |
| 50 | " mov r7, sl\n" | |
| 51 | " push {r7}\n" | |
| 52 | ||
| fd20f75b DJ |
53 | /* We'll set a breakpoint at this call. We can't hardcode a trap |
| 54 | instruction; the right instruction to use varies too much. And | |
| 55 | we can't use a global label, because GDB will think that's the | |
| 56 | start of a new function. So, this slightly convoluted | |
| 57 | technique. */ | |
| 58 | ".Ltpcs:\n" | |
| 59 | " nop\n" | |
| 29d73ae4 DJ |
60 | |
| 61 | " pop {r2}\n" | |
| 62 | " mov sl, r2\n" | |
| 63 | " pop {r7}\n" | |
| 64 | " pop {r1, r2}\n" | |
| 65 | " mov fp, r1\n" | |
| 66 | " mov sp, r2\n" | |
| 67 | " bx lr\n" | |
| 68 | ||
| fd20f75b DJ |
69 | " .align 2\n" |
| 70 | " .type tpcs_offset, %object\n" | |
| 71 | "tpcs_offset:\n" | |
| 72 | " .word .Ltpcs - tpcs_frame_1\n" | |
| 73 | ||
| 29d73ae4 DJ |
74 | " .align 2\n" |
| 75 | " .thumb_func\n" | |
| 76 | " .code 16\n" | |
| 77 | "tpcs_frame:\n" | |
| 78 | " sub sp, #16\n" | |
| 79 | " push {r7}\n" | |
| 80 | " add r7, sp, #20\n" | |
| 81 | " str r7, [sp, #8]\n" | |
| 82 | " mov r7, pc\n" | |
| 83 | " str r7, [sp, #16]\n" | |
| 84 | " mov r7, fp\n" | |
| 85 | " str r7, [sp, #4]\n" | |
| 86 | " mov r7, lr\n" | |
| 87 | " str r7, [sp, #12]\n" | |
| 88 | " add r7, sp, #16\n" | |
| 89 | " mov fp, r7\n" | |
| 90 | " mov r7, sl\n" | |
| 91 | " push {r7}\n" | |
| 92 | ||
| fd20f75b | 93 | /* Clobber saved regs around the call. */ |
| 29d73ae4 DJ |
94 | " mov r7, #0\n" |
| 95 | " mov lr, r7\n" | |
| 96 | " bl tpcs_frame_1\n" | |
| 97 | ||
| 98 | " pop {r2}\n" | |
| 99 | " mov sl, r2\n" | |
| 100 | " pop {r7}\n" | |
| fd20f75b | 101 | " pop {r1, r2, r3}\n" |
| 29d73ae4 DJ |
102 | " mov fp, r1\n" |
| 103 | " mov sp, r2\n" | |
| fd20f75b | 104 | " mov lr, r3\n" |
| 29d73ae4 DJ |
105 | " bx lr\n" |
| 106 | ); |