projects / thirdparty / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 29d73ae4 DJ |
1 | /* Unwinder test program. |
| 2 | ||
| 6aba47ca | 3 | Copyright 2006, 2007 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 | |
| 9 | the Free Software Foundation; either version 2 of the License, or | |
| 10 | (at your option) any later version. | |
| 11 | ||
| 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. | |
| 16 | ||
| 17 | You should have received a copy of the GNU General Public License | |
| 18 | along with this program; if not, write to the Free Software | |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 | Boston, MA 02111-1307, USA. */ | |
| 21 | ||
| 22 | void tpcs_frame (void); | |
| 23 | ||
| 24 | int | |
| 25 | main (void) | |
| 26 | { | |
| 27 | tpcs_frame (); | |
| 28 | return 0; | |
| 29 | } | |
| 30 | ||
| 31 | /* Normally Thumb functions use r7 as the frame pointer. However, | |
| fd20f75b DJ |
32 | with the GCC option -mtpcs-frame, they may use fp instead. Make |
| 33 | sure that the prologue analyzer can handle this. */ | |
| 29d73ae4 DJ |
34 | |
| 35 | asm(".text\n" | |
| 36 | " .align 2\n" | |
| 37 | " .thumb_func\n" | |
| 38 | " .code 16\n" | |
| 39 | "tpcs_frame_1:\n" | |
| 40 | " sub sp, #16\n" | |
| 41 | " push {r7}\n" | |
| 42 | " add r7, sp, #20\n" | |
| 43 | " str r7, [sp, #8]\n" | |
| 44 | " mov r7, pc\n" | |
| 45 | " str r7, [sp, #16]\n" | |
| 46 | " mov r7, fp\n" | |
| 47 | " str r7, [sp, #4]\n" | |
| 48 | " mov r7, lr\n" | |
| 49 | " str r7, [sp, #12]\n" | |
| 50 | " add r7, sp, #16\n" | |
| 51 | " mov fp, r7\n" | |
| 52 | " mov r7, sl\n" | |
| 53 | " push {r7}\n" | |
| 54 | ||
| fd20f75b DJ |
55 | /* We'll set a breakpoint at this call. We can't hardcode a trap |
| 56 | instruction; the right instruction to use varies too much. And | |
| 57 | we can't use a global label, because GDB will think that's the | |
| 58 | start of a new function. So, this slightly convoluted | |
| 59 | technique. */ | |
| 60 | ".Ltpcs:\n" | |
| 61 | " nop\n" | |
| 29d73ae4 DJ |
62 | |
| 63 | " pop {r2}\n" | |
| 64 | " mov sl, r2\n" | |
| 65 | " pop {r7}\n" | |
| 66 | " pop {r1, r2}\n" | |
| 67 | " mov fp, r1\n" | |
| 68 | " mov sp, r2\n" | |
| 69 | " bx lr\n" | |
| 70 | ||
| fd20f75b DJ |
71 | " .align 2\n" |
| 72 | " .type tpcs_offset, %object\n" | |
| 73 | "tpcs_offset:\n" | |
| 74 | " .word .Ltpcs - tpcs_frame_1\n" | |
| 75 | ||
| 29d73ae4 DJ |
76 | " .align 2\n" |
| 77 | " .thumb_func\n" | |
| 78 | " .code 16\n" | |
| 79 | "tpcs_frame:\n" | |
| 80 | " sub sp, #16\n" | |
| 81 | " push {r7}\n" | |
| 82 | " add r7, sp, #20\n" | |
| 83 | " str r7, [sp, #8]\n" | |
| 84 | " mov r7, pc\n" | |
| 85 | " str r7, [sp, #16]\n" | |
| 86 | " mov r7, fp\n" | |
| 87 | " str r7, [sp, #4]\n" | |
| 88 | " mov r7, lr\n" | |
| 89 | " str r7, [sp, #12]\n" | |
| 90 | " add r7, sp, #16\n" | |
| 91 | " mov fp, r7\n" | |
| 92 | " mov r7, sl\n" | |
| 93 | " push {r7}\n" | |
| 94 | ||
| fd20f75b | 95 | /* Clobber saved regs around the call. */ |
| 29d73ae4 DJ |
96 | " mov r7, #0\n" |
| 97 | " mov lr, r7\n" | |
| 98 | " bl tpcs_frame_1\n" | |
| 99 | ||
| 100 | " pop {r2}\n" | |
| 101 | " mov sl, r2\n" | |
| 102 | " pop {r7}\n" | |
| fd20f75b | 103 | " pop {r1, r2, r3}\n" |
| 29d73ae4 DJ |
104 | " mov fp, r1\n" |
| 105 | " mov sp, r2\n" | |
| fd20f75b | 106 | " mov lr, r3\n" |
| 29d73ae4 DJ |
107 | " bx lr\n" |
| 108 | ); |