projects / thirdparty / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 1d506c26 | 1 | /* Copyright 2018-2024 Free Software Foundation, Inc. |
| f5d420bb SM |
2 | |
| 3 | This file is part of GDB. | |
| 4 | ||
| 5 | This program is free software; you can redistribute it and/or modify | |
| 6 | it under the terms of the GNU General Public License as published by | |
| 7 | the Free Software Foundation; either version 3 of the License, or | |
| 8 | (at your option) any later version. | |
| 9 | ||
| 10 | This program is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | GNU General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU General Public License | |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 17 | ||
| 18 | /* The difference between this and arm-pseudo-unwind is that here, the CFI | |
| 19 | directives use the obsolete DWARF number for the s16 register (a | |
| 20 | pseudo-register in GDB), whereas arm-pseudo-unwind uses the number for the d8 | |
| 21 | register (the underlying raw register for s16). */ | |
| 22 | ||
| 23 | .section .note.GNU-stack,"",%progbits | |
| 24 | ||
| 25 | .data | |
| 26 | value_callee: | |
| 27 | .quad 0x20212223 | |
| 28 | value_caller: | |
| 29 | .quad 0x10111213 | |
| 30 | ||
| 31 | .text | |
| 32 | .arm | |
| 33 | .global callee | |
| 34 | callee: | |
| 35 | .cfi_startproc | |
| 36 | /* Standard prologue. */ | |
| 37 | push {fp, lr} | |
| 38 | .cfi_def_cfa fp, 4 | |
| 39 | .cfi_offset fp, -8 | |
| 40 | .cfi_offset lr, -4 | |
| 41 | add fp, sp, #4 | |
| 42 | ||
| 43 | /* Save caller's s16 value on the stack. */ | |
| 44 | .cfi_offset 80, -12 | |
| 45 | vpush {s16} | |
| 46 | ||
| 47 | /* Put our own s16 value. */ | |
| 48 | ldr r0, =value_callee | |
| 49 | vldr s16, [r0] | |
| 50 | break_here_asm: | |
| 51 | ||
| 52 | /* Restore caller's s16 value. */ | |
| 53 | vpop {s16} | |
| 54 | ||
| 55 | /* Standard epilogue. */ | |
| 56 | pop {fp, pc} | |
| 57 | .cfi_endproc | |
| 58 | ||
| 59 | ||
| 60 | .global caller | |
| 61 | caller: | |
| 62 | .cfi_startproc | |
| 63 | /* Standard prologue. */ | |
| 64 | push {fp, lr} | |
| 65 | .cfi_def_cfa fp, 4 | |
| 66 | .cfi_offset fp, -8 | |
| 67 | .cfi_offset lr, -4 | |
| 68 | add fp, sp, #4 | |
| 69 | ||
| 70 | /* Put our own s16 value. */ | |
| 71 | ldr r0, =value_caller | |
| 72 | vldr s16, [r0] | |
| 73 | ||
| 74 | /* Call callee. */ | |
| 75 | bl callee | |
| 76 | ||
| 77 | /* Store our s16 value in r0-r1 to return it. */ | |
| 78 | vpush {s16} | |
| 79 | pop {r0} | |
| 80 | mov r1, #0 | |
| 81 | ||
| 82 | /* Standard epilogue. */ | |
| 83 | pop {fp, pc} | |
| 84 | .cfi_endproc |