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[thirdparty/binutils-gdb.git] / gdb / testsuite / gdb.arch / thumb-prologue.c
1 /* Unwinder test program.
2
3 Copyright 2006, 2007 Free Software Foundation, Inc.
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,
32 with the GCC option -mtpcs-frame, they may use fp instead. */
33
34 asm(".text\n"
35 " .align 2\n"
36 " .thumb_func\n"
37 " .code 16\n"
38 "tpcs_frame_1:\n"
39 " sub sp, #16\n"
40 " push {r7}\n"
41 " add r7, sp, #20\n"
42 " str r7, [sp, #8]\n"
43 " mov r7, pc\n"
44 " str r7, [sp, #16]\n"
45 " mov r7, fp\n"
46 " str r7, [sp, #4]\n"
47 " mov r7, lr\n"
48 " str r7, [sp, #12]\n"
49 " add r7, sp, #16\n"
50 " mov fp, r7\n"
51 " mov r7, sl\n"
52 " push {r7}\n"
53
54 /* Trap. */
55 " .short 0xdffe\n"
56
57 " pop {r2}\n"
58 " mov sl, r2\n"
59 " pop {r7}\n"
60 " pop {r1, r2}\n"
61 " mov fp, r1\n"
62 " mov sp, r2\n"
63 " bx lr\n"
64
65 " .align 2\n"
66 " .thumb_func\n"
67 " .code 16\n"
68 "tpcs_frame:\n"
69 " sub sp, #16\n"
70 " push {r7}\n"
71 " add r7, sp, #20\n"
72 " str r7, [sp, #8]\n"
73 " mov r7, pc\n"
74 " str r7, [sp, #16]\n"
75 " mov r7, fp\n"
76 " str r7, [sp, #4]\n"
77 " mov r7, lr\n"
78 " str r7, [sp, #12]\n"
79 " add r7, sp, #16\n"
80 " mov fp, r7\n"
81 " mov r7, sl\n"
82 " push {r7}\n"
83
84 /* Clobber saved regs. */
85 " mov r7, #0\n"
86 " mov lr, r7\n"
87 " bl tpcs_frame_1\n"
88
89 " pop {r2}\n"
90 " mov sl, r2\n"
91 " pop {r7}\n"
92 " pop {r1, r2}\n"
93 " mov fp, r1\n"
94 " mov sp, r2\n"
95 " bx lr\n"
96 );