1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
|
/* Copyright 2010-2016 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
.syntax unified
.text
.type main,%function
#if defined (__thumb__)
.code 16
.thumb_func
#endif
.globl main
main:
push {r7, lr}
add sp, sp, #4
mov r7, sp
/* Test call and return */
.global test_call
test_call:
bl test_call_subr
.global test_ret_end
test_ret_end:
nop @ Location test_ret_end
/* Test branch */
bl test_branch
/* Test ldr from pc */
bl test_ldr_pc
/* Test ldm/stm only in ARM mode */
#if !defined (__thumb__)
bl test_ldm_stm_pc
#endif
/* Test ldrX literal in ARM and Thumb-2 */
#if !defined (__thumb__) || defined(__thumb2__)
bl test_ldr_literal
#endif
/* Test ldr literal in Thumb */
#if defined(__thumb__)
bl test_ldr_literal_16
#endif
/* Test cbnz/cbz in Thumb-2 */
#if defined(__thumb2__)
bl test_cbz_cbnz
#endif
/* Test adr in Thumb and Thumb-2 */
#if defined(__thumb__)
bl test_adr
#endif
/* Test 32-bit adr in ARM and Thumb-2 */
#if defined(__thumb2__) || !defined(__thumb__)
bl test_adr_32bit
#endif
bl test_pop_pc
/* Test str in ARM mode and Thumb-2 */
#if !defined(__thumb__)
bl test_str_pc
#endif
/* Test add with pc in Thumb and Thumb-2 */
#if defined(__thumb__)
bl test_add_rn_pc
#endif
/* Return */
mov sp, r7
sub sp, sp, #4
movs r0, #0
pop {r7, pc}
.size main, .-main
.global test_call_subr
#if defined (__thumb__)
.code 16
.thumb_func
#endif
.type test_call_subr, %function
test_call_subr:
nop
.global test_call_end
test_call_end:
nop @ Location test_call_end
.global test_ret
test_ret:
bx lr
.size test_call_subr, .-test_call_subr
.global test_branch
#if defined (__thumb__)
.code 16
.thumb_func
#endif
.type test_branch, %function
test_branch:
b L_branch
.global L_branch
L_branch:
bx lr
.size test_branch, .-test_branch
.global test_ldr_pc
#if defined (__thumb__)
.code 16
.thumb_func
#endif
.type test_ldr_pc, %function
test_ldr_pc:
ldr r1, [pc, #0]
.global test_ldr_pc_ret
test_ldr_pc_ret:
bx lr
.size test_ldr_pc, .-test_ldr_pc
#if !defined (__thumb__)
.global test_ldm_stm_pc
.type test_ldm_stm_pc, %function
test_ldm_stm_pc:
stmdb sp!, {lr, pc}
ldmia sp!, {r0, r1}
ldr r0, .L1
stmdb sp!, {r0}
.global test_ldm_pc
test_ldm_pc:
ldmia sp!, {pc}
.global test_ldm_stm_pc_ret
test_ldm_stm_pc_ret:
bx lr
.align 2
.L1:
.word test_ldm_stm_pc_ret
.size test_ldm_stm_pc, .-test_ldm_stm_pc
#endif
#if !defined (__thumb__) || defined(__thumb2__)
.global test_ldr_literal
.type test_ldr_literal, %function
test_ldr_literal:
ldrh r0, [pc]
.global test_ldrsb_literal
test_ldrsb_literal:
ldrsb r0, [pc]
.global test_ldrsh_literal
test_ldrsh_literal:
ldrsh r0, [pc]
.global test_ldr_literal_end
test_ldr_literal_end:
bx lr
.size test_ldr_literal, .-test_ldr_literal
#endif
#if defined(__thumb__)
.global test_ldr_literal_16
.code 16
.thumb_func
test_ldr_literal_16:
ldr r0, .L2
.global test_ldr_literal_16_end
test_ldr_literal_16_end:
bx lr
.align 2
.L2:
.word test_ldr_literal_16
.size test_ldr_literal_16, .-test_ldr_literal_16
#endif
#if defined(__thumb2__)
.global test_cbz_cbnz
.code 16
.thumb_func
test_cbz_cbnz:
movs r0, #0
.global test_zero_cbnz
test_zero_cbnz:
cbnz r0, .L3
.global test_zero_cbz
test_zero_cbz:
cbz r0, .L3
.L3:
movs r0, #1
.global test_non_zero_cbz
test_non_zero_cbz:
cbz r0, .L4
.global test_non_zero_cbnz
test_non_zero_cbnz:
cbnz r0, .L4
nop
.L4:
.global test_cbz_cbnz_end
test_cbz_cbnz_end:
bx lr
.size test_cbz_cbnz, .-test_cbz_cbnz
#endif
#if defined(__thumb__)
.global test_adr
.code 16
.thumb_func
test_adr:
adr r0, .L8
nop
nop
nop
.L8:
.global test_adr_end
test_adr_end:
bx lr
.size test_adr, .-test_adr
#endif
#if defined(__thumb2__) || !defined(__thumb__)
.global test_adr_32bit
#if defined(__thumb2__)
.code 16
.thumb_func
#endif
test_adr_32bit:
adr r0, .L6
nop
.L6:
nop
.global test_adr_32bit_after
test_adr_32bit_after:
adr r0, .L6
.global test_adr_32bit_end
test_adr_32bit_end:
bx lr
.size test_adr_32bit, .-test_adr_32bit
#endif
.global test_pop_pc
.type test_pop_pc, %function
#if defined(__thumb__)
.code 16
.thumb_func
#endif
test_pop_pc:
ldr r1, .L1_right
ldr r2, .L1_wrong
#if defined(__thumb__)
movs r0, #1
orrs r1, r0
orrs r2, r0
#endif
push {r1}
push {r2}
.global test_pop_pc_1
test_pop_pc_1:
pop {r1, pc}
test_pop_pc_2_start:
ldr r1, .L2_right
#if defined(__thumb__)
movs r0, #1
orrs r1, r0
#endif
push {r1}
.global test_pop_pc_2
test_pop_pc_2:
pop {pc}
/* Test pop instruction with full register list. */
test_pop_pc_3_start:
ldr r1, .L3_right
ldr r2, .L3_wrong
#if defined(__thumb__)
movs r0, #1
orrs r1, r0
orrs r2, r0
#endif
push {r7}
push {r1} /* Push the right address so that PC will get it. */
/* Push the wrong address so r0-r7 will get the wrong a ddress. If PC
is set from any of them, we can get a FAIL. */
push {r2}
push {r2}
push {r2}
push {r2}
push {r2}
push {r2}
push {r2}
push {r2}
test_pop_pc_3:
pop {r0,r1,r2,r3,r4,r5,r6,r7,pc}
.global test_pop_pc_ret
test_pop_pc_ret:
pop {r7}
bx lr
.global test_pop_pc_1_right
test_pop_pc_1_right:
b test_pop_pc_2_start /* right */
.global test_pop_pc_1_wrong
test_pop_pc_1_wrong:
b test_pop_pc_2_start /* wrong */
.global test_pop_pc_2_right
test_pop_pc_2_right:
b test_pop_pc_3_start /* right */
.global test_pop_pc_2_wrong
test_pop_pc_2_wrong:
b test_pop_pc_3_start /* wrong */
.global test_pop_pc_3_right
test_pop_pc_3_right:
b test_pop_pc_ret /* right */
.global test_pop_pc_3_wrong
test_pop_pc_3_wrong:
b test_pop_pc_ret /* wrong */
.align 2
.L1_right:
.word test_pop_pc_1_right
.L1_wrong:
.word test_pop_pc_1_wrong
.L2_right:
.word test_pop_pc_2_right
.L2_wrong:
.word test_pop_pc_2_wrong
.L3_right:
.word test_pop_pc_3_right
.L3_wrong:
.word test_pop_pc_3_wrong
.size test_pop_pc, .-test_pop_pc
#if !defined(__thumb__)
#if defined (__thumb2__)
.code 16
.thumb_func
#endif
.global test_str_pc
.type test_str_pc, %function
test_str_pc:
str pc, [sp, #-4]
ldr r0, [sp, #-4]
sub r0, r0, pc
/* compute offset again without displaced stepping. */
str pc, [sp, #-4]
ldr r1, [sp, #-4]
sub r1, r1, pc
/* r0 should be equal to r1. */
cmp r0, r1
bne pc_offset_wrong
.global pc_offset_right
pc_offset_right:
b test_str_pc_end
.global pc_offset_wrong
pc_offset_wrong:
nop
.global test_str_pc_end
test_str_pc_end:
bx lr
#endif
#if defined(__thumb__)
.global test_add_rn_pc
.code 16
.thumb_func
test_add_rn_pc:
mov r3, 4
test_add_rn_pc_start:
add r3, pc
.global test_add_rn_pc_end
test_add_rn_pc_end:
bx lr
.size test_add_rn_pc, .-test_add_rn_pc
#endif
|
