gdb/testsuite/gdb.arch/arm-disp-step.S

   1 /* Copyright 2010, 2011 Free Software Foundation, Inc.
   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         .syntax unified
  19         .text
  20         .type main,%function
  21 #if defined (__thumb__)
  22         .code   16
  23         .thumb_func
  24 #endif
  25         .globl main
  26 main:
  27         push {r7, lr}
  28         add     sp, sp, #4
  29         mov     r7, sp
  30
  31
  32         /* Test call and return */
  33         .global test_call
  34 test_call:
  35         bl test_call_subr
  36         .global test_ret_end
  37 test_ret_end:
  38         nop                     @ Location test_ret_end
  39
  40         /* Test branch */
  41         bl test_branch
  42
  43         /* Test ldr from pc */
  44         bl test_ldr_pc
  45
  46         /* Test ldm/stm only in ARM mode */
  47 #if !defined (__thumb__)
  48         bl test_ldm_stm_pc
  49 #endif
  50
  51         /* Test ldrX literal in ARM */
  52 #if !defined (__thumb__)
  53         bl test_ldr_literal
  54 #endif
  55
  56         /* Test 32-bit adr in ARM */
  57 #if !defined(__thumb__)
  58         bl test_adr_32bit
  59 #endif
  60
  61 #if !defined(__thumb__)
  62         bl test_pop_pc
  63 #endif
  64
  65         /* Test str in ARM mode and Thumb-2 */
  66 #if !defined(__thumb__)
  67         bl test_str_pc
  68 #endif
  69         /* Return */
  70         mov     sp, r7
  71         sub     sp, sp, #4
  72         movs    r0, #0
  73         pop     {r7, pc}
  74         .size main, .-main
  75
  76         .global test_call_subr
  77 #if defined (__thumb__)
  78         .code   16
  79         .thumb_func
  80 #endif
  81         .type test_call_subr, %function
  82 test_call_subr:
  83         nop
  84         .global test_call_end
  85 test_call_end:
  86         nop                     @ Location test_call_end
  87         .global test_ret
  88 test_ret:
  89         bx lr
  90         .size test_call_subr, .-test_call_subr
  91
  92
  93         .global test_branch
  94 #if defined (__thumb__)
  95         .code   16
  96         .thumb_func
  97 #endif
  98         .type test_branch, %function
  99 test_branch:
 100         b       L_branch
 101         .global
 102 L_branch:
 103         bx lr
 104         .size test_branch, .-test_branch
 105
 106         .global test_ldr_pc
 107 #if defined (__thumb__)
 108         .code   16
 109         .thumb_func
 110 #endif
 111         .type test_ldr_pc, %function
 112 test_ldr_pc:
 113         ldr     r1, [pc, #0]
 114
 115         .global
 116 test_ldr_pc_ret:
 117         bx lr
 118         .size test_ldr_pc, .-test_ldr_pc
 119
 120 #if !defined (__thumb__)
 121         .global test_ldm_stm_pc
 122         .type test_ldm_stm_pc, %function
 123 test_ldm_stm_pc:
 124         stmdb   sp!, {lr, pc}
 125         ldmia   sp!, {r0, r1}
 126         ldr     r0, .L1
 127         stmdb   sp!, {r0}
 128         .global
 129 test_ldm_pc:
 130         ldmia   sp!, {pc}
 131         .global
 132 test_ldm_stm_pc_ret:
 133         bx lr
 134         .align  2
 135 .L1:
 136         .word   test_ldm_stm_pc_ret
 137         .size test_ldm_stm_pc, .-test_ldm_stm_pc
 138 #endif
 139
 140 #if !defined (__thumb__)
 141         .global test_ldr_literal
 142         .type test_ldr_literal, %function
 143 test_ldr_literal:
 144         ldrh    r0, [pc]
 145         .global test_ldrsb_literal
 146 test_ldrsb_literal:
 147         ldrsb   r0, [pc]
 148         .global test_ldrsh_literal
 149 test_ldrsh_literal:
 150         ldrsh   r0, [pc]
 151         .global test_ldr_literal_end
 152 test_ldr_literal_end:
 153         bx lr
 154         .size test_ldr_literal, .-test_ldr_literal
 155 #endif
 156
 157
 158 #if !defined(__thumb__)
 159         .global test_adr_32bit
 160 #if defined(__thumb2__)
 161         .code   16
 162         .thumb_func
 163 #endif
 164 test_adr_32bit:
 165         adr     r0, .L6
 166         nop
 167 .L6:
 168         nop
 169         .global test_adr_32bit_after
 170 test_adr_32bit_after:
 171         adr     r0, .L6
 172
 173         .global test_adr_32bit_end
 174 test_adr_32bit_end:
 175         bx lr
 176         .size test_adr_32bit, .-test_adr_32bit
 177 #endif
 178
 179         .global test_pop_pc
 180         .type test_pop_pc, %function
 181 #if defined(__thumb__)
 182         .code   16
 183         .thumb_func
 184 #endif
 185
 186 test_pop_pc:
 187         ldr     r1, .L5
 188 #if defined(__thumb__)
 189         movs    r0, #1
 190         orrs    r1, r0
 191 #endif
 192         push    {r1}
 193         push    {r1}
 194         .global test_pop_pc_1
 195 test_pop_pc_1:
 196         pop     {r1, pc}
 197         .global test_pop_pc_ret
 198 test_pop_pc_ret:
 199         bx lr
 200         .align  2
 201 .L5:
 202         .word   test_pop_pc_ret
 203         .size test_pop_pc, .-test_pop_pc
 204
 205 #if !defined(__thumb__)
 206 #if defined (__thumb2__)
 207         .code   16
 208         .thumb_func
 209 #endif
 210         .global test_str_pc
 211         .type test_str_pc, %function
 212 test_str_pc:
 213         str     pc, [sp, #-4]
 214         ldr     r0, [sp, #-4]
 215         sub     r0, r0, pc
 216         /* compute offset again without displaced stepping.  */
 217         str     pc, [sp, #-4]
 218         ldr     r1, [sp, #-4]
 219         sub     r1, r1, pc
 220
 221         /* r0 should be equal to r1.  */
 222         cmp     r0, r1
 223         bne     pc_offset_wrong
 224
 225         .global pc_offset_right
 226 pc_offset_right:
 227         b       test_str_pc_end
 228
 229         .global pc_offset_wrong
 230 pc_offset_wrong:
 231         nop
 232
 233         .global test_str_pc_end
 234 test_str_pc_end:
 235         bx lr
 236 #endif