gdb/testsuite/gdb.arch/amd64-disp-step.S

   1 /* Copyright 2009-2024 Free Software Foundation, Inc.
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; either version 3 of the License, or
   6    (at your option) any later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16    This file is part of the gdb testsuite.
  17    It tests displaced stepping over various insns that require special
  18    handling.  */
  19
  20         .text
  21
  22         .global main
  23 main:
  24         nop
  25
  26         callq   setup_signal_handler
  27
  28         nop
  29
  30 /***********************************************/
  31
  32 /* test call/ret */
  33
  34         .global test_call
  35 test_call:
  36         call test_call_subr
  37         nop
  38         .global test_ret_end
  39 test_ret_end:
  40         nop
  41
  42 /***********************************************/
  43
  44 /* test abs-jmp/rep-ret */
  45
  46 test_abs_jmp_setup:
  47         mov $test_abs_jmp_return,%rdx
  48         push %rdx
  49         mov $test_abs_jmp_subr,%rdx
  50         .global test_abs_jmp
  51 test_abs_jmp:
  52         jmp *%rdx
  53 test_abs_jmp_return:
  54         nop
  55         .global test_rep_ret_end
  56 test_rep_ret_end:
  57         nop
  58
  59 /***********************************************/
  60
  61 /* test syscall */
  62
  63         .global test_syscall
  64         mov $0x27,%eax /* getpid */
  65 test_syscall:
  66         syscall
  67         nop
  68 test_syscall_end:
  69         nop
  70
  71 /***********************************************/
  72
  73 /* Test stepping over int3.
  74    The prefixes are pointless, but it's possible, so we exercise it.  */
  75
  76         nop
  77         .global test_int3
  78 test_int3:
  79         repz
  80         repz
  81         int3
  82         nop
  83         .global test_int3_end
  84 test_int3_end:
  85         nop
  86
  87 /***********************************************/
  88
  89 /* test rip-relative
  90    GDB picks a spare register to hold the rip-relative address.
  91    Exercise all the possibilities (rax-rdi, sans rsp).  */
  92
  93         .global test_rip_rax
  94 test_rip_rax:
  95         add answer(%rip),%rax
  96         .global test_rip_rax_end
  97 test_rip_rax_end:
  98         nop
  99
 100         .global test_rip_rbx
 101 test_rip_rbx:
 102         add answer(%rip),%rbx
 103         .global test_rip_rbx_end
 104 test_rip_rbx_end:
 105         nop
 106
 107         .global test_rip_rcx
 108 test_rip_rcx:
 109         add answer(%rip),%rcx
 110         .global test_rip_rcx_end
 111 test_rip_rcx_end:
 112         nop
 113
 114         .global test_rip_rdx
 115 test_rip_rdx:
 116         add answer(%rip),%rdx
 117         .global test_rip_rdx_end
 118 test_rip_rdx_end:
 119         nop
 120
 121         .global test_rip_rbp
 122 test_rip_rbp:
 123         add answer(%rip),%rbp
 124         .global test_rip_rbp_end
 125 test_rip_rbp_end:
 126         nop
 127
 128         .global test_rip_rsi
 129 test_rip_rsi:
 130         add answer(%rip),%rsi
 131         .global test_rip_rsi_end
 132 test_rip_rsi_end:
 133         nop
 134
 135         .global test_rip_rdi
 136 test_rip_rdi:
 137         add answer(%rip),%rdi
 138         .global test_rip_rdi_end
 139 test_rip_rdi_end:
 140         nop
 141
 142         .global test_jmp
 143 test_jmp:
 144         jmpq    *jmp_dest(%rip)
 145         nop
 146         .global test_jmp_end
 147 test_jmp_end:
 148         nop
 149
 150         /* skip over test data */
 151         jmp done
 152
 153 /* test rip-relative data */
 154
 155 answer: .8byte 42
 156
 157 jmp_dest:
 158         .8byte  test_jmp_end
 159
 160 /***********************************************/
 161
 162 /* all done */
 163
 164 done:
 165         mov $0,%rdi
 166         call exit
 167         hlt
 168
 169 /***********************************************/
 170
 171 /* subroutine to help test call/ret */
 172
 173 test_call_subr:
 174         nop
 175         .global test_call_end
 176 test_call_end:
 177         nop
 178
 179         .global test_ret
 180 test_ret:
 181         ret
 182
 183 /***********************************************/
 184
 185 /* subroutine to help test abs-jmp/rep-ret */
 186
 187 test_abs_jmp_subr:
 188         nop
 189         .global test_abs_jmp_end
 190 test_abs_jmp_end:
 191         nop
 192
 193         .global test_rep_ret
 194 test_rep_ret:
 195         repz
 196         ret
 197         .section        .note.GNU-stack,"",@progbits