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

   1 # Copyright 2009-2021 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
  18 # Test amd64 displaced stepping.
  19
  20
  21 if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
  22     verbose "Skipping x86_64 displaced stepping tests."
  23     return
  24 }
  25
  26 set newline "\[\r\n\]*"
  27
  28 set opts {debug nopie}
  29 standard_testfile .S
  30
  31 if { [prepare_for_testing "failed to prepare" $testfile $srcfile $opts] } {
  32     return -1
  33 }
  34
  35 gdb_test "set displaced-stepping on" ""
  36 gdb_test "show displaced-stepping" ".* displaced stepping .* is on.*"
  37
  38 if ![runto_main] then {
  39     fail "can't run to main"
  40     return 0
  41 }
  42
  43 ##########################################
  44
  45 # Test call/ret.
  46
  47 gdb_test "break test_call" \
  48     "Breakpoint.*at.* file .*$srcfile, line.*"
  49 gdb_test "break test_call_end" \
  50     "Breakpoint.*at.* file .*$srcfile, line.*"
  51
  52 gdb_test "break test_ret" \
  53     "Breakpoint.*at.* file .*$srcfile, line.*"
  54 gdb_test "break test_ret_end" \
  55     "Breakpoint.*at.* file .*$srcfile, line.*"
  56
  57 gdb_test "continue" \
  58     "Continuing.*Breakpoint.*, test_call ().*" \
  59     "continue to test_call"
  60 gdb_test "continue" \
  61     "Continuing.*Breakpoint.*, test_call_end ().*" \
  62     "continue to test_call_end"
  63
  64 gdb_test "continue" \
  65     "Continuing.*Breakpoint.*, test_ret ().*" \
  66     "continue to test_ret"
  67 gdb_test "continue" \
  68     "Continuing.*Breakpoint.*, test_ret_end ().*" \
  69     "continue to test_ret_end"
  70
  71 ##########################################
  72
  73 # Test abs-jmp/rep-ret.
  74
  75 gdb_test "break test_abs_jmp" \
  76     "Breakpoint.*at.* file .*$srcfile, line.*"
  77 gdb_test "break test_abs_jmp_end" \
  78     "Breakpoint.*at.* file .*$srcfile, line.*"
  79
  80 gdb_test "break test_rep_ret" \
  81     "Breakpoint.*at.* file .*$srcfile, line.*"
  82 gdb_test "break test_rep_ret_end" \
  83     "Breakpoint.*at.* file .*$srcfile, line.*"
  84
  85 gdb_test "continue" \
  86     "Continuing.*Breakpoint.*, test_abs_jmp ().*" \
  87     "continue to test_abs_jmp"
  88 gdb_test "continue" \
  89     "Continuing.*Breakpoint.*, test_abs_jmp_end ().*" \
  90     "continue to test_abs_jmp_end"
  91
  92 gdb_test "continue" \
  93     "Continuing.*Breakpoint.*, test_rep_ret ().*" \
  94     "continue to test_rep_ret"
  95 gdb_test "continue" \
  96     "Continuing.*Breakpoint.*, test_rep_ret_end ().*" \
  97     "continue to test_rep_ret_end"
  98
  99 ##########################################
 100
 101 # Test syscall.
 102
 103 gdb_test "break test_syscall" \
 104     "Breakpoint.*at.* file .*$srcfile, line.*"
 105 gdb_test "break test_syscall_end" \
 106     "Breakpoint.*at.* file .*$srcfile, line.*"
 107
 108 gdb_test "continue" \
 109     "Continuing.*Breakpoint.*, test_syscall ().*" \
 110     "continue to test_syscall"
 111 gdb_test "continue" \
 112     "Continuing.*Breakpoint.*, test_syscall_end ().*" \
 113     "continue to test_syscall_end"
 114
 115 ##########################################
 116
 117 # int3 (with prefixes)
 118 # These don't occur in normal code, but gdb should still DTRT.
 119
 120 gdb_test "break test_int3" \
 121     "Breakpoint.*at.* file .*$srcfile, line.*"
 122 gdb_test "break test_int3_end" \
 123     "Breakpoint.*at.* file .*$srcfile, line.*"
 124
 125 gdb_test "continue" \
 126     "Continuing.*Breakpoint.*, test_int3 ().*" \
 127     "continue to test_int3"
 128
 129 gdb_test "continue" \
 130     "Continuing.*Breakpoint.*, test_int3_end ().*" \
 131     "continue to test_int3_end"
 132
 133 ##########################################
 134
 135 # Test rip-relative.
 136 # GDB picks a spare register to hold the rip-relative address.
 137 # Exercise all the possibilities (rax-rdi, sans rsp).
 138
 139 # The order must much the order in srcfile.
 140 set rip_regs { "rax" "rbx" "rcx" "rdx" "rbp" "rsi" "rdi" }
 141
 142 # Assign val to all specified regs.
 143
 144 proc set_regs { regs val } {
 145     global gdb_prompt
 146
 147     foreach reg ${regs} {
 148         # Use send_gdb/gdb_expect so that these aren't logged as pass/fail.
 149         send_gdb "set \$${reg} = ${val}\n"
 150         gdb_expect 10 {
 151             -re "$gdb_prompt $" {
 152                 verbose "Setting ${reg} to ${val}." 2
 153             }
 154             timeout {
 155                 warning "Couldn't set ${reg} to ${val}."
 156             }
 157         }
 158     }
 159 }
 160
 161 # Verify all REGS equal VAL, except REG which equals REG_VAL.
 162
 163 proc verify_regs { test_name regs val except_reg except_reg_val } {
 164     global newline
 165
 166     foreach reg ${regs} {
 167         set expected ${val}
 168         if { "${reg}" == "${except_reg}" } {
 169             set expected ${except_reg_val}
 170         }
 171         # The cast to (int) is because RBP is printed as a pointer.
 172         gdb_test "p (int) \$${reg}" " = ${expected}${newline}" "${test_name} ${reg} expected value"
 173     }
 174 }
 175
 176 proc rip_test { reg } {
 177     global srcfile rip_regs
 178
 179     set test_start_label "test_rip_${reg}"
 180     set test_end_label "test_rip_${reg}_end"
 181
 182     gdb_test "break ${test_start_label}" \
 183         "Breakpoint.*at.* file .*$srcfile, line.*"
 184     gdb_test "break ${test_end_label}" \
 185         "Breakpoint.*at.* file .*$srcfile, line.*"
 186
 187     gdb_test "continue" \
 188         "Continuing.*Breakpoint.*, ${test_start_label} ().*" \
 189         "continue to ${test_start_label}"
 190
 191     set_regs ${rip_regs} 0
 192
 193     gdb_test "continue" \
 194         "Continuing.*Breakpoint.*, ${test_end_label} ().*" \
 195         "continue to ${test_end_label}"
 196
 197     verify_regs "test rip w/${reg}" ${rip_regs} 0 ${reg} 42
 198 }
 199
 200 foreach reg ${rip_regs} {
 201     rip_test $reg
 202 }
 203
 204 ##########################################
 205
 206 # Done, run program to exit.
 207
 208 gdb_continue_to_end "amd64-disp-step"