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

   1 # Copyright 2009-2022 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 $opts] } {
  32     return -1
  33 }
  34
  35 gdb_test "set displaced-stepping on" ""
  36 gdb_test "show displaced-stepping" ".* displaced stepping .* is on.*"
  37
  38 if {![runto_main]} {
  39     return 0
  40 }
  41
  42 ##########################################
  43
  44 # Test call/ret.
  45
  46 gdb_test "break test_call" \
  47     "Breakpoint.*at.* file .*$srcfile, line.*"
  48 gdb_test "break test_call_end" \
  49     "Breakpoint.*at.* file .*$srcfile, line.*"
  50
  51 gdb_test "break test_ret" \
  52     "Breakpoint.*at.* file .*$srcfile, line.*"
  53 gdb_test "break test_ret_end" \
  54     "Breakpoint.*at.* file .*$srcfile, line.*"
  55
  56 gdb_test "continue" \
  57     "Continuing.*Breakpoint.*, test_call ().*" \
  58     "continue to test_call"
  59 gdb_test "continue" \
  60     "Continuing.*Breakpoint.*, test_call_end ().*" \
  61     "continue to test_call_end"
  62
  63 gdb_test "continue" \
  64     "Continuing.*Breakpoint.*, test_ret ().*" \
  65     "continue to test_ret"
  66 gdb_test "continue" \
  67     "Continuing.*Breakpoint.*, test_ret_end ().*" \
  68     "continue to test_ret_end"
  69
  70 ##########################################
  71
  72 # Test abs-jmp/rep-ret.
  73
  74 gdb_test "break test_abs_jmp" \
  75     "Breakpoint.*at.* file .*$srcfile, line.*"
  76 gdb_test "break test_abs_jmp_end" \
  77     "Breakpoint.*at.* file .*$srcfile, line.*"
  78
  79 gdb_test "break test_rep_ret" \
  80     "Breakpoint.*at.* file .*$srcfile, line.*"
  81 gdb_test "break test_rep_ret_end" \
  82     "Breakpoint.*at.* file .*$srcfile, line.*"
  83
  84 gdb_test "continue" \
  85     "Continuing.*Breakpoint.*, test_abs_jmp ().*" \
  86     "continue to test_abs_jmp"
  87 gdb_test "continue" \
  88     "Continuing.*Breakpoint.*, test_abs_jmp_end ().*" \
  89     "continue to test_abs_jmp_end"
  90
  91 gdb_test "continue" \
  92     "Continuing.*Breakpoint.*, test_rep_ret ().*" \
  93     "continue to test_rep_ret"
  94 gdb_test "continue" \
  95     "Continuing.*Breakpoint.*, test_rep_ret_end ().*" \
  96     "continue to test_rep_ret_end"
  97
  98 ##########################################
  99
 100 # Test syscall.
 101
 102 gdb_test "break test_syscall" \
 103     "Breakpoint.*at.* file .*$srcfile, line.*"
 104 gdb_test "break test_syscall_end" \
 105     "Breakpoint.*at.* file .*$srcfile, line.*"
 106
 107 gdb_test "continue" \
 108     "Continuing.*Breakpoint.*, test_syscall ().*" \
 109     "continue to test_syscall"
 110 gdb_test "continue" \
 111     "Continuing.*Breakpoint.*, test_syscall_end ().*" \
 112     "continue to test_syscall_end"
 113
 114 ##########################################
 115
 116 # int3 (with prefixes)
 117 # These don't occur in normal code, but gdb should still DTRT.
 118
 119 gdb_test "break test_int3" \
 120     "Breakpoint.*at.* file .*$srcfile, line.*"
 121 gdb_test "break test_int3_end" \
 122     "Breakpoint.*at.* file .*$srcfile, line.*"
 123
 124 gdb_test "continue" \
 125     "Continuing.*Breakpoint.*, test_int3 ().*" \
 126     "continue to test_int3"
 127
 128 gdb_test "continue" \
 129     "Continuing.*Breakpoint.*, test_int3_end ().*" \
 130     "continue to test_int3_end"
 131
 132 ##########################################
 133
 134 # Test rip-relative.
 135 # GDB picks a spare register to hold the rip-relative address.
 136 # Exercise all the possibilities (rax-rdi, sans rsp).
 137
 138 # The order must much the order in srcfile.
 139 set rip_regs { "rax" "rbx" "rcx" "rdx" "rbp" "rsi" "rdi" }
 140
 141 # Assign val to all specified regs.
 142
 143 proc set_regs { regs val } {
 144     global gdb_prompt
 145
 146     foreach reg ${regs} {
 147         # Use send_gdb/gdb_expect so that these aren't logged as pass/fail.
 148         send_gdb "set \$${reg} = ${val}\n"
 149         gdb_expect 10 {
 150             -re "$gdb_prompt $" {
 151                 verbose "Setting ${reg} to ${val}." 2
 152             }
 153             timeout {
 154                 warning "Couldn't set ${reg} to ${val}."
 155             }
 156         }
 157     }
 158 }
 159
 160 # Verify all REGS equal VAL, except REG which equals REG_VAL.
 161
 162 proc verify_regs { test_name regs val except_reg except_reg_val } {
 163     global newline
 164
 165     foreach reg ${regs} {
 166         set expected ${val}
 167         if { "${reg}" == "${except_reg}" } {
 168             set expected ${except_reg_val}
 169         }
 170         # The cast to (int) is because RBP is printed as a pointer.
 171         gdb_test "p (int) \$${reg}" " = ${expected}${newline}" "${test_name} ${reg} expected value"
 172     }
 173 }
 174
 175 proc rip_test { reg } {
 176     global srcfile rip_regs
 177
 178     set test_start_label "test_rip_${reg}"
 179     set test_end_label "test_rip_${reg}_end"
 180
 181     gdb_test "break ${test_start_label}" \
 182         "Breakpoint.*at.* file .*$srcfile, line.*"
 183     gdb_test "break ${test_end_label}" \
 184         "Breakpoint.*at.* file .*$srcfile, line.*"
 185
 186     gdb_test "continue" \
 187         "Continuing.*Breakpoint.*, ${test_start_label} ().*" \
 188         "continue to ${test_start_label}"
 189
 190     set_regs ${rip_regs} 0
 191
 192     gdb_test "continue" \
 193         "Continuing.*Breakpoint.*, ${test_end_label} ().*" \
 194         "continue to ${test_end_label}"
 195
 196     verify_regs "test rip w/${reg}" ${rip_regs} 0 ${reg} 42
 197 }
 198
 199 foreach reg ${rip_regs} {
 200     rip_test $reg
 201 }
 202
 203 ##########################################
 204
 205 # Done, run program to exit.
 206
 207 gdb_continue_to_end "amd64-disp-step"