gdb/testsuite/gdb.arch/i386-prologue.exp

   1 # Copyright (C) 2003-2020 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 # Please email any bugs, comments, and/or additions to this file to:
  17 # bug-gdb@gnu.org
  18
  19 # This file is part of the gdb testsuite.
  20
  21 # Test i386 prologue analyzer.
  22
  23
  24 if { ![is_x86_like_target] } then {
  25     verbose "Skipping i386 prologue tests."
  26     return
  27 }
  28
  29 set testfile "i386-prologue"
  30 set srcfile ${testfile}.c
  31 set binfile [standard_output_file ${testfile}]
  32
  33 # some targets have leading underscores on assembly symbols.
  34 set additional_flags [gdb_target_symbol_prefix_flags]
  35
  36 # Don't use "debug", so that we don't have line information for the assembly
  37 # fragments.
  38 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list $additional_flags]] != "" } {
  39     untested "failed to compile"
  40     return -1
  41 }
  42
  43
  44 # The code used by the tests here encodes some breakpoints by using
  45 # inline assembler.  This will generate a SIGTRAP which will be caught
  46 # by GDB.  At that point the instruction pointer will point at the
  47 # next instruction, and execution can continue without any problems.
  48 # Some systems however (QNX Neutrino, Solaris) will adjust the
  49 # instruction pointer to point at the breakpoint instruction instead.
  50 # On these systems we cannot continue unless we skip it.  This
  51 # procedure takes care of that.
  52
  53 proc skip_breakpoint { msg } {
  54     gdb_test "if (*(unsigned char *)\$pc == 0xcc)\nset \$pc = \$pc + 1\nend" \
  55             "" "skip breakpoint in ${msg}"
  56 }
  57
  58
  59 gdb_exit
  60 gdb_start
  61 gdb_reinitialize_dir $srcdir/$subdir
  62 gdb_load ${binfile}
  63
  64 #
  65 # Run to `main' where we begin our tests.
  66 #
  67
  68 if ![runto_main] then {
  69     fail "can't run to main"
  70     return 0
  71 }
  72
  73 # Testcase for standard prologue.
  74
  75 gdb_test "continue" "Program received signal SIGTRAP.*" "continue to standard"
  76
  77 skip_breakpoint standard
  78
  79 gdb_test "backtrace 10" \
  80         "#0\[ \t\]*$hex in standard.*\r\n#1\[ \t\]*$hex in main.*" \
  81         "backtrace in standard"
  82
  83 gdb_test "info frame" \
  84         ".*Saved registers:.*ebp at.*edi at.*eip at.*" \
  85         "saved registers in standard"
  86
  87
  88 # Testcase from breakpoints/2080 (when %ecx is used)
  89
  90 gdb_test "break *(stack_align_ecx + 7)" \
  91         "Breakpoint \[0-9\]* at $hex"
  92
  93 gdb_test "continue" \
  94         "Breakpoint \[0-9\]*.*stack_align_ecx.*" \
  95         "continue to stack_align_ecx + 7"
  96
  97 gdb_test "backtrace 10" \
  98         "#0\[ \t\]*$hex in stack_align_ecx.*\r\n#1\[ \t\]*$hex in main.*" \
  99         "first backtrace in stack_align_ecx"
 100
 101 gdb_test "continue" \
 102         "Program received signal SIGTRAP.*" \
 103         "continue in stack_align_ecx"
 104
 105 skip_breakpoint stack_align_ecx
 106
 107 gdb_test "backtrace 10" \
 108         "#0\[ \t\]*$hex in stack_align_ecx.*\r\n#1\[ \t\]*$hex in main.*" \
 109         "second backtrace in stack_align_ecx"
 110
 111 gdb_test "info frame" \
 112         ".*Saved registers:.*ecx at.*ebp at.*edi at.*eip at.*" \
 113         "saved registers in stack_align_ecx"
 114
 115
 116 # Testcase from breakpoints/2080 (when %edx is used)
 117
 118 gdb_test "break *(stack_align_edx + 7)" \
 119         "Breakpoint \[0-9\]* at $hex"
 120
 121 gdb_test "continue" \
 122         "Breakpoint \[0-9\]*.*stack_align_edx.*" \
 123         "continue to stack_align_edx + 7"
 124
 125 gdb_test "backtrace 10" \
 126         "#0\[ \t\]*$hex in stack_align_edx.*\r\n#1\[ \t\]*$hex in main.*" \
 127         "first backtrace in stack_align_edx"
 128
 129 gdb_test "continue" \
 130         "Program received signal SIGTRAP.*" \
 131         "continue in stack_align_edx"
 132
 133 skip_breakpoint stack_align_edx
 134
 135 gdb_test "backtrace 10" \
 136         "#0\[ \t\]*$hex in stack_align_edx.*\r\n#1\[ \t\]*$hex in main.*" \
 137         "second backtrace in stack_align_edx"
 138
 139 gdb_test "info frame" \
 140         ".*Saved registers:.*ecx at.*ebp at.*edi at.*eip at.*" \
 141         "saved registers in stack_align_edx"
 142
 143
 144 # Testcase from breakpoints/2080 (when %eax is used)
 145
 146 gdb_test "break *(stack_align_eax + 7)" \
 147         "Breakpoint \[0-9\]* at $hex"
 148
 149 gdb_test "continue" \
 150         "Breakpoint \[0-9\]*.*stack_align_eax.*" \
 151         "continue to stack_align_eax + 7"
 152
 153 gdb_test "backtrace 10" \
 154         "#0\[ \t\]*$hex in stack_align_eax.*\r\n#1\[ \t\]*$hex in main.*" \
 155         "first backtrace in stack_align_eax"
 156
 157 gdb_test "continue" \
 158         "Program received signal SIGTRAP.*" \
 159         "continue in stack_align_eax"
 160
 161 skip_breakpoint stack_align_eax
 162
 163 gdb_test "backtrace 10" \
 164         "#0\[ \t\]*$hex in stack_align_eax.*\r\n#1\[ \t\]*$hex in main.*" \
 165         "second backtrace in stack_align_eax"
 166
 167 gdb_test "info frame" \
 168         ".*Saved registers:.*ecx at.*ebp at.*edi at.*eip at.*" \
 169         "saved registers in stack_align_eax"
 170
 171
 172 # Testcase from symtab/1253.
 173
 174 gdb_test "continue" "Program received signal SIGTRAP.*" "continue to gdb1253"
 175
 176 skip_breakpoint gdb1253
 177
 178 gdb_test "backtrace 10" \
 179         "#0\[ \t\]*$hex in gdb1253.*\r\n#1\[ \t\]*$hex in main.*" \
 180         "backtrace in gdb1253"
 181
 182 gdb_test "info frame" \
 183         ".*Saved registers:.*ebp at.*edi at.*eip at.*" \
 184         "saved registers in gdb1253"
 185
 186
 187 # Testcase from backtrace/1718.
 188
 189 gdb_test "continue" "Program received signal SIGTRAP.*" "continue to gdb1718"
 190
 191 skip_breakpoint gdb1718
 192
 193 gdb_test "backtrace 10" \
 194         "#0\[ \t\]*$hex in gdb1718.*\r\n#1\[ \t\]*$hex in main.*" \
 195         "backtrace in gdb1718"
 196
 197 setup_kfail gdb/1718 *-*-*
 198 gdb_test "info frame" \
 199         ".*Saved registers:.*esi at.*ebx at.*eip at.*" \
 200         "saved registers in gdb1718"
 201
 202
 203 # Testcase from backtrace/1338.
 204
 205 gdb_test "continue" "Program received signal SIGTRAP.*" "continue to gdb1338"
 206
 207 skip_breakpoint gdb1338
 208
 209 gdb_test "backtrace 10" \
 210         "#0\[ \t\]*$hex in gdb1338.*\r\n#1\[ \t\]*$hex in main.*" \
 211         "backtrace in gdb1338"
 212
 213 gdb_test "info frame" \
 214         ".*Saved registers:.*ebx at.*esi at.*edi at.*eip at.*" \
 215         "saved registers in gdb1338"
 216
 217 # Testcase jump_at_beginning.
 218 gdb_test_multiple "break jump_at_beginning" \
 219         "set breakpoint in jump_at_beginning" {
 220     -re "Breakpoint \[0-9\]* at ($hex).*$gdb_prompt $" {
 221         gdb_test "x/i $expect_out(1,string)" \
 222                 ".*<jump_at_beginning.*>:.*jmp.*" \
 223                 "check jump_at_beginning prologue end"
 224     }
 225     default {
 226         fail "set breakpoint in jump_at_beginning"
 227     }
 228 }