gdb/testsuite/gdb.arch/powerpc-tar.exp

   1 # Copyright (C) 2018-2024 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
  18 # Test access to special purpose register TAR (the Target Address
  19 # Register).  The test inferior writes to this register, we check that
  20 # GDB reads the same value, then write to the register the address of
  21 # another label.  We then let the inferior continue and execute a
  22 # branch to TAR and check that we stop at the address that we wrote to
  23 # register.
  24
  25 require {istarget "powerpc*-*-linux*"}
  26
  27 standard_testfile .c
  28
  29 if {[build_executable "compile" $binfile $srcfile {debug}] == -1} {
  30     return -1
  31 }
  32
  33 proc check_register_access { regname } {
  34     global gdb_prompt
  35
  36     set test "$regname register access"
  37     gdb_test_multiple "info reg $regname" "$test" {
  38         -re "Invalid register.*\r\n$gdb_prompt $" {
  39             unsupported "$test"
  40             return 0
  41         }
  42         -re "\r\n$regname.*\r\n$gdb_prompt $" {
  43             pass "$test"
  44             return 1
  45         }
  46     }
  47     return 0
  48 }
  49
  50 proc tar_available {} {
  51     global gdb_prompt
  52     global inferior_exited_re
  53
  54     set test "TAR available to inferior"
  55     gdb_test_multiple "continue" "" {
  56         -re "Illegal instruction.*\r\n$gdb_prompt $" {
  57             unsupported "$test"
  58             return 0
  59         }
  60         -re "$inferior_exited_re normally.*$gdb_prompt $" {
  61             pass "$test"
  62             return 1
  63         }
  64     }
  65     return 0
  66 }
  67
  68 # Do one pass to check if TAR is usable, system
  69 # software can prevent it from being used.
  70 with_test_prefix "check TAR access" {
  71     clean_restart $binfile
  72
  73     if ![runto_main] {
  74         return
  75     }
  76
  77     if {![check_register_access "tar"]} {
  78         return
  79     }
  80
  81     if {![tar_available]} {
  82         return
  83     }
  84 }
  85
  86 # Now do the actual test
  87 clean_restart $binfile
  88
  89 if ![runto_main] {
  90     return
  91 }
  92
  93 gdb_breakpoint [gdb_get_line_number "marker"]
  94
  95 gdb_continue_to_breakpoint "continue to marker"
  96
  97 set target1 [get_hexadecimal_valueof "target1" -1]
  98 set tar [get_hexadecimal_valueof "\$tar" -2]
  99
 100 set test "TAR value from mtspr"
 101
 102 if {${target1} == ${tar}} {
 103     pass $test
 104 } else {
 105     fail $test
 106 }
 107
 108 set target2 [get_hexadecimal_valueof "target2" -1]
 109
 110 if {$target2 == -1} {
 111     fail "Could not get value of target2"
 112     return
 113 }
 114
 115 gdb_test_no_output "set \$tar = $target2" "set tar"
 116
 117 gdb_breakpoint [gdb_get_line_number "marker 2"]
 118
 119 gdb_continue_to_breakpoint "continue to new target address" ".*marker 2.*"