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

   1 # Copyright 2021-2023 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 # Test to see if gdb is properly single stepping over the
  17 # displaced lnia instruction.  This test checks that a series
  18 # of lnia instructions are loading ascending values as expected.
  19
  20 # lnia is an extended mnemonic for the addpcis instruction, which
  21 # stores the $NIA plus an immediate value into a register.
  22 #
  23 #               lnia Rx == addpcis Rx,0 == lnia Rx
  24 #               subcis Rx,value == addpcis Rx,-value
  25
  26 if { ![istarget powerpc*-*] } {
  27     verbose "Skipping powerpc lnia test."
  28     return
  29 }
  30
  31 set retval 0
  32
  33 standard_testfile .s
  34
  35 if { [prepare_for_testing "failed to prepare" $testfile "$srcfile" \
  36       {debug quiet}] } {
  37     return -1
  38 }
  39
  40 if {![runto_main]} {
  41       return
  42 }
  43
  44 set before_pc 0
  45 set check_pc [get_hexadecimal_valueof "\$pc" "default0"]
  46
  47 # set some breakpoints on the instructions below main().
  48 set bp1 *$check_pc+4
  49 set bp2 *$check_pc+12
  50 set bp3 *$check_pc+16
  51 gdb_breakpoint $bp1
  52 gdb_breakpoint $bp2
  53 gdb_breakpoint $bp3
  54
  55 # single-step through the lnia instructions, and retrieve the
  56 # register values as we proceed.
  57 set insn_supported 1
  58 gdb_test_multiple "stepi" "set r3" {
  59     -re "Program received signal SIGILL, Illegal instruction\\..*" {
  60         set insn_supported 0
  61     }
  62     -re -wrap "" {
  63         pass $gdb_test_name
  64     }
  65 }
  66 if { ! $insn_supported } {
  67     unsupported "illegal instruction"
  68     return
  69 }
  70 set check_r3 [get_hexadecimal_valueof "\$r3" "default0"]
  71 gdb_test "stepi" "" "set r4"
  72 set check_r4 [get_hexadecimal_valueof "\$r4" "default0"]
  73 gdb_test "stepi" "" "set r5"
  74 set check_r5 [get_hexadecimal_valueof "\$r5" "default0"]
  75 gdb_test "stepi" "" "set r6"
  76 set check_r6 [get_hexadecimal_valueof "\$r6" "default0"]
  77 gdb_test "stepi" "" "set r7"
  78 set check_r7 [get_hexadecimal_valueof "\$r7" "default0"]
  79 gdb_test "stepi" "" "set r8"
  80 set check_r8 [get_hexadecimal_valueof "\$r8" "default0"]
  81 gdb_test "stepi" "" "set r9"
  82 set check_r9 [get_hexadecimal_valueof "\$r9" "default0"]
  83
  84 # Ensure that our register values are as expected.
  85 # Specifically that the values loaded by the lnia instruction
  86 # reflect the value of the PC as if the instruction was
  87 # not displaced.
  88 if [expr $check_r3 + 4 != $check_r4] {
  89     fail "unexpected value r3+4 != r4 , r3: $check_r3  r4: $check_r4 "
  90 }
  91 if [expr $check_r4 + 4 != $check_r5] {
  92     fail "unexpected value r4+4 != r5 , r4: $check_r4  r5: $check_r5 "
  93 }
  94 if [expr $check_r5 + 4 != $check_r6] {
  95     fail "unexpected value r5+4 != r6 , r5: $check_r5  r6: $check_r6 "
  96 }
  97 if [expr $check_r6 + 4 != $check_r7] {
  98     fail "unexpected value r6+4 != r7 , r6: $check_r6  r7: $check_r7 "
  99 }
 100 if [expr $check_r7 + 4 != $check_r8] {
 101     fail "unexpected value r7+4 != r8 , r7: $check_r7  r8: $check_r8 "
 102 }
 103 if [expr $check_r8 + 4 != $check_r9] {
 104     fail "unexpected value r8+4 != r9 , r8: $check_r8  r9: $check_r9 "
 105 }
 106
 107 gdb_test "info break"
 108 gdb_test "info register r3 r4 r5 r6 r7 r8 r9"
 109 gdb_test "disas main"
 110
 111 # Let the inferior store all vector registers in a buffer, then dump
 112 # the buffer and check it.
 113