gdb/testsuite/gdb.arch/arm-pseudo-unwind.exp

   1 # Copyright 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 test is equivalent to amd64-pseudo-unwind, but specific to ARM.  We
  17 # use the raw register d8 which is 64 bits long.  We use pseudo register s16,
  18 # which is the low 32 bits of d8.
  19
  20 if { ![istarget arm*-*-* ] } {
  21     verbose "Skipping arm pseudo register unwind."
  22     return
  23 }
  24
  25 standard_testfile arm-pseudo-unwind.c arm-pseudo-unwind-asm.S
  26
  27 if { [prepare_for_testing "failed to prepare" ${testfile} \
  28         "${srcfile} ${srcfile2}" {debug additional_flags=-marm}] } {
  29     return -1
  30 }
  31
  32 clean_restart ${binfile}
  33
  34 if {![runto_main]} {
  35     return
  36 }
  37
  38 gdb_breakpoint break_here_asm temporary
  39 gdb_continue_to_breakpoint "continue to callee"
  40
  41 # Verify the value of d8/s16 in the inner frame (callee).
  42 with_test_prefix "callee, before change" {
  43     gdb_test "p/x \$d8" " = 0x2021222324252627"
  44     gdb_test "p/x \$s16" " = 0x24252627"
  45 }
  46
  47 # Verify that we can change the value of the pseudo register (s16) in the inner
  48 # frame (callee).
  49 gdb_test_no_output "set \$s16 = 1.0"
  50
  51 # Verify the value of d8/s16 in the inner frame (callee) after the change.
  52 with_test_prefix "callee, after change" {
  53     gdb_test "p/x \$d8" " = 0x202122233f800000"
  54     gdb_test "p/x \$s16" " = 0x3f800000"
  55 }
  56
  57 # Go up one frame (to caller), and do the same.
  58 gdb_test "up"
  59
  60 # Verify the value of d8/s16 in the outer frame (caller).
  61 with_test_prefix "caller, before change" {
  62     gdb_test "p/x \$d8" " = 0x1011121314151617"
  63     gdb_test "p/x \$s16" " = 0x14151617"
  64 }
  65
  66 # Verify that we can change the value of the pseudo register (s16) in the outer
  67 # frame (caller).
  68 gdb_test_no_output "set \$s16 = 2.0"
  69
  70 # Verify the value of d8/s16 in the outer frame (caller) after the change.
  71 with_test_prefix "caller, after change" {
  72     gdb_test "p/x \$d8" " = 0x1011121340000000"
  73     gdb_test "p/x \$s16" " = 0x40000000"
  74 }
  75
  76 # Go back to frame 0 (callee), check that the change to the outer frame didn't
  77 # mess up anything there.
  78 gdb_test "down"
  79 with_test_prefix "callee, after change in caller" {
  80     gdb_test "p/x \$d8" " = 0x202122233f800000"
  81     gdb_test "p/x \$s16" " = 0x3f800000"
  82 }
  83
  84 # Verify that the value of the saved d8 we changed is correctly seen by the
  85 # inferior.
  86 gdb_breakpoint break_here_c temporary
  87 gdb_continue_to_breakpoint "continue to break_here_c"
  88 gdb_test "p/x value" " = 0x1011121340000000"