gdb/testsuite/gdb.arch/aarch64-pauth.exp

   1 # Copyright (C) 2019-2024 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 # Test a binary with address signing works regardless of whether the target
  17 # supports pauth instructions.  On non pauth systems, all pauth instructions
  18 # are treated as nops.
  19
  20 require is_aarch64_target
  21
  22 require {have_compile_flag -mbranch-protection=pac-ret+leaf}
  23
  24 # Build program with address signing forced on.
  25 standard_testfile
  26 set compile_flags {debug}
  27 lappend compile_flags "additional_flags=-fno-inline"
  28
  29 # Records whether the compilation was successful or not.
  30 set compilation_ok 0
  31
  32 # We need to try a couple compilation flags here because -msign-return-address
  33 # was dropped at some point, but could still be supported.
  34 foreach pauth_flag "-mbranch-protection=pac-ret+leaf -msign-return-address=all" {
  35     set flags $compile_flags
  36     lappend flags "additional_flags=$pauth_flag"
  37
  38     if {!$compilation_ok && ![prepare_for_testing "failed to prepare" ${testfile} ${srcfile} ${flags}] } {
  39         set compilation_ok 1
  40     }
  41 }
  42
  43 # If we couldn't compile, just bail out.
  44 if {!$compilation_ok} {
  45     return -1
  46 }
  47
  48 if ![runto_main] {
  49     return -1
  50 }
  51
  52 gdb_breakpoint [ gdb_get_line_number "break here" ]
  53 gdb_continue_to_breakpoint "break here" ".*break here.*"
  54
  55 # Ensure we can get a full backtrace, despite the address signing.
  56 gdb_test "bt" \
  57     [multi_line \
  58         "#0\[ \t\]+bar \\(b=9\\) at \[^\r\n\]+" \
  59         "#1\[ \t\]+$hex (\\\[PAC\\\] )?in foo \\(a=5\\) at \[^\r\n\]+" \
  60         "#2\[ \t\]+$hex (\\\[PAC\\\] )?in main \\(\\) at \[^\r\n\]+" ] \
  61     "backtrace"