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

# Copyright (C) 2019-2022 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Test a binary with address signing works regardless of whether the target
# supports pauth instructions.  On non pauth systems, all pauth instructions
# are treated as nops.

if {![is_aarch64_target]} {
    verbose "Skipping ${gdb_test_file_name}."
    return
}

# Build program with address signing forced on.
standard_testfile
set compile_flags {debug}
lappend compile_flags "additional_flags=-fno-inline"

# Records whether the compilation was successful or not.
set compilation_ok 0

# We need to try a couple compilation flags here because -msign-return-address
# was dropped at some point, but could still be supported.
foreach pauth_flag "-mbranch-protection=pac-ret+leaf -msign-return-address=all" {
    set flags $compile_flags
    lappend flags "additional_flags=$pauth_flag"

    if {!$compilation_ok && ![prepare_for_testing "failed to prepare" ${testfile} ${srcfile} ${flags}] } {
	set compilation_ok 1
    }
}

# If we couldn't compile, just bail out.
if {!$compilation_ok} {
    return -1
}

if ![runto_main] {
    return -1
}

gdb_breakpoint [ gdb_get_line_number "break here" ]
gdb_continue_to_breakpoint "break here" ".*break here.*"

# Ensure we can get a full backtrace, despite the address signing.
gdb_test "bt" \
    [multi_line \
	"#0\[ \t\]+bar \\(b=9\\) at \[^\r\n\]+" \
	"#1\[ \t\]+$hex (\\\[PAC\\\] )?in foo \\(a=5\\) at \[^\r\n\]+" \
	"#2\[ \t\]+$hex (\\\[PAC\\\] )?in main \\(\\) at \[^\r\n\]+" ] \
    "backtrace"