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# Copyright 2015-2023 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/>.
standard_testfile
if { ![istarget i?86-*-*] && ![istarget x86_64-*-* ] } {
unsupported "skipping x86 PKEYS tests."
return
}
set default_pkru_re 0x0
if { [istarget *-*-linux*] } {
# Starting with v4.9, the linux kernel contains commit acd547b29880
# ("x86/pkeys: Default to a restrictive init PKRU"), which sets the
# pkru register to 0x55555554 by default.
set default_pkru_re (0x0|0x55555554)
}
set comp_flags "-I${srcdir}/../nat/"
if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \
[list debug additional_flags=${comp_flags}]] } {
untested "failed to compile x86 PKEYS test."
return -1
}
if ![runto_main] {
return -1
}
set supports_pkru 0
set test "probe PKRU support"
gdb_test_multiple "print have_pkru()" $test {
-re ".. = 1\r\n$gdb_prompt $" {
pass $test
set supports_pkru 1
}
-re ".. = 0\r\n$gdb_prompt $" {
pass $test
}
}
if { !$supports_pkru } {
unsupported "processor does not support protection key feature."
return
}
# Test pkru register at startup
gdb_test "print /x \$pkru" "= $default_pkru_re" "pkru register"
# Read values from pseudo registers.
gdb_breakpoint [ gdb_get_line_number "break here 1" ]
gdb_continue_to_breakpoint "break here 1" ".*break here 1.*"
gdb_test "info register pkru" ".*pkru.*0x12345678.*" "read pkru register"
gdb_test "print /x \$pkru = 0x44444444" "= 0x44444444" "set pkru value"
gdb_test "info register pkru" ".*pkru.*0x44444444.*" "read value after setting value"
gdb_breakpoint [ gdb_get_line_number "break here 2" ]
gdb_continue_to_breakpoint "break here 2" ".*break here 2.*"
gdb_test "print /x rd_value" "= 0x44444444" "variable after reading pkru"
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