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

# Copyright 2021 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 to see if gdb is properly single stepping over the
# displaced lnia instruction.  This test checks that a series
# of lnia instructions are loading ascending values as expected.

# lnia is an extended mnemonic for the addpcis instruction, which
# stores the $NIA plus an immediate value into a register.
#
#		lnia Rx == addpcis Rx,0 == lnia Rx
#		subcis Rx,value == addpcis Rx,-value

if { ![istarget powerpc*-*] } {
    verbose "Skipping powerpc lnia test."
    return
}

set retval 0

standard_testfile .s

if { [prepare_for_testing "failed to prepare" $testfile "$srcfile" \
      {debug quiet}] } {
    return -1
}

if ![runto_main] then {
      return
}

set before_pc 0
set check_pc [get_hexadecimal_valueof "\$pc" "default0"]

# set some breakpoints on the instructions below main().
set bp1 *$check_pc+4
set bp2 *$check_pc+12
set bp3 *$check_pc+16
gdb_breakpoint $bp1
gdb_breakpoint $bp2
gdb_breakpoint $bp3

# single-step through the lnia instructions, and retrieve the
# register values as we proceed.
gdb_test "stepi" "" "set r3"
set check_r3 [get_hexadecimal_valueof "\$r3" "default0"]
gdb_test "stepi" "" "set r4"
set check_r4 [get_hexadecimal_valueof "\$r4" "default0"]
gdb_test "stepi" "" "set r5"
set check_r5 [get_hexadecimal_valueof "\$r5" "default0"]
gdb_test "stepi" "" "set r6"
set check_r6 [get_hexadecimal_valueof "\$r6" "default0"]
gdb_test "stepi" "" "set r7"
set check_r7 [get_hexadecimal_valueof "\$r7" "default0"]
gdb_test "stepi" "" "set r8"
set check_r8 [get_hexadecimal_valueof "\$r8" "default0"]
gdb_test "stepi" "" "set r9"
set check_r9 [get_hexadecimal_valueof "\$r9" "default0"]

# Ensure that our register values are as expected.
# Specifically that the values loaded by the lnia instruction
# reflect the value of the PC as if the instruction was
# not displaced.
if [expr $check_r3 + 4 != $check_r4] {
    fail "unexpected value r3+4 != r4 , r3: $check_r3  r4: $check_r4 "
}
if [expr $check_r4 + 4 != $check_r5] {
    fail "unexpected value r4+4 != r5 , r4: $check_r4  r5: $check_r5 "
}
if [expr $check_r5 + 4 != $check_r6] {
    fail "unexpected value r5+4 != r6 , r5: $check_r5  r6: $check_r6 "
}
if [expr $check_r6 + 4 != $check_r7] {
    fail "unexpected value r6+4 != r7 , r6: $check_r6  r7: $check_r7 "
}
if [expr $check_r7 + 4 != $check_r8] {
    fail "unexpected value r7+4 != r8 , r7: $check_r7  r8: $check_r8 "
}
if [expr $check_r8 + 4 != $check_r9] {
    fail "unexpected value r8+4 != r9 , r8: $check_r8  r9: $check_r9 "
}

gdb_test "info break"
gdb_test "info register r3 r4 r5 r6 r7 r8 r9"
gdb_test "disas main"

# Let the inferior store all vector registers in a buffer, then dump
# the buffer and check it.