1# Copyright 2008-2020 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 file is part of the gdb testsuite.
17
18# Test single stepping through atomic sequences beginning with
19# a lwarx/ldarx instruction and ending with a stwcx/stdcx
20# instruction.
21
22
23if {![istarget "powerpc*"] || ![is_lp64_target]} {
24    verbose "Skipping testing of powerpc64 single stepping over atomic sequences."
25    return
26}
27
28standard_testfile .S
29
30if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} {debug quiet}] } {
31    return -1
32}
33
34# The test proper.  DISPLACED is true if we should try with displaced
35# stepping.
36proc do_test { displaced } {
37    global decimal hex
38
39    if ![runto_main] then {
40	untested "could not run to main"
41	return -1
42    }
43
44    gdb_test_no_output "set displaced-stepping $displaced"
45
46    set bp1 [gdb_get_line_number "lwarx"]
47    gdb_breakpoint "$bp1" "Breakpoint $decimal at $hex" \
48	"set the breakpoint at the start of the lwarx/stwcx sequence"
49
50    set bp2 [gdb_get_line_number "ldarx"]
51    gdb_breakpoint "$bp2" "Breakpoint $decimal at $hex" \
52	"set the breakpoint at the start of the ldarx/stdcx sequence"
53
54    gdb_test continue "Continuing.*Breakpoint $decimal.*" \
55	"continue until lwarx/stwcx start breakpoint"
56
57    gdb_test nexti "bne.*1b" \
58	"step through the lwarx/stwcx sequence"
59
60    gdb_test continue "Continuing.*Breakpoint $decimal.*" \
61	"continue until ldarx/stdcx start breakpoint"
62
63    gdb_test nexti "bne.*1b" \
64	"step through the ldarx/stdcx sequence"
65}
66
67foreach displaced { "off" "on" } {
68    with_test_prefix "displaced=$displaced" {
69	do_test $displaced
70    }
71}
72