1# Copyright (C) 2016-2020 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
16if { ![is_aarch32_target] } {
17    verbose "Skipping ${gdb_test_file_name}."
18    return
19}
20
21standard_testfile
22
23if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \
24    [list debug]] } {
25    return -1
26}
27
28if { ![runto_main] } {
29    return -1
30}
31
32# Check kernel helpers are supported or not.
33
34set kernel_helper_supported 0
35gdb_test_multiple "p *kernel_user_helper_version" \
36    "check kernel helper version" {
37	-re " = ($decimal)\r\n$gdb_prompt $" {
38	    if { $expect_out(1,string) >= 1 } {
39		set kernel_helper_supported 1
40	    }
41	}
42    }
43
44if { !$kernel_helper_supported } {
45    unsupported "kernel doesn't have helpers"
46    return 0
47}
48
49# Get the instruction branching to kernel helper, they can be
50# blx rN or bx rN.
51set branch_to_kernel_helper 0
52set branch_insn "bl?x\[ \t\]*r${decimal}"
53set test "disassemble main"
54gdb_test_multiple $test $test {
55    -re ".*($hex) <\\+$decimal>:\[ \t\]+$branch_insn" {
56	set branch_to_kernel_helper $expect_out(1,string)
57	exp_continue
58    }
59    -re ".*$gdb_prompt $" {
60    }
61}
62
63if { ![gdb_assert $branch_to_kernel_helper \
64	   "find instruction branch to kernel helper"] } {
65    return
66}
67
68with_test_prefix "single-step" {
69    gdb_breakpoint "*${branch_to_kernel_helper}"
70    gdb_continue_to_breakpoint "branch to kernel helper"
71    gdb_test "si"
72
73    set test "bt"
74    gdb_test_multiple $test $test {
75	-re "#0  \[^\\r\\n\]*main .*\r\n$gdb_prompt $" {
76	    # Test that the program still stops in main rather than
77	    # somewhere else.
78	    pass $test
79	}
80	-re "#0  0xffff0fe0 .*\r\n$gdb_prompt $" {
81	    # AArch64 linux kernel can do hardware single step, so
82	    # the program can stop at kernel helper.
83	    pass $test
84	}
85
86    }
87
88    delete_breakpoints
89}
90
91with_test_prefix "cond-breakpoint" {
92    gdb_breakpoint "*${branch_to_kernel_helper} if i > 5"
93    gdb_continue_to_breakpoint "branch to kernel helper"
94    gdb_test "p i" " = 6"
95
96    delete_breakpoints
97}
98