xref: /netbsd-src/external/gpl3/gdb.old/dist/gdb/testsuite/gdb.arch/powerpc-ppr-dscr.exp (revision e670fd5c413e99c2f6a37901bb21c537fcd322d2) 
1# Copyright (C) 2018-2019 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 access to special purpose registers PPR and DSCR.  The test
19# inferior writes to these registers, we check that GDB reads the same
20# values, then write to the registers trough GDB, step once, and check
21# again if we read back the same values.
22
23if {![istarget "powerpc*-*-linux*"]} then {
24    verbose "Skipping PowerPC test for PPR and DSCR registers."
25    return
26}
27
28standard_testfile .c
29
30if {[build_executable "compile" $binfile $srcfile {debug}] == -1} {
31    return
32}
33
34proc check_register_access { regname } {
35    global gdb_prompt
36
37    set test "$regname register access"
38    gdb_test_multiple "info reg $regname" "$test" {
39	-re "Invalid register.*\r\n$gdb_prompt $" {
40	    unsupported "$test"
41	    return 0
42	}
43	-re "\r\n$regname.*\r\n$gdb_prompt $" {
44	    pass "$test"
45	    return 1
46	}
47    }
48    return 0
49}
50
51# Do one pass to check if the instructions in our test programs are
52# available to this processor (e.g. mtspr 3, RS for accessing DSCR).
53proc ppr_dscr_available {} {
54    global gdb_prompt
55    global inferior_exited_re
56
57    set test "PPR/DSCR available to inferior"
58    gdb_test_multiple "continue" "" {
59	-re "Illegal instruction.*\r\n$gdb_prompt $" {
60	    unsupported "$test"
61	    return 0
62	}
63	-re "$inferior_exited_re normally.*$gdb_prompt $" {
64	    pass "$test"
65	    return 1
66	}
67    }
68    return 0
69}
70
71with_test_prefix "check PPR/DSCR access" {
72    clean_restart $binfile
73
74    if ![runto_main] {
75	return
76    }
77
78    if {![check_register_access "ppr"]} {
79	return
80    }
81
82    if {![check_register_access "dscr"]} {
83	return
84    }
85
86    if {![ppr_dscr_available]} {
87	return
88    }
89}
90
91# Now do the actual test
92clean_restart $binfile
93
94if ![runto_main] {
95    return
96}
97
98gdb_breakpoint [gdb_get_line_number "marker"]
99
100gdb_continue_to_breakpoint "continue to marker"
101
102# At the breakpoint the inferior should have set the
103# registers to these expected values.
104
105with_test_prefix "before write" {
106    gdb_test "info reg dscr" "dscr.*0x0*20\[ \t\]+.*"
107    gdb_test "info reg ppr" "ppr.*0x0*8000000000000\[ \t\]+.*"
108}
109
110# Set Store Stream Enable in DSCR and set PPR to the medium-low
111# priority.
112gdb_test_no_output "set \$dscr = 0x8"
113gdb_test_no_output "set \$ppr = 0xC000000000000"
114
115gdb_test "stepi" "asm.*"
116
117with_test_prefix "after write" {
118    gdb_test "info reg dscr" "dscr.*0x0*8+\[ \t\]+.*"
119    gdb_test "info reg ppr" "ppr.*0x0*\[cC\]000000000000\[ \t\]+.*"
120}
121