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3666a048 | 1 | # Copyright 2018-2021 Free Software Foundation, Inc. |
0dbfcfff AB |
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 | if {![istarget "riscv*-*-*"]} { | |
17 | verbose "Skipping ${gdb_test_file_name}." | |
18 | return | |
19 | } | |
20 | ||
21 | standard_testfile | |
22 | ||
23 | if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} { | |
24 | return -1 | |
25 | } | |
26 | ||
27 | if ![runto_main] then { | |
0dbfcfff AB |
28 | return 0 |
29 | } | |
30 | ||
92dcebf3 AB |
31 | |
32 | # A list for all the integer register names and their aliases. The format is | |
33 | # a list with each entry being itself a list, the first item being the primary | |
34 | # name of a register (the name GDB uses by default), and the second entry | |
35 | # being a list of register aliases. | |
36 | set xreg_names \ | |
0dbfcfff AB |
37 | { { ra {x1} } { sp {x2} } { gp {x3} } { tp {x4} } { t0 {x5} } \ |
38 | { t1 {x6} } { t2 {x7} } { fp {x8 s0} } { s1 {x9} } { a0 {x10} } \ | |
39 | { a1 {x11} } { a2 {x12} } { a3 {x13} } { a4 {x14} } { a5 {x15} } \ | |
40 | { a6 {x16} } { a7 {x17} } { s2 {x18} } { s3 {x19} } { s4 {x20} } \ | |
41 | { s5 {x21} } { s6 {x22} } { s7 {x23} } { s8 {x24} } { s9 {x25} } \ | |
42 | { s10 {x26} } { s11 {x27} } { t3 {x28} } { t4 {x29} } { t5 {x30} } \ | |
92dcebf3 AB |
43 | { t6 {x31} } } |
44 | ||
45 | # This is just like XREG_NAMES, except it contains all the floating point | |
46 | # register names and their aliases. | |
47 | set freg_names \ | |
48 | { { ft0 {f0} } { ft1 {f1} } { ft2 {f2} } { ft3 {f3} } { ft4 {f4} } \ | |
49 | { ft5 {f5} } { ft6 {f6} } { ft7 {f7} } { fs0 {f8} } { fs1 {f9} } \ | |
50 | { fa0 {f10} } { fa1 {f11} } { fa2 {f12} } { fa3 {f13} } { fa4 {f14} } \ | |
51 | { fa5 {f15} } { fa6 {f16} } { fa7 {f17} } { fs2 {f18} } { fs3 {f19} } \ | |
52 | { fs4 {f20} } { fs5 {f21} } { fs6 {f22} } { fs7 {f23} } { fs8 {f24} } \ | |
53 | { fs9 {f25} } { fs10 {f26} } { fs11 {f27} } { ft8 {f28} } { ft9 {f29} } \ | |
54 | { ft10 {f30} } { ft11 {f31} } } | |
0dbfcfff AB |
55 | |
56 | # Check that the zero register (and its x0 alias) both contain the | |
57 | # value 0. | |
0dbfcfff AB |
58 | proc check_zero_register_value {testname} { |
59 | gdb_test "p/d \$zero" " = 0" "check \$zero: ${testname}" | |
60 | gdb_test "p/d \$x0" " = 0" "check \$x0: ${testname}" | |
61 | } | |
62 | ||
92dcebf3 AB |
63 | # Set all of the registers in REG_SET to zero. Confirm that the value of zero |
64 | # can be read back using the primary name, and from all of the alias names. | |
65 | # | |
66 | # For some architectures (RV64, RV128) the float registers have union type, | |
67 | # and we need to read/write using a ".float" extension. This is passed in | |
68 | # REG_EXTENSION. If no extension is needed then REG_EXTENSION is the empty | |
69 | # string. | |
70 | proc check_setting_registers_to_zero { reg_set reg_extension } { | |
71 | foreach reg_desc ${reg_set} { | |
72 | set primary_name [lindex ${reg_desc} 0] | |
73 | set alias_names [lindex ${reg_desc} 1] | |
74 | ||
75 | gdb_test_no_output "set \$${primary_name}${reg_extension} = 0" \ | |
76 | "set register ${primary_name} to an initial value of zero" | |
77 | gdb_test "p/d \$${primary_name}${reg_extension}" " = 0" \ | |
78 | "check the initial value of ${primary_name} is now zero" | |
79 | ||
80 | foreach reg_alias ${alias_names} { | |
81 | gdb_test "p/d \$${reg_alias}${reg_extension}" " = 0" \ | |
82 | "check the initial value of ${reg_alias} is now zero" | |
83 | } | |
84 | } | |
85 | } | |
86 | ||
87 | # Set all of the registers in REG_SET to a new value (the value starts at | |
88 | # REG_VALUE and is incremented after each test). Then confirm that the new | |
89 | # value can be read back using the primary name, and from all of the alias | |
90 | # names. | |
91 | # | |
92 | # Next, set each register in REG_SET using each of its alias names, then | |
93 | # confirm that the value can be read back using both the primary name, and all | |
94 | # of the aliases. | |
95 | # | |
96 | # The REG_EXTENSION field is used as in CHECK_SETTING_REGISTERS_TO_ZERO. | |
97 | proc check_setting_registers_to_value { reg_set reg_extension reg_value } { | |
98 | foreach reg_desc ${reg_set} { | |
99 | set primary_name [lindex ${reg_desc} 0] | |
100 | set alias_names [lindex ${reg_desc} 1] | |
101 | ||
102 | # Set value through the primary register name, and check that all | |
103 | # the aliases see the same value. | |
104 | set reg_value [incr reg_value] | |
105 | gdb_test_no_output "set \$${primary_name}${reg_extension} = $reg_value" \ | |
106 | "write non-zero value to ${primary_name}" | |
107 | gdb_test "p/d \$${primary_name}${reg_extension}" " = $reg_value" \ | |
108 | "read ${primary_name} after non-zero write to ${primary_name}" | |
109 | foreach reg_alias ${alias_names} { | |
110 | gdb_test "p/d \$${reg_alias}${reg_extension}" " = $reg_value" \ | |
111 | "read ${reg_alias} after non-zero write to ${primary_name}" | |
112 | } | |
113 | ||
114 | # For each alias, set a new value, and check that the primary | |
115 | # register name, and all the other aliases, see the new value. | |
116 | foreach reg_alias ${alias_names} { | |
117 | set reg_value [incr reg_value] | |
118 | ||
119 | gdb_test_no_output "set \$${reg_alias}${reg_extension} = $reg_value" \ | |
120 | "write non-zero value to ${reg_alias}" | |
121 | ||
122 | gdb_test "p/d \$${primary_name}${reg_extension}" " = $reg_value" \ | |
123 | "read ${primary_name} after non-zero write to ${reg_alias}" | |
124 | ||
125 | foreach other_reg_alias ${alias_names} { | |
126 | gdb_test "p/d \$${other_reg_alias}${reg_extension}" " = $reg_value" \ | |
127 | "read ${other_reg_alias} after non-zero write to ${reg_alias}" | |
128 | } | |
129 | } | |
130 | } | |
131 | } | |
132 | ||
0dbfcfff AB |
133 | # First, some testing of the zero register. This register should |
134 | # always read as zero, and should swallow any attempt to write a | |
135 | # non-zero value to the register. | |
136 | ||
137 | check_zero_register_value "before any writes" | |
138 | ||
139 | gdb_test_no_output "set \$zero = 123" \ | |
140 | "write to the \$zero register" | |
141 | ||
142 | check_zero_register_value "after write to \$zero" | |
143 | ||
144 | gdb_test_no_output "set \$x0 = 123" \ | |
145 | "write to the \$x0 register" | |
146 | ||
147 | check_zero_register_value "after write to \$x0" | |
148 | ||
92dcebf3 AB |
149 | # Some RISC-V variants model the fregs as a union (RV64, RV128). In this case |
150 | # we should access the register using 'REG_NAME.float'. In the following we | |
151 | # figure out if the field name is needed or not by looking at how GDB prints | |
152 | # on register. | |
cd115d61 | 153 | set skip_freg_tests 0 |
92dcebf3 AB |
154 | set freg_extension "INVALID" |
155 | set message "check format of float registers" | |
cd115d61 AB |
156 | gdb_test_multiple "info registers \$ft0" $message { |
157 | -re "Invalid register `ft0'\r\n$gdb_prompt $" { | |
158 | set skip_freg_tests 1 | |
159 | set freg_extension "NONE" | |
92dcebf3 | 160 | pass $message |
0dbfcfff | 161 | } |
cd115d61 | 162 | -re "ft0 \+\[0-9\]\+.*\r\n$gdb_prompt $" { |
92dcebf3 AB |
163 | set freg_extension "" |
164 | pass $message | |
0dbfcfff | 165 | } |
cd115d61 AB |
166 | -re "ft0 \+\{float = .*\r\n$gdb_prompt $" { |
167 | set freg_extension ".float" | |
168 | pass $message | |
169 | } | |
0dbfcfff | 170 | } |
92dcebf3 AB |
171 | gdb_assert ![string eq "${freg_extension}" "INVALID"] \ |
172 | "check that floating point format has been understood" | |
173 | ||
174 | # Now check that we can write zero, and read zero back to all of the integer | |
175 | # and floating point registers. | |
176 | check_setting_registers_to_zero ${xreg_names} "" | |
cd115d61 AB |
177 | |
178 | if { ! $skip_freg_tests } { | |
179 | check_setting_registers_to_zero ${freg_names} ${freg_extension} | |
180 | } | |
92dcebf3 AB |
181 | |
182 | # Set each register in turn to a new value, and confirm that the new value can | |
183 | # be read back from the primary name, and from all of the alias names. The | |
184 | # value passed in to each test invocation here is arbitrary, they are | |
185 | # significantly different so that the float tests don't reuse value from the | |
186 | # integer tests. | |
187 | check_setting_registers_to_value ${xreg_names} "" 100 | |
cd115d61 AB |
188 | |
189 | if { ! $skip_freg_tests } { | |
190 | check_setting_registers_to_value ${freg_names} ${freg_extension} 500 | |
191 | } |