1# Copyright 2020-2023 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# Various tests to check which register names are available after 17# loading a new target description file, and which registers show up 18# in the output of the 'info registers' command. 19 20if {![istarget "riscv*-*-*"]} { 21 verbose "Skipping ${gdb_test_file_name}." 22 return 23} 24 25standard_testfile 26 27if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \ 28 {debug quiet}] } { 29 unsupported "failed to compile" 30 return -1 31} 32 33if { ![runto_main] } { 34 return -1 35} 36 37# First, figure out if we are 32-bit or 64-bit. 38set xlen [get_valueof "/d" "sizeof (\$a0)" 0] 39set flen [get_valueof "/d" "sizeof (\$fa0)" 0] 40 41gdb_assert { $xlen != 0 && $flen != 0 } "read xlen and flen" 42 43# We only handle 32-bit or 64-bit x-registers. 44if { $xlen != 4 && $xlen != 8 } { 45 unsupported "unknown x-register size" 46 return -1 47} 48 49# If FLEN is 1 then the target doesn't have floating point support 50# (the register $fa0 was not recognised). Otherwise, we can only 51# proceed if FLEN equals XLEN, otherwise we'd need more test XML 52# files. 53if { $flen != 1 && $flen != $xlen } { 54 unsupport "unknown xlen/flen combination" 55 return -1 56} 57 58if { $xlen == 4 } { 59 set xml_tdesc "riscv-tdesc-regs-32.xml" 60} else { 61 set xml_tdesc "riscv-tdesc-regs-64.xml" 62} 63set xml_tdesc "${srcdir}/${subdir}/${xml_tdesc}" 64 65# Maybe copy the target over if we're remote testing. 66if {[is_remote host]} { 67 set remote_file [remote_download host $xml_tdesc] 68} else { 69 set remote_file $xml_tdesc 70} 71 72gdb_test_no_output "set tdesc filename $remote_file" \ 73 "load the new target description" 74 75# Check that an alias for an unknown CSR will give a suitable error. 76gdb_test "info registers \$csr0" "Invalid register `csr0'" 77 78# Return the number of times REGISTER should appear in GROUP, this 79# will either be 0 or 1. 80proc get_expected_result { register group } { 81 82 # Everything should appear once in the 'all' group. 83 if { $group == "all" || $group == "x_all" } { 84 return 1 85 } 86 87 if { $group == "save" || $group == "restore" } { 88 # Everything is in the save/restore groups except these two. 89 if { $register == "unknown_csr" || $register == "dscratch" } { 90 return 0 91 } 92 return 1 93 } 94 95 if { $group == "system" || $group == "csr" } { 96 # All the registers we check should be in these groups. 97 return 1 98 } 99 100 return 0 101} 102 103foreach rgroup {x_all all save restore general system csr} { 104 # Now use 'info registers all' to see how many times the floating 105 # point status registers show up in the output. 106 array set reg_counts {} 107 if {$rgroup == "x_all"} { 108 set test "info all-registers" 109 } else { 110 set test "info registers $rgroup" 111 } 112 gdb_test_multiple $test $test { 113 -re ".*info registers all\r\n" { 114 verbose -log "Skip to first register" 115 exp_continue 116 } 117 -re "^(\[^ \t\]+)\[ \t\]+\[^\r\n\]+\r\n" { 118 set reg $expect_out(1,string) 119 incr reg_counts($reg) 120 exp_continue 121 } 122 -re "^$gdb_prompt $" { 123 # Done. 124 } 125 } 126 127 foreach reg {fflags frm fcsr unknown_csr dscratch} { 128 if { [info exists reg_counts($reg) ] } { 129 set count $reg_counts($reg) 130 } else { 131 set count 0 132 } 133 134 set expected_count [ get_expected_result $reg $rgroup ] 135 gdb_assert {$count == $expected_count} \ 136 "register $reg seen in reggroup $rgroup $expected_count times" 137 } 138 array unset reg_counts 139} 140 141# Next load a target description that contains fcsr, but not fflags or 142# frm. Then check that GDB provides an fflags and frm registers using 143# the pseudo-register mechanism. 144if { $xlen == 4 } { 145 set xml_tdesc "riscv-tdesc-fcsr-32.xml" 146} else { 147 set xml_tdesc "riscv-tdesc-fcsr-64.xml" 148} 149set xml_tdesc "${srcdir}/${subdir}/${xml_tdesc}" 150 151# Maybe copy the target over if we're remote testing. 152if {[is_remote host]} { 153 set remote_file [remote_download host $xml_tdesc] 154} else { 155 set remote_file $xml_tdesc 156} 157 158gdb_test_no_output "set tdesc filename $remote_file" \ 159 "load the target description that lacks fflags and frm" 160 161foreach reg {fflags frm} { 162 gdb_test_multiple "info registers $reg" "" { 163 -re "^info registers $reg\r\n" { 164 exp_continue 165 } 166 167 -wrap -re "^Invalid register `$reg`" { 168 fail $gdb_test_name 169 } 170 171 -wrap -re "^$reg\\s+\[^\r\n\]+" { 172 pass $gdb_test_name 173 } 174 } 175} 176