gdb/testsuite/gdb.arch/riscv-tdesc-regs.exp

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