gdb/testsuite/gdb.base/pc-fp.exp

   1 #   Copyright 2002, 2004, 2007, 2008 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 # The doco makes reference to built-in registers -- $pc and $fp.  If
  17 # the ISA contains registers by that name then they should be
  18 # displayed.  If the ISA contains registers identified as being
  19 # equivalent, but have different names, then GDB will provide these as
  20 # aliases.  If the ISA doesn't provide any equivalent registers, then
  21 # GDB will provide registers that map onto the frame's PC and FP.
  22
  23 if $tracelevel then {
  24     strace $tracelevel
  25 }
  26
  27 #
  28 # test running programs
  29 #
  30 set prms_id 0
  31 set bug_id 0
  32
  33 set testfile "pc-fp"
  34 set srcfile ${testfile}.c
  35 set binfile ${objdir}/${subdir}/${testfile}
  36
  37 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug nowarnings}] != "" } {
  38     untested pc-fp.exp
  39     return -1
  40 }
  41
  42 if [get_compiler_info ${binfile}] {
  43     return -1
  44 }
  45
  46 gdb_exit
  47 gdb_start
  48 gdb_reinitialize_dir $srcdir/$subdir
  49 gdb_load ${binfile}
  50
  51 if ![runto_main] then {
  52     perror "couldn't run to breakpoint"
  53     continue
  54 }
  55
  56 proc get_valueofx { fmt exp default } {
  57     global gdb_prompt
  58     send_gdb "print${fmt} ${exp}\n"
  59     gdb_expect {
  60         -re "\\$\[0-9\]* = (0x\[0-9a-zA-Z\]+).*$gdb_prompt $" {
  61             set val $expect_out(1,string)
  62             pass "get value of ${exp}"
  63         }
  64         timeout {
  65             set val ${default}
  66             fail "get value of ${exp} (timeout)"
  67         }
  68     }
  69     return ${val}
  70 }
  71
  72 # Get the value of PC and FP
  73
  74 set valueof_pc [get_valueofx "/x" "\$pc" "0"]
  75 set valueof_fp [get_valueofx "/x" "\$fp" "0"]
  76
  77 # Check that the sequence $REGNAME -> REGNUM -> $REGNAME works.  Use
  78 # display since that encodes and then decodes the expression parameter
  79 # (and hence uses the mechanisms we're trying to test).
  80
  81 gdb_test "display/i \$pc" "1: x/i +\\\$pc( +|\r\n)${valueof_pc}.*"
  82 gdb_test "display/w \$fp" "2: x/xw +\\\$fp +${valueof_fp}.*"
  83
  84 # FIXME: cagney/2002-09-04: Should also check that ``info registers
  85 # $pc'' et.al.'' come back with the same value as the above displays
  86 # and a print --- assuming that is that people agree to such behavour.
  87 # Need to re-write default_print_registers_info() for it to work (and
  88 # such a rewrite is on the reggroups branch).
  89
  90 # gdb_test "info registers \$pc" "${valueof_pc}"
  91 # gdb_test "info registers \$fp" "${valueof_fp}"