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

   1 #   Copyright 2002, 2004 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 2 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, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16
  17 # Please email any bugs, comments, and/or additions to this file to:
  18 # bug-gdb@prep.ai.mit.edu
  19
  20 # The doco makes reference to built-in registers -- $pc and $fp.  If
  21 # the ISA contains registers by that name then they should be
  22 # displayed.  If the ISA contains registers identified as being
  23 # equivalent, but have different names, then GDB will provide these as
  24 # aliases.  If the ISA doesn't provide any equivalent registers, then
  25 # GDB will provide registers that map onto the frame's PC and FP.
  26
  27 if $tracelevel then {
  28     strace $tracelevel
  29 }
  30
  31 #
  32 # test running programs
  33 #
  34 set prms_id 0
  35 set bug_id 0
  36
  37 set testfile "pc-fp"
  38 set srcfile ${testfile}.c
  39 set binfile ${objdir}/${subdir}/${testfile}
  40
  41 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug nowarnings}] != "" } {
  42     untested pc-fp.exp
  43     return -1
  44 }
  45
  46 if [get_compiler_info ${binfile}] {
  47     return -1
  48 }
  49
  50 gdb_exit
  51 gdb_start
  52 gdb_reinitialize_dir $srcdir/$subdir
  53 gdb_load ${binfile}
  54
  55 if ![runto_main] then {
  56     perror "couldn't run to breakpoint"
  57     continue
  58 }
  59
  60 proc get_valueofx { fmt exp default } {
  61     global gdb_prompt
  62     send_gdb "print${fmt} ${exp}\n"
  63     gdb_expect {
  64         -re "\\$\[0-9\]* = (0x\[0-9a-zA-Z\]+).*$gdb_prompt $" {
  65             set val $expect_out(1,string)
  66             pass "get value of ${exp}"
  67         }
  68         timeout {
  69             set val ${default}
  70             fail "get value of ${exp} (timeout)"
  71         }
  72     }
  73     return ${val}
  74 }
  75
  76 # Get the value of PC and FP
  77
  78 set valueof_pc [get_valueofx "/x" "\$pc" "0"]
  79 set valueof_fp [get_valueofx "/x" "\$fp" "0"]
  80
  81 # Check that the sequence $REGNAME -> REGNUM -> $REGNAME works.  Use
  82 # display since that encodes and then decodes the expression parameter
  83 # (and hence uses the mechanisms we're trying to test).
  84
  85 gdb_test "display/i \$pc" "1: x/i +\\\$pc +${valueof_pc}.*"
  86 gdb_test "display/w \$fp" "2: x/xw +\\\$fp +${valueof_fp}.*"
  87
  88 # FIXME: cagney/2002-09-04: Should also check that ``info registers
  89 # $pc'' et.al.'' come back with the same value as the above displays
  90 # and a print --- assuming that is that people agree to such behavour.
  91 # Need to re-write default_print_registers_info() for it to work (and
  92 # such a rewrite is on the reggroups branch).
  93
  94 # gdb_test "info registers \$pc" "${valueof_pc}"
  95 # gdb_test "info registers \$fp" "${valueof_fp}"