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

   1 #   Copyright 2002, 2004, 2007 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 # Please email any bugs, comments, and/or additions to this file to:
  17 # bug-gdb@prep.ai.mit.edu
  18
  19 # The doco makes reference to built-in registers -- $pc and $fp.  If
  20 # the ISA contains registers by that name then they should be
  21 # displayed.  If the ISA contains registers identified as being
  22 # equivalent, but have different names, then GDB will provide these as
  23 # aliases.  If the ISA doesn't provide any equivalent registers, then
  24 # GDB will provide registers that map onto the frame's PC and FP.
  25
  26 if $tracelevel then {
  27     strace $tracelevel
  28 }
  29
  30 #
  31 # test running programs
  32 #
  33 set prms_id 0
  34 set bug_id 0
  35
  36 set testfile "pc-fp"
  37 set srcfile ${testfile}.c
  38 set binfile ${objdir}/${subdir}/${testfile}
  39
  40 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug nowarnings}] != "" } {
  41     untested pc-fp.exp
  42     return -1
  43 }
  44
  45 if [get_compiler_info ${binfile}] {
  46     return -1
  47 }
  48
  49 gdb_exit
  50 gdb_start
  51 gdb_reinitialize_dir $srcdir/$subdir
  52 gdb_load ${binfile}
  53
  54 if ![runto_main] then {
  55     perror "couldn't run to breakpoint"
  56     continue
  57 }
  58
  59 proc get_valueofx { fmt exp default } {
  60     global gdb_prompt
  61     send_gdb "print${fmt} ${exp}\n"
  62     gdb_expect {
  63         -re "\\$\[0-9\]* = (0x\[0-9a-zA-Z\]+).*$gdb_prompt $" {
  64             set val $expect_out(1,string)
  65             pass "get value of ${exp}"
  66         }
  67         timeout {
  68             set val ${default}
  69             fail "get value of ${exp} (timeout)"
  70         }
  71     }
  72     return ${val}
  73 }
  74
  75 # Get the value of PC and FP
  76
  77 set valueof_pc [get_valueofx "/x" "\$pc" "0"]
  78 set valueof_fp [get_valueofx "/x" "\$fp" "0"]
  79
  80 # Check that the sequence $REGNAME -> REGNUM -> $REGNAME works.  Use
  81 # display since that encodes and then decodes the expression parameter
  82 # (and hence uses the mechanisms we're trying to test).
  83
  84 gdb_test "display/i \$pc" "1: x/i +\\\$pc( +|\r\n)${valueof_pc}.*"
  85 gdb_test "display/w \$fp" "2: x/xw +\\\$fp +${valueof_fp}.*"
  86
  87 # FIXME: cagney/2002-09-04: Should also check that ``info registers
  88 # $pc'' et.al.'' come back with the same value as the above displays
  89 # and a print --- assuming that is that people agree to such behavour.
  90 # Need to re-write default_print_registers_info() for it to work (and
  91 # such a rewrite is on the reggroups branch).
  92
  93 # gdb_test "info registers \$pc" "${valueof_pc}"
  94 # gdb_test "info registers \$fp" "${valueof_fp}"