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#   Copyright 2002, 2004, 2007, 2008 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see .

# Please email any bugs, comments, and/or additions to this file to:

# bug-gdb@prep.ai.mit.edu

# The doco makes reference to built-in registers -- $pc and $fp.  If

# the ISA contains registers by that name then they should be

# displayed.  If the ISA contains registers identified as being

# equivalent, but have different names, then GDB will provide these as

# aliases.  If the ISA doesn't provide any equivalent registers, then

# GDB will provide registers that map onto the frame's PC and FP.

if $tracelevel then {

    strace $tracelevel

}

#

# test running programs

#

set prms_id 0

set bug_id 0

set testfile "pc-fp"

set srcfile ${testfile}.c

set binfile ${objdir}/${subdir}/${testfile}

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug nowarnings}] != "" } {

    untested pc-fp.exp

    return -1

}

if [get_compiler_info ${binfile}] {

    return -1

}

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

if ![runto_main] then {

    perror "couldn't run to breakpoint"

    continue

}

proc get_valueofx { fmt exp default } {

    global gdb_prompt

    send_gdb "print${fmt} ${exp}\n"

    gdb_expect {

        -re "\\$\[0-9\]* = (0x\[0-9a-zA-Z\]+).*$gdb_prompt $" {

            set val $expect_out(1,string)

            pass "get value of ${exp}"

        }

        timeout {

            set val ${default}

            fail "get value of ${exp} (timeout)"

        }

    }

    return ${val}

}

# Get the value of PC and FP

set valueof_pc [get_valueofx "/x" "\$pc" "0"]

set valueof_fp [get_valueofx "/x" "\$fp" "0"]

# Check that the sequence $REGNAME -> REGNUM -> $REGNAME works.  Use

# display since that encodes and then decodes the expression parameter

# (and hence uses the mechanisms we're trying to test).

gdb_test "display/i \$pc" "1: x/i +\\\$pc( +|\r\n)${valueof_pc}.*"

gdb_test "display/w \$fp" "2: x/xw +\\\$fp +${valueof_fp}.*"

# FIXME: cagney/2002-09-04: Should also check that ``info registers

# $pc'' et.al.'' come back with the same value as the above displays

# and a print --- assuming that is that people agree to such behavour.

# Need to re-write default_print_registers_info() for it to work (and

# such a rewrite is on the reggroups branch).

# gdb_test "info registers \$pc" "${valueof_pc}"

# gdb_test "info registers \$fp" "${valueof_fp}"