Subversion Repositories openrisc

# Copyright 2010 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 .

# Test single stepping over Thumb-2 IT blocks.

if {![istarget arm*-*eabi*]} then {

    verbose "Skipping Thumb-2 tests."

    return

}

set testfile "thumb2-it"

set srcfile ${testfile}.S

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

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

    untested thumb2-it.exp

    return -1

}

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

if ![runto_main] then {

    untested thumb2-it.exp

    return -1

}

# Make sure that the compiler options allow Thumb-2.

gdb_test_multiple "list" "list main" {

    -re ".*@ No Thumb-2.*$gdb_prompt $" {

        pass "list main"

        untested thumb2-it.exp

        return -1

    }

    -re ".*@ Thumb-2 OK.*$gdb_prompt $" {

        pass "list main"

    }

}

proc test_it_block { func } {

    global gdb_prompt

    global software_step

    if { ! [gdb_breakpoint "*${func}"] } {

        unresolved "$func, IT block tests"

        return

    }

    gdb_test "call ${func}()" "Breakpoint.*@ Setup.*" "$func, call"

    set expected 0

    set reached 0

    set steps 0

    set ok 1

    while { $ok } {

        set ok 0

        set msg "$func, stepi $steps"

        gdb_test_multiple "stepi" "$msg" {

            -re ".*@ Setup.*$gdb_prompt $" {

                pass "$msg"

                set ok 1

            }

            -re ".*@ IT instruction, Expected == (\[0-9\]*)\r\n$gdb_prompt $" {

                set expected $expect_out(1,string)

                pass "$msg"

                set ok 1

            }

            -re ".*@ Reached.*$gdb_prompt $" {

                incr reached

                pass "$msg"

                set ok 1

                if { [regexp {@ Reached, Set ([^\r\n]*)\r\n} $expect_out(0,string) dummy change] } {

                    gdb_test "set $change" "" "$func, set $change"

                }

            }

            -re ".*@ Not reached.*$gdb_prompt $" {

                # An instruction in an IT block whose predicate is false when

                # we reach it.  If using software single step, we should not

                # stop here.

                if { $software_step } {

                    fail "$msg"

                } else {

                    pass "$msg"

                    set ok 1

                }

            }

            -re ".*@ Never reached.*$gdb_prompt $" {

                # An instruction that should be branched over.

                fail "$msg"

            }

            -re ".*@ Done.*$gdb_prompt $" {

                pass "$msg"

                if { $reached == $expected } {

                    pass "$func, correct instructions reached"

                } else {

                    fail "$func, correct instructions reached"

                }

                if { [regexp {@ Done, Check ([^\r\n]*)\r\n} $expect_out(0,string) dummy check] } {

                    gdb_test "print $check" ".* = 1" "$func, $check"

                }

            }

        }

        if { ! $ok } {

            break

        }

        incr steps

        continue

    }

    gdb_test "continue" "" "$func, continue"

    return

}

proc test_it_break { ndx } {

    global software_step

    set line [gdb_get_line_number "@ Break ${ndx}"]

    if { ! [gdb_breakpoint "${line}"] } {

        unresolved "continue to breakpoint: test ${ndx}"

        return

    }

    if { $software_step } {

        gdb_continue_to_breakpoint "test ${ndx}" ".*@ Location ${ndx}.*"

    } else {

        gdb_continue_to_breakpoint "test ${ndx}" ".*@ Break ${ndx}.*"

    }

}

# If we are using software single-stepping in GDB, then GDB will not

# stop at conditional instructions with a false predicate during stepi.

# If we are using a simulator or debug interface with hardware single

# step, then GDB will stop at such instructions.

if { [istarget arm*-linux*] } {

    set software_step 1

} else {

    set software_step 0

}

for { set i 1 } { $i <= 8 } { incr i } {

    test_it_block it_${i}

}

gdb_breakpoint "*it_breakpoints"

gdb_test "call it_breakpoints()" "Breakpoint.*"

for { set i 1 } { $i <= 7 } { incr i } {

    test_it_break ${i}

}