Subversion Repositories openrisc

/* Copyright 2009, 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 <http://www.gnu.org/licenses/>.

   This file is part of the gdb testsuite.
   It tests displaced stepping over various insns that require special
   handling.  */

        .text

        .global main
main:
        nop

/***********************************************/

/* Test call/ret.  */

        nop
        .global test_call
test_call:
        call test_call_subr
        nop
        .global test_ret_end
test_ret_end:
        nop

/***********************************************/

/* Absolute jump with leading prefixes.
   These don't occur in normal code, but gdb should still DTRT.  */

        nop
        .global test_prefixed_abs_jump
test_prefixed_abs_jump:
        ds
        jmp *test_prefixed_abs_jump_addr
        .data
test_prefixed_abs_jump_addr:
        .4byte test_prefixed_abs_jump_target
        .text
test_prefixed_abs_jump_target:
        nop
        .global test_prefixed_abs_jump_end
test_prefixed_abs_jump_end:
        nop

/***********************************************/

/* Test syscall.  */

        mov $0x14,%eax /* getpid */
        .global test_syscall
test_syscall:
        int $0x80
        nop
        .global test_syscall_end
test_syscall_end:
        nop

/***********************************************/

/* Test syscall again, this time with a prefix.
   These don't occur in normal code, but gdb should still DTRT.  */

        mov $0x14,%eax /* getpid */
        .global test_prefixed_syscall
test_prefixed_syscall:
        repnz
        int $0x80
        nop
        .global test_prefixed_syscall_end
test_prefixed_syscall_end:
        nop

/***********************************************/

/* Test stepping over int3.
   The prefixes are pointless, but it's possible, so we exercise it.  */

        nop
        .global test_int3
test_int3:
        repz
        repz
        int3
        nop
        .global test_int3_end
test_int3_end:
        nop

/***********************************************/

/* all done */

        pushl $0
        call exit
        hlt

/***********************************************/

/* subroutine to help test call/ret */

test_call_subr:
        nop
        .global test_call_end
test_call_end:
        nop

        .global test_ret
test_ret:
        ret