util/m5/src/x86/m5op.S

/*
 * Copyright (c) 2003-2006 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <gem5/asm/generic/m5ops.h>

/*
  Note: The ABI for pseudo ops using the M5OP_ADDR is defined in
  src/arch/x86/pseudo_inst_abi.hh. If the ABI is changed below, it's likely
  that the ABI in the arch directory will also need to be updated.

  The ABI for the magic instruction-based pseudo ops is not affected by this.
*/

#if defined(M5OP_ADDR) && defined(M5OP_PIC)
/* Use the memory mapped m5op interface */
#define TWO_BYTE_OP(name, number)         \
        .globl name;                      \
        .func name;                       \
name:                                     \
        mov m5_mem@gotpcrel(%rip), %r11;  \
        mov (%r11), %r11;                 \
        mov $number, %rax;                \
        shl $8, %rax;                     \
        mov 0(%r11, %rax, 1), %rax;       \
        ret;                              \
        .endfunc;

#elif defined(M5OP_ADDR) && !defined(M5OP_PIC)
/* Use the memory mapped m5op interface */
#define TWO_BYTE_OP(name, number)         \
        .globl name;                      \
        .func name;                       \
name:                                     \
        mov m5_mem, %r11;                 \
        mov $number, %rax;                \
        shl $8, %rax;                     \
        mov 0(%r11, %rax, 1), %rax;       \
        ret;                              \
        .endfunc;

#else
/* Use the magic instruction based m5op interface. This does not work
 * in virtualized environments.
 */

#define TWO_BYTE_OP(name, number)         \
        .globl name;                      \
        .func name;                       \
name:                                     \
        .byte 0x0F, 0x04;                 \
        .word number;                     \
        ret;                              \
        .endfunc;

#endif

#define M5OP(name, number) TWO_BYTE_OP(name, number)
        M5OP_FOREACH
#undef M5OP