root/arch/powerpc/boot/crtsavres.S
/*
 * Special support for eabi and SVR4
 *
 *   Copyright (C) 1995, 1996, 1998, 2000, 2001 Free Software Foundation, Inc.
 *   Copyright 2008 Freescale Semiconductor, Inc.
 *   Written By Michael Meissner
 *
 * Based on gcc/config/rs6000/crtsavres.asm from gcc
 *
 * This file 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 2, or (at your option) any
 * later version.
 *
 * In addition to the permissions in the GNU General Public License, the
 * Free Software Foundation gives you unlimited permission to link the
 * compiled version of this file with other programs, and to distribute
 * those programs without any restriction coming from the use of this
 * file.  (The General Public License restrictions do apply in other
 * respects; for example, they cover modification of the file, and
 * distribution when not linked into another program.)
 *
 * This file 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 *    As a special exception, if you link this library with files
 *    compiled with GCC to produce an executable, this does not cause
 *    the resulting executable to be covered by the GNU General Public License.
 *    This exception does not however invalidate any other reasons why
 *    the executable file might be covered by the GNU General Public License.
 */

#ifdef __powerpc64__
#error "On PPC64, FPR save/restore functions are provided by the linker."
#endif

        .file   "crtsavres.S"
        .section ".text"

#define _GLOBAL(name) \
        .type name,@function; \
        .globl name; \
name:

/* Routines for saving integer registers, called by the compiler.  */
/* Called with r11 pointing to the stack header word of the caller of the */
/* function, just beyond the end of the integer save area.  */

_GLOBAL(_savegpr_14)
_GLOBAL(_save32gpr_14)
        stw     14,-72(11)      /* save gp registers */
_GLOBAL(_savegpr_15)
_GLOBAL(_save32gpr_15)
        stw     15,-68(11)
_GLOBAL(_savegpr_16)
_GLOBAL(_save32gpr_16)
        stw     16,-64(11)
_GLOBAL(_savegpr_17)
_GLOBAL(_save32gpr_17)
        stw     17,-60(11)
_GLOBAL(_savegpr_18)
_GLOBAL(_save32gpr_18)
        stw     18,-56(11)
_GLOBAL(_savegpr_19)
_GLOBAL(_save32gpr_19)
        stw     19,-52(11)
_GLOBAL(_savegpr_20)
_GLOBAL(_save32gpr_20)
        stw     20,-48(11)
_GLOBAL(_savegpr_21)
_GLOBAL(_save32gpr_21)
        stw     21,-44(11)
_GLOBAL(_savegpr_22)
_GLOBAL(_save32gpr_22)
        stw     22,-40(11)
_GLOBAL(_savegpr_23)
_GLOBAL(_save32gpr_23)
        stw     23,-36(11)
_GLOBAL(_savegpr_24)
_GLOBAL(_save32gpr_24)
        stw     24,-32(11)
_GLOBAL(_savegpr_25)
_GLOBAL(_save32gpr_25)
        stw     25,-28(11)
_GLOBAL(_savegpr_26)
_GLOBAL(_save32gpr_26)
        stw     26,-24(11)
_GLOBAL(_savegpr_27)
_GLOBAL(_save32gpr_27)
        stw     27,-20(11)
_GLOBAL(_savegpr_28)
_GLOBAL(_save32gpr_28)
        stw     28,-16(11)
_GLOBAL(_savegpr_29)
_GLOBAL(_save32gpr_29)
        stw     29,-12(11)
_GLOBAL(_savegpr_30)
_GLOBAL(_save32gpr_30)
        stw     30,-8(11)
_GLOBAL(_savegpr_31)
_GLOBAL(_save32gpr_31)
        stw     31,-4(11)
        blr

/* Routines for restoring integer registers, called by the compiler.  */
/* Called with r11 pointing to the stack header word of the caller of the */
/* function, just beyond the end of the integer restore area.  */

_GLOBAL(_restgpr_14)
_GLOBAL(_rest32gpr_14)
        lwz     14,-72(11)      /* restore gp registers */
_GLOBAL(_restgpr_15)
_GLOBAL(_rest32gpr_15)
        lwz     15,-68(11)
_GLOBAL(_restgpr_16)
_GLOBAL(_rest32gpr_16)
        lwz     16,-64(11)
_GLOBAL(_restgpr_17)
_GLOBAL(_rest32gpr_17)
        lwz     17,-60(11)
_GLOBAL(_restgpr_18)
_GLOBAL(_rest32gpr_18)
        lwz     18,-56(11)
_GLOBAL(_restgpr_19)
_GLOBAL(_rest32gpr_19)
        lwz     19,-52(11)
_GLOBAL(_restgpr_20)
_GLOBAL(_rest32gpr_20)
        lwz     20,-48(11)
_GLOBAL(_restgpr_21)
_GLOBAL(_rest32gpr_21)
        lwz     21,-44(11)
_GLOBAL(_restgpr_22)
_GLOBAL(_rest32gpr_22)
        lwz     22,-40(11)
_GLOBAL(_restgpr_23)
_GLOBAL(_rest32gpr_23)
        lwz     23,-36(11)
_GLOBAL(_restgpr_24)
_GLOBAL(_rest32gpr_24)
        lwz     24,-32(11)
_GLOBAL(_restgpr_25)
_GLOBAL(_rest32gpr_25)
        lwz     25,-28(11)
_GLOBAL(_restgpr_26)
_GLOBAL(_rest32gpr_26)
        lwz     26,-24(11)
_GLOBAL(_restgpr_27)
_GLOBAL(_rest32gpr_27)
        lwz     27,-20(11)
_GLOBAL(_restgpr_28)
_GLOBAL(_rest32gpr_28)
        lwz     28,-16(11)
_GLOBAL(_restgpr_29)
_GLOBAL(_rest32gpr_29)
        lwz     29,-12(11)
_GLOBAL(_restgpr_30)
_GLOBAL(_rest32gpr_30)
        lwz     30,-8(11)
_GLOBAL(_restgpr_31)
_GLOBAL(_rest32gpr_31)
        lwz     31,-4(11)
        blr

/* Routines for restoring integer registers, called by the compiler.  */
/* Called with r11 pointing to the stack header word of the caller of the */
/* function, just beyond the end of the integer restore area.  */

_GLOBAL(_restgpr_14_x)
_GLOBAL(_rest32gpr_14_x)
        lwz     14,-72(11)      /* restore gp registers */
_GLOBAL(_restgpr_15_x)
_GLOBAL(_rest32gpr_15_x)
        lwz     15,-68(11)
_GLOBAL(_restgpr_16_x)
_GLOBAL(_rest32gpr_16_x)
        lwz     16,-64(11)
_GLOBAL(_restgpr_17_x)
_GLOBAL(_rest32gpr_17_x)
        lwz     17,-60(11)
_GLOBAL(_restgpr_18_x)
_GLOBAL(_rest32gpr_18_x)
        lwz     18,-56(11)
_GLOBAL(_restgpr_19_x)
_GLOBAL(_rest32gpr_19_x)
        lwz     19,-52(11)
_GLOBAL(_restgpr_20_x)
_GLOBAL(_rest32gpr_20_x)
        lwz     20,-48(11)
_GLOBAL(_restgpr_21_x)
_GLOBAL(_rest32gpr_21_x)
        lwz     21,-44(11)
_GLOBAL(_restgpr_22_x)
_GLOBAL(_rest32gpr_22_x)
        lwz     22,-40(11)
_GLOBAL(_restgpr_23_x)
_GLOBAL(_rest32gpr_23_x)
        lwz     23,-36(11)
_GLOBAL(_restgpr_24_x)
_GLOBAL(_rest32gpr_24_x)
        lwz     24,-32(11)
_GLOBAL(_restgpr_25_x)
_GLOBAL(_rest32gpr_25_x)
        lwz     25,-28(11)
_GLOBAL(_restgpr_26_x)
_GLOBAL(_rest32gpr_26_x)
        lwz     26,-24(11)
_GLOBAL(_restgpr_27_x)
_GLOBAL(_rest32gpr_27_x)
        lwz     27,-20(11)
_GLOBAL(_restgpr_28_x)
_GLOBAL(_rest32gpr_28_x)
        lwz     28,-16(11)
_GLOBAL(_restgpr_29_x)
_GLOBAL(_rest32gpr_29_x)
        lwz     29,-12(11)
_GLOBAL(_restgpr_30_x)
_GLOBAL(_rest32gpr_30_x)
        lwz     30,-8(11)
_GLOBAL(_restgpr_31_x)
_GLOBAL(_rest32gpr_31_x)
        lwz     0,4(11)
        lwz     31,-4(11)
        mtlr    0
        mr      1,11
        blr