LXR linux/arch/powerpc/boot/crtsavres.S

   1/*
   2 * Special support for eabi and SVR4
   3 *
   4 *   Copyright (C) 1995, 1996, 1998, 2000, 2001 Free Software Foundation, Inc.
   5 *   Copyright 2008 Freescale Semiconductor, Inc.
   6 *   Written By Michael Meissner
   7 *
   8 * Based on gcc/config/rs6000/crtsavres.asm from gcc
   9 *
  10 * This file is free software; you can redistribute it and/or modify it
  11 * under the terms of the GNU General Public License as published by the
  12 * Free Software Foundation; either version 2, or (at your option) any
  13 * later version.
  14 *
  15 * In addition to the permissions in the GNU General Public License, the
  16 * Free Software Foundation gives you unlimited permission to link the
  17 * compiled version of this file with other programs, and to distribute
  18 * those programs without any restriction coming from the use of this
  19 * file.  (The General Public License restrictions do apply in other
  20 * respects; for example, they cover modification of the file, and
  21 * distribution when not linked into another program.)
  22 *
  23 * This file is distributed in the hope that it will be useful, but
  24 * WITHOUT ANY WARRANTY; without even the implied warranty of
  25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  26 * General Public License for more details.
  27 *
  28 * You should have received a copy of the GNU General Public License
  29 * along with this program; see the file COPYING.  If not, write to
  30 * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  31 * Boston, MA 02110-1301, USA.
  32 *
  33 *    As a special exception, if you link this library with files
  34 *    compiled with GCC to produce an executable, this does not cause
  35 *    the resulting executable to be covered by the GNU General Public License.
  36 *    This exception does not however invalidate any other reasons why
  37 *    the executable file might be covered by the GNU General Public License.
  38 */
  39
  40        .file   "crtsavres.S"
  41        .section ".text"
  42
  43/* On PowerPC64 Linux, these functions are provided by the linker.  */
  44#ifndef __powerpc64__
  45
  46#define _GLOBAL(name) \
  47        .type name,@function; \
  48        .globl name; \
  49name:
  50
  51/* Routines for saving integer registers, called by the compiler.  */
  52/* Called with r11 pointing to the stack header word of the caller of the */
  53/* function, just beyond the end of the integer save area.  */
  54
  55_GLOBAL(_savegpr_14)
  56_GLOBAL(_save32gpr_14)
  57        stw     14,-72(11)      /* save gp registers */
  58_GLOBAL(_savegpr_15)
  59_GLOBAL(_save32gpr_15)
  60        stw     15,-68(11)
  61_GLOBAL(_savegpr_16)
  62_GLOBAL(_save32gpr_16)
  63        stw     16,-64(11)
  64_GLOBAL(_savegpr_17)
  65_GLOBAL(_save32gpr_17)
  66        stw     17,-60(11)
  67_GLOBAL(_savegpr_18)
  68_GLOBAL(_save32gpr_18)
  69        stw     18,-56(11)
  70_GLOBAL(_savegpr_19)
  71_GLOBAL(_save32gpr_19)
  72        stw     19,-52(11)
  73_GLOBAL(_savegpr_20)
  74_GLOBAL(_save32gpr_20)
  75        stw     20,-48(11)
  76_GLOBAL(_savegpr_21)
  77_GLOBAL(_save32gpr_21)
  78        stw     21,-44(11)
  79_GLOBAL(_savegpr_22)
  80_GLOBAL(_save32gpr_22)
  81        stw     22,-40(11)
  82_GLOBAL(_savegpr_23)
  83_GLOBAL(_save32gpr_23)
  84        stw     23,-36(11)
  85_GLOBAL(_savegpr_24)
  86_GLOBAL(_save32gpr_24)
  87        stw     24,-32(11)
  88_GLOBAL(_savegpr_25)
  89_GLOBAL(_save32gpr_25)
  90        stw     25,-28(11)
  91_GLOBAL(_savegpr_26)
  92_GLOBAL(_save32gpr_26)
  93        stw     26,-24(11)
  94_GLOBAL(_savegpr_27)
  95_GLOBAL(_save32gpr_27)
  96        stw     27,-20(11)
  97_GLOBAL(_savegpr_28)
  98_GLOBAL(_save32gpr_28)
  99        stw     28,-16(11)
 100_GLOBAL(_savegpr_29)
 101_GLOBAL(_save32gpr_29)
 102        stw     29,-12(11)
 103_GLOBAL(_savegpr_30)
 104_GLOBAL(_save32gpr_30)
 105        stw     30,-8(11)
 106_GLOBAL(_savegpr_31)
 107_GLOBAL(_save32gpr_31)
 108        stw     31,-4(11)
 109        blr
 110
 111/* Routines for restoring integer registers, called by the compiler.  */
 112/* Called with r11 pointing to the stack header word of the caller of the */
 113/* function, just beyond the end of the integer restore area.  */
 114
 115_GLOBAL(_restgpr_14)
 116_GLOBAL(_rest32gpr_14)
 117        lwz     14,-72(11)      /* restore gp registers */
 118_GLOBAL(_restgpr_15)
 119_GLOBAL(_rest32gpr_15)
 120        lwz     15,-68(11)
 121_GLOBAL(_restgpr_16)
 122_GLOBAL(_rest32gpr_16)
 123        lwz     16,-64(11)
 124_GLOBAL(_restgpr_17)
 125_GLOBAL(_rest32gpr_17)
 126        lwz     17,-60(11)
 127_GLOBAL(_restgpr_18)
 128_GLOBAL(_rest32gpr_18)
 129        lwz     18,-56(11)
 130_GLOBAL(_restgpr_19)
 131_GLOBAL(_rest32gpr_19)
 132        lwz     19,-52(11)
 133_GLOBAL(_restgpr_20)
 134_GLOBAL(_rest32gpr_20)
 135        lwz     20,-48(11)
 136_GLOBAL(_restgpr_21)
 137_GLOBAL(_rest32gpr_21)
 138        lwz     21,-44(11)
 139_GLOBAL(_restgpr_22)
 140_GLOBAL(_rest32gpr_22)
 141        lwz     22,-40(11)
 142_GLOBAL(_restgpr_23)
 143_GLOBAL(_rest32gpr_23)
 144        lwz     23,-36(11)
 145_GLOBAL(_restgpr_24)
 146_GLOBAL(_rest32gpr_24)
 147        lwz     24,-32(11)
 148_GLOBAL(_restgpr_25)
 149_GLOBAL(_rest32gpr_25)
 150        lwz     25,-28(11)
 151_GLOBAL(_restgpr_26)
 152_GLOBAL(_rest32gpr_26)
 153        lwz     26,-24(11)
 154_GLOBAL(_restgpr_27)
 155_GLOBAL(_rest32gpr_27)
 156        lwz     27,-20(11)
 157_GLOBAL(_restgpr_28)
 158_GLOBAL(_rest32gpr_28)
 159        lwz     28,-16(11)
 160_GLOBAL(_restgpr_29)
 161_GLOBAL(_rest32gpr_29)
 162        lwz     29,-12(11)
 163_GLOBAL(_restgpr_30)
 164_GLOBAL(_rest32gpr_30)
 165        lwz     30,-8(11)
 166_GLOBAL(_restgpr_31)
 167_GLOBAL(_rest32gpr_31)
 168        lwz     31,-4(11)
 169        blr
 170
 171/* Routines for restoring integer registers, called by the compiler.  */
 172/* Called with r11 pointing to the stack header word of the caller of the */
 173/* function, just beyond the end of the integer restore area.  */
 174
 175_GLOBAL(_restgpr_14_x)
 176_GLOBAL(_rest32gpr_14_x)
 177        lwz     14,-72(11)      /* restore gp registers */
 178_GLOBAL(_restgpr_15_x)
 179_GLOBAL(_rest32gpr_15_x)
 180        lwz     15,-68(11)
 181_GLOBAL(_restgpr_16_x)
 182_GLOBAL(_rest32gpr_16_x)
 183        lwz     16,-64(11)
 184_GLOBAL(_restgpr_17_x)
 185_GLOBAL(_rest32gpr_17_x)
 186        lwz     17,-60(11)
 187_GLOBAL(_restgpr_18_x)
 188_GLOBAL(_rest32gpr_18_x)
 189        lwz     18,-56(11)
 190_GLOBAL(_restgpr_19_x)
 191_GLOBAL(_rest32gpr_19_x)
 192        lwz     19,-52(11)
 193_GLOBAL(_restgpr_20_x)
 194_GLOBAL(_rest32gpr_20_x)
 195        lwz     20,-48(11)
 196_GLOBAL(_restgpr_21_x)
 197_GLOBAL(_rest32gpr_21_x)
 198        lwz     21,-44(11)
 199_GLOBAL(_restgpr_22_x)
 200_GLOBAL(_rest32gpr_22_x)
 201        lwz     22,-40(11)
 202_GLOBAL(_restgpr_23_x)
 203_GLOBAL(_rest32gpr_23_x)
 204        lwz     23,-36(11)
 205_GLOBAL(_restgpr_24_x)
 206_GLOBAL(_rest32gpr_24_x)
 207        lwz     24,-32(11)
 208_GLOBAL(_restgpr_25_x)
 209_GLOBAL(_rest32gpr_25_x)
 210        lwz     25,-28(11)
 211_GLOBAL(_restgpr_26_x)
 212_GLOBAL(_rest32gpr_26_x)
 213        lwz     26,-24(11)
 214_GLOBAL(_restgpr_27_x)
 215_GLOBAL(_rest32gpr_27_x)
 216        lwz     27,-20(11)
 217_GLOBAL(_restgpr_28_x)
 218_GLOBAL(_rest32gpr_28_x)
 219        lwz     28,-16(11)
 220_GLOBAL(_restgpr_29_x)
 221_GLOBAL(_rest32gpr_29_x)
 222        lwz     29,-12(11)
 223_GLOBAL(_restgpr_30_x)
 224_GLOBAL(_rest32gpr_30_x)
 225        lwz     30,-8(11)
 226_GLOBAL(_restgpr_31_x)
 227_GLOBAL(_rest32gpr_31_x)
 228        lwz     0,4(11)
 229        lwz     31,-4(11)
 230        mtlr    0
 231        mr      1,11
 232        blr
 233#endif
 234