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#ifdef __powerpc64__
  41#error "On PPC64, FPR save/restore functions are provided by the linker."
  42#endif
  43
  44        .file   "crtsavres.S"
  45        .section ".text"
  46
  47#define _GLOBAL(name) \
  48        .type name,@function; \
  49        .globl name; \
  50name:
  51
  52/* Routines for saving integer registers, called by the compiler.  */
  53/* Called with r11 pointing to the stack header word of the caller of the */
  54/* function, just beyond the end of the integer save area.  */
  55
  56_GLOBAL(_savegpr_14)
  57_GLOBAL(_save32gpr_14)
  58        stw     14,-72(11)      /* save gp registers */
  59_GLOBAL(_savegpr_15)
  60_GLOBAL(_save32gpr_15)
  61        stw     15,-68(11)
  62_GLOBAL(_savegpr_16)
  63_GLOBAL(_save32gpr_16)
  64        stw     16,-64(11)
  65_GLOBAL(_savegpr_17)
  66_GLOBAL(_save32gpr_17)
  67        stw     17,-60(11)
  68_GLOBAL(_savegpr_18)
  69_GLOBAL(_save32gpr_18)
  70        stw     18,-56(11)
  71_GLOBAL(_savegpr_19)
  72_GLOBAL(_save32gpr_19)
  73        stw     19,-52(11)
  74_GLOBAL(_savegpr_20)
  75_GLOBAL(_save32gpr_20)
  76        stw     20,-48(11)
  77_GLOBAL(_savegpr_21)
  78_GLOBAL(_save32gpr_21)
  79        stw     21,-44(11)
  80_GLOBAL(_savegpr_22)
  81_GLOBAL(_save32gpr_22)
  82        stw     22,-40(11)
  83_GLOBAL(_savegpr_23)
  84_GLOBAL(_save32gpr_23)
  85        stw     23,-36(11)
  86_GLOBAL(_savegpr_24)
  87_GLOBAL(_save32gpr_24)
  88        stw     24,-32(11)
  89_GLOBAL(_savegpr_25)
  90_GLOBAL(_save32gpr_25)
  91        stw     25,-28(11)
  92_GLOBAL(_savegpr_26)
  93_GLOBAL(_save32gpr_26)
  94        stw     26,-24(11)
  95_GLOBAL(_savegpr_27)
  96_GLOBAL(_save32gpr_27)
  97        stw     27,-20(11)
  98_GLOBAL(_savegpr_28)
  99_GLOBAL(_save32gpr_28)
 100        stw     28,-16(11)
 101_GLOBAL(_savegpr_29)
 102_GLOBAL(_save32gpr_29)
 103        stw     29,-12(11)
 104_GLOBAL(_savegpr_30)
 105_GLOBAL(_save32gpr_30)
 106        stw     30,-8(11)
 107_GLOBAL(_savegpr_31)
 108_GLOBAL(_save32gpr_31)
 109        stw     31,-4(11)
 110        blr
 111
 112/* Routines for restoring integer registers, called by the compiler.  */
 113/* Called with r11 pointing to the stack header word of the caller of the */
 114/* function, just beyond the end of the integer restore area.  */
 115
 116_GLOBAL(_restgpr_14)
 117_GLOBAL(_rest32gpr_14)
 118        lwz     14,-72(11)      /* restore gp registers */
 119_GLOBAL(_restgpr_15)
 120_GLOBAL(_rest32gpr_15)
 121        lwz     15,-68(11)
 122_GLOBAL(_restgpr_16)
 123_GLOBAL(_rest32gpr_16)
 124        lwz     16,-64(11)
 125_GLOBAL(_restgpr_17)
 126_GLOBAL(_rest32gpr_17)
 127        lwz     17,-60(11)
 128_GLOBAL(_restgpr_18)
 129_GLOBAL(_rest32gpr_18)
 130        lwz     18,-56(11)
 131_GLOBAL(_restgpr_19)
 132_GLOBAL(_rest32gpr_19)
 133        lwz     19,-52(11)
 134_GLOBAL(_restgpr_20)
 135_GLOBAL(_rest32gpr_20)
 136        lwz     20,-48(11)
 137_GLOBAL(_restgpr_21)
 138_GLOBAL(_rest32gpr_21)
 139        lwz     21,-44(11)
 140_GLOBAL(_restgpr_22)
 141_GLOBAL(_rest32gpr_22)
 142        lwz     22,-40(11)
 143_GLOBAL(_restgpr_23)
 144_GLOBAL(_rest32gpr_23)
 145        lwz     23,-36(11)
 146_GLOBAL(_restgpr_24)
 147_GLOBAL(_rest32gpr_24)
 148        lwz     24,-32(11)
 149_GLOBAL(_restgpr_25)
 150_GLOBAL(_rest32gpr_25)
 151        lwz     25,-28(11)
 152_GLOBAL(_restgpr_26)
 153_GLOBAL(_rest32gpr_26)
 154        lwz     26,-24(11)
 155_GLOBAL(_restgpr_27)
 156_GLOBAL(_rest32gpr_27)
 157        lwz     27,-20(11)
 158_GLOBAL(_restgpr_28)
 159_GLOBAL(_rest32gpr_28)
 160        lwz     28,-16(11)
 161_GLOBAL(_restgpr_29)
 162_GLOBAL(_rest32gpr_29)
 163        lwz     29,-12(11)
 164_GLOBAL(_restgpr_30)
 165_GLOBAL(_rest32gpr_30)
 166        lwz     30,-8(11)
 167_GLOBAL(_restgpr_31)
 168_GLOBAL(_rest32gpr_31)
 169        lwz     31,-4(11)
 170        blr
 171
 172/* Routines for restoring integer registers, called by the compiler.  */
 173/* Called with r11 pointing to the stack header word of the caller of the */
 174/* function, just beyond the end of the integer restore area.  */
 175
 176_GLOBAL(_restgpr_14_x)
 177_GLOBAL(_rest32gpr_14_x)
 178        lwz     14,-72(11)      /* restore gp registers */
 179_GLOBAL(_restgpr_15_x)
 180_GLOBAL(_rest32gpr_15_x)
 181        lwz     15,-68(11)
 182_GLOBAL(_restgpr_16_x)
 183_GLOBAL(_rest32gpr_16_x)
 184        lwz     16,-64(11)
 185_GLOBAL(_restgpr_17_x)
 186_GLOBAL(_rest32gpr_17_x)
 187        lwz     17,-60(11)
 188_GLOBAL(_restgpr_18_x)
 189_GLOBAL(_rest32gpr_18_x)
 190        lwz     18,-56(11)
 191_GLOBAL(_restgpr_19_x)
 192_GLOBAL(_rest32gpr_19_x)
 193        lwz     19,-52(11)
 194_GLOBAL(_restgpr_20_x)
 195_GLOBAL(_rest32gpr_20_x)
 196        lwz     20,-48(11)
 197_GLOBAL(_restgpr_21_x)
 198_GLOBAL(_rest32gpr_21_x)
 199        lwz     21,-44(11)
 200_GLOBAL(_restgpr_22_x)
 201_GLOBAL(_rest32gpr_22_x)
 202        lwz     22,-40(11)
 203_GLOBAL(_restgpr_23_x)
 204_GLOBAL(_rest32gpr_23_x)
 205        lwz     23,-36(11)
 206_GLOBAL(_restgpr_24_x)
 207_GLOBAL(_rest32gpr_24_x)
 208        lwz     24,-32(11)
 209_GLOBAL(_restgpr_25_x)
 210_GLOBAL(_rest32gpr_25_x)
 211        lwz     25,-28(11)
 212_GLOBAL(_restgpr_26_x)
 213_GLOBAL(_rest32gpr_26_x)
 214        lwz     26,-24(11)
 215_GLOBAL(_restgpr_27_x)
 216_GLOBAL(_rest32gpr_27_x)
 217        lwz     27,-20(11)
 218_GLOBAL(_restgpr_28_x)
 219_GLOBAL(_rest32gpr_28_x)
 220        lwz     28,-16(11)
 221_GLOBAL(_restgpr_29_x)
 222_GLOBAL(_rest32gpr_29_x)
 223        lwz     29,-12(11)
 224_GLOBAL(_restgpr_30_x)
 225_GLOBAL(_rest32gpr_30_x)
 226        lwz     30,-8(11)
 227_GLOBAL(_restgpr_31_x)
 228_GLOBAL(_rest32gpr_31_x)
 229        lwz     0,4(11)
 230        lwz     31,-4(11)
 231        mtlr    0
 232        mr      1,11
 233        blr
 234