root/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; \
  50 name:
  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