LXR linux/arch/powerpc/kernel/ppc_save

   1/*
   2 * Copyright (C) 1996 Paul Mackerras.
   3 *
   4 *      This program is free software; you can redistribute it and/or
   5 *      modify it under the terms of the GNU General Public License
   6 *      as published by the Free Software Foundation; either version
   7 *      2 of the License, or (at your option) any later version.
   8 *
   9 * NOTE: assert(sizeof(buf) > 23 * sizeof(long))
  10 */
  11#include <asm/processor.h>
  12#include <asm/ppc_asm.h>
  13#include <asm/asm-offsets.h>
  14#include <asm/ptrace.h>
  15
  16/*
  17 * Grab the register values as they are now.
  18 * This won't do a particularly good job because we really
  19 * want our caller's caller's registers, and our caller has
  20 * already executed its prologue.
  21 * ToDo: We could reach back into the caller's save area to do
  22 * a better job of representing the caller's state (note that
  23 * that will be different for 32-bit and 64-bit, because of the
  24 * different ABIs, though).
  25 */
  26_GLOBAL(ppc_save_regs)
  27        PPC_STL r0,0*SZL(r3)
  28        PPC_STL r2,2*SZL(r3)
  29        PPC_STL r3,3*SZL(r3)
  30        PPC_STL r4,4*SZL(r3)
  31        PPC_STL r5,5*SZL(r3)
  32        PPC_STL r6,6*SZL(r3)
  33        PPC_STL r7,7*SZL(r3)
  34        PPC_STL r8,8*SZL(r3)
  35        PPC_STL r9,9*SZL(r3)
  36        PPC_STL r10,10*SZL(r3)
  37        PPC_STL r11,11*SZL(r3)
  38        PPC_STL r12,12*SZL(r3)
  39        PPC_STL r13,13*SZL(r3)
  40        PPC_STL r14,14*SZL(r3)
  41        PPC_STL r15,15*SZL(r3)
  42        PPC_STL r16,16*SZL(r3)
  43        PPC_STL r17,17*SZL(r3)
  44        PPC_STL r18,18*SZL(r3)
  45        PPC_STL r19,19*SZL(r3)
  46        PPC_STL r20,20*SZL(r3)
  47        PPC_STL r21,21*SZL(r3)
  48        PPC_STL r22,22*SZL(r3)
  49        PPC_STL r23,23*SZL(r3)
  50        PPC_STL r24,24*SZL(r3)
  51        PPC_STL r25,25*SZL(r3)
  52        PPC_STL r26,26*SZL(r3)
  53        PPC_STL r27,27*SZL(r3)
  54        PPC_STL r28,28*SZL(r3)
  55        PPC_STL r29,29*SZL(r3)
  56        PPC_STL r30,30*SZL(r3)
  57        PPC_STL r31,31*SZL(r3)
  58        /* go up one stack frame for SP */
  59        PPC_LL  r4,0(r1)
  60        PPC_STL r4,1*SZL(r3)
  61        /* get caller's LR */
  62        PPC_LL  r0,LRSAVE(r4)
  63        PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3)
  64        PPC_STL r0,_LINK-STACK_FRAME_OVERHEAD(r3)
  65        mfmsr   r0
  66        PPC_STL r0,_MSR-STACK_FRAME_OVERHEAD(r3)
  67        mfctr   r0
  68        PPC_STL r0,_CTR-STACK_FRAME_OVERHEAD(r3)
  69        mfxer   r0
  70        PPC_STL r0,_XER-STACK_FRAME_OVERHEAD(r3)
  71        mfcr    r0
  72        PPC_STL r0,_CCR-STACK_FRAME_OVERHEAD(r3)
  73        li      r0,0
  74        PPC_STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
  75        blr
  76