LXR linux/arch/powerpc/xmon/setjmp.S

   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
  15_GLOBAL(xmon_setjmp)
  16        mflr    r0
  17        PPC_STL r0,0(r3)
  18        PPC_STL r1,SZL(r3)
  19        PPC_STL r2,2*SZL(r3)
  20        mfcr    r0
  21        PPC_STL r0,3*SZL(r3)
  22        PPC_STL r13,4*SZL(r3)
  23        PPC_STL r14,5*SZL(r3)
  24        PPC_STL r15,6*SZL(r3)
  25        PPC_STL r16,7*SZL(r3)
  26        PPC_STL r17,8*SZL(r3)
  27        PPC_STL r18,9*SZL(r3)
  28        PPC_STL r19,10*SZL(r3)
  29        PPC_STL r20,11*SZL(r3)
  30        PPC_STL r21,12*SZL(r3)
  31        PPC_STL r22,13*SZL(r3)
  32        PPC_STL r23,14*SZL(r3)
  33        PPC_STL r24,15*SZL(r3)
  34        PPC_STL r25,16*SZL(r3)
  35        PPC_STL r26,17*SZL(r3)
  36        PPC_STL r27,18*SZL(r3)
  37        PPC_STL r28,19*SZL(r3)
  38        PPC_STL r29,20*SZL(r3)
  39        PPC_STL r30,21*SZL(r3)
  40        PPC_STL r31,22*SZL(r3)
  41        li      r3,0
  42        blr
  43
  44_GLOBAL(xmon_longjmp)
  45        PPC_LCMPI r4,0
  46        bne     1f
  47        li      r4,1
  481:      PPC_LL  r13,4*SZL(r3)
  49        PPC_LL  r14,5*SZL(r3)
  50        PPC_LL  r15,6*SZL(r3)
  51        PPC_LL  r16,7*SZL(r3)
  52        PPC_LL  r17,8*SZL(r3)
  53        PPC_LL  r18,9*SZL(r3)
  54        PPC_LL  r19,10*SZL(r3)
  55        PPC_LL  r20,11*SZL(r3)
  56        PPC_LL  r21,12*SZL(r3)
  57        PPC_LL  r22,13*SZL(r3)
  58        PPC_LL  r23,14*SZL(r3)
  59        PPC_LL  r24,15*SZL(r3)
  60        PPC_LL  r25,16*SZL(r3)
  61        PPC_LL  r26,17*SZL(r3)
  62        PPC_LL  r27,18*SZL(r3)
  63        PPC_LL  r28,19*SZL(r3)
  64        PPC_LL  r29,20*SZL(r3)
  65        PPC_LL  r30,21*SZL(r3)
  66        PPC_LL  r31,22*SZL(r3)
  67        PPC_LL  r0,3*SZL(r3)
  68        mtcrf   0x38,r0
  69        PPC_LL  r0,0(r3)
  70        PPC_LL  r1,SZL(r3)
  71        PPC_LL  r2,2*SZL(r3)
  72        mtlr    r0
  73        mr      r3,r4
  74        blr
  75
  76/*
  77 * Grab the register values as they are now.
  78 * This won't do a particularily good job because we really
  79 * want our caller's caller's registers, and our caller has
  80 * already executed its prologue.
  81 * ToDo: We could reach back into the caller's save area to do
  82 * a better job of representing the caller's state (note that
  83 * that will be different for 32-bit and 64-bit, because of the
  84 * different ABIs, though).
  85 */
  86_GLOBAL(xmon_save_regs)
  87        PPC_STL r0,0*SZL(r3)
  88        PPC_STL r2,2*SZL(r3)
  89        PPC_STL r3,3*SZL(r3)
  90        PPC_STL r4,4*SZL(r3)
  91        PPC_STL r5,5*SZL(r3)
  92        PPC_STL r6,6*SZL(r3)
  93        PPC_STL r7,7*SZL(r3)
  94        PPC_STL r8,8*SZL(r3)
  95        PPC_STL r9,9*SZL(r3)
  96        PPC_STL r10,10*SZL(r3)
  97        PPC_STL r11,11*SZL(r3)
  98        PPC_STL r12,12*SZL(r3)
  99        PPC_STL r13,13*SZL(r3)
 100        PPC_STL r14,14*SZL(r3)
 101        PPC_STL r15,15*SZL(r3)
 102        PPC_STL r16,16*SZL(r3)
 103        PPC_STL r17,17*SZL(r3)
 104        PPC_STL r18,18*SZL(r3)
 105        PPC_STL r19,19*SZL(r3)
 106        PPC_STL r20,20*SZL(r3)
 107        PPC_STL r21,21*SZL(r3)
 108        PPC_STL r22,22*SZL(r3)
 109        PPC_STL r23,23*SZL(r3)
 110        PPC_STL r24,24*SZL(r3)
 111        PPC_STL r25,25*SZL(r3)
 112        PPC_STL r26,26*SZL(r3)
 113        PPC_STL r27,27*SZL(r3)
 114        PPC_STL r28,28*SZL(r3)
 115        PPC_STL r29,29*SZL(r3)
 116        PPC_STL r30,30*SZL(r3)
 117        PPC_STL r31,31*SZL(r3)
 118        /* go up one stack frame for SP */
 119        PPC_LL  r4,0(r1)
 120        PPC_STL r4,1*SZL(r3)
 121        /* get caller's LR */
 122        PPC_LL  r0,LRSAVE(r4)
 123        PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3)
 124        PPC_STL r0,_LINK-STACK_FRAME_OVERHEAD(r3)
 125        mfmsr   r0
 126        PPC_STL r0,_MSR-STACK_FRAME_OVERHEAD(r3)
 127        mfctr   r0
 128        PPC_STL r0,_CTR-STACK_FRAME_OVERHEAD(r3)
 129        mfxer   r0
 130        PPC_STL r0,_XER-STACK_FRAME_OVERHEAD(r3)
 131        mfcr    r0
 132        PPC_STL r0,_CCR-STACK_FRAME_OVERHEAD(r3)
 133        li      r0,0
 134        PPC_STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
 135        blr
 136