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
  48 1:      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