examples/ppc_longjmp.S

   1 /* longjmp for PowerPC.
   2    Copyright (C) 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <ppc_asm.tmpl>
  21
  22 # define JB_GPR1   0  /* Also known as the stack pointer */
  23 # define JB_GPR2   1
  24 # define JB_LR     2  /* The address we will return to */
  25 # define JB_GPRS   3  /* GPRs 14 through 31 are saved, 18 in total */
  26 # define JB_CR     21 /* Condition code registers. */
  27 # define JB_FPRS   22 /* FPRs 14 through 31 are saved, 18*2 words total */
  28 # define JB_SIZE   (58*4)
  29
  30 #define FP(x...) x
  31 #define FP(x...) x
  32
  33 .globl      ppc_longjmp;
  34
  35 ppc_longjmp:
  36         lwz r1,(JB_GPR1*4)(r3)
  37         lwz r2,(JB_GPR2*4)(r3)
  38         lwz r0,(JB_LR*4)(r3)
  39         lwz r14,((JB_GPRS+0)*4)(r3)
  40 FP(     lfd 14,((JB_FPRS+0*2)*4)(r3))
  41         lwz r15,((JB_GPRS+1)*4)(r3)
  42 FP(     lfd 15,((JB_FPRS+1*2)*4)(r3))
  43         lwz r16,((JB_GPRS+2)*4)(r3)
  44 FP(     lfd 16,((JB_FPRS+2*2)*4)(r3))
  45         lwz r17,((JB_GPRS+3)*4)(r3)
  46 FP(     lfd 17,((JB_FPRS+3*2)*4)(r3))
  47         lwz r18,((JB_GPRS+4)*4)(r3)
  48 FP(     lfd 18,((JB_FPRS+4*2)*4)(r3))
  49         lwz r19,((JB_GPRS+5)*4)(r3)
  50 FP(     lfd 19,((JB_FPRS+5*2)*4)(r3))
  51         lwz r20,((JB_GPRS+6)*4)(r3)
  52 FP(     lfd 20,((JB_FPRS+6*2)*4)(r3))
  53         mtlr r0
  54         lwz r21,((JB_GPRS+7)*4)(r3)
  55 FP(     lfd 21,((JB_FPRS+7*2)*4)(r3))
  56         lwz r22,((JB_GPRS+8)*4)(r3)
  57 FP(     lfd 22,((JB_FPRS+8*2)*4)(r3))
  58         lwz r0,(JB_CR*4)(r3)
  59         lwz r23,((JB_GPRS+9)*4)(r3)
  60 FP(     lfd 23,((JB_FPRS+9*2)*4)(r3))
  61         lwz r24,((JB_GPRS+10)*4)(r3)
  62 FP(     lfd 24,((JB_FPRS+10*2)*4)(r3))
  63         lwz r25,((JB_GPRS+11)*4)(r3)
  64 FP(     lfd 25,((JB_FPRS+11*2)*4)(r3))
  65         mtcrf 0xFF,r0
  66         lwz r26,((JB_GPRS+12)*4)(r3)
  67 FP(     lfd 26,((JB_FPRS+12*2)*4)(r3))
  68         lwz r27,((JB_GPRS+13)*4)(r3)
  69 FP(     lfd 27,((JB_FPRS+13*2)*4)(r3))
  70         lwz r28,((JB_GPRS+14)*4)(r3)
  71 FP(     lfd 28,((JB_FPRS+14*2)*4)(r3))
  72         lwz r29,((JB_GPRS+15)*4)(r3)
  73 FP(     lfd 29,((JB_FPRS+15*2)*4)(r3))
  74         lwz r30,((JB_GPRS+16)*4)(r3)
  75 FP(     lfd 30,((JB_FPRS+16*2)*4)(r3))
  76         lwz r31,((JB_GPRS+17)*4)(r3)
  77 FP(     lfd 31,((JB_FPRS+17*2)*4)(r3))
  78         mr r3,r4
  79         blr