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/* 16 * Grab the register values as they are now. 17 * This won't do a particularily good job because we really 18 * want our caller's caller's registers, and our caller has 19 * already executed its prologue. 20 * ToDo: We could reach back into the caller's save area to do 21 * a better job of representing the caller's state (note that 22 * that will be different for 32-bit and 64-bit, because of the 23 * different ABIs, though). 24 */ 25_GLOBAL(ppc_save_regs) 26 PPC_STL r0,0*SZL(r3) 27 PPC_STL r2,2*SZL(r3) 28 PPC_STL r3,3*SZL(r3) 29 PPC_STL r4,4*SZL(r3) 30 PPC_STL r5,5*SZL(r3) 31 PPC_STL r6,6*SZL(r3) 32 PPC_STL r7,7*SZL(r3) 33 PPC_STL r8,8*SZL(r3) 34 PPC_STL r9,9*SZL(r3) 35 PPC_STL r10,10*SZL(r3) 36 PPC_STL r11,11*SZL(r3) 37 PPC_STL r12,12*SZL(r3) 38 PPC_STL r13,13*SZL(r3) 39 PPC_STL r14,14*SZL(r3) 40 PPC_STL r15,15*SZL(r3) 41 PPC_STL r16,16*SZL(r3) 42 PPC_STL r17,17*SZL(r3) 43 PPC_STL r18,18*SZL(r3) 44 PPC_STL r19,19*SZL(r3) 45 PPC_STL r20,20*SZL(r3) 46 PPC_STL r21,21*SZL(r3) 47 PPC_STL r22,22*SZL(r3) 48 PPC_STL r23,23*SZL(r3) 49 PPC_STL r24,24*SZL(r3) 50 PPC_STL r25,25*SZL(r3) 51 PPC_STL r26,26*SZL(r3) 52 PPC_STL r27,27*SZL(r3) 53 PPC_STL r28,28*SZL(r3) 54 PPC_STL r29,29*SZL(r3) 55 PPC_STL r30,30*SZL(r3) 56 PPC_STL r31,31*SZL(r3) 57 /* go up one stack frame for SP */ 58 PPC_LL r4,0(r1) 59 PPC_STL r4,1*SZL(r3) 60 /* get caller's LR */ 61 PPC_LL r0,LRSAVE(r4) 62 PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3) 63 PPC_STL r0,_LINK-STACK_FRAME_OVERHEAD(r3) 64 mfmsr r0 65 PPC_STL r0,_MSR-STACK_FRAME_OVERHEAD(r3) 66 mfctr r0 67 PPC_STL r0,_CTR-STACK_FRAME_OVERHEAD(r3) 68 mfxer r0 69 PPC_STL r0,_XER-STACK_FRAME_OVERHEAD(r3) 70 mfcr r0 71 PPC_STL r0,_CCR-STACK_FRAME_OVERHEAD(r3) 72 li r0,0 73 PPC_STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3) 74 blr 75