1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * Copyright (C) 1996 Paul Mackerras. 4 * 5 * NOTE: assert(sizeof(buf) > 23 * sizeof(long)) 6 */ 7#include <asm/processor.h> 8#include <asm/ppc_asm.h> 9#include <asm/asm-offsets.h> 10#include <asm/ptrace.h> 11#include <asm/asm-compat.h> 12 13/* 14 * Grab the register values as they are now. 15 * This won't do a particularly good job because we really 16 * want our caller's caller's registers, and our caller has 17 * already executed its prologue. 18 * ToDo: We could reach back into the caller's save area to do 19 * a better job of representing the caller's state (note that 20 * that will be different for 32-bit and 64-bit, because of the 21 * different ABIs, though). 22 */ 23_GLOBAL(ppc_save_regs) 24 PPC_STL r0,0*SZL(r3) 25#ifdef CONFIG_PPC32 26 stmw r2, 2*SZL(r3) 27#else 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#endif 59 /* go up one stack frame for SP */ 60 PPC_LL r4,0(r1) 61 PPC_STL r4,1*SZL(r3) 62 /* get caller's LR */ 63 PPC_LL r0,LRSAVE(r4) 64 PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3) 65 PPC_STL r0,_LINK-STACK_FRAME_OVERHEAD(r3) 66 mfmsr r0 67 PPC_STL r0,_MSR-STACK_FRAME_OVERHEAD(r3) 68 mfctr r0 69 PPC_STL r0,_CTR-STACK_FRAME_OVERHEAD(r3) 70 mfxer r0 71 PPC_STL r0,_XER-STACK_FRAME_OVERHEAD(r3) 72 mfcr r0 73 PPC_STL r0,_CCR-STACK_FRAME_OVERHEAD(r3) 74 li r0,0 75 PPC_STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3) 76 blr 77