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 /* This allows stack frame accessor macros and offsets to be used */ 25 subi r3,r3,STACK_INT_FRAME_REGS 26 PPC_STL r0,GPR0(r3) 27#ifdef CONFIG_PPC32 28 stmw r2,GPR2(r3) 29#else 30 SAVE_GPRS(2, 31, r3) 31 lbz r0,PACAIRQSOFTMASK(r13) 32 PPC_STL r0,SOFTE(r3) 33#endif 34 /* go up one stack frame for SP */ 35 PPC_LL r4,0(r1) 36 PPC_STL r4,GPR1(r3) 37 /* get caller's LR */ 38 PPC_LL r0,LRSAVE(r4) 39 PPC_STL r0,_LINK(r3) 40 mflr r0 41 PPC_STL r0,_NIP(r3) 42 mfmsr r0 43 PPC_STL r0,_MSR(r3) 44 mfctr r0 45 PPC_STL r0,_CTR(r3) 46 mfxer r0 47 PPC_STL r0,_XER(r3) 48 mfcr r0 49 PPC_STL r0,_CCR(r3) 50 li r0,0 51 PPC_STL r0,_TRAP(r3) 52 PPC_STL r0,ORIG_GPR3(r3) 53 blr 54