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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 1996 Paul Mackerras.
*
* NOTE: assert(sizeof(buf) > 23 * sizeof(long))
*/
#include <asm/processor.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
#include <asm/ptrace.h>
#include <asm/asm-compat.h>
/*
* Grab the register values as they are now.
* This won't do a particularly good job because we really
* want our caller's caller's registers, and our caller has
* already executed its prologue.
* ToDo: We could reach back into the caller's save area to do
* a better job of representing the caller's state (note that
* that will be different for 32-bit and 64-bit, because of the
* different ABIs, though).
*/
_GLOBAL(ppc_save_regs)
/* This allows stack frame accessor macros and offsets to be used */
subi r3,r3,STACK_FRAME_OVERHEAD
PPC_STL r0,GPR0(r3)
#ifdef CONFIG_PPC32
stmw r2,GPR2(r3)
#else
SAVE_GPRS(2, 31, r3)
lbz r0,PACAIRQSOFTMASK(r13)
PPC_STL r0,SOFTE(r3)
#endif
/* store current SP */
PPC_STL r1,GPR1(r3)
/* get caller's LR */
PPC_LL r4,0(r1)
PPC_LL r0,LRSAVE(r4)
PPC_STL r0,_LINK(r3)
mflr r0
PPC_STL r0,_NIP(r3)
mfmsr r0
PPC_STL r0,_MSR(r3)
mfctr r0
PPC_STL r0,_CTR(r3)
mfxer r0
PPC_STL r0,_XER(r3)
mfcr r0
PPC_STL r0,_CCR(r3)
li r0,0
PPC_STL r0,_TRAP(r3)
PPC_STL r0,ORIG_GPR3(r3)
blr
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