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