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