1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * Copyright (C) 1998-2004 Hewlett-Packard Co
4 *	David Mosberger-Tang <davidm@hpl.hp.com>
5 *	Stephane Eranian <eranian@hpl.hp.com>
6 * Copyright (C) 2003 Intel Co
7 *	Suresh Siddha <suresh.b.siddha@intel.com>
8 *	Fenghua Yu <fenghua.yu@intel.com>
9 *	Arun Sharma <arun.sharma@intel.com>
10 *
11 * 12/07/98	S. Eranian	added pt_regs & switch_stack
12 * 12/21/98	D. Mosberger	updated to match latest code
13 *  6/17/99	D. Mosberger	added second unat member to "struct switch_stack"
14 *
15 */
16#ifndef _UAPI_ASM_IA64_PTRACE_H
17#define _UAPI_ASM_IA64_PTRACE_H
18
19/*
20 * When a user process is blocked, its state looks as follows:
21 *
22 *            +----------------------+	-------	IA64_STK_OFFSET
23 *     	      |			     |	 ^
24 *            | struct pt_regs       |	 |
25 *	      |			     |	 |
26 *            +----------------------+	 |
27 *	      |			     |	 |
28 *     	      |	   memory stack	     |	 |
29 *	      |	(growing downwards)  |	 |
30 *	      //.....................//	 |
31 *					 |
32 *	      //.....................//	 |
33 *	      |			     |	 |
34 *            +----------------------+	 |
35 *            | struct switch_stack  |	 |
36 *	      |			     |	 |
37 *	      +----------------------+	 |
38 *	      |			     |	 |
39 *	      //.....................//	 |
40 *					 |
41 *	      //.....................//	 |
42 *	      |			     |	 |
43 *	      |	 register stack	     |	 |
44 *	      |	(growing upwards)    |	 |
45 *            |			     |	 |
46 *	      +----------------------+	 |  ---	IA64_RBS_OFFSET
47 *            |  struct thread_info  |	 |  ^
48 *	      +----------------------+	 |  |
49 *	      |			     |	 |  |
50 *            |  struct task_struct  |	 |  |
51 * current -> |			     |   |  |
52 *	      +----------------------+ -------
53 *
54 * Note that ar.ec is not saved explicitly in pt_reg or switch_stack.
55 * This is because ar.ec is saved as part of ar.pfs.
56 */
57
58
59#include <asm/fpu.h>
60
61
62#ifndef __ASSEMBLY__
63
64/*
65 * This struct defines the way the registers are saved on system
66 * calls.
67 *
68 * We don't save all floating point register because the kernel
69 * is compiled to use only a very small subset, so the other are
70 * untouched.
71 *
72 * THIS STRUCTURE MUST BE A MULTIPLE 16-BYTE IN SIZE
73 * (because the memory stack pointer MUST ALWAYS be aligned this way)
74 *
75 */
76struct pt_regs {
77	/* The following registers are saved by SAVE_MIN: */
78	unsigned long b6;		/* scratch */
79	unsigned long b7;		/* scratch */
80
81	unsigned long ar_csd;           /* used by cmp8xchg16 (scratch) */
82	unsigned long ar_ssd;           /* reserved for future use (scratch) */
83
84	unsigned long r8;		/* scratch (return value register 0) */
85	unsigned long r9;		/* scratch (return value register 1) */
86	unsigned long r10;		/* scratch (return value register 2) */
87	unsigned long r11;		/* scratch (return value register 3) */
88
89	unsigned long cr_ipsr;		/* interrupted task's psr */
90	unsigned long cr_iip;		/* interrupted task's instruction pointer */
91	/*
92	 * interrupted task's function state; if bit 63 is cleared, it
93	 * contains syscall's ar.pfs.pfm:
94	 */
95	unsigned long cr_ifs;
96
97	unsigned long ar_unat;		/* interrupted task's NaT register (preserved) */
98	unsigned long ar_pfs;		/* prev function state  */
99	unsigned long ar_rsc;		/* RSE configuration */
100	/* The following two are valid only if cr_ipsr.cpl > 0 || ti->flags & _TIF_MCA_INIT */
101	unsigned long ar_rnat;		/* RSE NaT */
102	unsigned long ar_bspstore;	/* RSE bspstore */
103
104	unsigned long pr;		/* 64 predicate registers (1 bit each) */
105	unsigned long b0;		/* return pointer (bp) */
106	unsigned long loadrs;		/* size of dirty partition << 16 */
107
108	unsigned long r1;		/* the gp pointer */
109	unsigned long r12;		/* interrupted task's memory stack pointer */
110	unsigned long r13;		/* thread pointer */
111
112	unsigned long ar_fpsr;		/* floating point status (preserved) */
113	unsigned long r15;		/* scratch */
114
115	/* The remaining registers are NOT saved for system calls.  */
116
117	unsigned long r14;		/* scratch */
118	unsigned long r2;		/* scratch */
119	unsigned long r3;		/* scratch */
120
121	/* The following registers are saved by SAVE_REST: */
122	unsigned long r16;		/* scratch */
123	unsigned long r17;		/* scratch */
124	unsigned long r18;		/* scratch */
125	unsigned long r19;		/* scratch */
126	unsigned long r20;		/* scratch */
127	unsigned long r21;		/* scratch */
128	unsigned long r22;		/* scratch */
129	unsigned long r23;		/* scratch */
130	unsigned long r24;		/* scratch */
131	unsigned long r25;		/* scratch */
132	unsigned long r26;		/* scratch */
133	unsigned long r27;		/* scratch */
134	unsigned long r28;		/* scratch */
135	unsigned long r29;		/* scratch */
136	unsigned long r30;		/* scratch */
137	unsigned long r31;		/* scratch */
138
139	unsigned long ar_ccv;		/* compare/exchange value (scratch) */
140
141	/*
142	 * Floating point registers that the kernel considers scratch:
143	 */
144	struct ia64_fpreg f6;		/* scratch */
145	struct ia64_fpreg f7;		/* scratch */
146	struct ia64_fpreg f8;		/* scratch */
147	struct ia64_fpreg f9;		/* scratch */
148	struct ia64_fpreg f10;		/* scratch */
149	struct ia64_fpreg f11;		/* scratch */
150};
151
152/*
153 * This structure contains the addition registers that need to
154 * preserved across a context switch.  This generally consists of
155 * "preserved" registers.
156 */
157struct switch_stack {
158	unsigned long caller_unat;	/* user NaT collection register (preserved) */
159	unsigned long ar_fpsr;		/* floating-point status register */
160
161	struct ia64_fpreg f2;		/* preserved */
162	struct ia64_fpreg f3;		/* preserved */
163	struct ia64_fpreg f4;		/* preserved */
164	struct ia64_fpreg f5;		/* preserved */
165
166	struct ia64_fpreg f12;		/* scratch, but untouched by kernel */
167	struct ia64_fpreg f13;		/* scratch, but untouched by kernel */
168	struct ia64_fpreg f14;		/* scratch, but untouched by kernel */
169	struct ia64_fpreg f15;		/* scratch, but untouched by kernel */
170	struct ia64_fpreg f16;		/* preserved */
171	struct ia64_fpreg f17;		/* preserved */
172	struct ia64_fpreg f18;		/* preserved */
173	struct ia64_fpreg f19;		/* preserved */
174	struct ia64_fpreg f20;		/* preserved */
175	struct ia64_fpreg f21;		/* preserved */
176	struct ia64_fpreg f22;		/* preserved */
177	struct ia64_fpreg f23;		/* preserved */
178	struct ia64_fpreg f24;		/* preserved */
179	struct ia64_fpreg f25;		/* preserved */
180	struct ia64_fpreg f26;		/* preserved */
181	struct ia64_fpreg f27;		/* preserved */
182	struct ia64_fpreg f28;		/* preserved */
183	struct ia64_fpreg f29;		/* preserved */
184	struct ia64_fpreg f30;		/* preserved */
185	struct ia64_fpreg f31;		/* preserved */
186
187	unsigned long r4;		/* preserved */
188	unsigned long r5;		/* preserved */
189	unsigned long r6;		/* preserved */
190	unsigned long r7;		/* preserved */
191
192	unsigned long b0;		/* so we can force a direct return in copy_thread */
193	unsigned long b1;
194	unsigned long b2;
195	unsigned long b3;
196	unsigned long b4;
197	unsigned long b5;
198
199	unsigned long ar_pfs;		/* previous function state */
200	unsigned long ar_lc;		/* loop counter (preserved) */
201	unsigned long ar_unat;		/* NaT bits for r4-r7 */
202	unsigned long ar_rnat;		/* RSE NaT collection register */
203	unsigned long ar_bspstore;	/* RSE dirty base (preserved) */
204	unsigned long pr;		/* 64 predicate registers (1 bit each) */
205};
206
207
208/* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */
209struct pt_all_user_regs {
210	unsigned long nat;
211	unsigned long cr_iip;
212	unsigned long cfm;
213	unsigned long cr_ipsr;
214	unsigned long pr;
215
216	unsigned long gr[32];
217	unsigned long br[8];
218	unsigned long ar[128];
219	struct ia64_fpreg fr[128];
220};
221
222#endif /* !__ASSEMBLY__ */
223
224/* indices to application-registers array in pt_all_user_regs */
225#define PT_AUR_RSC	16
226#define PT_AUR_BSP	17
227#define PT_AUR_BSPSTORE	18
228#define PT_AUR_RNAT	19
229#define PT_AUR_CCV	32
230#define PT_AUR_UNAT	36
231#define PT_AUR_FPSR	40
232#define PT_AUR_PFS	64
233#define PT_AUR_LC	65
234#define PT_AUR_EC	66
235
236/*
237 * The numbers chosen here are somewhat arbitrary but absolutely MUST
238 * not overlap with any of the number assigned in <linux/ptrace.h>.
239 */
240#define PTRACE_SINGLEBLOCK	12	/* resume execution until next branch */
241#define PTRACE_OLD_GETSIGINFO	13	/* (replaced by PTRACE_GETSIGINFO in <linux/ptrace.h>)  */
242#define PTRACE_OLD_SETSIGINFO	14	/* (replaced by PTRACE_SETSIGINFO in <linux/ptrace.h>)  */
243#define PTRACE_GETREGS		18	/* get all registers (pt_all_user_regs) in one shot */
244#define PTRACE_SETREGS		19	/* set all registers (pt_all_user_regs) in one shot */
245
246#define PTRACE_OLDSETOPTIONS	21
247
248#endif /* _UAPI_ASM_IA64_PTRACE_H */
249