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 */
76 struct 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 */
157 struct 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 */
209 struct 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 */