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