1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
#ifndef _ASM_IA64_UNWIND_H
#define _ASM_IA64_UNWIND_H
/*
* Copyright (C) 1999-2000, 2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*
* A simple API for unwinding kernel stacks. This is used for
* debugging and error reporting purposes. The kernel doesn't need
* full-blown stack unwinding with all the bells and whitles, so there
* is not much point in implementing the full IA-64 unwind API (though
* it would of course be possible to implement the kernel API on top
* of it).
*/
struct task_struct; /* forward declaration */
struct switch_stack; /* forward declaration */
enum unw_application_register {
UNW_AR_BSP,
UNW_AR_BSPSTORE,
UNW_AR_PFS,
UNW_AR_RNAT,
UNW_AR_UNAT,
UNW_AR_LC,
UNW_AR_EC,
UNW_AR_FPSR,
UNW_AR_RSC,
UNW_AR_CCV,
UNW_AR_CSD,
UNW_AR_SSD
};
/*
* The following declarations are private to the unwind
* implementation:
*/
struct unw_stack {
unsigned long limit;
unsigned long top;
};
#define UNW_FLAG_INTERRUPT_FRAME (1UL << 0)
/*
* No user of this module should every access this structure directly
* as it is subject to change. It is declared here solely so we can
* use automatic variables.
*/
struct unw_frame_info {
struct unw_stack regstk;
struct unw_stack memstk;
unsigned int flags;
short hint;
short prev_script;
/* current frame info: */
unsigned long bsp; /* backing store pointer value */
unsigned long sp; /* stack pointer value */
unsigned long psp; /* previous sp value */
unsigned long ip; /* instruction pointer value */
unsigned long pr; /* current predicate values */
unsigned long *cfm_loc; /* cfm save location (or NULL) */
unsigned long pt; /* struct pt_regs location */
struct task_struct *task;
struct switch_stack *sw;
/* preserved state: */
unsigned long *bsp_loc; /* previous bsp save location */
unsigned long *bspstore_loc;
unsigned long *pfs_loc;
unsigned long *rnat_loc;
unsigned long *rp_loc;
unsigned long *pri_unat_loc;
unsigned long *unat_loc;
unsigned long *pr_loc;
unsigned long *lc_loc;
unsigned long *fpsr_loc;
struct unw_ireg {
unsigned long *loc;
struct unw_ireg_nat {
long type : 3; /* enum unw_nat_type */
signed long off : 61; /* NaT word is at loc+nat.off */
} nat;
} r4, r5, r6, r7;
unsigned long *b1_loc, *b2_loc, *b3_loc, *b4_loc, *b5_loc;
struct ia64_fpreg *f2_loc, *f3_loc, *f4_loc, *f5_loc, *fr_loc[16];
};
/*
* The official API follows below:
*/
struct unw_table_entry {
u64 start_offset;
u64 end_offset;
u64 info_offset;
};
/*
* Initialize unwind support.
*/
extern void unw_init (void);
extern void *unw_add_unwind_table (const char *name, unsigned long segment_base, unsigned long gp,
const void *table_start, const void *table_end);
extern void unw_remove_unwind_table (void *handle);
/*
* Prepare to unwind blocked task t.
*/
extern void unw_init_from_blocked_task (struct unw_frame_info *info, struct task_struct *t);
/*
* Prepare to unwind from interruption. The pt-regs and switch-stack structures must have
* be "adjacent" (no state modifications between pt-regs and switch-stack).
*/
extern void unw_init_from_interruption (struct unw_frame_info *info, struct task_struct *t,
struct pt_regs *pt, struct switch_stack *sw);
extern void unw_init_frame_info (struct unw_frame_info *info, struct task_struct *t,
struct switch_stack *sw);
/*
* Prepare to unwind the currently running thread.
*/
extern void unw_init_running (void (*callback)(struct unw_frame_info *info, void *arg), void *arg);
/*
* Unwind to previous to frame. Returns 0 if successful, negative
* number in case of an error.
*/
extern int unw_unwind (struct unw_frame_info *info);
/*
* Unwind until the return pointer is in user-land (or until an error
* occurs). Returns 0 if successful, negative number in case of
* error.
*/
extern int unw_unwind_to_user (struct unw_frame_info *info);
#define unw_is_intr_frame(info) (((info)->flags & UNW_FLAG_INTERRUPT_FRAME) != 0)
static inline int
unw_get_ip (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->ip;
return 0;
}
static inline int
unw_get_sp (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->sp;
return 0;
}
static inline int
unw_get_psp (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->psp;
return 0;
}
static inline int
unw_get_bsp (struct unw_frame_info *info, unsigned long *valp)
{
*valp = (info)->bsp;
return 0;
}
static inline int
unw_get_cfm (struct unw_frame_info *info, unsigned long *valp)
{
*valp = *(info)->cfm_loc;
return 0;
}
static inline int
unw_set_cfm (struct unw_frame_info *info, unsigned long val)
{
*(info)->cfm_loc = val;
return 0;
}
static inline int
unw_get_rp (struct unw_frame_info *info, unsigned long *val)
{
if (!info->rp_loc)
return -1;
*val = *info->rp_loc;
return 0;
}
extern int unw_access_gr (struct unw_frame_info *, int, unsigned long *, char *, int);
extern int unw_access_br (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_fr (struct unw_frame_info *, int, struct ia64_fpreg *, int);
extern int unw_access_ar (struct unw_frame_info *, int, unsigned long *, int);
extern int unw_access_pr (struct unw_frame_info *, unsigned long *, int);
static inline int
unw_set_gr (struct unw_frame_info *i, int n, unsigned long v, char nat)
{
return unw_access_gr(i, n, &v, &nat, 1);
}
static inline int
unw_set_br (struct unw_frame_info *i, int n, unsigned long v)
{
return unw_access_br(i, n, &v, 1);
}
static inline int
unw_set_fr (struct unw_frame_info *i, int n, struct ia64_fpreg v)
{
return unw_access_fr(i, n, &v, 1);
}
static inline int
unw_set_ar (struct unw_frame_info *i, int n, unsigned long v)
{
return unw_access_ar(i, n, &v, 1);
}
static inline int
unw_set_pr (struct unw_frame_info *i, unsigned long v)
{
return unw_access_pr(i, &v, 1);
}
#define unw_get_gr(i,n,v,nat) unw_access_gr(i,n,v,nat,0)
#define unw_get_br(i,n,v) unw_access_br(i,n,v,0)
#define unw_get_fr(i,n,v) unw_access_fr(i,n,v,0)
#define unw_get_ar(i,n,v) unw_access_ar(i,n,v,0)
#define unw_get_pr(i,v) unw_access_pr(i,v,0)
#endif /* _ASM_UNWIND_H */
|
