1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _UNWIND_H_
3 #define _UNWIND_H_
4
5 #include <linux/list.h>
6
7 /* Max number of levels to backtrace */
8 #define MAX_UNWIND_ENTRIES 30
9
10 /* From ABI specifications */
11 struct unwind_table_entry {
12 unsigned int region_start;
13 unsigned int region_end;
14 unsigned int Cannot_unwind:1; /* 0 */
15 unsigned int Millicode:1; /* 1 *
16 unsigned int Millicode_save_sr0:1;
17 unsigned int Region_description:2;
18 unsigned int reserved1:1; /* 5 *
19 unsigned int Entry_SR:1; /* 6 *
20 unsigned int Entry_FR:4; /* num
21 unsigned int Entry_GR:5; /* num
22 unsigned int Args_stored:1; /* 16
23 unsigned int Variable_Frame:1; /* 17
24 unsigned int Separate_Package_Body:1;
25 unsigned int Frame_Extension_Millicode
26 unsigned int Stack_Overflow_Check:1;
27 unsigned int Two_Instruction_SP_Increm
28 unsigned int Ada_Region:1; /* 22
29 unsigned int cxx_info:1; /* 23
30 unsigned int cxx_try_catch:1; /* 24
31 unsigned int sched_entry_seq:1; /* 25
32 unsigned int reserved2:1; /* 26
33 unsigned int Save_SP:1; /* 27 */
34 unsigned int Save_RP:1; /* 28 */
35 unsigned int Save_MRP_in_frame:1;
36 unsigned int extn_ptr_defined:1;
37 unsigned int Cleanup_defined:1; /* 31
38
39 unsigned int MPE_XL_interrupt_marker:1
40 unsigned int HP_UX_interrupt_marker:1;
41 unsigned int Large_frame:1; /* 2 *
42 unsigned int Pseudo_SP_Set:1; /* 3 *
43 unsigned int reserved4:1; /* 4 *
44 unsigned int Total_frame_size:27;
45 };
46
47 struct unwind_table {
48 struct list_head list;
49 const char *name;
50 unsigned long gp;
51 unsigned long base_addr;
52 unsigned long start;
53 unsigned long end;
54 const struct unwind_table_entry *table
55 unsigned long length;
56 };
57
58 struct unwind_frame_info {
59 struct task_struct *t;
60 /* Eventually we would like to be able
61 available; but for now we only try
62 frame */
63 /* struct pt_regs regs; */
64 unsigned long sp, ip, rp, r31;
65 unsigned long prev_sp, prev_ip;
66 };
67
68 struct unwind_table *
69 unwind_table_add(const char *name, unsigned lo
70 unsigned long gp, void *start
71 void
72 unwind_table_remove(struct unwind_table *table
73
74 void unwind_frame_init(struct unwind_frame_inf
75 struct pt_regs *regs);
76 void unwind_frame_init_from_blocked_task(struc
77 struct task_struct *t)
78 void unwind_frame_init_task(struct unwind_fram
79 struct task_struct *ta
80 int unwind_once(struct unwind_frame_info *info
81 int unwind_to_user(struct unwind_frame_info *i
82
83 int unwind_init(void);
84
85 #endif
86
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