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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _UNWIND_H_
2#define _UNWIND_H_
3
4#include <linux/list.h>
5
6/* From ABI specifications */
7struct unwind_table_entry {
8 unsigned int region_start;
9 unsigned int region_end;
10 unsigned int Cannot_unwind:1; /* 0 */
11 unsigned int Millicode:1; /* 1 */
12 unsigned int Millicode_save_sr0:1; /* 2 */
13 unsigned int Region_description:2; /* 3..4 */
14 unsigned int reserved1:1; /* 5 */
15 unsigned int Entry_SR:1; /* 6 */
16 unsigned int Entry_FR:4; /* number saved *//* 7..10 */
17 unsigned int Entry_GR:5; /* number saved *//* 11..15 */
18 unsigned int Args_stored:1; /* 16 */
19 unsigned int Variable_Frame:1; /* 17 */
20 unsigned int Separate_Package_Body:1; /* 18 */
21 unsigned int Frame_Extension_Millicode:1; /* 19 */
22 unsigned int Stack_Overflow_Check:1; /* 20 */
23 unsigned int Two_Instruction_SP_Increment:1; /* 21 */
24 unsigned int Ada_Region:1; /* 22 */
25 unsigned int cxx_info:1; /* 23 */
26 unsigned int cxx_try_catch:1; /* 24 */
27 unsigned int sched_entry_seq:1; /* 25 */
28 unsigned int reserved2:1; /* 26 */
29 unsigned int Save_SP:1; /* 27 */
30 unsigned int Save_RP:1; /* 28 */
31 unsigned int Save_MRP_in_frame:1; /* 29 */
32 unsigned int extn_ptr_defined:1; /* 30 */
33 unsigned int Cleanup_defined:1; /* 31 */
34
35 unsigned int MPE_XL_interrupt_marker:1; /* 0 */
36 unsigned int HP_UX_interrupt_marker:1; /* 1 */
37 unsigned int Large_frame:1; /* 2 */
38 unsigned int Pseudo_SP_Set:1; /* 3 */
39 unsigned int reserved4:1; /* 4 */
40 unsigned int Total_frame_size:27; /* 5..31 */
41};
42
43struct unwind_table {
44 struct list_head list;
45 const char *name;
46 unsigned long gp;
47 unsigned long base_addr;
48 unsigned long start;
49 unsigned long end;
50 const struct unwind_table_entry *table;
51 unsigned long length;
52};
53
54struct unwind_frame_info {
55 struct task_struct *t;
56 /* Eventually we would like to be able to get at any of the registers
57 available; but for now we only try to get the sp and ip for each
58 frame */
59 /* struct pt_regs regs; */
60 unsigned long sp, ip, rp, r31;
61 unsigned long prev_sp, prev_ip;
62};
63
64struct unwind_table *
65unwind_table_add(const char *name, unsigned long base_addr,
66 unsigned long gp, void *start, void *end);
67void
68unwind_table_remove(struct unwind_table *table);
69
70void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t,
71 struct pt_regs *regs);
72void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct task_struct *t);
73void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *regs);
74int unwind_once(struct unwind_frame_info *info);
75int unwind_to_user(struct unwind_frame_info *info);
76
77#endif