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unwind.h
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1 #ifndef _UNWIND_H_
2 #define _UNWIND_H_
3 
4 #include <linux/list.h>
5 
6 /* From ABI specifications */
7 struct 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 
43 struct 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 
54 struct 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 
64 struct unwind_table *
65 unwind_table_add(const char *name, unsigned long base_addr,
66  unsigned long gp, void *start, void *end);
67 void
68 unwind_table_remove(struct unwind_table *table);
69 
70 void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t,
71  struct pt_regs *regs);
72 void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct task_struct *t);
73 void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *regs);
74 int unwind_once(struct unwind_frame_info *info);
75 int unwind_to_user(struct unwind_frame_info *info);
76 
77 int unwind_init(void);
78 
79 #endif
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