projects / thirdparty / kernel / stable.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | #ifndef _UNWIND_H_ |
| 3 | #define _UNWIND_H_ | |
| 4 | ||
| 5 | #include <linux/list.h> | |
| 6 | ||
| c8921d72 HD |
7 | /* Max number of levels to backtrace */ |
| 8 | #define MAX_UNWIND_ENTRIES 30 | |
| 9 | ||
| 1da177e4 LT |
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; /* 2 */ | |
| 17 | unsigned int Region_description:2; /* 3..4 */ | |
| 18 | unsigned int reserved1:1; /* 5 */ | |
| 19 | unsigned int Entry_SR:1; /* 6 */ | |
| 20 | unsigned int Entry_FR:4; /* number saved *//* 7..10 */ | |
| 21 | unsigned int Entry_GR:5; /* number saved *//* 11..15 */ | |
| 22 | unsigned int Args_stored:1; /* 16 */ | |
| 23 | unsigned int Variable_Frame:1; /* 17 */ | |
| 24 | unsigned int Separate_Package_Body:1; /* 18 */ | |
| 25 | unsigned int Frame_Extension_Millicode:1; /* 19 */ | |
| 26 | unsigned int Stack_Overflow_Check:1; /* 20 */ | |
| 27 | unsigned int Two_Instruction_SP_Increment:1; /* 21 */ | |
| 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; /* 29 */ | |
| 36 | unsigned int extn_ptr_defined:1; /* 30 */ | |
| 37 | unsigned int Cleanup_defined:1; /* 31 */ | |
| 38 | ||
| 39 | unsigned int MPE_XL_interrupt_marker:1; /* 0 */ | |
| 40 | unsigned int HP_UX_interrupt_marker:1; /* 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; /* 5..31 */ | |
| 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 to get at any of the registers | |
| 61 | available; but for now we only try to get the sp and ip for each | |
| 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 long base_addr, | |
| 70 | unsigned long gp, void *start, void *end); | |
| 71 | void | |
| 72 | unwind_table_remove(struct unwind_table *table); | |
| 73 | ||
| 74 | void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t, | |
| 75 | struct pt_regs *regs); | |
| 76 | void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct task_struct *t); | |
| 77 | void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *regs); | |
| 78 | int unwind_once(struct unwind_frame_info *info); | |
| 79 | int unwind_to_user(struct unwind_frame_info *info); | |
| 80 | ||
| f0514ae3 JB |
81 | int unwind_init(void); |
| 82 | ||
| 1da177e4 | 83 | #endif |