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