LXR linux/arch/parisc/include/asm/unwind.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   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 */
  11struct 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
  47struct 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
  58struct 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
  68struct unwind_table *
  69unwind_table_add(const char *name, unsigned long base_addr, 
  70                 unsigned long gp, void *start, void *end);
  71void
  72unwind_table_remove(struct unwind_table *table);
  73
  74void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t, 
  75                       struct pt_regs *regs);
  76void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info,
  77                        struct task_struct *t);
  78void unwind_frame_init_task(struct unwind_frame_info *info,
  79                        struct task_struct *task, struct pt_regs *regs);
  80int unwind_once(struct unwind_frame_info *info);
  81int unwind_to_user(struct unwind_frame_info *info);
  82
  83int unwind_init(void);
  84
  85#endif
  86