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unwind.h

#ifndef _UNWIND_H_
#define _UNWIND_H_

#include <linux/list.h>

/* From ABI specifications */
00007 struct unwind_table_entry {
      unsigned int region_start;
      unsigned int region_end;
      unsigned int Cannot_unwind:1; /* 0 */
      unsigned int Millicode:1;     /* 1 */
      unsigned int Millicode_save_sr0:1;  /* 2 */
      unsigned int Region_description:2;  /* 3..4 */
      unsigned int reserved1:1;     /* 5 */
      unsigned int Entry_SR:1;      /* 6 */
      unsigned int Entry_FR:4;      /* number saved *//* 7..10 */
      unsigned int Entry_GR:5;      /* number saved *//* 11..15 */
      unsigned int Args_stored:1;   /* 16 */
      unsigned int Variable_Frame:1;      /* 17 */
      unsigned int Separate_Package_Body:1;     /* 18 */
      unsigned int Frame_Extension_Millicode:1; /* 19 */
      unsigned int Stack_Overflow_Check:1;      /* 20 */
      unsigned int Two_Instruction_SP_Increment:1;    /* 21 */
      unsigned int Ada_Region:1;    /* 22 */
      unsigned int cxx_info:1;      /* 23 */
      unsigned int cxx_try_catch:1; /* 24 */
      unsigned int sched_entry_seq:1;     /* 25 */
      unsigned int reserved2:1;     /* 26 */
      unsigned int Save_SP:1; /* 27 */
      unsigned int Save_RP:1; /* 28 */
      unsigned int Save_MRP_in_frame:1;   /* 29 */
      unsigned int extn_ptr_defined:1;    /* 30 */
      unsigned int Cleanup_defined:1;     /* 31 */
      
      unsigned int MPE_XL_interrupt_marker:1;   /* 0 */
      unsigned int HP_UX_interrupt_marker:1;    /* 1 */
      unsigned int Large_frame:1;   /* 2 */
      unsigned int Pseudo_SP_Set:1; /* 3 */
      unsigned int reserved4:1;     /* 4 */
      unsigned int Total_frame_size:27;   /* 5..31 */
};

00043 struct unwind_table {
      struct list_head list;
      const char *name;
      unsigned long gp;
      unsigned long base_addr;
      unsigned long start;
      unsigned long end;
      const struct unwind_table_entry *table;
      unsigned long length;
};

00054 struct unwind_frame_info {
      struct task_struct *t;
      /* Eventually we would like to be able to get at any of the registers
         available; but for now we only try to get the sp and ip for each
         frame */
      /* struct pt_regs regs; */
      unsigned long sp, ip, rp, r31;
      unsigned long prev_sp, prev_ip;
};

struct unwind_table *
unwind_table_add(const char *name, unsigned long base_addr, 
             unsigned long gp, void *start, void *end);
void
unwind_table_remove(struct unwind_table *table);

void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t, 
                   struct pt_regs *regs);
void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct task_struct *t);
void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *regs);
int unwind_once(struct unwind_frame_info *info);
int unwind_to_user(struct unwind_frame_info *info);

int unwind_init(void);

#endif

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