root/include/asm-parisc/unwind.h

INCLUDED FROM

#ifndef _UNWIND_H_
#define _UNWIND_H_

#include <linux/list.h>

/* From ABI specifications */
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 */
};

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;
};

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);

#endif