#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <signal.h>
#include <syscall.h>

#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <fcntl.h>

#include <sys/uio.h>
#include <sys/types.h>
#include <sys/user.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/personality.h>

typedef uint8_t  u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;

typedef int8_t  s8;
typedef int16_t s16;
typedef int32_t s32;
typedef int64_t s64;

#include "elf_dwarf.h"

struct mi_buffer {
    u8 *data;
    u64 size;
};

struct mi_sourcepoint {
    u64 pc;
    int line;
    int column;
    int file;
};

struct mi_sourcefile {
    char *filename;
    char *dir;
    struct mi_buffer file;
};

struct mi_variable {
    char *name;
    s64 location;
};

struct mi_function {
    u64 low_pc;
    u64 high_pc;
    char *name;
    int variables_from;
    int variables_count;
};

struct mi_sourceinfo {
    struct mi_sourcepoint *sp_table;
    int sp_count;
    
    int source_file_count;
    struct mi_sourcefile *source_files;
    
    char **source_directories;
    int source_dirs_count;
    
    char *comp_dir;
};

struct mi_compunit {
    u64 low_pc;
    u64 high_pc;
    
    struct mi_sourceinfo source;
    
    int functions_from;
    int functions_count;
};

struct mi_debuginfo {
    struct mi_compunit compilation_units[16];
    struct mi_function functions[64]; 
    struct mi_variable variables[64];
    
    int cu_count;
    int func_count;
    int var_count;
};

struct mi_process {
    pid_t pid;
    
    u8 *elf;
    u64 elf_size;
    
    u64 base_address;
    u64 main_address;
    
    struct mi_debuginfo debug;
};

struct mi_registers {
    u64 rbp;
    u64 rbx;
    u64 rax;
    u64 rcx;
    u64 rdx;
    u64 rsi;
    u64 rdi;
    u64 rip;
    u64 rsp;
    
    struct user_regs_struct _sys;
};

#define NT_PRSTATUS 1
#define DIE(string) do { fprintf(stderr, string); exit(1); } while (0)
#define ABS(v) ((v) < 0 ? -(v) : (v))