dwarf-synthesis/DwarfSynth/c_bindings/dwarf_write.h

62 lines
1.4 KiB
C
Raw Normal View History

/** dwarf_write -- set of functions to add a given DWARF table to an ELF file
*
* Mostly based on work by emersion on Dareog
* <https://github.com/emersion/dareog>
*/
#pragma once
2018-12-23 15:36:24 +01:00
#define _XOPEN_SOURCE 700
#include "../../libdwarfw/include/dwarfw.h"
#include <libdwarf/dwarf.h>
#include <gelf.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <libelf.h>
#include <limits.h>
#include <stddef.h>
typedef uint8_t reg_t;
typedef long long int offset_t;
typedef uintptr_t addr_t;
// ====== Registers definition for x86_64 ======
#define DW_REG_RA ((reg_t)16)
#define DW_REG_RBP ((reg_t)6)
#define DW_REG_RSP ((reg_t)7)
#define DW_REG_INV ((reg_t)0xff)
#define DW_MAX_REG ((reg_t)31)
/// Very basic DWARF structure representing only CFA -- RA is at fixed offset
struct pre_dwarf_entry {
addr_t location;
reg_t cfa_offset_reg;
offset_t cfa_offset;
2019-04-01 18:51:06 +02:00
int rbp_defined;
offset_t rbp_offset;
};
struct pre_dwarf_fde {
size_t num;
struct pre_dwarf_entry* entries;
addr_t initial_location, end_location;
};
struct pre_dwarf {
size_t num_fde;
struct pre_dwarf_fde* fdes;
};
2018-12-23 15:36:24 +01:00
/// Writes the provided `pre_dwarf` as DWARF in the file `eh_path`, for the ELF file at `obj_path`
int write_dwarf(char* obj_path, char* eh_path, struct pre_dwarf* pre_dwarf);