//------------------------------------------------
//--- 010 Editor v13.0.1 Binary Template
//
//      File: d1-flash
//   Authors: Mingrui Ma
//   Version: 0.0.0
//   Purpose: 
//  Category: 
// File Mask: 
//  ID Bytes: 
//   History: 
//------------------------------------------------
RequiresVersion( 12 );

/**** STRUCTURES ****/
struct EgonHead;

typedef struct {
    uint32 jump_instruction <format=hex, comment="address of jump_instruction">;
    ubyte magic[8];
    uint32 checksum <format=hex, comment="checksum">;
    uint32 total_length <format=hex>;
    uint32 _head_size;
    uint32 fel_script_address;
    uint32 fel_uenv_length;
    uint32 dt_name_offset;
    uint32 dram_size;
    uint32 boot_media;
    uint32 string_pool[13];
} EgonHead;

/**** PARSING CODE ****/
LittleEndian();

EgonHead head <bgcolor=cLtPurple>;

local uint32 opcode = head.jump_instruction & 0x7f;
// 0x6f JAL opcode 
if (opcode == 0x6f) 
{
    local uint32 imm1912 = (head.jump_instruction >> 12) & 0xff;
    local uint32 imm11 = (head.jump_instruction >> 20) & 0x01;
    local uint32 imm101 = (head.jump_instruction >> 21) & 0x3ff;
    local uint32 imm20 = (head.jump_instruction >> 31) & 0x01;
    local uint32 offset = (imm20 << 20) + (imm1912 << 12) + (imm11 << 11) + (imm101 << 1);

    local quad off = FTell();
    if(offset < FileSize() && head.total_length <= FileSize()) {
        FSeek(offset);
        ubyte code[head.total_length - offset] <comment="code",bgcolor=cLtGreen>;
    } else {
        Warning("code appears to either overlap with header, exist after the end of the file or overlap with the end of the file!");
    }
    FSeek(off);
}