From f8e6e87a6e73e020d2be9b6a17c3c628142960b3 Mon Sep 17 00:00:00 2001
From: Mingrui Ma <m202271767@hust.edu.cn>
Date: Tue, 11 Apr 2023 16:36:24 +0800
Subject: [PATCH] =?UTF-8?q?d1:=20=E7=BC=96=E5=86=99=E8=A7=A3=E6=9E=90?=
 =?UTF-8?q?=E8=84=9A=E6=9C=AC=EF=BC=8C=E5=B9=B6=E8=83=BD=E8=A7=A3=E6=9E=90?=
 =?UTF-8?q?RISC-V=E8=B7=B3=E8=BD=AC=E6=8C=87=E4=BB=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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解析RISC-V跳转指令可用于定位代码段。修改readme文件。

Signed-off-by: Mingrui Ma <m202271767@hust.edu.cn>
---
 D1Image.bt | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 README.md  |  3 ++-
 2 files changed, 57 insertions(+), 1 deletion(-)
 create mode 100644 D1Image.bt

diff --git a/D1Image.bt b/D1Image.bt
new file mode 100644
index 0000000..fd1a74c
--- /dev/null
+++ b/D1Image.bt
@@ -0,0 +1,55 @@
+//------------------------------------------------
+//--- 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);
+}
diff --git a/README.md b/README.md
index c2e1a80..9ff4d76 100644
--- a/README.md
+++ b/README.md
@@ -7,10 +7,11 @@
 | 芯片型号 | 链接 |
 |:----|:----|
 | BL808 | [BL808Image.bt](./BL808Image.bt) |
+| D1 | [D1Image.bt](./D1Image.bt) |
 
 ## 许可协议
 
-本项目采用木兰宽松许可证，第2版。
+本项目采用木兰宽松许可证，第2版。   
 
 ```
 Copyright (c) 2023 RustSBI Team
-- 
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