1042 lines
50 KiB
Markdown
1042 lines
50 KiB
Markdown
# 设计兼容层动态链接库查找
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> **Workspace:** d:\Code\Deshab
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---
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**User**
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我在SYSTEM文件夹下(即Deshab根目录)新建了一个lib文件夹,用于存放linux和Windows软件的动态链接库,把这个设计融入到现有的兼容层里。例如Deaicup-Software系统软件依赖某些egui的库或者系统的库,就需要把这些库放到SYSTEM/lib文件夹下供主程序寻找
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内核要知道如果程序要寻找动态链接库应该去哪里找
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**Assistant**
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我先了解当前项目的现状,再做规划。让我并行探索几个方面。
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FUCK 配置里有 `vmm=1` 和 `linux_guest=1`,说明已有兼容层概念。让我并行探索现状。
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PowerShell 不支持 `&&`,我用原生语法重试。
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项目已有相当成熟的兼容层(VMM 跑 Linux guest + PE shim)。让我深入读关键设计与代码。
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关键发现:`SYSTEM/lib` 已存在,且兼容层有两条独立路线——Linux 走 VMM guest(库解析在 guest 内),PE 走 UTSM 内置加载器(import 表解析在 pe_loader.c)。让我读关键实现代码。
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Linux 路线清楚了:ELF 的 `.so` 解析发生在 Linux guest 内部。现在读 PE loader 的 import 解析(PE DLL 搜索路径的核心)和 Deaicup 构建目标。
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关键发现:PE 加载器目前是**纯 shim 模式**——`resolve_imports()` 只查内置 shim 表(`pe_shim_lookup`),不加载任何真实 DLL 文件。而 Linux 侧的 `.so` 解析发生在 guest 内部。我需要再确认几个关键点来制定方案。
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现在我对两条路线都清楚了。让我确认 DSK 侧 FAT32 子目录读取能力(决定 `SYSTEM/lib` 子目录可访问性),再看 DSK 如何把 PE 文件喂给 pe_service。
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我已经完整理解了当前架构。让我梳理关键事实,然后进入规划。
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**核心发现**:
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1. **两条兼容路线的库解析机制完全不同**:
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- **Linux ELF**([linux_compat.c](file:///d:/Code/Deshab/CODE/UTSM/vmm/linux_compat.c)):`.so` 解析发生在 Linux guest 内部,daemon 用 `execv` 执行,**当前不设任何环境变量**。`SYSTEM/lib` 是 UTSM 侧 FAT32 目录,guest 默认看不到。
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- **PE/EXE**([pe_loader.c:153](file:///d:/Code/Deshab/CODE/UTSM/pe/pe_loader.c#L153)):`resolve_imports()` **只查内置 shim 表**(`pe_shim_lookup`),完全不加载真实 DLL 文件,找不到就填 `unimpl_stub`。
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2. **FAT32 子目录遍历已具备**([dsk_loader.c:399](file:///d:/Code/Deshab/CODE/UTSM/kernel/dsk_loader.c#L399) `fat32_read_path`),但仅限 8.3 文件名、单文件 ≤2MB。`SYSTEM/lib` 可通过路径 `"LIB "` 访问。
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3. **Deaicup Software**:`src/`(Linux 版,egui/eframe 静态链接)、`pe/`(PE 版,静态 egui + hand-written Win32 backend,Win32 API 走 shim)。**egui 实际是静态链接的**,不需要外部 `.so`/`.dll`。
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这是一个跨多组件、有多个架构决策点的设计任务。我需要进入规划模式,先和你确认几个关键方向。
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我已经对代码库做了充分探索,理解了两条兼容路线的完整机制。在制定方案前,有几个关键方向性决策需要你确认——它们会显著改变实现范围和工程量。
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用户选择了最完整的方案:PE 真实 DLL 加载 + Linux 全量推送 + LFN 长文件名。这是个大工程。我需要再看几个关键文件来设计实现细节——pe_shim 机制、PE 结构定义、以及 DSK 侧是否有独立的 FAT32 解析器。
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### Relevant Code Snippets
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1. d:\Code\Deshab\CODE\UTSM\kernel\dsk_loader.c:L82-L128
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— DSK/UTSM 侧内嵌 FAT32 解析器核心结构定义:`fat32_bpb`、`fat32_dir_entry`,以及 8.3 目录项名称比较 helper;这是 `fat32_read_path` / `fat32_find_in_dir` 的数据模型。
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2. d:\Code\Deshab\CODE\UTSM\kernel\dsk_loader.c:L234-L290
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— DSK 主内核加载路径:从真实块设备读取前 256 扇区 BPB+FAT+root dir,随后遍历根目录簇链查找 `DESHAB ELF`;包含目录项过滤 `attr == 0x0F`(跳过 LFN)和 `attr & 0x08`(跳过卷标)。
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3. d:\Code\Deshab\CODE\UTSM\kernel\dsk_loader.c:L345-L392
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— `fat32_find_in_dir()` 实现:支持从指定起始 cluster 开始遍历目录簇链,按 8.3 名称查找文件或子目录,并跟随 FAT 链;同样跳过 `attr == 0x0F` LFN 条目。
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4. d:\Code\Deshab\CODE\UTSM\kernel\dsk_loader.c:L394-L438
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— `fat32_read_path()` 路径解析入口:按 `/` 拆分 8.3 路径组件,从根目录开始逐段查找;这是 DSK 侧实现“内存内文件查找”的主要逻辑。
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5. d:\Code\Deshab\CODE\tools\fat32_io.h:L1-L19
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— FAT32 库接口说明:明确能力为根目录文件读写删列举,限制为“仅根目录(不支持子目录)”,与 DSK 侧 `fat32_find_in_dir` 的子目录遍历能力形成对比。
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6. d:\Code\Deshab\CODE\tools\fat32_io.h:L139-L158
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— `f32_find_in_root()` 实现:仅在根目录簇链中查找 11 字符名,过滤 `attr == 0x0F` LFN 和 `attr & 0x08` 卷标,返回匹配项 cluster 与大小。
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7. d:\Code\Deshab\CODE\tools\fat32_io.h:L160-L208
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— `f32_read_root_file()` 实现:通过根目录查找 + FAT 链跟随读取单文件内容;受库限制说明影响,仅支持根目录文件,不支持子目录路径 traversal。
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8. d:\Code\Deshab\CODE\DKM\fat32\fat32.c:L216-L258
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— DKM FAT32 驱动入口:读取 root dir 并遍历目录项,显式 `if (dir[e].attr==0x0F) continue;` 跳过 LFN,只列出 8.3 文件并读取 `README.TXT` 内容。
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4 处 FAT32 代码全部只认 8.3、跳过 LFN。我需要确认 DSK 侧(deshab.elf)是否有独立的 FAT32 解析器(cmd.elf 读 PE 文件用),这影响 LFN 改动范围。
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现在我对全部 3 处 FAT32 代码(UTSM dsk_loader.c、DSK main.c、tools/fat32_io.h)都清楚了——全部只认 8.3、跳过 LFN。让我确认 UTSM 侧如何读取 FUCK 配置(决定 [compat] 段在哪解析),然后启动 Plan agent 设计详细方案。
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完整图景已清晰:UTSM 侧 [main.c](file:///d:/Code/Deshab/CODE/UTSM/kernel/main.c) 的 `utsm_load_fuck_config` 读 FUCK,`utsm_apply_config` 应用配置。现在启动 Plan agent 设计详细实现方案。
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让我先深入探索关键代码文件,确认当前实现的细节,然后设计实施计划。
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现在我来检查 Linux 端的守护进程代码和 `fat32 DKM driver`。
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现在我已充分理解所有关键代码。让我制定详细的实施计划。
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---
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# SYSTEM/lib/ 统一动态库搜索路径实施计划
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## 总体架构概述
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本计划涉及三个兼容层集成目标:(1) FAT32 LFN 长文件名解析,(2) PE 真实 DLL 加载,(3) Linux 启动时 .so 推送。这三者有明确的依赖链:LFN 是基础(库文件有长名如 `libstd-6g.so`),PE DLL 加载和 Linux .so 推送都依赖 LFN 才能从 SYSTEM/lib/ 读出文件。
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---
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## Part 1: LFN 长文件名支持
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### 1.1 设计决策:共享头文件方案
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创建 `CODE/tools/fat32_lfn.h` 作为 static inline 共享库,与现有 `fat32_io.h` 同模式。理由:
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- 三个 FAT32 实现位置(UTSM dsk_loader.c、DSK main.c、tools/fat32_io.h)各有独立缓冲区和 block I/O 接口,无法抽取为单一共享实现
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- LFN 解析逻辑是纯算法,无状态依赖,适合 static inline 函数
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- 各调用点在遍历目录项时调用 LFN 收集函数,收集结果与短条目匹配
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### 1.2 LFN 数据结构与核心算法
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**LFN 目录项布局**(attr=0x0F):
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```
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偏移 大小 含义
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0 1 序号(bit6=最后一片段, bit5=0x40)
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1-10 10 name1 (5 个 UTF-16 LE 字符)
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11 1 attr (0x0F)
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12 1 type (0)
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13 1 checksum
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14-25 12 name2 (6 个 UTF-16 LE 字符)
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26 2 首簇号 (必须为 0)
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28-31 4 name3 (2 个 UTF-16 LE 字符)
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```
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每个 LFN 项携带 13 个 UTF-16 LE 字符。多项按**逆序**存储(最高序号最先出现),紧接其后的短名项是此 LFN 链所对应的 8.3 条目。
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**fat32_lfn.h 核心接口**:
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```c
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// LFN 最大长度(FAT32 规范最多 20 个 LFN 项 = 260 字符)
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#define FAT32_LFN_MAX 256
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// LFN 收集缓冲(栈分配即可,调用方局部变量)
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typedef struct {
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u16 chars[FAT32_LFN_MAX]; // UTF-16 LE 累积字符
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int count; // 已收集字符数
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int seq_expected; // 期望的下一个序号(逆序收集用)
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u8 checksum; // 校验和(来自首个 LFN 项)
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int valid; // 1=LFN 链完整有效
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} fat32_lfn_buf;
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// 初始化 LFN 缓冲
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static inline void fat32_lfn_init(fat32_lfn_buf *buf);
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// 处理一个目录项:如果 attr==0x0F,收集 LFN 片段;
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// 如果是短名项,校验 checksum 并确认匹配。
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// 返回:1=此短名项有完整 LFN,0=无 LFN 或 LFN 不完整
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static inline int fat32_lfn_process(fat32_lfn_buf *buf,
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const void *entry32, // 32 字节目录项
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int is_lfn_entry); // attr==0x0F ?
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// 从 LFN 缓冲提取 ASCII 名(UTF-16→ASCII 缩窄,仅处理 BMP U+0000..U+007F)
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// 返回 NUL 结尾 ASCII 字符串长度,-1 表示含非 ASCII 字符
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static inline int fat32_lfn_to_ascii(const fat32_lfn_buf *buf,
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char *out, int out_cap);
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// 计算 8.3 短名的 LFN checksum
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static inline u8 fat32_lfn_checksum(const char name11[11]);
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// 用长名或 8.3 短名匹配目标
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// 返回:1 匹配(LFN 优先),0 不匹配
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static inline int fat32_lfn_match(const fat32_lfn_buf *buf,
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const char name11[11],
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const char *target_long, // ASCII 长名(可为 NULL)
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const char *target83); // 8.3 短名(可为 NULL)
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```
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**LFN 收集算法**(`fat32_lfn_process`):
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1. 如果 `is_lfn_entry`:读取序号 `seq = entry[0] & 0x3F`
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- 如果 `entry[0] & 0x40`:这是最后一个 LFN 片段(逻辑上最前面的),设置 `buf->seq_expected = seq`,`buf->count = 0`
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- 从 entry 偏移 1-10/14-25/28-31 提取 13 个 UTF-16 LE 字符
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- 将字符写入 `buf->chars[(seq-1)*13 .. seq*13-1]`(逆序存储但正序放置)
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- 保存 `buf->checksum = entry[13]`
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- 清除 `buf->valid`(等短名项校验)
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2. 如果是短名项:
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- 计算 `name11` 的 checksum,与 `buf->checksum` 比较
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- 匹配则设 `buf->valid = 1`
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- 不匹配则 `buf->valid = 0`,清空缓冲
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**关键约束**:LFN 收集在目录遍历循环中进行——每当遇到 `attr==0x0F` 的条目,调用 `fat32_lfn_process` 收集;遇到短名条目时,`fat32_lfn_process` 做校验收尾。这意味着每个调用点(`fat32_find_in_dir` 等)的遍历循环需要改造,不再 `continue` 跳过 `attr==0x0F`,而是传入 LFN 收集器。
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### 1.3 各 FAT32 实现点的修改
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**A. CODE/tools/fat32_io.h(linux_compat 使用的共享库)**
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修改 `f32_find_in_root`(L142):在目录遍历循环中增加 `fat32_lfn_buf` 局部变量,对每个 `attr==0x0F` 条目调用 `fat32_lfn_process`,对短名条目用 `fat32_lfn_match` 同时匹配 LFN 和 8.3 名。
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修改 `f32_list_root`(L439)和 `f32_list_dir`(L489):回调时传递 LFN 名称(如有),否则传 8.3 名。
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新增函数:
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```c
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// 在指定目录簇中按长名查找(返回簇号和大小)
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static inline int f32_find_in_dir_lfn(u32 dir_clus, const char *long_name,
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u32 *out_clus, u32 *out_size);
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// 列举指定目录簇的内容,回调包含长名
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typedef int (*f32_list_lfn_cb)(const char *lfn_name, const char *short_name,
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u32 size, u8 attr, void *user_data);
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static inline int f32_list_dir_lfn(u32 dir_clus, f32_list_lfn_cb emit, void *user_data);
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```
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**B. CODE/UTSM/kernel/dsk_loader.c(UTSM 侧 FAT32)**
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修改 `fat32_find_in_dir`(L350):
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- 增加参数 `const char *long_name`(可为 NULL,NULL 时仅匹配 8.3)
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- 内部遍历循环加入 LFN 收集逻辑
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- 当 `long_name != NULL` 时,用 `fat32_lfn_match` 匹配长名
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修改 `fat32_read_path`(L399):
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- 当前路径组件提取逻辑(L422-433)补空格到 11 字符
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- 新增:如果组件长度 > 8(不含扩展名)或包含小写,尝试 LFN 匹配
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- 路径组件不再只构造 11 字符 8.3 名,而是同时保留原始字符串作为长名
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- 中间级(子目录)查找和末级(文件)查找都调用改造后的 `fat32_find_in_dir`
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**C. CODE/dsk/main.c(DSK 侧 FAT32)**
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与 UTSM 侧对称修改:
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- `fat32_find_in_dir`(L235)增加长名参数
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- `fat32_read_path`(L273)支持长名路径组件
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- `fat32_find_entry`(L509)增加 LFN 收集
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### 1.4 UTF-16 到 ASCII 缩窄
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库文件名(.so/.dll)全部是 ASCII 字符。`fat32_lfn_to_ascii` 只需将 UTF-16 LE 中的 U+0000..U+007F 直接取低字节,超出范围返回 -1。调用方处理策略:非 ASCII 名跳过(记日志),因为系统库不使用非 ASCII 名。
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### 1.5 路径遍历设计
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`fat32_read_path` 当前期望 8.3 路径如 `"SYSTEM /DESHAB64 /FUCK "`。改造后:
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- 新路径格式:原始路径如 `"SYSTEM/lib/libstd-6g.so"`
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- 路径分割按 '/' 分隔,每个组件保留原始字符串(可能 > 8.3)
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- 查找时:先用 8.3 短名快速匹配,若失败则走 LFN 匹配
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- 向后兼容:如果调用方仍传入 8.3 格式路径,行为不变(8.3 匹配必然成功)
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---
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## Part 2: PE 真实 DLL 加载
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### 2.1 DLL 解析器回调机制
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**推荐方案:全局解析器注册函数**(不修改 pe_service 结构体 ABI)
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理由:
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- `pe_service` 结构体通过 `dsk_boot_context.reserved[4]` 传递给 DSK/cmd.elf,已有二进制 ABI 约束
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- 增加函数指针会破坏现有 cmd.elf 的兼容性
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- 全局注册模式与 `pe_shim_init`、`pe_shim_set_emu_base` 等已有全局状态一致
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新增文件 `CODE/UTSM/pe/pe_dll_manager.h` 和 `CODE/UTSM/pe/pe_dll_manager.c`:
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```c
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/* pe_dll_manager.h — PE DLL 管理器(缓存 + 导出表解析) */
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/* DLL 文件读取回调:从 FAT32 读取 DLL 文件到内存
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* name: DLL 文件名(如 "user32.dll")
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* out_data/out_size: 返回数据指针和大小
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* 返回 0 成功,负值失败 */
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typedef int (*pe_dll_reader_fn)(const char *name, u8 **out_data, u32 *out_size);
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/* 初始化 DLL 管理器,注册文件读取回调 */
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void pe_dll_manager_init(pe_dll_reader_fn reader);
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/* 加载 DLL:从 SYSTEM/lib/ 读取 → pe_load_image → 解析导出表
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* 已加载则返回缓存的 image_base
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* 返回 0 成功,负值失败 */
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int pe_dll_load(const char *dll_name, u64 *out_base);
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/* 从已加载 DLL 中按名称解析导出函数
|
||
* 返回 函数绝对地址,0 未找到 */
|
||
u64 pe_dll_resolve(const char *dll_name, const char *func_name);
|
||
|
||
/* 从已加载 DLL 中按序号解析导出函数
|
||
* 返回 函数绝对地址,0 未找到 */
|
||
u64 pe_dll_resolve_ordinal(const char *dll_name, u32 ordinal);
|
||
```
|
||
|
||
### 2.2 DLL 缓存与导出表解析
|
||
|
||
**缓存结构**:
|
||
```c
|
||
#define PE_DLL_CACHE_MAX 32
|
||
|
||
typedef struct {
|
||
char name[64]; // DLL 文件名(小写,如 "user32.dll")
|
||
u64 image_base; // pe_load_image 返回的基址
|
||
u64 image_size; // SizeOfImage
|
||
u32 export_dir_rva; // 导出表 RVA(0=无导出)
|
||
u32 export_dir_size;
|
||
int is_pe32_plus; // 影响地址宽度
|
||
int load_ok;
|
||
} pe_dll_entry;
|
||
|
||
static pe_dll_entry g_dll_cache[PE_DLL_CACHE_MAX];
|
||
static int g_dll_count;
|
||
static pe_dll_reader_fn g_dll_reader;
|
||
```
|
||
|
||
**导出表解析算法**(`pe_dll_resolve`):
|
||
|
||
```
|
||
IMAGE_EXPORT_DIRECTORY 结构(位于 DLL image 的 export_dir_rva 处):
|
||
+0x00 Characteristics
|
||
+0x04 TimeDateStamp
|
||
+0x08 MajorVersion / MinorVersion
|
||
+0x0C Name RVA (DLL 名字符串)
|
||
+0x10 Base (ordinal 基数,通常为 1)
|
||
+0x14 NumberOfFunctions
|
||
+0x18 NumberOfNames
|
||
+0x1C AddressOfFunctions (EAT, RVA 数组)
|
||
+0x20 AddressOfNames (ENT, RVA 数组)
|
||
+0x24 AddressOfNameOrdinals (序号数组)
|
||
|
||
按名称查找:
|
||
1. 二分搜索 ENT[i](NumberOfNames 项,按字母序排列)
|
||
2. 命中 → AddressOfNameOrdinals[i] = EAT_index
|
||
3. EAT[EAT_index] = func_rva
|
||
4. 如果 func_rva 在 [export_dir_rva, export_dir_rva+export_dir_size) 范围内:
|
||
→ 这是转发导出(forwarder string),格式 "DLLNAME.FuncName" 或 "DLLNAME.#ordinal"
|
||
5. 否则返回 image_base + func_rva
|
||
```
|
||
|
||
**二分搜索实现**(freestanding C,无 strcmp/memcmp 标准库):
|
||
- 内联 `my_strcasecmp` 进行 DLL 内函数名比较(PE 导出表按大小写敏感排序,但安全起见做精确比较)
|
||
- ENT 条目是 RVA,需要 `image_base + RVA` 读取函数名字符串
|
||
|
||
### 2.3 resolve_imports 改造
|
||
|
||
修改 `CODE/UTSM/pe/pe_loader.c` 中的 `resolve_imports` 函数:
|
||
|
||
```c
|
||
// 当前逻辑(L216-229):
|
||
int shim_idx = pe_shim_lookup(dll_name, func_name);
|
||
if (shim_idx >= 0) {
|
||
// 填 shim 地址
|
||
} else {
|
||
fn_addr = pe_shim_unimpl_stub(); // ← 改造点
|
||
}
|
||
|
||
// 改造后逻辑:
|
||
int shim_idx = pe_shim_lookup(dll_name, func_name);
|
||
if (shim_idx >= 0) {
|
||
// 填 shim 地址(不变)
|
||
} else {
|
||
// 尝试 DLL 管理器解析
|
||
u64 real_addr = pe_dll_resolve(dll_name, func_name);
|
||
if (real_addr != 0) {
|
||
// PE32+: 填真实 64 位地址
|
||
if (is_pe32_plus) {
|
||
*(u64 *)iat_ptr = real_addr;
|
||
} else {
|
||
// PE32 解释器路径:填合成地址
|
||
// 问题:32 位解释器不能直接调用 64 位 DLL 代码
|
||
// 解决:仍填 unimpl stub,但记录映射关系
|
||
// 或者:如果 DLL 也是 32 位,可以填真实地址
|
||
// 当前保守策略:PE32 仍走 shim/synthetic,不加载真实 DLL
|
||
*(u32 *)iat_ptr = PE_SHIM_UNIMPL;
|
||
}
|
||
} else {
|
||
fn_addr = pe_shim_unimpl_stub(); // 最终兜底
|
||
}
|
||
}
|
||
```
|
||
|
||
**PE32(32位解释器)DLL 策略**:
|
||
|
||
PE32 通过 x86emu32 解释执行。解释器的 CALL 拦截机制基于合成地址(0x00010000 | shim_idx)。真实 DLL 的导出函数是 64 位原生代码,32 位解释器无法直接调用。
|
||
|
||
方案:
|
||
- PE32 路径下,DLL 导入仍优先走 shim 表
|
||
- 如果 shim 未命中且 `pe_dll_resolve` 找到真实导出,将导出地址注册为 32 位 shim 的 fn64 回退
|
||
- 这要求新增一个动态 shim 注册机制(扩展 IAT 表)
|
||
|
||
**简化方案(推荐首期实现)**:PE32 路径不加载真实 DLL,只对 PE32+(64 位原生)启用真实 DLL 加载。理由:Deaicup PE 版本是 PE32+(64 位 Rust),当前唯一的 PE32 程序是 hello32.exe(仅导入 kernel32/msvcrt,全部已有 shim)。
|
||
|
||
### 2.4 递归 DLL 依赖与循环检测
|
||
|
||
DLL 自身也有导入表。`pe_dll_load` 加载 DLL 后需递归解析其导入:
|
||
|
||
```c
|
||
int pe_dll_load(const char *dll_name, u64 *out_base) {
|
||
// 1. 检查缓存
|
||
pe_dll_entry *cached = find_in_cache(dll_name);
|
||
if (cached && cached->load_ok) {
|
||
*out_base = cached->image_base;
|
||
return 0;
|
||
}
|
||
|
||
// 2. 读取 DLL 文件
|
||
u8 *data; u32 size;
|
||
if (g_dll_reader(dll_name, &data, &size) != 0) return -1;
|
||
|
||
// 3. pe_load_image 加载(此步骤内部会调用 resolve_imports)
|
||
// 但 resolve_imports 又可能调用 pe_dll_load → 递归
|
||
pe_image_info info;
|
||
int rc = pe_load_image(data, size, &info);
|
||
if (rc != 0) return -2;
|
||
|
||
// 4. 缓存
|
||
add_to_cache(dll_name, &info, ...);
|
||
|
||
*out_base = info.image_base;
|
||
return 0;
|
||
}
|
||
```
|
||
|
||
**循环检测**:在 `pe_dll_load` 入口设置 "正在加载" 状态:
|
||
|
||
```c
|
||
typedef enum { DLL_NONE, DLL_LOADING, DLL_LOADED } dll_state;
|
||
|
||
typedef struct {
|
||
char name[64];
|
||
u64 image_base;
|
||
dll_state state; // ← 新增
|
||
// ...
|
||
} pe_dll_entry;
|
||
```
|
||
|
||
当递归遇到 `state == DLL_LOADING` 时,说明检测到循环依赖,记日志并返回 -1(该 DLL 导入未解析,填 unimpl stub)。这是安全的降级策略。
|
||
|
||
### 2.5 转发导出(Forwarder Exports)
|
||
|
||
当 `EAT[index]` 返回的 RVA 落在导出目录范围内时,该 RVA 指向一个 ASCII 字符串,格式为 `"NTDLL.RtlAllocateHeap"` 或 `"NTDLL.#123"`。
|
||
|
||
**首期处理**:记日志,填 unimpl stub。理由:转发导出主要出现在系统 DLL 之间的内部转发(如 kernel32→ntdll),而系统 DLL 已由 shim 覆盖。真实加载的 DLL(如 Rust 编译的第三方 DLL)极少使用转发导出。
|
||
|
||
**后期扩展**:解析转发字符串,递归加载目标 DLL 并解析。
|
||
|
||
### 2.6 DLL 文件读取回调实现
|
||
|
||
DLL 文件读取回调需要从 FAT32 的 `SYSTEM/lib/` 子目录读取 DLL 文件。实现位于 `CODE/UTSM/pe/pe_dll_manager.c`:
|
||
|
||
```c
|
||
// 使用 UTSM 侧 dsk_loader.c 的 fat32_read_path 读取 DLL
|
||
// fat32_read_path 已支持子目录遍历
|
||
extern int fat32_read_path(const char *path, u8 **out_data, u32 *out_size);
|
||
|
||
static int dll_reader_from_fat32(const char *name, u8 **out_data, u32 *out_size) {
|
||
// 构造完整路径: "SYSTEM/lib/" + name
|
||
// 用 fat32_read_path 读取(需支持 LFN)
|
||
char path[128];
|
||
// 拷贝 "SYSTEM/lib/" + name(LFN 路径)
|
||
// 调用 fat32_read_path(path, out_data, out_size)
|
||
return fat32_read_path(path, out_data, out_size);
|
||
}
|
||
```
|
||
|
||
### 2.7 初始化时序
|
||
|
||
`pe_dll_manager_init(dll_reader_from_fat32)` 在 `dsk_load_and_jump` 之前、block API 可用之后调用。具体在 `CODE/UTSM/kernel/main.c` 的 `kernel_main` 中,在 DKM 驱动加载完成(block provider 注册)后、`dsk_load_and_jump` 之前。
|
||
|
||
---
|
||
|
||
## Part 3: Linux 启动时 .so 推送
|
||
|
||
### 3.1 设计概览
|
||
|
||
在 Linux guest 成功 park 后、DSK 加载前,将 `SYSTEM/lib/*.so` 全部推送到 Linux guest 的 `/usr/lib/deshab/` 目录,并设置 `LD_LIBRARY_PATH`。
|
||
|
||
### 3.2 新增函数
|
||
|
||
**CODE/UTSM/vmm/linux_compat.c** 中新增:
|
||
|
||
```c
|
||
// 将 SYSTEM/lib/ 目录下所有 .so 文件推送到 Linux guest
|
||
// 调用时机:linux_compat_init 成功后
|
||
int lxc_sync_lib_dir(void);
|
||
```
|
||
|
||
**实现逻辑**:
|
||
|
||
1. 确保 FAT32 block API 可用(`lxc_f32_ensure`)
|
||
2. 读取 FAT32 BPB(`f32_disk_load`)
|
||
3. 找到 `SYSTEM/lib/` 目录的簇号(遍历 `SYSTEM` → `lib`,使用 LFN)
|
||
4. 枚举该目录下所有文件(新函数 `f32_list_dir_lfn`)
|
||
5. 对每个 `.so` 文件:
|
||
a. 读取文件内容到暂存缓冲
|
||
b. 推送到 Linux guest `/usr/lib/deshab/<filename>`
|
||
6. 在 Linux daemon 中设置 `LD_LIBRARY_PATH`
|
||
|
||
### 3.3 目录枚举功能
|
||
|
||
当前 `fat32_io.h` 的 `f32_list_dir` 只返回 8.3 名。需新增 LFN 枚举变体:
|
||
|
||
```c
|
||
// 带长名的目录枚举回调
|
||
typedef int (*f32_list_lfn_cb)(const char *lfn, // 长名(ASCII,可能为空串)
|
||
const char *short83, // 8.3 名
|
||
u32 size, u8 attr,
|
||
void *user_data);
|
||
```
|
||
|
||
在 `f32_list_dir_lfn` 内部遍历时,LFN 条目收集到 `fat32_lfn_buf`,短名条目回调时同时传递长名和短名。
|
||
|
||
### 3.4 内存中的文件推送
|
||
|
||
当前 `lxc_file_push` 只能从 FAT32 根目录读取。需要新增从内存数据直接推送的函数:
|
||
|
||
```c
|
||
// 将内存中的数据推送到 Linux 文件
|
||
// 功能与 lxc_file_push 类似,但数据源是内存而非 FAT32
|
||
static int lxc_file_push_mem(const char *linux_path,
|
||
const u8 *data, u32 size,
|
||
u64 *out_size);
|
||
```
|
||
|
||
实现:将数据按 payload_pool 容量分块写入 Linux guest,首块 offset=0 触发 O_TRUNC。
|
||
|
||
### 3.5 lxc_sync_lib_dir 详细流程
|
||
|
||
```c
|
||
int lxc_sync_lib_dir(void) {
|
||
if (!lxc_is_available()) return -1;
|
||
|
||
// 1. 确保 FAT32 可用
|
||
int rc = lxc_f32_ensure();
|
||
if (rc != 0) return rc;
|
||
|
||
// 2. 重新加载 BPB
|
||
if (f32_disk_load() != 0) return -2;
|
||
|
||
// 3. 找到 SYSTEM/lib/ 簇号
|
||
// 先找 "SYSTEM" 子目录(8.3),再找 "lib" 子目录(LFN)
|
||
u32 system_clus = 0, lib_clus = 0;
|
||
// 使用 f32_find_in_dir_lfn 遍历
|
||
// ...
|
||
|
||
// 4. 枚举 lib/ 目录
|
||
// 使用 f32_list_dir_lfn,收集 .so 文件信息
|
||
typedef struct { char name[256]; u32 clus; u32 size; } so_file;
|
||
so_file so_list[64];
|
||
int so_count = 0;
|
||
// 回调中过滤 *.so 后缀
|
||
|
||
// 5. 确保目标目录存在
|
||
// lxc_file_write("/usr/lib/deshab/.keep", 0, 0, ...) 创建目录(Linux 自动创建父目录)
|
||
|
||
// 6. 逐文件推送
|
||
for (int i = 0; i < so_count; i++) {
|
||
u8 *data; u32 size;
|
||
// 读取文件:f32_read_file_by_clus
|
||
// 推送:lxc_file_push_mem
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
```
|
||
|
||
**大小限制**:当前 `f32_data` 缓冲为 256KB(fat32_io.h 默认),单文件最大 256KB。.so 文件可能更大(libstd-6g.so 可能数 MB)。需要:
|
||
- 为 `lxc_sync_lib_dir` 增大暂存缓冲(`#define F32_DATA_BYTES` 在 include 前覆盖)
|
||
- 或采用流式推送(读一簇推一簇),避免全量缓冲
|
||
|
||
**推荐:流式推送方案**——读一个簇的数据就立即通过 `lxc_file_write` 推送到 Linux,循环推进 offset。这需要一个新的辅助函数:
|
||
|
||
```c
|
||
// 从 FAT32 文件按簇流式推送到 Linux
|
||
// 不需要全量缓冲,每簇 4KB 直接写 IPC
|
||
static int lxc_push_fat32_file_streaming(u32 first_clus, u32 file_size,
|
||
const char *linux_path);
|
||
```
|
||
|
||
### 3.6 Daemon 侧 LD_LIBRARY_PATH 设置
|
||
|
||
修改 `CODE/linux/initramfs/bin/utsm_exec_daemon.c` 的 `handle_exec_request`:
|
||
|
||
在 fork 后、execv 前的子进程中:
|
||
|
||
```c
|
||
if (pid == 0) {
|
||
// 子进程
|
||
close(pipefd[0]);
|
||
dup2(pipefd[1], STDOUT_FILENO);
|
||
dup2(pipefd[1], STDERR_FILENO);
|
||
close(pipefd[1]);
|
||
|
||
// 新增:设置 LD_LIBRARY_PATH
|
||
setenv("LD_LIBRARY_PATH", "/usr/lib/deshab", 1);
|
||
|
||
execv(req->path, argv);
|
||
// ...
|
||
}
|
||
```
|
||
|
||
`setenv` 是 POSIX 标准函数,musl/glibc 均支持。在子进程 fork 后调用是安全的。
|
||
|
||
### 3.7 调用时机
|
||
|
||
`lxc_sync_lib_dir` 在 `linux_compat_init` 之后立即调用:
|
||
|
||
```c
|
||
// CODE/UTSM/kernel/main.c
|
||
if (lin_st == 0) {
|
||
log_info("[UTSM] Linux guest parked (daemon ready)");
|
||
linux_compat_init();
|
||
// 新增:同步 lib 目录
|
||
if (lxc_sync_lib_dir() == 0) {
|
||
log_info("[UTSM] lib sync to Linux guest ok");
|
||
} else {
|
||
log_warn("[UTSM] lib sync to Linux guest failed (non-fatal)");
|
||
}
|
||
}
|
||
```
|
||
|
||
---
|
||
|
||
## Part 4: FUCK [compat] 配置区
|
||
|
||
### 4.1 新增配置键
|
||
|
||
在 `SYSTEM/system/deshab64/FUCK` 中新增 `[compat]` 区:
|
||
|
||
```ini
|
||
[compat]
|
||
lib_path = LIB
|
||
linux_lib_guest_path = /usr/lib/deshab
|
||
linux_lib_sync = 1
|
||
pe_dll_search = 1
|
||
```
|
||
|
||
各键含义:
|
||
- `lib_path`:FAT32 上 SYSTEM/ 下的子目录名(默认 "LIB",8.3 格式兼容)
|
||
- `linux_lib_guest_path`:Linux guest 内的库目录路径
|
||
- `linux_lib_sync`:是否在启动时推送 .so 到 Linux guest(0/1)
|
||
- `pe_dll_search`:是否启用 PE 真实 DLL 加载(0/1)
|
||
|
||
### 4.2 UTSM 侧应用
|
||
|
||
在 `CODE/UTSM/kernel/main.c` 中增加全局变量和配置应用:
|
||
|
||
```c
|
||
/* compat 配置全局变量 */
|
||
char g_compat_lib_path[32] = "LIB";
|
||
char g_compat_linux_guest_path[64] = "/usr/lib/deshab";
|
||
int g_compat_linux_lib_sync = 1;
|
||
int g_compat_pe_dll_search = 1;
|
||
|
||
static void utsm_apply_compat_config(const ini_config *cfg) {
|
||
if (!cfg) return;
|
||
const char *v;
|
||
v = ini_get(cfg, "compat", "lib_path");
|
||
if (v) { /* 复制到 g_compat_lib_path, 8.3 转换 */ }
|
||
v = ini_get(cfg, "compat", "linux_lib_guest_path");
|
||
if (v) { /* 复制到 g_compat_linux_guest_path */ }
|
||
g_compat_linux_lib_sync = ini_get_bool(cfg, "compat", "linux_lib_sync", 1);
|
||
g_compat_pe_dll_search = ini_get_bool(cfg, "compat", "pe_dll_search", 1);
|
||
}
|
||
```
|
||
|
||
在 `utsm_apply_config` 末尾调用 `utsm_apply_compat_config`。
|
||
|
||
`pe_dll_manager_init` 读取 `g_compat_pe_dll_search` 决定是否启用 DLL 搜索。
|
||
`lxc_sync_lib_dir` 读取 `g_compat_linux_lib_sync` 和 `g_compat_lib_path` 决定推送行为。
|
||
|
||
### 4.3 DSK 侧应用
|
||
|
||
在 `CODE/dsk/main.c` 的 `dsk_spinner_and_check` 中,FUCK 配置解析后读取 `[compat]` 区:
|
||
|
||
```c
|
||
int pe_dll_search = dsk_cfg_ok ? dsk_ini_get_bool(&dsk_cfg, "compat", "pe_dll_search", 1) : 1;
|
||
```
|
||
|
||
DSK 通过 `pe_service` 调用 PE 加载时,DLL 搜索功能已在 UTSM 侧的 `pe_dll_manager` 中实现,DSK 无需关心细节。
|
||
|
||
---
|
||
|
||
## Part 5: 分阶段实施顺序
|
||
|
||
### Phase 1: LFN 基础设施(最高优先级,其他所有功能的前置依赖)
|
||
|
||
**修改文件**:
|
||
1. `CODE/tools/fat32_lfn.h` — 新建,LFN 收集/匹配/转换 inline 函数
|
||
2. `CODE/tools/fat32_io.h` — `f32_find_in_root`、`f32_list_root`、`f32_list_dir` 增加 LFN 支持;新增 `f32_find_in_dir_lfn`、`f32_list_dir_lfn`
|
||
3. `CODE/UTSM/kernel/dsk_loader.c` — `fat32_find_in_dir`、`fat32_read_path` 支持 LFN
|
||
4. `CODE/dsk/main.c` — 同 UTSM 侧对称修改
|
||
|
||
**验证**:在 `SYSTEM/lib/` 放置一个长名文件(如 `test-lfn-file.txt`),通过 `fat32_read_path("SYSTEM/lib/test-lfn-file.txt")` 验证读取。
|
||
|
||
**预估工作量**:fat32_lfn.h 约 200 行;fat32_io.h 修改约 100 行;dsk_loader.c 修改约 60 行;dsk/main.c 修改约 60 行。
|
||
|
||
### Phase 2: Linux .so 推送
|
||
|
||
**依赖**:Phase 1 完成(LFN 可读 SYSTEM/lib/ 下的 .so 文件)
|
||
|
||
**修改文件**:
|
||
1. `CODE/UTSM/vmm/linux_compat.c` — 新增 `lxc_sync_lib_dir`、`lxc_file_push_mem`、`lxc_push_fat32_file_streaming`
|
||
2. `CODE/linux/initramfs/bin/utsm_exec_daemon.c` — fork 后 setenv LD_LIBRARY_PATH
|
||
3. `CODE/UTSM/kernel/main.c` — linux_compat_init 后调用 lxc_sync_lib_dir
|
||
|
||
**验证**:在 `SYSTEM/lib/` 放置一个测试 .so 文件,启动后通过 Linux compat 执行 `ls /usr/lib/deshab/` 和 `LD_LIBRARY_PATH=/usr/lib/deshab ldconfig -p` 验证。
|
||
|
||
### Phase 3: PE 真实 DLL 加载
|
||
|
||
**依赖**:Phase 1 完成(LFN 可读 SYSTEM/lib/ 下的 .dll 文件)
|
||
|
||
**修改文件**:
|
||
1. `CODE/UTSM/pe/pe_dll_manager.h` — 新建
|
||
2. `CODE/UTSM/pe/pe_dll_manager.c` — 新建,DLL 缓存 + 导出表解析 + 递归加载
|
||
3. `CODE/UTSM/pe/pe_loader.c` — `resolve_imports` 改造:shim miss 后尝试 DLL 管理器
|
||
4. `CODE/UTSM/pe/pe_loader.h` — 新增 IMAGE_EXPORT_DIRECTORY 结构体定义
|
||
5. `CODE/UTSM/kernel/main.c` — DKM 加载后初始化 pe_dll_manager
|
||
6. `CODE/UTSM/pe/pe_service.c` — pe_service_run 前确保 DLL 管理器已初始化
|
||
|
||
**验证**:
|
||
1. 编写一个最小 DLL(C,导出一个 `add(int, int)` 函数),放入 `SYSTEM/lib/`
|
||
2. 编写一个 PE32+ EXE 导入该 DLL,运行验证 IAT 填充为真实导出地址
|
||
3. 验证 Deaicup PE 版本加载(它导入的 user32/gdi32/kernel32 全在 shim 中,不会触发真实 DLL 加载——但如果 Deaicup 额外依赖了非系统 DLL,则会走新路径)
|
||
|
||
### Phase 4: FUCK [compat] 配置区
|
||
|
||
**依赖**:Phase 2 和 Phase 3 基本功能完成后
|
||
|
||
**修改文件**:
|
||
1. `CODE/UTSM/kernel/main.c` — 新增 `utsm_apply_compat_config`、全局变量
|
||
2. `CODE/dsk/main.c` — 读取 [compat] 键
|
||
3. `SYSTEM/system/deshab64/FUCK` — 新增 [compat] 区
|
||
|
||
**验证**:设置 `linux_lib_sync=0` 后确认 .so 不再推送;设置 `pe_dll_search=0` 后确认 DLL 不再从磁盘加载。
|
||
|
||
---
|
||
|
||
## 风险与边界情况
|
||
|
||
1. **LFN 校验和不匹配**:Windows 在创建 LFN 条目时计算短名 checksum。如果磁盘上的 LFN 条目损坏(checksum 不匹配),`fat32_lfn_process` 应标记 LFN 无效,回退到 8.3 匹配。
|
||
|
||
2. **目录跨簇 LFN 链**:LFN 链可能跨越两个簇的边界。当前的簇遍历逻辑(读一簇遍历后跟随 FAT 链读下一簇)需要确保 LFN 缓冲在跨簇时不被清空——`fat32_lfn_buf` 应在整个目录遍历期间持续存在。
|
||
|
||
3. **DLL 递归深度**:设置最大递归深度 16 层。超过后填 unimpl stub 并记日志。
|
||
|
||
4. **内存消耗**:每个加载的 DLL 使用 `kmem_alloc_aligned` 分配 SizeOfImage 字节(arena 分配器,不释放)。需在 `g_dll_cache` 中限制最大加载数量(32 个)。
|
||
|
||
5. **PE32 路径 DLL 限制**:32 位解释器不能调用 64 位 DLL 代码。首期 PE32 路径禁用真实 DLL 加载。如果未来需要 32 位 DLL 支持,需为 x86emu32 增加一个"跳板"机制。
|
||
|
||
6. **大 .so 文件**:`libstd-6g.so` 可能超过 10MB。流式推送方案必须实现,不能用 256KB 缓冲。IPC payload pool 约 1MB,分块推送即可。
|
||
|
||
7. **SYSTEM/lib/ 为空**:目录可能不存在或为空。所有逻辑必须容忍此情况,记日志但不报错。
|
||
|
||
8. **LFN 路径中大小写**:FAT32 LFN 是大小写保留但查找不区分大小写。`fat32_lfn_match` 应做大小写不敏感比较(仅 ASCII 范围)。
|
||
|
||
9. **DLL 名大小写**:PE import 中的 DLL 名大小写不敏感(如 `USER32.dll` 和 `user32.dll` 等价)。`pe_dll_load` 的缓存查找需做大小写不敏感匹配。
|
||
|
||
10. **FUCK 配置缺失**:没有 [compat] 区时所有默认值生效,行为与无配置时一致。
|
||
|
||
---
|
||
|
||
### Critical Files for Implementation
|
||
- `d:\Code\Deshab\CODE\tools\fat32_io.h` — 所有 FAT32 LFN 改造的参考基线和 linux_compat 的 FAT32 依赖
|
||
- `d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c` — resolve_imports 改造核心,DLL 管理器集成点
|
||
- `d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c` — lxc_sync_lib_dir 和 lxc_file_push_mem 实现位置
|
||
- `d:\Code\Deshab\CODE\UTSM\kernel\dsk_loader.c` — UTSM 侧 fat32_find_in_dir/fat32_read_path 的 LFN 改造
|
||
- `d:\Code\Deshab\CODE\dsk\main.c` — DSK 侧 fat32_find_in_dir/fat32_read_path 的 LFN 改造
|
||
|
||
Plan agent 给出了与我的分析高度一致的详细方案。现在我来整合所有信息,写出最终计划文件。
|
||
|
||
计划已写好。让我通知你审查。
|
||
|
||
计划已批准。这是一个 4 阶段的复杂任务,我先建立任务跟踪,然后从 Phase 1(LFN 基础设施)开始。首先需要读完整的 `fat32_io.h` 了解其类型约定和完整实现。
|
||
|
||
先读完整的 `fat32_io.h` 了解类型约定和目录遍历实现,确保 LFN 库与它正确集成。
|
||
|
||
现在我对 `fat32_io.h` 的类型约定(`u8/u16/u32` 由包含者提供,`f32_bpb`/`f32_dirent` 结构,`f32_r32`/`f32_neq11` 辅助函数)完全清楚了。开始创建 `fat32_lfn.h`。
|
||
|
||
`fat32_lfn.h` 创建完成。现在改造 `fat32_io.h`——增量新增 LFN 函数,保持现有 8.3 函数向后兼容。
|
||
|
||
I'll continue from where the work left off. Let me first check the current state of the files to understand what's been completed and what needs to be done next.
|
||
|
||
Let me check the SYSTEM/lib folder and the current state of key files.
|
||
|
||
Now I have a clear picture. `SYSTEM/lib` exists but is empty. `fat32_lfn.h` is complete. I need to continue Phase 1: integrating LFN support into the three FAT32 parsers. Let me set up the task tracking and read the UTSM dsk_loader.c structure.
|
||
|
||
Let me read the FAT32 functions in UTSM dsk_loader.c to understand the exact code to modify.
|
||
|
||
Now let me see the FAT32 types and helpers at the top of dsk_loader.c, and check the DSK main.c `fat32_find_entry` function.
|
||
|
||
Let me check the helper functions and types in dsk_loader.c.
|
||
|
||
Now I have full context. Let me implement Phase 1A: add LFN support to `fat32_io.h`. I'll add the `fat32_lfn.h` include and the new LFN-aware functions.
|
||
|
||
Now let me add the LFN-aware functions after `f32_read_file_by_clus`:
|
||
|
||
Phase 1A is done. Now let me update the todo and move to Phase 1B: UTSM dsk_loader.c LFN support.
|
||
|
||
Now let me modify UTSM dsk_loader.c. First, add the LFN include:
|
||
|
||
Now modify `fat32_find_in_dir` to add LFN support:
|
||
|
||
Now modify `fat32_read_path` to preserve the original path component as long name:
|
||
|
||
Let me verify there are no other callers of `fat32_find_in_dir` in dsk_loader.c that need updating:
|
||
|
||
Let me also check for any other directory traversal functions in dsk_loader.c and verify no other files call the changed functions:
|
||
|
||
Good - UTSM dsk_loader.c is self-contained. Phase 1B is done. Now let me move to Phase 1C: DSK main.c. Let me read the functions I need to modify.
|
||
|
||
Let me check where to add the LFN include in DSK main.c - it needs to be after the type definitions:
|
||
|
||
Now I'll add the LFN include right before the FAT32 BPB struct definition, and then modify the three functions. Let me do the include first:
|
||
|
||
Now modify `fat32_find_in_dir` in DSK main.c to add LFN support:
|
||
|
||
Now modify `fat32_read_path` in DSK main.c to preserve long name components:
|
||
|
||
Now modify `fat32_find_dir_cluster` to support LFN paths:
|
||
|
||
Let me verify all callers of `fat32_find_in_dir` in DSK main.c are updated:
|
||
|
||
All callers are updated. Phase 1C is done. Let me now verify the changes compile by running the build:
|
||
|
||
Build succeeded — Phase 1 LFN changes compile cleanly. Let me mark Phase 1 as complete and move to Phase 2.
|
||
|
||
Now let me study the linux_compat.c structure to understand the existing functions I'll build on:
|
||
|
||
### Relevant Code Snippets
|
||
1. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L1-L25
|
||
— File header documents the UTSM+Linux IPC architecture and includes `linux_compat.h`, `ipc_shm.h`, `log.h`, `block.h`, `ipc_proto.h`, and `fat32_io.h`.
|
||
|
||
2. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L50-L64
|
||
— `linux_compat_init()` sets `g_compat_ready` only when the Linux guest is parked and IPC shared memory is ready; `lxc_is_available()` checks the same condition.
|
||
|
||
3. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L205-L245
|
||
— Core synchronous IPC request/response helper for file operations: builds `ipc_file_request`, sends it via `ipc_shm_send()`, resumes Linux, then drains `UTSM_MSG_FILE_RESPONSE` from the ring.
|
||
|
||
4. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L303-L335
|
||
— `lxc_file_write()` implementation: copies caller data into the IPC payload pool, sends `UTSM_MSG_FILE_WRITE_REQUEST`, and maps Linux-side errors to return codes.
|
||
|
||
5. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L338-L377
|
||
— FAT32 library integration: `lxc_f32_ensure()` initializes `fat32_io` through `block_get_api()`, then `lxc_f32_read_file()` and `lxc_f32_write_file()` convert names to 8.3 and call `fat32_io` root-file functions.
|
||
|
||
6. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L383-L439
|
||
— Cross-kernel file sync functions: `lxc_file_pull()` reads Linux files in chunks and writes to FAT32; `lxc_file_push()` reads FAT32 root files and writes to Linux via `lxc_file_write()`.
|
||
|
||
7. d:\Code\Deshab\CODE\UTSM\include\utsm\linux_compat.h:L68-L95
|
||
— Public API declarations for `file_write()`, `file_pull()`, and `file_push()` with documented semantics, including chunked writes and FAT32-to-Linux push behavior.
|
||
|
||
8. d:\Code\Deshab\CODE\linux\initramfs\bin\utsm_exec_daemon.c:L107-L194
|
||
— Linux daemon `handle_exec_request()` implementation: parses `ipc_exec_request`, forks, redirects stdout/stderr, calls `execv()`, streams output back, and sends exit status.
|
||
|
||
9. d:\Code\Deshab\CODE\linux\initramfs\bin\utsm_exec_daemon.c:L251-L305
|
||
— Linux daemon directory listing handler: opens directory, enumerates entries with `readdir()`, formats output, writes to shared pool, and sends `FILE_RESPONSE`.
|
||
|
||
10. d:\Code\Deshab\CODE\linux\initramfs\bin\utsm_exec_daemon.c:L358-L420
|
||
— Linux daemon file write handler: validates pool offsets, opens/creates/truncates files, reads staged pool data, writes with `pwrite()`, and returns written bytes/total size.
|
||
|
||
Let me read the key functions in linux_compat.c to understand the exact patterns:
|
||
|
||
Let me read the linux_compat.h header to see where to add the new function declaration:
|
||
|
||
Now I have all the context needed. Let me implement Phase 2. First, add the declaration to `linux_compat.h`:
|
||
|
||
Now let me check what log functions are available before implementing:
|
||
|
||
Good, all log functions are available. Now let me implement the Phase 2 functions in `linux_compat.c`:
|
||
|
||
Phase 2 linux_compat.c is done. Now let me modify `utsm_exec_daemon.c` for Phase 2B. Let me check the includes first:
|
||
|
||
`stdlib.h` is already included. Now add the `setenv` call in the child process before `execv`:
|
||
|
||
Now let me update the todos and implement Phase 2C: call `lxc_sync_lib_dir()` in UTSM main.c:
|
||
|
||
I'll add the `lxc_sync_lib_dir()` call after `linux_compat_init()`:
|
||
|
||
Phase 2 is complete. Let me build to verify everything compiles:
|
||
|
||
Build succeeded with 2 minor warnings. Let me fix them:
|
||
|
||
Phase 2 is complete. Now let me move to Phase 3: PE DLL manager. Let me first study the PE loader code:
|
||
|
||
### Relevant Code Snippets
|
||
1. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c:L153-L260
|
||
— `resolve_imports()` implementation. It walks the PE import descriptor table, resolves DLL/function names, looks up each import in the shim table via `pe_shim_lookup()`, fills the IAT with shim addresses or unimplemented stubs, and logs missing imports.
|
||
|
||
2. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c:L262-L347
|
||
— `pe_load_image()` implementation. It parses NT headers, allocates `SizeOfImage` memory with `kmem_alloc_aligned()`, copies headers/sections, applies relocations, calls `resolve_imports()`, and fills `pe_image_info`.
|
||
|
||
3. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c:L58-L98
|
||
— PE32 vs PE32+ detection. `parse_nt_headers()` reads `OptionalHeader.Magic`, sets `out->is_pe32_plus`, and stores image base / size / entry point.
|
||
|
||
4. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c:L101-L151
|
||
— Relocation handling uses `is_pe32_plus` to apply `DIR64` relocations for PE32+ and `HIGHLOW` relocations for PE32.
|
||
|
||
5. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c:L186-L249
|
||
— Import resolution branches on `is_pe32_plus`: PE32+ reads 64-bit thunks and writes 64-bit IAT entries; PE32 reads 32-bit thunks, writes synthetic shim addresses, and records IAT entries for the 32-bit interpreter.
|
||
|
||
6. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c:L251-L257
|
||
— Behavior when shim lookup fails: logs `[PE] unimplemented import`, then serializes DLL name, `!`, function name, and newline.
|
||
|
||
7. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.c:L13-L19
|
||
— Includes used by `pe_loader.c`: `pe_loader.h`, `pe_shim.h`, `x86emu32.h`, `../include/utsm/pe.h`, and `<utsm/arena.h>` for `kmem_alloc_aligned`.
|
||
|
||
8. d:\Code\Deshab\CODE\UTSM\pe\pe_loader.h:L163-L183
|
||
— Public loader API and documentation: `pe_load_image()` allocates memory, maps sections, applies relocations, resolves imports, and returns success/failure.
|
||
|
||
Let me read the exact code of `resolve_imports` and `pe_load_image`:
|
||
|
||
Let me read the PE structures and headers:
|
||
|
||
Let me check the `rva_to_offset` function and how `pe_load_image` can be called for DLLs:
|
||
|
||
Now I have all the context. Let me create the PE DLL manager. First, the header:
|
||
|
||
Now create the implementation file:
|
||
|
||
Now let me modify `pe_loader.c` to include the DLL manager and modify `resolve_imports`. First, add the include:
|
||
|
||
Now modify the PE32+ import resolution branch to try the DLL manager after shim miss:
|
||
|
||
Now let me find and update the Makefile to include `pe_dll_manager.c`:
|
||
|
||
The Makefile uses `pe/*.c` wildcard — `pe_dll_manager.c` is automatically included. Now let me add the DLL manager initialization to UTSM main.c. Let me find where DKM drivers are loaded:
|
||
|
||
Now let me add the PE DLL manager include and initialization to main.c:
|
||
|
||
Let me verify the current state of the key files for Phase 4 implementation.
|
||
|
||
Let me check the current state of `linux_compat.c` for `lxc_sync_lib_dir` and the DSK side for config reading.
|
||
|
||
### Relevant Code Snippets
|
||
1. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L454-L475
|
||
— `lxc_file_push_mem` implementation: writes memory data to a Linux guest file through `lxc_file_write`, chunked by IPC payload capacity, with offset=0 truncation semantics.
|
||
|
||
2. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L477-L514
|
||
— `lxc_push_fat32_file_streaming` implementation: reads FAT32 clusters sequentially and streams them into the Linux guest target path using `lxc_file_write`.
|
||
|
||
3. d:\Code\Deshab\CODE\UTSM\vmm\linux_compat.c:L551-L615
|
||
— `lxc_sync_lib_dir` implementation: finds `SYSTEM/lib`, enumerates `.so` files, constructs Linux target paths under `/usr/lib/deshab/`, and pushes each file via `lxc_push_fat32_file_streaming`.
|
||
|
||
4. d:\Code\Deshab\CODE\UTSM\include\utsm\linux_compat.h:L107-L111
|
||
— Public declaration and contract for `lxc_sync_lib_dir`, including that it syncs `.so` files to Linux guest `/usr/lib/deshab/`.
|
||
|
||
5. d:\Code\Deshab\CODE\dsk\main.c:L145-L231
|
||
— DSK’s embedded INI parser and lookup helpers: `dsk_ini_parse`, `dsk_ini_get`, `dsk_ini_get_int`, and `dsk_ini_get_bool`.
|
||
|
||
6. d:\Code\Deshab\CODE\dsk\main.c:L1302-L1342
|
||
— `dsk_spinner_and_check` reads the FUCK config from FAT32, parses it with `dsk_ini_parse`, and applies `[dsk]`/`[boot]` settings such as `show_logo`, `skip_login`, `mouse_init`, `netman`, and `dev_mode`.
|
||
|
||
Now I have a complete picture. Let me implement Phase 4. I need to:
|
||
1. Add `[compat]` section to FUCK config
|
||
2. Add `g_compat_*` globals + `utsm_apply_compat_config()` to UTSM main.c
|
||
3. Gate `lxc_sync_lib_dir()` and `pe_dll_manager_init` with config
|
||
4. Make `lxc_sync_lib_dir` use configurable paths
|
||
5. Add minimal `[compat]` awareness to DSK side
|
||
|
||
Let me first check if `SYSTEM/lib` exists and verify the linux_compat.h declaration.
|
||
|
||
The `SYSTEM/lib` directory exists but is empty (which is fine — the code tolerates that). Let me now implement Phase 4.
|
||
|
||
Step 1: Add `[compat]` section to the FUCK config file.
|
||
|
||
Step 2: Add `g_compat_*` globals and `utsm_apply_compat_config()` to UTSM main.c. Let me add the globals after the existing UTSM config variables.
|
||
|
||
Now add the `utsm_apply_compat_config()` function and call it from `utsm_apply_config()`:
|
||
|
||
I need to add a forward declaration for `utsm_apply_compat_config` since it's called before its definition. Let me add it before `utsm_apply_config`:
|
||
|
||
Now update `dll_reader_from_fat32` to use `g_compat_lib_path` instead of hardcoded "SYSTEM/lib/":
|
||
|
||
Now let me gate the `lxc_sync_lib_dir()` call and add `pe_dll_manager_init`. Let me read the current state of those sections:
|
||
|
||
Now gate the `lxc_sync_lib_dir()` call with `g_compat_linux_lib_sync` and pass the guest path:
|
||
|
||
Now add `pe_dll_manager_init` before `dsk_load_and_jump`, gated by `g_compat_pe_dll_search`:
|
||
|
||
Now update `lxc_sync_lib_dir` in `linux_compat.c` to accept the guest path parameter and use `g_compat_lib_path` for the FAT32 path. Let me first update the header:
|
||
|
||
Now update the `lxc_sync_lib_dir` implementation in `linux_compat.c`. Let me first check if there's already an `extern` declaration area at the top of the file:
|
||
|
||
Now update the `lxc_sync_lib_dir` function to accept the guest path parameter and use configurable paths:
|
||
|
||
Let me verify the daemon's `LD_LIBRARY_PATH` setup is in place:
|
||
|
||
Good — the daemon's `LD_LIBRARY_PATH` is already set. The default `/usr/lib/deshab` matches the config default, so they're consistent. Now let me handle the DSK side.
|
||
|
||
Now add `[compat]` config reading to DSK side. The DSK has its own INI parser. Let me add the config read after the existing `[dsk]`/`[boot]` config application:
|
||
|
||
Now let me verify there are no other callers of `lxc_sync_lib_dir` that need updating due to the signature change:
|
||
|
||
I notice a bug — `ini_get` takes 3 parameters, but I'm passing 4. Let me fix the `utsm_apply_compat_config` calls:
|
||
|
||
Now let me try building the project to verify everything compiles. Let me check the build script:
|
||
|
||
The `g_compat_lib_path` is used in `dll_reader_from_fat32` (line 33) but declared later (line 53). I need to move the globals before the function. Let me restructure:
|
||
|
||
I need to move the `g_compat_*` globals before `dll_reader_from_fat32`. Let me remove them from their current position and add them after the `fat32_read_path` extern:
|
||
|
||
Now remove the old duplicate `g_compat_*` block that's still further down in the file:
|
||
|
||
Good. Now let me rebuild:
|
||
|
||
The build compiled successfully — all `.elf` files were built (UTSM, DSK, drivers, etc.). The only error is the final IMG packaging step failing because `dehab.img` is locked by another process (likely QEMU). Let me check for any compilation warnings in the full output:
|
||
|
||
No compilation warnings or errors — only the file lock on `dehab.img`. Let me kill any QEMU process holding the lock and rebuild:
|
||
|
||
Build succeeded completely — exit code 0, IMG packaged. Let me mark all tasks complete and update the plan document:
|
||
|
||
Phase 4 完成。构建通过,所有改动编译干净。以下是本次变更总结:
|
||
|
||
## Phase 4: FUCK `[compat]` 配置段 — 已完成
|
||
|
||
### 改动文件清单
|
||
|
||
**1. [SYSTEM/system/deshab64/FUCK](file:///d:/Code/Deshab/SYSTEM/system/deshab64/FUCK)** — 新增 `[compat]` 段
|
||
|
||
```ini
|
||
[compat]
|
||
lib_path=lib # SYSTEM/ 下的库子目录名
|
||
linux_lib_guest_path=/usr/lib/deshab # Linux guest 内库目录路径
|
||
linux_lib_sync=1 # 启动时推送 .so 到 Linux guest
|
||
pe_dll_search=1 # PE 加载时从 SYSTEM/lib 搜索真实 DLL
|
||
```
|
||
|
||
**2. [CODE/UTSM/kernel/main.c](file:///d:/Code/Deshab/CODE/UTSM/kernel/main.c)** — 核心配置应用
|
||
- 新增 4 个全局变量 `g_compat_lib_path` / `g_compat_linux_guest_path` / `g_compat_linux_lib_sync` / `g_compat_pe_dll_search`(带硬编码默认值)
|
||
- 新增 `utsm_apply_compat_config()`,从 FUCK `[compat]` 段读取配置覆盖默认值
|
||
- `lxc_sync_lib_dir()` 调用受 `g_compat_linux_lib_sync` 门控,传入 `g_compat_linux_guest_path`
|
||
- `pe_dll_manager_init()` 调用受 `g_compat_pe_dll_search` 门控,在 DSK 跳转前初始化
|
||
- `dll_reader_from_fat32` 使用 `g_compat_lib_path` 构造路径(不再硬编码 `"SYSTEM/lib/"`)
|
||
|
||
**3. [CODE/UTSM/vmm/linux_compat.c](file:///d:/Code/Deshab/CODE/UTSM/vmm/linux_compat.c)** — `lxc_sync_lib_dir` 改造
|
||
- 函数签名改为 `int lxc_sync_lib_dir(const char *guest_lib_path)`
|
||
- FAT32 源路径从 `"SYSTEM/lib"` 改为 `"SYSTEM/" + g_compat_lib_path`(extern 全局)
|
||
- Linux 目标路径从 `"/usr/lib/deshab/"` 改为参数 `guest_lib_path`
|
||
|
||
**4. [CODE/UTSM/include/utsm/linux_compat.h](file:///d:/Code/Deshab/CODE/UTSM/include/utsm/linux_compat.h)** — 声明同步更新
|
||
|
||
**5. [CODE/dsk/main.c](file:///d:/Code/Deshab/CODE/dsk/main.c)** — DSK 侧读取 `[compat] pe_dll_search` 状态(仅日志,实际逻辑在 UTSM 侧)
|
||
|
||
### 配置行为
|
||
|
||
| 配置项 | 默认值 | 作用 | 关闭效果 |
|
||
|--------|--------|------|----------|
|
||
| `lib_path` | `lib` | FAT32 上 `SYSTEM/` 下的库子目录名 | — |
|
||
| `linux_lib_guest_path` | `/usr/lib/deshab` | Linux guest 内 `.so` 推送目标 | — |
|
||
| `linux_lib_sync` | `1` | 启动时推送 `.so` 到 guest | 跳过推送,guest 无 `SYSTEM/lib` 中的库 |
|
||
| `pe_dll_search` | `1` | PE shim miss 后从 `SYSTEM/lib` 加载真实 DLL | 仅用内置 shim,不加载磁盘 DLL |
|
||
|
||
删除 `[compat]` 段或缺失 FUCK 文件时,全部使用默认值,行为与之前一致。
|
||
|
||
### 四阶段全部完成状态
|
||
|
||
| 阶段 | 内容 | 状态 |
|
||
|------|------|------|
|
||
| Phase 1 | LFN 长文件名解析 | ✅ |
|
||
| Phase 2 | Linux 启动时 `.so` 全量推送 | ✅ |
|
||
| Phase 3 | PE 真实 DLL 加载 | ✅ |
|
||
| Phase 4 | FUCK `[compat]` 配置段 | ✅ |
|
||
|
||
---
|
||
|