feat(mm,procfs): 添加/proc/<pid>/maps文件支持并改进缺页异常处理#1468
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fslongjin merged 4 commits intoDragonOS-Community:masterfrom Dec 15, 2025
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feat(mm,procfs): 添加/proc/<pid>/maps文件支持并改进缺页异常处理#1468fslongjin merged 4 commits intoDragonOS-Community:masterfrom
fslongjin merged 4 commits intoDragonOS-Community:masterfrom
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Dec 15, 2025
fslongjin
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- 新增/proc//maps文件实现，支持显示进程内存映射信息
- 改进缺页异常处理逻辑，优先根据TrapFrame/错误码判断用户态访问
- 修复sys_gettimeofday系统调用中用户空间缓冲区访问保护问题
- 在gvisor测试白名单中添加time_test
- 优先使用TrapFrame和错误码判断访问发起者，而非仅依赖地址范围 - 避免用户态访问高地址区域时触发内核panic，改为产生SIGSEGV - 确保内核态访问用户地址时能正确走用户态fault处理路径 Signed-off-by: longjin <longjin@DragonOS.org>
- 重构 sys_gettimeofday 系统调用处理逻辑，使用 buffer_protected 保护用户空间访问 - 修复 tv 和 timezone 指针为空时的处理逻辑，避免空指针错误 - 根据调用来源（用户/内核）动态设置用户空间访问保护标志 Signed-off-by: longjin <longjin@DragonOS.org>
- 新增proc_maps模块，实现/proc/<pid>/maps文件的生成逻辑 - 在ProcFS中注册maps文件，支持进程文件夹的创建和清理 - 更新gvisor测试白名单，添加time_test Signed-off-by: longjin <longjin@DragonOS.org>
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