🆕 运行文件系统中的二进制程序

user/Makefile

@@ -0,0 +1,33 @@
+user_sub_dirs = libs
+
+SUBDIR_ROOTS := . 
+DIRS := . $(shell find $(SUBDIR_ROOTS) -type d)
+GARBAGE_PATTERNS := *.o *.s~ *.s *.S~ *.c~ *.h~ kernel 
+GARBAGE := $(foreach DIR,$(DIRS),$(addprefix $(DIR)/,$(GARBAGE_PATTERNS)))
+
+
+objs := 
+CFLAGS := $(GLOBAL_CFLAGS) 
+current_CFLAGS := $(CFLAGS) -I $(shell pwd)/libs
+all: 
+	
+	@list='$(user_sub_dirs)'; for subdir in $$list; do \
+    		echo "make all in $$subdir";\
+    		cd $$subdir;\
+    		 $(MAKE) all CFLAGS="$(CFLAGS)";\
+    		cd ..;\
+	done
+	$(MAKE) init.o
+	$(MAKE) sys_api_lib
+	
+	objcopy -I elf64-x86-64 -S -R ".eh_frame" -R ".comment" -O binary sys_api_lib $(ROOT_PATH)/bin/user/init.bin
+
+sys_api_lib: init.o
+	
+
+	ld -b elf64-x86-64 -z muldefs -o sys_api_lib init.o $(shell find . -name "*.o") -T init.lds
+
+init.o: init.c 
+	gcc $(current_CFLAGS) -c init.c -o init.o
+clean: 
+	rm -rf $(GARBAGE)

user/init.c

@@ -0,0 +1,31 @@
+#include <libc/unistd.h>
+#include <libc/stdio.h>
+#include <libc/fcntl.h>
+
+int main()
+{
+
+    char string[] = "333.txt";
+    uint8_t buf[128] = {0};
+    char tips_str[] = "The first application 'init.bin' started successfully!\n";
+    put_string(tips_str, COLOR_GREEN, COLOR_BLACK);
+    int fd = open(string, 0);
+    read(fd, buf, 128);
+    
+    put_string(buf, COLOR_ORANGE, COLOR_BLACK);
+
+    lseek(fd, 0, SEEK_SET);
+    write(fd, tips_str, sizeof(tips_str)-1);
+    lseek(fd, 0, SEEK_SET);
+    
+    // 由于暂时没有实现用户态的memset，因此先手动清零
+    for(int i=0;i<128;++i)
+        buf[i] = 0;
+    
+    read(fd, buf, 128);
+    put_string(buf, COLOR_YELLOW, COLOR_BLACK);
+    close(fd);
+
+    while (1)
+        ;
+}

user/init.lds

@@ -0,0 +1,50 @@
+
+OUTPUT_FORMAT("elf64-x86-64","elf64-x86-64","elf64-x86-64")
+OUTPUT_ARCH(i386:x86-64)
+ENTRY(main)
+
+SECTIONS
+{
+
+	. = 0x800000;
+	
+	
+	.text :
+	{
+		_text = .;
+		
+		init.o(.text)
+		
+		_etext = .;
+	}
+	. = ALIGN(8);
+	
+	.data :
+	{
+		_data = .;
+		*(.data)
+		
+		_edata = .;
+	}
+
+
+	rodata_start_pa = .;
+	.rodata :
+	{
+		_rodata = .;	
+		*(.rodata)
+		_erodata = .;
+	}
+
+	
+	.bss :
+	{
+		_bss = .;
+		*(.bss)
+		_ebss = .;
+	}
+
+	_end = .;
+
+
+}

user/libs/Makefile

@@ -0,0 +1,11 @@
+
+user_libs_sub_dirs=libc libsystem
+
+
+all:
+	@list='$(user_libs_sub_dirs)'; for subdir in $$list; do \
+    		echo "make all in $$subdir";\
+    		cd $$subdir;\
+    		$(MAKE) all CFLAGS="$(CFLAGS) -I $(shell pwd)";\
+    		cd ..;\
+	done

user/libs/libc/Makefile

@@ -0,0 +1,12 @@
+all: libc
+
+CFLAGS += -I .
+
+
+libc: unistd.o fcntl.o
+
+unistd.o: unistd.c
+	gcc $(CFLAGS) -c unistd.c -o unistd.o
+
+fcntl.o: fcntl.c
+	gcc $(CFLAGS) -c fcntl.c -o fcntl.o

user/libs/libc/errno.h

@@ -0,0 +1,101 @@
+/**
+ * @file errno.h
+ * @author fslongjin (longjin@RinGoTek.cn)
+ * @brief
+ * @version 0.1
+ * @date 2022-04-22
+ *
+ * @copyright Copyright (c) 2022
+ *
+ */
+#pragma once
+
+#define E2BIG 1            /* 参数列表过长，或者在输出buffer中缺少空间 或者参数比系统内建的最大值要大 Argument list too long. */
+#define EACCES 2           /* 访问被拒绝 Permission denied */
+#define EADDRINUSE 3       /* 地址正在被使用 Address in use.*/
+#define EADDRNOTAVAIL 4    /* 地址不可用 Address  not available.*/
+#define EAFNOSUPPORT 5     /* 地址family不支持 Address family not supported. */
+#define EAGAIN 6           /* 资源不可用，请重试。 Resource unavailable, try again (may be the same value as [EWOULDBLOCK]).*/
+#define EALREADY 7         /* 连接已经在处理 Connection already in progress. */
+#define EBADF 8            /* 错误的文件描述符 Bad file descriptor. */
+#define EBADMSG 9          /* 错误的消息 Bad message. */
+
+#define EBUSY 10           /* 设备或资源忙 Device or resource busy. */
+#define ECANCELED 11       /* 操作被取消 Operation canceled. */
+#define ECHILD 12          /* 没有子进程 No child processes. */
+#define ECONNABORTED 13    /* 连接已断开 Connection aborted. */
+#define ECONNREFUSED 14    /* 连接被拒绝 Connection refused. */
+#define ECONNRESET 15      /* 连接被重置 Connection reset. */
+#define EDEADLK 16         /* 资源死锁将要发生 Resource deadlock would occur. */
+#define EDESTADDRREQ 17    /* 需要目标地址 Destination address required.*/
+#define EDOM 18            /* 数学参数超出作用域 Mathematics argument out of domain of function. */
+#define EDQUOT 19          /* 保留使用 Reserved */
+
+#define EEXIST 20          /* 文件已存在 File exists. */
+#define EFAULT 21          /* 错误的地址 Bad address */
+#define EFBIG 22           /* 文件太大 File too large. */
+#define EHOSTUNREACH 23    /* 主机不可达 Host is unreachable.*/
+#define EIDRM 24           /* 标志符被移除 Identifier removed. */
+#define EILSEQ 25          /* 不合法的字符序列 Illegal byte sequence. */
+#define EINPROGRESS 26     /* 操作正在处理 Operation in progress. */
+#define EINTR 27           /* 被中断的函数 Interrupted function. */
+#define EINVAL 28          /* 不可用的参数 Invalid argument. */
+#define EIO 29             /* I/O错误 I/O error. */
+
+#define EISCONN 30         /* 套接字已连接 Socket is connected. */
+#define EISDIR 31          /* 是一个目录 Is a directory */
+#define ELOOP 32           /* 符号链接级别过多 Too many levels of symbolic links. */
+#define EMFILE 33          /* 文件描述符的值过大 File descriptor value too large. */
+#define EMLINK 34          /* 链接数过多 Too many links. */
+#define EMSGSIZE 35        /* 消息过大 Message too large. */
+#define EMULTIHOP 36       /* 保留使用 Reserved. */
+#define ENAMETOOLONG 37    /* 文件名过长 Filename too long. */
+#define ENETDOWN 38        /* 网络已关闭 Network is down. */
+#define ENETRESET 39       /* 网络连接已断开 Connection aborted by network. */
+
+#define ENETUNREACH 40     /* 网络不可达 Network unreachable. */
+#define ENFILE 41          /* 系统中打开的文件过多 Too many files open in system.*/
+#define ENOBUFS 42         /* 缓冲区空间不足 No buffer space available. */
+#define ENODATA 43         /* 队列头没有可读取的消息 No message is available on the STREAM head read queue. */
+#define ENODEV 44          /* 没有指定的设备 No such device. */
+#define ENOENT 45          /* 没有指定的文件或目录 No such file or directory. */
+#define ENOEXEC 46         /* 可执行文件格式错误 Executable file format error. */
+#define ENOLCK 47          /* 没有可用的锁 No locks available. */
+#define ENOLINK 48         /* 保留 Reserved. */
+#define ENOMEM 49          /* 没有足够的空间 Not enough space. */
+
+#define ENOMSG 50          /* 没有期待类型的消息 No message of the desired type. */
+#define ENOPROTOOPT 51     /* 协议不可用 Protocol not available. */
+#define ENOSPC 52          /* 设备上没有空间 No space left on device. */
+#define ENOSR 53           /* 没有STREAM资源  No STREAM resources.*/
+#define ENOSTR 54          /* 不是STREAM Not a STREAM */
+#define ENOSYS 55          /* 功能不支持 Function not supported. */
+#define ENOTCONN 56        /* 套接字未连接 The socket is not connected. */
+#define ENOTDIR 57         /* 不是目录 Not a directory. */
+#define ENOTEMPTY 58       /* 目录非空 Directory not empty. */
+#define ENOTRECOVERABLE 59 /* 状态不可覆盖 State not recoverable. */
+
+#define ENOTSOCK 60        /* 不是一个套接字 Not a socket.*/
+#define ENOTSUP 61         /* 不被支持 Not supported (may be the same value as [EOPNOTSUPP]). */
+#define ENOTTY 62          /* 不正确的I/O控制操作 Inappropriate I/O control operation. */
+#define ENXIO 63           /* 没有这样的设备或地址 No such device or address. */
+#define EOPNOTSUPP 64      /* 套接字不支持该操作 Operation not supported on socket (may be the same value as [ENOTSUP]). */
+#define EOVERFLOW 65       /* 数值过大，产生溢出 Value too large to be stored in data type. */
+#define EOWNERDEAD 66      /* 之前的拥有者挂了 Previous owner died. */
+#define EPERM 67           /* 操作不被允许 Operation not permitted. */
+#define EPIPE 68           /* 断开的管道 Broken pipe. */
+#define EPROTO 69          /* 协议错误 Protocol error. */
+
+#define EPROTONOSUPPORT 70 /* 协议不被支持 Protocol not supported. */
+#define EPROTOTYPE 71      /* 对于套接字而言，错误的协议 Protocol wrong type for socket. */
+#define ERANGE 72          /* 结果过大 Result too large. */
+#define EROFS 73           /* 只读的文件系统 Read-only file system. */
+#define ESPIPE 74          /* 错误的寻道 Invalid seek. */
+#define ESRCH 75           /* 没有这样的进程 No such process. */
+#define ESTALE 76          /* 保留 Reserved. */
+#define ETIME 77           /* 流式ioctl()超时 Stream ioctl() timeout */
+#define ETIMEDOUT 78       /* 连接超时 Connection timed out.*/
+#define ETXTBSY 79         /* 文本文件忙 Text file busy. */
+
+#define EWOULDBLOCK 80     /* 操作将被禁止 Operation would block (may be the same value as [EAGAIN]). */
+#define EXDEV 81           /* 跨设备连接 Cross-device link. */

user/libs/libc/fcntl.c

@@ -0,0 +1,15 @@
+#include <libc/fcntl.h>
+#include <libsystem/syscall.h>
+
+/**
+ * @brief 打开文件的接口
+ *
+ * @param path 文件路径
+ * @param options 打开选项
+ * @param ...
+ * @return int 文件描述符
+ */
+int open(const char *path, int options, ...)
+{
+    return syscall_invoke(SYS_OPEN, (uint64_t)path, 0, 0, 0, 0, 0, 0, 0);
+}

user/libs/libc/fcntl.h

@@ -0,0 +1,42 @@
+/**
+ * @file fcntl.h
+ * @author fslongjin (longjin@RinGoTek.cn)
+ * @brief
+ * @version 0.1
+ * @date 2022-04-26
+ *
+ * @copyright Copyright (c) 2022
+ *
+ */
+#pragma once
+
+#define O_RDONLY 00000000 // Open Read-only
+#define O_WRONLY 00000001 // Open Write-only
+#define O_RDWR 00000002   // Open read/write
+#define O_ACCMODE 00000003 // Mask for file access modes
+
+#define O_CREAT 00000100 // Create file if it does not exist
+#define O_EXCL 00000200 // Fail if file already exists
+#define O_NOCTTY 00000400 // Do not assign controlling terminal
+
+#define O_TRUNC 00001000 // 文件存在且是普通文件，并以O_RDWR或O_WRONLY打开，则它会被清空
+
+#define O_APPEND 00002000   // 文件指针会被移动到文件末尾
+
+#define O_NONBLOCK 00004000 // 非阻塞式IO模式
+
+#define O_EXEC 00010000 // 以仅执行的方式打开（非目录文件）
+#define O_SEARCH 00020000   // Open the directory for search only
+#define O_DIRECTORY 00040000 // 打开的必须是一个目录
+#define O_NOFOLLOW 00100000 // Do not follow symbolic links
+
+
+/**
+ * @brief 打开文件的接口
+ * 
+ * @param path 文件路径
+ * @param options 打开选项
+ * @param ... 
+ * @return int 文件描述符
+ */
+int open(const char * path, int options, ...);

user/libs/libc/stdio.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#define	SEEK_SET	0	/* Seek relative to start-of-file */
+#define	SEEK_CUR	1	/* Seek relative to current position */
+#define	SEEK_END	2	/* Seek relative to end-of-file */
+
+#define SEEK_MAX	3

user/libs/libc/sys/types.h

@@ -0,0 +1,83 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef unsigned char u_char;
+typedef unsigned short u_short;
+typedef unsigned int u_int;
+typedef unsigned long u_long;
+
+typedef uint32_t uid_t;
+typedef uint32_t gid_t;
+typedef long long ssize_t;
+
+typedef int __pid_t;
+#define pid_t __pid_t
+typedef __SIZE_TYPE__ size_t;
+
+typedef char *caddr_t;
+
+typedef int id_t;
+
+typedef uint64_t ino_t;
+typedef int64_t off_t;
+
+typedef uint32_t blkcnt_t;
+typedef uint32_t blksize_t;
+typedef uint32_t dev_t;
+typedef uint16_t mode_t;
+typedef uint32_t nlink_t;
+
+typedef int64_t time_t;
+typedef uint32_t useconds_t;
+typedef int32_t suseconds_t;
+typedef uint32_t clock_t;
+
+typedef uint64_t fsblkcnt_t;
+typedef uint64_t fsfilcnt_t;
+
+#define __socklen_t_defined
+#define __socklen_t uint32_t
+typedef __socklen_t socklen_t;
+
+struct utimbuf
+{
+    time_t actime;
+    time_t modtime;
+};
+
+typedef int pthread_t;
+typedef int pthread_key_t;
+typedef uint32_t pthread_once_t;
+
+typedef struct __pthread_mutex_t
+{
+    uint32_t lock;
+    pthread_t owner;
+    int level;
+    int type;
+} pthread_mutex_t;
+
+typedef void *pthread_attr_t;
+typedef struct __pthread_mutexattr_t
+{
+    int type;
+} pthread_mutexattr_t;
+
+typedef struct __pthread_cond_t
+{
+    pthread_mutex_t *mutex;
+    uint32_t value;
+    int clockid; // clockid_t
+} pthread_cond_t;
+
+typedef uint64_t pthread_rwlock_t;
+typedef void *pthread_rwlockattr_t;
+typedef struct __pthread_spinlock_t
+{
+    int m_lock;
+} pthread_spinlock_t;
+typedef struct __pthread_condattr_t
+{
+    int clockid; // clockid_t
+} pthread_condattr_t;

user/libs/libc/unistd.c

@@ -0,0 +1,65 @@
+#include <libc/unistd.h>
+#include <libsystem/syscall.h>
+
+
+/**
+ * @brief 往屏幕上输出字符串
+ * 
+ * @param str 字符串指针
+ * @param front_color 前景色
+ * @param bg_color 背景色
+ * @return int64_t 
+ */
+int64_t put_string(char* str, uint64_t front_color, uint64_t bg_color)
+{
+    return syscall_invoke(SYS_PUT_STRING, str, front_color, bg_color,0,0,0,0,0);
+}
+/**
+ * @brief 关闭文件接口
+ *
+ * @param fd 文件描述符
+ * @return int
+ */
+int close(int fd)
+{
+    return syscall_invoke(SYS_CLOSE, fd, 0, 0, 0, 0, 0, 0, 0);
+}
+
+/**
+ * @brief 从文件读取数据的接口
+ *
+ * @param fd 文件描述符
+ * @param buf 缓冲区
+ * @param count 待读取数据的字节数
+ * @return ssize_t 成功读取的字节数
+ */
+ssize_t read(int fd, void *buf, size_t count)
+{
+    return (ssize_t)syscall_invoke(SYS_READ, fd, buf, count,0,0,0,0,0);
+}
+
+/**
+ * @brief 向文件写入数据的接口
+ *
+ * @param fd 文件描述符
+ * @param buf 缓冲区
+ * @param count 待写入数据的字节数
+ * @return ssize_t 成功写入的字节数
+ */
+ssize_t write(int fd, void const *buf, size_t count)
+{
+    return (ssize_t)syscall_invoke(SYS_WRITE, fd, buf, count,0,0,0,0,0);
+}
+
+/**
+ * @brief 调整文件的访问位置
+ *
+ * @param fd 文件描述符号
+ * @param offset 偏移量
+ * @param whence 调整模式
+ * @return uint64_t 调整结束后的文件访问位置
+ */
+off_t lseek(int fd, off_t offset, int whence)
+{
+    return (off_t)syscall_invoke(SYS_LSEEK, fd, offset, whence, 0,0,0,0,0);
+}

user/libs/libc/unistd.h

@@ -0,0 +1,79 @@
+#pragma once
+#include <stdint.h>
+#include <libc/sys/types.h>
+
+// 字体颜色的宏定义
+#define COLOR_WHITE 0x00ffffff  //白
+#define COLOR_BLACK 0x00000000  //黑
+#define COLOR_RED 0x00ff0000    //红
+#define COLOR_ORANGE 0x00ff8000 //橙
+#define COLOR_YELLOW 0x00ffff00 //黄
+#define COLOR_GREEN 0x0000ff00  //绿
+#define COLOR_BLUE 0x000000ff   //蓝
+#define COLOR_INDIGO 0x0000ffff //靛
+#define COLOR_PURPLE 0x008000ff //紫
+
+
+/**
+ * @brief 往屏幕上输出字符串
+ * 
+ * @param str 字符串指针
+ * @param front_color 前景色
+ * @param bg_color 背景色
+ * @return int64_t 
+ */
+int64_t put_string(char* str, uint64_t front_color, uint64_t bg_color);
+
+
+/**
+ * @brief 关闭文件接口
+ *
+ * @param fd 文件描述符
+ * @return int
+ */
+int close(int fd);
+
+/**
+ * @brief 从文件读取数据的接口
+ *
+ * @param fd 文件描述符
+ * @param buf 缓冲区
+ * @param count 待读取数据的字节数
+ * @return ssize_t 成功读取的字节数
+ */
+ssize_t read(int fd, void *buf, size_t count);
+
+/**
+ * @brief 向文件写入数据的接口
+ *
+ * @param fd 文件描述符
+ * @param buf 缓冲区
+ * @param count 待写入数据的字节数
+ * @return ssize_t 成功写入的字节数
+ */
+ssize_t write(int fd, void const *buf, size_t count);
+
+/**
+ * @brief 调整文件的访问位置
+ *
+ * @param fd 文件描述符号
+ * @param offset 偏移量
+ * @param whence 调整模式
+ * @return uint64_t 调整结束后的文件访问位置
+ */
+off_t lseek(int fd, off_t offset, int whence);
+
+/**
+ * @brief fork当前进程
+ * 
+ * @return pid_t 
+ */
+pid_t fork(void);
+
+/**
+ * @brief fork当前进程，但是与父进程共享VM、flags、fd
+ * 
+ * @return pid_t 
+ */
+pid_t vfork(void);
+

user/libs/libsystem/Makefile

@@ -0,0 +1,8 @@
+all: libsystem
+# echo $(shell pwd)
+
+
+libsystem: syscall.o
+
+syscall.o: syscall.c
+	gcc $(CFLAGS) -c syscall.c  -o syscall.o

user/libs/libsystem/syscall.c

@@ -0,0 +1,20 @@
+#include "syscall.h"
+
+long syscall_invoke(uint64_t syscall_id, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6, uint64_t arg7)
+{
+    long err_code;
+    __asm__ __volatile__(
+        "movq %2, %%r8 \n\t"
+        "movq %3, %%r9 \n\t"
+        "movq %4, %%r10 \n\t"
+        "movq %5, %%r11 \n\t"
+        "movq %6, %%r12 \n\t"
+        "movq %7, %%r13 \n\t"
+        "movq %8, %%r14 \n\t"
+        "movq %9, %%r15 \n\t"
+        "int $0x80   \n\t"
+        : "=a"(err_code)
+        : "a"(syscall_id), "m"(arg0), "m"(arg1), "m"(arg2), "m"(arg3), "m"(arg4), "m"(arg5), "m"(arg6), "m"(arg7)
+        : "memory", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "rcx", "rdx");
+    return err_code;
+}

user/libs/libsystem/syscall.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <stdint.h>
+
+// 系统调用号
+#define SYS_NOT_EXISTS 0
+#define SYS_PUT_STRING 1
+#define SYS_OPEN 2
+#define SYS_CLOSE 3
+#define SYS_READ 4
+#define SYS_WRITE 5
+#define SYS_LSEEK 6
+#define SYS_FORK 7
+#define SYS_VFORK 8
+
+/**
+ * @brief 用户态系统调用函数
+ *
+ * @param syscall_id
+ * @param arg0
+ * @param arg1
+ * @param arg2
+ * @param arg3
+ * @param arg4
+ * @param arg5
+ * @param arg6
+ * @param arg7
+ * @return long
+ */
+long syscall_invoke(uint64_t syscall_id, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6, uint64_t arg7);