Notepad port to userspace and bug fixes

src/kernel/userland/libc/libui.c

@@ -1,5 +1,6 @@
 #include "libui.h"
 #include "syscall.h"
+#include "syscall_user.h"
 #include <stddef.h>
 
 extern uint64_t syscall3(uint64_t sys_num, uint64_t arg1, uint64_t arg2, uint64_t arg3);

src/kernel/userland/libc/libui.h

@@ -18,6 +18,7 @@
 #define GUI_EVENT_CLICK       2
 #define GUI_EVENT_RIGHT_CLICK 3
 #define GUI_EVENT_CLOSE       4
+#define GUI_EVENT_KEY         5
 
 typedef struct {
     int type;
@@ -26,7 +27,7 @@ typedef struct {
 } gui_event_t;
 
 // Window Handle
-typedef int ui_window_t;
+typedef uint64_t ui_window_t;
 
 // libui API
 ui_window_t ui_window_create(const char *title, int x, int y, int w, int h);

src/kernel/userland/libc/syscall.c

@@ -69,3 +69,48 @@ void sys_exit(int status) {
 int sys_write(int fd, const char *buf, int len) {
     return (int)syscall3(SYS_WRITE, (uint64_t)fd, (uint64_t)buf, (uint64_t)len);
 }
+
+int sys_open(const char *path, const char *mode) {
+    return (int)syscall3(SYS_FS, FS_CMD_OPEN, (uint64_t)path, (uint64_t)mode);
+}
+
+int sys_read(int fd, void *buf, uint32_t len) {
+    return (int)syscall4(SYS_FS, FS_CMD_READ, (uint64_t)fd, (uint64_t)buf, (uint64_t)len);
+}
+
+int sys_write_fs(int fd, const void *buf, uint32_t len) {
+    return (int)syscall4(SYS_FS, FS_CMD_WRITE, (uint64_t)fd, (uint64_t)buf, (uint64_t)len);
+}
+
+void sys_close(int fd) {
+    syscall2(SYS_FS, FS_CMD_CLOSE, (uint64_t)fd);
+}
+
+int sys_seek(int fd, int offset, int whence) {
+    return (int)syscall4(SYS_FS, FS_CMD_SEEK, (uint64_t)fd, (uint64_t)offset, (uint64_t)whence);
+}
+
+uint32_t sys_tell(int fd) {
+    return (uint32_t)syscall2(SYS_FS, FS_CMD_TELL, (uint64_t)fd);
+}
+
+uint32_t sys_size(int fd) {
+    return (uint32_t)syscall2(SYS_FS, FS_CMD_SIZE, (uint64_t)fd);
+}
+
+int sys_list(const char *path, struct FAT32_FileInfo *entries, int max_entries) {
+    return (int)syscall4(SYS_FS, FS_CMD_LIST, (uint64_t)path, (uint64_t)entries, (uint64_t)max_entries);
+}
+
+int sys_delete(const char *path) {
+    return (int)syscall2(SYS_FS, FS_CMD_DELETE, (uint64_t)path);
+}
+
+int sys_mkdir(const char *path) {
+    return (int)syscall2(SYS_FS, FS_CMD_MKDIR, (uint64_t)path);
+}
+
+int sys_exists(const char *path) {
+    return (int)syscall2(SYS_FS, FS_CMD_EXISTS, (uint64_t)path);
+}
+

src/kernel/userland/libc/syscall.h

@@ -6,6 +6,21 @@
 // Standard syscalls available from Kernel mode
 #define SYS_EXIT  0
 #define SYS_WRITE 1
+#define SYS_GUI   3
+#define SYS_FS    4
+
+// FS Commands
+#define FS_CMD_OPEN 1
+#define FS_CMD_READ 2
+#define FS_CMD_WRITE 3
+#define FS_CMD_CLOSE 4
+#define FS_CMD_SEEK 5
+#define FS_CMD_TELL 6
+#define FS_CMD_LIST 7
+#define FS_CMD_DELETE 8
+#define FS_CMD_SIZE 9
+#define FS_CMD_MKDIR 10
+#define FS_CMD_EXISTS 11
 
 // Internal assembly entry into Ring 0
 extern uint64_t syscall0(uint64_t sys_num);
@@ -19,4 +34,19 @@ extern uint64_t syscall5(uint64_t sys_num, uint64_t arg1, uint64_t arg2, uint64_
 void sys_exit(int status);
 int sys_write(int fd, const char *buf, int len);
 
+// FS API
+int sys_open(const char *path, const char *mode);
+int sys_read(int fd, void *buf, uint32_t len);
+int sys_write_fs(int fd, const void *buf, uint32_t len);
+void sys_close(int fd);
+int sys_seek(int fd, int offset, int whence);
+uint32_t sys_tell(int fd);
+uint32_t sys_size(int fd);
+int sys_delete(const char *path);
+int sys_mkdir(const char *path);
+int sys_exists(const char *path);
+
+struct FAT32_FileInfo;
+int sys_list(const char *path, struct FAT32_FileInfo *entries, int max_entries);
+
 #endif

src/kernel/userland/libc/syscall_user.h

@@ -0,0 +1,11 @@
+#ifndef SYSCALL_USER_H
+#define SYSCALL_USER_H
+
+#include "syscall.h"
+#include <stddef.h>
+
+static inline void sys_serial_write(const char *str) {
+    syscall2(8, 0, (uint64_t)str);
+}
+
+#endif