新增change_path的syscall

apps/include/syscall.h

@@ -14,6 +14,7 @@
 #define SYSCALL_VFS_WRITEFILE 11
 #define SYSCALL_SYSINFO 12
 #define SYSCALL_EXEC 13
+#define SYSCALL_CHANGE_PATH 14
 
 #include "ctype.h"
 
@@ -30,5 +31,6 @@ void syscall_vfs_readfile(char* filename,char* buffer);
 void syscall_vfs_writefile(char* filename,char* buffer,unsigned int size);
 void* syscall_sysinfo();
 int syscall_exec(char *filename);
+void syscall_vfs_change_path(const char* path);
 
 #endif

apps/init/init.c

@@ -3,8 +3,8 @@
 
 int main(){
     printf("Init service launched.\n");
+    syscall_vfs_change_path("apps");
     int pid = exec_elf("shell.bin");
-    printf("Launching shell pid [%d]\n",pid);
     if(pid != -1){
         printf("Shell launch win! PID:[%d]\n",pid);
     } else printf("Error: Cannot launch shell\n");

apps/libs/syscall.c

@@ -95,3 +95,11 @@ int syscall_exec(char *filename){
     asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_EXEC), "r"(ebx) : "memory", "cc");
     return rets;
 }
+
+void syscall_vfs_change_path(const char *path){
+    uint32_t rets;
+    uint32_t __arg1 = (uint32_t)(path);
+    register uint32_t ebx asm("ebx")  = __arg1;
+    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_CHANGE_PATH), "r"(ebx) : "memory", "cc");
+    return rets;
+}

src/include/syscall.h

@@ -18,6 +18,7 @@
 #define SYSCALL_VFS_WRITEFILE 11
 #define SYSCALL_SYSINFO 12
 #define SYSCALL_EXEC 13
+#define SYSCALL_CHANGE_PATH 14
 
 void syscall_install();
 

src/kernel/kernel.c

@@ -159,10 +159,10 @@ void kernel_main(multiboot_t *multiboot) {
     clock_sleep(25);
 
     vfs_change_path("apps");
-    klogf(user_process("init.bin","InitService") != -1,"Init service process init.\n");
+    //klogf(user_process("init.bin","InitService") != -1,"Init service process init.\n");
 
-
+    int pid = user_process("shell.bin","UserShell");
-    //klogf(user_process("init.bin","Init") != -1,"Init base process init.\n");
+    kernel_thread(check_task_usershell,&pid,"CTU");
 
    // int pid = kernel_thread(setup_shell,NULL,"CPOS-Shell");
    // klogf(pid != -1,"Launch kernel shell.\n");

src/kernel/page.c

@@ -230,7 +230,7 @@ void init_page(multiboot_t *mboot) {
     current_directory = kernel_directory;
     int i = 0;
 
-    while (i < placement_address + 0x50000) {
+    while (i < placement_address + 0xf0000) {
         /*
          * 内核部分对ring3而言不可读不可写
          * 无偏移页表映射
@@ -240,6 +240,11 @@ void init_page(multiboot_t *mboot) {
         i += 0x1000;
     }
 
+
+    for (int i = KHEAP_START; i < KHEAP_START + KHEAP_INITIAL_SIZE; i++) {
+        alloc_frame(get_page(i, 1, kernel_directory,false), 1, 1);
+    }
+
     unsigned int j = mboot->framebuffer_addr,size = mboot->framebuffer_height * mboot->framebuffer_width*mboot->framebuffer_bpp;
 
     while (j <= mboot->framebuffer_addr + size){
@@ -247,9 +252,7 @@ void init_page(multiboot_t *mboot) {
         j += 0x1000;
     }
 
-    for (int i = KHEAP_START; i < KHEAP_START + KHEAP_INITIAL_SIZE; i++) {
+
-        alloc_frame(get_page(i, 1, kernel_directory,false), 1, 1);
-    }
 
 
     register_interrupt_handler(14, page_fault);

src/kernel/syscall.c

@@ -63,6 +63,10 @@ static void syscall_vfs_writefile(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_
     vfs_writefile(ebx,ecx,edx);
 }
 
+static void syscall_vfs_chang_path(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){
+    vfs_change_path(ebx);
+}
+
 struct sysinfo{
     char* osname;
     char* kenlname;
@@ -133,6 +137,7 @@ void *sycall_handlers[MAX_SYSCALLS] = {
         [SYSCALL_VFS_WRITEFILE] = syscall_vfs_writefile,
         [SYSCALL_SYSINFO] = syscall_sysinfo,
         [SYSCALL_EXEC] = syscall_exec,
+        [SYSCALL_CHANGE_PATH] = syscall_vfs_chang_path,
 };
 
 typedef size_t (*syscall_t)(size_t, size_t, size_t, size_t, size_t);

src/kernel/task.c

@@ -194,6 +194,7 @@ int32_t user_process(char *path, char *name){ // 用户进程创建
         return -1;
     }
     io_sti();
+
     uint32_t size = vfs_filesize(path);
     if(size == -1){
         return -1;
@@ -221,8 +222,6 @@ int32_t user_process(char *path, char *name){ // 用户进程创建
     new_task->tty = kmalloc(sizeof(tty_t));
     init_default_tty(new_task);
 
-    extern char root_disk;
-    vfs_change_disk(new_task,root_disk);
     vfs_copy(new_task,get_current()->vfs_now);
 
     io_sti();