用户elf加载备份

apps/base_service/Makefile

@@ -8,7 +8,7 @@ out/%.obj : %.c Makefile
 out/%.obj : %.cpp Makefile
 	$(CPP) -c $*.cpp -o out/$*.obj
 out/%.obj : %.asm Makefile
-	nasm -f elf $*.asm -o out/$*.obj
+	nasm -f elf_i386 $*.asm -o out/$*.obj
 
 clean:
 	rm out/*

apps/base_service/service.c

@@ -1,7 +1,7 @@
 #include "../include/stdio.h"
 
 int main(){
-
+    debug_test();
     while (1);
     return 0;
 }

apps/include/stdio.h

@@ -2,5 +2,6 @@
 #define CRASHPOWEROS_STDIO_H
 
 void put_char(char c);
+void debug_test();
 
 #endif

apps/init/Makefile

@@ -8,7 +8,7 @@ out/%.obj : %.c Makefile
 out/%.obj : %.cpp Makefile
 	$(CPP) -c $*.cpp -o out/$*.obj
 out/%.obj : %.asm Makefile
-	nasm -f elf $*.asm -o out/$*.obj
+	nasm -f elf_i386 $*.asm -o out/$*.obj
 
 clean:
 	rm out/*

apps/init/init.c

@@ -1,11 +1,11 @@
 #include "../include/stdio.h"
 
-void putc(char c){
-
+void hlt(){
+    while (1);
 }
 
 int main(){
-    putc('A');
-    while (1);
+    hlt();
+    //put_char('A');
     return 0;
 }

apps/libs/syscall.asm

@@ -1,6 +1,8 @@
 global put_char
+global debug_test
 
 put_char:
+    ret
     push	edx
     push	eax
     mov edx,[ss:esp+12]
@@ -9,3 +11,10 @@ put_char:
     pop	eax
     pop	edx
     ret
+
+debug_test:
+    push edx
+    mov edx,0x02
+    int 31h
+    pop edx
+    ret

src/boot/io.asm

@@ -40,7 +40,7 @@ copy_page_physical:
     popf                  ; Pop EFLAGS back.
     pop ebx               ; Get the original value of EBX back.
 
-switch_to:
+switch_to: ;void switch_to(struct context *prev, struct context *next);
         mov eax, [esp+4]
 
         mov [eax+0],  esp

src/driver/serial.c

@@ -32,8 +32,7 @@ char read_serial() {
 int is_transmit_empty() { return io_in8(SERIAL_PORT + 5) & 0x20; }
 
 void write_serial(char a) {
-    while (is_transmit_empty() == 0)
-        ;
-
+    return;
+    while (is_transmit_empty() == 0);
     io_out8(SERIAL_PORT, a);
 }

src/driver/vbe.c

@@ -4,17 +4,21 @@
 #include "../include/common.h"
 #include "../include/multiboot2.h"
 #include "../include/timer.h"
+#include "../include/bmp.h"
 
 uint32_t width, height;
 uint32_t c_width, c_height; // 字符绘制总宽高
 int32_t x, y;
 int32_t cx, cy; // 字符坐标
 uint32_t color, back_color;
+
 uint32_t *screen;
+
 uint32_t *char_buffer;
 extern uint8_t ascfont[];
 extern uint8_t plfont[];
 extern uint8_t bafont[];
+extern uint8_t logo_bmp[];
 
 bool vbe_status = false;
 
@@ -54,44 +58,18 @@ void vbe_scroll() {
             screen[i] = back_color;
         }
     }
-
-
-    /*
-    if (cy >= c_height) {
-        cy = c_height - 1;
-        for (int i = 0; i < height; i++) {
-            for (int j = 0; j < width; j++) {
-                screen[j + i * width] = screen[j + (i + 16) * width];
-            }
-        }
-    }
-    if (y == height - height % 16) {
-        cy = c_height - 1;
-        for (int i = 0; i < height; i++) {
-            for (int j = 0; j < width; j++) {
-                (screen)[j + i * width] = (screen)[j + (i + 16 - height % 16) * width];
-            }
-        }
-    }
-    for (int i = 0; i < width; i++) {
-        for (int j = 0; j < 28; j++) {
-            screen[height * (width + j) + i] = back_color;
-        }
-    }
-     */
 }
 
 void vbe_draw_char(char c, int32_t x, int32_t y) {
     if (c == ' ') {
         for (int i = 0; i < 16; i++) {
             for (int j = 0; j < 9; j++) {
-                screen[(y + i) * width + x + j] = back_color;
+                //screen[(y + i) * width + x + j] = back_color;
             }
         }
         return;
     }
 
-
     uint8_t *font = bafont;
     //uint8_t *font = ascfont;
 
@@ -104,13 +82,6 @@ void vbe_draw_char(char c, int32_t x, int32_t y) {
             } //else screen[(y + i) * width + x + j] = back_color;
         }
     }
-    for (int i = 0; i < 16; i++) {
-        for (int j = 0; j < 9; j++) {
-            if (font[i] & (0x80 >> j)) {
-                screen[(y + i) * width + x + j] = color;
-            } //else screen[(y + i) * width + x + j + 1] = back_color;
-        }
-    }
 }
 
 int cur_task() {
@@ -147,7 +118,9 @@ void vbe_putchar(char ch) {
             if (cy != 0) cy -= 1;
             if (cy == 0) cx = 0, cy = 0;
         }
-        //draw_rect(x, y, x + 9, y + 16, back_color);
+        int x = (cx+1) * 9 - 7;
+        int y = cy * 16;
+        draw_rect(x, y, x + 9, y + 16, back_color);
         return;
     }
 
@@ -158,10 +131,10 @@ void vbe_putchar(char ch) {
 
 void vbe_write(const char *data, size_t size) {
     static const long hextable[] = {
-            [0 ... 255] = -1, // bit aligned access into this table is considerably
-            ['0'] = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, // faster for most modern processors,
-            ['A'] = 10, 11, 12, 13, 14, 15,       // for the space conscious, reduce to
-            ['a'] = 10, 11, 12, 13, 14, 15        // signed char.
+            [0 ... 255] = -1,
+            ['0'] = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+            ['A'] = 10, 11, 12, 13, 14, 15,
+            ['a'] = 10, 11, 12, 13, 14, 15
     };
 
     for (;*data; ++data){
@@ -215,4 +188,7 @@ void initVBE(multiboot_t *info) {
     c_height = height / 16;
 
     vbe_clear();
+
+    Bmp *bmp = (Bmp*) &logo_bmp;
+    display(bmp,0,0,false);
 }

src/fs/iso9660.c

@@ -3,6 +3,7 @@
 #include "../include/vfs.h"
 #include "../include/vdisk.h"
 #include "../include/printf.h"
+
 bool read_sector(l9660_fs *fs, void *buf, uint32_t sector);
 #define l9660_seekdir(dir, pos) (l9660_seek(&(dir)->file, L9660_SEEK_SET, (pos)))
 #define l9660_telldir(dir) (l9660_tell(&(dir)->file))

src/include/elf.h

@@ -3225,5 +3225,6 @@ int elf32Validate(Elf32_Ehdr *hdr);
 void load_segment(Elf32_Phdr *phdr,page_directory_t *pdt, void *elf);
 uint32_t load_elf(Elf32_Ehdr *hdr,page_directory_t *pdt);
 void elf32LoadData(Elf32_Ehdr *elfhdr, uint8_t *ptr);
+uint32_t elf32_get_max_vaddr(Elf32_Ehdr *hdr);
 
 #endif	/* elf.h */

src/include/multiboot.h

@@ -79,6 +79,14 @@ typedef struct mmap_entry_t {
     uint32_t type;
 } __attribute__((packed)) mmap_entry_t;
 
+typedef struct {
+    uint32_t type;
+    uint32_t size;
+    uint32_t biosdev;
+    uint32_t partition;
+    uint32_t sub_partition;
+} multiboot_tag_bootdev_t;
+
 // 声明全局的 multiboot_t * 指针
 // 内核未建立分页机制前暂存的指针
 extern multiboot_t *mboot_ptr_tmp;

src/include/task.h

@@ -31,6 +31,7 @@ struct context{
     uint32_t eip;
     uint32_t ds;
     uint32_t cs;
+    uint32_t ss;
 };
 
 // 进程控制块 PCB
@@ -40,11 +41,11 @@ struct task_struct {
     int mem_size;                 // 内存利用率
     char *name;                   // 进程名
     void *stack;                  // 进程的内核栈地址
-    header_t *head;
+    header_t *head;               // 进程堆
     header_t *tail;
-    bool isUser;
-    uint32_t program_break;
-    uint32_t program_break_end;
+    bool isUser;                  // 是否是用户进程
+    uint32_t program_break;       // 进程堆基址
+    uint32_t program_break_end;   // 进程堆尾
     page_directory_t *pgd_dir;    // 进程页表
     struct context context;       // 上下文信息
     struct task_struct *next;     // 链表指针

src/kernel/kernel.c

@@ -75,6 +75,13 @@ void kernel_main(multiboot_t *multiboot) {
     }
 
     initVBE(multiboot);
+
+
+    char* cmdline = multiboot->cmdline;
+    if(cmdline != NULL){
+        printf("Multiboot command line: %s\n",cmdline);
+    }
+
     printf("CPOS_Kernel %s (GRUB Multiboot) on an i386.\n",OS_VERSION);
     printf("Memory Size: %dMB\n",(multiboot->mem_upper + multiboot->mem_lower) / 1024 + 1);
     gdt_install();

src/kernel/panic.c

@@ -44,8 +44,10 @@ void panic_pane(char* msg,enum PANIC_TYPE type){
     back_color = 0x1e90ff;
     color = 0xffffff;
     screen_clear();
-    if(panic_bmp != NULL)
-        display(panic_bmp,0,0,true);
+    if(panic_bmp != NULL){
+        display(panic_bmp,0,0,false);
+    } else klogf(false,"Cannot draw panic image.\n");
+
     cx = 10;
     cy = c_height - 10;
 

src/kernel/syscall.c

@@ -5,8 +5,6 @@
 #include "../include/graphics.h"
 #include "../include/io.h"
 
-extern asm_syscall_handler();
-
 void syscall_handler(registers_t regs){
     io_cli();
     printf("Syscall is enable.\n");
@@ -18,5 +16,5 @@ void syscall_handler(registers_t regs){
 }
 
 void syscall_install(){
-    register_interrupt_handler(31,asm_syscall_handler);
+    register_interrupt_handler(31,syscall_handler);
 }

src/kernel/task.c

@@ -140,7 +140,7 @@ void task_kill(int pid) {
         return;
     }
     argv->state = TASK_DEATH;
-    printf("Taskkill process PID:%d Name:%s\n", current->pid, current->name);
+    printf("Taskkill process PID:%d Name:%s\n", argv->pid, argv->name);
     printf("Task [%s] exit code: -130.\n", argv->name);
 
     kfree(argv);
@@ -175,15 +175,17 @@ void change_task_to(registers_t *reg,struct task_struct *next) {
         prev->context.ds = reg->ds;
         prev->context.cs = reg->cs;
         prev->context.eax = reg->eax;
+        prev->context.ss = reg->ss;
         switch_to(&(prev->context), &(current->context));
         reg->ds = current->context.ds;
         reg->cs = current->context.cs;
         reg->eip = current->context.eip;
         reg->eax = current->context.eax;
+        reg->ss = current->context.ss;
     }
 }
 
-int32_t user_process(char *path, char *name){
+int32_t user_process(char *path, char *name){ // 用户进程创建
     can_sche = 0;
     if(path == NULL){
         return -1;
@@ -216,6 +218,8 @@ int32_t user_process(char *path, char *name){
 
     page_switch(page);
 
+    printf("TASK I\n");
+
     for (int i = USER_START; i < USER_END;i++) {
         page_t *pg = get_page(i,1,page, false);
         alloc_frame(pg,0,1);
@@ -223,8 +227,10 @@ int32_t user_process(char *path, char *name){
 
     char* buffer = user_alloc(new_task,size);
 
+    printf("TASK II\n");
+
     memset(buffer,0,size);
-    vfs_readfile(path,buffer);
+    vfs_readfile(path,buffer); //能加载, 但是执行一会就不知道跳哪里去了，给自己爆了
 
     Elf32_Ehdr *ehdr = buffer;
     if(!elf32Validate(ehdr)){
@@ -233,6 +239,7 @@ int32_t user_process(char *path, char *name){
     }
 
     uint32_t main = load_elf(ehdr,page);
+    printf("Task [PID: %d] start_function: %08x\n",new_task->pid,main);
 
     uint32_t *stack_top = (uint32_t * )((uint32_t) new_task + STACK_SIZE); 
 
@@ -262,7 +269,7 @@ int32_t user_process(char *path, char *name){
 }
 
 
-int32_t kernel_thread(int (*fn)(void *), void *arg, char *name) {
+int32_t kernel_thread(int (*fn)(void *), void *arg, char *name) { // 内核进程(线程) 创建
     io_cli();
     struct task_struct *new_task = (struct task_struct *) kmalloc(STACK_SIZE);
     assert(new_task != NULL, "kern_thread: kmalloc error");
@@ -316,7 +323,6 @@ void kthread_exit() {
     register uint32_t val asm ("eax");
     printf("Task [PID: %d] exited with value %d\n", current->pid,val);
     task_kill(current->pid);
-    current->state = TASK_DEATH;
     while (1);
 }
 

src/util/elf.c

@@ -13,8 +13,22 @@ bool elf32Validate(Elf32_Ehdr *hdr) {
            hdr->e_ident[EI_MAG2] == ELFMAG2 && hdr->e_ident[EI_MAG3] == ELFMAG3;
 }
 
+uint32_t elf32_get_max_vaddr(Elf32_Ehdr *hdr) {
+    Elf32_Phdr *phdr = (Elf32_Phdr *) ((uint32_t) hdr + hdr->e_phoff);
+    uint32_t max = 0;
+    for (int i = 0; i < hdr->e_phnum; i++) {
+        uint32_t size = MAX(
+                                phdr->p_filesz,
+                                phdr->p_memsz); // 如果memsz大于filesz 说明这是bss段，我们以最大的为准
+        max = MAX(max, phdr->p_vaddr + size);
+        phdr++;
+    }
+    return max;
+}
+
 void load_segment(Elf32_Phdr *phdr, page_directory_t *pdt, void *elf) {
     unsigned int p = div_round_up(phdr->p_memsz, 0x1000);
+
     int d = phdr->p_paddr;
     if (d & 0x00000fff) {
         unsigned e = d + phdr->p_memsz;
@@ -26,14 +40,47 @@ void load_segment(Elf32_Phdr *phdr,page_directory_t *pdt, void *elf) {
         alloc_frame(get_page(d + i * 0x1000, 1, pdt, false), 0, 1);
     }
     memcpy(phdr->p_vaddr, elf + phdr->p_offset, phdr->p_filesz);
+
     if (phdr->p_memsz > phdr->p_filesz) { // 这个是bss段
         memset(phdr->p_vaddr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
     }
 }
 
+static uint32_t reload_elf_file(uint8_t *file_buffer) {
+    Elf32_Ehdr *elf_hdr = (Elf32_Ehdr *) file_buffer;
+    //检测文件类型
+    if ((elf_hdr->e_ident[0] != 0x7f) || (elf_hdr->e_ident[1] != 'E') ||
+        (elf_hdr->e_ident[2] != 'L') || (elf_hdr->e_ident[3] != 'F')) {
+        return 0;
+    }
+    for (int i = 0; i < elf_hdr->e_phnum; i++) {
+        Elf32_Phdr *phdr = (Elf32_Phdr *) (file_buffer + elf_hdr->e_phoff) + i;
+        if (phdr->p_type != PT_LOAD) {
+            continue;
+        }
+        //获取源文件地址以及需要加载的位置
+        uint8_t *src = file_buffer + phdr->p_offset;
+        //printf("POFFSET: %08x\n",phdr->p_offset);
+        uint8_t *dest = (uint8_t *) phdr->p_paddr;
+        for (int j = 0; j < phdr->p_filesz; j++) {
+            *dest++ = *src++;
+        }
+        //计算结束地址, 对bss区域进行清零
+        dest = (uint8_t *) phdr->p_paddr + phdr->p_filesz;
+        for (int j = 0; j < phdr->p_memsz - phdr->p_filesz; j++) {
+            *dest++ = 0;
+        }
+    }
+    //返回进入的地址
+    return elf_hdr->e_entry;
+}
+
 uint32_t load_elf(Elf32_Ehdr *hdr, page_directory_t *pdt) {
     Elf32_Phdr *phdr = (Elf32_Phdr *) ((uint32_t) hdr + hdr->e_phoff);
     for (int i = 0; i < hdr->e_phnum; i++) {
+        if (phdr->p_type != PT_LOAD) {
+            continue;
+        }
         load_segment(phdr, pdt, (void *) hdr);
         phdr++;
     }