初步实现syscall

boot/io.asm

@@ -5,10 +5,40 @@ global  io_in8,  io_in16,  io_in32
 global	io_out8, io_out16, io_out32
 global	io_load_eflags, io_store_eflags
 global	load_gdtr, load_idtr
-global tss_flush, gdt_flush, switch_to
+global tss_flush, gdt_flush, switch_to, copy_page_physical
 
 section .text
 
+[GLOBAL copy_page_physical]
+copy_page_physical:
+    push ebx              ; According to __cdecl, we must preserve the contents of EBX.
+    pushf                 ; push EFLAGS, so we can pop it and reenable interrupts
+                          ; later, if they were enabled anyway.
+    cli                   ; Disable interrupts, so we aren't interrupted.
+                          ; Load these in BEFORE we disable paging!
+    mov ebx, [esp+12]     ; Source address
+    mov ecx, [esp+16]     ; Destination address
+
+    mov edx, cr0          ; Get the control register...
+    and edx, 0x7fffffff   ; and...
+    mov cr0, edx          ; Disable paging.
+
+    mov edx, 1024         ; 1024*4bytes = 4096 bytes
+
+.loop:
+    mov eax, [ebx]        ; Get the word at the source address
+    mov [ecx], eax        ; Store it at the dest address
+    add ebx, 4            ; Source address += sizeof(word)
+    add ecx, 4            ; Dest address += sizeof(word)
+    dec edx               ; One less word to do
+    jnz .loop
+
+    mov edx, cr0          ; Get the control register again
+    or  edx, 0x80000000   ; and...
+    mov cr0, edx          ; Enable paging.
+
+    popf                  ; Pop EFLAGS back.
+    pop ebx               ; Get the original value of EBX back.
 
 switch_to:
         mov eax, [esp+4]

driver/keyboard.c

@@ -4,7 +4,7 @@
 #include "../include/queue.h"
 #include "../include/io.h"
 
-static KEY_STATUS *key_status;
+KEY_STATUS *key_status;
 Queue *key_char_queue;
 struct key_listener* head_listener;
 
@@ -122,6 +122,7 @@ void init_keyboard(){
     key_char_queue = create_queue();
     head_listener = (struct key_listener*) kmalloc(sizeof(struct key_listener));
     head_listener->func = default_handle;
+    head_listener->lid = 0;
 
     register_interrupt_handler(0x21,handle_keyboard_input);
 }
@@ -142,6 +143,59 @@ int handle_keyboard_input(){
     return 0;
 }
 
+static void found_listener(int lid,struct key_listener *head,struct key_listener *base,struct key_listener **argv,int first){
+    struct key_listener *t = base;
+    if(t == NULL){
+        argv = NULL;
+        return;
+    }
+    if(t->lid == lid){
+        *argv = t;
+        return;
+    } else{
+        if(!first)
+            if(head->lid == t->lid){
+                argv = NULL;
+                return;
+            }
+        found_listener(lid,head,t->next,argv,0);
+    }
+}
+
+struct key_listener* found_listener_id(int lid){
+    struct task_struct *argv = NULL;
+    found_listener(lid,head_listener,head_listener,&argv,1);
+    if(argv == NULL){
+        printf("Cannot found key listener id:[%d].\n",lid);
+        return NULL;
+    }
+    return argv;
+}
+
+void remove_listener(int lid){
+    struct key_listener *argv = found_listener_id(lid);
+    if(argv == NULL){
+        printf("Cannot found listener id:[%d].\n",lid);
+        return;
+    }
+    if(argv->lid == 0){
+        printf("[\033driver\036]: Cannot remove default listener.\n");
+        return;
+    }
+
+    kfree(argv);
+    struct key_listener *head = head_listener;
+    struct key_listener *last = NULL;
+    while (1){
+        if(head->lid == argv->lid){
+            last->next = argv->next;
+            return;
+        }
+        last = head;
+        head = head->next;
+    }
+}
+
 void add_listener(struct key_listener* listener){
     if(listener == NULL) return;
 

include/io.h

@@ -36,6 +36,8 @@ void load_idtr(int limit, int addr);
 
 uint16_t inw(uint16_t port);
 
+void copy_page_physical(uint32_t,uint32_t);
+
 extern char read_port(unsigned short port);
 
 static inline void outb(uint16_t port, uint8_t data) {

include/keyboard.h

@@ -18,6 +18,7 @@ typedef struct {
 }KEY_MAP;
 
 typedef struct key_listener{
+    int lid;
     void (*func)(uint32_t key,int release,char c);
     struct key_listener *next;
 }kl_t;
@@ -25,5 +26,6 @@ typedef struct key_listener{
 void init_keyboard();
 int handle_keyboard_input();
 void add_listener(struct key_listener* listener);
+void remove_listener(int lid);
 
 #endif //CRASHPOWEROS_KEYBOARD_H

include/memory.h

@@ -63,6 +63,8 @@ uint32_t first_frame();
 
 void page_fault(registers_t *regs);
 
+page_directory_t *clone_directory(page_directory_t *src);
+
 void flush_tlb();
 
 void *ksbrk(int incr);

include/pcat.h

@@ -0,0 +1,13 @@
+#ifndef CRASHPOWEROS_PCAT_H
+#define CRASHPOWEROS_PCAT_H
+
+#include "task.h"
+#include "fat16.h"
+
+struct pcat_process{
+    uint8_t is_e;
+};
+
+void pcat_launch(struct task_struct *father,struct File *file);
+
+#endif

include/syscall.h

@@ -0,0 +1,58 @@
+#ifndef CRASHPOWEROS_SYSCALL_H
+#define CRASHPOWEROS_SYSCALL_H
+
+#include <stddef.h>
+
+#define SYSCALL_NUM 10
+
+#define DEFN_SYSCALL0(fn, num) \
+int syscall_##fn() \
+{ \
+  int a; \
+  asm volatile("int $0x80" : "=a" (a) : "0" (num)); \
+  return a; \
+}
+
+#define DEFN_SYSCALL1(fn, num, P1) \
+int syscall_##fn(P1 p1) \
+{ \
+  int a; \
+  asm volatile("int $0x80" : "=a" (a) : "0" (num), "b" ((int)p1)); \
+  return a; \
+}
+
+#define DEFN_SYSCALL2(fn, num, P1, P2) \
+int syscall_##fn(P1 p1, P2 p2) \
+{ \
+  int a; \
+  asm volatile("int $0x80" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2)); \
+  return a; \
+}
+
+#define DEFN_SYSCALL3(fn, num, P1, P2, P3) \
+int syscall_##fn(P1 p1, P2 p2, P3 p3) \
+{ \
+  int a; \
+  asm volatile("int $0x80" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2), "d"((int)p3)); \
+  return a; \
+}
+
+#define DEFN_SYSCALL4(fn, num, P1, P2, P3, P4) \
+int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4) \
+{ \
+  int a; \
+  asm volatile("int $0x80" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2), "d" ((int)p3), "S" ((int)p4)); \
+  return a; \
+}
+
+#define DEFN_SYSCALL5(fn, num) \
+int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5) \
+{ \
+  int a; \
+  asm volatile("int $0x80" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2), "d" ((int)p3), "S" ((int)p4), "D" ((int)p5)); \
+  return a; \
+}
+
+void syscall_install();
+
+#endif

kernel/kernel.c

@@ -11,6 +11,7 @@
 #include "../include/shell.h"
 #include "../include/date.h"
 #include "../include/acpi.h"
+#include "../include/syscall.h"
 
 extern uint32_t end;
 extern int status;
@@ -60,6 +61,7 @@ void kernel_main(multiboot_t *multiboot) {
     init_keyboard();
     printf("[\035kernel\036]: Keyboard driver load success!\n");
 
+    syscall_install();
     print_cpu_id();
     io_sti();
 

kernel/page.c

@@ -46,14 +46,14 @@ uint32_t first_frame() {
             }
         }
     }
-    return (uint32_t) -1;
+    return (uint32_t) - 1;
 }
 
 void alloc_frame(page_t *page, int is_kernel, int is_writable) {
     if (page->frame) return;
     else {
         uint32_t idx = first_frame();
-        if (idx == (uint32_t) -1) {
+        if (idx == (uint32_t) - 1) {
             printf("FRAMES_FREE_ERROR: Cannot free frames!\n");
             asm("cli");
             for (;;)io_hlt();
@@ -110,57 +110,95 @@ void page_fault(registers_t *regs) {
 
     printf("[ERROR]: Page fault |");
     if (present) {
-        printf("Type: present;\n\taddress: %x  ", faulting_address);
+        printf("Type: present;\n\taddress: %x  \n", faulting_address);
-        if(current->pid == 0){
+        if (current->pid == 0) {
-            printf(" ======= Kernel Error ======= ");
+            printf(" ======= Kernel Error ======= \n");
             while (1) io_hlt();
-        } else{
+        } else {
             current->state = TASK_ZOMBIE;
-            printf("Taskkill process PID:%d Name:%s",current->pid,current->name);
+            printf("Taskkill process PID:%d Name:%s\n", current->pid, current->name);
         }
-    }
+    } else if (rw) {
-    else if (rw) {
         printf("Type: read-only;\n\taddress: %x", faulting_address);
-        if(current->pid == 0){
+        if (current->pid == 0) {
             printf(" ======= Kernel Error ======= ");
             while (1) io_hlt();
-        } else{
+        } else {
             current->state = TASK_ZOMBIE;
-            printf("Taskkill process PID:%d Name:%s",current->pid,current->name);
+            printf("Taskkill process PID:%d Name:%s", current->pid, current->name);
         }
-    }
+    } else if (us) {
-    else if (us) {
         printf("Type: user-mode;\n\taddres: %x", faulting_address);
-        if(current->pid == 0){
+        if (current->pid == 0) {
             printf(" ======= Kernel Error ======= ");
             while (1) io_hlt();
-        } else{
+        } else {
             current->state = TASK_ZOMBIE;
-            printf("Taskkill process PID:%d Name:%s",current->pid,current->name);
+            printf("Taskkill process PID:%d Name:%s", current->pid, current->name);
         }
-    }
+    } else if (reserved) {
-    else if (reserved) {
         printf("Type: reserved;\n\taddress: %x", faulting_address);
-        if(current->pid == 0){
+        if (current->pid == 0) {
             printf(" ======= Kernel Error ======= ");
             while (1) io_hlt();
-        } else{
+        } else {
             current->state = TASK_ZOMBIE;
-            printf("Taskkill process PID:%d Name:%s",current->pid,current->name);
+            printf("Taskkill process PID:%d Name:%s", current->pid, current->name);
         }
-    }
+    } else if (id) {
-    else if (id) {
+        printf("Type: decode address;\n\taddress: %x\n", faulting_address);
-        printf("Type: decode address;\n\taddress: %x", faulting_address);
+        if (current->pid == 0) {
-        if(current->pid == 0){
+            printf(" ======= Kernel Error ======= \n");
-            printf(" ======= Kernel Error ======= ");
             while (1) io_hlt();
-        } else{
+        } else {
             current->state = TASK_ZOMBIE;
-            printf("Taskkill process PID:%d Name:%s",current->pid,current->name);
+            printf("Taskkill process PID:%d Name:%s\n", current->pid, current->name);
         }
     }
 }
 
+static page_table_t *clone_table(page_table_t *src, uint32_t *physAddr) {
+    page_table_t *table = (page_table_t *) kmalloc_ap(sizeof(page_table_t), physAddr);
+    memset(table, 0, sizeof(page_directory_t));
+
+    int i;
+    for (i = 0; i < 1024; i++) {
+        if (!src->pages[i].frame)
+            continue;
+        alloc_frame(&table->pages[i], 0, 0);
+        if (src->pages[i].present) table->pages[i].present = 1;
+        if (src->pages[i].rw) table->pages[i].rw = 1;
+        if (src->pages[i].user) table->pages[i].user = 1;
+        if (src->pages[i].accessed)table->pages[i].accessed = 1;
+        if (src->pages[i].dirty) table->pages[i].dirty = 1;
+        copy_page_physical(src->pages[i].frame * 0x1000, table->pages[i].frame * 0x1000);
+    }
+    return table;
+}
+
+page_directory_t *clone_directory(page_directory_t *src) {
+    uint32_t phys;
+    page_directory_t *dir = (page_directory_t *) kmalloc_ap(sizeof(page_directory_t), &phys);
+    memset(dir, 0, sizeof(page_directory_t));
+
+    uint32_t offset = (uint32_t) dir->tablesPhysical - (uint32_t) dir;
+    dir->physicalAddr = phys + offset;
+    int i;
+    for (i = 0; i < 1024; i++) {
+        if (!src->tables[i])
+            continue;
+        if (kernel_directory->tables[i] == src->tables[i]) {
+            dir->tables[i] = src->tables[i];
+            dir->tablesPhysical[i] = src->tablesPhysical[i];
+        } else {
+            uint32_t phys;
+            dir->tables[i] = clone_table(src->tables[i], &phys);
+            dir->tablesPhysical[i] = phys | 0x07;
+        }
+    }
+    return dir;
+}
+
 void init_page() {
     uint32_t mem_end_page = 0xFFFFFFFF; // 4GB Page
 

kernel/syscall.c

@@ -0,0 +1,29 @@
+#include "../include/syscall.h"
+#include "../include/isr.h"
+
+void syscall_handler(registers_t *regs){
+    if (regs->eax >= SYSCALL_NUM)
+        return;
+
+    void *location = NULL;//syscalls[regs->eax];
+
+    int ret;
+    asm volatile (" \
+      push %1; \
+      push %2; \
+      push %3; \
+      push %4; \
+      push %5; \
+      call *%6; \
+      pop %%ebx; \
+      pop %%ebx; \
+      pop %%ebx; \
+      pop %%ebx; \
+      pop %%ebx; \
+    " : "=a" (ret) : "r" (regs->edi), "r" (regs->esi), "r" (regs->edx), "r" (regs->ecx), "r" (regs->ebx), "r" (location));
+    regs->eax = ret;
+}
+
+void syscall_install(){
+    register_interrupt_handler(0x80,syscall_handler);
+}

kernel/task.c

@@ -95,7 +95,7 @@ struct task_struct* found_task_pid(int pid){
     found_task(pid,running_proc_head,running_proc_head,&argv,1);
     if(argv == NULL){
         printf("Cannot found task Pid:[%d].\n",pid);
-        return;
+        return NULL;
     }
     return argv;
 }
@@ -167,7 +167,7 @@ void change_task_to(struct task_struct *next) {
         struct task_struct *prev = current;
         current = next;
 
-        //switch_page_directory(current->pgd_dir);
+        switch_page_directory(current->pgd_dir);
         switch_to(&(prev->context), &(current->context));
 
     }
@@ -183,7 +183,7 @@ int32_t kernel_thread(int (*fn)(void *), void *arg,char* name) {
     new_task->state = TASK_RUNNABLE;
     new_task->stack = current;
     new_task->pid = now_pid++;
-    new_task->pgd_dir = (page_directory_t *) kmalloc_a(sizeof(page_directory_t));
+    new_task->pgd_dir = kernel_directory;
 
     new_task->name = name;
 

sysapp/pcat.c

@@ -0,0 +1,40 @@
+#include "../include/pcat.h"
+#include "../include/keyboard.h"
+#include <stddef.h>
+
+struct task_struct *father_pcat;
+struct pcat_process *this_process;
+uint32_t pid_pcat;
+extern KEY_STATUS *key_status;
+
+void pcat_key_listener(uint32_t key,int release,char c){
+
+}
+
+void start_pcat_thread(){
+    this_process = (struct pcat_process*) kmalloc(sizeof(struct pcat_process));
+    struct key_listener *listener = (struct key_listener*) kmalloc(sizeof(struct key_listener));
+    listener->func = pcat_key_listener;
+    listener->func = 2;
+    add_listener(listener);
+    while (1){
+        if(key_status->is_ctrl){
+            if(this_process->is_e){
+                kfree(this_process);
+                start_task(father_pcat);
+                task_kill(get_current());
+            }
+        }
+
+
+    }
+}
+
+void pcat_launch(struct task_struct *father,struct File *file){
+    father_pcat = father;
+    pid_pcat = kernel_thread(start_pcat_thread,NULL,"CPOS-PCAT");
+    wait_task(father);
+    while (1){
+        if(father->state != TASK_SLEEPING) break;
+    }
+}

sysapp/shell.c

@@ -5,8 +5,7 @@
 #include "../include/task.h"
 #include "../include/cmos.h"
 #include "../include/fat16.h"
-#include "../include/timer.h"
+#include "../include/pcat.h"
-#include "../include/io.h"
 
 extern Queue *key_char_queue;
 
@@ -211,6 +210,23 @@ void cmd_debug(){
     printf("ESI: 0x%08x | EDI 0x%08x | EBP 0x%08x | EFLAGS 0x%08x\n",esi,edi,ebp,get_current()->context.eflags);
 }
 
+void cmd_pcat(int argc,char **argv){
+    if (argc == 1) {
+
+        return;
+    }
+    char name[8] = {0};
+    char ext[3] = {0};
+    analyse_fullname(argv[1], name, ext);
+    int isfind = find_file(name, ext, 0);
+    struct File* file;
+    if(isfind){
+        file = open_file(argv[1]);
+    } else file = create_file(argv[1]);
+
+    pcat_launch(get_current(),file);
+}
+
 void setup_shell(){
     vga_clear();
     printf("%s for x86 [Version %s] \n",OS_NAME, OS_VERSION);
@@ -256,6 +272,8 @@ void setup_shell(){
             cmd_shutdown();
         else if (!strcmp("debug", argv[0]))
             cmd_debug();
+        else if (!strcmp("pcat", argv[0]))
+            cmd_pcat(argc,argv);
         else if (!strcmp("help", argv[0]) || !strcmp("?", argv[0]) || !strcmp("h", argv[0])) {
             vga_writestring("-=[\037CrashPowerShell Helper\036]=-\n");
             vga_writestring("help ? h              \032Print shell help info.\036\n");
@@ -271,6 +289,7 @@ void setup_shell(){
             vga_writestring("reset                 \032Reset OS.\036\n");
             vga_writestring("shutdown exit         \032Shutdown OS.\036\n");
             vga_writestring("debug                 \032Print os debug info.\036\n");
+            vga_writestring("pcat [filename]       \032Launch pcat application.\036\n");
         } else printf("\033[Shell]: Unknown command '%s'.\036\n", argv[0]);
     }
 }