实现用户程序退出处理

apps/def.mk

@@ -10,7 +10,7 @@ NASM = nasm
 LIBS_PATH := ../libo
 
 LD = ld
-LD_FLAGS = -Ttext 0xb0000010 -m elf_i386 -static -e main
+LD_FLAGS = -Ttext 0xb0000010 -m elf_i386 -static -e _start
 LINK = $(LD) $(LD_FLAGS)
 
 BASIC_LIB_C = $(LIBS_PATH)/libp.a

apps/include/libc.h

@@ -0,0 +1,4 @@
+#ifndef CRASHPOWEROS_LIBC_H
+#define CRASHPOWEROS_LIBC_H
+
+#endif

apps/include/stdio.h

@@ -3,7 +3,11 @@
 
 #include <stdint.h>
 #include <stddef.h>
+#include <stdarg.h>
 
 void put_char(char a);
+int printf(const char* fmt, ...);
+int puts(const char *s);
+int vsprintf(char *buf, const char *fmt, va_list args);
 
 #endif

apps/include/string.h

@@ -0,0 +1,16 @@
+#ifndef CRASHPOWEROS_STRING_H
+#define CRASHPOWEROS_STRING_H
+
+#include <stddef.h>
+
+int isspace(int c);
+int isdigit(int c);
+int isalpha(int c);
+int isupper(int c);
+size_t strnlen(const char *s, size_t maxlen);
+size_t strlen(const char *str);
+int strcmp(const char *s1, const char *s2);
+char *strcpy(char *dest, const char *src);
+char *strcat(char *dest, const char *src);
+
+#endif

apps/include/syscall.h

@@ -1,30 +1,21 @@
 #ifndef CRASHPOWEROS_SYSCALL_H
 #define CRASHPOWEROS_SYSCALL_H
 
-#define SYSCALL_PUTCHAR 1
+#define SYSCALL_PUTC 1
 #define SYSCALL_PRINT 2
 #define SYSCALL_GETC 3
+#define SYSCALL_MALLOC 4
+#define SYSCALL_FREE 5
+#define SYSCALL_EXIT 6
 
 #include <stdint.h>
+#include <stddef.h>
 
-static inline void syscall_print(char* c){
+void syscall_print(char* c);
-    uint32_t rets;
+void syscall_putchar(char c);
-    uint32_t __arg1 = c;
+char syscall_getc();
-    register uint32_t ebx asm("ebx")  = __arg1;
+void* syscall_malloc(size_t size);
-    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_PRINT), "r"(ebx) : "memory", "cc");
+void syscall_free(void *ptr);
-}
+void syscall_exit(int code);
-
-static inline void syscall_putchar(char c){
-    uint32_t rets;
-    uint32_t __arg1 = (uint32_t)(c);
-    register uint32_t ebx asm("ebx")  = __arg1;
-    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_PUTCHAR), "r"(ebx) : "memory", "cc");
-}
-
-static inline char syscall_getc(){
-    uint32_t rets;
-    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_GETC) : "memory", "cc");
-    return rets;
-}
 
 #endif

apps/init/init.c

@@ -1,34 +1,10 @@
-#include "../include/syscall.h"
+#include "../include/stdio.h"
-
-int gets(char *buf) {
-    int index = 0;
-    char c;
-    while ((c = syscall_getc()) != '\n') {
-        if (c == '\b') {
-            if (index > 0) {
-                index--;
-                syscall_print("\b \b");
-            }
-        } else {
-            buf[index++] = c;
-            syscall_putchar(c);
-        }
-    }
-    buf[index] = '\0';
-    syscall_putchar(c);
-    return index;
-}
 
 void hlt(){
     while (1);
 }
 
 int main(){
-    syscall_print("Debug info\n");
+    printf("User application %d\n",12);
-    //char* info;
+    return -1;
-    //gets(info);
+}
-    //syscall_print(info);
-    //put_char('A');
-    hlt();
-    return 0;
-}

apps/libs/Makefile

@@ -1,4 +1,4 @@
-OBJS_PACK = out/syscall.obj
+OBJS_PACK = out/syscall.obj out/print.obj out/string.obj out/libc.obj
 
 
 default : $(OBJS_PACK)

apps/libs/libc.c

@@ -0,0 +1,13 @@
+#include "../include/stdio.h"
+#include "../include/syscall.h"
+
+void put_char(char c){
+    syscall_putchar(c);
+}
+
+void _start(){
+    extern int main();
+    int ret = main();
+    syscall_exit(ret);
+    while (1);
+}

apps/libs/print.c

@@ -0,0 +1,288 @@
+#include "../include/stdio.h"
+#include "../include/syscall.h"
+#include "../include/string.h"
+
+static int skip_atoi(const char **s) {
+    int i = 0;
+
+    while (isdigit(**s))
+        i = i * 10 + *((*s)++) - '0';
+    return i;
+}
+
+#define ZEROPAD    1        /* pad with zero */
+#define SIGN    2        /* unsigned/signed long */
+#define PLUS    4        /* show plus */
+#define SPACE    8        /* space if plus */
+#define LEFT    16        /* left justified */
+#define SMALL    32        /* Must be 32 == 0x20 */
+#define SPECIAL    64        /* 0x */
+
+#define __do_div(n, base) ({ \
+int __res; \
+__res = ((unsigned long) n) % (unsigned) base; \
+n = ((unsigned long) n) / (unsigned) base; \
+__res; })
+
+int printf(const char* fmt, ...) {
+    static char buf[4096];
+    va_list     va;
+    va_start(va, fmt);
+    int rets = vsprintf(buf, fmt, va);
+    va_end(va);
+    syscall_print(buf);
+    return rets;
+}
+
+int puts(const char *s) {
+    syscall_print(s);
+    syscall_print("\n");
+    return 0;
+}
+
+static char *number(char *str, long num, int base, int size, int precision,
+                    int type) {
+    static const char digits[16] = "0123456789ABCDEF";
+
+    char tmp[66];
+    char c, sign, locase;
+    int i;
+
+    locase = (type & SMALL);
+    if (type & LEFT)
+        type &= ~ZEROPAD;
+    if (base < 2 || base > 16)
+        return NULL;
+    c = (type & ZEROPAD) ? '0' : ' ';
+    sign = 0;
+    if (type & SIGN) {
+        if (num < 0) {
+            sign = '-';
+            num = -num;
+            size--;
+        } else if (type & PLUS) {
+            sign = '+';
+            size--;
+        } else if (type & SPACE) {
+            sign = ' ';
+            size--;
+        }
+    }
+    if (type & SPECIAL) {
+        if (base == 16)
+            size -= 2;
+        else if (base == 8)
+            size--;
+    }
+    i = 0;
+    if (num == 0)
+        tmp[i++] = '0';
+    else
+        while (num != 0)
+            tmp[i++] = (digits[__do_div(num, base)] | locase);
+    if (i > precision)
+        precision = i;
+    size -= precision;
+    if (!(type & (ZEROPAD + LEFT)))
+        while (size-- > 0)
+            *str++ = ' ';
+    if (sign)
+        *str++ = sign;
+    if (type & SPECIAL) {
+        if (base == 8)
+            *str++ = '0';
+        else if (base == 16) {
+            *str++ = '0';
+            *str++ = ('X' | locase);
+        }
+    }
+    if (!(type & LEFT))
+        while (size-- > 0)
+            *str++ = c;
+    while (i < precision--)
+        *str++ = '0';
+    while (i-- > 0)
+        *str++ = tmp[i];
+    while (size-- > 0)
+        *str++ = ' ';
+    return str;
+}
+
+int vsprintf(char *buf, const char *fmt, va_list args) {
+    int len;
+    unsigned long num;
+    int i, base;
+    char *str;
+    const char *s;
+
+    int flags;        /* flags to number() */
+
+    int field_width;    /* width of output field */
+    int precision;        /* min. # of digits for integers; max
+				   number of chars for from string */
+    int qualifier;        /* 'h', 'l', or 'L' for integer fields */
+
+    for (str = buf; *fmt; ++fmt) {
+        if (*fmt != '%') {
+            *str++ = *fmt;
+            continue;
+        }
+
+        /* process flags */
+        flags = 0;
+        repeat:
+        ++fmt;        /* this also skips first '%' */
+        switch (*fmt) {
+            case '-':
+                flags |= LEFT;
+                goto repeat;
+            case '+':
+                flags |= PLUS;
+                goto repeat;
+            case ' ':
+                flags |= SPACE;
+                goto repeat;
+            case '#':
+                flags |= SPECIAL;
+                goto repeat;
+            case '0':
+                flags |= ZEROPAD;
+                goto repeat;
+        }
+
+        /* get field width */
+        field_width = -1;
+        if (isdigit(*fmt))
+            field_width = skip_atoi(&fmt);
+        else if (*fmt == '*') {
+            ++fmt;
+            /* it's the next argument */
+            field_width = va_arg(args,
+            int);
+            if (field_width < 0) {
+                field_width = -field_width;
+                flags |= LEFT;
+            }
+        }
+
+        /* get the precision */
+        precision = -1;
+        if (*fmt == '.') {
+            ++fmt;
+            if (isdigit(*fmt))
+                precision = skip_atoi(&fmt);
+            else if (*fmt == '*') {
+                ++fmt;
+                /* it's the next argument */
+                precision = va_arg(args,
+                int);
+            }
+            if (precision < 0)
+                precision = 0;
+        }
+
+        /* get the conversion qualifier */
+        qualifier = -1;
+        if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L') {
+            qualifier = *fmt;
+            ++fmt;
+        }
+
+        /* default base */
+        base = 10;
+
+        switch (*fmt) {
+            case 'c':
+                if (!(flags & LEFT))
+                    while (--field_width > 0)
+                        *str++ = ' ';
+                *str++ = (unsigned char) va_arg(args,
+                int);
+                while (--field_width > 0)
+                    *str++ = ' ';
+                continue;
+
+            case 's':
+                s = va_arg(args,
+                char *);
+                len = strnlen(s, precision);
+
+                if (!(flags & LEFT))
+                    while (len < field_width--)
+                        *str++ = ' ';
+                for (i = 0; i < len; ++i)
+                    *str++ = *s++;
+                while (len < field_width--)
+                    *str++ = ' ';
+                continue;
+
+            case 'p':
+                if (field_width == -1) {
+                    field_width = 2 * sizeof(void *);
+                    flags |= ZEROPAD;
+                }
+                str = number(str, (unsigned long) va_arg(args,
+                void *), 16,
+                field_width, precision, flags);
+                continue;
+
+            case 'n':
+                if (qualifier == 'l') {
+                    long *ip = va_arg(args,
+                    long *);
+                    *ip = (str - buf);
+                } else {
+                    int *ip = va_arg(args,
+                    int *);
+                    *ip = (str - buf);
+                }
+                continue;
+
+            case '%':
+                *str++ = '%';
+                continue;
+
+                /* integer number formats - set up the flags and "break" */
+            case 'o':
+                base = 8;
+                break;
+
+            case 'x':
+                flags |= SMALL;
+            case 'X':
+                base = 16;
+                break;
+
+            case 'd':
+            case 'i':
+                flags |= SIGN;
+            case 'u':
+                break;
+
+            default:
+                *str++ = '%';
+                if (*fmt)
+                    *str++ = *fmt;
+                else
+                    --fmt;
+                continue;
+        }
+        if (qualifier == 'l')
+            num = va_arg(args,
+        unsigned long);
+        else if (qualifier == 'h') {
+            num = (unsigned short) va_arg(args,
+            int);
+            if (flags & SIGN)
+                num = (short) num;
+        } else if (flags & SIGN)
+            num = va_arg(args,
+        int);
+        else
+        num = va_arg(args,
+        unsigned int);
+        str = number(str, num, base, field_width, precision, flags);
+    }
+    *str = '\0';
+    return str - buf;
+}

apps/libs/string.c

@@ -0,0 +1,75 @@
+#include "../include/string.h"
+
+int isspace(int c) {
+    return (c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' ||
+            c == '\v');
+}
+
+// isdigit
+int isdigit(int c) {
+    return (c >= '0' && c <= '9');
+}
+
+// isalpha
+int isalpha(int c) {
+    return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
+}
+
+// isupper
+int isupper(int c) {
+    return (c >= 'A' && c <= 'Z');
+}
+
+size_t strnlen(const char *s, size_t maxlen) {
+    const char *es = s;
+    while (*es && maxlen) {
+        es++;
+        maxlen--;
+    }
+
+    return (es - s);
+}
+
+size_t strlen(const char *str) {
+    size_t len = 0;
+    while (str[len])
+        len++;
+    return len;
+}
+
+int strcmp(const char *s1, const char *s2) {
+    char is_equal = 1;
+
+    for (; (*s1 != '\0') && (*s2 != '\0'); s1++, s2++) {
+        if (*s1 != *s2) {
+            is_equal = 0;
+            break;
+        }
+    }
+
+    if (is_equal) {
+        if (*s1 != '\0') {
+            return 1;
+        } else if (*s2 != '\0') {
+            return -1;
+        } else {
+            return 0;
+        }
+    } else {
+        return (int) (*s1 - *s2);
+    }
+}
+
+char *strcpy(char *dest, const char *src) {
+    do {
+        *dest++ = *src++;
+    } while (*src != 0);
+    *dest = 0;
+}
+
+char *strcat(char *dest, const char *src) {
+    char *temp = dest;
+    while (*temp != '\0')
+        temp++;
+    while ((*temp++ = *src++) != '\0');
+}

apps/libs/syscall.c

@@ -1,2 +1,44 @@
 #include "../include/syscall.h"
 
+void syscall_print(char* c){
+    uint32_t rets;
+    uint32_t __arg1 = c;
+    register uint32_t ebx asm("ebx")  = __arg1;
+    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_PRINT), "r"(ebx) : "memory", "cc");
+}
+
+void syscall_putchar(char c){
+    uint32_t rets;
+    uint32_t __arg1 = (uint32_t)(c);
+    register uint32_t ebx asm("ebx")  = __arg1;
+    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_PUTC), "r"(ebx) : "memory", "cc");
+}
+
+char syscall_getc(){
+    uint32_t rets;
+    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_GETC) : "memory", "cc");
+    return rets;
+}
+
+void* syscall_malloc(size_t size){
+    uint32_t rets;
+    uint32_t __arg1 = (uint32_t)(size);
+    register uint32_t ebx asm("ebx")  = __arg1;
+    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_MALLOC), "r"(ebx) : "memory", "cc");
+    return rets;
+}
+
+void syscall_free(void *ptr){
+    uint32_t rets;
+    uint32_t __arg1 = (uint32_t)(ptr);
+    register uint32_t ebx asm("ebx")  = __arg1;
+    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_FREE), "r"(ebx) : "memory", "cc");
+}
+
+void syscall_exit(int code){
+    uint32_t rets;
+    uint32_t __arg1 = (uint32_t)(code);
+    register uint32_t ebx asm("ebx")  = __arg1;
+    asm volatile("int $31\n\t" : "=a"(rets) : "0"(SYSCALL_EXIT), "r"(ebx)  : "memory", "cc");
+    return rets;
+}

src/include/syscall.h

@@ -8,6 +8,9 @@
 #define SYSCALL_PUTC 1
 #define SYSCALL_PRINT 2
 #define SYSCALL_GETC 3
+#define SYSCALL_MALLOC 4
+#define SYSCALL_FREE 5
+#define SYSCALL_EXIT 6
 
 void syscall_install();
 

src/kernel/syscall.c

@@ -5,6 +5,8 @@
 #include "../include/graphics.h"
 #include "../include/io.h"
 #include "../include/shell.h"
+#include "../include/heap.h"
+
 
 static void syscall_puchar(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){
     printf("%c",ebx);
@@ -15,13 +17,33 @@ static void syscall_print(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,ui
 }
 
 static char syscall_getc(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){
-    return getc();
+    io_sti();
+    char c = getc();
+    printf("SYSCALL: %c\n",c);
+    return c;
+}
+
+static void syscall_exit(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){
+    task_kill(get_current()->pid);
+    printf("PID[%d] exit code: %d",get_current()->pid,ebx);
+}
+
+static void* syscall_malloc(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){
+    void* address = user_alloc(get_current(),ebx);
+    return address;
+}
+
+static void syscall_free(uint32_t ebx,uint32_t ecx,uint32_t edx,uint32_t esi,uint32_t edi){
+    use_free(get_current(),ebx);
 }
 
 void *sycall_handlers[MAX_SYSCALLS] = {
         [SYSCALL_PUTC] = syscall_puchar,
         [SYSCALL_PRINT] = syscall_print,
         [SYSCALL_GETC] = syscall_getc,
+        [SYSCALL_MALLOC] = syscall_malloc,
+        [SYSCALL_FREE] = syscall_free,
+        [SYSCALL_EXIT] = syscall_exit,
 };
 
 typedef size_t (*syscall_t)(size_t, size_t, size_t, size_t, size_t);

src/kernel/task.c

@@ -145,8 +145,6 @@ void task_kill(int pid) {
     }
     argv->state = TASK_DEATH;
     printf("Taskkill process PID:%d Name:%s\n", argv->pid, argv->name);
-    printf("Task [%s] exit code: -130.\n", argv->name);
-
     kfree(argv);
     struct task_struct *head = running_proc_head;
     struct task_struct *last = NULL;

src/sysapp/shell.c

@@ -387,7 +387,6 @@ void setup_shell() {
     char *buffer[255];
 
     while (1) {
-        logk("DEBUG I\n");
         if(hasFS) vfs_getPath(buffer);
         else{
             buffer[0] = 'n';
@@ -397,11 +396,8 @@ void setup_shell() {
             buffer[4] = 's';
             buffer[5] = '\0';
         }
-        logk("DEBUG II\n");
         printf("\03343cd80;default@localhost: \0334169E1;%s\\\033c6c6c6;$ ", buffer);
-        logk("DEBUG III\n");
         if (gets(com, MAX_COMMAND_LEN) <= 0) continue;
-        logk("DEBUG IIII\n");
 
         argc = cmd_parse(com, argv, ' ');