CLI apps transfer to Userspace

src/kernel/kutils.c

@@ -0,0 +1,89 @@
+#include "kutils.h"
+#include "wm.h"
+#include "io.h"
+
+void k_memset(void *dest, int val, size_t len) {
+    unsigned char *ptr = (unsigned char *)dest;
+    while (len-- > 0) *ptr++ = (unsigned char)val;
+}
+
+void k_memcpy(void *dest, const void *src, size_t len) {
+    unsigned char *d = (unsigned char *)dest;
+    const unsigned char *s = (const unsigned char *)src;
+    while (len-- > 0) *d++ = *s++;
+}
+
+size_t k_strlen(const char *str) {
+    size_t len = 0;
+    while (str[len]) len++;
+    return len;
+}
+
+int k_strcmp(const char *s1, const char *s2) {
+    while (*s1 && (*s1 == *s2)) {
+        s1++;
+        s2++;
+    }
+    return *(const unsigned char*)s1 - *(const unsigned char*)s2;
+}
+
+void k_strcpy(char *dest, const char *src) {
+    while (*src) *dest++ = *src++;
+    *dest = 0;
+}
+
+int k_atoi(const char *str) {
+    int res = 0;
+    int sign = 1;
+    if (*str == '-') { sign = -1; str++; }
+    while (*str >= '0' && *str <= '9') {
+        res = res * 10 + (*str - '0');
+        str++;
+    }
+    return res * sign;
+}
+
+void k_itoa(int n, char *buf) {
+    if (n == 0) {
+        buf[0] = '0'; buf[1] = 0; return;
+    }
+    int i = 0;
+    int sign = n < 0;
+    if (sign) n = -n;
+    while (n > 0) {
+        buf[i++] = (n % 10) + '0';
+        n /= 10;
+    }
+    if (sign) buf[i++] = '-';
+    buf[i] = 0;
+    for (int j = 0; j < i / 2; j++) {
+        char t = buf[j];
+        buf[j] = buf[i - 1 - j];
+        buf[i - 1 - j] = t;
+    }
+}
+
+void k_delay(int iterations) {
+    for (volatile int i = 0; i < iterations; i++) {
+        __asm__ __volatile__("nop");
+    }
+}
+
+void k_sleep(int ms) {
+    // Timer is ~60Hz, so 1 tick = 16.66ms
+    uint32_t ticks = ms / 16;
+    if (ticks == 0 && ms > 0) ticks = 1;
+    
+    uint32_t target = wm_get_ticks() + ticks;
+    while (wm_get_ticks() < target) {
+        __asm__ __volatile__("hlt");
+    }
+}
+
+void k_reboot(void) {
+    outb(0x64, 0xFE);
+}
+
+void k_shutdown(void) {
+    outw(0x604, 0x2000);
+}