feat: initial scalable x86_64 microkernel skeleton with Limine, Rust, C HAL, and C++20 IPC

lib/libc/include/stddef.h

@@ -0,0 +1,14 @@
+#pragma once
+
+typedef __SIZE_TYPE__ size_t;
+typedef __PTRDIFF_TYPE__ ptrdiff_t;
+typedef __INTPTR_TYPE__ intptr_t;
+typedef __UINTPTR_TYPE__ uintptr_t;
+
+#ifndef NULL
+#define NULL ((void*)0)
+#endif
+
+#ifndef offsetof
+#define offsetof(type, member) __builtin_offsetof(type, member)
+#endif

lib/libc/include/stdint.h

@@ -0,0 +1,24 @@
+#pragma once
+
+typedef __INT8_TYPE__   int8_t;
+typedef __INT16_TYPE__  int16_t;
+typedef __INT32_TYPE__  int32_t;
+typedef __INT64_TYPE__  int64_t;
+
+typedef __UINT8_TYPE__  uint8_t;
+typedef __UINT16_TYPE__ uint16_t;
+typedef __UINT32_TYPE__ uint32_t;
+typedef __UINT64_TYPE__ uint64_t;
+
+typedef __INTPTR_TYPE__  intptr_t;
+typedef __UINTPTR_TYPE__ uintptr_t;
+
+#define INT8_MAX   127
+#define INT16_MAX  32767
+#define INT32_MAX  2147483647
+#define INT64_MAX  9223372036854775807LL
+
+#define UINT8_MAX  255
+#define UINT16_MAX 65535
+#define UINT32_MAX 4294967295U
+#define UINT64_MAX 18446744073709551615ULL

lib/libc/include/stdio.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "stddef.h"
+#include "stdint.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int puts(const char *s);
+int putchar(int c);
+
+#ifdef __cplusplus
+}
+#endif

lib/libc/include/string.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "stddef.h"
+#include "stdint.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void *memset(void *dest, int c, size_t n);
+void *memcpy(void *dest, const void *src, size_t n);
+void *memmove(void *dest, const void *src, size_t n);
+int   memcmp(const void *s1, const void *s2, size_t n);
+
+size_t strlen(const char *s);
+int    strcmp(const char *s1, const char *s2);
+int    strncmp(const char *s1, const char *s2, size_t n);
+char  *strcpy(char *dest, const char *src);
+char  *strncpy(char *dest, const char *src, size_t n);
+
+#ifdef __cplusplus
+}
+#endif