feature (base): started basic libc setup

CMakeLists.txt

@@ -8,13 +8,13 @@ set(CMAKE_NASM_COMPILE_OBJECT "nasm <INCLUDES> <FLAGS> -o <OBJECT> <SOURCE>")
 add_library(libc)
 add_library(libc_asm OBJECT)
 target_include_directories(libc PRIVATE inc)
-file(GLOB_RECURSE libc_src_c   "src/**/*.c")
+file(GLOB_RECURSE libc_src_c   "src/**.c")
-file(GLOB_RECURSE libc_inc     "inc/**/*.h")
+file(GLOB_RECURSE libc_inc     "inc/**.h")
-file(GLOB_RECURSE libc_src_asm "src/**/*.asm")
+file(GLOB_RECURSE libc_src_asm "src/**.asm")
 
 
-target_compile_options(libc PRIVATE "-g -fno-stack-protector -fno-stack-check -ffreestanding -m64 -march=x86-64 -mabi=sysv")
+target_compile_options(libc PRIVATE -g -fno-stack-protector -fno-stack-check -ffreestanding -m64 -march=x86-64 -mabi=sysv)
-target_link_options(libc PRIVATE "-Bsymbolic -nostdlib -shared -fno-stack-protector")
+target_link_options(libc PRIVATE -Bsymbolic -nostdlib -shared -fno-stack-protector)
 
 enable_language(ASM_NASM)
 set(CAN_USE_ASSEMBLER TRUE)

inc/nox/status.h

@@ -0,0 +1,13 @@
+// This file is part of noxos and licensed under the MIT open source license
+
+#ifndef NOX_LIBC_STATUS_H
+#define NOX_LIBC_STATUS_H
+
+typedef enum {
+    STATUS_SUCCESS,
+
+    STATUS_PERMISSION_DENIED,
+    STATUS_RESOURCE_NOT_AVAILABLE
+} status_E;
+
+#endif //NOX_LIBC_STATUS_H

inc/nox/stdio.h

@@ -0,0 +1,23 @@
+#ifndef NOX_LIBC_SYSCALL_H
+#define NOX_LIBC_SYSCALL_H
+
+#include "stdtypes.h"
+#include "string.h"
+
+typedef uint32_t file_t;
+
+enum {
+    FD_INVALID,
+    STDOUT,
+    STDIN,
+    STDERR
+};
+
+file_t      fopen   (string_t path);
+void        fclose  (file_t file);
+uint32_t    fread   (file_t file, uint32_t offset, void* buffer, uint32_t num);
+uint32_t    fwrite  (file_t file, uint32_t offset, void* buffer, uint32_t num);
+
+void        printf  (string_t format);
+
+#endif //NOX_LIBC_SYSCALL_H

inc/nox/stdtypes.h

@@ -0,0 +1,22 @@
+// This file is part of noxos and licensed under the MIT open source license
+
+#ifndef NOX_LIBC_STDTYPES_H
+#define NOX_LIBC_STDTYPES_H
+
+typedef unsigned char  uint8_t;
+typedef   signed char   int8_t;
+typedef unsigned short uint16_t;
+typedef   signed short  int16_t;
+typedef unsigned int   uint32_t;
+typedef   signed int    int32_t;
+typedef unsigned long  uint64_t;
+typedef   signed long   int64_t;
+
+typedef _Bool bool;
+
+#define true  1
+#define false 0
+
+#define NULL (void*)0
+
+#endif //NOX_LIBC_STDTYPES_H

inc/nox/string.h

@@ -0,0 +1,12 @@
+// This file is part of noxos and licensed under the MIT open source license
+
+#ifndef NOX_LIBC_STRING_H
+#define NOX_LIBC_STRING_H
+
+#include "nox/stdtypes.h"
+
+typedef const char* string_t;
+
+uint64_t strlen(string_t str);
+
+#endif //NOX_LIBC_STRING_H

inc/syscall.h

@@ -0,0 +1,45 @@
+// This file is part of noxos and licensed under the MIT open source license
+
+#ifndef LIBC_SYSCALL_H
+#define LIBC_SYSCALL_H
+
+#include "nox/status.h"
+#include "nox/stdtypes.h"
+
+typedef enum {
+    SYSCALL_FILES_OPEN                  = 0x0101,
+    SYSCALL_FILES_CLOSE                 = 0x0102,
+    SYSCALL_FILES_READ                  = 0x0103,
+    SYSCALL_FILES_WRITE                 = 0x0104,
+    SYSCALL_FILES_DELETE                = 0x0105,
+    SYSCALL_FILES_LIST                  = 0x0106,
+    SYSCALL_FILES_INFO                  = 0x0107,
+
+    SYSCALL_MEMORY_MAP                  = 0x0201,
+    SYSCALL_MEMORY_UNMAP                = 0x0202,
+    SYSCALL_MEMORY_LABEL                = 0x0203,
+    SYSCALL_MEMORY_RANGE                = 0x0204,
+    SYSCALL_MEMORY_ACCESS               = 0x0205,
+
+    SYSCALL_PROCESS_CREATE              = 0x0301,
+    SYSCALL_PROCESS_ENVFILE             = 0x0302,
+    SYSCALL_PROCESS_START               = 0x0303,
+    SYSCALL_PROCESS_SIGNAL              = 0x0304,
+
+    SYSCALL_RUNTIME_LINKER_OPEN         = 0x0401,
+    SYSCALL_RUNTIME_LINKER_CLOSE        = 0x0402,
+    SYSCALL_RUNTIME_LINKER_LOAD_SYMBOL  = 0x0403,
+    SYSCALL_RUNTIME_LINKER_STATUS       = 0x0404,
+    SYSCALL_RUNTIME_LINKER_STANDARD_MOD = 0x0405,
+
+    SYSCALL_COMPATABILITY_ABI_TYPE      = 0x0501,
+    SYSCALL_COMPATABILITY_ABI_VERSION   = 0x0502,
+    SYSCALL_COMPATABILITY_ACTION        = 0x0503,
+
+    SYSCALL_KERNEL_SCHEDULER_START      = 0xFF00,
+    SYSCALL_KERNEL_PANIC                = 0xFF01
+} syscall_E;
+
+extern status_E syscall_perform(uint64_t id, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4);
+
+#endif //LIBC_SYSCALL_H

src/stdio.c

@@ -0,0 +1,26 @@
+// This file is part of noxos and licensed under the MIT open source license
+
+#include "nox/stdio.h"
+#include "syscall.h"
+
+file_t fopen(string_t path) {
+    file_t fd;
+    syscall_perform(SYSCALL_FILES_OPEN, (uint64_t)path, 0, (uint64_t)&fd, 0);
+    return fd;
+}
+
+void fclose(file_t file) {
+    syscall_perform(SYSCALL_FILES_CLOSE, file, 0, 0, 0);
+}
+
+uint32_t fread(file_t file, uint32_t offset, void* buffer, uint32_t num) {
+    syscall_perform(SYSCALL_FILES_READ, file, offset, (uint64_t)buffer, num);
+}
+
+uint32_t fwrite(file_t file, uint32_t offset, void* buffer, uint32_t num) {
+    syscall_perform(SYSCALL_FILES_WRITE, file, offset, (uint64_t)buffer, num);
+}
+
+void printf(string_t format) {
+    fwrite(STDOUT, 0, (void*)format, strlen(format));
+}

src/string.c

@@ -0,0 +1,9 @@
+// This file is part of noxos and licensed under the MIT open source license
+
+#include "nox/string.h"
+
+uint64_t strlen(string_t str) {
+    uint64_t n = 0;
+    while (*str++ != '\0') n++;
+    return n;
+}