Merge pull request #21 from SamTebbs33/feature/multiboot-info

This patch passes the multiboot header address and bootloader magic number provided by grub to the kmain function, and checks the magic number to make sure it is correct before initialising the rest of the system. Closes #19

src/kernel/arch/x86/arch.zig

@@ -96,6 +96,13 @@ export nakedcc fn start_higher_half() noreturn {
         \\mov $KERNEL_STACK_END, %%esp
         \\mov %%esp, %%ebp
     );
+    // Push the bootloader magic number and multiboot header address with virtual offset
+    asm volatile (
+        \\.extern KERNEL_ADDR_OFFSET
+        \\push %%eax
+        \\add $KERNEL_ADDR_OFFSET, %%ebx
+        \\push %%ebx
+    );
     kmain();
     while (true) {}
 }

src/kernel/kmain.zig

@@ -6,6 +6,7 @@
 //
 const builtin = @import("builtin");
 const arch = @import("arch.zig");
+const multiboot = @import("multiboot.zig");
 
 pub fn panic(msg: []const u8, error_return_trace: ?*builtin.StackTrace) noreturn {
     @setCold(true);
@@ -14,10 +15,13 @@ pub fn panic(msg: []const u8, error_return_trace: ?*builtin.StackTrace) noreturn
     while (true) {}
 }
 
-pub export fn kmain() void {
+pub export fn kmain(mb_info: *multiboot.multiboot_info_t, mb_magic: u32) void {
-    arch.init();
+    if (mb_magic == multiboot.MULTIBOOT_BOOTLOADER_MAGIC) {
-    terminal.initialize();
+        // Booted with compatible bootloader
-    terminal.write("Hello, kernel World!");
+        arch.init();
+        terminal.initialize();
+        terminal.write("Hello, kernel World!");
+    }
 }
 
 // Hardware text mode color constants

src/kernel/multiboot.zig

@@ -0,0 +1,483 @@
+// Autogenerated by zig translate-c
+pub const multiboot_uint8_t = u8;
+pub const multiboot_uint16_t = c_ushort;
+pub const multiboot_uint32_t = c_uint;
+pub const multiboot_uint64_t = c_ulonglong;
+pub const struct_multiboot_header = extern struct {
+    magic: multiboot_uint32_t,
+    flags: multiboot_uint32_t,
+    checksum: multiboot_uint32_t,
+    header_addr: multiboot_uint32_t,
+    load_addr: multiboot_uint32_t,
+    load_end_addr: multiboot_uint32_t,
+    bss_end_addr: multiboot_uint32_t,
+    entry_addr: multiboot_uint32_t,
+    mode_type: multiboot_uint32_t,
+    width: multiboot_uint32_t,
+    height: multiboot_uint32_t,
+    depth: multiboot_uint32_t,
+};
+pub const struct_multiboot_aout_symbol_table = extern struct {
+    tabsize: multiboot_uint32_t,
+    strsize: multiboot_uint32_t,
+    addr: multiboot_uint32_t,
+    reserved: multiboot_uint32_t,
+};
+pub const multiboot_aout_symbol_table_t = struct_multiboot_aout_symbol_table;
+pub const struct_multiboot_elf_section_header_table = extern struct {
+    num: multiboot_uint32_t,
+    size: multiboot_uint32_t,
+    addr: multiboot_uint32_t,
+    shndx: multiboot_uint32_t,
+};
+pub const multiboot_elf_section_header_table_t = struct_multiboot_elf_section_header_table;
+pub const struct_multiboot_info = extern struct {
+    flags: multiboot_uint32_t,
+    mem_lower: multiboot_uint32_t,
+    mem_upper: multiboot_uint32_t,
+    boot_device: multiboot_uint32_t,
+    cmdline: multiboot_uint32_t,
+    mods_count: multiboot_uint32_t,
+    mods_addr: multiboot_uint32_t,
+    u: extern union {
+        aout_sym: multiboot_aout_symbol_table_t,
+        elf_sec: multiboot_elf_section_header_table_t,
+    },
+    mmap_length: multiboot_uint32_t,
+    mmap_addr: multiboot_uint32_t,
+    drives_length: multiboot_uint32_t,
+    drives_addr: multiboot_uint32_t,
+    config_table: multiboot_uint32_t,
+    boot_loader_name: multiboot_uint32_t,
+    apm_table: multiboot_uint32_t,
+    vbe_control_info: multiboot_uint32_t,
+    vbe_mode_info: multiboot_uint32_t,
+    vbe_mode: multiboot_uint16_t,
+    vbe_interface_seg: multiboot_uint16_t,
+    vbe_interface_off: multiboot_uint16_t,
+    vbe_interface_len: multiboot_uint16_t,
+    framebuffer_addr: multiboot_uint64_t,
+    framebuffer_pitch: multiboot_uint32_t,
+    framebuffer_width: multiboot_uint32_t,
+    framebuffer_height: multiboot_uint32_t,
+    framebuffer_bpp: multiboot_uint8_t,
+    framebuffer_type: multiboot_uint8_t,
+    framebuffer: extern union {
+        framebuffer_palette: extern struct {
+            framebuffer_palette_addr: multiboot_uint32_t,
+            framebuffer_palette_num_colors: multiboot_uint16_t,
+        },
+        framebuffer_colours: extern struct {
+            framebuffer_red_field_position: multiboot_uint8_t,
+            framebuffer_red_mask_size: multiboot_uint8_t,
+            framebuffer_green_field_position: multiboot_uint8_t,
+            framebuffer_green_mask_size: multiboot_uint8_t,
+            framebuffer_blue_field_position: multiboot_uint8_t,
+            framebuffer_blue_mask_size: multiboot_uint8_t,
+        },
+    },
+};
+pub const multiboot_info_t = struct_multiboot_info;
+pub const struct_multiboot_color = extern struct {
+    red: multiboot_uint8_t,
+    green: multiboot_uint8_t,
+    blue: multiboot_uint8_t,
+};
+pub const struct_multiboot_mmap_entry = extern struct {
+    size: multiboot_uint32_t,
+    addr: multiboot_uint64_t,
+    len: multiboot_uint64_t,
+    type: multiboot_uint32_t,
+};
+pub const multiboot_memory_map_t = struct_multiboot_mmap_entry;
+pub const struct_multiboot_mod_list = extern struct {
+    mod_start: multiboot_uint32_t,
+    mod_end: multiboot_uint32_t,
+    cmdline: multiboot_uint32_t,
+    pad: multiboot_uint32_t,
+};
+pub const multiboot_module_t = struct_multiboot_mod_list;
+pub const struct_multiboot_apm_info = extern struct {
+    version: multiboot_uint16_t,
+    cseg: multiboot_uint16_t,
+    offset: multiboot_uint32_t,
+    cseg_16: multiboot_uint16_t,
+    dseg: multiboot_uint16_t,
+    flags: multiboot_uint16_t,
+    cseg_len: multiboot_uint16_t,
+    cseg_16_len: multiboot_uint16_t,
+    dseg_len: multiboot_uint16_t,
+};
+pub const __GCC_ATOMIC_TEST_AND_SET_TRUEVAL = 1;
+pub const __FLT16_MAX_EXP__ = 15;
+pub const __BIGGEST_ALIGNMENT__ = 16;
+pub const __SIZEOF_FLOAT__ = 4;
+pub const __INT64_FMTd__ = c"ld";
+pub const __STDC_VERSION__ = c_long(201112);
+pub const __INT_LEAST32_FMTi__ = c"i";
+pub const __INT_LEAST8_FMTi__ = c"hhi";
+pub const __LDBL_EPSILON__ = -nan;
+pub const __LZCNT__ = 1;
+pub const __INT_LEAST32_FMTd__ = c"d";
+pub const __STDC_UTF_32__ = 1;
+pub const __INVPCID__ = 1;
+pub const __SIG_ATOMIC_WIDTH__ = 32;
+pub const MULTIBOOT_MEMORY_BADRAM = 5;
+pub const __UINT_FAST64_FMTX__ = c"lX";
+pub const __GCC_ATOMIC_LLONG_LOCK_FREE = 2;
+pub const __clang_version__ = c"8.0.0 (tags/RELEASE_800/rc5)";
+pub const __UINT_LEAST8_FMTo__ = c"hho";
+pub const __SIZEOF_DOUBLE__ = 8;
+pub const __INTMAX_FMTd__ = c"ld";
+pub const __CLANG_ATOMIC_CHAR_LOCK_FREE = 2;
+pub const __INT_LEAST16_FMTi__ = c"hi";
+pub const __GCC_ATOMIC_SHORT_LOCK_FREE = 2;
+pub const __FMA__ = 1;
+pub const __MMX__ = 1;
+pub const __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 = 1;
+pub const __SIZE_FMTX__ = c"lX";
+pub const __WCHAR_WIDTH__ = 32;
+pub const __FSGSBASE__ = 1;
+pub const __PTRDIFF_FMTd__ = c"ld";
+pub const __DBL_MIN_EXP__ = -1021;
+pub const __FLT_EVAL_METHOD__ = 0;
+pub const __SSE_MATH__ = 1;
+pub const __UINT_FAST8_FMTo__ = c"hho";
+pub const __UINT_LEAST64_MAX__ = c_ulong(18446744073709551615);
+pub const MULTIBOOT_INFO_BOOT_LOADER_NAME = 512;
+pub const __UINT_LEAST64_FMTx__ = c"lx";
+pub const __INT8_MAX__ = 127;
+pub const MULTIBOOT_MEMORY_AVAILABLE = 1;
+pub const __DBL_HAS_DENORM__ = 1;
+pub const __FLOAT128__ = 1;
+pub const __FLT16_HAS_QUIET_NAN__ = 1;
+pub const __ATOMIC_RELAXED = 0;
+pub const __DBL_DECIMAL_DIG__ = 17;
+pub const MULTIBOOT_SEARCH = 8192;
+pub const __SIZEOF_SHORT__ = 2;
+pub const __UINT16_FMTX__ = c"hX";
+pub const __UINT_FAST16_MAX__ = 65535;
+pub const __CLANG_ATOMIC_SHORT_LOCK_FREE = 2;
+pub const __SSSE3__ = 1;
+pub const __CONSTANT_CFSTRINGS__ = 1;
+pub const __AVX2__ = 1;
+pub const __LDBL_MAX_EXP__ = 16384;
+pub const __WINT_MAX__ = c_uint(4294967295);
+pub const __NO_MATH_INLINES = 1;
+pub const __WCHAR_TYPE__ = int;
+pub const __LONG_MAX__ = c_long(9223372036854775807);
+pub const __STDC_HOSTED__ = 1;
+pub const MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT = 2;
+pub const __INT_FAST16_FMTi__ = c"hi";
+pub const __PTRDIFF_WIDTH__ = 64;
+pub const __INT_LEAST32_TYPE__ = int;
+pub const __SCHAR_MAX__ = 127;
+pub const __LDBL_DENORM_MIN__ = -nan;
+pub const __FLT16_MIN_EXP__ = -14;
+pub const MULTIBOOT_INFO_AOUT_SYMS = 16;
+pub const __INT64_C_SUFFIX__ = L;
+pub const __ELF__ = 1;
+pub const __LDBL_MANT_DIG__ = 64;
+pub const MULTIBOOT_HEADER_ALIGN = 4;
+pub const MULTIBOOT_INFO_CONFIG_TABLE = 256;
+pub const __CLANG_ATOMIC_INT_LOCK_FREE = 2;
+pub const __SIZEOF_PTRDIFF_T__ = 8;
+pub const __SIG_ATOMIC_MAX__ = 2147483647;
+pub const __UINT64_FMTX__ = c"lX";
+pub const __UINT64_MAX__ = c_ulong(18446744073709551615);
+pub const __DBL_MANT_DIG__ = 53;
+pub const __FLT_DECIMAL_DIG__ = 9;
+pub const __INT_LEAST32_MAX__ = 2147483647;
+pub const __DBL_DIG__ = 15;
+pub const __ATOMIC_ACQUIRE = 2;
+pub const __OPENCL_MEMORY_SCOPE_WORK_GROUP = 1;
+pub const __FLT16_HAS_DENORM__ = 1;
+pub const __UINT_FAST16_FMTu__ = c"hu";
+pub const __INTPTR_FMTi__ = c"li";
+pub const MULTIBOOT_INFO_MODS = 8;
+pub const __UINT_FAST8_FMTX__ = c"hhX";
+pub const __LITTLE_ENDIAN__ = 1;
+pub const __SSE__ = 1;
+pub const __FLT_HAS_QUIET_NAN__ = 1;
+pub const __SIZEOF_SIZE_T__ = 8;
+pub const __UINT_LEAST16_FMTo__ = c"ho";
+pub const __UINT8_FMTo__ = c"hho";
+pub const __UINT_LEAST16_FMTx__ = c"hx";
+pub const __CLANG_ATOMIC_WCHAR_T_LOCK_FREE = 2;
+pub const __UINT_FAST16_FMTX__ = c"hX";
+pub const __VERSION__ = c"4.2.1 Compatible Clang 8.0.0 (tags/RELEASE_800/rc5)";
+pub const __UINT_FAST32_FMTx__ = c"x";
+pub const __UINTPTR_MAX__ = c_ulong(18446744073709551615);
+pub const MULTIBOOT_INFO_ALIGN = 4;
+pub const __UINT_FAST8_FMTu__ = c"hhu";
+pub const __UINT_LEAST8_FMTu__ = c"hhu";
+pub const __UINT_LEAST64_FMTo__ = c"lo";
+pub const __UINT_LEAST8_MAX__ = 255;
+pub const __RDRND__ = 1;
+pub const __SIZEOF_WCHAR_T__ = 4;
+pub const __MOVBE__ = 1;
+pub const __LDBL_MAX__ = -nan;
+pub const __UINT16_MAX__ = 65535;
+pub const _LP64 = 1;
+pub const __x86_64 = 1;
+pub const __code_model_small_ = 1;
+pub const linux = 1;
+pub const __SIZEOF_WINT_T__ = 4;
+pub const MULTIBOOT_INFO_CMDLINE = 4;
+pub const __UINTMAX_FMTo__ = c"lo";
+pub const __FLT_DIG__ = 6;
+pub const __UINT_LEAST8_FMTX__ = c"hhX";
+pub const __INT16_MAX__ = 32767;
+pub const __WINT_UNSIGNED__ = 1;
+pub const __FLT_MAX_10_EXP__ = 38;
+pub const __UINTPTR_FMTX__ = c"lX";
+pub const __UINT_LEAST16_FMTu__ = c"hu";
+pub const __CLANG_ATOMIC_POINTER_LOCK_FREE = 2;
+pub const __WINT_WIDTH__ = 32;
+pub const __F16C__ = 1;
+pub const __SHRT_MAX__ = 32767;
+pub const __GCC_ATOMIC_BOOL_LOCK_FREE = 2;
+pub const __POINTER_WIDTH__ = 64;
+pub const __PTRDIFF_MAX__ = c_long(9223372036854775807);
+pub const __tune_corei7__ = 1;
+pub const __FLT16_DIG__ = 3;
+pub const __INT32_FMTd__ = c"d";
+pub const __DBL_MIN__ = -nan;
+pub const __SIZEOF_LONG__ = 8;
+pub const __INTPTR_WIDTH__ = 64;
+pub const MULTIBOOT_INFO_VBE_INFO = 2048;
+pub const __FLT16_MAX_10_EXP__ = 4;
+pub const __INT_FAST32_TYPE__ = int;
+pub const __NO_INLINE__ = 1;
+pub const __UINT_FAST32_FMTX__ = c"X";
+pub const MULTIBOOT_AOUT_KLUDGE = 65536;
+pub const __gnu_linux__ = 1;
+pub const __INT_FAST32_MAX__ = 2147483647;
+pub const __corei7__ = 1;
+pub const __UINTMAX_FMTu__ = c"lu";
+pub const MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED = 0;
+pub const __BMI__ = 1;
+pub const MULTIBOOT_INFO_BOOTDEV = 2;
+pub const __FLT_RADIX__ = 2;
+pub const MULTIBOOT_INFO_MEMORY = 1;
+pub const __FLT16_HAS_INFINITY__ = 1;
+pub const __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 = 1;
+pub const MULTIBOOT_FRAMEBUFFER_TYPE_RGB = 1;
+pub const __GCC_ATOMIC_INT_LOCK_FREE = 2;
+pub const __OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES = 3;
+pub const __FLT16_DECIMAL_DIG__ = 5;
+pub const __PRAGMA_REDEFINE_EXTNAME = 1;
+pub const __INT_FAST8_FMTd__ = c"hhd";
+pub const __INT32_TYPE__ = int;
+pub const MULTIBOOT_BOOTLOADER_MAGIC = 732803074;
+pub const __UINTMAX_WIDTH__ = 64;
+pub const __FLT_MIN__ = -nan;
+pub const __INT64_FMTi__ = c"li";
+pub const __UINT_FAST64_FMTu__ = c"lu";
+pub const __INT8_FMTd__ = c"hhd";
+pub const __INT_FAST16_TYPE__ = short;
+pub const __FLT_MAX_EXP__ = 128;
+pub const __XSAVE__ = 1;
+pub const __DBL_MAX_10_EXP__ = 308;
+pub const __LDBL_MIN__ = -nan;
+pub const __INT_FAST64_FMTi__ = c"li";
+pub const __INT_LEAST8_FMTd__ = c"hhd";
+pub const __CLANG_ATOMIC_LLONG_LOCK_FREE = 2;
+pub const __UINT_LEAST32_FMTX__ = c"X";
+pub const __UINTMAX_MAX__ = c_ulong(18446744073709551615);
+pub const __UINT_FAST16_FMTo__ = c"ho";
+pub const __LDBL_DECIMAL_DIG__ = 21;
+pub const __UINT_LEAST64_FMTX__ = c"lX";
+pub const __clang_minor__ = 0;
+pub const __SIZEOF_FLOAT128__ = 16;
+pub const __UINT_FAST64_FMTo__ = c"lo";
+pub const __SIZE_FMTx__ = c"lx";
+pub const __DBL_MAX__ = -nan;
+pub const __DBL_EPSILON__ = -nan;
+pub const __UINT64_FMTx__ = c"lx";
+pub const MULTIBOOT_HEADER = 1;
+pub const __CHAR_BIT__ = 8;
+pub const __INT16_FMTi__ = c"hi";
+pub const _DEBUG = 1;
+pub const __GNUC_MINOR__ = 2;
+pub const __UINT_FAST32_MAX__ = c_uint(4294967295);
+pub const __UINT8_FMTX__ = c"hhX";
+pub const __FLT_EPSILON__ = -nan;
+pub const __UINTPTR_WIDTH__ = 64;
+pub const __llvm__ = 1;
+pub const __UINT_FAST64_MAX__ = c_ulong(18446744073709551615);
+pub const __INT_FAST32_FMTi__ = c"i";
+pub const __FLT_HAS_INFINITY__ = 1;
+pub const __AES__ = 1;
+pub const __UINT8_FMTx__ = c"hhx";
+pub const __INTMAX_C_SUFFIX__ = L;
+pub const __ORDER_LITTLE_ENDIAN__ = 1234;
+pub const __GCC_ATOMIC_CHAR16_T_LOCK_FREE = 2;
+pub const __INT16_FMTd__ = c"hd";
+pub const __UINT32_FMTX__ = c"X";
+pub const __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 = 1;
+pub const __UINT32_C_SUFFIX__ = U;
+pub const __INT32_MAX__ = 2147483647;
+pub const __GCC_ATOMIC_CHAR_LOCK_FREE = 2;
+pub const __INTMAX_WIDTH__ = 64;
+pub const __CLANG_ATOMIC_BOOL_LOCK_FREE = 2;
+pub const __SIZE_FMTo__ = c"lo";
+pub const __DBL_HAS_QUIET_NAN__ = 1;
+pub const __INT_FAST8_FMTi__ = c"hhi";
+pub const __UINT_LEAST32_FMTo__ = c"o";
+pub const __STDC_UTF_16__ = 1;
+pub const __UINT_LEAST32_MAX__ = c_uint(4294967295);
+pub const __ATOMIC_RELEASE = 3;
+pub const __UINT_FAST16_FMTx__ = c"hx";
+pub const __UINTMAX_C_SUFFIX__ = UL;
+pub const __FLT_MIN_EXP__ = -125;
+pub const __SIZEOF_LONG_DOUBLE__ = 16;
+pub const __UINT_LEAST64_FMTu__ = c"lu";
+pub const MULTIBOOT_MOD_ALIGN = 4096;
+pub const __GCC_ATOMIC_LONG_LOCK_FREE = 2;
+pub const __ORDER_PDP_ENDIAN__ = 3412;
+pub const MULTIBOOT_PAGE_ALIGN = 1;
+pub const __INT_FAST64_FMTd__ = c"ld";
+pub const __CLANG_ATOMIC_LONG_LOCK_FREE = 2;
+pub const __GXX_ABI_VERSION = 1002;
+pub const __INT16_TYPE__ = short;
+pub const __SSE2_MATH__ = 1;
+pub const __FLT_MANT_DIG__ = 24;
+pub const __UINT_FAST64_FMTx__ = c"lx";
+pub const __STDC__ = 1;
+pub const __INT_FAST8_MAX__ = 127;
+pub const __INTPTR_FMTd__ = c"ld";
+pub const __GNUC_PATCHLEVEL__ = 1;
+pub const __UINT_LEAST8_FMTx__ = c"hhx";
+pub const __SIZE_WIDTH__ = 64;
+pub const __INT_LEAST64_FMTi__ = c"li";
+pub const __SSE4_2__ = 1;
+pub const __AVX__ = 1;
+pub const __INT_FAST16_MAX__ = 32767;
+pub const __INTPTR_MAX__ = c_long(9223372036854775807);
+pub const __CLANG_ATOMIC_CHAR16_T_LOCK_FREE = 2;
+pub const __UINT64_FMTu__ = c"lu";
+pub const __BYTE_ORDER__ = __ORDER_LITTLE_ENDIAN__;
+pub const __SSE2__ = 1;
+pub const MULTIBOOT_INFO_FRAMEBUFFER_INFO = 4096;
+pub const __INT_MAX__ = 2147483647;
+pub const __INTMAX_FMTi__ = c"li";
+pub const __DBL_DENORM_MIN__ = -nan;
+pub const MULTIBOOT_INFO_APM_TABLE = 1024;
+pub const __clang_major__ = 8;
+pub const __FLT16_MANT_DIG__ = 11;
+pub const __GNUC__ = 4;
+pub const __UINT32_MAX__ = c_uint(4294967295);
+pub const MULTIBOOT_MEMORY_RESERVED = 2;
+pub const __FLT_DENORM_MIN__ = -nan;
+pub const __DBL_MAX_EXP__ = 1024;
+pub const __INT8_FMTi__ = c"hhi";
+pub const __UINT_LEAST16_MAX__ = 65535;
+pub const __LDBL_HAS_DENORM__ = 1;
+pub const __FLT16_MIN_10_EXP__ = -13;
+pub const __LDBL_HAS_QUIET_NAN__ = 1;
+pub const __UINT_FAST8_MAX__ = 255;
+pub const __DBL_MIN_10_EXP__ = -307;
+pub const __UINT8_FMTu__ = c"hhu";
+pub const __INT_FAST64_MAX__ = c_long(9223372036854775807);
+pub const __SSE3__ = 1;
+pub const __UINT16_FMTu__ = c"hu";
+pub const __ATOMIC_SEQ_CST = 5;
+pub const __SIZE_FMTu__ = c"lu";
+pub const __LDBL_MIN_EXP__ = -16381;
+pub const __UINT_FAST32_FMTu__ = c"u";
+pub const __clang_patchlevel__ = 0;
+pub const __SIZEOF_LONG_LONG__ = 8;
+pub const __BMI2__ = 1;
+pub const MULTIBOOT_INFO_ELF_SHDR = 32;
+pub const __GNUC_STDC_INLINE__ = 1;
+pub const __PCLMUL__ = 1;
+pub const __FXSR__ = 1;
+pub const __UINT8_MAX__ = 255;
+pub const __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 = 1;
+pub const __UINT32_FMTx__ = c"x";
+pub const __UINT16_FMTo__ = c"ho";
+pub const __POPCNT__ = 1;
+pub const __OPENCL_MEMORY_SCOPE_DEVICE = 2;
+pub const MULTIBOOT_VIDEO_MODE = 4;
+pub const __UINT32_FMTu__ = c"u";
+pub const __SIZEOF_POINTER__ = 8;
+pub const __SIZE_MAX__ = c_ulong(18446744073709551615);
+pub const __unix = 1;
+pub const __INT_FAST16_FMTd__ = c"hd";
+pub const unix = 1;
+pub const __UINT_LEAST32_FMTu__ = c"u";
+pub const __FLT_MAX__ = -nan;
+pub const __corei7 = 1;
+pub const __GCC_ATOMIC_WCHAR_T_LOCK_FREE = 2;
+pub const __ATOMIC_CONSUME = 1;
+pub const __unix__ = 1;
+pub const __x86_64__ = 1;
+pub const __LDBL_HAS_INFINITY__ = 1;
+pub const __UINTMAX_FMTx__ = c"lx";
+pub const __UINT64_C_SUFFIX__ = UL;
+pub const __INT_LEAST16_MAX__ = 32767;
+pub const __FLT_MIN_10_EXP__ = -37;
+pub const __UINT32_FMTo__ = c"o";
+pub const __UINTPTR_FMTo__ = c"lo";
+pub const __INT_LEAST16_FMTd__ = c"hd";
+pub const __UINTPTR_FMTx__ = c"lx";
+pub const __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 = 1;
+pub const __INT_LEAST64_FMTd__ = c"ld";
+pub const __INT_LEAST16_TYPE__ = short;
+pub const MULTIBOOT_HEADER_MAGIC = 464367618;
+pub const __ORDER_BIG_ENDIAN__ = 4321;
+pub const __LDBL_MIN_10_EXP__ = -4931;
+pub const __INT_LEAST8_MAX__ = 127;
+pub const __SIZEOF_INT__ = 4;
+pub const __GCC_ATOMIC_POINTER_LOCK_FREE = 2;
+pub const MULTIBOOT_INFO_DRIVE_INFO = 128;
+pub const MULTIBOOT_MEMORY_INFO = 2;
+pub const __amd64 = 1;
+pub const __OBJC_BOOL_IS_BOOL = 0;
+pub const __LDBL_MAX_10_EXP__ = 4932;
+pub const __SIZEOF_INT128__ = 16;
+pub const __UINT_FAST8_FMTx__ = c"hhx";
+pub const __linux = 1;
+pub const __UINT16_FMTx__ = c"hx";
+pub const __UINTPTR_FMTu__ = c"lu";
+pub const __UINT_LEAST16_FMTX__ = c"hX";
+pub const __amd64__ = 1;
+pub const __UINT_FAST32_FMTo__ = c"o";
+pub const __linux__ = 1;
+pub const __clang__ = 1;
+pub const __LP64__ = 1;
+pub const __PTRDIFF_FMTi__ = c"li";
+pub const __SSE4_1__ = 1;
+pub const __LDBL_DIG__ = 18;
+pub const __GCC_ATOMIC_CHAR32_T_LOCK_FREE = 2;
+pub const __XSAVEOPT__ = 1;
+pub const __UINT64_FMTo__ = c"lo";
+pub const __INT_FAST32_FMTd__ = c"d";
+pub const __ATOMIC_ACQ_REL = 4;
+pub const MULTIBOOT_MEMORY_ACPI_RECLAIMABLE = 3;
+pub const __LONG_LONG_MAX__ = c_longlong(9223372036854775807);
+pub const __OPENCL_MEMORY_SCOPE_SUB_GROUP = 4;
+pub const MULTIBOOT_MEMORY_NVS = 4;
+pub const MULTIBOOT_INFO_MEM_MAP = 64;
+pub const __INTMAX_MAX__ = c_long(9223372036854775807);
+pub const __UINT_LEAST32_FMTx__ = c"x";
+pub const __WCHAR_MAX__ = 2147483647;
+pub const __INT64_MAX__ = c_long(9223372036854775807);
+pub const __CLANG_ATOMIC_CHAR32_T_LOCK_FREE = 2;
+pub const __INT_LEAST64_MAX__ = c_long(9223372036854775807);
+pub const __UINTMAX_FMTX__ = c"lX";
+pub const __OPENCL_MEMORY_SCOPE_WORK_ITEM = 0;
+pub const __FLT_HAS_DENORM__ = 1;
+pub const __DECIMAL_DIG__ = __LDBL_DECIMAL_DIG__;
+pub const __INT32_FMTi__ = c"i";
+pub const __DBL_HAS_INFINITY__ = 1;
+pub const __FINITE_MATH_ONLY__ = 0;
+pub const multiboot_header = struct_multiboot_header;
+pub const multiboot_aout_symbol_table = struct_multiboot_aout_symbol_table;
+pub const multiboot_elf_section_header_table = struct_multiboot_elf_section_header_table;
+pub const multiboot_info = struct_multiboot_info;
+pub const multiboot_color = struct_multiboot_color;
+pub const multiboot_mmap_entry = struct_multiboot_mmap_entry;
+pub const multiboot_mod_list = struct_multiboot_mod_list;
+pub const multiboot_apm_info = struct_multiboot_apm_info;