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base: gwdev:d4e6dd4da8456e42ae7028364bc0dafb8ee55ca3
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gwdev:master
gwdev:integrated-bootloader
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compare: gwdev:c9bd659f5c9f1ceee1742d8bdd0a3421c052f002
Branches Tags
gwdev:integrated-bootloader
gwdev:master

6 Commits
d4e6dd4da8 ... c9bd659f5c

Author SHA1 Message Date
Curle
c9bd659f5c Add bootstrap source. 
Made to manage holdover from Syncboot, but is half-finished because of
an issue with the prior mentioned header file.
 2019-07-22 22:34:02 +01:00
Curle
2bfe904014 Add main kernel header. 
Defines all of the structs, functions and variables for the new kernel.

Currently has some issues with GCC.
 2019-07-22 22:33:07 +01:00
Curle
04e70ab274 Commenting improvements 
Even more preparing for UEFI.
 2019-07-22 22:32:35 +01:00
Curle
272d98f42e Shuffle headers 
More preparing for UEFI.
 2019-07-22 22:31:49 +01:00
Curle
87acb5463b Remove Multiboot header in preparation for moving to UEFI 2019-07-22 22:31:16 +01:00
Curle
8df29db4bf Shuffle files in preparation for the shift to UEFI 2019-07-21 19:13:42 +01:00
35 changed files with 1964 additions and 1566 deletions
Show Stats Expand all files Collapse all files

188
arch/i386/boot.s → arch/uefi_x64/boot.s Executable file → Normal file
View File

@ -1,94 +1,94 @@
[BITS 32] ;... somehow.
[GLOBAL start]
start:
mov esp, _sys_stack ; Stack pointer!
jmp stublet ; This has a purpse. I don't know what it is, but there is one.
ALIGN 4 ; 4KB alignment, required by GRUB.
mboot: ; This is all magic, and all of it required for GRUB to see our stuff.
MULTIBOOT_ALIGN equ 1<<0
MULTIBOOT_MEM equ 1<<1
MULTIBOOT_AOUT equ 1<<16
MULTIBOOT_MAGIC equ 0x1BADB002
MULTIBOOT_FLAGS equ MULTIBOOT_ALIGN | MULTIBOOT_MEM | MULTIBOOT_AOUT
MULTIBOOT_CHECKSUM equ -(MULTIBOOT_MAGIC + MULTIBOOT_FLAGS)
EXTERN code, bss, end
dd MULTIBOOT_MAGIC
dd MULTIBOOT_FLAGS
dd MULTIBOOT_CHECKSUM
dd mboot
dd code
dd bss
dd end
dd start
stublet: ; Where the kernel stuff goes.
;=====================================
;===Priority: 32 bit Protected Mode===
;=====================================
cli ; Interrupts be gone!
xor cx, cx ; CX - GP, useful here.
kbempty:
in al, 64h ; Read keyboard status
test al, 02h ; Check if the buffer is full
loopnz kbempty ; Wait until it is
mov al, 0d1h ; Prepare a message
out 64h, al ; And then send it to the keyboard (controller)
kbempty2:
in al, 64h ; Read the status again
test al, 02h ; Check if it's processed our message
loopnz kbempty2 ; And wait until it has
mov al, 0dfh ; Prepare a different message, telling it to enable A20
out 60h, al ; Send the message
mov cx, 14h ; Restore the value of CX
wait_kb: ; Insinuate a 25uS delay to allow the processor to catch up
out 0edh, ax
loop wait_kb
mov eax, cr0 ; Read the control register
or al, 1 ; Set bit 1: protected mode
mov cr0, eax ; Set the control register back
jmp $+2 ; Clear the queue
nop ; (jump straight to kernel)
nop
;==================================
;===32-bit Protected Mode active===
;==================================
; Call the kernel
EXTERN kernel_main
call kernel_main
jmp $
[GLOBAL load_gdt]
[EXTERN gp]
load_gdt:
lgdt [gp] ; Load the new GDT pointer
mov ax, 0x10
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
jmp 0x08:flush
flush:
ret
[GLOBAL idt_load]
[EXTERN idtp]
idt_load:
lidt [idtp]
ret
SECTION .bss
resb 8192
_sys_stack:
[BITS 32] ;... somehow.
[GLOBAL start]
start:
mov esp, _sys_stack ; Stack pointer!
jmp stublet ; This has a purpse. I don't know what it is, but there is one.
ALIGN 4 ; 4KB alignment, required by GRUB.
mboot: ; This is all magic, and all of it required for GRUB to see our stuff.
MULTIBOOT_ALIGN equ 1<<0
MULTIBOOT_MEM equ 1<<1
MULTIBOOT_AOUT equ 1<<16
MULTIBOOT_MAGIC equ 0x1BADB002
MULTIBOOT_FLAGS equ MULTIBOOT_ALIGN | MULTIBOOT_MEM | MULTIBOOT_AOUT
MULTIBOOT_CHECKSUM equ -(MULTIBOOT_MAGIC + MULTIBOOT_FLAGS)
EXTERN code, bss, end
dd MULTIBOOT_MAGIC
dd MULTIBOOT_FLAGS
dd MULTIBOOT_CHECKSUM
dd mboot
dd code
dd bss
dd end
dd start
stublet: ; Where the kernel stuff goes.
;=====================================
;===Priority: 32 bit Protected Mode===
;=====================================
cli ; Interrupts be gone!
xor cx, cx ; CX - GP, useful here.
kbempty:
in al, 64h ; Read keyboard status
test al, 02h ; Check if the buffer is full
loopnz kbempty ; Wait until it is
mov al, 0d1h ; Prepare a message
out 64h, al ; And then send it to the keyboard (controller)
kbempty2:
in al, 64h ; Read the status again
test al, 02h ; Check if it's processed our message
loopnz kbempty2 ; And wait until it has
mov al, 0dfh ; Prepare a different message, telling it to enable A20
out 60h, al ; Send the message
mov cx, 14h ; Restore the value of CX
wait_kb: ; Insinuate a 25uS delay to allow the processor to catch up
out 0edh, ax
loop wait_kb
mov eax, cr0 ; Read the control register
or al, 1 ; Set bit 1: protected mode
mov cr0, eax ; Set the control register back
jmp $+2 ; Clear the queue
nop ; (jump straight to kernel)
nop
;==================================
;===32-bit Protected Mode active===
;==================================
; Call the kernel
EXTERN kernel_main
call kernel_main
jmp $
[GLOBAL load_gdt]
[EXTERN gp]
load_gdt:
lgdt [gp] ; Load the new GDT pointer
mov ax, 0x10
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
jmp 0x08:flush
flush:
ret
[GLOBAL idt_load]
[EXTERN idtp]
idt_load:
lidt [idtp]
ret
SECTION .bss
resb 8192
_sys_stack:

50
arch/i386/linker.ld → arch/uefi_x64/linker.ld Executable file → Normal file
View File

@ -1,25 +1,25 @@
OUTPUT_FORMAT("elf32-i386")
ENTRY(start)
phys = 0x00100000;
SECTIONS
{
.text phys : AT(phys) {
code = .;
*(.text)
*(.rodata)
. = ALIGN(4096);
}
.data : AT(phys + (data - code))
{
data = .;
*(.data)
. = ALIGN(4096);
}
.bss : AT(phys + (bss - code))
{
bss = .;
*(.bss)
. = ALIGN(4096);
}
end = .;
}
OUTPUT_FORMAT("elf32-i386")
ENTRY(start)
phys = 0x00100000;
SECTIONS
{
.text phys : AT(phys) {
code = .;
*(.text)
*(.rodata)
. = ALIGN(4096);
}
.data : AT(phys + (data - code))
{
data = .;
*(.data)
. = ALIGN(4096);
}
.bss : AT(phys + (bss - code))
{
bss = .;
*(.bss)
. = ALIGN(4096);
}
end = .;
}

18
arch/i386/make.config → arch/uefi_x64/make.config Executable file → Normal file
View File

@ -1,9 +1,9 @@
KERNEL_ARCH_CFLAGS=
KERNEL_ARCH_CPPFLAGS=
KERNEL_ARCH_LDFLAGS=
KERNEL_ARCH_LIBS=
KERNEL_ARCH_OBJS= \
$(ARCHDIR)/boot.o \
$(ARCHDIR)/sys_clock.o \
$(ARCHDIR)/tty.o
KERNEL_ARCH_CFLAGS=
KERNEL_ARCH_CPPFLAGS=
KERNEL_ARCH_LDFLAGS=
KERNEL_ARCH_LIBS=
KERNEL_ARCH_OBJS= \
$(ARCHDIR)/boot.o \
$(ARCHDIR)/sys_clock.o \
$(ARCHDIR)/tty.o

68
arch/i386/sys_clock.c → arch/uefi_x64/sys_clock.c Executable file → Normal file
View File

@ -1,35 +1,35 @@
/************************
*** Team Kitty, 2019 ***
*** Sync ***
***********************/
/* This file provides an interface to
* the hardware timer / RTC. Not much
* more to be said about it. */
#include <kernel/utils.h>
#include <kernel.h>
#include <kernel/serial.h>
#include <kernel/descriptor_tables.h>
size_t timer_ticks = 0;
size_t flag = 0;
void timer_handler(struct int_frame* r) {
gdb_end();
timer_ticks++;
if(timer_ticks % 18 == 0) {
if(++flag % 2 == 0) {
serial_print(0x3F8, "Tick.");
} else {
serial_print(0x3F8, "Tock.");
}
}
if(timer_ticks > 18)
timer_ticks = 0;
}
void timer_install() {
irq_install_handler(0, &timer_handler);
/************************
*** Team Kitty, 2019 ***
*** Sync ***
***********************/
/* This file provides an interface to
* the hardware timer / RTC. Not much
* more to be said about it. */
#include <kernel/utils.h>
#include <kernel.h>
#include <kernel/serial.h>
#include <kernel/descriptor_tables.h>
size_t timer_ticks = 0;
size_t flag = 0;
void timer_handler(struct int_frame* r) {
gdb_end();
timer_ticks++;
if(timer_ticks % 18 == 0) {
if(++flag % 2 == 0) {
serial_print(0x3F8, "Tick.");
} else {
serial_print(0x3F8, "Tock.");
}
}
if(timer_ticks > 18)
timer_ticks = 0;
}
void timer_install() {
irq_install_handler(0, &timer_handler);
}

0
arch/i386/tty.c → arch/uefi_x64/tty.c
View File

909
include/kernel.h
View File

@ -1,12 +1,911 @@
/************************
*** Team Kitty, 2019 ***
*** ProjectRED ***
*** Sync ***
***********************/
#include <stdint.h>
#include <stddef.h>
#include <kernel/tty.h>
/* ==================== Kernel Header ==================== */
/* This file contains most of the shared code for the kernel and
* the classes it interacts with.
*
* Most of this file is constants and struct definitions. */
void panic(char*);
#pragma once
#define SYNC_MAJOR_VERSION 1
#define SYNC_MINOR_VERSION 0
/* ==================== Standard Headers ==================== */
#include <stddef.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdbool.h>
#include <float.h>
#include <efibind.h>
#include <efitypes.h>
#include <efierr.h>
/* ==================== Custom Headers ==================== */
//#include "AVX.h"
/* ==================== EFI structs and constants ==================== */
/* ========= Graphics ========== */
typedef struct {
uint32_t RedMask;
uint32_t GreenMask;
uint32_t BlueMask;
uint32_t ReservedMask;
} EFI_PIXEL_BITMASK;
typedef enum {
PixelRedGreenBlueReserved8BitPerColor,
PixelBlueRedGreenReserved8BitPerColor,
PixelBitMask,
PixelBitOnly,
PixelFormatMax
} EFI_GRAPHICS_PIXEL_FORMAT;
typedef struct {
uint32_t Version;
uint32_t HorizontalResolution;
uint32_t VerticalResolution;
EFI_GRAPHICS_PIXEL_FORMAT PixelFormat;
EFI_PIXEL_BITMASK PixelInformation;
uint32_t PixelsPerScanline;
} EFI_GRAPHICS_OUTPUT_MODE_INFORMATION;
typedef struct {
uint32_t MaxMode;
uint32_t Mode;
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION* Info;
size_t SizeOfInfo;
EFI_PHYSICAL_ADDRESS FrameBufferBase;
size_t FrameBufferSize;
} EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE;
/* ========== Time ========== */
typedef struct {
uint32_t Resolution;
uint32_t Accuracy;
BOOLEAN SetsToZero;
} EFI_TIME_CAPABILITIES;
typedef EFI_STATUS (EFIAPI* EFI_GET_TIME) (
OUT EFI_TIME* Time,
OUT EFI_TIME_CAPABILITIES* Capabilities OPTIONAL
);
typedef EFI_STATUS (EFIAPI* EFI_SET_TIME) (
IN EFI_TIME* Time
);
typedef EFI_STATUS (EFIAPI* EFI_GET_WAKEUP_TIME) (
OUT BOOLEAN* Enabled,
OUT BOOLEAN* Pending,
OUT EFI_TIME* Time
);
typedef EFI_STATUS (EFIAPI* EFI_SET_WAKEUP_TIME) (
IN BOOLEAN Enable,
IN EFI_TIME* Time OPTIONAL
);
/* ========== Variables ========== */
#define EFI_GLOBAL_VARIABLE \
{ 0x8BE4DF61, 0x93CA, 0x11d2, {0xAA, 0x0D, 0x00, 0xE0, 0x98, 0x03, 0x2B, 0x8C} }
#define EFI_VARIABLE_NON_VOLATILE 0x00000001
#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002
#define EFI_VARIABLE_RUNTIME_ACCESS 0x00000004
#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x00000008
#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x00000010
#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x00000020
#define EFI_VARIABLE_APPEND_WRITE 0x00000040
typedef EFI_STATUS (EFIAPI* EFI_GET_VARIABLE) (
IN CHAR16* VariableName,
IN EFI_GUID* VendorGuid,
OUT uint32_t* Attributes OPTIONAL,
IN OUT size_t* DataSize,
OUT void* Data
);
typedef EFI_STATUS (EFIAPI* EFI_GET_NEXT_VARIABLE_NAME) (
IN OUT size_t* VariableNameSize,
IN OUT CHAR16* VariableName,
IN OUT EFI_GUID* VendorGuid
);
typedef EFI_STATUS (EFIAPI* EFI_SET_VARIABLE) (
IN CHAR16* VariableName,
IN EFI_GUID* VendorGuid,
IN uint32_t Attributes,
IN size_t DataSize,
IN void* Data
);
/* ========== Memory ========== */
typedef EFI_STATUS (EFIAPI* EFI_SET_VIRTUAL_ADDRESS_MAP) (
IN size_t MemoryMapSize,
IN size_t DescriptorSize,
IN uint32_t DescriptorVersion,
IN EFI_MEMORY_DESCRIPTOR* VirtualMap
);
#define EFI_OPTIONAL_PTR 0x00000001
#define EFI_INTERNAL_FNC 0x00000002
#define EFI_INTERNAL_PTR 0x00000004
typedef EFI_STATUS (EFIAPI* EFI_CONVERT_POINTER) (
IN size_t DebugDeposition,
IN OUT void* *Address
);
/* ========== Reset ========== */
typedef enum {
EfiResetCold,
EfiResetWarm,
EfiResetShutdown
} EFI_RESET_TYPE;
typedef EFI_STATUS (EFIAPI* EFI_RESET_SYSTEM) (
IN EFI_RESET_TYPE ResetType,
IN EFI_STATUS ResetStatus,
IN size_t DataSize,
IN CHAR16* ResetData OPTIONAL
);
/* ========== Other ========== */
typedef EFI_STATUS(EFIAPI* EFI_GET_NEXT_HIGH_MONO_COUNT) (
OUT uint32_t* HighCount
);
/* ===== Capsule ===== */
typedef struct {
EFI_GUID CapsuleGuid;
uint32_t HeaderSize;
uint32_t Flags;
uint32_t CapsuleImageSize;
} EFI_CAPSULE_HEADER;
#define CAPSULE_FLAGS_PERSIST_ACROSS_RESET 0x00010000
#define CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE 0x00020000
#define CAPSULE_FLAGS_INITIATE_RESET 0x00040000
typedef EFI_STATUS (EFIAPI* EFI_UPDATE_CAPSULE) (
IN EFI_CAPSULE_HEADER* *CapsuleHeaderArray,
IN size_t CapsuleCount,
IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL
);
typedef EFI_STATUS (EFIAPI* EFI_QUERY_CAPSULE_CAPABILITIES) (
IN EFI_CAPSULE_HEADER* *CapsuleHeaderArray,
IN size_t CapsuleCount,
OUT size_t* MaximumCapsuleSize,
OUT EFI_RESET_TYPE* ResetType
);
typedef EFI_STATUS (EFIAPI* EFI_QUERY_VARIABLE_INFO) (
IN uint32_t Attributes,
OUT size_t* MaximumVariableStorage,
OUT size_t* RemainingVariableStorageSize,
OUT size_t* MaximumVariableSize
);
/* ==================== EFI Runtime Services ==================== */
typedef struct {
EFI_TABLE_HEADER Header;
/* Time */
EFI_GET_TIME GetTime;
EFI_SET_TIME SetTime;
EFI_GET_WAKEUP_TIME GetWakeupTime;
EFI_SET_WAKEUP_TIME SetWakeupTime;
/* Virtual Memory */
EFI_SET_VIRTUAL_ADDRESS_MAP SetVirtualAddressMap;
EFI_CONVERT_POINTER ConvertPointer;
/* Variable Services */
EFI_GET_VARIABLE GetVariable;
EFI_GET_NEXT_VARIABLE_NAME GetNextVariableName;
EFI_SET_VARIABLE SetVariable;
/* Other */
EFI_GET_NEXT_HIGH_MONO_COUNT GetNextHighMonoCount;
EFI_RESET_SYSTEM ResetSystem;
/* Capsule Services */
EFI_UPDATE_CAPSULE UpdateCapsule;
EFI_QUERY_CAPSULE_CAPABILITIES QueryCapsuleCapabilities;
EFI_QUERY_VARIABLE_INFO QueryVariableInfo;
} EFI_RUNTIME_SERVICES;
/* ==================== EFI File Info ==================== */
typedef struct {
size_t Size;
size_t FileSize;
size_t PhysicalSize;
EFI_TIME CreateTime;
EFI_TIME LastAccessTime;
EFI_TIME ModificationTime;
size_t Attribute;
CHAR16 FileName[1];
} EFI_FILE_INFO;
/* ==================== EFI System Configuration Tables ==================== */
#define MPS_TABLE_GUID \
{ 0xeb9d2d2f, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d} }
#define ACPI_10_TABLE_GUID \
{ 0xeb9d2d30, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d} }
#define ACPI_20_TABLE_GUID \
{ 0x8868e871, 0xe4f1, 0x11d3, {0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81} }
#define SMBIOS_TABLE_GUID \
{ 0xeb9d2d31, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d} }
#define SMBIOS3_TABLE_GUID \
{ 0xf2fd1544, 0x9794, 0x4a2c, {0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94} }
#define SAL_SYSTEM_TABLE_GUID \
{ 0xeb9d2d32, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d} }
static const EFI_GUID MpsTableGuid = MPS_TABLE_GUID;
static const EFI_GUID Acpi10TableGuid = ACPI_10_TABLE_GUID;
static const EFI_GUID Acpi20TableGuid = ACPI_20_TABLE_GUID;
static const EFI_GUID SmBiosTableGuid = SMBIOS_TABLE_GUID;
static const EFI_GUID SmBios3TableGuid = SMBIOS3_TABLE_GUID;
static const EFI_GUID SalSystemTableGuid = SAL_SYSTEM_TABLE_GUID;
typedef struct _EFI_CONFIGURATION_TABLE {
EFI_GUID VendorGuid;
void* VendorTable;
} EFI_CONFIGURATION_TABLE;
/* ============================================================= */
/* = Syncboot Structures = */
/* ============================================================= */
typedef struct {
EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE* GPUs;
size_t FBCount;
} GPU_INFO;
typedef struct {
uint32_t UEFI_Version;
uint32_t SYNCBOOT_Major;
uint32_t SYNCBOOT_Minor;
uint32_t MemoryMapDescriptorVersion;
size_t MemoryMapDescriptorSize;
EFI_MEMORY_DESCRIPTOR* MemoryMap;
size_t MemoryMap_Size;
EFI_PHYSICAL_ADDRESS KernelBase;
size_t KernelPages;
CHAR16* ESPRootPath;
size_t ESPRootPathSize;
CHAR16* KernelPath;
size_t KernelPathSize;
CHAR16* KernelOptions;
size_t KernelOptionsSize;
EFI_RUNTIME_SERVICES* RTServices;
GPU_INFO* GPU_Info;
EFI_FILE_INFO* KernelFileMetadata;
EFI_CONFIGURATION_TABLE* ConfigurationTables;
size_t NumConfigurationTables;
} FILELOADER_PARAMS;
/* ============================================================= */
/* = Sync Structures = */
/* ============================================================= */
typedef struct {
uint32_t MemoryMapDescriptorVersion;
size_t MemoryMapDescriptorSize;
size_t MemoryMapSize;
EFI_MEMORY_DESCRIPTOR* MemoryMap;
uint32_t Pad;
} MEMORY_INFO;
typedef struct {
EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE defaultGPU;
uint32_t charHeight;
uint32_t charWidth; // Bit width
uint32_t charFGColor; // ForeGround Color
uint32_t charHLColor; // HighLight Color
uint32_t charBGColor; // BackGround Color
uint32_t screenMinX; // Far left side of the screen
uint32_t screenMinY; // Top of the screen
uint32_t ScreenScale;
uint32_t cursorPos;
uint32_t scrollMode; // Move screen up, or wraparound
} PRINT_INFO;
/* ==================== GDT ==================== */
typedef struct __attribute__((packed)) {
uint16_t LowLimit;
uint16_t LowBase;
uint8_t MiddleBase;
uint8_t Access;
uint8_t Granularity;
uint8_t HighBase;
} GDT_ENTRY;
typedef struct __attribute__((packed)) {
uint16_t Limit;
size_t BaseAddress;
} DESCRIPTOR_TABLE_POINTER;
GDT_ENTRY gdt[3]; //3-entry gdt
DESCRIPTOR_TABLE_POINTER gtdp;
/* ==================== IDT ==================== */
typedef struct __attribute__((packed)) {
uint16_t LowBase;
uint16_t Segment;
uint8_t IST;
uint8_t SegmentType;
uint16_t MiddleBase;
uint32_t HighBase;
uint32_t Reserved;
} IDT_GATE;
typedef struct __attribute__((packed)) {
uint16_t LowBase;
uint16_t Selector;
uint8_t IST;
uint8_t Flags;
uint16_t HighBase;
} IDT_ENTRY;
IDT_ENTRY idt[256];
DESCRIPTOR_TABLE_POINTER idtp; // IDT Pointer
/* ==================== TSS ==================== */
/* Intel Architecture Manual Vol. 3A, Fig. 7-4 (Format of TSS and LDT Descriptors in 64-bit Mode)
*
* Segment Limit is a 20-bit value - the lower 16 bits are stored at SegmentLimitLow and the higher 4 bits at SegmentLimitHigh;
* Base Address is a 64-bit value - The lower 24 bits are stored at Low and Middle1, the upper 46 bits at Middle2 and High.
* SegmentType stores the following:
*
* =========================
* | 0 - 3 | 4 | 5 6 | 7 |
* | SEGType | S | DPL | P |
* =========================
*
* SegmentLimitHigh stores the following:
*
* ==========================================
* | 0 - 3 | 4 | 5 | 6 | 7 |
* | SegmentLimit | Avail | L | D/B | Gran |
* ==========================================
*
*/
typedef struct __attribute__((packed)) {
uint16_t SegmentLimitLow;
uint16_t BaseLow;
uint8_t BaseMiddle1;
uint8_t SegmentType;
uint8_t SegmentLimitHigh;
uint8_t BaseMiddle2;
uint32_t BaseHigh;
uint32_t Reserved;
} TSS_ENTRY;
typedef struct __attribute__((packed)) {
uint32_t SegmentSelector;
uint16_t SegmentType;
uint16_t SegmentLow;
uint32_t SegmentHigh;
uint32_t Reserved;
} CALL_GATE_ENTRY;
/* Intel Architecture Manual Vol. 3A, Fig. 7-11 (64-Bit TSS Format)
*/
typedef struct __attribute__((packed)) {
uint32_t Reserved0;
size_t RSP0;
size_t RSP1;
size_t RSP2;
size_t Reserved12;
size_t IST1;
size_t IST2;
size_t IST3;
size_t IST4;
size_t IST5;
size_t IST6;
size_t IST7;
size_t Reserved34;
uint16_t Reserved5;
uint16_t IOMap;
} TSS_64;
/* ==================== ACPI ==================== */
/*
* ACPI Specification 6.2A, section 5.2.5 (Root System Description Pointer (RSDP))
*/
typedef struct __attribute__((packed)) {
char Signature[8]; // "RSD PTR "
uint8_t Checksum;
char OEMID[6];
uint8_t Revision;
uint32_t RSDT; // 32 bit
} RSDP_10;
typedef struct __attribute__((packed)) {
RSDP_10 RSDP_10_Section;
uint32_t Length;
size_t XSDT; // = 64 bit RSDT
uint8_t ChecksumExtended;
uint8_t Reserved[3];
} RSDP_20;
typedef struct __attribute__((packed)) {
char Signature[4];
uint32_t Length;
uint8_t Revision;
uint8_t Checksum;
char OEMID[6];
char OEMTableID[8];
uint32_t OEMRevision;
uint32_t CreatorID;
uint32_t CreatorRevision;
} SDTHeader; // System Descriptor Table
typedef struct __attribute__((packed)) {
SDTHeader SDTHeader;
size_t Entry[1];
} XSDT;
/* ==================== Global Variables ==================== */
MEMORY_INFO Memory_Info = {0};
PRINT_INFO Print_Info = {0};
uint8_t Image[96] = {0};
char BrandStr[48] = {0};
char ManufacturerStr[13] = {0};
/* ==================== Interrupts ==================== */
typedef struct __attribute__((packed)) {
size_t rip;
size_t cs;
size_t rflags;
size_t rsp;
size_t ss;
} INTERRUPT_FRAME;
typedef struct __attribute__((packed)) {
size_t ErrorCode;
size_t rip;
size_t cs;
size_t rflags;
size_t rsp;
size_t ss;
} EXCEPTION_FRAME;
typedef struct __attribute__((aligned(64), packed)) {
// Legacy FXSAVE header
UINT16 fcw;
UINT16 fsw;
UINT8 ftw;
UINT8 Reserved1;
UINT16 fop;
UINT64 fip;
UINT64 fdp;
UINT32 mxcsr;
UINT32 mxcsr_mask;
// Legacy x87/MMX registers
UINT64 st_mm_0[2];
UINT64 st_mm_1[2];
UINT64 st_mm_2[2];
UINT64 st_mm_3[2];
UINT64 st_mm_4[2];
UINT64 st_mm_5[2];
UINT64 st_mm_6[2];
UINT64 st_mm_7[2];
// SSE registers
UINT64 xmm0[2];
UINT64 xmm1[2];
UINT64 xmm2[2];
UINT64 xmm3[2];
UINT64 xmm4[2];
UINT64 xmm5[2];
UINT64 xmm6[2];
UINT64 xmm7[2];
UINT64 xmm8[2];
UINT64 xmm9[2];
UINT64 xmm10[2];
UINT64 xmm11[2];
UINT64 xmm12[2];
UINT64 xmm13[2];
UINT64 xmm14[2];
UINT64 xmm15[2];
UINT8 Reserved2[48];
UINT8 pad[48];
UINT64 xstate_bv;
UINT64 xcomp_bv;
UINT64 Reserved3[6];
UINT8 extended_region[1];
} XSAVE_AREA;
static void* irq_routines[16] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
static const char* exception_messages[] = {
"Division by Zero",
"Debug",
"Non Maskable Interrupt",
"Breakpoint",
"Into Detected Overflow",
"Out of Bounds",
"Invalid Opcode",
"No Coprocessor",
"Double Fault",
"Coprocessor Segment Overrun",
"Bad TSS",
"Segment Not Present",
"Stack Fault",
"General Protection Fault",
"Page Fault",
"Unknown Interrupt",
"Coprocessor Fault",
"Alignment Check",
"Machine Check",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved"
};
/* ============================================================= */
/* = Sync Functions = */
/* ============================================================= */
/* System Initialization */
void PrepareSystem(FILELOADER_PARAMS* FLOP);
/* System Utilities */
size_t ClockTick(void);
void Halt(void);
void PrepareAVX(void);
void PrepareMaskableInterrupts(void);
void PreparePowerManagement(void);
/* Hypervisor / Scheduler */
uint8_t HypervisorCheck(void);
uint8_t ReadPerformance(size_t* PerformanceDest);
size_t ReadCPUFrequency(size_t* PerformanceDest, uint8_t AvgOrDirect);
/* Read/Write Port (eg. Serial) */
uint32_t ReadPort(uint16_t Port, int Length);
uint32_t WritePort(uint16_t Port, uint32_t Data, int Length);
/* ==================== Registers ==================== */
size_t ReadModelSpecificRegister(size_t MSR);
size_t WriteModelSpecificRegister(size_t MSR, size_t Data);
uint32_t ReadVexMXCSR(void);
uint32_t WriteVexMXCSR(uint32_t Data);
uint32_t ReadMXCSR(void);
uint32_t WriteMXCSR(uint32_t Data);
size_t ReadControlRegister(int CRX);
size_t WriteControlRegister(int CRX, size_t Data);
size_t ReadExtendedControlRegister(size_t XCRX);
size_t WriteExtendedControlRegister(size_t XCRX, size_t Data);
// XCS = Extended Code Segment
size_t ReadXCS(void);
/* ==================== Descriptor Tables ==================== */
DESCRIPTOR_TABLE_POINTER FetchGDT(void);
void SetGDT(DESCRIPTOR_TABLE_POINTER GDTData);
DESCRIPTOR_TABLE_POINTER FetchIDT(void);
void SetIDT(DESCRIPTOR_TABLE_POINTER IDTData);
DESCRIPTOR_TABLE_POINTER FetchLDT(void);
void SetLDT(DESCRIPTOR_TABLE_POINTER LDTData);
DESCRIPTOR_TABLE_POINTER FetchTSR(void);
void SetTSR(DESCRIPTOR_TABLE_POINTER TSRData);
void InstallGDT(void);
void InstallIDT(void);
void InstallPaging(void);
/* ==================== Branding ==================== */
char* FetchBrandStr(uint32_t* Str);
char* FetchManufacturer(char* ID);
void ScanCPUFeatures(size_t RAX, size_t RCX);
/* ==================== Interrupts ==================== */
void IRQ_Common(INTERRUPT_FRAME* Frame);
void ISR_Common(INTERRUPT_FRAME* Frame);
void ISR_Error_Common(EXCEPTION_FRAME* Frame);
void ISR0Handler(INTERRUPT_FRAME* Frame); // Divide-By-Zero
void ISR1Handler(INTERRUPT_FRAME* Frame); // Debug
void ISR2Handler(INTERRUPT_FRAME* Frame); // Non-Maskable Interrupt
void ISR3Handler(INTERRUPT_FRAME* Frame); // Breakpoint
void ISR4Handler(INTERRUPT_FRAME* Frame); // Overflow
void ISR5Handler(INTERRUPT_FRAME* Frame); // Out-of-Bounds
void ISR6Handler(INTERRUPT_FRAME* Frame); // Invalid Opcode
void ISR7Handler(INTERRUPT_FRAME* Frame); // No Coprocessor
void ISR8Handler(EXCEPTION_FRAME* Frame); // Double Fault
void ISR9Handler(INTERRUPT_FRAME* Frame); // Coprocessor Overrun
void ISR10Handler(EXCEPTION_FRAME* Frame); // Invalid TSS
void ISR11Handler(EXCEPTION_FRAME* Frame); // Segment Not Present
void ISR12Handler(EXCEPTION_FRAME* Frame); // Stack Segment Fault
void ISR13Handler(EXCEPTION_FRAME* Frame); // General Protection Fault
void ISR14Handler(EXCEPTION_FRAME* Frame); // Page Fault
void ISR15Handler(INTERRUPT_FRAME* Frame); // Unknown Interrupt
void ISR16Handler(INTERRUPT_FRAME* Frame); // Math Error / Coprocessor Fault
void ISR17Handler(EXCEPTION_FRAME* Frame); // Alignment Error
void ISR18Handler(INTERRUPT_FRAME* Frame); // Machine Check
void ISR19Handler(INTERRUPT_FRAME* Frame); // SSE Math Error
void ISR19Handler(INTERRUPT_FRAME* Frame); // Virtualization Exception
void ISR20Handler(EXCEPTION_FRAME* Frame); // Security Fault
/* ==================== Interrupt Support ==================== */
void DumpRegisters_ISR(INTERRUPT_FRAME* Frame);
void DumpRegisters_Error(EXCEPTION_FRAME* Frame);
void DumpRegisters_AVX(XSAVE_AREA* Area);
void DumpControlRegisters(void);
void DumpFileloaderParams(FILELOADER_PARAMS* FLOP);
void DumpSegmentRegisters(void);
void irq_install_handler(int irq, void (*handler)(INTERRUPT_FRAME* r));
void irq_uninstall_handler(int);
void irq_install();
void irq_remap();
void timer_install();
/* ==================== Memory ==================== */
uint8_t VerifyZero(size_t Length, size_t Start);
size_t FetchMemoryLimit(void);
size_t FetchVisibleMemory(void);
size_t FetchAvailableMemory(void);
size_t FetchAvailablePMemory(void);
size_t FetchInstalledMemory(void);
void PrintMemoryMap();
EFI_MEMORY_DESCRIPTOR* SetIdentityMap(EFI_RUNTIME_SERVICES* RT);
void InstallMemoryMap(void);
void ReclaimEfiBootServicesMemory(void);
void ReclaimEfiLoaderCodeMemory(void);
void MergeFragmentedMemory(void);
EFI_PHYSICAL_ADDRESS PurgeAllMemory(void);
EFI_PHYSICAL_ADDRESS AllocatePagetable(size_t PagetableSize);
/* Physical Addresses */
__attribute__((malloc)) void* kalloc(size_t Length);
__attribute__((malloc)) void* kalloc_16(size_t Length);
__attribute__((malloc)) void* kalloc_32(size_t Length);
__attribute__((malloc)) void* kalloc_64(size_t Length);
__attribute__((malloc)) void* kalloc_pages(size_t Pages);
EFI_PHYSICAL_ADDRESS FindFreeAddress(size_t Pages, EFI_PHYSICAL_ADDRESS Start);
EFI_PHYSICAL_ADDRESS FindFreeAddress_ByPage(size_t Pages, EFI_PHYSICAL_ADDRESS Start);
/* The _ByXBytes functions here try to align the allocated space to the specified size. */
EFI_PHYSICAL_ADDRESS AllocateFreeAddress_ByPage(size_t Pages, EFI_PHYSICAL_ADDRESS Start);
EFI_PHYSICAL_ADDRESS AllocateFreeAddress_By16Bytes(size_t Bytes, EFI_PHYSICAL_ADDRESS Start);
EFI_PHYSICAL_ADDRESS AllocateFreeAddress_By32Bytes(size_t Bytes, EFI_PHYSICAL_ADDRESS Start);
EFI_PHYSICAL_ADDRESS AllocateFreeAddress_By64Bytes(size_t Bytes, EFI_PHYSICAL_ADDRESS Start);
/* Virtual Addresses */
__attribute__((malloc)) void* valloc(size_t Length);
__attribute__((malloc)) void* valloc_16(size_t Length);
__attribute__((malloc)) void* valloc_32(size_t Length);
__attribute__((malloc)) void* valloc_64(size_t Length);
__attribute__((malloc)) void* valloc_pages(size_t Pages);
EFI_VIRTUAL_ADDRESS FindVirtualAddress(size_t Pages, EFI_VIRTUAL_ADDRESS Start);
EFI_VIRTUAL_ADDRESS FindVirtualAddress_ByPage(size_t Pages, EFI_VIRTUAL_ADDRESS Start);
EFI_VIRTUAL_ADDRESS AllocateVirtualAddress_ByPage(size_t Pages, EFI_VIRTUAL_ADDRESS Start);
EFI_VIRTUAL_ADDRESS AllocateVirtualAddress_By16Bytes(size_t Pages, EFI_VIRTUAL_ADDRESS Start);
EFI_VIRTUAL_ADDRESS AllocateVirtualAddress_By32Bytes(size_t Pages, EFI_VIRTUAL_ADDRESS Start);
EFI_VIRTUAL_ADDRESS AllocateVirtualAddress_By64Bytes(size_t Pages, EFI_VIRTUAL_ADDRESS Start);
/* ==================== Graphics ==================== */
void ClearScreen(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU);
void FillScreen(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU, uint32_t Color);
void ResetDefaultScreenColor(void);
void ResetDefaultScreen(void);
void DrawPixel(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
uint32_t x,
uint32_t y,
uint32_t Color);
void BitmapSetup(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
const uint8_t* Bitmap,
uint32_t Height,
uint32_t BitWidth,
uint32_t FontColor,
uint32_t HighlightColor,
uint32_t x,
uint32_t y,
uint32_t Scale);
void BitmapRender(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
const uint8_t* BitMap,
uint32_t Height,
uint32_t BitWidth,
uint32_t FontColor,
uint32_t HighlightColor,
uint32_t x,
uint32_t y,
uint32_t Scale,
uint32_t Character);
void BitmapBitswap(const uint8_t* BitMap,
uint32_t Height,
uint32_t BitWidth,
uint8_t* Out);
void BitmapReverse(const uint8_t* BitMap,
uint32_t Height,
uint32_t BitWidth,
uint8_t* Out);
void BitmapMirror(const uint8_t* BitMap,
uint32_t Height,
uint32_t BitWidth,
uint8_t* Out);
/* ========== Text ========== */
void SetupPrinting(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU);
void WriteChar(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
int Char,
uint32_t Height,
uint32_t Width,
uint32_t FontColor,
uint32_t HighlightColor);
void WriteCharPos(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
int Char,
uint32_t Height,
uint32_t Width,
uint32_t FontColor,
uint32_t HighlightColor,
uint32_t x,
uint32_t y);
void WriteScaledChar(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
int Char,
uint32_t Height,
uint32_t Width,
uint32_t FontColor,
uint32_t HighlightColor,
uint32_t x,
uint32_t y,
uint32_t Scale);
void WriteScaledString(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
const char* string,
uint32_t Height,
uint32_t Width,
uint32_t FontColor,
uint32_t HighlightColor,
uint32_t x,
uint32_t y,
uint32_t Scale);
void WriteScaledFormatString(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
uint32_t Height,
uint32_t Width,
uint32_t FontColor,
uint32_t HighlightColor,
uint32_t x,
uint32_t y,
uint32_t Scale,
const char* String,
...);
void RenderText(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,
int Char,
uint32_t Height,
uint32_t Width,
uint32_t FontColor,
uint32_t HighlightColor,
uint32_t x,
uint32_t y,
uint32_t Scale,
uint32_t Index);
/* ==================== Printf ==================== */
int snprintf(char* String, size_t Length, const char* Format, ...);
int vsnprintf(char* String, size_t Length, const char* Format, va_list AP);
int vsnrprintf(char* String, size_t Length, int Radix, const char* Format, va_list AP);
int sprintf(char* Buffer, const char* Format, ...);
int vsprintf(char* Buffer, const char* Format, va_list AP);
int printf(const char* Format, ...);
int vprintf(const char* Format, va_list AP);
int kvprintf(const char* Format, void (*func)(int, void*), void* Args, int Radix, va_list AP);
void PrintUTF16AsUTF8(CHAR16* String, size_t Length);
char* UTF16ToUTF8(CHAR16* String, size_t Length);
void gdb_end();

161
include/kernel/descriptor_tables.h
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@ -1,161 +0,0 @@
#pragma once
#include <stddef.h>
#include <stdint.h>
void gdt_set_gate(int, uint32_t, uint32_t, uint8_t, uint8_t);
void gdt_install();
struct gdt_item {
uint16_t low_limit;
uint16_t low_base;
uint8_t middle_base;
uint8_t access;
uint8_t granular;
uint8_t high_base;
} __attribute__((packed)); //Prevent compiler optimisation by packing
struct gdt_ptr {
uint16_t limit;
unsigned int base;
} __attribute__((packed));
struct gdt_item gdt[3]; //3-entry gdt
struct gdt_ptr gp;
extern void load_gdt();
void idt_set_gate(unsigned char, unsigned long, unsigned short, unsigned char);
void idt_install();
struct idt_entry {
unsigned short base_low;
unsigned short selector;
unsigned char always0;
unsigned char flags;
unsigned short base_high;
} __attribute__((packed));
struct idt_ptr {
unsigned short limit;
unsigned int base;
}__attribute__((packed));
struct idt_entry idt[256]; //interrupt table of 256 entries
struct idt_ptr idtp; //pointer to idt table
struct int_frame {
void (*eip) (void);
uint16_t cs, :16;
uint32_t eflags;
void* esp;
uint16_t ss, :16;
} __attribute__((packed));
void isr_common(struct int_frame*, size_t);
void isr_error_common(struct int_frame*, size_t, size_t);
void irq_common(struct int_frame*, size_t);
extern void idt_load();
//These are all reserved by Intel, and need to be here.
extern void isr0();
extern void isr1();
extern void isr2();
extern void isr3();
extern void isr4();
extern void isr5();
extern void isr6();
extern void isr7();
extern void isr8();
extern void isr9();
extern void isr10();
extern void isr11();
extern void isr12();
extern void isr13();
extern void isr14();
extern void isr15();
extern void isr16();
extern void isr17();
extern void isr18();
extern void isr19();
extern void isr20();
extern void isr21();
extern void isr22();
extern void isr23();
extern void isr24();
extern void isr25();
extern void isr26();
extern void isr27();
extern void isr28();
extern void isr29();
extern void isr30();
extern void isr31();
extern void irq0();
extern void irq1();
extern void irq2();
extern void irq3();
extern void irq4();
extern void irq5();
extern void irq6();
extern void irq7();
extern void irq8();
extern void irq9();
extern void irq10();
extern void irq11();
extern void irq12();
extern void irq13();
extern void irq14();
extern void irq15();
static void* irq_routines[16] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
void irq_install_handler(int irq, void (*handler)(struct int_frame* r));
void irq_uninstall_handler(int);
void irq_install();
void irq_remap();
void timer_install();
static const char* exception_messages[] = {
"Division by Zero",
"Debug",
"Non Maskable Interrupt",
"Breakpoint",
"Into Detected Overflow",
"Out of Bounds",
"Invalid Opcode",
"No Coprocessor",
"Double Fault",
"Coprocessor Segment Overrun",
"Bad TSS",
"Segment Not Present",
"Stack Fault",
"General Protection Fault",
"Page Fault",
"Unknown Interrupt",
"Coprocessor Fault",
"Alignment Check",
"Machine Check",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved",
"Reserved"
};

278
include/kernel/multiboot.h
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/* multiboot.h - Multiboot header file. */
/* Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL ANY
* DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef MULTIBOOT_HEADER
#define MULTIBOOT_HEADER 1
/* How many bytes from the start of the file we search for the header. */
#define MULTIBOOT_SEARCH 8192
#define MULTIBOOT_HEADER_ALIGN 4
/* The magic field should contain this. */
#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
/* This should be in %eax. */
#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
/* Alignment of multiboot modules. */
#define MULTIBOOT_MOD_ALIGN 0x00001000
/* Alignment of the multiboot info structure. */
#define MULTIBOOT_INFO_ALIGN 0x00000004
/* Flags set in the 'flags' member of the multiboot header. */
/* Align all boot modules on i386 page (4KB) boundaries. */
#define MULTIBOOT_PAGE_ALIGN 0x00000001
/* Must pass memory information to OS. */
#define MULTIBOOT_MEMORY_INFO 0x00000002
/* Must pass video information to OS. */
#define MULTIBOOT_VIDEO_MODE 0x00000004
/* This flag indicates the use of the address fields in the header. */
#define MULTIBOOT_AOUT_KLUDGE 0x00010000
/* Flags to be set in the 'flags' member of the multiboot info structure. */
/* is there basic lower/upper memory information? */
#define MULTIBOOT_INFO_MEMORY 0x00000001
/* is there a boot device set? */
#define MULTIBOOT_INFO_BOOTDEV 0x00000002
/* is the command-line defined? */
#define MULTIBOOT_INFO_CMDLINE 0x00000004
/* are there modules to do something with? */
#define MULTIBOOT_INFO_MODS 0x00000008
/* These next two are mutually exclusive */
/* is there a symbol table loaded? */
#define MULTIBOOT_INFO_AOUT_SYMS 0x00000010
/* is there an ELF section header table? */
#define MULTIBOOT_INFO_ELF_SHDR 0X00000020
/* is there a full memory map? */
#define MULTIBOOT_INFO_MEM_MAP 0x00000040
/* Is there drive info? */
#define MULTIBOOT_INFO_DRIVE_INFO 0x00000080
/* Is there a config table? */
#define MULTIBOOT_INFO_CONFIG_TABLE 0x00000100
/* Is there a boot loader name? */
#define MULTIBOOT_INFO_BOOT_LOADER_NAME 0x00000200
/* Is there a APM table? */
#define MULTIBOOT_INFO_APM_TABLE 0x00000400
/* Is there video information? */
#define MULTIBOOT_INFO_VBE_INFO 0x00000800
#define MULTIBOOT_INFO_FRAMEBUFFER_INFO 0x00001000
#ifndef ASM_FILE
typedef unsigned char multiboot_uint8_t;
typedef unsigned short multiboot_uint16_t;
typedef unsigned int multiboot_uint32_t;
typedef unsigned long long multiboot_uint64_t;
struct multiboot_header
{
/* Must be MULTIBOOT_MAGIC - see above. */
multiboot_uint32_t magic;
/* Feature flags. */
multiboot_uint32_t flags;
/* The above fields plus this one must equal 0 mod 2^32. */
multiboot_uint32_t checksum;
/* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
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;
/* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
multiboot_uint32_t mode_type;
multiboot_uint32_t width;
multiboot_uint32_t height;
multiboot_uint32_t depth;
};
/* The symbol table for a.out. */
struct multiboot_aout_symbol_table
{
multiboot_uint32_t tabsize;
multiboot_uint32_t strsize;
multiboot_uint32_t addr;
multiboot_uint32_t reserved;
};
typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
/* The section header table for ELF. */
struct multiboot_elf_section_header_table
{
multiboot_uint32_t num;
multiboot_uint32_t size;
multiboot_uint32_t addr;
multiboot_uint32_t shndx;
};
typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
struct multiboot_info
{
/* Multiboot info version number */
multiboot_uint32_t flags;
/* Available memory from BIOS */
multiboot_uint32_t mem_lower;
multiboot_uint32_t mem_upper;
/* "root" partition */
multiboot_uint32_t boot_device;
/* Kernel command line */
multiboot_uint32_t cmdline;
/* Boot-Module list */
multiboot_uint32_t mods_count;
multiboot_uint32_t mods_addr;
union
{
multiboot_aout_symbol_table_t aout_sym;
multiboot_elf_section_header_table_t elf_sec;
} u;
/* Memory Mapping buffer */
multiboot_uint32_t mmap_length;
multiboot_uint32_t mmap_addr;
/* Drive Info buffer */
multiboot_uint32_t drives_length;
multiboot_uint32_t drives_addr;
/* ROM configuration table */
multiboot_uint32_t config_table;
/* Boot Loader Name */
multiboot_uint32_t boot_loader_name;
/* APM table */
multiboot_uint32_t apm_table;
/* Video */
multiboot_uint32_t vbe_control_info;
multiboot_uint32_t vbe_mode_info;
multiboot_uint16_t vbe_mode;
multiboot_uint16_t vbe_interface_seg;
multiboot_uint16_t vbe_interface_off;
multiboot_uint16_t vbe_interface_len;
multiboot_uint64_t framebuffer_addr;
multiboot_uint32_t framebuffer_pitch;
multiboot_uint32_t framebuffer_width;
multiboot_uint32_t framebuffer_height;
multiboot_uint8_t framebuffer_bpp;
#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
multiboot_uint8_t framebuffer_type;
union
{
struct
{
multiboot_uint32_t framebuffer_palette_addr;
multiboot_uint16_t framebuffer_palette_num_colors;
};
struct
{
multiboot_uint8_t 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;
};
};
};
typedef struct multiboot_info multiboot_info_t;
struct multiboot_color
{
multiboot_uint8_t red;
multiboot_uint8_t green;
multiboot_uint8_t blue;
};
struct multiboot_mmap_entry
{
multiboot_uint32_t size;
multiboot_uint64_t addr;
multiboot_uint64_t len;
#define MULTIBOOT_MEMORY_AVAILABLE 1
#define MULTIBOOT_MEMORY_RESERVED 2
#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
#define MULTIBOOT_MEMORY_NVS 4
#define MULTIBOOT_MEMORY_BADRAM 5
multiboot_uint32_t type;
} __attribute__((packed));
typedef struct multiboot_mmap_entry multiboot_memory_map_t;
struct multiboot_mod_list
{
/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
multiboot_uint32_t mod_start;
multiboot_uint32_t mod_end;
/* Module command line */
multiboot_uint32_t cmdline;
/* padding to take it to 16 bytes (must be zero) */
multiboot_uint32_t pad;
};
typedef struct multiboot_mod_list multiboot_module_t;
/* APM BIOS info. */
struct multiboot_apm_info
{
multiboot_uint16_t version;
multiboot_uint16_t cseg;
multiboot_uint32_t offset;
multiboot_uint16_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;
};
#endif /* ! ASM_FILE */
#endif /* ! MULTIBOOT_HEADER */

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/*++
Copyright (c) 1998 Intel Corporation
Module Name:
efefind.h
Abstract:
EFI to compile bindings
Revision History
--*/
#ifndef X86_64_EFI_BIND
#define X86_64_EFI_BIND
#ifndef __GNUC__
#pragma pack()
#endif
#if defined(GNU_EFI_USE_MS_ABI)
#if (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)))||(defined(__clang__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 2)))
#define HAVE_USE_MS_ABI 1
#else
#error Compiler is too old for GNU_EFI_USE_MS_ABI
#endif
#endif
//
// Basic int types of various widths
//
#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L )
// No ANSI C 1999/2000 stdint.h integer width declarations
#if defined(_MSC_EXTENSIONS)
// Use Microsoft C compiler integer width declarations
typedef unsigned __int64 uint64_t;
typedef __int64 int64_t;
typedef unsigned __int32 uint32_t;
typedef __int32 int32_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned char uint8_t;
typedef char int8_t;
#elif defined(__GNUC__)
typedef int __attribute__((__mode__(__DI__))) int64_t;
typedef unsigned int __attribute__((__mode__(__DI__))) uint64_t;
typedef unsigned int uint32_t;
typedef int int32_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned char uint8_t;
typedef signed char int8_t;
#elif defined(UNIX_LP64)
/* Use LP64 programming model from C_FLAGS for integer width declarations */
typedef unsigned long uint64_t;
typedef long int64_t;
typedef unsigned int uint32_t;
typedef int int32_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned char uint8_t;
typedef char int8_t;
#else
/* Assume P64 programming model from C_FLAGS for integer width declarations */
typedef unsigned long long uint64_t __attribute__((aligned (8)));
typedef long long int64_t __attribute__((aligned (8)));
typedef unsigned int uint32_t;
typedef int int32_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned char uint8_t;
typedef char int8_t;
#endif
#elif defined(__GNUC__)
#include <stdint.h>
#endif
//
// Basic EFI types of various widths
//
#ifndef __WCHAR_TYPE__
# define __WCHAR_TYPE__ short
#endif
typedef uint64_t UINT64;
typedef int64_t INT64;
#ifndef _BASETSD_H_
typedef uint32_t UINT32;
typedef int32_t INT32;
#endif
typedef uint16_t UINT16;
typedef int16_t INT16;
typedef uint8_t UINT8;
typedef int8_t INT8;
typedef __WCHAR_TYPE__ WCHAR;
#undef VOID
#define VOID void
typedef int64_t INTN;
typedef uint64_t UINTN;
#ifdef EFI_NT_EMULATOR
#define POST_CODE(_Data)
#else
#ifdef EFI_DEBUG
#define POST_CODE(_Data) __asm mov eax,(_Data) __asm out 0x80,al
#else
#define POST_CODE(_Data)
#endif
#endif
#define EFIERR(a) (0x8000000000000000 | a)
#define EFI_ERROR_MASK 0x8000000000000000
#define EFIERR_OEM(a) (0xc000000000000000 | a)
#define BAD_POINTER 0xFBFBFBFBFBFBFBFB
#define MAX_ADDRESS 0xFFFFFFFFFFFFFFFF
#ifdef EFI_NT_EMULATOR
#define BREAKPOINT() __asm { int 3 }
#else
#define BREAKPOINT() while (TRUE); // Make it hang on Bios[Dbg]32
#endif
//
// Pointers must be aligned to these address to function
//
#define MIN_ALIGNMENT_SIZE 4
#define ALIGN_VARIABLE(Value ,Adjustment) \
(UINTN)Adjustment = 0; \
if((UINTN)Value % MIN_ALIGNMENT_SIZE) \
(UINTN)Adjustment = MIN_ALIGNMENT_SIZE - ((UINTN)Value % MIN_ALIGNMENT_SIZE); \
Value = (UINTN)Value + (UINTN)Adjustment
//
// Define macros to build data structure signatures from characters.
//
#define EFI_SIGNATURE_16(A,B) ((A) | (B<<8))
#define EFI_SIGNATURE_32(A,B,C,D) (EFI_SIGNATURE_16(A,B) | (EFI_SIGNATURE_16(C,D) << 16))
#define EFI_SIGNATURE_64(A,B,C,D,E,F,G,H) (EFI_SIGNATURE_32(A,B,C,D) | ((UINT64)(EFI_SIGNATURE_32(E,F,G,H)) << 32))
//
// To export & import functions in the EFI emulator environment
//
#ifdef EFI_NT_EMULATOR
#define EXPORTAPI __declspec( dllexport )
#else
#define EXPORTAPI
#endif
//
// EFIAPI - prototype calling convention for EFI function pointers
// BOOTSERVICE - prototype for implementation of a boot service interface
// RUNTIMESERVICE - prototype for implementation of a runtime service interface
// RUNTIMEFUNCTION - prototype for implementation of a runtime function that is not a service
// RUNTIME_CODE - pragma macro for declaring runtime code
//
#ifndef EFIAPI // Forces EFI calling conventions reguardless of compiler options
#ifdef _MSC_EXTENSIONS
#define EFIAPI __cdecl // Force C calling convention for Microsoft C compiler
#elif defined(HAVE_USE_MS_ABI)
// Force amd64/ms calling conventions.
#define EFIAPI __attribute__((ms_abi))
#else
#define EFIAPI // Substitute expresion to force C calling convention
#endif
#endif
#define BOOTSERVICE
//#define RUNTIMESERVICE(proto,a) alloc_text("rtcode",a); proto a
//#define RUNTIMEFUNCTION(proto,a) alloc_text("rtcode",a); proto a
#define RUNTIMESERVICE
#define RUNTIMEFUNCTION
#define RUNTIME_CODE(a) alloc_text("rtcode", a)
#define BEGIN_RUNTIME_DATA() data_seg("rtdata")
#define END_RUNTIME_DATA() data_seg("")
#define VOLATILE volatile
#define MEMORY_FENCE()
#ifdef EFI_NT_EMULATOR
//
// To help ensure proper coding of integrated drivers, they are
// compiled as DLLs. In NT they require a dll init entry pointer.
// The macro puts a stub entry point into the DLL so it will load.
//
#define EFI_DRIVER_ENTRY_POINT(InitFunction) \
UINTN \
__stdcall \
_DllMainCRTStartup ( \
UINTN Inst, \
UINTN reason_for_call, \
VOID *rserved \
) \
{ \
return 1; \
} \
\
int \
EXPORTAPI \
__cdecl \
InitializeDriver ( \
void *ImageHandle, \
void *SystemTable \
) \
{ \
return InitFunction(ImageHandle, SystemTable); \
}
#define LOAD_INTERNAL_DRIVER(_if, type, name, entry) \
(_if)->LoadInternal(type, name, NULL)
#else // EFI_NT_EMULATOR
//
// When build similiar to FW, then link everything together as
// one big module. For the MSVC toolchain, we simply tell the
// linker what our driver init function is using /ENTRY.
//
#if defined(_MSC_EXTENSIONS)
#define EFI_DRIVER_ENTRY_POINT(InitFunction) \
__pragma(comment(linker, "/ENTRY:" # InitFunction))
#else
#define EFI_DRIVER_ENTRY_POINT(InitFunction) \
UINTN \
InitializeDriver ( \
VOID *ImageHandle, \
VOID *SystemTable \
) \
{ \
return InitFunction(ImageHandle, \
SystemTable); \
} \
\
EFI_STATUS efi_main( \
EFI_HANDLE image, \
EFI_SYSTEM_TABLE *systab \
) __attribute__((weak, \
alias ("InitializeDriver")));
#endif
#define LOAD_INTERNAL_DRIVER(_if, type, name, entry) \
(_if)->LoadInternal(type, name, entry)
#endif // EFI_NT_EMULATOR
//
// Some compilers don't support the forward reference construct:
// typedef struct XXXXX
//
// The following macro provide a workaround for such cases.
//
#ifdef NO_INTERFACE_DECL
#define INTERFACE_DECL(x)
#else
#if defined(__GNUC__) || defined(_MSC_EXTENSIONS)
#define INTERFACE_DECL(x) struct x
#else
#define INTERFACE_DECL(x) typedef struct x
#endif
#endif
/* for x86_64, EFI_FUNCTION_WRAPPER must be defined */
#if defined(HAVE_USE_MS_ABI)
#define uefi_call_wrapper(func, va_num, ...) func(__VA_ARGS__)
#else
/*
Credits for macro-magic:
https://groups.google.com/forum/?fromgroups#!topic/comp.std.c/d-6Mj5Lko_s
http://efesx.com/2010/08/31/overloading-macros/
*/
#define __VA_NARG__(...) \
__VA_NARG_(_0, ## __VA_ARGS__, __RSEQ_N())
#define __VA_NARG_(...) \
__VA_ARG_N(__VA_ARGS__)
#define __VA_ARG_N( \
_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,N,...) N
#define __RSEQ_N() \
10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
#define __VA_ARG_NSUFFIX__(prefix,...) \
__VA_ARG_NSUFFIX_N(prefix, __VA_NARG__(__VA_ARGS__))
#define __VA_ARG_NSUFFIX_N(prefix,nargs) \
__VA_ARG_NSUFFIX_N_(prefix, nargs)
#define __VA_ARG_NSUFFIX_N_(prefix,nargs) \
prefix ## nargs
/* Prototypes of EFI cdecl -> stdcall trampolines */
UINT64 efi_call0(void *func);
UINT64 efi_call1(void *func, UINT64 arg1);
UINT64 efi_call2(void *func, UINT64 arg1, UINT64 arg2);
UINT64 efi_call3(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3);
UINT64 efi_call4(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
UINT64 arg4);
UINT64 efi_call5(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
UINT64 arg4, UINT64 arg5);
UINT64 efi_call6(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
UINT64 arg4, UINT64 arg5, UINT64 arg6);
UINT64 efi_call7(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
UINT64 arg4, UINT64 arg5, UINT64 arg6, UINT64 arg7);
UINT64 efi_call8(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
UINT64 arg4, UINT64 arg5, UINT64 arg6, UINT64 arg7,
UINT64 arg8);
UINT64 efi_call9(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
UINT64 arg4, UINT64 arg5, UINT64 arg6, UINT64 arg7,
UINT64 arg8, UINT64 arg9);
UINT64 efi_call10(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
UINT64 arg4, UINT64 arg5, UINT64 arg6, UINT64 arg7,
UINT64 arg8, UINT64 arg9, UINT64 arg10);
/* Front-ends to efi_callX to avoid compiler warnings */
#define _cast64_efi_call0(f) \
efi_call0(f)
#define _cast64_efi_call1(f,a1) \
efi_call1(f, (UINT64)(a1))
#define _cast64_efi_call2(f,a1,a2) \
efi_call2(f, (UINT64)(a1), (UINT64)(a2))
#define _cast64_efi_call3(f,a1,a2,a3) \
efi_call3(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3))
#define _cast64_efi_call4(f,a1,a2,a3,a4) \
efi_call4(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3), (UINT64)(a4))
#define _cast64_efi_call5(f,a1,a2,a3,a4,a5) \
efi_call5(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3), (UINT64)(a4), \
(UINT64)(a5))
#define _cast64_efi_call6(f,a1,a2,a3,a4,a5,a6) \
efi_call6(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3), (UINT64)(a4), \
(UINT64)(a5), (UINT64)(a6))
#define _cast64_efi_call7(f,a1,a2,a3,a4,a5,a6,a7) \
efi_call7(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3), (UINT64)(a4), \
(UINT64)(a5), (UINT64)(a6), (UINT64)(a7))
#define _cast64_efi_call8(f,a1,a2,a3,a4,a5,a6,a7,a8) \
efi_call8(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3), (UINT64)(a4), \
(UINT64)(a5), (UINT64)(a6), (UINT64)(a7), (UINT64)(a8))
#define _cast64_efi_call9(f,a1,a2,a3,a4,a5,a6,a7,a8,a9) \
efi_call9(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3), (UINT64)(a4), \
(UINT64)(a5), (UINT64)(a6), (UINT64)(a7), (UINT64)(a8), \
(UINT64)(a9))
#define _cast64_efi_call10(f,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10) \
efi_call10(f, (UINT64)(a1), (UINT64)(a2), (UINT64)(a3), (UINT64)(a4), \
(UINT64)(a5), (UINT64)(a6), (UINT64)(a7), (UINT64)(a8), \
(UINT64)(a9), (UINT64)(a10))
/* main wrapper (va_num ignored) */
#define uefi_call_wrapper(func,va_num,...) \
__VA_ARG_NSUFFIX__(_cast64_efi_call, __VA_ARGS__) (func , ##__VA_ARGS__)
#endif
#if defined(HAVE_USE_MS_ABI) && !defined(_MSC_EXTENSIONS)
#define EFI_FUNCTION __attribute__((ms_abi))
#else
#define EFI_FUNCTION
#endif
#ifdef _MSC_EXTENSIONS
#pragma warning ( disable : 4731 ) // Suppress warnings about modification of EBP
#endif
#endif

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#ifndef _EFI_ERR_H
#define _EFI_ERR_H
/*++
Copyright (c) 1998 Intel Corporation
Module Name:
efierr.h
Abstract:
EFI error codes
Revision History
--*/
#define EFIWARN(a) (a)
#define EFI_ERROR(a) (((INTN) a) < 0)
#define EFI_SUCCESS 0
#define EFI_LOAD_ERROR EFIERR(1)
#define EFI_INVALID_PARAMETER EFIERR(2)
#define EFI_UNSUPPORTED EFIERR(3)
#define EFI_BAD_BUFFER_SIZE EFIERR(4)
#define EFI_BUFFER_TOO_SMALL EFIERR(5)
#define EFI_NOT_READY EFIERR(6)
#define EFI_DEVICE_ERROR EFIERR(7)
#define EFI_WRITE_PROTECTED EFIERR(8)
#define EFI_OUT_OF_RESOURCES EFIERR(9)
#define EFI_VOLUME_CORRUPTED EFIERR(10)
#define EFI_VOLUME_FULL EFIERR(11)
#define EFI_NO_MEDIA EFIERR(12)
#define EFI_MEDIA_CHANGED EFIERR(13)
#define EFI_NOT_FOUND EFIERR(14)
#define EFI_ACCESS_DENIED EFIERR(15)
#define EFI_NO_RESPONSE EFIERR(16)
#define EFI_NO_MAPPING EFIERR(17)
#define EFI_TIMEOUT EFIERR(18)
#define EFI_NOT_STARTED EFIERR(19)
#define EFI_ALREADY_STARTED EFIERR(20)
#define EFI_ABORTED EFIERR(21)
#define EFI_ICMP_ERROR EFIERR(22)
#define EFI_TFTP_ERROR EFIERR(23)
#define EFI_PROTOCOL_ERROR EFIERR(24)
#define EFI_INCOMPATIBLE_VERSION EFIERR(25)
#define EFI_SECURITY_VIOLATION EFIERR(26)
#define EFI_CRC_ERROR EFIERR(27)
#define EFI_END_OF_MEDIA EFIERR(28)
#define EFI_END_OF_FILE EFIERR(31)
#define EFI_INVALID_LANGUAGE EFIERR(32)
#define EFI_COMPROMISED_DATA EFIERR(33)
#define EFI_WARN_UNKOWN_GLYPH EFIWARN(1)
#define EFI_WARN_DELETE_FAILURE EFIWARN(2)
#define EFI_WARN_WRITE_FAILURE EFIWARN(3)
#define EFI_WARN_BUFFER_TOO_SMALL EFIWARN(4)
#endif

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/*++
Copyright (c) 2004 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
EfiTypes.h
Abstract:
EFI defined types. Use these types when ever possible!
--*/
#ifndef _EFI_TYPES_H_
#define _EFI_TYPES_H_
//
// EFI Data Types based on ANSI C integer types in EfiBind.h
//
typedef uint8_t BOOLEAN;
typedef int64_t INTN;
typedef uint64_t UINTN;
typedef int8_t INT8;
typedef uint8_t UINT8;
typedef int16_t INT16;
typedef uint16_t UINT16;
typedef int32_t INT32;
typedef uint32_t UINT32;
typedef int64_t INT64;
typedef uint64_t UINT64;
typedef char CHAR8;
typedef uint16_t CHAR16;
typedef UINT64 EFI_LBA;
//
// Modifiers for EFI Data Types used to self document code.
// Please see EFI coding convention for proper usage.
//
#ifndef IN
//
// Some other envirnments use this construct, so #ifndef to prevent
// mulitple definition.
//
#define IN
#define OUT
#define OPTIONAL
#endif
#ifndef UNALIGNED
#define UNALIGNED
#endif
//
// Modifiers for EFI Runtime and Boot Services
//
#define EFI_RUNTIMESERVICE
#define EFI_BOOTSERVICE
//
// Boot Service add in EFI 1.1
//
#define EFI_BOOTSERVICE11
//
// Modifiers to absract standard types to aid in debug of problems
//
#define CONST const
#define STATIC static
#define VOID void
#define VOLATILE volatile
//
// Modifier to ensure that all protocol member functions and EFI intrinsics
// use the correct C calling convention. All protocol member functions and
// EFI intrinsics are required to modify thier member functions with EFIAPI.
//
#ifndef EFIAPI
#define EFIAPI _EFIAPI
#endif
//
// EFI Constants. They may exist in other build structures, so #ifndef them.
//
#ifndef TRUE
#define TRUE ((BOOLEAN) (1 == 1))
#endif
#ifndef FALSE
#define FALSE ((BOOLEAN) (0 == 1))
#endif
#ifndef NULL
#define NULL ((VOID *) 0)
#endif
//
// EFI Data Types derived from other EFI data types.
//
typedef UINTN EFI_STATUS;
typedef VOID *EFI_HANDLE;
#define NULL_HANDLE ((VOID *) 0)
typedef VOID *EFI_EVENT;
typedef UINTN EFI_TPL;
typedef struct {
UINT32 Data1;
UINT16 Data2;
UINT16 Data3;
UINT8 Data4[8];
} EFI_GUID;
typedef union {
EFI_GUID Guid;
UINT8 Raw[16];
} EFI_GUID_UNION;
//
// EFI Time Abstraction:
// Year: 2000 - 20XX
// Month: 1 - 12
// Day: 1 - 31
// Hour: 0 - 23
// Minute: 0 - 59
// Second: 0 - 59
// Nanosecond: 0 - 999,999,999
// TimeZone: -1440 to 1440 or 2047
//
typedef struct {
UINT16 Year;
UINT8 Month;
UINT8 Day;
UINT8 Hour;
UINT8 Minute;
UINT8 Second;
UINT8 Pad1;
UINT32 Nanosecond;
INT16 TimeZone;
UINT8 Daylight;
UINT8 Pad2;
} EFI_TIME;
//
// Bit definitions for EFI_TIME.Daylight
//
#define EFI_TIME_ADJUST_DAYLIGHT 0x01
#define EFI_TIME_IN_DAYLIGHT 0x02
//
// Value definition for EFI_TIME.TimeZone
//
#define EFI_UNSPECIFIED_TIMEZONE 0x07FF
//
// Networking
//
typedef struct {
UINT8 Addr[4];
} EFI_IPv4_ADDRESS;
typedef struct {
UINT8 Addr[16];
} EFI_IPv6_ADDRESS;
typedef struct {
UINT8 Addr[32];
} EFI_MAC_ADDRESS;
typedef union {
UINT32 Addr[4];
EFI_IPv4_ADDRESS v4;
EFI_IPv6_ADDRESS v6;
} EFI_IP_ADDRESS;
typedef enum {
EfiReservedMemoryType,
EfiLoaderCode,
EfiLoaderData,
EfiBootServicesCode,
EfiBootServicesData,
EfiRuntimeServicesCode,
EfiRuntimeServicesData,
EfiConventionalMemory,
EfiUnusableMemory,
EfiACPIReclaimMemory,
EfiACPIMemoryNVS,
EfiMemoryMappedIO,
EfiMemoryMappedIOPortSpace,
EfiPalCode,
EfiPersistentMemory,
EfiMaxMemoryType
} EFI_MEMORY_TYPE;
typedef enum {
AllocateAnyPages,
AllocateMaxAddress,
AllocateAddress,
MaxAllocateType
} EFI_ALLOCATE_TYPE;
typedef struct {
UINT64 Signature;
UINT32 Revision;
UINT32 HeaderSize;
UINT32 CRC32;
UINT32 Reserved;
} EFI_TABLE_HEADER;
//
// possible caching types for the memory range
//
#define EFI_MEMORY_UC 0x0000000000000001
#define EFI_MEMORY_WC 0x0000000000000002
#define EFI_MEMORY_WT 0x0000000000000004
#define EFI_MEMORY_WB 0x0000000000000008
#define EFI_MEMORY_UCE 0x0000000000000010
//
// physical memory protection on range
//
#define EFI_MEMORY_WP 0x0000000000001000
#define EFI_MEMORY_RP 0x0000000000002000
#define EFI_MEMORY_XP 0x0000000000004000
//
// range requires a runtime mapping
//
#define EFI_MEMORY_RUNTIME 0x8000000000000000ULL
typedef UINT64 EFI_PHYSICAL_ADDRESS;
typedef UINT64 EFI_VIRTUAL_ADDRESS;
#define EFI_MEMORY_DESCRIPTOR_VERSION 1
typedef struct {
UINT32 Type;
UINT32 Pad;
EFI_PHYSICAL_ADDRESS PhysicalStart;
EFI_VIRTUAL_ADDRESS VirtualStart;
UINT64 NumberOfPages;
UINT64 Attribute;
} EFI_MEMORY_DESCRIPTOR;
//
// The EFI memory allocation functions work in units of EFI_PAGEs that are
// 4K. This should in no way be confused with the page size of the processor.
// An EFI_PAGE is just the quanta of memory in EFI.
//
#define EFI_PAGE_SIZE 4096
#define EFI_PAGE_MASK 0xFFF
#define EFI_PAGE_SHIFT 12
#define EFI_SIZE_TO_PAGES(a) (((a) >> EFI_PAGE_SHIFT) + (((a) & EFI_PAGE_MASK) ? 1 : 0))
#define EFI_PAGES_TO_SIZE(a) ( (a) << EFI_PAGE_SHIFT)
//
// ALIGN_POINTER - aligns a pointer to the lowest boundary
//
#define ALIGN_POINTER(p, s) ((VOID *) (p + ((s - ((UINTN) p)) & (s - 1))))
//
// ALIGN_VARIABLE - aligns a variable up to the next natural boundary for int size of a processor
//
#define ALIGN_VARIABLE(Value, Adjustment) \
(UINTN) Adjustment = 0; \
if ((UINTN) Value % sizeof (UINTN)) { \
(UINTN) Adjustment = sizeof (UINTN) - ((UINTN) Value % sizeof (UINTN)); \
} \
Value = (UINTN) Value + (UINTN) Adjustment
//
// EFI_FIELD_OFFSET - returns the byte offset to a field within a structure
//
#define EFI_FIELD_OFFSET(TYPE,Field) ((UINTN)(&(((TYPE *) 0)->Field)))
//
// CONTAINING_RECORD - returns a pointer to the structure
// from one of it's elements.
//
#define _CR(Record, TYPE, Field) ((TYPE *) ((CHAR8 *) (Record) - (CHAR8 *) &(((TYPE *) 0)->Field)))
//
// Define macros to build data structure signatures from characters.
//
#define EFI_SIGNATURE_16(A, B) ((A) | (B << 8))
#define EFI_SIGNATURE_32(A, B, C, D) (EFI_SIGNATURE_16 (A, B) | (EFI_SIGNATURE_16 (C, D) << 16))
#define EFI_SIGNATURE_64(A, B, C, D, E, F, G, H) \
(EFI_SIGNATURE_32 (A, B, C, D) | ((UINT64) (EFI_SIGNATURE_32 (E, F, G, H)) << 32))
#endif

7
iso/boot/grub/grub.cfg
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@ -1,7 +0,0 @@
set timeout=10
set default=0
menuentry "ProjectRED" {
multiboot /boot/red.kernel
boot
}

5
iso/boot/grub/menu.lst
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@ -1,5 +0,0 @@
defualt=0
timeout=0
title ProjectRED
kernel /boot/kernel.elf

BIN
iso/boot/grub/stage2_eltorito
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Binary file not shown.

98
kernel/bootstrap.c Normal file
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@ -0,0 +1,98 @@
/************************
*** Team Kitty, 2019 ***
*** Sync ***
***********************/
/* This file contains all of the functions required to handle
* the system handover from Syncboot.
*/
#include <kernel.h>
static void UpdateSegments(void);
static void InstallInterrupt(size_t ISR, size_t Function);
static void InstallTrap(size_t ISR, size_t Function);
/* Main system handover from UEFI.
* Prepares the processor, the screen, and memory. */
void PrepareSystem(FILELOADER_PARAMS* FLOP) {
Memory_Info.MemoryMap = FLOP->MemoryMap;
Memory_Info.MemoryMapSize = FLOP->MemoryMap_Size;
Memory_Info.MemoryMapDescriptorSize = FLOP->MemoryMapDescriptorSize;
Memory_Info.MemoryMapDescriptorVersion = FLOP->MemoryMapDescriptorVersion;
if(SetIdentityMap(FLOP->RTServices) == NULL) {
Memory_Info.MemoryMap = FLOP->MemoryMap;
}
SetupPrinting(FLOP->GPU_Info->GPUs[0]);
/* All print functions are now available. */
PrepareAVX();
/* Bit 5 of CR0 is Numeric Error, which enables
* the internal x87 Floating Point Math error
* reporting. */
size_t CR0 = ReadControlRegister(0);
// Mask CR0 to only see bit 5
if( !(CR0 & (1 << 5))) {
// Preserve CR0, but set bit 5.
size_t TempReg = CR0 ^ (1 << 5);
// Write it back
WriteControlRegister(0, TempReg);
// Double check. Some processors can be tricky.
TempReg = ReadControlRegister(CR0);
if(TempReg == CR0)
printf("Error setting CR0.NE\r\n");
}
/* Bit 10 of CR4 is OSXMMEXCPT, which enables
* SSE instructions. */
size_t CR4 = ReadControlRegister(4);
// Mask CR4 to only see bit 10
if( !(CR4 & (1 << 10))) {
// Preserve CR4, but set bit 10.
size_t TempReg = CR4 ^ (1 << 10);
// Write it back
WriteControlRegister(4, TempReg);
// Double check. Some processors can be tricky.
TempReg = ReadControlRegister(4);
if(TempReg == CR4)
printf("Error setting CR4.OSXMMEXCPT\r\n");
}
// Set up memory management
InstallGDT();
InstallIDT();
InstallMemoryMap();
InstallPaging();
// Clean up UEFI's mess
ReclaimEfiBootServicesMemory();
ReclaimEfiLoaderCodeMemory();
// Let Intel ME take over power management
PreparePowerManagement();
}
/* A temporary system for keeping track of system performance. */
size_t ClockTick() {
// We will be reading a register, so we need to split it up.
size_t RegHigh = 0, RegLow = 0;
__asm__ __volatile__("rdtscp" : "=a" (RegLow), "=d" (RegHigh) : : "%rcx");
}

86
kernel/kernel.c
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@ -3,88 +3,84 @@
*** Sync ***
***********************/
/* This file contains the entry point
* to the kernel. This section consists
* mainly of bootloading functions.
/*
* Sync main..
*
* Going off the back of Syncboot, the UEFI bootloader which currently only supports x86_64,
* this kernel is to be rewritten. The kernel is started in Long Mode, with interrupts enabled.
*
* Therefore, most of the checks are no longer needed, as they are performed by Syncboot for us.
* So, this becomes an exercise in time saving.
*
*
* Graphics and memory will be setup
* at later stages.
*/
//#include <stdio.h>
#include <kernel.h>
#include <kernel/tty.h>
#include <kernel/serial.h>
#include <kernel/descriptor_tables.h>
void gdb_end() {} /* GDB Debugging stump */
int kernel_main(void) {
/* The kernel is started in 32-bit protected mode by the ASM. */
/* Here, we start by enabling the screen, then loading a GDT and IDT into the actual places they need to be. */
/* The kernel is started in 64-bit Long Mode by Syncboot. */
/* Here, we start by drawing a splash, then loading a GDT and IDT into the placeholder UEFI gives us. */
/* Black the screen out. */
screen_initialize();
/* Prepare the serial line for our debug output. */
init_serial();
serial_print(0x3F8, "[INFO] Serial ready.\r\n");
/* Not sure how well serial would work in UEFI. */
// TODO: look at this.
//init_serial();
//serial_print(0x3F8, "[INFO] Serial ready.\r\n");
serial_print(0x3F8, "[INFO] Beginning GDT subroutine.\r\n");
//serial_print(0x3F8, "[INFO] Beginning GDT subroutine.\r\n");
/* term_writes: writes a string to the terminal. */
term_writes("GDT...");
//term_writes("GDT...");
/* Prepares the Global Descriptor Table, called from gdt.c */
gdt_install();
/* puts: writes a line to the terminal. */
puts("GDT Ready.");
serial_print(0x3F8, "[INFO] GDT subroutine complete.\r\n");
//puts("GDT Ready.");
//serial_print(0x3F8, "[INFO] GDT subroutine complete.\r\n");
/* Prepare the Interrupt Descriptor Table. */
serial_print(0x3F8, "[INFO] Beginning IDT subroutine.\r\n");
term_writes("IDT...");
//serial_print(0x3F8, "[INFO] Beginning IDT subroutine.\r\n");
//term_writes("IDT...");
idt_install();
puts("IDT Ready.");
serial_print(0x3F8, "[INFO] IDT subroutine complete.\r\n[INFO] Enabling interrupts.\r\n");
//puts("IDT Ready.");
//serial_print(0x3F8, "[INFO] IDT subroutine complete.\r\n[INFO] Enabling interrupts.\r\n");
gdb_end(); /* The first important step. Waypoint it for gdb debugging. */
term_writes("Memory available:");
/* TODO: implement check_a20, which double-triple checks the state of the A20 line. */
//if(check_a20())
puts(" 4GB");
serial_print(0x3F8, "[INFO] A20 enabled. 4GB memory available.");
//term_writes("Memory available:");
/* The first important thing: start the system clock immediately. */
serial_print(0x3F8, "[INFO] Starting System Clock.\r\n");
term_writes("Timer...");
//serial_print(0x3F8, "[INFO] Starting System Clock.\r\n");
//term_writes("Timer...");
timer_install();
puts("Timer Ready.");
//puts("Timer Ready.");
serial_print(0x3F8, "[INFO] All subsystems ready. Printing message.\r\n");
//serial_print(0x3F8, "[INFO] All subsystems ready. Printing message.\r\n");
/* Everything is ready; print a pretty message. */
term_setcolor(RED);
term_writes("\n(c)");
term_setcolor(GREEN);
term_writes(" Sync");
term_setcolor(WHITE);
term_writes(", 2019\n");
//term_setcolor(RED);
//term_writes("\n(c)");
//term_setcolor(GREEN);
//term_writes(" Sync");
//term_setcolor(WHITE);
//term_writes(", 2019\n");
serial_print(0x3F8, "[INFO] All operations complete. Checking for other tasks...\r\n");
//serial_print(0x3F8, "[INFO] All operations complete. Checking for other tasks...\r\n");
/* Here are a series of tests for the ANSI escape code and CSI implementations. */
term_writes("\x1b[BA"); /* Down a line, then A. */
//term_writes("\x1b[BA"); /* Down a line, then A. */
/* A stub causing a Divide by Zero error. */
serial_print(0x3F8, "[DEBUG] Attempting a Divide by Zero error.\r\n");
char div = (5 / 0);
serial_print(0x3F8, "[DEBUG] Survived the error!\r\n");
//serial_print(0x3F8, "[DEBUG] Attempting a Divide by Zero error.\r\n");
//char div = (5 / 0);
//serial_print(0x3F8, "[DEBUG] Survived the error!\r\n");
gdb_end(); /* Everything is done. The last debug routine. */
return 0;

4
kernel/serial.c
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@ -8,6 +8,10 @@
* a text buffer, or a file, but this code should work on
* hardware with an actual serial port and monitor. */
/* After the development of Syncboot, this becomes a little bit harder.
* Some testing will be needed to know for certain whether this will work.
* Until then, this is to be put on hold. 21/07/19 - Curle */
#include <kernel/utils.h>
#include <stdarg.h>
#include <stdint.h>

3
libc/.gitignore vendored
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@ -1,3 +0,0 @@
*.a
*.d
*.o

91
libc/Makefile
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@ -1,91 +0,0 @@
DEFAULT_HOST!=../default-host.sh
HOST?=DEFAULT_HOST
HOSTARCH!==../target-to-arch.sh $(HOST)
CFLAGS?=-O2 -g
CPPFLAGS?=
LDFLAGS?=
LIBS?=
DESTDIR?=
PREFIX?=/usr/local
EXEC_PREFIX?=$(PREFIX)
INCLUDEDIR?=$(PREFIX)/include
LIBDIR?=$(EXEC_PREFIX)/lib
CFLAGS:=$(CFLAGS) -ffreestanding -Wall -Wextra
CPPFLAGS:=$(CPPFLAGS) -D__is_libc -Iinclude
LIBK_CFLAGS:=$(CFLAGS)
LIBK_CPPFLAGS:=$(CPPFLAGS) -D__is_libk
ARCHDIR=arch/$(HOSTARCH)
include $(ARCHDIR)/make.config
CFLAGS:=$(CFLAGS) $(ARCH_CFLAGS)
CPPFLAGS:=$(CPPFLAGS) $(ARCH_CPPFLAGS)
LIBK_CFLAGS:=$(LIBK_CFLAGS) $(KERNEL_ARCH_CFLAGS)
LIBK_CPPFLAGS:=$(LIBK_CPPFLAGS) $(KERNEL_ARCH_CPPFLAGS)
FREEOBJS=\
$(ARCH_FREEOBJS)\
stdio/printf.o\
stdio/putchar.o\
stdio/puts.o\
stdlib/abort.o\
string/memcmp.o\
string/memcpy.o\
string/memmove.o\
string/memset.o\
string/strlen.o\
HOSTEDOBJS=\
$(ARCH_HOSTEDOBJS)\
OBJS=\
$(FREEOBJS)\
$(HOSTEDOBJS)\
LIBK_OBJS=$(FREEOBJS:.o=.libk.o)
BINARIES=libk.a
.PHONY: all clean install install-headers install-libs
.SUFFIXES: .o .libk.o .c .s
all: $(BINARIES)
libc.a: $(OBJS)
$(AR) rcs $@ $(OBJS)
libk.a: $(LIBK_OBJS)
$(AR) rcs $@ $(LIBK_OBJS)
.c.o:
$(CC) -MD -c $< -o $@ -std=gnull $(CFLAGS) $(CPPFLAGS)
.c.s:
$(CC) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS)
.c.libk.o:
$(CC) -MD -c $< -o $@ -std=gnull $(LIBK_CFLAGS) $(LIBK_CPPFLAGS)
.s.libk.o:
$(CC) -MD -c $< -o $@ $(LIBK_CFLAGS) $(LIBK_CPPFLAGS)
clean:
rm -f $(BINARIES) *.a
rm -f $(OBJS) $(LIBK_OBJS) *.o */*.o */*/*.o
rm -f $(OBJS:.o=.d) $(LIBK_OBJS:.o=.d) *.d */*.d */*/*.d
install: install-headers install-libs
install-headers:
mkdir -p $(DESTDIR)$(INCLUDEDIR)
cp -R --preserve-timestamps include/. $(DESTDIR)$(INCLUDEDIR)/.
install-libs: $(BINARIES)
mkdir -p $(DESTDIR)$(LIBDIR)
cp $(BINARIES) $(DESTDIR) $(LIBDIR)
-include $(OBJS:.o=.d)
-include $(LIBK_OBJS:.o=.d)

8
libc/arch/i386/make.config
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@ -1,8 +0,0 @@
ARCH_CFLAGS=
ARCH_CPPFLAGS=
KERNEL_ARCH_CFLAGS=
KERNEL_ARCH_CPPFLAGS=
ARCH_FREEOBJS=\
ARCH_HOSTEDOBJS=\

0
libc/include/errno.h
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19
libc/include/stdio.h
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@ -1,19 +0,0 @@
#ifndef _STDIO_H
#define _STDIO_H 1
#include <sys/cdefs.h>
#define EOF (-1)
struct __sFile {
int unused;
};
typedef struct __sFile FILE;
#define stderr (_impure_ptr->_stderr)
int printf(const char* __restrict, ...);
int putchar(int);
int puts(const char*);
#endif

594
libc/include/stdlib.h
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@ -1,594 +0,0 @@
#ifndef _STDLIB_H
#define _STDLIB_H 1
#include <sys/cdefs.h>
__attribute__((__noreturn__)) void abort(void);
/*
Default header file for malloc-2.8.x, written by Doug Lea
and released to the public domain, as explained at
http://creativecommons.org/publicdomain/zero/1.0/
This header is for ANSI C/C++ only. You can set any of
the following #defines before including:
* If USE_DL_PREFIX is defined, it is assumed that malloc.c
was also compiled with this option, so all routines
have names starting with "dl".
* If HAVE_USR_INCLUDE_MALLOC_H is defined, it is assumed that this
file will be #included AFTER <malloc.h>. This is needed only if
your system defines a struct mallinfo that is incompatible with the
standard one declared here. Otherwise, you can include this file
INSTEAD of your system system <malloc.h>. At least on ANSI, all
declarations should be compatible with system versions
* If MSPACES is defined, declarations for mspace versions are included.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stddef.h> /* for size_t */
#ifndef ONLY_MSPACES
#define ONLY_MSPACES 0 /* define to a value */
#elif ONLY_MSPACES != 0
#define ONLY_MSPACES 1
#endif /* ONLY_MSPACES */
#ifndef NO_MALLINFO
#define NO_MALLINFO 0
#endif /* NO_MALLINFO */
#ifndef MSPACES
#if ONLY_MSPACES
#define MSPACES 1
#else /* ONLY_MSPACES */
#define MSPACES 0
#endif /* ONLY_MSPACES */
#endif /* MSPACES */
#if !ONLY_MSPACES
#if !NO_MALLINFO
#ifndef HAVE_USR_INCLUDE_MALLOC_H
#ifndef _MALLOC_H
#ifndef MALLINFO_FIELD_TYPE
#define MALLINFO_FIELD_TYPE size_t
#endif /* MALLINFO_FIELD_TYPE */
#ifndef STRUCT_MALLINFO_DECLARED
#define STRUCT_MALLINFO_DECLARED 1
struct mallinfo {
MALLINFO_FIELD_TYPE arena; /* non-mmapped space allocated from system */
MALLINFO_FIELD_TYPE ordblks; /* number of free chunks */
MALLINFO_FIELD_TYPE smblks; /* always 0 */
MALLINFO_FIELD_TYPE hblks; /* always 0 */
MALLINFO_FIELD_TYPE hblkhd; /* space in mmapped regions */
MALLINFO_FIELD_TYPE usmblks; /* maximum total allocated space */
MALLINFO_FIELD_TYPE fsmblks; /* always 0 */
MALLINFO_FIELD_TYPE uordblks; /* total allocated space */
MALLINFO_FIELD_TYPE fordblks; /* total free space */
MALLINFO_FIELD_TYPE keepcost; /* releasable (via malloc_trim) space */
};
#endif /* STRUCT_MALLINFO_DECLARED */
#endif /* _MALLOC_H */
#endif /* HAVE_USR_INCLUDE_MALLOC_H */
#endif /* !NO_MALLINFO */
/*
malloc(size_t n)
Returns a pointer to a newly allocated chunk of at least n bytes, or
null if no space is available, in which case errno is set to ENOMEM
on ANSI C systems.
If n is zero, malloc returns a minimum-sized chunk. (The minimum
size is 16 bytes on most 32bit systems, and 32 bytes on 64bit
systems.) Note that size_t is an unsigned type, so calls with
arguments that would be negative if signed are interpreted as
requests for huge amounts of space, which will often fail. The
maximum supported value of n differs across systems, but is in all
cases less than the maximum representable value of a size_t.
*/
void* malloc(size_t);
/*
free(void* p)
Releases the chunk of memory pointed to by p, that had been previously
allocated using malloc or a related routine such as realloc.
It has no effect if p is null. If p was not malloced or already
freed, free(p) will by default cuase the current program to abort.
*/
void free(void*);
/*
calloc(size_t n_elements, size_t element_size);
Returns a pointer to n_elements * element_size bytes, with all locations
set to zero.
*/
void* calloc(size_t, size_t);
/*
realloc(void* p, size_t n)
Returns a pointer to a chunk of size n that contains the same data
as does chunk p up to the minimum of (n, p's size) bytes, or null
if no space is available.
The returned pointer may or may not be the same as p. The algorithm
prefers extending p in most cases when possible, otherwise it
employs the equivalent of a malloc-copy-free sequence.
If p is null, realloc is equivalent to malloc.
If space is not available, realloc returns null, errno is set (if on
ANSI) and p is NOT freed.
if n is for fewer bytes than already held by p, the newly unused
space is lopped off and freed if possible. realloc with a size
argument of zero (re)allocates a minimum-sized chunk.
The old unix realloc convention of allowing the last-free'd chunk
to be used as an argument to realloc is not supported.
*/
void* realloc(void*, size_t);
/*
realloc_in_place(void* p, size_t n)
Resizes the space allocated for p to size n, only if this can be
done without moving p (i.e., only if there is adjacent space
available if n is greater than p's current allocated size, or n is
less than or equal to p's size). This may be used instead of plain
realloc if an alternative allocation strategy is needed upon failure
to expand space; for example, reallocation of a buffer that must be
memory-aligned or cleared. You can use realloc_in_place to trigger
these alternatives only when needed.
Returns p if successful; otherwise null.
*/
void* realloc_in_place(void*, size_t);
/*
memalign(size_t alignment, size_t n);
Returns a pointer to a newly allocated chunk of n bytes, aligned
in accord with the alignment argument.
The alignment argument should be a power of two. If the argument is
not a power of two, the nearest greater power is used.
8-byte alignment is guaranteed by normal malloc calls, so don't
bother calling memalign with an argument of 8 or less.
Overreliance on memalign is a sure way to fragment space.
*/
void* memalign(size_t, size_t);
/*
int posix_memalign(void** pp, size_t alignment, size_t n);
Allocates a chunk of n bytes, aligned in accord with the alignment
argument. Differs from memalign only in that it (1) assigns the
allocated memory to *pp rather than returning it, (2) fails and
returns EINVAL if the alignment is not a power of two (3) fails and
returns ENOMEM if memory cannot be allocated.
*/
int posix_memalign(void**, size_t, size_t);
/*
valloc(size_t n);
Equivalent to memalign(pagesize, n), where pagesize is the page
size of the system. If the pagesize is unknown, 4096 is used.
*/
void* valloc(size_t);
/*
mallopt(int parameter_number, int parameter_value)
Sets tunable parameters The format is to provide a
(parameter-number, parameter-value) pair. mallopt then sets the
corresponding parameter to the argument value if it can (i.e., so
long as the value is meaningful), and returns 1 if successful else
0. SVID/XPG/ANSI defines four standard param numbers for mallopt,
normally defined in malloc.h. None of these are use in this malloc,
so setting them has no effect. But this malloc also supports other
options in mallopt:
Symbol param # default allowed param values
M_TRIM_THRESHOLD -1 2*1024*1024 any (-1U disables trimming)
M_GRANULARITY -2 page size any power of 2 >= page size
M_MMAP_THRESHOLD -3 256*1024 any (or 0 if no MMAP support)
*/
int mallopt(int, int);
#define M_TRIM_THRESHOLD (-1)
#define M_GRANULARITY (-2)
#define M_MMAP_THRESHOLD (-3)
/*
malloc_footprint();
Returns the number of bytes obtained from the system. The total
number of bytes allocated by malloc, realloc etc., is less than this
value. Unlike mallinfo, this function returns only a precomputed
result, so can be called frequently to monitor memory consumption.
Even if locks are otherwise defined, this function does not use them,
so results might not be up to date.
*/
size_t malloc_footprint(void);
/*
malloc_max_footprint();
Returns the maximum number of bytes obtained from the system. This
value will be greater than current footprint if deallocated space
has been reclaimed by the system. The peak number of bytes allocated
by malloc, realloc etc., is less than this value. Unlike mallinfo,
this function returns only a precomputed result, so can be called
frequently to monitor memory consumption. Even if locks are
otherwise defined, this function does not use them, so results might
not be up to date.
*/
size_t malloc_max_footprint(void);
/*
malloc_footprint_limit();
Returns the number of bytes that the heap is allowed to obtain from
the system, returning the last value returned by
malloc_set_footprint_limit, or the maximum size_t value if
never set. The returned value reflects a permission. There is no
guarantee that this number of bytes can actually be obtained from
the system.
*/
size_t malloc_footprint_limit(void);
/*
malloc_set_footprint_limit();
Sets the maximum number of bytes to obtain from the system, causing
failure returns from malloc and related functions upon attempts to
exceed this value. The argument value may be subject to page
rounding to an enforceable limit; this actual value is returned.
Using an argument of the maximum possible size_t effectively
disables checks. If the argument is less than or equal to the
current malloc_footprint, then all future allocations that require
additional system memory will fail. However, invocation cannot
retroactively deallocate existing used memory.
*/
size_t malloc_set_footprint_limit(size_t bytes);
/*
malloc_inspect_all(void(*handler)(void *start,
void *end,
size_t used_bytes,
void* callback_arg),
void* arg);
Traverses the heap and calls the given handler for each managed
region, skipping all bytes that are (or may be) used for bookkeeping
purposes. Traversal does not include include chunks that have been
directly memory mapped. Each reported region begins at the start
address, and continues up to but not including the end address. The
first used_bytes of the region contain allocated data. If
used_bytes is zero, the region is unallocated. The handler is
invoked with the given callback argument. If locks are defined, they
are held during the entire traversal. It is a bad idea to invoke
other malloc functions from within the handler.
For example, to count the number of in-use chunks with size greater
than 1000, you could write:
static int count = 0;
void count_chunks(void* start, void* end, size_t used, void* arg) {
if (used >= 1000) ++count;
}
then:
malloc_inspect_all(count_chunks, NULL);
malloc_inspect_all is compiled only if MALLOC_INSPECT_ALL is defined.
*/
void malloc_inspect_all(void (*handler)(void*, void*, size_t, void*), void* arg);
#if !NO_MALLINFO
/*
mallinfo()
Returns (by copy) a struct containing various summary statistics:
arena: current total non-mmapped bytes allocated from system
ordblks: the number of free chunks
smblks: always zero.
hblks: current number of mmapped regions
hblkhd: total bytes held in mmapped regions
usmblks: the maximum total allocated space. This will be greater
than current total if trimming has occurred.
fsmblks: always zero
uordblks: current total allocated space (normal or mmapped)
fordblks: total free space
keepcost: the maximum number of bytes that could ideally be released
back to system via malloc_trim. ("ideally" means that
it ignores page restrictions etc.)
Because these fields are ints, but internal bookkeeping may
be kept as longs, the reported values may wrap around zero and
thus be inaccurate.
*/
struct mallinfo mallinfo(void);
#endif /* NO_MALLINFO */
/*
independent_calloc(size_t n_elements, size_t element_size, void* chunks[]);
independent_calloc is similar to calloc, but instead of returning a
single cleared space, it returns an array of pointers to n_elements
independent elements that can hold contents of size elem_size, each
of which starts out cleared, and can be independently freed,
realloc'ed etc. The elements are guaranteed to be adjacently
allocated (this is not guaranteed to occur with multiple callocs or
mallocs), which may also improve cache locality in some
applications.
The "chunks" argument is optional (i.e., may be null, which is
probably the most typical usage). If it is null, the returned array
is itself dynamically allocated and should also be freed when it is
no longer needed. Otherwise, the chunks array must be of at least
n_elements in length. It is filled in with the pointers to the
chunks.
In either case, independent_calloc returns this pointer array, or
null if the allocation failed. If n_elements is zero and "chunks"
is null, it returns a chunk representing an array with zero elements
(which should be freed if not wanted).
Each element must be freed when it is no longer needed. This can be
done all at once using bulk_free.
independent_calloc simplifies and speeds up implementations of many
kinds of pools. It may also be useful when constructing large data
structures that initially have a fixed number of fixed-sized nodes,
but the number is not known at compile time, and some of the nodes
may later need to be freed. For example:
struct Node { int item; struct Node* next; };
struct Node* build_list() {
struct Node** pool;
int n = read_number_of_nodes_needed();
if (n <= 0) return 0;
pool = (struct Node**)(independent_calloc(n, sizeof(struct Node), 0);
if (pool == 0) die();
// organize into a linked list...
struct Node* first = pool[0];
for (i = 0; i < n-1; ++i)
pool[i]->next = pool[i+1];
free(pool); // Can now free the array (or not, if it is needed later)
return first;
}
*/
void** independent_calloc(size_t, size_t, void**);
/*
independent_comalloc(size_t n_elements, size_t sizes[], void* chunks[]);
independent_comalloc allocates, all at once, a set of n_elements
chunks with sizes indicated in the "sizes" array. It returns
an array of pointers to these elements, each of which can be
independently freed, realloc'ed etc. The elements are guaranteed to
be adjacently allocated (this is not guaranteed to occur with
multiple callocs or mallocs), which may also improve cache locality
in some applications.
The "chunks" argument is optional (i.e., may be null). If it is null
the returned array is itself dynamically allocated and should also
be freed when it is no longer needed. Otherwise, the chunks array
must be of at least n_elements in length. It is filled in with the
pointers to the chunks.
In either case, independent_comalloc returns this pointer array, or
null if the allocation failed. If n_elements is zero and chunks is
null, it returns a chunk representing an array with zero elements
(which should be freed if not wanted).
Each element must be freed when it is no longer needed. This can be
done all at once using bulk_free.
independent_comallac differs from independent_calloc in that each
element may have a different size, and also that it does not
automatically clear elements.
independent_comalloc can be used to speed up allocation in cases
where several structs or objects must always be allocated at the
same time. For example:
struct Head { ... }
struct Foot { ... }
void send_message(char* msg) {
int msglen = strlen(msg);
size_t sizes[3] = { sizeof(struct Head), msglen, sizeof(struct Foot) };
void* chunks[3];
if (independent_comalloc(3, sizes, chunks) == 0)
die();
struct Head* head = (struct Head*)(chunks[0]);
char* body = (char*)(chunks[1]);
struct Foot* foot = (struct Foot*)(chunks[2]);
// ...
}
In general though, independent_comalloc is worth using only for
larger values of n_elements. For small values, you probably won't
detect enough difference from series of malloc calls to bother.
Overuse of independent_comalloc can increase overall memory usage,
since it cannot reuse existing noncontiguous small chunks that
might be available for some of the elements.
*/
void** independent_comalloc(size_t, size_t*, void**);
/*
bulk_free(void* array[], size_t n_elements)
Frees and clears (sets to null) each non-null pointer in the given
array. This is likely to be faster than freeing them one-by-one.
If footers are used, pointers that have been allocated in different
mspaces are not freed or cleared, and the count of all such pointers
is returned. For large arrays of pointers with poor locality, it
may be worthwhile to sort this array before calling bulk_free.
*/
size_t bulk_free(void**, size_t n_elements);
/*
pvalloc(size_t n);
Equivalent to valloc(minimum-page-that-holds(n)), that is,
round up n to nearest pagesize.
*/
void* pvalloc(size_t);
/*
malloc_trim(size_t pad);
If possible, gives memory back to the system (via negative arguments
to sbrk) if there is unused memory at the `high' end of the malloc
pool or in unused MMAP segments. You can call this after freeing
large blocks of memory to potentially reduce the system-level memory
requirements of a program. However, it cannot guarantee to reduce
memory. Under some allocation patterns, some large free blocks of
memory will be locked between two used chunks, so they cannot be
given back to the system.
The `pad' argument to malloc_trim represents the amount of free
trailing space to leave untrimmed. If this argument is zero, only
the minimum amount of memory to maintain internal data structures
will be left. Non-zero arguments can be supplied to maintain enough
trailing space to service future expected allocations without having
to re-obtain memory from the system.
Malloc_trim returns 1 if it actually released any memory, else 0.
*/
int malloc_trim(size_t);
/*
malloc_stats();
Prints on stderr the amount of space obtained from the system (both
via sbrk and mmap), the maximum amount (which may be more than
current if malloc_trim and/or munmap got called), and the current
number of bytes allocated via malloc (or realloc, etc) but not yet
freed. Note that this is the number of bytes allocated, not the
number requested. It will be larger than the number requested
because of alignment and bookkeeping overhead. Because it includes
alignment wastage as being in use, this figure may be greater than
zero even when no user-level chunks are allocated.
The reported current and maximum system memory can be inaccurate if
a program makes other calls to system memory allocation functions
(normally sbrk) outside of malloc.
malloc_stats prints only the most commonly interesting statistics.
More information can be obtained by calling mallinfo.
malloc_stats is not compiled if NO_MALLOC_STATS is defined.
*/
void malloc_stats(void);
#endif /* !ONLY_MSPACES */
/*
malloc_usable_size(void* p);
Returns the number of bytes you can actually use in
an allocated chunk, which may be more than you requested (although
often not) due to alignment and minimum size constraints.
You can use this many bytes without worrying about
overwriting other allocated objects. This is not a particularly great
programming practice. malloc_usable_size can be more useful in
debugging and assertions, for example:
p = malloc(n);
assert(malloc_usable_size(p) >= 256);
*/
size_t malloc_usable_size(const void*);
#if MSPACES
/*
mspace is an opaque type representing an independent
region of space that supports mspace_malloc, etc.
*/
typedef void* mspace;
/*
create_mspace creates and returns a new independent space with the
given initial capacity, or, if 0, the default granularity size. It
returns null if there is no system memory available to create the
space. If argument locked is non-zero, the space uses a separate
lock to control access. The capacity of the space will grow
dynamically as needed to service mspace_malloc requests. You can
control the sizes of incremental increases of this space by
compiling with a different DEFAULT_GRANULARITY or dynamically
setting with mallopt(M_GRANULARITY, value).
*/
mspace create_mspace(size_t capacity, int locked);
/*
destroy_mspace destroys the given space, and attempts to return all
of its memory back to the system, returning the total number of
bytes freed. After destruction, the results of access to all memory
used by the space become undefined.
*/
size_t destroy_mspace(mspace msp);
/*
create_mspace_with_base uses the memory supplied as the initial base
of a new mspace. Part (less than 128*sizeof(size_t) bytes) of this
space is used for bookkeeping, so the capacity must be at least this
large. (Otherwise 0 is returned.) When this initial space is
exhausted, additional memory will be obtained from the system.
Destroying this space will deallocate all additionally allocated
space (if possible) but not the initial base.
*/
mspace create_mspace_with_base(void* base, size_t capacity, int locked);
/*
mspace_track_large_chunks controls whether requests for large chunks
are allocated in their own untracked mmapped regions, separate from
others in this mspace. By default large chunks are not tracked,
which reduces fragmentation. However, such chunks are not
necessarily released to the system upon destroy_mspace. Enabling
tracking by setting to true may increase fragmentation, but avoids
leakage when relying on destroy_mspace to release all memory
allocated using this space. The function returns the previous
setting.
*/
int mspace_track_large_chunks(mspace msp, int enable);
#if !NO_MALLINFO
/*
mspace_mallinfo behaves as mallinfo, but reports properties of
the given space.
*/
struct mallinfo mspace_mallinfo(mspace msp);
#endif /* NO_MALLINFO */
/*
An alias for mallopt.
*/
int mspace_mallopt(int, int);
/*
The following operate identically to their malloc counterparts
but operate only for the given mspace argument
*/
void* mspace_malloc(mspace msp, size_t bytes);
void mspace_free(mspace msp, void* mem);
void* mspace_calloc(mspace msp, size_t n_elements, size_t elem_size);
void* mspace_realloc(mspace msp, void* mem, size_t newsize);
void* mspace_realloc_in_place(mspace msp, void* mem, size_t newsize);
void* mspace_memalign(mspace msp, size_t alignment, size_t bytes);
void** mspace_independent_calloc(mspace msp, size_t n_elements, size_t elem_size, void* chunks[]);
void** mspace_independent_comalloc(mspace msp, size_t n_elements, size_t sizes[], void* chunks[]);
size_t mspace_bulk_free(mspace msp, void**, size_t n_elements);
size_t mspace_usable_size(const void* mem);
void mspace_malloc_stats(mspace msp);
int mspace_trim(mspace msp, size_t pad);
size_t mspace_footprint(mspace msp);
size_t mspace_max_footprint(mspace msp);
size_t mspace_footprint_limit(mspace msp);
size_t mspace_set_footprint_limit(mspace msp, size_t bytes);
void mspace_inspect_all(mspace msp, void (*handler)(void*, void*, size_t, void*), void* arg);
#endif /* MSPACES */
#ifdef __cplusplus
}; /* end of extern "C" */
#endif
#endif /* MALLOC_280_H */

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libc/include/string.h
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@ -1,13 +0,0 @@
#ifndef _STRING_H
#define _STRING_H 1
#include <stddef.h>
#include <sys/cdefs.h>
int memcmp(const void*, const void*, size_t);
void* memcpy(void* __restrict, const void* __restrict, size_t);
void* memmove(void*, const void*, size_t);
void* memset(void*, int, size_t);
size_t strlen(const char*);
#endif

5
libc/include/sys/cdefs.h
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@ -1,5 +0,0 @@
#ifndef _SYS_CDEFS_H
#define _SYS_CDEFS_H 1
#define __red_libc 1
#endif

0
libc/include/sys/types.h
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93
libc/stdio/printf.c
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@ -1,93 +0,0 @@
#include <limits.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
static bool print(const char* data, size_t length) {
const unsigned char* bytes = (const unsigned char*)data;
for (size_t i = 0; i < length; i++)
if (putchar(bytes[i]) == EOF)
return false' return true;
}
int printf(const char* restrict format, ...) {
va_list parameters;
va_start(parameters, format);
int written = 0;
while (*format != '\0') {
size_t maxrem = INT_MAX - writen;
if (format[0] != '%' || format[1] == '%') {
if (format[0] == '%')
format++;
size_t amount = 1;
while (format[amount] && format[amount] != '%')
amount++;
if (maxrem < amount) {
// TODO: Set an OVERFLOW error
return -1;
}
if ((!print(format, amount))
return -1;
format += amount;
written += amount;
continue;
}
const char* first_format = format++;
switch (*format) {
case 'c':
format++;
char c = (char)va_arg(parameters, int);
if (!maxrem) {
// TODO: Set OVERFLOW
return -1;
}
if (!print(&c, sizeof(c)))
return -1;
written++;
break;
case 's':
format++;
const char* str = va_arg(parameters, const char*);
size_t len = strlen(str);
if (maxrem < len) {
// TODO: Set OVERFLOW
return -1;
}
if (!print(str, len))
return -1;
written += len;
break;
default:
format = first_format;
size_t len = strlen(format);
if (maxrem < len) {
// TODO: Set OVERFLOW
return -1;
}
if (!print(format, len))
return -1;
written += len;
format += len;
break;
}
}
va_end(parameters);
return written;
}

15
libc/stdio/putchar.c
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@ -1,15 +0,0 @@
#include <stdio.h>
#if defined(__is_libk)
#include <kernel/tty.h>
#endif
int putchar(int ic) {
#if defined(__is_libk)
char c = (char)ic;
term_write(&c, sizeof(c));
#else
// TODO: Implement stdio & the write call
#endif
return ic;
}

5
libc/stdio/puts.c
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@ -1,5 +0,0 @@
#include <stdio.h>
int puts(const char* string) {
return printf("%s\n"), string);
}

15
libc/stdlib/abort.c
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@ -1,15 +0,0 @@
#include <stdio.h>
#include <stdlib.h>
__attribute__((__noreturn__)) void abort(void) {
#if defined(__is_libk)
// TODO: Kernel panic.
printf(">>PANIC<<<\n abort() panicked!\n");
#else
printf("abort() called\n");
#endif
while (1) {
}
__builtin_unreachable();
}

13
libc/string/memcmp.c
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@ -1,13 +0,0 @@
#include <string.h>
int memcmp(const void* aptr, const void* bptr, size_t size_ {
const unsigned char* a = (const unsigned char*)aptr;
const unsigned char* b = (const unsigned char*)bptr;
for (size_t i = 0; i < size; i++) {
if(a[i] < b[i]
return -1
else if(b[i] < a[i])
return 1;
}
return 0;

14
libc/string/memmove.c
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@ -1,14 +0,0 @@
#include <string.h>
void* memmove(void* dstptr, const void* srcptr, size_t size) {
unsigned char* dst = (unsigned char*)dstptr;
const unsigned char* stc = (const unsigned char*)srcptr;
if (dst < src) {
for (size_t i = o; i < size; i++)
dst[i] = src[i];
} else {
for (size_t i = size; i != 0; i--)
dst[i - 1] = src[i - 1];
}
return dstptr;
}

8
libc/string/memset.c
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@ -1,8 +0,0 @@
#include <string.h>
void* memset(void* bufptr, int value, size_t size) {
unsigned char* buf = (unsigned char*)bufptr;
for (size_t i = 0; i < size; i++)
buf[i] = (unsigned char)value;
return bufptr;
}

7
libc/string/strlen.c
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@ -1,7 +0,0 @@
#include <string.h>
size_t strlen(const char* str) {
size_t len = 0;
while (str[len])
len++ return len;
}

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