feat(tools): dump partition table

boot/bootsect/Makefile

@@ -1,10 +1,15 @@
 TARGET = boot_floppy1440.bin \
-		boot_floppy2880.bin 
+		boot_floppy2880.bin \
+		boot_mbr.bin
 
 FLOPPY_SRCS	= floppy.asm \
 			../common/const.inc \
 			../common/fat12.inc
 
+MBR_SRCS = mbr.asm \
+			../common/const.inc \
+			../common/fat12.inc
+
 .PHONY: all
 all: $(TARGET)
 
@@ -14,6 +19,9 @@ boot_floppy1440.bin: $(FLOPPY_SRCS)
 boot_floppy2880.bin: $(FLOPPY_SRCS)
 	$(AS) -DFLOPPY_SIZE=FLOPPY_2880 floppy.asm $@
 
+boot_mbr.bin: $(MBR_SRCS)
+	$(AS) mbr.asm $@
+
 .PHONY: clean
 clean:
 	$(RM) $(TARGET)

boot/bootsect/floppy.asm

@@ -70,11 +70,6 @@ _start:
 
 	; search in root directory
 
-	mov si, kernel_file
-	call fat_search_root
-	jc .error_not_found
-	mov [kernel_start], ax
-
 	mov si, stage1_file
 	call fat_search_root
 	jc .error_not_found
@@ -91,13 +86,6 @@ _start:
 
 	call disk_read_sectors
 
-	; preload kernel
-	mov ax, KERNEL_PRELOAD/0x10
-	mov es, ax
-	mov ax, [kernel_start]
-	xor bx, bx
-	call fat_load_binary
-
 	; load stage 2
 	mov ax, LOADER_BASE/0x10
 	mov es, ax
@@ -124,10 +112,8 @@ _start:
 msg_error     db "ERROR: ", 0
 msg_not_found db " not found", CR, LF, 0
 
-kernel_file db "VMSTUPIDSYS", 0
 stage1_file db "STPDLDR SYS", 0
 
-kernel_start dw 0x0
 stage1_start dw 0x0
 
 

boot/bootsect/mbr.asm

@@ -0,0 +1,32 @@
+	format binary
+	use16
+
+	include '../common/const.inc'
+	include '../common/macro.inc'
+
+	org MBR_BASE
+	cli
+	xor ax, ax
+	mov ds, ax
+	mov es, ax
+	mov ss, ax
+	mov sp, ax
+	cld
+	; relocate from 0x7C00 to 0x0600
+	mov cx, 0x0100
+	mov si, BOOTSECT_BASE
+	mov di, MBR_BASE
+	rep movsw
+	jmp 0x0:start
+start:
+	; TODO: read partition table and load bootable one.
+
+	times 436-($-$$) db 0x90
+UID db 'STUPIDDISK'
+	; partition table
+PT1 db 16 dup(0)
+PT2 db 16 dup(0)
+PT3 db 16 dup(0)
+PT4 db 16 dup(0)
+	; magic
+	db 0x55, 0xAA

boot/common/const.inc

@@ -2,6 +2,7 @@ CR   = 0x0D
 LF   = 0x0A
 
 ; -------- Address ----------
+MBR_BASE       = 0x0600
 BOOTSECT_BASE  = 0x7C00
 LOADER_BASE    = 0x1000
 MULTIBOOT_BASE = 0x100000

boot/efi/uefi.inc

@@ -139,6 +139,7 @@ defn EFI_SYSTEM_TABLE
 EFI_BOOT_SERVICES_SIGNATURE = 0x56524553544f4f42
 EFI_BOOT_SERVICES_REVISION  = EFI_SPECIFICATION_VERSION
 
+	;; Struct: EFI_BOOT_SERVICES
 struc EFI_BOOT_SERVICES
 {
 	.Hdr EFI_TABLE_HEADER
@@ -150,6 +151,7 @@ struc EFI_BOOT_SERVICES
 EFI_RUNTIMES_SERVICES_SIGNATURE = 0x56524553544e5552
 EFI_RUNTIMES_SERVICES_REVISION  = EFI_SPECIFICATION_VERSION
 
+	;; Struct: EFI_RUNTIMES_SERVICES
 struc EFI_RUNTIMES_SERVICES
 {
 	.Hdr EFI_TABLE_HEADER
@@ -161,6 +163,7 @@ struc EFI_RUNTIMES_SERVICES
 EFI_LOADED_IMAGE_PROTOCOL_GUID equ 0x5B1B31A1, 0x9562, 0x11d2, 0x8E, 0x3F, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3D
 EFI_LOADED_IMAGE_PROTOCOL_REVISION = 0x1000
 
+	;; Struct: EFI_LOADED_IMAGE_PROTOCOL
 struc EFI_LOADED_IMAGE_PROTOCOL
 {
 	.Revision       UINT32

boot/loader/loader.asm

@@ -2,6 +2,7 @@
 	format binary
 
 	include '../common/const.inc'
+	include '../common/macro.inc'
 	include 'multiboot.inc'
 
 	org LOADER_BASE
@@ -76,6 +77,7 @@ _start:
 	include 'gdt.inc'
 
 msg_stage2        db "StupidOS Loader", CR, LF, 0
+kernel_fat12_file db "VMSTUPIDSYS", 0
 msg_error_a20     db "ERROR: can't enable a20 line", CR, LF, 0
 msg_error_memory  db "ERROR: can't detect available memory", CR, LF, 0
 

boot/loader/memory.inc

@@ -1,28 +1,78 @@
+	;; File: memory.inc
+	;; Detect available memory 
+	;; 
 
-        ; 0xE820 Get System Memory Map
+	;; Constants: Address type
-        ; EAX=0x0000E820
+	;;
-        ; EDX=0x534D4150
+	;; See <AddressRange.Type>
-        ; EBX=0x0 or continuation value
+	;;
-        ; ECX=buffer size
+	;; ADDRESS_RANGE_MEMORY   - Available and usable RAM.
-        ; ES:SI = buffer
+	;; ADDRESS_RANGE_RESERVED - Reserved or in use.
-memory_do_E820:
+ADDRESS_RANGE_MEMORY   = 1
+ADDRESS_RANGE_RESERVED = 2
+
+	;; Struct: AddressRange
+struc AddressRange
+{
+	;; Variable: BaseAddrLow
+	;; Low 32 Bits of Base Address
+	.BaseAddrLow  dd ?
+	;; Variable: BaseAddrHigh
+	;; High 32 Bits of Base Address
+	.BaseAddrHigh dd ?
+	;; Variable: LengthLow
+	;; Low 32 Bits of Length in Bytes
+	.LengthLow    dd ?
+	;; Variable: LengthHigh
+	;; High 32 Bits of Length in Bytes
+	.LengthHigh   dd ?
+	;; Variable: Type
+	;; Address type of this range. <Address type>
+	.Type         db ?
+}
+defn AddressRange
+
+    ;; Function: memory_e820_get_mmap_entry
+	;; 
+	;; In:
+	;;    EAX   - Function code
+	;;    EBX   - Continuation
+	;;    ES:DI - Buffer Pointer
+	;;    ECX   - Buffer size
+	;;    EDX   - Signature 'SMAP'
+	;;
+	;; Out:
+	;;    CF    - Carry Flag
+	;;    EAX   - Signature 'SMAP'
+	;;    ES:DI - Buffer Pointer
+	;;    ECX   - Buffer Size
+	;;    EBX   - Continuation
+memory_e820_get_map:
+	mov eax, 0xE820
+	mov ebx, 0x0
+	mov ecx, 'SMAP'
 
 	ret
 
+	;; Function: memory_get_for_large_conf
+	;;
+	;; In:
+	;;     AX - Function code E801h
+	;;
+	;; Out:
+	;;     CF - Non-Carry - indicates no error
+	;;     AX - Extended 1
+	;;     BX - Extended 2
+	;;     CX - Configured 1
+	;;     DX - Configured 2
+
+	;; Function: memory_get_extended_memory_size
+	;;
+	;; In:
+	;;    AH - Function code 88h
+	;;  
+    ;; Out:
+	;;    CF - Non-Carry - indicates no error
+	;;    AX - Number of contiguous KB above 1MB
 memory_get_map:
-        call memory_do_E820
-        jnc .end
-
-        ; try 0x88
-        clc
-        mov ah, 0x88
-        int 0x15
-        jc .error
-        test ax, ax
-        je .error
-.end:
-        clc
-        ret
-.error:
-        stc
 	ret

boot/loader/video.inc

@@ -1,2 +1,62 @@
+struc VesaInfo
+{
+	.Signature             dd ?
+	.Version               dw ?
+	.OEMNamePtr            dd ?
+	.Capabilities          dd ?
+	.VideoModesOffset      dw ?
+	.VideoModesSegment     dw ?
+	.CountOf64KBlocks      dw ?
+	.OEMSoftwareRevision   dw ?
+	.OEMVendorNamePtr      dd ?
+	.OEMProductNamePtr     dd ?
+	.OEMProductRevisionPtr dd ?
+	.Reserved              db 222 dup(?)
+	.OEMData               db 256 dup(?)
+}
+
+struc VesaModeInfo
+{
+	.ModeAttributes    dw ?
+	.WindowAAttributes db ?
+	.WindowBAttributes db ?
+	.WindowGranularity dw ?
+	.WindowSize        dw ?
+	.SegmentWindowA    dw ?
+	.SegmentWindowB    dw ?
+	.WindowPositioning dd ?
+	.BytesPerScanLine  dw ?
+
+	; --  
+	.Width            dw ?
+	.Height           dw ?
+	.WidthChar        db ?
+	.HeightChar       db ?
+	.PlanesCount      db ?
+	.BitsPerPixel     db ?
+	.BanksCount       db ?
+	.MemoryModel      db ?
+	.BankSize         db ?
+	.ImagePagesCount  db ?
+	.Reserved         db ?
+
+	.RedMaskSize          db ?
+	.RedFieldPosition     db ?
+	.GreenMaskSize        db ?
+	.GreenFieldPosition   db ?
+	.BlueMaskSize         db ?
+	.BlueFieldPosition    db ?
+	.ReservedMaskSize     db ?
+	.ReservedMaskPosition db ?
+	.DirectColorModeInfo  db ?
+
+	; -- VBE v1.2+
+	.Framebuffer           dd ?
+	.OffScreenMemoryOffset dd ?
+	.OffScreenMemorySize   dd ?
+	.Reserved2             db 206 dup(?)
+}
+defn VesaModeInfo
+
 video_setup:
 	ret

include/fs/echfs.h

@@ -0,0 +1,8 @@
+#ifndef ECHFS_H
+# define ECHFS_H 1
+
+typedef struct {
+
+} EchFSIdentityTable;
+
+#endif /* !ECHFS_H */

sbin/parted/Makefile

@@ -0,0 +1,16 @@
+TARGET	= parted
+SRCS	= main.c
+OBJS	= $(SRCS:.c=.o)
+
+.PHONY: all
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(CC) -o $@ $^ $(LDFLAGS)
+
+.PHONY: clean
+clean:
+	$(RM) $(TARGET) $(OBJS)
+
+.PHONY: install
+install: $(TARGET)

sbin/parted/main.c

@@ -0,0 +1,157 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+#define MBR_MAGIC0 0x55
+#define MBR_MAGIC1 0xAA
+
+#define MBR_PART_BOOTABLE (1 << 7)
+
+enum {
+	MBR_PART_TYPE_EMPTY          = 0x00,
+	MBR_PART_TYPE_FAT12          = 0x01,
+	MBR_PART_TYPE_FAT16          = 0x04,
+	MBR_PART_TYPE_GPT_PROTECTIVE = 0xEE,
+	MBR_PART_TYPE_EFI            = 0xEF
+};
+
+typedef struct partition {
+	uint8_t attributes;
+	uint8_t chs_start[3];
+	uint8_t type;
+	uint8_t chs_last_sector[3];
+	uint32_t lba_start;
+	uint32_t sectors_count;
+} __attribute__((packed)) Partition;
+
+typedef struct mbr_header {
+	uint8_t raw[436];
+	uint8_t uid[10];
+	struct partition part[4];
+	uint8_t magic[2];
+} __attribute__((packed)) MBRHeader;
+
+static char *prg_name = NULL;
+static int dump_info = 0;
+static const char *diskpath = NULL;
+static FILE *diskfd = NULL;
+static MBRHeader header;
+
+static void
+dump_partition_info(Partition part)
+{
+	printf("\tBootable: ");
+	if (part.attributes & MBR_PART_BOOTABLE)
+	{
+		printf("yes\n");
+	}
+	else
+	{
+		printf("no\n");	
+	}
+	printf("\tType: %d\n", part.type);
+	printf("\tLBA Start: %d\n", part.lba_start);
+	printf("\tSectors: %d\n", part.sectors_count);
+}
+
+static void
+dump_disk(void)
+{
+	int idx;
+
+	printf("UID: ");
+	for (idx = 0; idx < 10; idx++)
+	{
+		printf("%02X", header.uid[idx]);
+	}
+	printf("\n");
+
+	for (idx = 0; idx < 4; idx++)
+	{
+		printf("Partition %d:\n", idx);
+		dump_partition_info(header.part[idx]);
+	}
+}
+
+static void
+usage(int retcode)
+{
+	if (retcode == EXIT_FAILURE)
+	{
+		fprintf(stderr, "Try '%s -h' for more information.\n", prg_name);
+	}
+	else
+	{
+		printf("Usage: %s [-hVd] disk\n", prg_name);
+		printf("\t-h\tdisplay this help and exit\n");
+		printf("\t-V\toutput version information.\n");
+		printf("\t-d\tdump disk information\n");
+		printf("\t-o out\twrite to file 'out'\n");
+		printf("\nReport bugs to <%s>\n", MK_BUGREPORT);
+	}
+
+	exit(retcode);
+}
+
+static void
+version(void)
+{
+	printf("%s commit %s\n", prg_name, MK_COMMIT);
+	exit(EXIT_SUCCESS);
+}
+
+int
+main(int argc, char **argv)
+{
+	prg_name = argv[0];
+
+	while ((argc > 1) && (argv[1][0] == '-'))
+	{
+		switch (argv[1][1])
+		{
+			case 'h':
+				usage(EXIT_SUCCESS);
+				break;
+			case 'V':
+				version();
+				break;
+			case 'd':
+				dump_info = 1;
+				break;
+			default:
+				usage(EXIT_FAILURE);
+		}
+
+		argv++;
+		argc--;
+	}
+
+	if (argc <= 1) usage(EXIT_FAILURE);
+
+	diskpath = argv[1];
+	diskfd = fopen(diskpath, "rb");
+	if (diskfd == NULL)
+	{
+		fprintf(stderr, "%s: %s\n", diskpath, strerror(errno));
+		return (EXIT_FAILURE);
+	}
+
+	if (fread(&header, sizeof(uint8_t), sizeof(MBRHeader), diskfd) != sizeof(MBRHeader))
+	{
+		fprintf(stderr, "%s: can't read mbr header\n", diskpath);
+		return (EXIT_FAILURE);
+	}
+	if (header.magic[0] != MBR_MAGIC0 || header.magic[1] != MBR_MAGIC1)
+	{
+		fprintf(stderr, "%s: no valid MBR\n", diskpath);
+		return (EXIT_FAILURE);
+	}
+
+	if (dump_info)
+	{
+		dump_disk();
+	}
+
+	return (EXIT_SUCCESS);
+}

tools/Makefile

@@ -1,7 +1,7 @@
 CC	= gcc
 RM	= rm -f
 
-TARGET	= fat$(EXEXT) coff-ld$(EXEXT)
+TARGET	= fat$(EXEXT) coff-ld$(EXEXT) parted$(EXEXT)
 
 CFLAGS	= -DMK_COMMIT="$(MK_COMMIT)" -DMK_BUGREPORT="$(MK_BUGREPORT)" -I../include
 LDFLAGS	=
@@ -15,6 +15,9 @@ fat$(EXEXT): fat.c
 coff-ld$(EXEXT): coff-ld.c
 	$(CC) -o $@ $^ $(CFLAGS) $(LDFLAGS)
 
+parted$(EXEXT): ../sbin/parted/main.c
+	$(CC) -o $@ $^ $(CFLAGS) $(LDFLAGS)
+
 .PHONY: install
 install: $(TARGET)