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syslinux
syslinux-4.04-isohybrid_efi.patch
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File syslinux-4.04-isohybrid_efi.patch of Package syslinux
Index: syslinux-4.04/mbr/altmbr.S =================================================================== --- syslinux-4.04.orig/mbr/altmbr.S +++ syslinux-4.04/mbr/altmbr.S @@ -204,7 +204,7 @@ scan_partition_table: 5: decb (partition) jz boot - addw $16, %bx + addw $16, %si loopw 5b popw %cx /* %cx <- 4 */ Index: syslinux-4.04/mbr/isohdpfx.S =================================================================== --- syslinux-4.04.orig/mbr/isohdpfx.S +++ syslinux-4.04/mbr/isohdpfx.S @@ -66,6 +66,37 @@ bootsec: .globl _start _start: .byte 0x33, 0xed /* xorw %bp, %bp */ + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + .byte 0x33, 0xed /* xorw %bp, %bp */ cli movw %bp, %ss movw $stack, %sp Index: syslinux-4.04/mbr/mbr.S =================================================================== --- syslinux-4.04.orig/mbr/mbr.S +++ syslinux-4.04/mbr/mbr.S @@ -265,6 +265,19 @@ boot: movl %eax, 8(%si) /* Adjust in-memory partition table entry */ call read_sector jc disk_error + + /* Check if the read sector is a XFS superblock */ + cmpl $0x42534658, (bootsec) /* "XFSB" */ + jne no_xfs + + /* We put the Syslinux boot sector at offset 0x800 (4 sectors), so we + * need to adjust %eax (%eax + 4) to read the right sector into 0x7C00. + */ + addl $0x800 >> 0x09, %eax /* plus 4 sectors */ + call read_sector + jc disk_error + +no_xfs: cmpw $0xaa55, (bootsec+510) jne missing_os /* Not a valid boot sector */ movw $driveno, %sp /* driveno == bootsec-6 */ Index: syslinux-4.04/utils/Makefile =================================================================== --- syslinux-4.04.orig/utils/Makefile +++ syslinux-4.04/utils/Makefile @@ -47,7 +47,7 @@ isohdpfx.c: $(ISOHDPFX) isohdpfxarray.pl $(PERL) isohdpfxarray.pl $(ISOHDPFX) > $@ isohybrid: isohybrid.o isohdpfx.o - $(CC) $(LDFLAGS) -o $@ $^ + $(CC) $(LDFLAGS) -o $@ $^ -luuid gethostip: gethostip.o $(CC) $(LDFLAGS) -o $@ $^ Index: syslinux-4.04/utils/isohybrid.c =================================================================== --- syslinux-4.04.orig/utils/isohybrid.c +++ syslinux-4.04/utils/isohybrid.c @@ -36,21 +36,29 @@ #include <unistd.h> #include <sys/stat.h> #include <inttypes.h> +#include <uuid/uuid.h> #include "isohybrid.h" char *prog = NULL; extern int opterr, optind; +uuid_t disk_uuid, part_uuid, iso_uuid; + uint8_t mode = 0; -enum { VERBOSE = 1 }; +enum { VERBOSE = 1 , EFI = 2 , MAC = 4 , MODE_GPT = 8 , MODE_MBR = 0x10 }; + +/* partition numbers (1 based) */ +int part_data = 0; +int part_efi = 0; +int part_mac = 0; /* user options */ uint16_t head = 64; /* 1 <= head <= 256 */ uint8_t sector = 32; /* 1 <= sector <= 63 */ -uint8_t entry = 1; /* partition number: 1 <= entry <= 4 */ -uint8_t offset = 0; /* partition offset: 0 <= offset <= 64 */ +uint8_t entry = 0; /* partition number: 1 <= entry <= 4 */ +uint32_t offset = 0; /* partition offset: 0 <= offset <= 0xFFFFFFFF(4294967296) */ uint16_t type = 0x17; /* partition type: 0 <= type <= 255 */ uint32_t id = 0; /* MBR: 0 <= id <= 0xFFFFFFFF(4294967296) */ @@ -59,12 +67,153 @@ uint8_t partok = 0; /* 0 <= uint16_t ve[16]; uint32_t catoffset = 0; -uint32_t c = 0, cc = 0, cs = 0; +uint32_t c = 0; + +off_t iso_size = 0; +off_t iso_filesize = 0; /* boot catalogue parameters */ uint32_t de_lba = 0; uint16_t de_seg = 0, de_count = 0, de_mbz2 = 0; uint8_t de_boot = 0, de_media = 0, de_sys = 0, de_mbz1 = 0; +uint32_t efi_lba = 0, mac_lba = 0; +uint32_t efi_count = 0, mac_count = 0; +uint8_t efi_boot = 0, efi_media = 0, efi_sys = 0; + +int apm_parts = 3; + +uint8_t afp_header[] = { 0x45, 0x52, 0x08, 0x00, 0x00, 0x00, 0x90, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + +uuid_t efi_system_partition = {0xC1, 0x2A, 0x73, 0x28, 0xF8, 0x1F, 0x11, 0xD2, 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B}; +uuid_t basic_partition = {0xEB,0xD0,0xA0,0xA2,0xB9,0xE5,0x44,0x33,0x87,0xC0,0x68,0xB6,0xB7,0x26,0x99,0xC7}; +uuid_t hfs_partition = {0x48, 0x46, 0x53, 0x00, 0x00, 0x00, 0x11, 0xAA, 0xAA, 0x11, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC}; + +uint32_t crc_tab[256] = +{ + 0, 0x77073096, 0xEE0E612C, 0x990951BA, + 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, + 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, + 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, + 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, + 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, + 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, + 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, + 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, + 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, + 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, + 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, + 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, + 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, + 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, + 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, + 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, + 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, + 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, + 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, + 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, + 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, + 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, + 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, + 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, + 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, + 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, + 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, + 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, + 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, + 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, + 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, + 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, + 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, + 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, + 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, + 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, + 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, + 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, + 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, + 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, + 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, + 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, + 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, + 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, + 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, + 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, + 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, + 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, + 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, + 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, + 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, + 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, + 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, + 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, + 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, + 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, + 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, + 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, + 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D +}; + +struct iso_primary_descriptor { + uint8_t ignore [80]; + uint32_t size; + uint8_t ignore2 [44]; + uint16_t block_size; +}; + +struct gpt_header { + uint64_t signature; + uint32_t revision; + uint32_t headerSize; + uint32_t headerCRC; + uint32_t reserved; + uint64_t currentLBA; + uint64_t backupLBA; + uint64_t firstUsableLBA; + uint64_t lastUsableLBA; + uuid_t diskGUID; + uint64_t partitionEntriesLBA; + uint32_t numParts; + uint32_t sizeOfPartitionEntries; + uint32_t partitionEntriesCRC; + uint8_t reserved2[420]; +}; + +struct gpt_part_header { + uuid_t partTypeGUID; + uuid_t partGUID; + uint64_t firstLBA; + uint64_t lastLBA; + uint64_t attributes; + uint16_t name[36]; +}; + +#define APM_OFFSET 2048 + +struct apple_part_header { + uint16_t signature; /* expected to be MAC_PARTITION_MAGIC */ + uint16_t res1; + uint32_t map_count; /* # blocks in partition map */ + uint32_t start_block; /* absolute starting block # of partition */ + uint32_t block_count; /* number of blocks in partition */ + char name[32]; /* partition name */ + char type[32]; /* string type description */ + uint32_t data_start; /* rel block # of first data block */ + uint32_t data_count; /* number of data blocks */ + uint32_t status; /* partition status bits */ + uint32_t boot_start; + uint32_t boot_count; + uint32_t boot_load; + uint32_t boot_load2; + uint32_t boot_entry; + uint32_t boot_entry2; + uint32_t boot_cksum; + char processor[16]; /* Contains 680x0, x=0,2,3,4; or empty */ + uint32_t driver_sig; + char _padding[372]; +}; void @@ -86,9 +235,13 @@ printh(void) printf(FMT, " -h <X>", "Number of default geometry heads"); printf(FMT, " -s <X>", "Number of default geometry sectors"); printf(FMT, " -e --entry", "Specify partition entry number (1-4)"); - printf(FMT, " -o --offset", "Specify partition offset (default 0)"); + printf(FMT, " -o --offset", "Specify partition offset (in 512 byte units, default 0)"); printf(FMT, " -t --type", "Specify partition type (default 0x17)"); printf(FMT, " -i --id", "Specify MBR ID (default random)"); + printf(FMT, " -u --uefi", "Build EFI bootable image"); + printf(FMT, " -m --mac", "Add AFP table support"); + printf(FMT, " --gpt", "Force GPT"); + printf(FMT, " --mbr", "Force MBR"); printf("\n"); printf(FMT, " --forcehd0", "Assume we are loaded as disk ID 0"); @@ -108,6 +261,7 @@ printh(void) int check_option(int argc, char *argv[]) { + char *err = NULL; int n = 0, ind = 0; const char optstr[] = ":h:s:e:o:t:i:fcp?vV"; @@ -117,10 +271,14 @@ check_option(int argc, char *argv[]) { "offset", required_argument, NULL, 'o' }, { "type", required_argument, NULL, 't' }, { "id", required_argument, NULL, 'i' }, + { "gpt", no_argument, NULL, 1001 }, + { "mbr", no_argument, NULL, 1002 }, { "forcehd0", no_argument, NULL, 'f' }, { "ctrlhd0", no_argument, NULL, 'c' }, { "partok", no_argument, NULL, 'p'}, + { "uefi", no_argument, NULL, 'u'}, + { "mac", no_argument, NULL, 'm'}, { "help", no_argument, NULL, '?' }, { "verbose", no_argument, NULL, 'v' }, @@ -135,32 +293,38 @@ check_option(int argc, char *argv[]) switch (n) { case 'h': - if (!sscanf(optarg, "%hu", &head) || head < 1 || head > 256) + head = strtoul(optarg, &err, 0); + if (head < 1 || head > 256) errx(1, "invalid head: `%s', 1 <= head <= 256", optarg); break; case 's': - if (!sscanf(optarg, "%hhu", §or) || sector < 1 || sector > 63) + sector = strtoul(optarg, &err, 0); + if (sector < 1 || sector > 63) errx(1, "invalid sector: `%s', 1 <= sector <= 63", optarg); break; case 'e': - if (!sscanf(optarg, "%hhu", &entry) || entry < 1 || entry > 4) + entry = strtoul(optarg, &err, 0); + if (entry < 1 || entry > 4) errx(1, "invalid entry: `%s', 1 <= entry <= 4", optarg); break; case 'o': - if (!sscanf(optarg, "%hhu", &offset) || offset > 64) - errx(1, "invalid offset: `%s', 0 <= offset <= 64", optarg); + offset = strtoul(optarg, &err, 0); + if (*err) + errx(1, "invalid offset: `%s', 0 <= offset <= 0xFFFFFFFF", optarg); break; case 't': - if (!sscanf(optarg, "%hu", &type) || type > 255) + type = strtoul(optarg, &err, 0); + if (*err || type > 255) errx(1, "invalid type: `%s', 0 <= type <= 255", optarg); break; case 'i': - if (!sscanf(optarg, "%u", &id)) + id = strtoul(optarg, &err, 0); + if (*err) errx(1, "invalid id: `%s'", optarg); break; @@ -176,10 +340,26 @@ check_option(int argc, char *argv[]) partok = 1; break; + case 'u': + mode |= EFI; + break; + + case 'm': + mode |= MAC; + break; + case 'v': mode |= VERBOSE; break; + case 1001: + mode |= MODE_GPT; + break; + + case 1002: + mode |= MODE_MBR; + break; + case 'V': printf("%s version %s\n", prog, VERSION); exit(0); @@ -200,6 +380,33 @@ check_option(int argc, char *argv[]) return optind; } +uint16_t +bendian_short(const uint16_t s) +{ + uint16_t r = 1; + + if (!*(uint8_t *)&r) + return s; + + r = (s & 0x00FF) << 8 | (s & 0xFF00) >> 8; + + return r; +} + + +uint32_t +bendian_int(const uint32_t s) +{ + uint32_t r = 1; + + if (!*(uint8_t *)&r) + return s; + + r = (s & 0x000000FF) << 24 | (s & 0xFF000000) >> 24 + | (s & 0x0000FF00) << 8 | (s & 0x00FF0000) >> 8; + + return r; +} uint16_t lendian_short(const uint16_t s) @@ -229,6 +436,22 @@ lendian_int(const uint32_t s) return r; } +uint64_t +lendian_64(const uint64_t s) +{ + uint64_t r = 1; + + if (*(uint8_t *)&r) + return s; + + r = (s & 0x00000000000000FFull) << 56 | (s & 0xFF00000000000000ull) >> 56 + | (s & 0x000000000000FF00ull) << 40 | (s & 0x00FF000000000000ull) >> 40 + | (s & 0x0000000000FF0000ull) << 24 | (s & 0x0000FF0000000000ull) >> 24 + | (s & 0x00000000FF000000ull) << 8 | (s & 0x000000FF00000000ull) >> 8; + + return r; +} + int check_banner(const uint8_t *buf) @@ -252,7 +475,7 @@ check_banner(const uint8_t *buf) int check_catalogue(const uint8_t *buf) { - int i = 0; + int i, cs; for (i = 0, cs = 0; i < 16; i++) { @@ -307,6 +530,43 @@ read_catalogue(const uint8_t *buf) } +int +read_efi_section(const uint8_t *buf) +{ + unsigned char header_indicator; + unsigned char platform_id; + short count; + + memcpy(&header_indicator, buf++, 1); + memcpy(&platform_id, buf++, 1); + + memcpy(&count, buf, 2); + count = lendian_short(count); + buf += 2; + + if (platform_id == 0xef) + return 0; + + return 1; +} + +int +read_efi_catalogue(const uint8_t *buf, uint32_t *count, uint32_t *lba) +{ + buf += 6; + + memcpy(count, buf, 2); + *count = lendian_short(*count); + buf += 2; + + memcpy(lba, buf, 4); + *lba = lendian_int(*lba); + buf += 6; + + return 0; +} + + void display_catalogue(void) { @@ -321,18 +581,33 @@ display_catalogue(void) } +uint32_t ofs2chs(uint32_t ofs) +{ + unsigned c, h, s; + + s = (ofs % sector) + 1; + h = (ofs / sector) % head; + c = ofs / (sector * head); + if(c > 1023) c = 1023; + + return ((c & 0xff) << 24) + ((s + ((c >> 8) << 6)) << 16) + (h << 8); +} + int initialise_mbr(uint8_t *mbr) { int i = 0; - uint32_t psize = 0, tmp = 0; - uint8_t ptype = 0, *rbm = mbr; - uint8_t bhead = 0, bsect = 0, bcyle = 0; - uint8_t ehead = 0, esect = 0, ecyle = 0; + uint32_t tmp = 0, chs; + uint8_t *rbm = mbr; extern unsigned char isohdpfx[][MBRSIZE]; memcpy(mbr, &isohdpfx[hd0 + 3 * partok], MBRSIZE); + + if (mode & MAC) { + memcpy(mbr, afp_header, sizeof(afp_header)); + } + mbr += MBRSIZE; /* offset 432 */ tmp = lendian_int(de_lba * 4); @@ -351,42 +626,92 @@ initialise_mbr(uint8_t *mbr) mbr[1] = '\0'; mbr += 2; /* offset 446 */ - ptype = type; - psize = c * head * sector - offset; + for (i = 1; i <= 4; i++, mbr += 16) + { + memset(mbr, 0, 16); + + if (!(mode & MODE_MBR)) { + /* write protective mbr */ + if(i == 1 && (mode & MODE_GPT)) { + chs = ofs2chs(1); + mbr[1] = chs >> 8; + mbr[2] = chs >> 16; + mbr[3] = chs >> 24; + mbr[4] = 0xee; + chs = ofs2chs(iso_filesize/512 - 1); + mbr[5] = chs >> 8; + mbr[6] = chs >> 16; + mbr[7] = chs >> 24; + + tmp = lendian_int(1); + memcpy(&mbr[8], &tmp, sizeof(tmp)); - bhead = (offset / sector) % head; - bsect = (offset % sector) + 1; - bcyle = offset / (head * sector); + tmp = lendian_int(iso_filesize/512 - 1); + memcpy(&mbr[12], &tmp, sizeof(tmp)); + } - bsect += (bcyle & 0x300) >> 2; - bcyle &= 0xFF; + continue; + } - ehead = head - 1; - esect = sector + (((cc - 1) & 0x300) >> 2); - ecyle = (cc - 1) & 0xFF; + if (i == 1) + mbr[0] = 0x80; - for (i = 1; i <= 4; i++) - { - memset(mbr, 0, 16); - if (i == entry) + if (i == part_data) { - mbr[0] = 0x80; - mbr[1] = bhead; - mbr[2] = bsect; - mbr[3] = bcyle; - mbr[4] = ptype; - mbr[5] = ehead; - mbr[6] = esect; - mbr[7] = ecyle; + chs = ofs2chs(offset); + mbr[1] = chs >> 8; + mbr[2] = chs >> 16; + mbr[3] = chs >> 24; + chs = ofs2chs(c * head * sector - 1); + mbr[4] = type; + mbr[5] = chs >> 8; + mbr[6] = chs >> 16; + mbr[7] = chs >> 24; tmp = lendian_int(offset); memcpy(&mbr[8], &tmp, sizeof(tmp)); - tmp = lendian_int(psize); + tmp = lendian_int(c * head * sector - offset); + memcpy(&mbr[12], &tmp, sizeof(tmp)); + } + + if (i == part_efi) + { + chs = ofs2chs(efi_lba * 4); + mbr[1] = chs >> 8; + mbr[2] = chs >> 16; + mbr[3] = chs >> 24; + chs = ofs2chs(efi_lba * 4 + efi_count - 1); + mbr[4] = 0xef; + mbr[5] = chs >> 8; + mbr[6] = chs >> 16; + mbr[7] = chs >> 24; + + tmp = lendian_int(efi_lba * 4); + memcpy(&mbr[8], &tmp, sizeof(tmp)); + + tmp = lendian_int(efi_count); + memcpy(&mbr[12], &tmp, sizeof(tmp)); + } + + if (i == part_mac) + { + mbr[1] = 0xfe; + mbr[2] = 0xff; + mbr[3] = 0xff; + mbr[4] = 0x0; + mbr[5] = 0xfe; + mbr[6] = 0xff; + mbr[7] = 0xff; + + tmp = lendian_int(mac_lba * 4); + memcpy(&mbr[8], &tmp, sizeof(tmp)); + + tmp = lendian_int(mac_count); memcpy(&mbr[12], &tmp, sizeof(tmp)); } - mbr += 16; } + mbr[0] = 0x55; mbr[1] = 0xAA; mbr += 2; @@ -394,7 +719,6 @@ initialise_mbr(uint8_t *mbr) return mbr - rbm; } - void display_mbr(const uint8_t *mbr, size_t len) { @@ -424,14 +748,190 @@ display_mbr(const uint8_t *mbr, size_t l } +uint32_t chksum_crc32 (unsigned char *block, unsigned int length) +{ + register unsigned long crc; + unsigned long i; + + crc = 0xFFFFFFFF; + for (i = 0; i < length; i++) + { + crc = ((crc >> 8) & 0x00FFFFFF) ^ crc_tab[(crc ^ *block++) & 0xFF]; + } + return (crc ^ 0xFFFFFFFF); +} + +void +reverse_uuid(uuid_t uuid) +{ + uint8_t t, *p = (uint8_t *)uuid; + + t = p[0]; p[0] = p[3]; p[3] = t; + t = p[1]; p[1] = p[2]; p[2] = t; + t = p[4]; p[4] = p[5]; p[5] = t; + t = p[6]; p[6] = p[7]; p[7] = t; +} + +void +set_gpt_part_name(struct gpt_part_header *part, const char *name) +{ + unsigned u, len = strlen(name); + + if (len > sizeof part->name / sizeof *part->name) + len = sizeof part->name / sizeof *part->name; + + // utf16le, actually + for (u = 0; u < len; u++) + part->name[u] = *name++; +} + +void +initialise_gpt(uint8_t *gpt, uint32_t current, uint32_t alternate, int primary) +{ + struct gpt_header *header = (struct gpt_header *)gpt; + struct gpt_part_header *part; + int hole = 0; + int gptsize = 128 / 4 + 2; + int i; + + if(!(mode & MODE_GPT)) return; + + if (mac_lba) { + /* 2048 bytes per partition, plus round to 2048 boundary */ + hole = (apm_parts * 4) + 2; + } + + if (primary) { + uuid_generate(disk_uuid); + reverse_uuid(disk_uuid); + } + + header->signature = lendian_64(0x5452415020494645ull); + header->revision = lendian_int(0x010000); + header->headerSize = lendian_int(0x5c); + header->currentLBA = lendian_64(current); + header->backupLBA = lendian_64(alternate); + header->firstUsableLBA = lendian_64(gptsize + hole); + header->lastUsableLBA = lendian_64(iso_filesize/512 - gptsize); + if (primary) + header->partitionEntriesLBA = lendian_64(0x02 + hole); + else + header->partitionEntriesLBA = lendian_64(current - (128 / 4)); + header->numParts = lendian_int(0x80); + header->sizeOfPartitionEntries = lendian_int(0x80); + memcpy(header->diskGUID, disk_uuid, sizeof(uuid_t)); + + if (primary) + gpt += sizeof(struct gpt_header) + hole * 512; + else + gpt -= header->sizeOfPartitionEntries * header->numParts; + + part = (struct gpt_part_header *)gpt; + if (primary) { + uuid_generate(part_uuid); + uuid_generate(iso_uuid); + reverse_uuid(part_uuid); + reverse_uuid(iso_uuid); + } + + for(i = 1; i <= 4; i++, part++) { + if(i == part_data) { + memcpy(part->partGUID, iso_uuid, sizeof(uuid_t)); + memcpy(part->partTypeGUID, basic_partition, sizeof(uuid_t)); + part->firstLBA = lendian_64(offset); + part->lastLBA = lendian_64(iso_size/512 - 1); + set_gpt_part_name(part, "ISOHybrid ISO"); + } + + if(i == part_efi) { + memcpy(part->partGUID, part_uuid, sizeof(uuid_t)); + memcpy(part->partTypeGUID, efi_system_partition, sizeof(uuid_t)); + part->firstLBA = lendian_64(efi_lba * 4); + part->lastLBA = lendian_64(part->firstLBA + efi_count - 1); + set_gpt_part_name(part, "ISOHybrid"); + } + + if (i == part_mac) { + memcpy(part->partGUID, part_uuid, sizeof(uuid_t)); + memcpy(part->partTypeGUID, hfs_partition, sizeof(uuid_t)); + part->firstLBA = lendian_64(mac_lba * 4); + part->lastLBA = lendian_64(part->firstLBA + mac_count - 1); + set_gpt_part_name(part, "ISOHybrid"); + } + } + + + header->partitionEntriesCRC = lendian_int (chksum_crc32(gpt, + header->numParts * header->sizeOfPartitionEntries)); + + header->headerCRC = lendian_int(chksum_crc32((uint8_t *)header, + header->headerSize)); +} + +void +initialise_apm(uint8_t *gpt, uint32_t start) +{ + struct apple_part_header *part = (struct apple_part_header *)gpt; + + part->signature = bendian_short(0x504d); + part->map_count = bendian_int(apm_parts); + part->start_block = bendian_int(1); + part->block_count = bendian_int(0x10); + strcpy(part->name, "Apple"); + strcpy(part->type, "Apple_partition_map"); + part->data_start = bendian_int(0); + part->data_count = bendian_int(10); + part->status = bendian_int(0x03); + + part = (struct apple_part_header *)(gpt + 2048); + + part->signature = bendian_short(0x504d); + part->map_count = bendian_int(3); + part->start_block = bendian_int(efi_lba); + part->block_count = bendian_int(efi_count); + strcpy(part->name, "EFI"); + strcpy(part->type, "Apple_HFS"); + part->data_start = bendian_int(0); + part->data_count = bendian_int(efi_count); + part->status = bendian_int(0x33); + + part = (struct apple_part_header *)(gpt + 4096); + + if (mac_lba) + { + part->signature = bendian_short(0x504d); + part->map_count = bendian_int(3); + part->start_block = bendian_int(mac_lba); + part->block_count = bendian_int(mac_count); + strcpy(part->name, "EFI"); + strcpy(part->type, "Apple_HFS"); + part->data_start = bendian_int(0); + part->data_count = bendian_int(mac_count); + part->status = bendian_int(0x33); + } else { + part->signature = bendian_short(0x504d); + part->map_count = bendian_int(3); + part->start_block = bendian_int((start/2048) + 10); + part->block_count = bendian_int(efi_lba - start/2048 - 10); + strcpy(part->name, "ISO"); + strcpy(part->type, "Apple_Free"); + part->data_start = bendian_int(0); + part->data_count = bendian_int(efi_lba - start/2048 - 10); + part->status = bendian_int(0x01); + } +} + int main(int argc, char *argv[]) { int i = 0; FILE *fp = NULL; - struct stat isostat; uint8_t *buf = NULL, *bufz = NULL; - int cylsize = 0, frac = 0, padding = 0; + int cylsize = 0, frac = 0; + unsigned padding = 0; + size_t orig_gpt_size, free_space, gpt_size; + struct iso_primary_descriptor descriptor; + struct stat isostat; prog = strcpy(alloca(strlen(argv[0]) + 1), argv[0]); i = check_option(argc, argv); @@ -443,10 +943,32 @@ main(int argc, char *argv[]) usage(); return 1; } + + if (!(mode & (MODE_MBR | MODE_GPT))) { + mode |= (mode & EFI) ? MODE_GPT : MODE_MBR; + } + + if ((mode & EFI) && !offset) type = 0; + + part_data = 1; + if(mode & EFI) part_efi = 2; + if(mode & MAC) part_mac = 3; + + if(entry) { + if(entry != part_efi && entry != part_mac) part_data = entry; + } + srand(time(NULL) << (getppid() << getpid())); - if (!(fp = fopen(argv[0], "r+"))) + if (!(fp = fopen(argv[0], "r+"))) // ##### err(1, "could not open file `%s'", argv[0]); + + if (fseek(fp, (16 << 11), SEEK_SET)) + err(1, "%s: seek error - 0", argv[0]); + + if (fread(&descriptor, sizeof(char), sizeof(descriptor), fp) != sizeof(descriptor)) + err(1, "%s: read error - 0", argv[0]); + if (fseek(fp, 17 * 2048, SEEK_SET)) err(1, "%s: seek error - 1", argv[0]); @@ -478,6 +1000,53 @@ main(int argc, char *argv[]) if (mode & VERBOSE) display_catalogue(); + buf += 32; + + if (mode & EFI) + { + if (!read_efi_section(buf)) { + buf += 32; + if (!read_efi_catalogue(buf, &efi_count, &efi_lba) && efi_lba) { + if(efi_count < 2) { + unsigned char bpb[512]; + + if (fseek(fp, (efi_lba * 2048), SEEK_SET)) { + err(1, "%s: seek error - 3", argv[0]); + } + + if (fread(bpb, 1, sizeof bpb, fp) != sizeof bpb) { + err(1, "%s", argv[0]); + } + + if((bpb[511] << 8) + bpb[510] == 0xaa55) { + unsigned s = bpb[19] + (bpb[20] << 8); + if(!s) s = bpb[32] + (bpb[33] << 8) + (bpb[34] << 16) + (bpb[35] << 24); + if(s) efi_count = s; + } + } + } else { + errx(1, "%s: invalid efi catalogue", argv[0]); + } + } else { + errx(1, "%s: unable to find efi image", argv[0]); + } + } + + buf += 32; + + if (mode & MAC) + { + if (!read_efi_section(buf)) { + buf += 32; + if (!read_efi_catalogue(buf, &mac_count, &mac_lba) && mac_lba) { + } else { + errx(1, "%s: invalid efi catalogue", argv[0]); + } + } else { + errx(1, "%s: unable to find mac efi image", argv[0]); + } + } + if (fseek(fp, (de_lba * 2048 + 0x40), SEEK_SET)) err(1, "%s: seek error - 3", argv[0]); @@ -491,24 +1060,55 @@ main(int argc, char *argv[]) "signature. Note that isolinux-debug.bin does not support " \ "hybrid booting", argv[0]); + if (offset && efi_lba && offset > efi_lba * 4) + { + part_efi = 1; + part_data = 2; + if (part_mac) + { + part_mac = 2; + part_data = 3; + } + } + if (stat(argv[0], &isostat)) err(1, "%s", argv[0]); + iso_size = (off_t) lendian_int(descriptor.size) * lendian_short(descriptor.block_size); + free_space = isostat.st_size - iso_size; + cylsize = head * sector * 512; frac = isostat.st_size % cylsize; padding = (frac > 0) ? cylsize - frac : 0; if (mode & VERBOSE) - printf("imgsize: %zu, padding: %d\n", (size_t)isostat.st_size, padding); + printf("imgsize: %zu, padding: %d\n", (size_t)iso_filesize, padding); - cc = c = (isostat.st_size + padding) / cylsize; + c = (isostat.st_size + padding) / cylsize; if (c > 1024) { warnx("Warning: more than 1024 cylinders: %d", c); warnx("Not all BIOSes will be able to boot this device"); - cc = 1024; } + /* 512 byte header, 128 entries of 128 bytes */ + orig_gpt_size = gpt_size = 512 + (128 * 128); + + /* Leave space for the APM if necessary */ + if (mac_lba) + gpt_size += (4 * 2048); + + /* + * We need to ensure that we have enough space for the secondary GPT. + * Unlike the primary, this doesn't need a hole for the APM. We still + * want to be 1MB aligned so just bump the padding by a megabyte. + */ + if ((mode & MODE_GPT) && free_space < orig_gpt_size && padding < orig_gpt_size) { + padding += 1024 * 1024; + } + + iso_filesize = isostat.st_size + padding; + if (!id) { if (fseek(fp, 440, SEEK_SET)) @@ -530,6 +1130,16 @@ main(int argc, char *argv[]) buf = bufz; memset(buf, 0, BUFSIZE); + + if (fseek(fp, 0, SEEK_SET)) + err(1, "%s: seek error - 5", argv[0]); + + /* clean up first 16 blocks */ + for (i = 0; i < 16; i++) { + if (fwrite(buf, sizeof(char), BUFSIZE, fp) != BUFSIZE) + err(1, "%s: write error - 1", argv[0]); + } + i = initialise_mbr(buf); if (mode & VERBOSE) @@ -541,15 +1151,74 @@ main(int argc, char *argv[]) if (fwrite(buf, sizeof(char), i, fp) != (size_t)i) err(1, "%s: write error - 1", argv[0]); + if (mode & MODE_GPT) { + /* always write primary gpt, if only to cleanup old data */ + reverse_uuid(efi_system_partition); + reverse_uuid(basic_partition); + reverse_uuid(hfs_partition); + + buf = calloc(gpt_size, sizeof(char)); + memset(buf, 0, gpt_size); + + /* + * Primary GPT starts at sector 1, secondary GPT starts at 1 sector + * before the end of the image + */ + initialise_gpt(buf, 1, iso_filesize / 512 - 1, 1); + + if (fseek(fp, 512, SEEK_SET)) + err(1, "%s: seek error - 6", argv[0]); + + if (fwrite(buf, sizeof(char), gpt_size, fp) != (size_t)gpt_size) + err(1, "%s: write error - 2", argv[0]); + } + + if (mac_lba) + { + /* Apple partition entries filling 2048 bytes each */ + int apm_size = apm_parts * 2048; + + buf = realloc(buf, apm_size); + memset(buf, 0, apm_size); + + initialise_apm(buf, APM_OFFSET); + + fseek(fp, APM_OFFSET, SEEK_SET); + fwrite(buf, sizeof(char), apm_size, fp); + } + if (padding) { if (fsync(fileno(fp))) err(1, "%s: could not synchronise", argv[0]); - if (ftruncate(fileno(fp), isostat.st_size + padding)) + if (ftruncate(fileno(fp), iso_filesize)) err(1, "%s: could not add padding bytes", argv[0]); } + if (mode & MODE_GPT) { + buf = realloc(buf, orig_gpt_size); + memset(buf, 0, orig_gpt_size); + + buf += orig_gpt_size - sizeof(struct gpt_header); + + initialise_gpt(buf, iso_filesize / 512 - 1, 1, 0); + + /* Shift back far enough to write the 128 GPT entries */ + buf -= 128 * sizeof(struct gpt_part_header); + + /* + * Seek far enough back that the gpt header is 512 bytes before the + * end of the image + */ + + if (fseek(fp, iso_filesize - orig_gpt_size, SEEK_SET)) + err(1, "%s: seek error - 8", argv[0]); + + if (fwrite(buf, sizeof(char), orig_gpt_size, fp) != orig_gpt_size) + err(1, "%s: write error - 4", argv[0]); + } + free(buf); fclose(fp); Index: syslinux-4.04/utils/isohybrid.h =================================================================== --- syslinux-4.04.orig/utils/isohybrid.h +++ syslinux-4.04/utils/isohybrid.h @@ -20,7 +20,7 @@ * */ -#define VERSION "0.11" +#define VERSION "0.12.1" #define BUFSIZE 2048 #define MBRSIZE 432
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