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syslinux/syslinux-4.04-isohybrid_efi.diff

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- update isohybrid and mbr & gpt boot code with versions from syslinux-5.00 - fix gpt code in isohybrid and adjust to create a valid partition table for our new media layout OBS-URL: https://build.opensuse.org/package/show/system:install:head/syslinux?expand=0&rev=44
2013-02-04 14:30:17 +01:00
--- mbr/altmbr.S
+++ mbr/altmbr.S
@@ -204,7 +204,7 @@
5:
decb (partition)
jz boot
- addw $16, %bx
+ addw $16, %si
loopw 5b
popw %cx /* %cx <- 4 */
--- mbr/isohdpfx.S
+++ mbr/isohdpfx.S
@@ -66,6 +66,37 @@
.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
--- mbr/mbr.S
+++ mbr/mbr.S
@@ -265,6 +265,19 @@
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 */
--- utils/Makefile
+++ utils/Makefile
@@ -47,7 +47,7 @@
$(PERL) isohdpfxarray.pl $(ISOHDPFX) > $@
isohybrid: isohybrid.o isohdpfx.o
- $(CC) $(LDFLAGS) -o $@ $^
+ $(CC) $(LDFLAGS) -o $@ $^ -luuid
gethostip: gethostip.o
$(CC) $(LDFLAGS) -o $@ $^
--- utils/isohybrid.c
+++ 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 @@
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 @@
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 @@
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 @@
{ "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 @@
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", &sector) || 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 @@
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 @@
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 @@
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 @@
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 @@
}
+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 @@
}
+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 @@
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 @@
return mbr - rbm;
}
-
void
display_mbr(const uint8_t *mbr, size_t len)
{
@@ -424,14 +748,190 @@
}
+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 @@
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 @@
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 @@
"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 @@
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 @@
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);
--- utils/isohybrid.h
+++ utils/isohybrid.h
@@ -20,7 +20,7 @@
*
*/
-#define VERSION "0.11"
+#define VERSION "0.12.1"
#define BUFSIZE 2048
#define MBRSIZE 432
Reference in New Issue Copy Permalink