:: commit 0ea9b039add207a540f1fc232670937bb63e130f
host/limine: Drop support for non-standard GPT-embedding
diff --git a/host/limine.c b/host/limine.c
index 1599f1d1..11dc19ff 100644
--- a/host/limine.c
+++ b/host/limine.c
@@ -113,53 +113,6 @@ struct gpt_entry {
uint16_t partition_name[36];
};
-// This table from https://web.mit.edu/freebsd/head/sys/libkern/crc32.c
-static const uint32_t crc32_table[] = {
- 0x00000000, 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 gpt2mbr_type_conv {
uint64_t gpt_type1;
uint64_t gpt_type2;
@@ -208,18 +161,6 @@ lba_too_big:
chs[2] = cylinder; // low 8 bits
}
-static uint32_t crc32(void *_stream, size_t len) {
- uint8_t *stream = _stream;
- uint32_t ret = 0xffffffff;
-
- for (size_t i = 0; i < len; i++) {
- ret = (ret >> 8) ^ crc32_table[(ret ^ stream[i]) & 0xff];
- }
-
- ret ^= 0xffffffff;
- return ret;
-}
-
static uint16_t endswap16(uint16_t value) {
uint16_t ret = 0;
ret |= (value >> 8) & 0x00ff;
@@ -1089,7 +1030,7 @@ part_too_low:
}
if (!quiet) {
- fprintf(stderr, "GPT partition specified. Installing there instead of embedding.\n");
+ fprintf(stderr, "Installing BIOS boot code to partition %s.\n", part_ndx);
}
stage2_loc_a = ENDSWAP(gpt_entry.starting_lba) * lb_size;
@@ -1097,97 +1038,8 @@ part_too_low:
if (stage2_loc_b & (lb_size - 1))
stage2_loc_b = (stage2_loc_b + lb_size) & ~(lb_size - 1);
} else {
- if (!quiet) {
- fprintf(stderr, "GPT partition NOT specified. Attempting GPT embedding.\n");
- }
-
- int64_t max_partition_entry_used = -1;
- for (int64_t i = 0; i < (int64_t)ENDSWAP(gpt_header.number_of_partition_entries); i++) {
- struct gpt_entry gpt_entry;
- device_read(&gpt_entry,
- (ENDSWAP(gpt_header.partition_entry_lba) * lb_size)
- + (i * ENDSWAP(gpt_header.size_of_partition_entry)),
- sizeof(struct gpt_entry));
-
- if (gpt_entry.unique_partition_guid[0] != 0 ||
- gpt_entry.unique_partition_guid[1] != 0) {
- if (i > max_partition_entry_used)
- max_partition_entry_used = i;
- }
- }
-
- stage2_loc_a = (ENDSWAP(gpt_header.partition_entry_lba) + 32) * lb_size;
- stage2_loc_a -= stage2_size_a;
- stage2_loc_a &= ~(lb_size - 1);
- stage2_loc_b = (ENDSWAP(secondary_gpt_header.partition_entry_lba) + 32) * lb_size;
- stage2_loc_b -= stage2_size_b;
- stage2_loc_b &= ~(lb_size - 1);
-
- size_t partition_entries_per_lb =
- lb_size / ENDSWAP(gpt_header.size_of_partition_entry);
- size_t new_partition_array_lba_size =
- stage2_loc_a / lb_size - ENDSWAP(gpt_header.partition_entry_lba);
- size_t new_partition_entry_count =
- new_partition_array_lba_size * partition_entries_per_lb;
-
- if ((int64_t)new_partition_entry_count <= max_partition_entry_used) {
- fprintf(stderr, "%s: error: Cannot embed because there are too many used partition entries.\n", program_name);
- goto cleanup;
- }
-
- if (!quiet) {
- fprintf(stderr, "New maximum count of partition entries: %zu.\n", new_partition_entry_count);
- }
-
- // Zero out unused partitions
- void *empty = calloc(1, ENDSWAP(gpt_header.size_of_partition_entry));
- for (size_t i = max_partition_entry_used + 1; i < new_partition_entry_count; i++) {
- device_write(empty,
- ENDSWAP(gpt_header.partition_entry_lba) * lb_size + i * ENDSWAP(gpt_header.size_of_partition_entry),
- ENDSWAP(gpt_header.size_of_partition_entry));
- }
- for (size_t i = max_partition_entry_used + 1; i < new_partition_entry_count; i++) {
- device_write(empty,
- ENDSWAP(secondary_gpt_header.partition_entry_lba) * lb_size + i * ENDSWAP(secondary_gpt_header.size_of_partition_entry),
- ENDSWAP(secondary_gpt_header.size_of_partition_entry));
- }
- free(empty);
-
- uint8_t *partition_array =
- malloc(new_partition_entry_count * ENDSWAP(gpt_header.size_of_partition_entry));
- if (partition_array == NULL) {
- perror_wrap("error: bios_install(): malloc()");
- goto cleanup;
- }
-
- device_read(partition_array,
- ENDSWAP(gpt_header.partition_entry_lba) * lb_size,
- new_partition_entry_count * ENDSWAP(gpt_header.size_of_partition_entry));
-
- uint32_t crc32_partition_array =
- crc32(partition_array,
- new_partition_entry_count * ENDSWAP(gpt_header.size_of_partition_entry));
-
- free(partition_array);
-
- gpt_header.partition_entry_array_crc32 = ENDSWAP(crc32_partition_array);
- gpt_header.number_of_partition_entries = ENDSWAP(new_partition_entry_count);
- gpt_header.crc32 = 0;
- gpt_header.crc32 = crc32(&gpt_header, 92);
- gpt_header.crc32 = ENDSWAP(gpt_header.crc32);
- device_write(&gpt_header,
- lb_size,
- sizeof(struct gpt_table_header));
-
- secondary_gpt_header.partition_entry_array_crc32 = ENDSWAP(crc32_partition_array);
- secondary_gpt_header.number_of_partition_entries =
- ENDSWAP(new_partition_entry_count);
- secondary_gpt_header.crc32 = 0;
- secondary_gpt_header.crc32 = crc32(&secondary_gpt_header, 92);
- secondary_gpt_header.crc32 = ENDSWAP(secondary_gpt_header.crc32);
- device_write(&secondary_gpt_header,
- lb_size * ENDSWAP(gpt_header.alternate_lba),
- sizeof(struct gpt_table_header));
+ fprintf(stderr, "%s: error: Installing to a GPT device, but no BIOS boot partition specified.\n", program_name);
+ goto cleanup;
}
} else {
if (!quiet) {
