New system area type 2 for Little Endian MIPS DEC boot block.
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a75fb9a894
@ -16,13 +16,17 @@ specifications, some is just rumor which happens to work (maybe not even that).
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EL Torito CD booting, for PC-BIOS x86, PowerPC, (old) Mac, EFI.
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MBR, for PC-BIOS x86 from (pseudo-) hard disk
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- SYSLINUX Isohybrid MBR
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- SYSLINUX isohybrid MBR
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- GRUB2 grub-mkrescue MBR.
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MIPS Volume Header, for MIPS Big Endian, e.g. SGI Indigo2.
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DEC Boot Block, for MIPS Little Endian , e.g. DECstation.
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------------------------------------------------------------------------------
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EL Torito CD booting
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for PC-BIOS x86, PowerPC, (old) Mac, EFI
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@ -239,9 +243,9 @@ Byte Range | Value | Meaning
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24 - 63 | 0 | Reserved
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---------- | ---------- | ----------------------------------------------------
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------------------------------------------------------------------------------
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MBR
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for PC-BIOS x86 from (pseudo-) hard disk
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@ -480,7 +484,9 @@ Cleartext part:
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------------------------------------------------------------------------------
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MIPSEL Little Endian MIPS , e.g. DECstation
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DEC Boot Block
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for MIPS Little Endian , e.g. DECstation
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Sources:
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cdrkit-1.1.10/genisoimage/boot-mipsel.c
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@ -495,6 +501,7 @@ Sources:
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There seems to be only one boot file possible.
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Some information needs to be read out of the ELF headers of this boot file.
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Byte Range | Value | Meaning
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---------- | ---------- | ----------------------------------------------------
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@ -514,12 +521,13 @@ Byte Range | Value | Meaning
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| |
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24 - 31 | ========== | Boot Map Entry 1
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| |
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24 - 27 | count | Segment size in file.
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24 - 27 | seg_size | Segment size in file. Blocks of 512 bytes.
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| | Stems from ELF header of boot file.
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| | (Elf32_Phdr field p_filesz + 511) / 512;
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| |
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28 - 31 | start | Segment file offset
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| | Stems from ELF header of boot file.
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28 - 31 | seg_start | Segment file offset. Blocks 512 bytes.
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| | ISO 9660 LBA of boot file * 4 plus offset
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| | + offset which stems from ELF header of boot file:
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| | (Elf32_Phdr field p_offset + 511) / 512;
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| |
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32 - 431 | ========== | Boot Map Entries 2 to 51
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@ -547,15 +555,15 @@ Byte Range | Value | Meaning
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0 - 3 | | ( Segment type )
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| |
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4 - 7 | p_offset | /* Segment file offset */
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| -> start | Needed for start
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|-> seg_start| Needed for seg_start
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| |
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8 - 11 | p_vaddr | /* Segment virtual address */
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=load_address| Needed for load_address
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| =load_adr | Needed for load_adr
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| |
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12 - 15 | | (Segment physical address)
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| |
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16 - 19 | p_filesz | /* Segment size in file */
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| -> count | Needed for count
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|-> seg_size | Needed for seg_size
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| |
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@ -1775,6 +1775,11 @@ int iso_write_opts_set_fifo_size(IsoWriteOpts *opts, size_t fifo_size);
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* iso_image_add_mips_boot_file().
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* This will overwrite the first 512 bytes of the submitted
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* data.
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* 2= DEC Boot Block for MIPS Little Endian
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* The first boot file submitted by
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* iso_image_add_mips_boot_file() will be activated.
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* This will overwrite the first 512 bytes of the submitted
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* data.
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* @param flag
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* bit0 = invalidate any attached system area data. Same as data == NULL
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* (This re-activates eventually loaded image System Area data.
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@ -2970,9 +2975,13 @@ int iso_image_get_system_area(IsoImage *img, char data[32768],
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int *options, int flag);
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/**
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* Add a MIPS Big Endian boot file path to the image. Up to 15 such files can
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* be written into a MIPS Big Endian Volume Header if this is enabled by
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* value 1 in iso_write_opts_set_system_area() option bits 2 to 7.
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* Add a MIPS boot file path to the image.
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* Up to 15 such files can be written into a MIPS Big Endian Volume Header
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* if this is enabled by value 1 in iso_write_opts_set_system_area() option
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* bits 2 to 7.
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* A single file can be written into a DEC Boot Block if this is enabled by
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* value 2 in iso_write_opts_set_system_area() option bits 2 to 7. So only
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* the first added file gets into effect with this system area type.
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* The data files which shall serve as MIPS boot files have to be brought into
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* the image by the normal means.
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* @param img
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@ -6315,8 +6324,8 @@ int iso_md5_match(char first_md5[16], char second_md5[16]);
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/** Too many MIPS Big Endian boot files given (max. 15) (FAILURE, HIGH, -365)*/
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#define ISO_BOOT_TOO_MANY_MIPS 0xE830FE91
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/** MIPS Big Endian boot file missing in image (MISHAP, HIGH, -364) */
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#define ISO_BOOT_MIPS_MISSING 0xE430FE90
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/** Boot file missing in image (MISHAP, HIGH, -364) */
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#define ISO_BOOT_FILE_MISSING 0xE430FE90
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@ -352,8 +352,8 @@ const char *iso_error_to_msg(int errcode)
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return "Failed to process file for Jigdo Template Extraction";
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case ISO_BOOT_TOO_MANY_MIPS:
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return "Too many MIPS Big Endian boot files given (max. 15)";
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case ISO_BOOT_MIPS_MISSING:
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return "MIPS Big Endian boot file missing in image";
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case ISO_BOOT_FILE_MISSING:
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return "Boot file missing in image";
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default:
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return "Unknown error";
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}
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@ -212,6 +212,41 @@ int iso_offset_partition_start(uint32_t img_blocks, uint32_t partition_offset,
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}
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static int boot_nodes_from_iso_path(Ecma119Image *t, char *path,
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IsoNode **iso_node, Ecma119Node **ecma_node,
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char *purpose, int flag)
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{
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int ret;
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ret = iso_tree_path_to_node(t->image, path, iso_node);
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if (ret < 0) {
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iso_msg_submit(t->image->id, ISO_BOOT_FILE_MISSING, 0,
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"Cannot find %s '%s'", purpose, path);
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return ISO_BOOT_FILE_MISSING;
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}
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if ((*iso_node)->type != LIBISO_FILE) {
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iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
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"Designated boot file is not a data file: '%s'", path);
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return ISO_BOOT_IMAGE_NOT_VALID;
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}
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*ecma_node= ecma119_search_iso_node(t, *iso_node);
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if (*ecma_node == NULL) {
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iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
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"Program error: IsoFile has no Ecma119Node: '%s'", path);
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return ISO_ASSERT_FAILURE;
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} else {
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if ((*ecma_node)->type != ECMA119_FILE) {
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iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
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"Program error: Ecma119Node of IsoFile is no ECMA119_FILE: '%s'",
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path);
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return ISO_ASSERT_FAILURE;
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}
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}
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return ISO_SUCCESS;
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}
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/* This function was implemented according to doc/boot_sectors.txt section
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"MIPS Volume Header" which was derived by Thomas Schmitt from
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cdrkit-1.1.10/genisoimage/boot-mips.c by Steve McIntyre which is based
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@ -273,13 +308,27 @@ static int make_mips_volume_header(Ecma119Image *t, uint8_t *buf, int flag)
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#ifdef Libisofs_mips_boot_file_pathS
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for (idx = 0; idx < t->image->num_mips_boot_files; idx++) {
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#ifndef NIX
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ret = boot_nodes_from_iso_path(t, t->image->mips_boot_file_paths[idx],
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&node, &ecma_node, "MIPS boot file", 0);
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if (ret < 0)
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return ret;
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namept = (char *) iso_node_get_name(node);
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name_field = (char *) (buf + (72 + 16 * idx));
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strncpy(name_field, namept, 8);
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#else /* ! NIX */
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ret = iso_tree_path_to_node(t->image,
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t->image->mips_boot_file_paths[idx], &node);
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if (ret < 0) {
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iso_msg_submit(t->image->id, ISO_BOOT_MIPS_MISSING, 0,
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iso_msg_submit(t->image->id, ISO_BOOT_FILE_MISSING, 0,
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"Cannot find MIPS boot file '%s'",
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t->image->mips_boot_file_paths[idx]);
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return ISO_BOOT_MIPS_MISSING;
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return ISO_BOOT_FILE_MISSING;
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}
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if (node->type != LIBISO_FILE) {
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iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
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@ -306,6 +355,10 @@ static int make_mips_volume_header(Ecma119Image *t, uint8_t *buf, int flag)
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t->image->mips_boot_file_paths[idx]);
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return ISO_ASSERT_FAILURE;
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}
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#endif /* NIX */
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file_lba = ecma_node->info.file->sections[0].block;
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iso_msb(buf + (72 + 16 * idx) + 8, file_lba * 4, 4);
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@ -365,7 +418,129 @@ static int make_mips_volume_header(Ecma119Image *t, uint8_t *buf, int flag)
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}
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iso_msb(buf + 504, checksum, 4);
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return 1;
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return ISO_SUCCESS;
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}
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/* This function was implemented according to doc/boot_sectors.txt section
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"MIPS Little Endian" which was derived by Thomas Schmitt from
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cdrkit-1.1.10/genisoimage/boot-mipsel.c by Steve McIntyre which is based
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on work of Florian Lohoff and Thiemo Seufer, and from <elf.h> by Free
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Software Foundation, Inc.
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This function itself is entirely under copyright (C) 2010 Thomas Schmitt.
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*/
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static int make_mipsel_volume_header(Ecma119Image *t, uint8_t *buf, int flag)
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{
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uint32_t load_adr, exec_adr, seg_size, seg_start, p_offset, p_filesz;
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uint32_t phdr_adr;
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off_t image_size;
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int ret;
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uint8_t elf_buf[32];
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char *path = NULL;
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IsoNode *iso_node;
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Ecma119Node *ecma_node;
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IsoStream *stream;
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FILE *fp = NULL;
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/* Bytes 512 to 32767 may come from image or external file */
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memset(buf, 0, 512);
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/* <<< Unused. No partition table or such ? */
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image_size = t->curblock * 2048;
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if (t->image->num_mips_boot_files <= 0)
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return ISO_SUCCESS; /* There seems to be no partition table */
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ret = boot_nodes_from_iso_path(t, t->image->mips_boot_file_paths[0],
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&iso_node, &ecma_node, "MIPS boot file", 0);
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if (ret < 0)
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return ret;
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stream = iso_file_get_stream((IsoFile *) iso_node);
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/* <<< This does not work for boot file in old session */
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/* >>> Replace by iso_stream_open(), iso_stream_read() which has to be
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done earlier, or system area production must happen before
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iso_image_create_burn_source() ends.
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*/
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path= iso_stream_get_source_path(stream, 0);
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if (path == NULL) {
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iso_msg_submit(t->image->id, ISO_ASSERT_FAILURE, 0,
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"Cannot determine disk path of designated MIPS boot file: '%s'",
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t->image->mips_boot_file_paths[0]);
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return ISO_ASSERT_FAILURE;
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}
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fp = fopen(path, "r");
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if (fp == NULL) {
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cannot_read:;
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iso_msg_submit(t->image->id, ISO_FILE_ERROR, 0,
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"Cannot open designated MIPS boot file: '%s'",
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path[0]);
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if (fp != NULL)
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fclose(fp);
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free(path);
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return ISO_FILE_ERROR;
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}
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free(path);
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path = NULL;
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/* Read necessary ELF info */
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ret = fread(elf_buf, 32, 1, fp);
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if (ret != 1)
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goto cannot_read;
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/* 24 - 27 | e_entry | Entry point virtual address */
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exec_adr = iso_read_lsb(elf_buf + 24, 4);
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/* 28 - 31 | e_phoff | Program header table file offset */
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phdr_adr = iso_read_lsb(elf_buf + 28, 4);
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/* <<< This does not work for boot file in old session */
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/* >>> replace by skip-reading of stream data */
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ret = fseek(fp, (long) phdr_adr, SEEK_SET);
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if (ret != 1)
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goto cannot_read;
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ret = fread(elf_buf, 20, 1, fp);
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if (ret != 1)
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goto cannot_read;
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/* 4 - 7 | p_offset | Segment file offset */
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p_offset = iso_read_lsb(elf_buf + 4, 4);
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/* 8 - 11 | p_vaddr | Segment virtual address */
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load_adr = iso_read_lsb(elf_buf + 8, 4);
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/* 16 - 19 | p_filesz | Segment size in file */
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p_filesz = iso_read_lsb(elf_buf + 16, 4);
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fclose(fp);
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fp = NULL;
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/* Write DEC Bootblock */
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/* 8 - 11 | 0x0002757a | Magic number */
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iso_lsb(buf + 8, 0x0002757a, 4);
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/* 12 - 15 | 1 | Mode 1: Multi extent boot */
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iso_lsb(buf + 12, 1, 4);
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/* 16 - 19 | load_adr | Load address */
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iso_lsb(buf + 16, load_adr, 4);
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/* 20 - 23 | exec_adr | Execution address */
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iso_lsb(buf + 20, exec_adr, 4);
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/* 24 - 27 | seg_size | Segment size in file. */
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seg_size = (p_filesz + 511) / 512;
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iso_lsb(buf + 24, seg_size, 4);
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/* 28 - 31 | seg_start | Segment file offset */
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seg_start = ecma_node->info.file->sections[0].block * 4
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+ (p_offset + 511) / 512;
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iso_lsb(buf + 28, seg_start, 4);
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return ISO_SUCCESS;
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}
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@ -426,6 +601,10 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
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ret = make_mips_volume_header(t, buf, 0);
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if (ret != ISO_SUCCESS)
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return ret;
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} else if(sa_type == 2) {
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ret = make_mipsel_volume_header(t, buf, 0);
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if (ret != ISO_SUCCESS)
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return ret;
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} else if(t->partition_offset > 0 && sa_type == 0) {
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/* Write a simple partition table. */
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ret = make_grub_msdos_label(img_blocks, buf, 2);
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