New option bits with el_torito_set_isolinux_options() and
iso_write_opts_set_system_area() to control GRUB2 patching of boot image and MBR
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eb6503a8ad
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@ -3275,7 +3275,7 @@ int iso_write_opts_set_system_area(IsoWriteOpts *opts, char data[32768],
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memcpy(opts->system_area_data, data, 32768);
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}
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if (!(flag & 4))
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opts->system_area_options = options & 0x3fff;
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opts->system_area_options = options & 0x7fff;
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return ISO_SUCCESS;
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}
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2007 Vreixo Formoso
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* Copyright (c) 2010 Thomas Schmitt
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* Copyright (c) 2010 - 2013 Thomas Schmitt
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*
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* This file is part of the libisofs project; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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@ -160,7 +160,13 @@ int el_torito_get_selection_crit(ElToritoBootImage *bootimg, uint8_t crit[20])
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/* API */
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int el_torito_seems_boot_info_table(ElToritoBootImage *bootimg, int flag)
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{
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switch (flag & 15) {
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case 0:
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return bootimg->seems_boot_info_table;
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case 1:
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return bootimg->seems_grub2_boot_info;
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}
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return 0;
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}
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/**
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@ -197,14 +203,14 @@ void el_torito_patch_isolinux_image(ElToritoBootImage *bootimg)
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*/
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int el_torito_set_isolinux_options(ElToritoBootImage *bootimg, int options, int flag)
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{
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bootimg->isolinux_options = (options & 0x01ff);
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bootimg->isolinux_options = (options & 0x03ff);
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return ISO_SUCCESS;
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}
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/* API */
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int el_torito_get_isolinux_options(ElToritoBootImage *bootimg, int flag)
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{
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return bootimg->isolinux_options & 0x01ff;
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return bootimg->isolinux_options & 0x03ff;
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}
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/* API */
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@ -1096,7 +1102,7 @@ int make_boot_info_table(uint8_t *buf, uint32_t pvd_lba,
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}
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/**
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* Patch an isolinux boot image.
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* Patch an El Torito boot image by a boot info table.
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*
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* @return
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* 1 on success, 0 error (but continue), < 0 error
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@ -1117,6 +1123,27 @@ int patch_boot_info_table(uint8_t *buf, Ecma119Image *t,
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return ret;
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}
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/**
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* Patch a GRUB2 El Torito boot image.
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*/
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static
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int patch_grub2_boot_image(uint8_t *buf, Ecma119Image *t,
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size_t imgsize, int idx,
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size_t pos, int offst)
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{
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uint64_t blk;
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if (imgsize < pos + 8)
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return iso_msg_submit(t->image->id, ISO_ISOLINUX_CANT_PATCH, 0,
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"Isolinux image too small for GRUB2. Will not patch it.");
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blk = ((uint64_t) t->bootsrc[idx]->sections[0].block) * 4 + offst;
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iso_lsb((buf + pos), blk & 0xffffffff, 4);
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iso_lsb((buf + pos + 4), blk >> 32, 4);
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return ISO_SUCCESS;
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}
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/* Patch the boot images if indicated */
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int iso_patch_eltoritos(Ecma119Image *t)
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{
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@ -1130,7 +1157,7 @@ int iso_patch_eltoritos(Ecma119Image *t)
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return ISO_SUCCESS;
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for (idx = 0; idx < t->catalog->num_bootimages; idx++) {
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if (!(t->catalog->bootimages[idx]->isolinux_options & 0x01))
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if (!(t->catalog->bootimages[idx]->isolinux_options & 0x201))
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continue;
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original = t->bootsrc[idx]->stream;
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size = (size_t) iso_stream_get_size(original);
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@ -1154,8 +1181,19 @@ int iso_patch_eltoritos(Ecma119Image *t)
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}
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/* ok, patch the read buffer */
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if (t->catalog->bootimages[idx]->isolinux_options & 0x200) {
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/* GRUB2 boot provisions */
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ret = patch_grub2_boot_image(buf, t, size, idx,
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Libisofs_grub2_elto_patch_poS,
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Libisofs_grub2_elto_patch_offsT);
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if (ret < 0)
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return ret;
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}
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/* Must be done as last patching */
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if (t->catalog->bootimages[idx]->isolinux_options & 0x01) {
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/* Boot Info Table */
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ret = patch_boot_info_table(buf, t, size, idx);
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if (ret < 0) {
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if (ret < 0)
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return ret;
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}
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@ -58,6 +58,7 @@ struct el_torito_boot_image {
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* Whether the boot image seems to contain a boot_info_table
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*/
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unsigned int seems_boot_info_table:1;
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unsigned int seems_grub2_boot_info:1;
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/**
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* isolinux options
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* bit 0 -> whether to patch image
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@ -155,4 +156,12 @@ int make_boot_info_table(uint8_t *buf, uint32_t pvd_lba,
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*/
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int iso_patch_eltoritos(Ecma119Image *t);
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/* Parameters for patch_grub2_boot_image()
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Might later become variables in struct el_torito_boot_image.
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*/
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#define Libisofs_grub2_elto_patch_poS (512 * 5 - 12)
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#define Libisofs_grub2_elto_patch_offsT 5
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#endif /* LIBISO_ELTORITO_H */
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@ -3375,13 +3375,14 @@ static
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int iso_image_eval_boot_info_table(IsoImage *image, struct iso_read_opts *opts,
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IsoDataSource *src, uint32_t iso_image_size, int flag)
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{
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int i, ret, section_count, todo, chunk;
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int i, j, ret, section_count, todo, chunk;
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uint32_t img_lba, img_size, boot_pvd_found, image_pvd, alleged_size;
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struct iso_file_section *sections = NULL;
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struct el_torito_boot_image *boot;
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uint8_t *boot_image_buf = NULL, boot_info_found[16], *buf = NULL;
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IsoStream *stream = NULL;
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IsoFile *boot_file;
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uint64_t blk;
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if (image->bootcat == NULL)
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{ret = ISO_SUCCESS; goto ex;}
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@ -3390,6 +3391,7 @@ int iso_image_eval_boot_info_table(IsoImage *image, struct iso_read_opts *opts,
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boot = image->bootcat->bootimages[i];
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boot_file = boot->image;
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boot->seems_boot_info_table = 0;
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boot->seems_grub2_boot_info = 0;
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img_size = iso_file_get_size(boot_file);
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if (img_size > Libisofs_boot_image_max_sizE || img_size < 64)
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continue;
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@ -3455,6 +3457,16 @@ int iso_image_eval_boot_info_table(IsoImage *image, struct iso_read_opts *opts,
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goto ex;
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if (memcmp(boot_image_buf + 8, boot_info_found, 16) == 0)
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boot->seems_boot_info_table = 1;
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if (img_size >= Libisofs_grub2_elto_patch_poS + 8) {
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blk = 0;
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for (j = Libisofs_grub2_elto_patch_poS + 7;
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j >= Libisofs_grub2_elto_patch_poS; j--)
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blk = (blk << 8) | boot_image_buf[j];
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if (blk == img_lba * 4 + Libisofs_grub2_elto_patch_offsT)
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boot->seems_grub2_boot_info = 1;
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}
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free(boot_image_buf);
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boot_image_buf = NULL;
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}
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@ -2191,6 +2191,13 @@ int iso_write_opts_set_fifo_size(IsoWriteOpts *opts, size_t fifo_size);
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* 1 = CHRP: A single MBR partition of type 0x96 covers the
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* ISO image. Not compatible with any other feature
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* which needs to have own MBR partition entries.
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* bit14= Only with System area type 0 = MBR
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* GRUB2 boot provisions:
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* @since 1.3.0
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* Patch system area at byte 92 to 99 with 512-block address + 1
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* of the first boot image file. Little-endian 8-byte.
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* Should be combined with options bit0.
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* Will not be in effect if options bit1 is set.
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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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@ -3465,9 +3472,15 @@ int el_torito_get_selection_crit(ElToritoBootImage *bootimg, uint8_t crit[20]);
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* @param bootimg
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* The image to inquire
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* @param flag
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* Reserved for future usage, set to 0.
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* Bitfield for control purposes:
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* bit0 - bit3= mode
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* 0 = inquire for classic boot info table as described in man mkisofs
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* @since 0.6.32
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* 1 = inquire for GRUB2 boot info as of bit9 of options of
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* el_torito_set_isolinux_options()
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* @since 1.3.0
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* @return
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* 1 = seems to contain oot info table , 0 = quite surely not
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* 1 = seems to contain the inquired boot info, 0 = quite surely not
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* @since 0.6.32
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*/
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int el_torito_seems_boot_info_table(ElToritoBootImage *bootimg, int flag);
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@ -3531,6 +3544,11 @@ int el_torito_seems_boot_info_table(ElToritoBootImage *bootimg, int flag);
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* mentioned. The ISOLINUX MBR must look suitable or else an error
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* event will happen at image generation time.
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* @since 1.2.4
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* bit9= GRUB2 boot info
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* Patch the boot image file at byte 1012 with the 512-block
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* address + 2. Two little endian 32-bit words. Low word first.
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* This is combinable with bit0.
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* @since 1.3.0
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* @param flag
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* Reserved for future usage, set to 0.
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* @return
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2008 Vreixo Formoso
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* Copyright (c) 2010 - 2012 Thomas Schmitt
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* Copyright (c) 2010 - 2013 Thomas Schmitt
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*
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* This file is part of the libisofs project; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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@ -1417,6 +1417,8 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
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int first_partition = 1, last_partition = 4, apm_flag, part_type;
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int gpt_count = 0, gpt_idx[128], apm_count = 0;
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uint32_t img_blocks;
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uint64_t blk;
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uint8_t *wpt;
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if ((t == NULL) || (buf == NULL)) {
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return ISO_NULL_POINTER;
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@ -1607,6 +1609,15 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
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return ret;
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}
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if (sa_type == 0 && (t->system_area_options & 0x4000) && !do_isohybrid) {
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/* Patch MBR for GRUB2 */
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blk = t->bootsrc[0]->sections[0].block * 4 +
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Libisofs_grub2_mbr_patch_offsT;
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wpt = buf + Libisofs_grub2_mbr_patch_poS;
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for (i = 0; i < 8; i++)
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wpt[i] = blk >> (i * 8);
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}
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return ISO_SUCCESS;
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}
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/* Only for up to 36 characters ISO-8859-1 (or ASCII) input */
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void iso_ascii_utf_16le(uint8_t gap_name[72]);
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/* Parameters of MBR patching for GRUB2
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Might later become variables in Ecma119Image
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*/
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#define Libisofs_grub2_mbr_patch_poS 0x1b0
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#define Libisofs_grub2_mbr_patch_offsT 3
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#endif /* SYSTEM_AREA_H_ */
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