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New system area type 6 = DEC Alpha SRM boot sector.

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New API calls iso_image_set_alpha_boot(), iso_image_get_alpha_boot().
Thanks to Helge Deller.
This commit is contained in:
Thomas Schmitt
2015-02-28 15:13:38 +01:00
parent 9c33eb5f10
commit 782bb7854e
9 changed files with 269 additions and 21 deletions
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43
libisofs/system_area.c
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@ -913,6 +913,45 @@ static int make_hppa_palo_sector(Ecma119Image *t, uint8_t *buf, int hdrversion,
}
/**
* Write DEC Alpha boot sector. See doc/boot_sectors.txt
*
* learned from cdrkit-1.1.10/genisoimage/boot-alpha.c
* by Steve McIntyre <steve@einval.com>
* who states "Heavily inspired by isomarkboot by David Mosberger in 1996"
*
*/
static int make_dec_alpha_sector(Ecma119Image *t, uint8_t *buf, int flag)
{
int ret, i;
IsoImage *img;
IsoNode *iso_node;
Ecma119Node *ecma_node;
uint64_t size, lba, checksum = 0;
img = t->image;
if (img->alpha_boot_image == NULL)
return ISO_SUCCESS;
ret = boot_nodes_from_iso_path(t, img->alpha_boot_image,
&iso_node, &ecma_node, "DEC Alpha boot file", 0);
if (ret < 0)
return ret;
memset(buf, 0, 512);
strcpy((char *) buf, "Linux/Alpha aboot for ISO filesystem.");
lba = ecma_node->info.file->sections[0].block * 4;
size = ecma_node->info.file->sections[0].size / 512 +
!!(ecma_node->info.file->sections[0].size % 512);
iso_lsb(buf + 480, size & 0xffffffff, 4);
iso_lsb(buf + 484, (size >> 32) & 0xffffffff, 4);
iso_lsb(buf + 488, lba & 0xffffffff, 4);
iso_lsb(buf + 492, (lba >> 32) & 0xffffffff, 4);
for (i = 0; i < 63; i++)
checksum += iso_read_lsb64(buf + 8 * i);
iso_lsb(buf + 504, checksum & 0xffffffff, 4);
iso_lsb(buf + 508, (checksum >> 32) & 0xffffffff, 4);
return ISO_SUCCESS;
}
/* Convenience frontend for iso_register_apm_entry().
name and type are 0-terminated strings.
*/
@ -1778,6 +1817,10 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
ret = make_hppa_palo_sector(t, buf, sa_type, 0);
if (ret != ISO_SUCCESS)
return ret;
} else if (sa_type == 6) {
ret = make_dec_alpha_sector(t, buf, 0);
if (ret != ISO_SUCCESS)
return ret;
} else if ((t->opts->partition_offset > 0 || will_append) &&
sa_type == 0 && t->mbr_req_count == 0) {
/* Write a simple partition table. */