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Preventing production of surplus isohybrid MBR partition for BIOS boot image.

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The problem was introduced by rev 1299.
This commit is contained in:
Thomas Schmitt 2016-01-17 16:28:40 +01:00
parent 872b5c6c67
commit 3d15642307
1 changed files with 15 additions and 5 deletions
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18
libisofs/make_isohybrid_mbr.c
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@ -495,8 +495,11 @@ int assess_isohybrid_gpt_apm(Ecma119Image *t, int *gpt_count, int gpt_idx[128],
} }
} }
} }
if (*gpt_count > 0 && !(flag & 4)) if (*gpt_count > 0 && !(flag & 4)) {
(*gpt_count)++; (*gpt_count)++;
if (*gpt_count < 128)
gpt_idx[*gpt_count] = -1;
}
if ((flag & 1) && *gpt_count > 0 && !(flag & 4)) { if ((flag & 1) && *gpt_count > 0 && !(flag & 4)) {
/* Register overall GPT partition */ /* Register overall GPT partition */
memset(gpt_name, 0, 72); memset(gpt_name, 0, 72);
@ -562,13 +565,17 @@ static int insert_apm_head(uint8_t *buf, int apm_count)
static int gpt_images_as_mbr_partitions(Ecma119Image *t, char *wpt, static int gpt_images_as_mbr_partitions(Ecma119Image *t, char *wpt,
int gpt_idx[128], int *gpt_cursor) int gpt_idx[128], int *gpt_cursor)
{ {
int ilx_opts; int ilx_opts, skip = 0;
off_t hd_blocks; off_t hd_blocks;
static uint8_t dummy_chs[3] = { static uint8_t dummy_chs[3] = {
0xfe, 0xff, 0xff, 0xfe, 0xff, 0xff,
}; };
if (t->bootsrc[gpt_idx[*gpt_cursor]] == NULL) { if (gpt_idx[*gpt_cursor] < 0)
skip = 1;
else if (t->bootsrc[gpt_idx[*gpt_cursor]] == NULL)
skip = 1;
if (skip) {
(*gpt_cursor)++; (*gpt_cursor)++;
return 2; return 2;
} }
@ -611,7 +618,7 @@ int make_isolinux_mbr(uint32_t *img_blocks, Ecma119Image *t,
char *wpt; char *wpt;
uint32_t boot_lba; uint32_t boot_lba;
int head_count, sector_count, ret; int head_count, sector_count, ret;
int gpt_count = 0, gpt_idx[128], apm_count = 0, gpt_cursor; int gpt_count = 0, gpt_idx[128], apm_count = 0, gpt_cursor, i;
/* For generating a weak random number */ /* For generating a weak random number */
struct timeval tv; struct timeval tv;
struct timezone tz; struct timezone tz;
@ -620,6 +627,9 @@ int make_isolinux_mbr(uint32_t *img_blocks, Ecma119Image *t,
return iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0, return iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
"Cannot refer by isohybrid MBR to data outside of ISO 9660 filesystem."); "Cannot refer by isohybrid MBR to data outside of ISO 9660 filesystem.");
for (i = 0; i < 128; i++)
gpt_idx[i] = -1;
if (flag & 2) { if (flag & 2) {
part_number = 1; part_number = 1;
part_offset = 1; part_offset = 1;