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When loader(8) inspects MBR, it chooses GPT as main partition table,

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when MBR contains only PMBR entry or it is bootcamp-compatible.
If MBR has PMBR entry and some other, the loader rejects it.

Make these checks to be less strict. If loader decided that PMBR
isn't suitable for GPT, it will use MBR.

Reported by:	Paul Thornton
Tested by:	Paul Thornton
MFC after:	1 week
This commit is contained in:
Andrey V. Elsukov 2014-03-21 09:29:01 +00:00
parent 196321d6b0
commit 4c659be325
1 changed files with 5 additions and 8 deletions
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13
sys/boot/common/part.c
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@ -634,7 +634,7 @@ ptable_open(void *dev, off_t sectors, uint16_t sectorsize,
for (i = 0, count = 0; i < NDOSPART; i++) {
if (dp[i].dp_flag != 0 && dp[i].dp_flag != 0x80) {
DEBUG("invalid partition flag %x", dp[i].dp_flag);
break;
goto out;
}
#ifdef LOADER_GPT_SUPPORT
if (dp[i].dp_typ == DOSPTYP_PMBR) {
@ -646,15 +646,12 @@ ptable_open(void *dev, off_t sectors, uint16_t sectorsize,
count++;
}
/* Do we have some invalid values? */
if (i != NDOSPART ||
(table->type == PTABLE_GPT && count > 1)) {
if (table->type == PTABLE_GPT && count > 1) {
if (dp[1].dp_typ != DOSPTYP_HFS) {
table->type = PTABLE_NONE;
DEBUG("invalid values detected, ignore "
"partition table");
goto out;
}
DEBUG("Bootcamp detected");
DEBUG("Incorrect PMBR, ignore it");
} else
DEBUG("Bootcamp detected");
}
#ifdef LOADER_GPT_SUPPORT
if (table->type == PTABLE_GPT) {