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Code Issues Releases Activity

Don't try to call into BIOS32 handlers outside the normal ROM

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address range.  They may have been trashed earlier in the boot
process, or the directory header may simply be bogus.

PR:		5140
Submitted by:	Joel Faedi <Joel.Faedi@esial.u-nancy.fr>
Brought-to-attention-by: Derek Inksetter <derek@saidev.com>, bde
This commit is contained in:
Mike Smith 1998-01-01 13:26:55 +00:00
parent d92b2035e3
commit d20358b3bd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=32164
2 changed files with 4 additions and 4 deletions
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4
sys/amd64/amd64/bios.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bios.c,v 1.7 1997/10/21 07:40:22 msmith Exp $
* $Id: bios.c,v 1.8 1997/11/07 08:52:26 phk Exp $
*/
/*
@ -83,7 +83,7 @@ bios32_init(void *junk)
ck += cv[i];
}
/* If checksum is OK, enable use of the entrypoint */
if (ck == 0) {
if ((ck == 0) && (sdh->entry < (BIOS_START + BIOS_SIZE))) {
bios32_SDCI = (caddr_t)BIOS_PADDRTOVADDR(sdh->entry);
if (bootverbose) {
printf("Found BIOS32 Service Directory header at %p\n", sdh);

4
sys/i386/i386/bios.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bios.c,v 1.7 1997/10/21 07:40:22 msmith Exp $
* $Id: bios.c,v 1.8 1997/11/07 08:52:26 phk Exp $
*/
/*
@ -83,7 +83,7 @@ bios32_init(void *junk)
ck += cv[i];
}
/* If checksum is OK, enable use of the entrypoint */
if (ck == 0) {
if ((ck == 0) && (sdh->entry < (BIOS_START + BIOS_SIZE))) {
bios32_SDCI = (caddr_t)BIOS_PADDRTOVADDR(sdh->entry);
if (bootverbose) {
printf("Found BIOS32 Service Directory header at %p\n", sdh);