Changeset 98 for trunk/bootcode/special/lvm.asm

Timestamp:

Apr 8, 2017, 12:26:49 AM (8 years ago)

Author:

Ben Rietbroek

Message:

Moved LVM sector validation funtion to 'lvm' module [v1.1.1-testing]

CAUTION:
This is a testbuild !
AirBoot uses the BIOS to access disks and a small coding error can trash
partition tables or other vital disk structures. You are advised to make
backups of TRACK0 and EBRs before using this testbuild. More info at:
​https://rousseaux.github.io/netlabs.air-boot/pdf/AirBoot-v1.1.0-manual.pdf

File:

• trunk/bootcode/special/lvm.asm (modified) (1 diff)

trunk/bootcode/special/lvm.asm

@@ -125 +125 @@
 LVM_CheckSectorCRC              EndP
 
+; See if a LVM-sector is valid.
+; In  : si, pointer to sector
+; Out : CY if valid LVM sector, NC if not
+DriveIO_LVMSectorValid           Proc  Near
+        pusha
+
+        call    LVM_CheckSectorSignature
+        ; NC if no signature found
+        jnc     DriveIO_LVMSectorValid_End
+
+        call    LVM_CheckSectorCRC
+        ; Force valid !!!
+        stc
+
+    DriveIO_LVMSectorValid_End:
+        popa
+        ret
+DriveIO_LVMSectorValid           EndP
+
 ; Updates Sector with valid LVM CRC
 ;  This one doesn't check, if it's really an LVM sector, so check before!