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[pcbios] Add extra debugging messages when unhiding iPXE from memory

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2013-03-08 12:22:56 +00:00
parent 3a8dbd9cdf
commit b33082a52b
1 changed files with 15 additions and 5 deletions
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20
src/arch/i386/firmware/pcbios/hidemem.c
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@ -190,6 +190,8 @@ static void hide_etherboot ( void ) {
* possible.
*/
static void unhide_etherboot ( int flags __unused ) {
struct memory_map memmap;
int rc;
/* If we have more than one hooked interrupt at this point, it
* means that some other vector is still hooked, in which case
@ -203,15 +205,23 @@ static void unhide_etherboot ( int flags __unused ) {
return;
}
/* Try to unhook INT 15. If it fails, then just leave it
* hooked; it takes care of protecting itself. :)
*/
unhook_bios_interrupt ( 0x15, ( unsigned int ) int15,
&int15_vector );
/* Try to unhook INT 15 */
if ( ( rc = unhook_bios_interrupt ( 0x15, ( unsigned int ) int15,
&int15_vector ) ) != 0 ) {
DBG ( "Cannot unhook INT15: %s\n", strerror ( rc ) );
/* Leave it hooked; there's nothing else we can do,
* and it should be intrinsically safe (though
* wasteful of RAM).
*/
}
/* Unhook fake E820 map, if used */
if ( FAKE_E820 )
unfake_e820();
/* Dump memory map after unhiding */
DBG ( "Unhidden iPXE from system memory map\n" );
get_memmap ( &memmap );
}
/** Hide Etherboot startup function */