Hi,
In checkstack.pl, do you recall the reason for this code snippet:
if ($size > 0x80000000) {
$size = - $size;
$size += 0x80000000;
$size += 0x80000000;
}
There is one (unusual:) case where it fails. Is it needed?
For arch/i386/kernel/efi_stub.S, checkstack reports:
0xc0116f5d efi_call_phys: 1073741824
which is 0x4000_0000 (_ added for readability only), however the
actual change in %esp there is __PAGE_OFFSET (0xc000_0000 on ia32),
so if I alter the "if" test above to check for > 0xf000_0000,
checkstack reports the correct value:
0xc0116f5d efi_call_phys: 3221225472
which is 0xc000_0000.
from objdump of efi_stub.o:
5: 81 ea 00 00 00 c0 sub $0xc0000000,%edx
or I can just ignore it, like I've been doing for awhile...
--
~Randy
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