tags 439283 patch thanks On Thu, Aug 23, 2007 at 05:27:54PM -0400, Daniel Schepler wrote: > Package: mbr > Version: 1.1.9-2 > Severity: serious [...] > +Unexpected event 255, code 0xffffffff at 0000:7c00 > FAIL: tests/mbr-2 > ... > ===================== > 12 of 13 tests failed > ===================== > make[1]: *** [check-TESTS] Error 1 > rm table.s86 > make[1]: Leaving directory `/tmp/buildd/mbr-1.1.9' > make: *** [build] Error 2 > > It may be relevant that this build was run under an amd64 kernel, on a > dual core processor.
Yes. This is because the x86-64 kernel architecture doesn't support the vm86() syscall and so returns -1 (a.k.a. the "255" above, when cast to unsigned char). debian/rules actually already tries to detect this and disable the tests in question, but it fails because the use of the 'linux32' personality-switching program causes 'uname -m' to return i686. It turns out that 'linux64' reverses this, and is safe to use even on 32-bit kernels: <slangasek> soren: linux64... a... no-op on 32-bit? <twith> <slangasek> <twitch> <cjwatson> yeah, it's, er, a bit odd <lamont> slangasek: "linux64" == "make my personality my native one. kthxbye" <slangasek> lamont: <twitch> <lamont> it's not a no-op. it changes your personality back to the native one... the fact that you didn't change it to something else beforehand is the strange part.... <slangasek> right... :) <lamont> I didn't write it, I just accidentally hijacked it. <lamont> it was maybe an unfortunate choice of name... but remember that the author was kinda focused on 64-bit architectures <lamont> PER_LINUX = 0x0000, <lamont> PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, <lamont> including in the kernel... <slangasek> right <lamont> and you'd give us different crap if we called the command /usr/bin/linux :) Thus, as discussed in this Ubuntu bug: https://bugs.launchpad.net/ubuntu/+source/mbr/+bug/134404 ... the following patch fixes this bug. Depending on your religion, you may prefer to build-depend on util-linux (>= 2.13) | linux32 rather than the (now) mixed virtual package linux32. diff -u mbr-1.1.9/debian/rules mbr-1.1.9/debian/rules --- mbr-1.1.9/debian/rules +++ mbr-1.1.9/debian/rules @@ -3,7 +3,7 @@ package = mbr docdir = debian/tmp/usr/share/doc/$(package) -KERNEL_ARCH := $(shell uname -m) +KERNEL_ARCH := $(shell linux64 uname -m) CC = gcc -m32 LD = ld -melf_i386 diff -u mbr-1.1.9/debian/control mbr-1.1.9/debian/control --- mbr-1.1.9/debian/control +++ mbr-1.1.9/debian/control @@ -3,7 +3,7 @@ Priority: optional Maintainer: Santiago Garcia Mantinan <[EMAIL PROTECTED]> Standards-Version: 3.7.2 -Build-Depends: bin86, libc6-dev-i386 [amd64], ia32-libs [amd64] +Build-Depends: bin86, libc6-dev-i386 [amd64], ia32-libs [amd64], linux32 Package: mbr Architecture: i386 amd64 Cheers, -- Colin Watson [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
