Hi all, I am forwarding this mail from Petr Salinger about a problem with GRUB 2 loading acpi.ko (and probably other modules).
In short due to recent changes in the toolchain (not yet identified), the modules are not page aligned anymore, and contains a .comment section. This does not causes any problem when using the original FreeBSD loader, but this causes a kernel panic when used with GRUB 2. This is reported in Debian as bug#544305 [1]. Don't hesitate to ask if you want more details or tests. Thanks, Aurelien [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=544305 On Sun, Aug 30, 2009 at 04:40:33PM +0200, Petr Salinger wrote: > Package: grub2 > User: debian-...@lists.debian.org > Usertags: kfreebsd > X-Debbugs-CC: debian-...@lists.debian.org, grub-devel@gnu.org > > > Hello, > > we have some problems with grub2 and loading acpi.ko for FreeBSD kernel. > With some acpi.ko the kernel panics. The same kernel without acpi.ko > boots fine. See also thread started by > http://lists.debian.org/debian-bsd/2009/08/msg00147.html > > It is still unclear what the real reason is, > so far only acpi enable boots are affected. > It looks like the problem lies in interaction > between gnu linker and grub bootloader and FreeBSD kernel. > > Maybe only GRUB 2 based installation are affected, > the kfreebsd-loader loads acpi.ko from 7.2-5 fine. > > There are 3 different version of acpi.ko, > compiled by different binutils and/or different linking parameters. > > a) acpi_725_fail.ko > b) acpi_b20090805_fail.ko > c) acpi_b20090723_works.ko > > The only difference between b) and c) is .comment section. > After "objcopy --remove-section=.comment" it loads also fine. > > The interesting might be parts of "readelf -l -S", > the differences are: > > Program Headers: > a) > Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align > LOAD 0x000000 0x00000000 0x00000000 0x54248 0x54248 R E 0x1000 > LOAD 0x054248 0x00055248 0x00055248 0x02414 0x03c84 RW 0x1000 > DYNAMIC 0x054248 0x00055248 0x00055248 0x00078 0x00078 RW 0x4 > GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4 > > b), c) > Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align > LOAD 0x000000 0x00000000 0x00000000 0x54008 0x54008 R E 0x1000 > LOAD 0x055000 0x00055000 0x00055000 0x0241c 0x03c8c RW 0x1000 > DYNAMIC 0x055000 0x00055000 0x00055000 0x00078 0x00078 RW 0x4 > GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4 > > Length and attributes of .comment section > > a) [15] .comment PROGBITS 00000000 05665c 000cd8 01 MS 0 > 0 1 > b) [15] .comment PROGBITS 00000000 05741c 000cd8 01 MS 0 > 0 1 > c) [15] .comment PROGBITS 00000000 05741c 001cef 00 0 > 0 1 > > I will try to attach all acpi.ko to the debian BTS later. > > Petr > > > > -- > To UNSUBSCRIBE, email to debian-bsd-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > > -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
