Bug 69088

Summary:	gcc 3.4.2-r2 produces broken build of usermode-sources 2.4.26-r6
Product:	Gentoo Linux	Reporter:	Yassen Damyanov <yd>
Component:	[OLD] GCC Porting	Assignee:	Please assign to toolchain <gcc-porting>
Status:	RESOLVED NEEDINFO
Severity:	normal	CC:	rigo
Priority:	High
Version:	unspecified
Hardware:	x86
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Yassen Damyanov 2004-10-26 19:19:06 UTC

After building usermode-sources 2.4.26-r6 with gcc 3.4.2-r2 and then running the usermode linux, it cannot find its root virtual device. After switching to gcc 3.3.4 and rebuilding the UML, it runs fine. Nothing else has been changed.

Reproducible: Always
Steps to Reproduce:
1.emerge =usermode-sources-2.4.26-r6; cd /usr/src/uml/linux
2.make menuconfig ARCH=um; make linux ARCH=um; cp linux /usr/local/bin
3.linux ubd0=root_fs ubd1=swap_fs eth0=tuntap,,,192.168.0.254

Actual Results:  
# linux2.4-BAD ubd0=root_fs ubd1=swap_fs eth0=tuntap,,,192.168.0.254
Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Checking for /dev/anon on the host...Not available (open failed with errno 2)
Linux version 2.4.26-uml1-r6-1um (root@agur) (gcc version 3.4.2 (Gentoo Linux 3.
4.2-r2, ssp-3.4.1-1, pie-8.7.6.5)) #2 Wed Oct 27 02:48:45 CEST 2004
On node 0 totalpages: 8192
zone(0): 8192 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: ubd0=root_fs ubd1=swap_fs eth0=tuntap,,,192.168.0.254 
root=/dev/ubd0
Calibrating delay loop... 2169.24 BogoMIPS
Memory: 29696k available
Dentry cache hash table entries: 4096 (order: 3, 32768 bytes)
Inode cache hash table entries: 2048 (order: 2, 16384 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 8192 (order: 3, 32768 bytes)
Checking for host processor cmov support...Yes
Checking for host processor xmm support...No
Checking that ptrace can change system call numbers...OK
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
Journalled Block Device driver loaded
devfs: v1.12c (20020818) Richard Gooch (rgooch@atnf.csiro.au)
devfs: boot_options: 0x0
SGI XFS with no debug enabled
pty: 256 Unix98 ptys configured
SLIP: version 0.8.4-NET3.019-NEWTTY (dynamic channels, max=256).
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
PPP generic driver version 2.4.2
Universal TUN/TAP device driver 1.5 (C)1999-2002 Maxim Krasnyansky
Netdevice 0 : TUN/TAP backend - IP = 192.168.0.254
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 4096)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Cannot open root device "ubd0" or 62:00
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 62:00
 <6>SysRq : Show Regs

EIP: 0073:[<40044491>] CPU: 0 Not tainted ESP: 007b:40130fb0 EFLAGS: 00000246
    Not tainted
EAX: 00000000 EBX: 00005d2e ECX: 00000013 EDX: 00005d2e
ESI: 00000000 EDI: 00000000 EBP: 40130fbc DS: 007b ES: 007b
Call Trace: [<a001d8a5>] [<a0011afc>] [<a0001994>] [<a000e5fe>] [<a0020802>]
   [<a0058242>] [<a0159459>] [<a000d580>] [<a0125e10>] [<a000d5c7>] [<a000d580>]
   [<a011f4a9>] [<a000d580>] [<a0125e10>] [<a011f495>] [<a000d580>] [<a0125e10>]
   [<a0125eb0>] [<a000d580>] [<a0125e10>] [<a0125f1d>]

#

Expected Results:  
Find the /dev/ubd/0 and /dev/ubd/1 devices and complete a "virtual boot" up to a 
login prompt.

# emerge info
Portage 2.0.51-r2 (default-x86-2004.2, gcc-3.4.2, glibc-2.3.4.20040808-r1, 2.6.7 
i686)
=================================================================
System uname: 2.6.7 i686 AMD Athlon(tm) 64 Processor 3000+
Gentoo Base System version 1.4.16
Autoconf: sys-devel/autoconf-2.59-r5
Automake: sys-devel/automake-1.8.5-r1
Binutils: sys-devel/binutils-2.14.90.0.8-r1
Headers:  sys-kernel/linux-headers-2.4.21-r1
Libtools: sys-devel/libtool-1.5.2-r5
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CFLAGS="-O3 -march=athlon64 -fomit-frame-pointer -pipe"
CHOST="i686-pc-linux-gnu"
COMPILER=""
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config 
/usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O3 -march=athlon64 -fomit-frame-pointer -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs ccache distlocks sandbox"
GENTOO_MIRRORS="http://linux.rz.ruhr-uni-bochum.de/download/gentoo-mirror/ ftp:
//gentoo.inode.at/source/ http://gentoo.inode.at/ ftp://linux.rz.
ruhr-uni-bochum.de/gentoo-mirror/"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="X509 acpi apm berkdb bitmap-fonts chroot crypt devmap encode gdbm gif 
innodb mysql ncurses nls pam pcntl pcre pdflib perl python readline shared 
sharedmem slang sockets sse ssl svga tcpd truetype uml x86 xml2 zlib"

Comment 1 Rigo 2005-07-11 18:47:51 UTC

I actually got the same errors 'when I compile any 2.6.12 with gcc-4.* (for
instance on modules vesafb-ng)...


r0g1

Comment 2 Mark Loeser (RETIRED) gentoo-dev

2005-11-29 09:44:21 UTC

Do you still have problems with usermode-sources if you use gcc-3.4.4-r1?


The gcc-4 issue would be a seperate bug, please open one if it is still an issue.