Hello World\n
I was recently trying to prepare a nfsroot environment for Motorola PPC 823e
using debootstrap, sarge debs and some hand hacking (I've made that for woody
some months ago without problems) but I'm now stuck with very wierd problems.
I can boot 2.4.20 (compiled with gcc 2.95.4) into woody with glibc 2.2.5,
everything ok
I can boot 2.4.20 (compiled with gcc 2.95.4 or with 3.2.3) into sarge with
glibc 2.3.2, boot ok, shell ok, ls ok, dpkg ok, but:
awk segfaults, strace shows that the segfault happens after mmaping libm.so.6
------ cut ------
# strace /usr/bin/mawk
execve("/usr/bin/mawk", ["/usr/bin/mawk"], [/* 5 vars */]) = 0
uname({sys="Linux", node="192.168.40.10", ...}) = 0
brk(0) = 0x1002bbcc
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/lib/libm.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\0\241"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0644, st_size=475956, ...}) = 0
mmap(0xff6c000, 540596, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xff6c000
mprotect(0xffde000, 73652, PROT_NONE) = 0
mmap(0xffec000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3,0x70000) = 0xffec000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
------ cut ------
OK, I said to me, something wrong with glibc in sarge and floating point, so I
took my brand new glibc 2.3.2 from cross compiler chain and tried to chroot
into it, now the bash from chroot hangs, here after mmap of libnsl.so.1, see
the follwoing latest lines of strace chroot /bin/bash
(the machine can still be pinged from the network, kernel is alive, tcpdump
left alone for hours does not show any network activity)...
------ cut ------
...
...
uname({sys="Linux", node="192.168.40.10", ...}) = 0
socket(PF_UNIX, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_UNIX, path="/var/run/.nscd_socket"}, 110) = -1 ENOENT
(No such file or directory)
close(3) = 0
open("/etc/nsswitch.conf", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/lib/libnss_compat.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\0\30"..., 1024) =
1024
fstat64(3, {st_mode=S_IFREG|0755, st_size=59426, ...}) = 0
mmap(0xfde8000, 110660, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xfde8000
mprotect(0xfdf3000, 65604, PROT_NONE) = 0
mmap(0xfdf8000, 45056, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3,0) = 0xfdf8000
mmap(0xfe03000, 68, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xfe03000
close(3) = 0
open("/lib/libnsl.so.1", O_RDONLY) = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\0B\30"..., 1024) =
1024
fstat64(3, {st_mode=S_IFREG|0755, st_size=100581, ...}) = 0
mmap(0xfdb2000, 151900, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xfdb2000
mprotect(0xfdc4000, 78172, PROT_NONE) = 0
mmap(0xfdd2000, 12288, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
3,0x10000) = 0xfdd2000
------ cut ------
Anyone has a clue what could be the cause? the kernel we are running is a hand
patched ppc 2.4.20, but I've already received a report that 2.4.24 from
denx.de can be booted on our MPC853e based board succesfully, so I'll give it
a try soon, meanwhile I'm just speculating..
thanx,
martin
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