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ID Category Severity Reproducibility Date Submitted Last Update
0004074 [uClibc] Architecture Specific major always 07-11-08 19:28 10-14-08 02:44
Reporter wolle View Status public  
Assigned To uClibc
Priority normal Resolution open  
Status feedback   Product Version 0.9.28
Summary 0004074: LD_PRELOAD doesnt seem to work correctly
Description hi

i tried to use tsocks ... a tcp socks wrapper ... but the app always crashed ...

all it does .. it preloads ... the tosckslib

LD_PRELOAD="/usr/lib/libtsocks.so" irssi doesnt work ....

LD_PRELOAD="/usr/lib/libtsocks.so" irssi
Bus error


after some time i realiced this ....
ldd irssi
        libgmodule-1.2.so.0 => /usr/lib/libgmodule-1.2.so.0 (0x2aaee000)
        libglib-1.2.so.0 => /usr/lib/libglib-1.2.so.0 (0x2ab30000)
        libdl.so.0 => /lib/libdl.so.0 (0x2ab98000)
        libncurses.so.5 => /usr/lib/libncurses.so.5 (0x2abdb000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x2ac5c000)
        libc.so.0 => /lib/libc.so.0 (0x2acab000)
        ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x2aaa8000)

when i do this LD_PRELOAD="/usr/lib/libtsocks.so /lib/libuClibc-0.9.29.so" irssi

irssi comes up nice ....

the same for ctorrent ....
but it also needs uClibc++

ldd ctorrent
        libcrypto.so.0.9.8 => /usr/lib/libcrypto.so.0.9.8 (0x2aaee000)
        libuClibc++.so.0 => /usr/lib/libuClibc++.so.0 (0x2ac30000)
        libc.so.0 => /lib/libc.so.0 (0x2aca2000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x2ad46000)
        libdl.so.0 => /lib/libdl.so.0 (0x2ad95000)
        ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x2aaa8000)

LD_PRELOAD="/usr/lib/libtsocks.so /lib/libuClibc-0.9.29.so /usr/lib/libuClib
c++.so.0" ctorrent
Additional Information
Attached Files

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- Notes
(0009204)
wolle
07-11-08 19:45

 the output of ....

LD_PRELOAD="/usr/lib/libtsocks.so" strace irssi


execve("/usr/bin/irssi", ["irssi"], [/* 9 vars */]) = 0
svr4_syscall() = -1 ERRNO_4090 (Unknown error 4090)
stat("/etc/ld.so.cache", 0x7f9a3060) = -1 ENOENT (No such file or directory)
open("/usr/lib/libtsocks.so", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=24982, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaae000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\340\n\0\0004\0\0\0"..., 4096) = 4096
old_mmap(NULL, 294912, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaee000
old_mmap(0x2aaee000, 24720, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x2aaee000
old_mmap(0x2ab34000, 406, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x6000) = 0x2ab34000
old_mmap(0x2ab35000, 944, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2ab35000
close(3) = 0
munmap(0x2aaae000, 4096) = 0
open("/lib/libgmodule-1.2.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/libgmodule-1.2.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/libgmodule-1.2.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=7650, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaae000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0p\n\0\0004\0\0\0"..., 4096) = 4096
old_mmap(NULL, 270336, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab36000
old_mmap(0x2ab36000, 7476, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x2ab36000
old_mmap(0x2ab77000, 3554, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x2ab77000
close(3) = 0
munmap(0x2aaae000, 4096) = 0
open("/lib/libglib-1.2.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/libglib-1.2.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/libglib-1.2.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=162118, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaae000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\320P\0\0004\0\0\0"..., 4096) = 4096
old_mmap(NULL, 425984, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab78000
old_mmap(0x2ab78000, 160772, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x2ab78000
old_mmap(0x2abdf000, 2374, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x27000) = 0x2abdf000
close(3) = 0
munmap(0x2aaae000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=8302, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaae000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0p\10\0\0004\0\0\0"..., 4096) = 4096
old_mmap(NULL, 274432, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2abe0000
old_mmap(0x2abe0000, 6448, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x2abe0000
old_mmap(0x2ac21000, 4206, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x1000) = 0x2ac21000
close(3) = 0
munmap(0x2aaae000, 4096) = 0
open("/lib/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/libncurses.so.5", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=261623, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaae000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\340\313\0\0004\0\0\0"..., 4096) = 4096
old_mmap(NULL, 528384, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ac23000
old_mmap(0x2ac23000, 227852, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x2ac23000
old_mmap(0x2ac9b000, 32247, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x38000) = 0x2ac9b000
old_mmap(0x2aca3000, 1792, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aca3000
close(3) = 0
munmap(0x2aaae000, 4096) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=60806, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaae000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\240\31\0\0004\0\0\0"..., 4096) = 4096
old_mmap(NULL, 323584, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aca4000
old_mmap(0x2aca4000, 58700, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x2aca4000
old_mmap(0x2acf2000, 3462, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0xe000) = 0x2acf2000
close(3) = 0
munmap(0x2aaae000, 4096) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=388979, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaae000
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\10\0\1\0\0\0\300\247\0\0004\0\0\0"..., 4096) = 4096
old_mmap(NULL, 671744, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2acf3000
old_mmap(0x2acf3000, 383684, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x2acf3000
old_mmap(0x2ad90000, 8051, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x5d000) = 0x2ad90000
old_mmap(0x2ad92000, 19408, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2ad92000
close(3) = 0
munmap(0x2aaae000, 4096) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=8302, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=388979, ...}) = 0
close(3) = 0
open("/lib/libdl.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=8302, ...}) = 0
close(3) = 0
open("/lib/libglib-1.2.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/libglib-1.2.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/libglib-1.2.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=162118, ...}) = 0
close(3) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=60806, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=388979, ...}) = 0
close(3) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=60806, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=388979, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=388979, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=388979, ...}) = 0
close(3) = 0
open("/lib/libgcc_s.so.1", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=60806, ...}) = 0
close(3) = 0
open("/lib/libc.so.0", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=388979, ...}) = 0
close(3) = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0755, st_size=20694, ...}) = 0
mprotect(0x2ac21000, 4096, PROT_READ) = 0
mprotect(0x2ad90000, 4096, PROT_READ) = 0
mprotect(0x2aaec000, 4096, PROT_READ) = 0
ioctl(0, TIOCNXCL, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B38400 opost isig icanon echo ...}) = 0
getuid() = 1000
geteuid() = 1000
brk(0) = 0x51e000
brk(0x51f000) = 0x51f000
getuid() = 1000
open("/etc/passwd", O_RDONLY) = 3
ioctl(3, TIOCNXCL, 0x7f9a2fb8) = -1 ENOTTY (Inappropriate ioctl for device)
brk(0x520000) = 0x520000
read(3, "root:x:0:0:root:\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 120
close(3) = 0
access("", X_OK) = -1 ENOENT (No such file or directory)
access("", X_OK) = -1 ENOENT (No such file or directory)
access("", X_OK) = 0
stat("/home/puchu/.irssi", {st_mode=S_IFDIR|0700, st_size=1024, ...}) = 0
open("", O_RDWR) = -1 ENOENT (No such file or directory)
rt_sigaction(SIGTRAP, {SIG_DFL}, NULL, 16) = 0
gettimeofday({1215829503, 440286}, NULL) = 0
stat("/home/puchu/.irssi", {st_mode=S_IFDIR|0700, st_size=1024, ...}) = 0
stat("/home/puchu/.irssi/config", {st_mode=S_IFREG|0600, st_size=7152, ...}) = 0
open("/home/puchu/.irssi/config", O_RDONLY) = 3
--- SIGBUS (Bus error) @ 0 (0) ---
+++ killed by SIGBUS +++
 
(0013224)
khem
10-11-08 02:14

 can you attach the binary or the output of readelf -d on your binary. Mu guess is that most probaly your toolchain is hosed because it is not putting the dependencies in the ELF header
 
(0013554)
wolle
10-14-08 02:44
edited on: 10-14-08 02:45

 readelf -d irssi

Dynamic section at offset 0x160 contains 31 entries:
  Tag Type Name/Value
 0x00000001 (NEEDED) Shared library: [libgmodule-1.2.so.0]
 0x00000001 (NEEDED) Shared library: [libglib-1.2.so.0]
 0x00000001 (NEEDED) Shared library: [libdl.so.0]
 0x00000001 (NEEDED) Shared library: [libncurses.so.5]
 0x00000001 (NEEDED) Shared library: [libgcc_s.so.1]
 0x00000001 (NEEDED) Shared library: [libc.so.0]
 0x0000000f (RPATH) Library rpath: [/mnt/Openwrt/trunk/build_dir/mipsel/glib-1.2.10/ipkg-install/usr/lib]
 0x0000000c (INIT) 0x40e0b4
 0x0000000d (FINI) 0x4c0230
 0x00000004 (HASH) 0x400280
 0x00000005 (STRTAB) 0x407ff0
 0x00000006 (SYMTAB) 0x402880
 0x0000000a (STRSZ) 21939 (bytes)
 0x0000000b (SYMENT) 16 (bytes)
 0x70000016 (MIPS_RLD_MAP) 0x51b300
 0x00000015 (DEBUG) 0x0
 0x00000003 (PLTGOT) 0x51b310
 0x00000011 (REL) 0x0
 0x00000012 (RELSZ) 0 (bytes)
 0x00000013 (RELENT) 8 (bytes)
 0x70000001 (MIPS_RLD_VERSION) 1
 0x70000005 (MIPS_FLAGS) NOTPOT
 0x70000006 (MIPS_BASE_ADDRESS) 0x400000
 0x7000000a (MIPS_LOCAL_GOTNO) 21
 0x70000011 (MIPS_SYMTABNO) 1399
 0x70000012 (MIPS_UNREFEXTNO) 37
 0x70000013 (MIPS_GOTSYM) 0x46
 0x6ffffffe (VERNEED) 0x40e094
 0x6fffffff (VERNEEDNUM) 1
 0x6ffffff0 (VERSYM) 0x40d5a4
 0x00000000 (NULL) 0x0

irssi is a mips executable .. created with openwrt (crosscompile on amd64)... this should explain the weired libpath ...
 

- Issue History
Date Modified Username Field Change
07-11-08 19:28 wolle New Issue
07-11-08 19:28 wolle Status new => assigned
07-11-08 19:28 wolle Assigned To  => uClibc
07-11-08 19:45 wolle Note Added: 0009204
10-11-08 02:14 khem Note Added: 0013224
10-11-08 02:15 khem Status assigned => feedback
10-14-08 02:44 wolle Note Added: 0013554
10-14-08 02:45 wolle Note Edited: 0013554

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