** Description changed:
run qemu with QEMU_LD_PREFIX argument will not load correct library order in
the PATH.
How to reproduce this bug:
These command will download the library of other architectures
wget
https://raw.githubusercontent.com/BinaryAnalysisPlatform/qira/master/fetchlibs.sh
./fetchlibs.sh
This is 32bit binary file,
wget http://train.cs.nctu.edu.tw/files/magic
chmod +x ./magic
qemu-i386 -L /home/apple/libs/i386 /home/apple/magic
This is work fine.
But after you install gcc-multilib, it failed.
sudo apt-get install gcc-multilib
qemu-i386 -L /home/apple/libs/i386 /home/apple/magic
The following is the error message
/home/apple/magic: 0���: ̀Í�: D$(�$: Error 18446744073549536926
Because the order of dynamic linker search the shared library is wrong.
When your system has /lib32 directory, its priority is higher than the
QEMU_LD_PREFIX.
If the system not loaded correspond with the dynamic linker, it will crash.
Code flow:
- linux-user/main.c:
- call loader_exec
- linuxload.c:
- call load_elf_binary
- elfload.c:
- in load_elf_binary function
- dynamic loader will be elf_interpreter
+ linux-user/main.c:
+ call loader_exec
+ linuxload.c:
+ call load_elf_binary
+ elfload.c:
+ in load_elf_binary function
+ dynamic loader will be elf_interpreter
I think the problem should be here.
** Also affects: gcc-defaults (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: gcc-defaults (Ubuntu)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1531352
Title:
QEMU_LD_PREFIX not load correct library order in the PATH
Status in QEMU:
New
Bug description:
run qemu with QEMU_LD_PREFIX argument will not load correct library order in
the PATH.
How to reproduce this bug:
These command will download the library of other architectures
wget
https://raw.githubusercontent.com/BinaryAnalysisPlatform/qira/master/fetchlibs.sh
./fetchlibs.sh
This is 32bit binary file,
wget http://train.cs.nctu.edu.tw/files/magic
chmod +x ./magic
qemu-i386 -L /home/apple/libs/i386 /home/apple/magic
This is work fine.
But after you install gcc-multilib, it failed.
sudo apt-get install gcc-multilib
qemu-i386 -L /home/apple/libs/i386 /home/apple/magic
The following is the error message
/home/apple/magic: 0���: ̀Í�: D$(�$: Error 18446744073549536926
Because the order of dynamic linker search the shared library is wrong.
When your system has /lib32 directory, its priority is higher than the
QEMU_LD_PREFIX.
If the system not loaded correspond with the dynamic linker, it will crash.
Code flow:
linux-user/main.c:
call loader_exec
linuxload.c:
call load_elf_binary
elfload.c:
in load_elf_binary function
dynamic loader will be elf_interpreter
I think the problem should be here.
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https://bugs.launchpad.net/qemu/+bug/1531352/+subscriptions
