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From: nir m <ni...@ya...> - 2007-09-24 10:17:39
|
Hi,
I am trying to compile valgrind for a ppc embedded system and encountered two issues:
1. I guess this is more of a general question regarding compiling for embedded environments but its effects come up when using valgrind.
My system mounts its / using NFS. so in my host the directory is say /fs/target, which translates to / on the target.
When I configure valgrind I use --prefix=/fs/target but then when I try to run valgrind i get a memcheck not found error. Naturally this is becuase when I run valgrind from the target, It searches memcheck in /fs/target/.../memcheck. Is there a standard way to install valgrind in /fs/target but have it think that it is installed in / when running?
I could come up with a dirty solution like creating a symlink from /bin/memcheck to /fs/target/bin/memcheck but I'm looking for something cleaner. There is a warning in the INSTALL file regarding copying valgrind from prefix to another location so I haven't got an idea of how to get around that.
2. this is something more specific to my architecture.
When running valgrind I encounter a floating point exception right at startup.
After a bit of digging in the valgrind code, I found that the source is in the file coregrind/m_machine.c in line 393 (valgrind-3.2.3):
if (__builtin_setjmp(env_sigill)) {
have_FX = False;
} else {
__asm__ __volatile__("fsqrt 0,0");//execption here
}
disabling the else clause solves the exception but I have no idea what the side effects are becuause I know nothing about powerpc architercture.
uname -a output:
Linux 10.100.5.151 2.6.16.38 #1 Sun Sep 23 13:18:46 IST 2007 ppc unknown
and if it helps, output of cat /proc/cpuinfo:
cpu : 440EP Rev. C
revision : 24.212 (pvr 4222 18d4)
bogomips : 598.01
vendor : IBM
machine : PPC440EP EVB (Bamboo)
Can anyone shed some light on the meaning of this code and why it might cause an exception in a specific architecture?
Thanks and I'm sorry if any or both of these questions have been asked before. I couldn't find none...
Nir
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