x86_64 crash (cross-platform)
Hi Dave,
We've recently seen lcrash fail with a floating point exception
very early in initialization.
Seems to be a binary compiled under one distribution and then
executed on another.
And the solution seems to be the -Wl,--hash-style=both option.
Have others reported this?
There must be a cleaner solution than in my notes below. That is,
an easier way to link with this option.
Thanks.
-Cliff
--------------------------------------------------------------------------
To make crash so that it runs under SLES or RedHat:
cd /home/estes02/cpw/crash-4.0-6.2
make
Compile it on a SLES system:
good:
cpw@spandau:/tmp/cpw/crash-4.0-6.2> readelf -S crash | grep -A1 hash
[ 4] .hash HASH 0000000000400290 00000290
0000000000009490 0000000000000004 A 5 0 8
on a RHEL:
bad:
cpw@alcatraz crash-4.0-6.2 $ readelf -S crash | grep -A1 hash
[ 3] .gnu.hash GNU_HASH 0000000000400240 00000240
000000000000a040 0000000000000000 A 4 0 8
OR
vi gdb-6.1/gdb/configure
---
if test "$GCC" = yes; then
CFLAGS="-g -O2 -Wl,--hash-style=both"
else
CFLAGS="-g -Wl,--hash-style=both"
fi
else
if test "$GCC" = yes; then
CFLAGS="-O2 -Wl,--hash-style=both"
else
CFLAGS="-Wl,--hash-style=both"
---
make
readelf -S crash | grep -A1 hash (should show GNU form)
cpw@alcatraz crash-4.0-6.2 $ readelf -S crash | grep -A1 hash
[ 3] .hash HASH 0000000000400240 00000240
0000000000009490 0000000000000004 A 5 0 8
[ 4] .gnu.hash GNU_HASH 00000000004096d0 000096d0
000000000000a040 0000000000000000 A 5 0 8
------------------------------------------------------------------------
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