My target machine is an HP Jornada 720 (sa1100 based). Found this when trying to boot from flashrom.
Using gcc 3.4.5 / glibc 2.3.5 memset.S is compiled without any errors. However the kernel boots and freezes on memset.S (never returns from function). On early_printk this is just seen as freezing right after "Node 0 : ..." message. Using gcc 3.4.1 / glibc 2.3.2 works nicely. gcc-3.4.5: Reading specs from /opt/crosstool/gcc-3.4.5-glibc-2.3.5/arm-unknown-linux-gnu/lib/gcc/arm-unknown-linux-gnu/3.4.5/specs Configured with: /home/kristoffer/crosstool-0.43/build/arm-unknown-linux-gnu/gcc-3.4.5-glibc-2.3.5/gcc-3.4.5/configure --target=arm-unknown-linux-gnu --host=i686-host_pc-linux-gnu --prefix=/opt/crosstool/gcc-3.4.5-glibc-2.3.5/arm-unknown-linux-gnu --with-headers=/opt/crosstool/gcc-3.4.5-glibc-2.3.5/arm-unknown-linux-gnu/arm-unknown-linux-gnu/include --with-local-prefix=/opt/crosstool/gcc-3.4.5-glibc-2.3.5/arm-unknown-linux-gnu/arm-unknown-linux-gnu --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c,c++ --enable-shared --enable-c99 --enable-long-long Thread model: posix gcc version 3.4.5 gcc-3.4.1: Reading specs from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/specs Configured with: /work/crosstool-0.27/build/arm-linux/gcc-3.4.1-glibc-2.3.2/gcc-3.4.1/configure --target=arm-linux --host=i686-host_pc-linux-gnu --prefix=/usr/local/arm/3.4.1 --with-headers=/usr/local/arm/3.4.1/arm-linux/include --with-local-prefix=/usr/local/arm/3.4.1/arm-linux --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c,c++ --enable-shared --enable-c99 --enable-long-long Thread model: posix gcc version 3.4.1 -- Summary: [ARM] - Kernel (v2.6.24) memset.S bad compile using 3.4.5 Product: gcc Version: 3.4.5 Status: UNCONFIRMED Severity: major Priority: P3 Component: inline-asm AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: kristoffer dot ericson at gmail dot com GCC host triplet: i486-slackware-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35931