http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60247
Bug ID: 60247
Summary: AVR ATxmega C++ constructor startup in libgcc.S causes
boot loop
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: bobf at mrp3 dot com
CC: bobf at mrp3 dot com
Host: FreeBSD 8.x
Target: ATxmega processor
Build: avr-gcc port under FreeBSD
Created attachment 32156
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32156&action=edit
a patch file that corrects the problem
In the AVR implementation of GCC, when compiling for an ATXmega processor, the
C++ constructor calls from the startup code in libgcc.S does not preserve
registers before calling constructors. This usually results in a 'boot loop'
in which the processor continuously reboots due to un-handled faults.
gcc info:
COLLECT_GCC=avr-gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/avr/4.5.1/lto-wrapper
Target: avr
Configured with: ./../gcc-4.5.1/configure --target=avr --disable-libssp
--with-gmp=/usr/local --prefix=/usr/local --mandir=/usr/local/man
--infodir=/usr/local/info/ --build=x86_64-portbld-freebsd8.4
Thread model: single
gcc version 4.5.1 (GCC)
