3 Commits

Author	SHA1	Message	Date
Jim Paris	4504ca7c82	Whoops -- that #include <cxxabi.h> wasn't supposed to sneak in there. If present, it may already define a __cxxabiv1::__guard that we could use, but that file comes from libstdc++, and I don't think the NuttX buildroot-based toolchain would have that, which is why we need libxx in the first place.	2017-06-09 07:40:31 -06:00
Jim Paris	18289e17ce	Fix C++ __guard implementation for ARM. The standard C++ ABI that most platforms follow defines __guard to be 64 bits. The existing implementation of libxx_cxa_guard.cxx follows this. However, the 32-bit ARM C++ ABI defines it as 32 bits instead, and changes the meaning slightly so only the lowest bit is used. This matters because GCC creates guard symbols without regards to what libxx_cxa_guard.cxx says. So on ARM, gcc allocates 4 bytes, but __cxa_guard_release writes 8 bytes, zeroing out another unlucky variable nearby. Fix it by special-casing 32-bit ARM in libxx_cxa_guard.	2017-06-09 07:16:00 -06:00
Paul A. Patience	d803b64f6b	libxx: Add __cxa_guard_acquire, __cxa_guard_release and __cxa_guard_abort	2015-10-06 13:12:20 -04:00