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This doesn't seem like a complete fix. Why only fix unpack_int32? If unaligned access is an issue, then all 16- and 32-bit reads and writes should be fixed.
I think the proper way would be to use -mno-unaligned-access for all architectures that do not support unaligned access.
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Per report in #216 and https://bugs.debian.org/872408, the current implementation may raise SIGBUS on ARM platforms that do not support unaligned memory access. Fix this by using a stack variable and memcpy, which gives the compiler more opportunity to generate correct code. While at it, implement hton* and ntoh* in terms of byteswap intrinsics with an open-coded fallback. This drops the dependency on the platform's implementation, which might not necessarily be consistently fast. Smoke-tested locally on cross-compiled armv5tel-softfloat-linux-gnueabi and armv6j-hardfloat-linux-gnueabi with QEMU TCG. Fixes: #216.
elprans
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Oct 27, 2017
Per report in #216 and https://bugs.debian.org/872408, the current implementation may raise SIGBUS on ARM platforms that do not support unaligned memory access. Fix this by using a stack variable and memcpy, which gives the compiler more opportunity to generate correct code. While at it, implement hton* and ntoh* in terms of byteswap intrinsics with an open-coded fallback. This drops the dependency on the platform's implementation, which might not necessarily be consistently fast. Smoke-tested locally on cross-compiled armv5tel-softfloat-linux-gnueabi and armv6j-hardfloat-linux-gnueabi with QEMU TCG. Fixes: #216.
elprans
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Oct 30, 2017
Per report in #216 and https://bugs.debian.org/872408, the current implementation may raise SIGBUS on ARM platforms that do not support unaligned memory access. Fix this by using a stack variable and memcpy, which gives the compiler more opportunity to generate correct code. While at it, implement hton* and ntoh* in terms of byteswap intrinsics with an open-coded fallback. This drops the dependency on the platform's implementation, which might not necessarily be consistently fast. Smoke-tested locally on cross-compiled armv5tel-softfloat-linux-gnueabi and armv6j-hardfloat-linux-gnueabi with QEMU TCG. Fixes: #216.
elprans
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Oct 31, 2017
Per report in #216 and https://bugs.debian.org/872408, the current implementation may raise SIGBUS on ARM platforms that do not support unaligned memory access. Fix this by using a stack variable and memcpy, which gives the compiler more opportunity to generate correct code. While at it, implement hton* and ntoh* in terms of byteswap intrinsics with an open-coded fallback. This drops the dependency on the platform's implementation, which might not necessarily be consistently fast. Smoke-tested locally on cross-compiled armv5tel-softfloat-linux-gnueabi and armv6j-hardfloat-linux-gnueabi with QEMU TCG. Fixes: #216.
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Hi,
I've got a patch from Ubuntu guys that fixes build on armhf. Please consider applying it.
https://bugs.debian.org/872408