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Date: Sat, 28 Dec 2013 01:07:56 +0100
From: John Spencer <>
Subject: [RFC][PATCH] x32: initial draft of port

I started off copying the x86_64 port, getting static build to work
and then iteratively fixing problems detected by libc-testsuite.
currently not containing any of the optimized math and string asm.
at this point all tests except math pass, and both static and dynamic
linking work.

there are a couple of intrusive changes into non-arch specific headers,
caused by mismatch of 32bit longs to "kernel" longs (64bit) used in
some structures and as syscall arguments.

especially the current changes to src/internal/syscall.h are very ugly.

discussion is open for better/cleaner ways to get the same

something that didn't make it into this patch is that the arch triple
"x86_64-x32-..." should also be detected by the configure script,
because this is a triple that magically let's binutils and gcc build the
right thing (gcc needs an additional multilib setting to work tho,
--with-multilib-list=mx32). having the arch name itself be x32 seems
cleaner though, especially with regard to the musl-gcc patches in
Gregor's repo that already have hardcoded as dynlinker.

View attachment "x32.patch" of type "text/plain" (87345 bytes)

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