Date: Fri, 13 Jul 2012 11:15:56 -0400 From: Gregor Richards <gr@...due.edu> To: musl@...ts.openwall.com CC: Rich Felker <dalias@...ifal.cx> Subject: Re: mips port working! & remaining issues New cross compiler tarballs, particularly for those wishing for soft float, since that's not workable with the normal tarball: Hard float: https://bitbucket.org/GregorR/musl-cross/downloads/crossx86-mips-linux-musl-2012-07-13-649cec5f.tar.xz Soft float: https://bitbucket.org/GregorR/musl-cross/downloads/crossx86-mips-sf-linux-musl-2012-07-13-649cec5f.tar.xz With valediction, - Gregor Richards On 07/13/12 01:23, Rich Felker wrote: > Hi all, > > According to libc-testsuite, the new mips port of musl is working. If > remaining issues exist, I suspect they're in the bits/*.h files' > definitions of kernel constants and structures, which I could use some > help reviewing. Threads, including cancellation, are known to work, > and mipsel (little endian) mode presumably works but is untested. > > One major omission that remains is the dynamic linker. Due to mips > o32's pathologically bad PIC ABI which has no PC-relative addressing, > the current dynamic linker cannot work as-is. Rather than replacing it > with an ugly mess of fragile early-stage code that depends on > non-optimization by the compiler (the way traditional dynamic linkers > work), I'd rather simply require the dynamic linker and libc to be > loaded at a fixed address chosen at build time -- this is basically > what prelink does. We may be able to use the existing prelink tools, > or just write a small special-purpose tool to prepare libc.so for > loading at a fixed address. > > Another major omission shared with arm is that setjmp/longjmp cannot > preserve floating point registers. This is because I don't yet know > how to determine at runtime whether hard-float is available, and the > registers can't be saved unless they can be determined to exist. Help > solving this problem would also be appreciated. > > Rich
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