Date: Thu, 23 Apr 2020 20:51:01 -0400 From: Rich Felker <dalias@...c.org> To: Tom Storey <tom@...ap.net> Cc: musl@...ts.openwall.com Subject: Re: Building for m68k On Fri, Apr 24, 2020 at 10:36:23AM +1000, Tom Storey wrote: > Thanks Rich. > > Just for gits and shiggles I tried #ifdef'ing out the cas.l instruction in > the atomic_arch.h file for 68020+ processors, and compilation then That won't work. But for NOMMU without a separate kernel domain it would work to do cli;nonatomic_cas;sti (not sure what the actual m68k insns for that are). There are plenty of places where a cas that does nothing will break code, probably even during common paths in simple programs. > proceeded along very smoothly for a while, but then hit another roadblock > in src/setjmp/m68k/longjmp.s where it tries to execute a floating point > instruction, and then subsequently fails with a "needs M68K fpu" error > message. So maybe there was a way to work around that, but FPU adds another > dimension to this problem. You can add a softfloat ABI; nominally there even is one, but it's clearly not working. The setjmp/longjmp files should be made .S instead of .s with #if around the floating point save/restore conditioned on being hardfloat ABI. > Trying to make this work is probably more than I'm really willing to take > on for this project, so I may put it on the back burner and perhaps look at You're really probably 90% there to at least having something that'll build and that should run if you wire up syscalls. Rich
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