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authorRich Felker <dalias@aerifal.cx>2015-11-02 16:16:00 -0500
committerRich Felker <dalias@aerifal.cx>2015-11-02 16:16:00 -0500
commit36e8b6a28be5d4ffad966386b1e1c0d0dc6ca11a (patch)
treef77a1af51bc1fba6dba820d46126be942fb526b7 /src/ipc
parentcb1bf2f321b45a06447133b3db00621b7300c456 (diff)
downloadmusl-36e8b6a28be5d4ffad966386b1e1c0d0dc6ca11a.tar.gz
use explicit __cp_cancel label in cancellable syscall asm for all archs
previously, only archs that needed to do stack cleanup defined a __cp_cancel label for acting on cancellation in their syscall asm, and a default definition was provided by a weak alias to __cancel, the C function. this resulted in wrong codegen for arm on gcc versions affected by pr 68178 and possibly similar issues (like pr 66609) on other archs, and also created an inconsistency where the __cp_begin and __cp_end labels were treated as const data but __cp_cancel was treated as a function. this in turn caused incorrect code generation on archs where function pointers point to function descriptors rather than code (for now, only sh/fdpic).
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