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* sysdeps/x86_64/jmpbuf-unwind.h (_jmpbuf_sp): New inline function. (_JMPBUF_UNWINDS_ADJ): Use it, to PTR_DEMANGLE before comparison. * sysdeps/alpha/jmpbuf-unwind.h: Likewise. * sysdeps/i386/jmpbuf-unwind.h: Likewise. * sysdeps/mips/jmpbuf-unwind.h: Likewise. * sysdeps/powerpc/jmpbuf-unwind.h: Likewise. * sysdeps/s390/jmpbuf-unwind.h: Likewise. * sysdeps/sh/jmpbuf-unwind.h: Likewise. * sysdeps/sparc/sparc32/jmpbuf-unwind.h: Likewise. * sysdeps/sparc/sparc64/jmpbuf-unwind.h: Likewise. * sysdeps/unix/sysv/linux/ia64/jmpbuf-unwind.h: Likewise.