From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 2 Dec 2013 07:45:10 +0000 (-0500)
Subject: workaround clang deficiency affecting thread pointer access on powerpc
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=a4b51633cfdecf597c247afe028c08b520816590;p=musl

workaround clang deficiency affecting thread pointer access on powerpc

based on patch by Richard Pennington, who initially reported the
issue.
---

diff --git a/arch/powerpc/pthread_arch.h b/arch/powerpc/pthread_arch.h
index cb2a70b8..2d1ee43c 100644
--- a/arch/powerpc/pthread_arch.h
+++ b/arch/powerpc/pthread_arch.h
@@ -1,6 +1,11 @@
 static inline struct pthread *__pthread_self()
 {
-	register char* tp __asm__("r2");
+#ifdef __clang__
+	char *tp;
+	__asm__ __volatile__ ("mr %0, 2" : "=r"(tp) : : );
+#else
+	register char *tp __asm__("r2");
+#endif
 	return (pthread_t)(tp - 0x7000 - sizeof(struct pthread));
 }