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commit cb976fba4c51ede7bf8cee5035888527c308dfbc
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Wed Dec 15 16:06:25 2021 +0100
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powerpc: Use global register variable in <thread_pointer.h>
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A local register variable is merely a compiler hint, and so not
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appropriate in this context. Move the global register variable into
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<thread_pointer.h> and include it from <tls.h>, as there can only
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be one global definition for one particular register.
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Fixes commit 8dbeb0561eeb876f557ac9eef5721912ec074ea5
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("nptl: Add <thread_pointer.h> for defining __thread_pointer").
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Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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Reviewed-by: Raphael M Zinsly <rzinsly@linux.ibm.com>
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diff --git a/sysdeps/powerpc/nptl/thread_pointer.h b/sysdeps/powerpc/nptl/thread_pointer.h
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index 8fd5ba671f6f5e64..4feba5961062cfaf 100644
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--- a/sysdeps/powerpc/nptl/thread_pointer.h
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+++ b/sysdeps/powerpc/nptl/thread_pointer.h
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@@ -19,15 +19,16 @@
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#ifndef _SYS_THREAD_POINTER_H
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#define _SYS_THREAD_POINTER_H
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-static inline void *
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-__thread_pointer (void)
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-{
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#ifdef __powerpc64__
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- register void *__result asm ("r13");
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+register void *__thread_register asm ("r13");
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#else
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- register void *__result asm ("r2");
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+register void *__thread_register asm ("r2");
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#endif
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- return __result;
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+
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+static inline void *
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+__thread_pointer (void)
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+{
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+ return __thread_register;
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}
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#endif /* _SYS_THREAD_POINTER_H */
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diff --git a/sysdeps/powerpc/nptl/tls.h b/sysdeps/powerpc/nptl/tls.h
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index e194b334216eaa02..050beb06a8f7de65 100644
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--- a/sysdeps/powerpc/nptl/tls.h
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+++ b/sysdeps/powerpc/nptl/tls.h
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@@ -26,6 +26,7 @@
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# include <stddef.h>
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# include <stdint.h>
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# include <dl-dtv.h>
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+# include <thread_pointer.h>
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#else /* __ASSEMBLER__ */
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# include <tcb-offsets.h>
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@@ -36,16 +37,10 @@
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#ifndef __powerpc64__
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/* Register r2 (tp) is reserved by the ABI as "thread pointer". */
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# define PT_THREAD_POINTER PT_R2
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-# ifndef __ASSEMBLER__
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-register void *__thread_register __asm__ ("r2");
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-# endif
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#else /* __powerpc64__ */
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/* Register r13 (tp) is reserved by the ABI as "thread pointer". */
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# define PT_THREAD_POINTER PT_R13
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-# ifndef __ASSEMBLER__
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-register void *__thread_register __asm__ ("r13");
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-# endif
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#endif /* __powerpc64__ */
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#ifndef __ASSEMBLER__
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