glibc/SOURCES/glibc-rh2024347-12.patch

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2022-05-17 10:24:40 +00:00
commit cb976fba4c51ede7bf8cee5035888527c308dfbc
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Dec 15 16:06:25 2021 +0100
powerpc: Use global register variable in <thread_pointer.h>
A local register variable is merely a compiler hint, and so not
appropriate in this context. Move the global register variable into
<thread_pointer.h> and include it from <tls.h>, as there can only
be one global definition for one particular register.
Fixes commit 8dbeb0561eeb876f557ac9eef5721912ec074ea5
("nptl: Add <thread_pointer.h> for defining __thread_pointer").
Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Raphael M Zinsly <rzinsly@linux.ibm.com>
diff --git a/sysdeps/powerpc/nptl/thread_pointer.h b/sysdeps/powerpc/nptl/thread_pointer.h
index 8fd5ba671f6f5e64..4feba5961062cfaf 100644
--- a/sysdeps/powerpc/nptl/thread_pointer.h
+++ b/sysdeps/powerpc/nptl/thread_pointer.h
@@ -19,15 +19,16 @@
#ifndef _SYS_THREAD_POINTER_H
#define _SYS_THREAD_POINTER_H
-static inline void *
-__thread_pointer (void)
-{
#ifdef __powerpc64__
- register void *__result asm ("r13");
+register void *__thread_register asm ("r13");
#else
- register void *__result asm ("r2");
+register void *__thread_register asm ("r2");
#endif
- return __result;
+
+static inline void *
+__thread_pointer (void)
+{
+ return __thread_register;
}
#endif /* _SYS_THREAD_POINTER_H */
diff --git a/sysdeps/powerpc/nptl/tls.h b/sysdeps/powerpc/nptl/tls.h
index e194b334216eaa02..050beb06a8f7de65 100644
--- a/sysdeps/powerpc/nptl/tls.h
+++ b/sysdeps/powerpc/nptl/tls.h
@@ -26,6 +26,7 @@
# include <stddef.h>
# include <stdint.h>
# include <dl-dtv.h>
+# include <thread_pointer.h>
#else /* __ASSEMBLER__ */
# include <tcb-offsets.h>
@@ -36,16 +37,10 @@
#ifndef __powerpc64__
/* Register r2 (tp) is reserved by the ABI as "thread pointer". */
# define PT_THREAD_POINTER PT_R2
-# ifndef __ASSEMBLER__
-register void *__thread_register __asm__ ("r2");
-# endif
#else /* __powerpc64__ */
/* Register r13 (tp) is reserved by the ABI as "thread pointer". */
# define PT_THREAD_POINTER PT_R13
-# ifndef __ASSEMBLER__
-register void *__thread_register __asm__ ("r13");
-# endif
#endif /* __powerpc64__ */
#ifndef __ASSEMBLER__