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[PATCH v3 5/9] aarch64: Use tpidr_el0 rather than __read_tp in librt
- From: Richard Henderson <rth at twiddle dot net>
- To: libc-alpha at sourceware dot org
- Cc: marcus dot shawcroft at gmail dot com, Richard Henderson <rth at redhat dot com>
- Date: Sun, 25 May 2014 12:41:45 -0700
- Subject: [PATCH v3 5/9] aarch64: Use tpidr_el0 rather than __read_tp in librt
- Authentication-results: sourceware.org; auth=none
- References: <1401046909-25821-1-git-send-email-rth at twiddle dot net>
From: Richard Henderson <rth@redhat.com>
---
sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h b/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
index fb37618..483d6fe 100644
--- a/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
+++ b/sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
@@ -113,17 +113,9 @@ extern int __local_multiple_threads attribute_hidden;
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P(R) \
- stp x0, x30, [sp, -16]!; \
- cfi_adjust_cfa_offset (16); \
- cfi_rel_offset (x0, 0); \
- cfi_rel_offset (x30, 8); \
- bl __read_tp; \
- sub x0, x0, PTHREAD_SIZEOF; \
- ldr w##R, [x0, PTHREAD_MULTIPLE_THREADS_OFFSET]; \
- ldp x0, x30, [sp], 16; \
- cfi_restore (x0); \
- cfi_restore (x30); \
- cfi_adjust_cfa_offset (-16)
+ mrs x##R, tpidr_el0; \
+ sub x##R, x##R, PTHREAD_SIZEOF; \
+ ldr w##R, [x##R, PTHREAD_MULTIPLE_THREADS_OFFSET]
# endif
# endif
--
1.9.0