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[PATCH v3 6/9] aarch64: Use tpidr_el0 rather than __errno_location 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 12:41:46 -0700
- Subject: [PATCH v3 6/9] aarch64: Use tpidr_el0 rather than __errno_location 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/localplt.data | 1 -
sysdeps/unix/sysv/linux/aarch64/sysdep.h | 19 +++++--------------
2 files changed, 5 insertions(+), 15 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/aarch64/nptl/localplt.data b/sysdeps/unix/sysv/linux/aarch64/nptl/localplt.data
index 84af95d..dfca9a7 100644
--- a/sysdeps/unix/sysv/linux/aarch64/nptl/localplt.data
+++ b/sysdeps/unix/sysv/linux/aarch64/nptl/localplt.data
@@ -12,4 +12,3 @@ libm.so: matherr
libm.so: __signbit
libm.so: __signbitf
libm.so: __signbitl
-libpthread.so: __errno_location
diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
index 0e91f83..8cce986 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
@@ -123,21 +123,12 @@
# define SYSCALL_ERROR_HANDLER \
.Lsyscall_error: \
- stp x29, x30, [sp, -32]!; \
- cfi_adjust_cfa_offset (32); \
- cfi_rel_offset (x29, 0); \
- cfi_rel_offset (x30, 8); \
- add x29, sp, 0; \
- str x19, [sp,16]; \
- neg x19, x0; \
- bl C_SYMBOL_NAME(__errno_location); \
- str w19, [x0]; \
+ adrp x1, :gottprel:errno; \
+ neg w2, w0; \
+ ldr x1, [x1, :gottprel_lo12:errno]; \
+ mrs x3, tpidr_el0; \
mov x0, -1; \
- ldr x19, [sp,16]; \
- ldp x29, x30, [sp], 32; \
- cfi_adjust_cfa_offset (-32); \
- cfi_restore (x29); \
- cfi_restore (x30); \
+ str w2, [x1, x3]; \
RET;
# endif
# else
--
1.9.0