Merge commit 'refs/top-bases/t/sysvshm' into t/sysvshm

1 files changed, 44 insertions, 1 deletions

diff --git a/sysdeps/unix/sysv/linux/sysdep.h b/sysdeps/unix/sysv/linux/sysdep.h
index c98fc3afcb..4fd0a9bae3 100644
--- a/sysdeps/unix/sysv/linux/sysdep.h
+++ b/sysdeps/unix/sysv/linux/sysdep.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2015-2016 Free Software Foundation, Inc.
+/* Copyright (C) 2015-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -15,6 +15,9 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#include <bits/wordsize.h>
+#include <kernel-features.h>
+
 /* Set error number and return -1.  A target may choose to return the
    internal function, __syscall_error, which sets errno and returns -1.
    We use -1l, instead of -1, so that it can be casted to (void *).  */
@@ -23,3 +26,43 @@
     __set_errno (err);				\
     -1l;					\
   })
+
+/* Provide a dummy argument that can be used to force register
+   alignment for register pairs if required by the syscall ABI.  */
+#ifdef __ASSUME_ALIGNED_REGISTER_PAIRS
+#define __ALIGNMENT_ARG 0,
+#define __ALIGNMENT_COUNT(a,b) b
+#else
+#define __ALIGNMENT_ARG
+#define __ALIGNMENT_COUNT(a,b) a
+#endif
+
+/* Provide a common macro to pass 64-bit value on syscalls.  */
+#if __WORDSIZE == 64 || defined __ASSUME_WORDSIZE64_ILP32
+# define SYSCALL_LL(val)   (val)
+# define SYSCALL_LL64(val) (val)
+#else
+#define SYSCALL_LL(val)   \
+  __LONG_LONG_PAIR ((val) >> 31, (val))
+#define SYSCALL_LL64(val) \
+  __LONG_LONG_PAIR ((long) ((val) >> 32), (long) ((val) & 0xffffffff))
+#endif
+
+/* Provide a common macro to pass 64-bit value on pread and pwrite
+   syscalls.  */
+#ifdef __ASSUME_PRW_DUMMY_ARG
+# define SYSCALL_LL_PRW(val)   0, SYSCALL_LL (val)
+# define SYSCALL_LL64_PRW(val) 0, SYSCALL_LL64 (val)
+#else
+# define SYSCALL_LL_PRW(val)   __ALIGNMENT_ARG SYSCALL_LL (val)
+# define SYSCALL_LL64_PRW(val) __ALIGNMENT_ARG SYSCALL_LL64 (val)
+#endif
+
+/* Provide a macro to pass the off{64}_t argument on p{readv,writev}{64}.  */
+#define LO_HI_LONG(val) \
+ (long) (val), \
+ (long) (((uint64_t) (val)) >> 32)
+
+/* Exports the __send symbol on send.c linux implementation (some ABI have
+   it missing due the usage of a old generic version without it).  */
+#define HAVE_INTERNAL_SEND_SYMBOL	1