Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 297 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/REORG.TODO/sysdeps/unix/sysv/linux/aarch64/sysdep.h
new file mode 100644
index 0000000000..4bb9112d62
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/aarch64/sysdep.h
@@ -0,0 +1,297 @@
+/* Copyright (C) 2005-2017 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
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _LINUX_AARCH64_SYSDEP_H
+#define _LINUX_AARCH64_SYSDEP_H 1
+
+#include <sysdeps/unix/sysdep.h>
+#include <sysdeps/aarch64/sysdep.h>
+#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
+
+/* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO.  */
+#include <dl-sysdep.h>
+
+#include <tls.h>
+
+/* In order to get __set_errno() definition in INLINE_SYSCALL.  */
+#ifndef __ASSEMBLER__
+#include <errno.h>
+#endif
+
+/* For Linux we can use the system call table in the header file
+	/usr/include/asm/unistd.h
+   of the kernel.  But these symbols do not follow the SYS_* syntax
+   so we have to redefine the `SYS_ify' macro here.  */
+#undef SYS_ify
+#define SYS_ify(syscall_name)	(__NR_##syscall_name)
+
+#ifdef __ASSEMBLER__
+
+/* Linux uses a negative return value to indicate syscall errors,
+   unlike most Unices, which use the condition codes' carry flag.
+
+   Since version 2.1 the return value of a system call might be
+   negative even if the call succeeded.  E.g., the `lseek' system call
+   might return a large offset.  Therefore we must not anymore test
+   for < 0, but test for a real error by making sure the value in R0
+   is a real error number.  Linus said he will make sure the no syscall
+   returns a value in -1 .. -4095 as a valid result so we can safely
+   test with -4095.  */
+
+# undef	PSEUDO
+# define PSEUDO(name, syscall_name, args)				      \
+  .text;								      \
+  ENTRY (name);								      \
+    DO_CALL (syscall_name, args);					      \
+    cmn x0, #4095;							      \
+    b.cs .Lsyscall_error;
+
+# undef	PSEUDO_END
+# define PSEUDO_END(name)						      \
+  SYSCALL_ERROR_HANDLER							      \
+  END (name)
+
+# undef	PSEUDO_NOERRNO
+# define PSEUDO_NOERRNO(name, syscall_name, args)			      \
+  .text;								      \
+  ENTRY (name);								      \
+    DO_CALL (syscall_name, args);
+
+# undef	PSEUDO_END_NOERRNO
+# define PSEUDO_END_NOERRNO(name)					      \
+  END (name)
+
+# define ret_NOERRNO ret
+
+/* The function has to return the error code.  */
+# undef	PSEUDO_ERRVAL
+# define PSEUDO_ERRVAL(name, syscall_name, args) \
+  .text;								      \
+  ENTRY (name)								      \
+    DO_CALL (syscall_name, args);					      \
+    neg x0, x0
+
+# undef	PSEUDO_END_ERRVAL
+# define PSEUDO_END_ERRVAL(name) \
+  END (name)
+
+# define ret_ERRVAL ret
+
+# if !IS_IN (libc)
+#  define SYSCALL_ERROR  .Lsyscall_error
+#  if RTLD_PRIVATE_ERRNO
+#   define SYSCALL_ERROR_HANDLER				\
+.Lsyscall_error:						\
+	adrp	x1, C_SYMBOL_NAME(rtld_errno);			\
+	neg     w0, w0;						\
+	str     w0, [x1, :lo12:C_SYMBOL_NAME(rtld_errno)];	\
+	mov	x0, -1;						\
+	RET;
+#  else
+
+#   define SYSCALL_ERROR_HANDLER				\
+.Lsyscall_error:						\
+	adrp	x1, :gottprel:errno;				\
+	neg	w2, w0;						\
+	ldr	PTR_REG(1), [x1, :gottprel_lo12:errno];		\
+	mrs	x3, tpidr_el0;					\
+	mov	x0, -1;						\
+	str	w2, [x1, x3];					\
+	RET;
+#  endif
+# else
+#  define SYSCALL_ERROR __syscall_error
+#  define SYSCALL_ERROR_HANDLER                                 \
+.Lsyscall_error:                                                \
+	b	__syscall_error;
+# endif
+
+/* Linux takes system call args in registers:
+	syscall number	x8
+	arg 1		x0
+	arg 2		x1
+	arg 3		x2
+	arg 4		x3
+	arg 5		x4
+	arg 6		x5
+	arg 7		x6
+
+   The compiler is going to form a call by coming here, through PSEUDO, with
+   arguments
+	syscall number	in the DO_CALL macro
+	arg 1		x0
+	arg 2		x1
+	arg 3		x2
+	arg 4		x3
+	arg 5		x4
+	arg 6		x5
+	arg 7		x6
+
+*/
+
+# undef	DO_CALL
+# define DO_CALL(syscall_name, args)		\
+    mov x8, SYS_ify (syscall_name);		\
+    svc 0
+
+#else /* not __ASSEMBLER__ */
+
+
+/* List of system calls which are supported as vsyscalls.  */
+# define HAVE_CLOCK_GETRES_VSYSCALL	1
+# define HAVE_CLOCK_GETTIME_VSYSCALL	1
+# define HAVE_GETTIMEOFDAY_VSYSCALL	1
+
+/* Previously AArch64 used the generic version without the libc_hidden_def
+   which lead in a non existent __send symbol in libc.so.  */
+# undef HAVE_INTERNAL_SEND_SYMBOL
+
+/* Define a macro which expands into the inline wrapper code for a system
+   call.  */
+# undef INLINE_SYSCALL
+# define INLINE_SYSCALL(name, nr, args...)				\
+  ({ unsigned long _sys_result = INTERNAL_SYSCALL (name, , nr, args);	\
+     if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\
+       {								\
+	 __set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, ));		\
+	 _sys_result = (unsigned long) -1;				\
+       }								\
+     (long) _sys_result; })
+
+# undef INTERNAL_SYSCALL_DECL
+# define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+# undef INTERNAL_SYSCALL_RAW
+# define INTERNAL_SYSCALL_RAW(name, err, nr, args...)		\
+  ({ long _sys_result;						\
+     {								\
+       LOAD_ARGS_##nr (args)					\
+       register long _x8 asm ("x8") = (name);			\
+       asm volatile ("svc	0	// syscall " # name     \
+		     : "=r" (_x0) : "r"(_x8) ASM_ARGS_##nr : "memory");	\
+       _sys_result = _x0;					\
+     }								\
+     _sys_result; })
+
+# undef INTERNAL_SYSCALL
+# define INTERNAL_SYSCALL(name, err, nr, args...)		\
+	INTERNAL_SYSCALL_RAW(SYS_ify(name), err, nr, args)
+
+# undef INTERNAL_SYSCALL_AARCH64
+# define INTERNAL_SYSCALL_AARCH64(name, err, nr, args...)	\
+	INTERNAL_SYSCALL_RAW(__ARM_NR_##name, err, nr, args)
+
+# undef INTERNAL_SYSCALL_ERROR_P
+# define INTERNAL_SYSCALL_ERROR_P(val, err) \
+  ((unsigned long) (val) >= (unsigned long) -4095)
+
+# undef INTERNAL_SYSCALL_ERRNO
+# define INTERNAL_SYSCALL_ERRNO(val, err)	(-(val))
+
+# define LOAD_ARGS_0()				\
+  register long _x0 asm ("x0");
+# define LOAD_ARGS_1(x0)			\
+  long _x0tmp = (long) (x0);			\
+  LOAD_ARGS_0 ()				\
+  _x0 = _x0tmp;
+# define LOAD_ARGS_2(x0, x1)			\
+  long _x1tmp = (long) (x1);			\
+  LOAD_ARGS_1 (x0)				\
+  register long _x1 asm ("x1") = _x1tmp;
+# define LOAD_ARGS_3(x0, x1, x2)		\
+  long _x2tmp = (long) (x2);			\
+  LOAD_ARGS_2 (x0, x1)				\
+  register long _x2 asm ("x2") = _x2tmp;
+# define LOAD_ARGS_4(x0, x1, x2, x3)		\
+  long _x3tmp = (long) (x3);			\
+  LOAD_ARGS_3 (x0, x1, x2)			\
+  register long _x3 asm ("x3") = _x3tmp;
+# define LOAD_ARGS_5(x0, x1, x2, x3, x4)	\
+  long _x4tmp = (long) (x4);			\
+  LOAD_ARGS_4 (x0, x1, x2, x3)			\
+  register long _x4 asm ("x4") = _x4tmp;
+# define LOAD_ARGS_6(x0, x1, x2, x3, x4, x5)	\
+  long _x5tmp = (long) (x5);			\
+  LOAD_ARGS_5 (x0, x1, x2, x3, x4)		\
+  register long _x5 asm ("x5") = _x5tmp;
+# define LOAD_ARGS_7(x0, x1, x2, x3, x4, x5, x6)\
+  long _x6tmp = (long) (x6);			\
+  LOAD_ARGS_6 (x0, x1, x2, x3, x4, x5)		\
+  register long _x6 asm ("x6") = _x6tmp;
+
+# define ASM_ARGS_0
+# define ASM_ARGS_1	, "r" (_x0)
+# define ASM_ARGS_2	ASM_ARGS_1, "r" (_x1)
+# define ASM_ARGS_3	ASM_ARGS_2, "r" (_x2)
+# define ASM_ARGS_4	ASM_ARGS_3, "r" (_x3)
+# define ASM_ARGS_5	ASM_ARGS_4, "r" (_x4)
+# define ASM_ARGS_6	ASM_ARGS_5, "r" (_x5)
+# define ASM_ARGS_7	ASM_ARGS_6, "r" (_x6)
+
+# undef INTERNAL_SYSCALL_NCS
+# define INTERNAL_SYSCALL_NCS(number, err, nr, args...)	\
+	INTERNAL_SYSCALL_RAW (number, err, nr, args)
+
+#endif	/* __ASSEMBLER__ */
+
+/* Pointer mangling is supported for AArch64.  */
+#if (IS_IN (rtld) || \
+     (!defined SHARED && (IS_IN (libc) \
+			  || IS_IN (libpthread))))
+# ifdef __ASSEMBLER__
+/* Note, dst, src, guard, and tmp are all register numbers rather than
+   register names so they will work with both ILP32 and LP64. */
+#  define PTR_MANGLE(dst, src, guard, tmp)                                \
+  LDST_PCREL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local)); \
+  PTR_MANGLE2 (dst, src, guard)
+/* Use PTR_MANGLE2 for efficiency if guard is already loaded.  */
+#  define PTR_MANGLE2(dst, src, guard)\
+  eor x##dst, x##src, x##guard
+#  define PTR_DEMANGLE(dst, src, guard, tmp)\
+  PTR_MANGLE (dst, src, guard, tmp)
+#  define PTR_DEMANGLE2(dst, src, guard)\
+  PTR_MANGLE2 (dst, src, guard)
+# else
+extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
+#  define PTR_MANGLE(var) \
+  (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
+#  define PTR_DEMANGLE(var)     PTR_MANGLE (var)
+# endif
+#else
+# ifdef __ASSEMBLER__
+/* Note, dst, src, guard, and tmp are all register numbers rather than
+   register names so they will work with both ILP32 and LP64. */
+#  define PTR_MANGLE(dst, src, guard, tmp)                             \
+  LDST_GLOBAL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard));   \
+  PTR_MANGLE2 (dst, src, guard)
+/* Use PTR_MANGLE2 for efficiency if guard is already loaded.  */
+#  define PTR_MANGLE2(dst, src, guard)\
+  eor x##dst, x##src, x##guard
+#  define PTR_DEMANGLE(dst, src, guard, tmp)\
+  PTR_MANGLE (dst, src, guard, tmp)
+#  define PTR_DEMANGLE2(dst, src, guard)\
+  PTR_MANGLE2 (dst, src, guard)
+# else
+extern uintptr_t __pointer_chk_guard attribute_relro;
+#  define PTR_MANGLE(var) \
+  (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
+#  define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#endif
+
+#endif /* linux/aarch64/sysdep.h */