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, 0 insertions, 176 deletions

diff --git a/sysdeps/unix/sysv/linux/x86_64/sigaction.c b/sysdeps/unix/sysv/linux/x86_64/sigaction.c
deleted file mode 100644
index be058bac43..0000000000
--- a/sysdeps/unix/sysv/linux/x86_64/sigaction.c
+++ /dev/null
@@ -1,176 +0,0 @@
-/* POSIX.1 `sigaction' call for Linux/x86-64.
-   Copyright (C) 2001-2017 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/>.  */
-
-#include <sysdep.h>
-#include <errno.h>
-#include <stddef.h>
-#include <signal.h>
-#include <string.h>
-
-#include <sysdep.h>
-#include <sys/syscall.h>
-
-/* The difference here is that the sigaction structure used in the
-   kernel is not the same as we use in the libc.  Therefore we must
-   translate it here.  */
-#include <kernel_sigaction.h>
-
-#include "ucontext_i.h"
-
-/* We do not globally define the SA_RESTORER flag so do it here.  */
-#define SA_RESTORER 0x04000000
-
-/* Using the hidden attribute here does not change the code but it
-   helps to avoid warnings.  */
-extern void restore_rt (void) asm ("__restore_rt") attribute_hidden;
-
-
-/* If ACT is not NULL, change the action for SIG to *ACT.
-   If OACT is not NULL, put the old action for SIG in *OACT.  */
-int
-__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
-{
-  int result;
-  struct kernel_sigaction kact, koact;
-
-  if (act)
-    {
-      kact.k_sa_handler = act->sa_handler;
-      memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
-      kact.sa_flags = act->sa_flags | SA_RESTORER;
-
-      kact.sa_restorer = &restore_rt;
-    }
-
-  /* XXX The size argument hopefully will have to be changed to the
-     real size of the user-level sigset_t.  */
-  result = INLINE_SYSCALL (rt_sigaction, 4,
-			   sig, act ? &kact : NULL,
-			   oact ? &koact : NULL, _NSIG / 8);
-  if (oact && result >= 0)
-    {
-      oact->sa_handler = koact.k_sa_handler;
-      memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
-      oact->sa_flags = koact.sa_flags;
-      oact->sa_restorer = koact.sa_restorer;
-    }
-  return result;
-}
-libc_hidden_def (__libc_sigaction)
-
-#include <nptl/sigaction.c>
-
-
-/* NOTE: Please think twice before making any changes to the bits of
-   code below.  GDB needs some intimate knowledge about it to
-   recognize them as signal trampolines, and make backtraces through
-   signal handlers work right.  Important are both the names
-   (__restore_rt) and the exact instruction sequence.
-   If you ever feel the need to make any changes, please notify the
-   appropriate GDB maintainer.
-
-   The unwind information starts a byte before __restore_rt, so that
-   it is found when unwinding, to get an address the unwinder assumes
-   will be in the middle of a call instruction.  See the Linux kernel
-   (the i386 vsyscall, in particular) for an explanation of the complex
-   unwind information used here in order to get the traditional CFA.
-   We do not restore cs - it's only stored as two bytes here so that's
-   a bit tricky.  We don't use the gas cfi directives, so that we can
-   reliably add .cfi_signal_frame.  */
-
-#define do_cfa_expr						\
-  "	.byte 0x0f\n"		/* DW_CFA_def_cfa_expression */	\
-  "	.uleb128 2f-1f\n"	/* length */			\
-  "1:	.byte 0x77\n"		/* DW_OP_breg7 */		\
-  "	.sleb128 " CFI_STRINGIFY (oRSP) "\n"			\
-  "	.byte 0x06\n"		/* DW_OP_deref */		\
-  "2:"
-
-#define do_expr(regno, offset)					\
-  "	.byte 0x10\n"		/* DW_CFA_expression */		\
-  "	.uleb128 " CFI_STRINGIFY (regno) "\n"			\
-  "	.uleb128 2f-1f\n"	/* length */			\
-  "1:	.byte 0x77\n"		/* DW_OP_breg7 */		\
-  "	.sleb128 " CFI_STRINGIFY (offset) "\n"			\
-  "2:"
-
-#define RESTORE(name, syscall) RESTORE2 (name, syscall)
-# define RESTORE2(name, syscall) \
-asm									\
-  (									\
-   /* `nop' for debuggers assuming `call' should not disalign the code.  */ \
-   "	nop\n"								\
-   ".align 16\n"							\
-   ".LSTART_" #name ":\n"						\
-   "	.type __" #name ",@function\n"					\
-   "__" #name ":\n"							\
-   "	movq $" #syscall ", %rax\n"					\
-   "	syscall\n"							\
-   ".LEND_" #name ":\n"							\
-   ".section .eh_frame,\"a\",@progbits\n"				\
-   ".LSTARTFRAME_" #name ":\n"						\
-   "	.long .LENDCIE_" #name "-.LSTARTCIE_" #name "\n"		\
-   ".LSTARTCIE_" #name ":\n"						\
-   "	.long 0\n"	/* CIE ID */					\
-   "	.byte 1\n"	/* Version number */				\
-   "	.string \"zRS\"\n" /* NUL-terminated augmentation string */	\
-   "	.uleb128 1\n"	/* Code alignment factor */			\
-   "	.sleb128 -8\n"	/* Data alignment factor */			\
-   "	.uleb128 16\n"	/* Return address register column (rip) */	\
-   /* Augmentation value length */					\
-   "	.uleb128 .LENDAUGMNT_" #name "-.LSTARTAUGMNT_" #name "\n"	\
-   ".LSTARTAUGMNT_" #name ":\n"						\
-   "	.byte 0x1b\n"	/* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */		\
-   ".LENDAUGMNT_" #name ":\n"						\
-   "	.align " LP_SIZE "\n"						\
-   ".LENDCIE_" #name ":\n"						\
-   "	.long .LENDFDE_" #name "-.LSTARTFDE_" #name "\n" /* FDE len */	\
-   ".LSTARTFDE_" #name ":\n"						\
-   "	.long .LSTARTFDE_" #name "-.LSTARTFRAME_" #name "\n" /* CIE */	\
-   /* `LSTART_' is subtracted 1 as debuggers assume a `call' here.  */	\
-   "	.long (.LSTART_" #name "-1)-.\n" /* PC-relative start addr.  */	\
-   "	.long .LEND_" #name "-(.LSTART_" #name "-1)\n"			\
-   "	.uleb128 0\n"			/* FDE augmentation length */	\
-   do_cfa_expr								\
-   do_expr (8 /* r8 */, oR8)						\
-   do_expr (9 /* r9 */, oR9)						\
-   do_expr (10 /* r10 */, oR10)						\
-   do_expr (11 /* r11 */, oR11)						\
-   do_expr (12 /* r12 */, oR12)						\
-   do_expr (13 /* r13 */, oR13)						\
-   do_expr (14 /* r14 */, oR14)						\
-   do_expr (15 /* r15 */, oR15)						\
-   do_expr (5 /* rdi */, oRDI)						\
-   do_expr (4 /* rsi */, oRSI)						\
-   do_expr (6 /* rbp */, oRBP)						\
-   do_expr (3 /* rbx */, oRBX)						\
-   do_expr (1 /* rdx */, oRDX)						\
-   do_expr (0 /* rax */, oRAX)						\
-   do_expr (2 /* rcx */, oRCX)						\
-   do_expr (7 /* rsp */, oRSP)						\
-   do_expr (16 /* rip */, oRIP)						\
-   /* libgcc-4.1.1 has only `DWARF_FRAME_REGISTERS == 17'.  */		\
-   /* do_expr (49 |* rflags *|, oEFL) */				\
-   /* `cs'/`ds'/`fs' are unaligned and a different size.  */		\
-   /* gas: Error: register save offset not a multiple of 8  */		\
-   "	.align " LP_SIZE "\n"						\
-   ".LENDFDE_" #name ":\n"						\
-   "	.previous\n"							\
-   );
-/* The return code for realtime-signals.  */
-RESTORE (restore_rt, __NR_rt_sigreturn)