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, 114 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/mach/hurd/i386/____longjmp_chk.S b/REORG.TODO/sysdeps/mach/hurd/i386/____longjmp_chk.S
new file mode 100644
index 0000000000..ac28c94e13
--- /dev/null
+++ b/REORG.TODO/sysdeps/mach/hurd/i386/____longjmp_chk.S
@@ -0,0 +1,114 @@
+/* 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 <jmpbuf-offsets.h>
+#include <asm-syntax.h>
+
+#include <signal-defines.h>
+/* #include <signal.h> */
+#define SS_ONSTACK 1
+
+
+	.section .rodata.str1.1,"aMS",@progbits,1
+	.type	longjmp_msg,@object
+longjmp_msg:
+	.string "longjmp causes uninitialized stack frame"
+	.size	longjmp_msg, .-longjmp_msg
+
+
+#ifdef PIC
+# define CALL_FAIL	movl	%ebx, %ecx; /* TODO: what's this mov good for? */ \
+			cfi_register(%ebx,%ecx);			      \
+			LOAD_PIC_REG (bx);				      \
+			leal	longjmp_msg@GOTOFF(%ebx), %eax;		      \
+			call	HIDDEN_JUMPTARGET(__fortify_fail)
+#else
+# define CALL_FAIL	movl	$longjmp_msg, %eax;			      \
+			call	HIDDEN_JUMPTARGET(__fortify_fail)
+#endif
+
+
+	.text
+ENTRY (____longjmp_chk)
+	movl	4(%esp), %ecx	/* User's jmp_buf in %ecx.  */
+
+	/* Save the return address now.  */
+	movl	(JB_PC*4)(%ecx), %edx
+	/* Get the stack pointer.  */
+	movl	(JB_SP*4)(%ecx), %edi
+	cfi_undefined(%edi)
+#ifdef PTR_DEMANGLE
+	PTR_DEMANGLE (%edx)
+	PTR_DEMANGLE (%edi)
+#endif
+
+	cmpl	%edi, %esp
+	/* Jumping to a higher-address frame is always allowed.  */
+	jbe	.Lok
+
+	/* Passing here, we're either about to do something invalid, or we're
+	executing on an alternative signal stack.  */
+
+	/* TODO: need locking?  */
+	/* struct hurd_sigstate * _hurd_self_sigstate (void) */
+#ifdef PIC
+	call    1f
+1:	popl    %ebx
+	addl    $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
+#endif
+	call	JUMPTARGET(_hurd_self_sigstate)
+	/* TODO: %eax and %eax->sigaltstack are always valid?  */
+
+	testl	$SS_ONSTACK, (HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_FLAGS__OFFSET)(%eax)
+	/* Fail if SS_ONSTACK is not set.  */
+	jz	.Lfail
+
+	movl	(HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_SP__OFFSET)(%eax), %ebx
+	addl	(HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_SIZE__OFFSET)(%eax), %ebx
+	subl	%edi, %ebx
+	cmpl	(HURD_SIGSTATE__SIGALTSTACK__OFFSET + SIGALTSTACK__SS_SIZE__OFFSET)(%eax), %ebx
+	/* TODO: comment this calculation.  */
+	jae	.Lok
+
+.Lfail:	CALL_FAIL
+
+.Lok:	/* We add unwind information for the target here.  */
+	cfi_def_cfa(%ecx, 0)
+	cfi_register(%eip, %edx)
+	cfi_register(%esp, %edi)
+	cfi_offset(%ebx, JB_BX*4)
+	cfi_offset(%esi, JB_SI*4)
+	cfi_offset(%edi, JB_DI*4)
+	cfi_offset(%ebp, JB_BP*4)
+
+	movl	8(%esp), %eax	/* Second argument is return value.  */
+	movl	%edi, %esp
+
+	/* Restore registers.  */
+	movl	(JB_BX*4)(%ecx), %ebx
+	movl	(JB_SI*4)(%ecx), %esi
+	movl	(JB_DI*4)(%ecx), %edi
+	movl	(JB_BP*4)(%ecx), %ebp
+	cfi_restore(%ebx)
+	cfi_restore(%esi)
+	cfi_restore(%edi)
+	cfi_restore(%ebp)
+
+	/* Jump to saved PC.  */
+	jmp	*%edx
+END (____longjmp_chk)