____longjmp_chk is now OS-specific.

We use sigaltstack internally which on some systems is a syscall
and should be used as such.  Move the x86-64 version to the Linux
specific directory and create in its place a file which always
causes compile errors.

1 files changed, 1 insertions, 145 deletions

diff --git a/sysdeps/x86_64/____longjmp_chk.S b/sysdeps/x86_64/____longjmp_chk.S
index 80e4aff36d..0910861a9d 100644
--- a/sysdeps/x86_64/____longjmp_chk.S
+++ b/sysdeps/x86_64/____longjmp_chk.S
@@ -1,145 +1 @@
-/* Copyright (C) 2001,2004,2005,2006,2009 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, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include <sysdep.h>
-#include <jmpbuf-offsets.h>
-#include <asm-syntax.h>
-
-	.section .rodata.str1.1,"aMS",@progbits,1
-	.type	longjmp_msg,@object
-longjmp_msg:
-	.string "longjmp causes uninitialized stack frame"
-	.size	longjmp_msg, .-longjmp_msg
-
-
-//#define __longjmp ____longjmp_chk
-
-#ifdef PIC
-# define CALL_FAIL	leaq	longjmp_msg(%rip), %rdi;		      \
-			call	__GI___fortify_fail
-#else
-# define CALL_FAIL	movq	$longjmp_msg, %rdi;			      \
-			call	__fortify_fail
-#endif
-
-#define CHECK_RSP(reg) \
-	cmpq	reg, %rsp;						      \
-	jbe	.Lok;							      \
-	CALL_FAIL;							      \
-.Lok:
-
-/* Jump to the position specified by ENV, causing the
-   setjmp call there to return VAL, or 1 if VAL is 0.
-   void __longjmp (__jmp_buf env, int val).  */
-	.text
-ENTRY(____longjmp_chk)
-	/* Restore registers.  */
-	movq	(JB_RSP*8)(%rdi),%r8
-	movq	(JB_RBP*8)(%rdi),%r9
-	movq	(JB_PC*8)(%rdi),%rdx
-#ifdef PTR_DEMANGLE
-	PTR_DEMANGLE (%r8)
-	PTR_DEMANGLE (%r9)
-	PTR_DEMANGLE (%rdx)
-#endif
-
-	/* Save function parameters.  */
-	movq	%rdi, %r10
-	movl	%esi, %ecx
-
-	xorl	%eax, %eax
-	cmpq	%r8, %rsp
-	jbe	.Lok
-
-	subq	$24, %rsp
-	cfi_adjust_cfa_offset(24)
-	xorl	%edi, %edi
-	movq	%rsp, %rsi
-	movl	$__NR_sigaltstack, %eax
-	syscall
-	testl	%eax, %eax
-	movl	$0, %eax
-	leaq	24(%rsp), %rsp
-	cfi_adjust_cfa_offset(-24)
-	jne	.Lok
-	movl	8(%rsp), %eax
-	andl	$1, %eax
-
-.Lok:
-	/* We add unwind information for the target here.  */
-	cfi_def_cfa(%r10, 0)
-	cfi_register(%rsp,%r8)
-	cfi_register(%rbp,%r9)
-	cfi_register(%rip,%rdx)
-	cfi_offset(%rbx,JB_RBX*8)
-	cfi_offset(%r12,JB_R12*8)
-	cfi_offset(%r13,JB_R13*8)
-	cfi_offset(%r14,JB_R14*8)
-	cfi_offset(%r15,JB_R15*8)
-
-	xchgq	%r8, %rsp
-	cfi_restore(%rsp)
-	xchgq	%r9, %rbp
-	cfi_restore(%rbp)
-
-	movq	(JB_RBX*8)(%r10),%rbx
-	movq	(JB_R12*8)(%r10),%r12
-	movq	(JB_R13*8)(%r10),%r13
-	movq	(JB_R14*8)(%r10),%r14
-	movq	(JB_R15*8)(%r10),%r15
-
-	cmpq	%rsp, %r8
-	jnbe	.Lcheck
-
-	/* Set return value for setjmp.  */
-.Lout:	movl	%ecx, %eax
-	jmpq	*%rdx
-
-.Lcheck:
-	testl	%eax, %eax
-	je	.Lfail
-
-	subq	$24, %rsp
-	cfi_adjust_cfa_offset(24)
-	xorl	%edi, %edi
-	movq	%rsp, %rsi
-	movl	$__NR_sigaltstack, %eax
-	syscall
-	addq	$24, %rsp
-	cfi_adjust_cfa_offset(-24)
-	testl	$1, 8(%rsp)
-	je	.Lout
-
-.Lfail:	xchgq	%r8, %rsp
-	/* We want the stack trace to show that of the caller.  */
-	cfi_def_cfa(%rsp, 8)
-	cfi_restore(%rsp)
-	cfi_register(%rbp, %r9)
-	cfi_restore(%rip)
-	cfi_restore(%rbx)
-	cfi_restore(%r12)
-	cfi_restore(%r13)
-	cfi_restore(%r14)
-	cfi_restore(%r15)
-
-	xchgq	%r9, %rbp
-	cfi_restore(%rbp)
-
-	CALL_FAIL
-	hlt
-END (BP_SYM (____longjmp_chk))
+#error "OS-specific version needed"