Linux: consolidate ____longjmp_chk

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 0 insertions, 55 deletions

diff --git a/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c b/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c
deleted file mode 100644
index aac1158853..0000000000
--- a/sysdeps/unix/sysv/linux/generic/____longjmp_chk.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* Copyright (C) 2011-2022 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
-   <https://www.gnu.org/licenses/>.  */
-
-#include <jmpbuf-offsets.h>
-#include <sysdep.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stackinfo.h>
-
-#ifdef _STACK_GROWS_DOWN
-#define called_from(this, saved) ((this) < (saved))
-#else
-#define called_from(this, saved) ((this) > (saved))
-#endif
-
-extern void ____longjmp_chk (__jmp_buf __env, int __val)
-  __attribute__ ((__noreturn__));
-
-void ____longjmp_chk (__jmp_buf env, int val)
-{
-  void *this_frame = __builtin_frame_address (0);
-  void *saved_frame = JB_FRAME_ADDRESS (env);
-  stack_t ss;
-
-  /* If "env" is from a frame that called us, we're all set.  */
-  if (called_from(this_frame, saved_frame))
-    __longjmp (env, val);
-
-  /* If we can't get the current stack state, give up and do the longjmp. */
-  if (INTERNAL_SYSCALL_CALL (sigaltstack, NULL, &ss) != 0)
-    __longjmp (env, val);
-
-  /* If we we are executing on the alternate stack and within the
-     bounds, do the longjmp.  */
-  if (ss.ss_flags == SS_ONSTACK
-      && (this_frame >= ss.ss_sp && this_frame < (ss.ss_sp + ss.ss_size)))
-    __longjmp (env, val);
-
-  __fortify_fail ("longjmp causes uninitialized stack frame");
-}