From 9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Mon, 1 Mar 2021 15:56:36 +0100 Subject: Implement for dynamically loading the libgcc_s unwinder This will be used to consolidate the libgcc_s access for backtrace and pthread_cancel. Unlike the existing backtrace implementations, it provides some hardening based on pointer mangling. Reviewed-by: Carlos O'Donell --- sysdeps/ia64/unwind-arch.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 sysdeps/ia64/unwind-arch.h (limited to 'sysdeps/ia64') diff --git a/sysdeps/ia64/unwind-arch.h b/sysdeps/ia64/unwind-arch.h new file mode 100644 index 0000000000..df294dedbe --- /dev/null +++ b/sysdeps/ia64/unwind-arch.h @@ -0,0 +1,32 @@ +/* Dynamic loading of the libgcc unwinder. ia64 customization. + Copyright (C) 2021 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 + . */ + +#ifndef _ARCH_UNWIND_LINK_H + +#define UNWIND_LINK_GETIP 1 +#define UNWIND_LINK_FRAME_STATE_FOR 1 +#define UNWIND_LINK_FRAME_ADJUSTMENT 0 +#define UNWIND_LINK_EXTRA_FIELDS \ + __typeof (_Unwind_GetBSP) *ptr__Unwind_GetBSP; +#define UNWIND_LINK_EXTRA_INIT \ + local.ptr__Unwind_GetBSP \ + = __libc_dlsym (local_libgcc_handle, "_Unwind_GetBSP"); \ + assert (local.ptr__Unwind_GetBSP != NULL); \ + PTR_MANGLE (local.ptr__Unwind_GetBSP); + +#endif /* _ARCH_UNWIND_LINK_H */ -- cgit 1.4.1