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| author | Florian Weimer <fweimer@redhat.com> | 2021-03-01 15:56:36 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-03-01 15:58:01 +0100 |
| commit | 9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb (patch) | |
| tree | 62e5002b97acab6f776476c2325a37097693b0ea /sysdeps/ia64 | |
| parent | 764e9a0334350f52ab6953bef1db97f9b2e89ca5 (diff) | |
| download | glibc-9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb.zip glibc-9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb.tar.gz glibc-9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb.tar.bz2 | |
Implement <unwind-link.h> 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 <carlos@redhat.com>
Diffstat (limited to 'sysdeps/ia64')
| -rw-r--r-- | sysdeps/ia64/unwind-arch.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/ia64/unwind-arch.h b/sysdeps/ia64/unwind-arch.h new file mode 100644 index 0000000..df294de --- /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 + <https://www.gnu.org/licenses/>. */ + +#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 */ |