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authorFlorian Weimer <fweimer@redhat.com>2021-03-01 15:56:36 +0100
committerFlorian Weimer <fweimer@redhat.com>2021-03-01 15:58:01 +0100
commit9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb (patch)
tree62e5002b97acab6f776476c2325a37097693b0ea /sysdeps/powerpc/powerpc32
parent764e9a0334350f52ab6953bef1db97f9b2e89ca5 (diff)
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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/powerpc/powerpc32')
-rw-r--r--sysdeps/powerpc/powerpc32/unwind-arch.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/unwind-arch.h b/sysdeps/powerpc/powerpc32/unwind-arch.h
new file mode 100644
index 0000000000..f2869ac3ae
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/unwind-arch.h
@@ -0,0 +1,28 @@
+/* Dynamic loading of the libgcc unwinder.  powerpc 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 _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
+#define UNWIND_LINK_EXTRA_INIT
+
+#endif /* _ARCH_UNWIND_LINK_H */