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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/generic/unwind-arch.h | |
| parent | 764e9a0334350f52ab6953bef1db97f9b2e89ca5 (diff) | |
| download | glibc-9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb.tar.gz glibc-9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb.tar.xz glibc-9fc813e1a37d2e2d5e85a97d5ac4fc1c15d839fb.zip | |
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/generic/unwind-arch.h')
| -rw-r--r-- | sysdeps/generic/unwind-arch.h | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/sysdeps/generic/unwind-arch.h b/sysdeps/generic/unwind-arch.h index feda585e8d..ead6674279 100644 --- a/sysdeps/generic/unwind-arch.h +++ b/sysdeps/generic/unwind-arch.h @@ -1,5 +1,5 @@ -/* Return backtrace of current program state. Arch-specific bits. - Copyright (C) 2020-2021 Free Software Foundation, Inc. +/* Dynamic loading of the libgcc unwinder. Generic version of parameters. + 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 @@ -16,15 +16,20 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#ifndef _UNWIND_ARCH_H -#define _UNWIND_ARCH_H +#ifndef _ARCH_UNWIND_LINK_H +#define _ARCH_UNWIND_LINK_H -#include <unwind.h> +/* The _Unwind_GetIP function is supported. */ +#define UNWIND_LINK_GETIP 1 -static inline void * -unwind_arch_adjustment (void *prev, void *addr) -{ - return addr; -} +/* The __frame_state_for function is needed and re-exported from glibc. */ +#define UNWIND_LINK_FRAME_STATE_FOR 0 -#endif +/* No adjustment of the is needed. */ +#define UNWIND_LINK_FRAME_ADJUSTMENT 0 + +/* There are no extra fields in struct unwind_link in the generic version. */ +#define UNWIND_LINK_EXTRA_FIELDS +#define UNWIND_LINK_EXTRA_INIT + +#endif /* _ARCH_UNWIND_LINK_H */ |