diff options
Diffstat (limited to 'elfutils/libdw/cfi.h')
| -rw-r--r-- | elfutils/libdw/cfi.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/elfutils/libdw/cfi.h b/elfutils/libdw/cfi.h index 64f3f157..e04e76dd 100644 --- a/elfutils/libdw/cfi.h +++ b/elfutils/libdw/cfi.h @@ -1,5 +1,5 @@ /* Internal definitions for libdw CFI interpreter. - Copyright (C) 2009 Red Hat, Inc. + Copyright (C) 2009-2010 Red Hat, Inc. This file is part of Red Hat elfutils. Red Hat elfutils is free software; you can redistribute it and/or modify @@ -191,8 +191,11 @@ struct Dwarf_Frame_s which has the return_address_register and signal_frame flag. */ struct dwarf_fde *fde; - /* The CFA is unknown, is R+N, or is computed by a DWARF expression. */ - enum { cfa_undefined, cfa_offset, cfa_expr } cfa_rule; + /* The CFA is unknown, is R+N, or is computed by a DWARF expression. + A bogon in the CFI can indicate an invalid/incalculable rule. + We store that as cfa_invalid rather than barfing when processing it, + so callers can ignore the bogon unless they really need that CFA. */ + enum { cfa_undefined, cfa_offset, cfa_expr, cfa_invalid } cfa_rule; union { Dwarf_Op offset; |