aboutsummaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
authorGravatar Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>2011-05-11 19:52:16 +0200
committerGravatar Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>2011-05-11 19:52:16 +0200
commit7d8c08baf43d27aac22a29e55c1108f31b8d7595 (patch)
tree2b9f610c65d2cace4304b10107013a11d207870e /include
parentbbb07be58509856b4629d7b2a4aa09dbddcb6828 (diff)
downloaduClibc-7d8c08baf43d27aac22a29e55c1108f31b8d7595.tar.gz
uClibc-7d8c08baf43d27aac22a29e55c1108f31b8d7595.tar.bz2
libubacktrace: mv unwind.h to include
Fixes compilation if NPTL is off. I hope this doesn't break ARM EABI but cannot check ATM. Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'include')
-rw-r--r--include/unwind.h220
1 files changed, 220 insertions, 0 deletions
diff --git a/include/unwind.h b/include/unwind.h
new file mode 100644
index 000000000..81fc4db55
--- /dev/null
+++ b/include/unwind.h
@@ -0,0 +1,220 @@
+/* Exception handling and frame unwind runtime interface routines.
+ Copyright (C) 2001, 2003 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* This is derived from the C++ ABI for IA-64. Where we diverge
+ for cross-architecture compatibility are noted with "@@@". */
+
+#ifndef _UNWIND_H
+#define _UNWIND_H 1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Level 1: Base ABI */
+
+/* @@@ The IA-64 ABI uses uint64 throughout. Most places this is
+ inefficient for 32-bit and smaller machines. */
+typedef unsigned _Unwind_Word __attribute__((__mode__(__word__)));
+typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
+#if defined(__ia64__) && defined(__hpux__)
+typedef unsigned _Unwind_Ptr __attribute__((__mode__(__word__)));
+#else
+typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
+#endif
+typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__(__pointer__)));
+
+/* @@@ The IA-64 ABI uses a 64-bit word to identify the producer and
+ consumer of an exception. We'll go along with this for now even on
+ 32-bit machines. We'll need to provide some other option for
+ 16-bit machines and for machines with > 8 bits per byte. */
+typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
+
+/* The unwind interface uses reason codes in several contexts to
+ identify the reasons for failures or other actions. */
+typedef enum
+{
+ _URC_NO_REASON = 0,
+ _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+ _URC_FATAL_PHASE2_ERROR = 2,
+ _URC_FATAL_PHASE1_ERROR = 3,
+ _URC_NORMAL_STOP = 4,
+ _URC_END_OF_STACK = 5,
+ _URC_HANDLER_FOUND = 6,
+ _URC_INSTALL_CONTEXT = 7,
+ _URC_CONTINUE_UNWIND = 8
+} _Unwind_Reason_Code;
+
+
+/* The unwind interface uses a pointer to an exception header object
+ as its representation of an exception being thrown. In general, the
+ full representation of an exception object is language- and
+ implementation-specific, but it will be prefixed by a header
+ understood by the unwind interface. */
+
+struct _Unwind_Exception;
+
+typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
+ struct _Unwind_Exception *);
+
+struct _Unwind_Exception
+{
+ _Unwind_Exception_Class exception_class;
+ _Unwind_Exception_Cleanup_Fn exception_cleanup;
+ _Unwind_Word private_1;
+ _Unwind_Word private_2;
+
+ /* @@@ The IA-64 ABI says that this structure must be double-word aligned.
+ Taking that literally does not make much sense generically. Instead we
+ provide the maximum alignment required by any type for the machine. */
+} __attribute__((__aligned__));
+
+
+/* The ACTIONS argument to the personality routine is a bitwise OR of one
+ or more of the following constants. */
+typedef int _Unwind_Action;
+
+#define _UA_SEARCH_PHASE 1
+#define _UA_CLEANUP_PHASE 2
+#define _UA_HANDLER_FRAME 4
+#define _UA_FORCE_UNWIND 8
+#define _UA_END_OF_STACK 16
+
+/* This is an opaque type used to refer to a system-specific data
+ structure used by the system unwinder. This context is created and
+ destroyed by the system, and passed to the personality routine
+ during unwinding. */
+struct _Unwind_Context;
+
+/* Raise an exception, passing along the given exception object. */
+extern _Unwind_Reason_Code _Unwind_RaiseException (struct _Unwind_Exception *);
+
+/* Raise an exception for forced unwinding. */
+
+typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
+ (int, _Unwind_Action, _Unwind_Exception_Class,
+ struct _Unwind_Exception *, struct _Unwind_Context *, void *);
+
+extern _Unwind_Reason_Code _Unwind_ForcedUnwind (struct _Unwind_Exception *,
+ _Unwind_Stop_Fn,
+ void *);
+
+/* Helper to invoke the exception_cleanup routine. */
+extern void _Unwind_DeleteException (struct _Unwind_Exception *);
+
+/* Resume propagation of an existing exception. This is used after
+ e.g. executing cleanup code, and not to implement rethrowing. */
+extern void _Unwind_Resume (struct _Unwind_Exception *);
+
+/* @@@ Use unwind data to perform a stack backtrace. The trace callback
+ is called for every stack frame in the call chain, but no cleanup
+ actions are performed. */
+typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)
+ (struct _Unwind_Context *, void *);
+
+extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
+
+/* These functions are used for communicating information about the unwind
+ context (i.e. the unwind descriptors and the user register state) between
+ the unwind library and the personality routine and landing pad. Only
+ selected registers maybe manipulated. */
+
+extern _Unwind_Word _Unwind_GetGR (struct _Unwind_Context *, int);
+extern void _Unwind_SetGR (struct _Unwind_Context *, int, _Unwind_Word);
+
+extern _Unwind_Ptr _Unwind_GetIP (struct _Unwind_Context *);
+extern void _Unwind_SetIP (struct _Unwind_Context *, _Unwind_Ptr);
+
+/* @@@ Retrieve the CFA of the given context. */
+extern _Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
+
+extern void *_Unwind_GetLanguageSpecificData (struct _Unwind_Context *);
+
+extern _Unwind_Ptr _Unwind_GetRegionStart (struct _Unwind_Context *);
+
+
+/* The personality routine is the function in the C++ (or other language)
+ runtime library which serves as an interface between the system unwind
+ library and language-specific exception handling semantics. It is
+ specific to the code fragment described by an unwind info block, and
+ it is always referenced via the pointer in the unwind info block, and
+ hence it has no ABI-specified name.
+
+ Note that this implies that two different C++ implementations can
+ use different names, and have different contents in the language
+ specific data area. Moreover, that the language specific data
+ area contains no version info because name of the function invoked
+ provides more effective versioning by detecting at link time the
+ lack of code to handle the different data format. */
+
+typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)
+ (int, _Unwind_Action, _Unwind_Exception_Class,
+ struct _Unwind_Exception *, struct _Unwind_Context *);
+
+/* @@@ The following alternate entry points are for setjmp/longjmp
+ based unwinding. */
+
+struct SjLj_Function_Context;
+extern void _Unwind_SjLj_Register (struct SjLj_Function_Context *);
+extern void _Unwind_SjLj_Unregister (struct SjLj_Function_Context *);
+
+extern _Unwind_Reason_Code _Unwind_SjLj_RaiseException
+ (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind
+ (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
+extern void _Unwind_SjLj_Resume (struct _Unwind_Exception *);
+
+/* @@@ The following provide access to the base addresses for text
+ and data-relative addressing in the LDSA. In order to stay link
+ compatible with the standard ABI for IA-64, we inline these. */
+
+#ifdef __ia64__
+#include <stdlib.h>
+
+static inline _Unwind_Ptr
+_Unwind_GetDataRelBase (struct _Unwind_Context *_C)
+{
+ /* The GP is stored in R1. */
+ return _Unwind_GetGR (_C, 1);
+}
+
+static inline _Unwind_Ptr
+_Unwind_GetTextRelBase (struct _Unwind_Context *_C)
+{
+ abort ();
+ return 0;
+}
+
+/* @@@ Retrieve the Backing Store Pointer of the given context. */
+extern _Unwind_Word _Unwind_GetBSP (struct _Unwind_Context *);
+#else
+extern _Unwind_Ptr _Unwind_GetDataRelBase (struct _Unwind_Context *);
+extern _Unwind_Ptr _Unwind_GetTextRelBase (struct _Unwind_Context *);
+#endif
+
+/* @@@ Given an address, return the entry point of the function that
+ contains it. */
+extern void * _Unwind_FindEnclosingFunction (void *pc);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* unwind.h */