72df847a94
This reverts9097e3cbca, which was in itself a revert of upstream libcxxrt commits 88bdf6b290da ("Specify double-word alignment for ARM unwind") and b96169641f79 ("Updated Itanium unwind"), and a reapplication of our commit3c4fd2463b("libcxxrt: add padding in __cxa_allocate_* to fix alignment"). The editors/libreoffice port will be patched to be able to cope with the standards-compliant alignment of _Unwind_Exception and consequently, that of __cxa_exception. The layouts and sizes of these structures should then be completely the same for libcxxrt, libunwind and libc++abi. PR: 262008 Reviewed by: emaste, jhb, theraven MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D34488
175 lines
6.4 KiB
C
175 lines
6.4 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2003 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifndef _UNWIND_H
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#define _UNWIND_H
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/* For uint64_t */
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Minimal interface as per C++ ABI draft standard:
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http://www.codesourcery.com/cxx-abi/abi-eh.html */
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typedef enum
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{
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_URC_NO_REASON = 0,
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_URC_OK = 0,
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_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
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_URC_FATAL_PHASE2_ERROR = 2,
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_URC_FATAL_PHASE1_ERROR = 3,
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_URC_NORMAL_STOP = 4,
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_URC_END_OF_STACK = 5,
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_URC_HANDLER_FOUND = 6,
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_URC_INSTALL_CONTEXT = 7,
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_URC_CONTINUE_UNWIND = 8
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}
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_Unwind_Reason_Code;
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typedef int _Unwind_Action;
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#define _UA_SEARCH_PHASE 1
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#define _UA_CLEANUP_PHASE 2
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#define _UA_HANDLER_FRAME 4
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#define _UA_FORCE_UNWIND 8
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struct _Unwind_Context; /* opaque data-structure */
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struct _Unwind_Exception; /* forward-declaration */
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typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
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struct _Unwind_Exception *);
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typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn) (int, _Unwind_Action,
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uint64_t,
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struct _Unwind_Exception *,
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struct _Unwind_Context *,
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void *);
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/* The C++ ABI requires exception_class, private_1, and private_2 to
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be of type uint64 and the entire structure to be
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double-word-aligned. Please note that exception_class stays 64-bit
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even on 32-bit machines for gcc compatibility. */
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struct _Unwind_Exception
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{
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uint64_t exception_class;
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_Unwind_Exception_Cleanup_Fn exception_cleanup;
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uintptr_t private_1;
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uintptr_t private_2;
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#if __SIZEOF_POINTER__ == 4
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uint32_t reserved[3];
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#endif
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} __attribute__((__aligned__));
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extern _Unwind_Reason_Code _Unwind_RaiseException (struct _Unwind_Exception *);
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extern _Unwind_Reason_Code _Unwind_ForcedUnwind (struct _Unwind_Exception *,
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_Unwind_Stop_Fn, void *);
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extern void _Unwind_Resume (struct _Unwind_Exception *);
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extern void _Unwind_DeleteException (struct _Unwind_Exception *);
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extern unsigned long _Unwind_GetGR (struct _Unwind_Context *, int);
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extern void _Unwind_SetGR (struct _Unwind_Context *, int, unsigned long);
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extern unsigned long _Unwind_GetIP (struct _Unwind_Context *);
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extern unsigned long _Unwind_GetIPInfo (struct _Unwind_Context *, int *);
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extern void _Unwind_SetIP (struct _Unwind_Context *, unsigned long);
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extern unsigned long _Unwind_GetLanguageSpecificData (struct _Unwind_Context*);
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extern unsigned long _Unwind_GetRegionStart (struct _Unwind_Context *);
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#ifdef _GNU_SOURCE
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/* Callback for _Unwind_Backtrace(). The backtrace stops immediately
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if the callback returns any value other than _URC_NO_REASON. */
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typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (struct _Unwind_Context *,
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void *);
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/* See http://gcc.gnu.org/ml/gcc-patches/2001-09/msg00082.html for why
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_UA_END_OF_STACK exists. */
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# define _UA_END_OF_STACK 16
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/* If the unwind was initiated due to a forced unwind, resume that
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operation, else re-raise the exception. This is used by
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__cxa_rethrow(). */
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extern _Unwind_Reason_Code
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_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
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/* See http://gcc.gnu.org/ml/gcc-patches/2003-09/msg00154.html for why
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_Unwind_GetBSP() exists. */
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extern unsigned long _Unwind_GetBSP (struct _Unwind_Context *);
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/* Return the "canonical frame address" for the given context.
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This is used by NPTL... */
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extern unsigned long _Unwind_GetCFA (struct _Unwind_Context *);
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/* Return the base-address for data references. */
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extern unsigned long _Unwind_GetDataRelBase (struct _Unwind_Context *);
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/* Return the base-address for text references. */
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extern unsigned long _Unwind_GetTextRelBase (struct _Unwind_Context *);
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/* Call _Unwind_Trace_Fn once for each stack-frame, without doing any
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cleanup. The first frame for which the callback is invoked is the
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one for the caller of _Unwind_Backtrace(). _Unwind_Backtrace()
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returns _URC_END_OF_STACK when the backtrace stopped due to
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reaching the end of the call-chain or _URC_FATAL_PHASE1_ERROR if it
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stops for any other reason. */
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extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
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/* Find the start-address of the procedure containing the specified IP
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or NULL if it cannot be found (e.g., because the function has no
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unwind info). Note: there is not necessarily a one-to-one
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correspondence between source-level functions and procedures: some
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functions don't have unwind-info and others are split into multiple
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procedures. */
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extern void *_Unwind_FindEnclosingFunction (void *);
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/* See also Linux Standard Base Spec:
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http://www.linuxbase.org/spec/refspecs/LSB_1.3.0/gLSB/gLSB/libgcc-s.html */
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#endif /* _GNU_SOURCE */
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#define DECLARE_PERSONALITY_FUNCTION(name) \
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_Unwind_Reason_Code name(int version,\
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_Unwind_Action actions,\
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uint64_t exceptionClass,\
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struct _Unwind_Exception *exceptionObject,\
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struct _Unwind_Context *context);
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#define BEGIN_PERSONALITY_FUNCTION(name) \
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_Unwind_Reason_Code name(int version,\
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_Unwind_Action actions,\
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uint64_t exceptionClass,\
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struct _Unwind_Exception *exceptionObject,\
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struct _Unwind_Context *context)\
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{
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#define CALL_PERSONALITY_FUNCTION(name) name(version, actions, exceptionClass, exceptionObject, context)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _UNWIND_H */
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