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Added unwind headers from libobjc2.

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commit ab4a00983ac953b1eeb7ae644530a94cd1d7c5f0 1 parent 9802a7e
David Chisnall authored
Showing with 372 additions and 0 deletions.
  1. +197 −0 src/unwind-arm.h
  2. +170 −0 src/unwind-itanium.h
  3. +5 −0 src/unwind.h
197 src/unwind-arm.h
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@@ -0,0 +1,197 @@
+/**
+ * ARM-specific unwind definitions. These are taken from the ARM EHABI
+ * specification.
+ */
+ typedef enum
+{
+ _URC_OK = 0, /* operation completed successfully */
+ _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+ _URC_END_OF_STACK = 5,
+ _URC_HANDLER_FOUND = 6,
+ _URC_INSTALL_CONTEXT = 7,
+ _URC_CONTINUE_UNWIND = 8,
+ _URC_FAILURE = 9, /* unspecified failure of some kind */
+ _URC_FATAL_PHASE1_ERROR = _URC_FAILURE
+} _Unwind_Reason_Code;
+
+typedef uint32_t _Unwind_State;
+#ifdef __clang__
+static const _Unwind_State _US_VIRTUAL_UNWIND_FRAME = 0;
+static const _Unwind_State _US_UNWIND_FRAME_STARTING = 1;
+static const _Unwind_State _US_UNWIND_FRAME_RESUME = 2;
+#else // GCC fails at knowing what a constant expression is
+# define _US_VIRTUAL_UNWIND_FRAME 0
+# define _US_UNWIND_FRAME_STARTING 1
+# define _US_UNWIND_FRAME_RESUME 2
+#endif
+
+typedef struct _Unwind_Context _Unwind_Context;
+
+typedef uint32_t _Unwind_EHT_Header;
+
+struct _Unwind_Exception
+{
+ uint64_t exception_class;
+ void (*exception_cleanup)(_Unwind_Reason_Code, struct _Unwind_Exception *);
+ /* Unwinder cache, private fields for the unwinder's use */
+ struct
+ {
+ uint32_t reserved1;
+ uint32_t reserved2;
+ uint32_t reserved3;
+ uint32_t reserved4;
+ uint32_t reserved5;
+ /* init reserved1 to 0, then don't touch */
+ } unwinder_cache;
+ /* Propagation barrier cache (valid after phase 1): */
+ struct
+ {
+ uint32_t sp;
+ uint32_t bitpattern[5];
+ } barrier_cache;
+ /* Cleanup cache (preserved over cleanup): */
+ struct
+ {
+ uint32_t bitpattern[4];
+ } cleanup_cache;
+ /* Pr cache (for pr's benefit): */
+ struct
+ {
+ /** function start address */
+ uint32_t fnstart;
+ /** pointer to EHT entry header word */
+ _Unwind_EHT_Header *ehtp;
+ /** additional data */
+ uint32_t additional;
+ uint32_t reserved1;
+ } pr_cache;
+ /** Force alignment of next item to 8-byte boundary */
+ long long int :0;
+};
+
+/* Unwinding functions */
+_Unwind_Reason_Code _Unwind_RaiseException(struct _Unwind_Exception *ucbp);
+void _Unwind_Resume(struct _Unwind_Exception *ucbp);
+void _Unwind_Complete(struct _Unwind_Exception *ucbp);
+void _Unwind_DeleteException(struct _Unwind_Exception *ucbp);
+void *_Unwind_GetLanguageSpecificData(struct _Unwind_Context*);
+
+typedef enum
+{
+ _UVRSR_OK = 0,
+ _UVRSR_NOT_IMPLEMENTED = 1,
+ _UVRSR_FAILED = 2
+} _Unwind_VRS_Result;
+typedef enum
+{
+ _UVRSC_CORE = 0,
+ _UVRSC_VFP = 1,
+ _UVRSC_WMMXD = 3,
+ _UVRSC_WMMXC = 4
+} _Unwind_VRS_RegClass;
+typedef enum
+{
+ _UVRSD_UINT32 = 0,
+ _UVRSD_VFPX = 1,
+ _UVRSD_UINT64 = 3,
+ _UVRSD_FLOAT = 4,
+ _UVRSD_DOUBLE = 5
+} _Unwind_VRS_DataRepresentation;
+
+_Unwind_VRS_Result _Unwind_VRS_Get(_Unwind_Context *context,
+ _Unwind_VRS_RegClass regclass,
+ uint32_t regno,
+ _Unwind_VRS_DataRepresentation representation,
+ void *valuep);
+_Unwind_VRS_Result _Unwind_VRS_Set(_Unwind_Context *context,
+ _Unwind_VRS_RegClass regclass,
+ uint32_t regno,
+ _Unwind_VRS_DataRepresentation representation,
+ void *valuep);
+
+/* Return the base-address for data references. */
+extern unsigned long _Unwind_GetDataRelBase(struct _Unwind_Context *);
+
+/* Return the base-address for text references. */
+extern unsigned long _Unwind_GetTextRelBase(struct _Unwind_Context *);
+extern unsigned long _Unwind_GetRegionStart(struct _Unwind_Context *);
+
+/**
+ * The next set of functions are compatibility extensions, implementing Itanium
+ * ABI functions on top of ARM ones.
+ */
+
+#define _UA_SEARCH_PHASE 1
+#define _UA_CLEANUP_PHASE 2
+#define _UA_HANDLER_FRAME 4
+#define _UA_FORCE_UNWIND 8
+
+static inline unsigned long _Unwind_GetGR(struct _Unwind_Context *context, int reg)
+{
+ unsigned long val;
+ _Unwind_VRS_Get(context, _UVRSC_CORE, reg, _UVRSD_UINT32, &val);
+ return val;
+}
+static inline void _Unwind_SetGR(struct _Unwind_Context *context, int reg, unsigned long val)
+{
+ _Unwind_VRS_Set(context, _UVRSC_CORE, reg, _UVRSD_UINT32, &val);
+}
+static inline unsigned long _Unwind_GetIP(_Unwind_Context *context)
+{
+ // Low bit store the thumb state - discard it
+ return _Unwind_GetGR(context, 15) & ~1;
+}
+static inline void _Unwind_SetIP(_Unwind_Context *context, unsigned long val)
+{
+ // The lowest bit of the instruction pointer indicates whether we're in
+ // thumb or ARM mode. This is assumed to be fixed throughout a function,
+ // so must be propagated when setting the program counter.
+ unsigned long thumbState = _Unwind_GetGR(context, 15) & 1;
+ _Unwind_SetGR(context, 15, (val | thumbState));
+}
+
+/** GNU API function that unwinds the frame */
+_Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception*, struct _Unwind_Context*);
+
+
+#define DECLARE_PERSONALITY_FUNCTION(name) \
+_Unwind_Reason_Code name(_Unwind_State state,\
+ struct _Unwind_Exception *exceptionObject,\
+ struct _Unwind_Context *context);
+
+#define BEGIN_PERSONALITY_FUNCTION(name) \
+_Unwind_Reason_Code name(_Unwind_State state,\
+ struct _Unwind_Exception *exceptionObject,\
+ struct _Unwind_Context *context)\
+{\
+ fprintf(stderr, "LSDA: %p\n", (void*)_Unwind_GetLanguageSpecificData(context));\
+ fprintf(stderr, "IP: %p\n", (void*)_Unwind_GetIP(context));\
+ int version = 1;\
+ uint64_t exceptionClass = exceptionObject->exception_class;\
+ int actions;\
+ switch (state)\
+ {\
+ default: return _URC_FAILURE;\
+ case _US_VIRTUAL_UNWIND_FRAME:\
+ {\
+ actions = _UA_SEARCH_PHASE;\
+ break;\
+ }\
+ case _US_UNWIND_FRAME_STARTING:\
+ {\
+ actions = _UA_CLEANUP_PHASE;\
+ if (exceptionObject->barrier_cache.sp == _Unwind_GetGR(context, 13))\
+ {\
+ actions |= _UA_HANDLER_FRAME;\
+ }\
+ break;\
+ }\
+ case _US_UNWIND_FRAME_RESUME:\
+ {\
+ return continueUnwinding(exceptionObject, context);\
+ break;\
+ }\
+ }\
+ _Unwind_SetGR (context, 12, (unsigned long)exceptionObject);
+
+#define CALL_PERSONALITY_FUNCTION(name) name(state,exceptionObject,context)
170 src/unwind-itanium.h
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+/* libunwind - a platform-independent unwind library
+ Copyright (C) 2003 Hewlett-Packard Co
+ Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+#ifndef _UNWIND_H
+#define _UNWIND_H
+
+/* For uint64_t */
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Minimal interface as per C++ ABI draft standard:
+
+ http://www.codesourcery.com/cxx-abi/abi-eh.html */
+
+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;
+
+typedef int _Unwind_Action;
+
+#define _UA_SEARCH_PHASE 1
+#define _UA_CLEANUP_PHASE 2
+#define _UA_HANDLER_FRAME 4
+#define _UA_FORCE_UNWIND 8
+
+struct _Unwind_Context; /* opaque data-structure */
+struct _Unwind_Exception; /* forward-declaration */
+
+typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
+ struct _Unwind_Exception *);
+
+typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn) (int, _Unwind_Action,
+ uint64_t,
+ struct _Unwind_Exception *,
+ struct _Unwind_Context *,
+ void *);
+
+/* The C++ ABI requires exception_class, private_1, and private_2 to
+ be of type uint64 and the entire structure to be
+ double-word-aligned. Please note that exception_class stays 64-bit
+ even on 32-bit machines for gcc compatibility. */
+struct _Unwind_Exception
+ {
+ uint64_t exception_class;
+ _Unwind_Exception_Cleanup_Fn exception_cleanup;
+ unsigned long private_1;
+ unsigned long private_2;
+ } __attribute__((__aligned__));
+
+extern _Unwind_Reason_Code _Unwind_RaiseException (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code _Unwind_ForcedUnwind (struct _Unwind_Exception *,
+ _Unwind_Stop_Fn, void *);
+extern void _Unwind_Resume (struct _Unwind_Exception *);
+extern void _Unwind_DeleteException (struct _Unwind_Exception *);
+extern unsigned long _Unwind_GetGR (struct _Unwind_Context *, int);
+extern void _Unwind_SetGR (struct _Unwind_Context *, int, unsigned long);
+extern unsigned long _Unwind_GetIP (struct _Unwind_Context *);
+extern unsigned long _Unwind_GetIPInfo (struct _Unwind_Context *, int *);
+extern void _Unwind_SetIP (struct _Unwind_Context *, unsigned long);
+extern unsigned long _Unwind_GetLanguageSpecificData (struct _Unwind_Context*);
+extern unsigned long _Unwind_GetRegionStart (struct _Unwind_Context *);
+
+#ifdef _GNU_SOURCE
+
+/* Callback for _Unwind_Backtrace(). The backtrace stops immediately
+ if the callback returns any value other than _URC_NO_REASON. */
+typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (struct _Unwind_Context *,
+ void *);
+
+/* See http://gcc.gnu.org/ml/gcc-patches/2001-09/msg00082.html for why
+ _UA_END_OF_STACK exists. */
+# define _UA_END_OF_STACK 16
+
+/* If the unwind was initiated due to a forced unwind, resume that
+ operation, else re-raise the exception. This is used by
+ __cxa_rethrow(). */
+extern _Unwind_Reason_Code
+ _Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
+
+/* See http://gcc.gnu.org/ml/gcc-patches/2003-09/msg00154.html for why
+ _Unwind_GetBSP() exists. */
+extern unsigned long _Unwind_GetBSP (struct _Unwind_Context *);
+
+/* Return the "canonical frame address" for the given context.
+ This is used by NPTL... */
+extern unsigned long _Unwind_GetCFA (struct _Unwind_Context *);
+
+/* Return the base-address for data references. */
+extern unsigned long _Unwind_GetDataRelBase (struct _Unwind_Context *);
+
+/* Return the base-address for text references. */
+extern unsigned long _Unwind_GetTextRelBase (struct _Unwind_Context *);
+
+/* Call _Unwind_Trace_Fn once for each stack-frame, without doing any
+ cleanup. The first frame for which the callback is invoked is the
+ one for the caller of _Unwind_Backtrace(). _Unwind_Backtrace()
+ returns _URC_END_OF_STACK when the backtrace stopped due to
+ reaching the end of the call-chain or _URC_FATAL_PHASE1_ERROR if it
+ stops for any other reason. */
+extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
+
+/* Find the start-address of the procedure containing the specified IP
+ or NULL if it cannot be found (e.g., because the function has no
+ unwind info). Note: there is not necessarily a one-to-one
+ correspondence between source-level functions and procedures: some
+ functions don't have unwind-info and others are split into multiple
+ procedures. */
+extern void *_Unwind_FindEnclosingFunction (void *);
+
+/* See also Linux Standard Base Spec:
+ http://www.linuxbase.org/spec/refspecs/LSB_1.3.0/gLSB/gLSB/libgcc-s.html */
+
+#endif /* _GNU_SOURCE */
+
+#define DECLARE_PERSONALITY_FUNCTION(name) \
+_Unwind_Reason_Code name(int version,\
+ _Unwind_Action actions,\
+ uint64_t exceptionClass,\
+ struct _Unwind_Exception *exceptionObject,\
+ struct _Unwind_Context *context);
+#define BEGIN_PERSONALITY_FUNCTION(name) \
+_Unwind_Reason_Code name(int version,\
+ _Unwind_Action actions,\
+ uint64_t exceptionClass,\
+ struct _Unwind_Exception *exceptionObject,\
+ struct _Unwind_Context *context)\
+{
+
+#define CALL_PERSONALITY_FUNCTION(name) name(version, actions, exceptionClass, exceptionObject, context)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _UNWIND_H */
5 src/unwind.h
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+#ifdef __arm__
+#include "unwind-arm.h"
+#else
+#include "unwind-itanium.h"
+#endif
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