Implement ARM EH support, fix objc_msgSend() to work on ARM.
theraven
14 years ago
parent
2a3a93ec38
commit
9490b1b84e
@ -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, 0, reg, 0, &val);
|
||||
return val;
|
||||
}
|
||||
static inline void _Unwind_SetGR(struct _Unwind_Context *context, int reg, unsigned long val)
|
||||
{
|
||||
_Unwind_VRS_Set(context, 0, reg, 0, &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)
|
||||
@ -0,0 +1,170 @@
|
||||
/* 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 */
|
||||
Loading…
Reference in New Issue