diff --git a/include/unwind.h b/include/unwind.h index e69de29b..1f94a0d2 100644 --- a/include/unwind.h +++ b/include/unwind.h @@ -0,0 +1,151 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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 + +#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, + unsigned long, + 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, but that seems a bit overly IA-64-specific. + Using "unsigned long" instead should give us the desired effect on + IA-64, while being more general. */ +struct _Unwind_Exception + { + unsigned long exception_class; + _Unwind_Exception_Cleanup_Fn exception_cleanup; + unsigned long private_1; + unsigned long private_2; + }; + +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 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 */ + +#ifdef __cplusplus +}; +#endif + +#endif /* _UNWIND_H */ diff --git a/src/_Unwind_Backtrace.c b/src/_Unwind_Backtrace.c index e69de29b..8f43da9a 100644 --- a/src/_Unwind_Backtrace.c +++ b/src/_Unwind_Backtrace.c @@ -0,0 +1,53 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +_Unwind_Reason_Code +_Unwind_Backtrace (_Unwind_Trace_Fn trace, void *trace_parameter) +{ + struct _Unwind_Context context; + unw_context_t uc; + int ret; + + if (_Unwind_InitContext (&context, &uc) < 0) + return _URC_FATAL_PHASE1_ERROR; + + /* Phase 1 (search phase) */ + + while (1) + { + if ((ret = unw_step (&context.cursor)) <= 0) + { + if (ret == 0) + return _URC_END_OF_STACK; + else + return _URC_FATAL_PHASE1_ERROR; + } + + if ((*trace) (&context, trace_parameter) != _URC_NO_REASON) + return _URC_FATAL_PHASE1_ERROR; + } +} diff --git a/src/_Unwind_DeleteException.c b/src/_Unwind_DeleteException.c index e69de29b..83037b79 100644 --- a/src/_Unwind_DeleteException.c +++ b/src/_Unwind_DeleteException.c @@ -0,0 +1,35 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +void +_Unwind_DeleteException (struct _Unwind_Exception *exception_object) +{ + _Unwind_Exception_Cleanup_Fn cleanup = exception_object->exception_cleanup; + + if (cleanup) + (*cleanup) (_URC_FOREIGN_EXCEPTION_CAUGHT, exception_object); +} diff --git a/src/_Unwind_FindEnclosingFunction.c b/src/_Unwind_FindEnclosingFunction.c index e69de29b..c68d35a1 100644 --- a/src/_Unwind_FindEnclosingFunction.c +++ b/src/_Unwind_FindEnclosingFunction.c @@ -0,0 +1,38 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +void * +_Unwind_FindEnclosingFunction (void *ip) +{ + unw_proc_info_t pi; + + if (unw_get_proc_info_by_ip (unw_local_addr_space, (unw_word_t) ip, &pi, 0) + < 0) + return NULL; + + return (void *) pi.start_ip; +} diff --git a/src/_Unwind_ForcedUnwind.c b/src/_Unwind_ForcedUnwind.c index e69de29b..57e374d1 100644 --- a/src/_Unwind_ForcedUnwind.c +++ b/src/_Unwind_ForcedUnwind.c @@ -0,0 +1,48 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +_Unwind_Reason_Code +_Unwind_ForcedUnwind (struct _Unwind_Exception *exception_object, + _Unwind_Stop_Fn stop, void *stop_parameter) +{ + struct _Unwind_Context context; + unw_context_t uc; + + /* We check "stop" here to tell the compiler's inliner that + exception_object->private_1 isn't NULL when calling + _Unwind_Phase2(). */ + if (!stop) + return _URC_FATAL_PHASE2_ERROR; + + if (_Unwind_InitContext (&context, &uc) < 0) + return _URC_FATAL_PHASE2_ERROR; + + exception_object->private_1 = (unsigned long) stop; + exception_object->private_2 = (unsigned long) stop_parameter; + + return _Unwind_Phase2 (exception_object, &context); +} diff --git a/src/_Unwind_GetBSP.c b/src/_Unwind_GetBSP.c index e69de29b..63188c7a 100644 --- a/src/_Unwind_GetBSP.c +++ b/src/_Unwind_GetBSP.c @@ -0,0 +1,39 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetBSP (struct _Unwind_Context *context) +{ +#ifdef UNW_TARGET_IA64 + unw_word_t val; + + unw_get_reg (&context->cursor, UNW_IA64_BSP, &val); + return val; +#else + return 0; +#endif +} diff --git a/src/_Unwind_GetCFA.c b/src/_Unwind_GetCFA.c index e69de29b..b3b91c47 100644 --- a/src/_Unwind_GetCFA.c +++ b/src/_Unwind_GetCFA.c @@ -0,0 +1,35 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetCFA (struct _Unwind_Context *context) +{ + unw_word_t val; + + unw_get_reg (&context->cursor, UNW_REG_SP, &val); + return val; +} diff --git a/src/_Unwind_GetDataRelBase.c b/src/_Unwind_GetDataRelBase.c index e69de29b..cc1e1931 100644 --- a/src/_Unwind_GetDataRelBase.c +++ b/src/_Unwind_GetDataRelBase.c @@ -0,0 +1,34 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetDataRelBase (struct _Unwind_Context *context) +{ + /* Not yet implemented. DWARF2-based exception-handling would need + this, apparently. */ + return 0; +} diff --git a/src/_Unwind_GetGR.c b/src/_Unwind_GetGR.c index e69de29b..d2455d10 100644 --- a/src/_Unwind_GetGR.c +++ b/src/_Unwind_GetGR.c @@ -0,0 +1,40 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetGR (struct _Unwind_Context *context, int index) +{ + unw_word_t val; + + if (index == UNW_REG_SP && context->end_of_stack) + /* _Unwind_ForcedUnwind() requires us to return a NULL + stack-pointer after reaching the end of the stack. */ + return 0; + + unw_get_reg (&context->cursor, index, &val); + return val; +} diff --git a/src/_Unwind_GetIP.c b/src/_Unwind_GetIP.c index e69de29b..343dede3 100644 --- a/src/_Unwind_GetIP.c +++ b/src/_Unwind_GetIP.c @@ -0,0 +1,35 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetIP (struct _Unwind_Context *context) +{ + unw_word_t val; + + unw_get_reg (&context->cursor, UNW_REG_IP, &val); + return val; +} diff --git a/src/_Unwind_GetLanguageSpecificData.c b/src/_Unwind_GetLanguageSpecificData.c index e69de29b..b9735136 100644 --- a/src/_Unwind_GetLanguageSpecificData.c +++ b/src/_Unwind_GetLanguageSpecificData.c @@ -0,0 +1,36 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetLanguageSpecificData (struct _Unwind_Context *context) +{ + unw_proc_info_t pi; + + pi.lsda = 0; + unw_get_proc_info (&context->cursor, &pi); + return pi.lsda; +} diff --git a/src/_Unwind_GetRegionStart.c b/src/_Unwind_GetRegionStart.c index e69de29b..72fadf33 100644 --- a/src/_Unwind_GetRegionStart.c +++ b/src/_Unwind_GetRegionStart.c @@ -0,0 +1,36 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetRegionStart (struct _Unwind_Context *context) +{ + unw_proc_info_t pi; + + pi.start_ip = 0; + unw_get_proc_info (&context->cursor, &pi); + return pi.start_ip; +} diff --git a/src/_Unwind_GetTextRelBase.c b/src/_Unwind_GetTextRelBase.c index e69de29b..96207d2a 100644 --- a/src/_Unwind_GetTextRelBase.c +++ b/src/_Unwind_GetTextRelBase.c @@ -0,0 +1,34 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +unsigned long +_Unwind_GetTextRelBase (struct _Unwind_Context *context) +{ + /* Not yet implemented. DWARF2-based exception-handling would need + this, apparently. */ + return 0; +} diff --git a/src/_Unwind_RaiseException.c b/src/_Unwind_RaiseException.c index e69de29b..02d9e54d 100644 --- a/src/_Unwind_RaiseException.c +++ b/src/_Unwind_RaiseException.c @@ -0,0 +1,101 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +_Unwind_Reason_Code +_Unwind_RaiseException (struct _Unwind_Exception *exception_object) +{ + unsigned long exception_class = exception_object->exception_class; + _Unwind_Personality_Fn personality; + struct _Unwind_Context context; + _Unwind_Reason_Code reason; + unw_proc_info_t pi; + unw_context_t uc; + unw_word_t ip; + int ret; + + debug (1, "%s(exception_object=%p)\n", __FUNCTION__, exception_object); + + if (_Unwind_InitContext (&context, &uc) < 0) + return _URC_FATAL_PHASE1_ERROR; + + /* Phase 1 (search phase) */ + + while (1) + { + if ((ret = unw_step (&context.cursor)) <= 0) + { + if (ret == 0) + { + debug (1, "%s: no handler found\n", __FUNCTION__); + return _URC_END_OF_STACK; + } + else + return _URC_FATAL_PHASE1_ERROR; + } + + if (unw_get_proc_info (&context.cursor, &pi) < 0) + return _URC_FATAL_PHASE1_ERROR; + + personality = (_Unwind_Personality_Fn) pi.handler; + if (personality) + { + reason = (*personality) (_U_VERSION, _UA_SEARCH_PHASE, + exception_class, exception_object, + &context); + if (reason != _URC_CONTINUE_UNWIND) + { + if (reason == _URC_HANDLER_FOUND) + break; + else + { + debug (1, "%s: personality returned %d\n", + __FUNCTION__, reason); + return _URC_FATAL_PHASE1_ERROR; + } + } + } + } + + /* Exceptions are associated with IP-ranges. If a given exception + is handled at a particular IP, it will _always_ be handled at + that IP. If this weren't true, we'd have to track the tuple + (IP,SP,BSP) to uniquely identify the stack frame that's handling + the exception. */ + if (unw_get_reg (&context.cursor, UNW_REG_IP, &ip) < 0) + return _URC_FATAL_PHASE1_ERROR; + exception_object->private_1 = 0; /* clear "stop" pointer */ + exception_object->private_2 = ip; /* save frame marker */ + + debug (1, "%s: found handler for IP=%lx; entering cleanup phase\n", + __FUNCTION__, ip); + + /* Reset the cursor to the first frame: */ + if (unw_init_local (&context.cursor, &uc) < 0) + return _URC_FATAL_PHASE1_ERROR; + + return _Unwind_Phase2 (exception_object, &context); +} diff --git a/src/_Unwind_Resume.c b/src/_Unwind_Resume.c index e69de29b..01a039ae 100644 --- a/src/_Unwind_Resume.c +++ b/src/_Unwind_Resume.c @@ -0,0 +1,39 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +void +_Unwind_Resume (struct _Unwind_Exception *exception_object) +{ + struct _Unwind_Context context; + unw_context_t uc; + + if (_Unwind_InitContext (&context, &uc) < 0) + abort (); + + _Unwind_Phase2 (exception_object, &context); + abort (); +} diff --git a/src/_Unwind_Resume_or_Rethrow.c b/src/_Unwind_Resume_or_Rethrow.c index e69de29b..a3e8ef30 100644 --- a/src/_Unwind_Resume_or_Rethrow.c +++ b/src/_Unwind_Resume_or_Rethrow.c @@ -0,0 +1,43 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +_Unwind_Reason_Code +_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exception_object) +{ + struct _Unwind_Context context; + unw_context_t uc; + + if (exception_object->private_1) + { + if (_Unwind_InitContext (&context, &uc) < 0) + return _URC_FATAL_PHASE2_ERROR; + + return _Unwind_Phase2 (exception_object, &context); + } + else + return _Unwind_RaiseException (exception_object); +} diff --git a/src/_Unwind_SetGR.c b/src/_Unwind_SetGR.c index e69de29b..62cb009b 100644 --- a/src/_Unwind_SetGR.c +++ b/src/_Unwind_SetGR.c @@ -0,0 +1,38 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +void +_Unwind_SetGR (struct _Unwind_Context *context, int index, + unsigned long new_value) +{ + unw_set_reg (&context->cursor, index, new_value); +#ifdef UNW_TARGET_IA64 + if (index >= UNW_IA64_GR && index <= UNW_IA64_GR + 127) + /* Clear the NaT bit. */ + unw_set_reg (&context->cursor, UNW_IA64_NAT + (index - UNW_IA64_GR), 0); +#endif +} diff --git a/src/_Unwind_SetIP.c b/src/_Unwind_SetIP.c index e69de29b..6c5f81eb 100644 --- a/src/_Unwind_SetIP.c +++ b/src/_Unwind_SetIP.c @@ -0,0 +1,32 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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. */ + +#include "unwind-internal.h" + +void +_Unwind_SetIP (struct _Unwind_Context *context, unsigned long new_value) +{ + unw_set_reg (&context->cursor, UNW_REG_IP, new_value); +} diff --git a/src/unwind-internal.h b/src/unwind-internal.h index e69de29b..d410ee3b 100644 --- a/src/unwind-internal.h +++ b/src/unwind-internal.h @@ -0,0 +1,141 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang + +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_internal_h +#define unwind_internal_h + +#define UNW_LOCAL_ONLY + +#include +#include +#include + +#include "internal.h" +#include "tdep.h" + +/* The version of the _Unwind_*() interface implemented by this code. */ +#define _U_VERSION 1 + +typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn) + (int, _Unwind_Action, unsigned long, struct _Unwind_Exception *, + struct _Unwind_Context *); + +struct _Unwind_Context { + unw_cursor_t cursor; + int end_of_stack; /* set to 1 if the end of stack was reached */ +}; + +/* This must be a macro because unw_getcontext() must be invoked from + the callee, even if optimization (and hence inlining) is turned + off. The macro arguments MUST NOT have any side-effects. */ +#define _Unwind_InitContext(context, uc) \ + ((context)->end_of_stack = 0, \ + ((unw_getcontext (uc) < 0 || unw_init_local (&(context)->cursor, uc) < 0) \ + ? -1 : 0)) + +static inline _Unwind_Reason_Code ALWAYS_INLINE +_Unwind_Phase2 (struct _Unwind_Exception *exception_object, + struct _Unwind_Context *context) +{ + _Unwind_Stop_Fn stop = (_Unwind_Stop_Fn) exception_object->private_1; + unsigned long exception_class = exception_object->exception_class; + void *stop_parameter = (void *) exception_object->private_2; + _Unwind_Personality_Fn personality; + _Unwind_Reason_Code reason; + _Unwind_Action actions; + unw_proc_info_t pi; + unw_word_t ip; + int ret; + + actions = _UA_CLEANUP_PHASE; + if (stop) + actions |= _UA_FORCE_UNWIND; + + while (1) + { + ret = unw_step (&context->cursor); + if (ret <= 0) + { + if (ret == 0) + { + actions |= _UA_END_OF_STACK; + context->end_of_stack = 1; + } + else + return _URC_FATAL_PHASE2_ERROR; + } + + if (stop) + { + reason = (*stop) (_U_VERSION, actions, exception_class, + exception_object, context, stop_parameter); + if (reason != _URC_NO_REASON) + /* Stop function may return _URC_FATAL_PHASE2_ERROR if + it's unable to handle end-of-stack condition or + _URC_FATAL_PHASE2_ERROR if something is wrong. Not + that it matters: the resulting state is indeterminate + anyhow so we must return _URC_FATAL_PHASE2_ERROR... */ + return _URC_FATAL_PHASE2_ERROR; + } + + if (context->end_of_stack + || unw_get_proc_info (&context->cursor, &pi) < 0) + return _URC_FATAL_PHASE2_ERROR; + + personality = (_Unwind_Personality_Fn) pi.handler; + if (personality) + { + if (!stop) + { + if (unw_get_reg (&context->cursor, UNW_REG_IP, &ip) < 0) + return _URC_FATAL_PHASE2_ERROR; + + if ((unsigned long) stop_parameter == ip) + actions |= _UA_HANDLER_FRAME; + } + + reason = (*personality) (_U_VERSION, actions, exception_class, + exception_object, context); + if (reason != _URC_CONTINUE_UNWIND) + { + if (reason == _URC_INSTALL_CONTEXT) + { + /* we may regain control via _Unwind_Resume() */ + unw_resume (&context->cursor); + abort (); + } + else + return _URC_FATAL_PHASE2_ERROR; + } + if (actions & _UA_HANDLER_FRAME) + /* The personality routine for the handler-frame changed + it's mind; that's a no-no... */ + abort (); + } + } + return _URC_FATAL_PHASE2_ERROR; /* shouldn't be reached */ +} + +#endif /* unwind_internal_h */