Bring in gcc r128087 to add support for _Unwind_Backtrace on ARM. This is
prior to the licence change so is under the GPLv2.
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26b8b75c54
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69f351c4c2
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=255095
@ -116,5 +116,6 @@ UNWIND_WRAPPER _Unwind_RaiseException 1
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UNWIND_WRAPPER _Unwind_Resume 1
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UNWIND_WRAPPER _Unwind_Resume_or_Rethrow 1
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UNWIND_WRAPPER _Unwind_ForcedUnwind 3
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UNWIND_WRAPPER _Unwind_Backtrace 2
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#endif /* __symbian__ */
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#endif /* ndef __symbian__ */
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@ -747,6 +747,66 @@ _Unwind_DeleteException (_Unwind_Exception * exc)
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}
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/* Perform stack backtrace through unwind data. */
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_Unwind_Reason_Code
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__gnu_Unwind_Backtrace(_Unwind_Trace_Fn trace, void * trace_argument,
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phase2_vrs * entry_vrs);
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_Unwind_Reason_Code
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__gnu_Unwind_Backtrace(_Unwind_Trace_Fn trace, void * trace_argument,
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phase2_vrs * entry_vrs)
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{
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phase1_vrs saved_vrs;
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_Unwind_Reason_Code code;
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_Unwind_Control_Block ucb;
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_Unwind_Control_Block *ucbp = &ucb;
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/* Set the pc to the call site. */
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entry_vrs->core.r[R_PC] = entry_vrs->core.r[R_LR];
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/* Save the core registers. */
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saved_vrs.core = entry_vrs->core;
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/* Set demand-save flags. */
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saved_vrs.demand_save_flags = ~(_uw) 0;
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do
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{
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/* Find the entry for this routine. */
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if (get_eit_entry (ucbp, saved_vrs.core.r[R_PC]) != _URC_OK)
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{
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code = _URC_FAILURE;
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break;
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}
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/* The dwarf unwinder assumes the context structure holds things
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like the function and LSDA pointers. The ARM implementation
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caches these in the exception header (UCB). To avoid
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rewriting everything we make the virtual IP register point at
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the UCB. */
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_Unwind_SetGR((_Unwind_Context *)&saved_vrs, 12, (_Unwind_Ptr) ucbp);
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/* Call trace function. */
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if ((*trace) ((_Unwind_Context *) &saved_vrs, trace_argument)
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!= _URC_NO_REASON)
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{
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code = _URC_FAILURE;
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break;
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}
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/* Call the pr to decide what to do. */
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code = ((personality_routine) UCB_PR_ADDR (ucbp))
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(_US_VIRTUAL_UNWIND_FRAME | _US_FORCE_UNWIND,
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ucbp, (void *) &saved_vrs);
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}
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while (code != _URC_END_OF_STACK
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&& code != _URC_FAILURE);
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finish:
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restore_non_core_regs (&saved_vrs);
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return code;
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}
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/* Common implementation for ARM ABI defined personality routines.
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ID is the index of the personality routine, other arguments are as defined
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by __aeabi_unwind_cpp_pr{0,1,2}. */
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@ -205,6 +205,13 @@ extern "C" {
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_Unwind_Control_Block *, struct _Unwind_Context *, void *);
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_Unwind_Reason_Code _Unwind_ForcedUnwind (_Unwind_Control_Block *,
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_Unwind_Stop_Fn, void *);
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/* @@@ Use unwind data to perform a stack backtrace. The trace callback
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is called for every stack frame in the call chain, but no cleanup
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actions are performed. */
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typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (_Unwind_Context *, void *);
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_Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn,
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void*);
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_Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
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void _Unwind_Complete(_Unwind_Control_Block *ucbp);
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void _Unwind_DeleteException (_Unwind_Exception *);
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