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* unwind-dw2.c (SIGNAL_FRAME_BIT, EXTENDED_CONTEXT_BIT): Define. (struct _Unwind_Context): Rename args_size to flags, remove signal_frame field, add a new args_size field and version field. (_Unwind_IsSignalFrame, _Unwind_SetSignalFrame, _Unwind_IsExtendedContext): New inline functions. (_Unwind_GetGR, _Unwind_SetGR, _Unwind_GetGRPtr, _Unwind_SetGRPtr): Assume by_value array is only present if _Unwind_IsExtendedContext. (_Unwind_GetIPInfo, execute_cfa_program, uw_frame_state_for): Use _Unwind_IsSignalFrame. (__frame_state_for): Initialize context.flags to EXTENDED_CONTEXT_BIT. (uw_update_context_1): Use _Unwind_SetSignalFrame. (uw_init_context_1): Initialize context->flags to EXTENDED_CONTEXT_BIT. * config/rs6000/linux-unwind.h (frob_update_context): Use _Unwind_SetSignalFrame. From-SVN: r120406
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