Home | History | Annotate | Line # | Download | only in config 
      1 #include "libgcc_tm.h"
      2 
      3 /* This shim is special, it needs to be built for Mac OSX 10.6
      4    regardless of the current system version.
      5    We must also build it to use the unwinder layout that was
      6    present for 10.6 (and not update that).
      7    So we copy the referenced structures from unwind-dw2-fde.h
      8    to avoid pulling in newer system headers and/or changed
      9    layouts.  */
     10 struct dwarf_eh_bases
     11 {
     12   void *tbase;
     13   void *dbase;
     14   void *func;
     15 };
     16 
     17 typedef          int  sword __attribute__ ((mode (SI)));
     18 typedef unsigned int  uword __attribute__ ((mode (SI)));
     19 
     20 /* The first few fields of an FDE.  */
     21 struct dwarf_fde
     22 {
     23   uword length;
     24   sword CIE_delta;
     25   unsigned char pc_begin[];
     26 } __attribute__ ((packed, aligned (__alignof__ (void *))));
     27 
     28 typedef struct dwarf_fde fde;
     29 
     30 extern const fde * _Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
     31 
     32 void *
     33 _darwin10_Unwind_FindEnclosingFunction (void *pc)
     34 {
     35   struct dwarf_eh_bases bases;
     36   const struct dwarf_fde *fde = _Unwind_Find_FDE (pc-1, &bases);
     37   if (fde)
     38     return bases.func;
     39   return (void *) 0;
     40 }
     41