diff options
Diffstat (limited to 'libgcc/config')
| -rw-r--r-- | libgcc/config/rs6000/linux-unwind.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/libgcc/config/rs6000/linux-unwind.h b/libgcc/config/rs6000/linux-unwind.h index 48009251fbc..20116326c3c 100644 --- a/libgcc/config/rs6000/linux-unwind.h +++ b/libgcc/config/rs6000/linux-unwind.h @@ -354,20 +354,22 @@ frob_update_context (struct _Unwind_Context *context, _Unwind_FrameState *fs ATT /* We are in a plt call stub or r2 adjusting long branch stub, before r2 has been saved. Keep REG_UNSAVED. */ } - else if (pc[0] == 0x4E800421 - && pc[1] == 0xE8410028) - { - /* We are at the bctrl instruction in a call via function - pointer. gcc always emits the load of the new r2 just - before the bctrl. */ - _Unwind_SetGRPtr (context, 2, context->cfa + 40); - } else { unsigned int *insn = (unsigned int *) _Unwind_GetGR (context, R_LR); if (insn && *insn == 0xE8410028) _Unwind_SetGRPtr (context, 2, context->cfa + 40); + else if (pc[0] == 0x4E800421 + && pc[1] == 0xE8410028) + { + /* We are at the bctrl instruction in a call via function + pointer. gcc always emits the load of the new R2 just + before the bctrl so this is the first and only place + we need to use the stored R2. */ + _Unwind_Word sp = _Unwind_GetGR (context, 1); + _Unwind_SetGRPtr (context, 2, sp + 40); + } } } #endif |