> like above the control from "_ZThn8_N12Intermediate1vEv" (support
> function for this pointer update) is transferred
> "_ZN12Intermediate1vEv" by b inst (where its not updating the r12)
> and in the beginning of "_ZN12Intermediate1vEv" we are loading the
> toc base from r12 (which is incorrect ) ,we are investigating the
> issue and one way to fix the issue is that make THUNK to update the
> r12 ,the cal like bctrl or load the r12 with the function address in
> the _ZN12Intermediate1vEv prologue code .
Is that on VxWorks in kernel mode? If so, the loader doesn't abide by the
ELFv2 ABI so the simple way out is to disable asm thunks altogether:
#undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
#define TARGET_ASM_CAN_OUTPUT_MI_THUNK rs6000_can_output_mi_thunk
/* Return true if rs6000_output_mi_thunk would be able to output the
assembler code for the thunk function specified by the arguments
it is passed, and false otherwise. */
static bool
rs6000_can_output_mi_thunk (const_tree, HOST_WIDE_INT, HOST_WIDE_INT,
const_tree)
{
/* The only possible issue is for VxWorks in kernel mode. */
if (!TARGET_VXWORKS || TARGET_VXWORKS_RTP)
return true;
/* The loader neither creates the glue code sequence that loads r12 nor uses
the local entry point for the sibcall's target in the ELFv2 ABI. */
return DEFAULT_ABI != ABI_ELFv2;
}
--
Eric Botcazou
