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type argument in FUNCTION_ARG macro
- From: BELBACHIR Selim <selim dot belbachir at fr dot thalesgroup dot com>
- To: "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
- Date: Fri, 4 May 2012 13:54:21 +0200
- Subject: type argument in FUNCTION_ARG macro
I'm working on an architecture where the calling convention depends on the type of the parameter (i.e. pointers are passed into $C regs and non-pointers are passed into $R regs). I've implemented this difference by using the POINTER_TYPE_P() macro on the 'type' argument of the FUNCTION_ARG macro.
I'm having a problem with this approach with calls to libgcc function like _Unwind_SjLj_Register(struct foo * ). As this function is invoked as a
library function, the 'type' argument to the FUNCTION_ARG() macro is NULL. Thus, the pointer parameter is not passed as pointer but the function body expects a pointer.
Any ideas on how to get around this problem?