github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_pointer.c (about)

     1  /* Area:		ffi_call, closure_call
     2     Purpose:		Check pointer arguments.
     3     Limitations:	none.
     4     PR:			none.
     5     Originator:	Blake Chaffin 6/6/2007	*/
     6  
     7  /* { dg-do run { xfail strongarm*-*-* xscale*-*-* } } */
     8  #include "ffitest.h"
     9  
    10  void* cls_pointer_fn(void* a1, void* a2)
    11  {
    12  	void*	result	= (void*)((intptr_t)a1 + (intptr_t)a2);
    13  
    14  	printf("0x%08x 0x%08x: 0x%08x\n", 
    15  	       (unsigned int)(uintptr_t) a1,
    16                 (unsigned int)(uintptr_t) a2,
    17                 (unsigned int)(uintptr_t) result);
    18  
    19  	return result;
    20  }
    21  
    22  static void
    23  cls_pointer_gn(ffi_cif* cif __UNUSED__, void* resp, 
    24  	       void** args, void* userdata __UNUSED__)
    25  {
    26  	void*	a1	= *(void**)(args[0]);
    27  	void*	a2	= *(void**)(args[1]);
    28  
    29  	*(void**)resp = cls_pointer_fn(a1, a2);
    30  }
    31  
    32  int main (void)
    33  {
    34  	ffi_cif	cif;
    35          void *code;
    36  	ffi_closure*	pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    37  	void*			args[3];
    38  	/*	ffi_type		cls_pointer_type; */
    39  	ffi_type*		arg_types[3];
    40  
    41  /*	cls_pointer_type.size = sizeof(void*);
    42  	cls_pointer_type.alignment = 0;
    43  	cls_pointer_type.type = FFI_TYPE_POINTER;
    44  	cls_pointer_type.elements = NULL;*/
    45  
    46  	void*	arg1	= (void*)0x12345678;
    47  	void*	arg2	= (void*)0x89abcdef;
    48  	ffi_arg	res		= 0;
    49  
    50  	arg_types[0] = &ffi_type_pointer;
    51  	arg_types[1] = &ffi_type_pointer;
    52  	arg_types[2] = NULL;
    53  
    54  	CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &ffi_type_pointer,
    55  		arg_types) == FFI_OK);
    56  
    57  	args[0] = &arg1;
    58  	args[1] = &arg2;
    59  	args[2] = NULL;
    60  
    61  	ffi_call(&cif, FFI_FN(cls_pointer_fn), &res, args);
    62  	/* { dg-output "0x12345678 0x89abcdef: 0x9be02467" } */
    63  	printf("res: 0x%08x\n", (unsigned int) res);
    64  	/* { dg-output "\nres: 0x9be02467" } */
    65  
    66  	CHECK(ffi_prep_closure_loc(pcl, &cif, cls_pointer_gn, NULL, code) == FFI_OK);
    67  
    68  	res = (ffi_arg)(uintptr_t)((void*(*)(void*, void*))(code))(arg1, arg2);
    69  	/* { dg-output "\n0x12345678 0x89abcdef: 0x9be02467" } */
    70  	printf("res: 0x%08x\n", (unsigned int) res);
    71  	/* { dg-output "\nres: 0x9be02467" } */
    72  
    73  	exit(0);
    74  }