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1 /* Area:		ffi_call, closure_call
2    Purpose:		Check pointer arguments across multiple hideous stack frames.
3    Limitations:	none.
4    PR:			none.
5    Originator:	Blake Chaffin 6/7/2007	*/
6 
7 /* { dg-do run { xfail strongarm*-*-* xscale*-*-* } } */
8 #include "ffitest.h"
9 
10 static	long dummyVar;
11 
dummy_func(long double a1,char b1,long double a2,char b2,long double a3,char b3,long double a4,char b4)12 long dummy_func(
13 	long double a1, char b1,
14 	long double a2, char b2,
15 	long double a3, char b3,
16 	long double a4, char b4)
17 {
18 	return a1 + b1 + a2 + b2 + a3 + b3 + a4 + b4;
19 }
20 
cls_pointer_fn2(void * a1,void * a2)21 void* cls_pointer_fn2(void* a1, void* a2)
22 {
23 	long double	trample1	= (intptr_t)a1 + (intptr_t)a2;
24 	char		trample2	= ((char*)&a1)[0] + ((char*)&a2)[0];
25 	long double	trample3	= (intptr_t)trample1 + (intptr_t)a1;
26 	char		trample4	= trample2 + ((char*)&a1)[1];
27 	long double	trample5	= (intptr_t)trample3 + (intptr_t)a2;
28 	char		trample6	= trample4 + ((char*)&a2)[1];
29 	long double	trample7	= (intptr_t)trample5 + (intptr_t)trample1;
30 	char		trample8	= trample6 + trample2;
31 	void*		result;
32 
33 	dummyVar	= dummy_func(trample1, trample2, trample3, trample4,
34 		trample5, trample6, trample7, trample8);
35 
36 	result	= (void*)((intptr_t)a1 + (intptr_t)a2);
37 
38 	printf("0x%08x 0x%08x: 0x%08x\n",
39 	       (unsigned int)(uintptr_t) a1,
40                (unsigned int)(uintptr_t) a2,
41                (unsigned int)(uintptr_t) result);
42 
43 	return result;
44 }
45 
cls_pointer_fn1(void * a1,void * a2)46 void* cls_pointer_fn1(void* a1, void* a2)
47 {
48 	long double	trample1	= (intptr_t)a1 + (intptr_t)a2;
49 	char		trample2	= ((char*)&a1)[0] + ((char*)&a2)[0];
50 	long double	trample3	= (intptr_t)trample1 + (intptr_t)a1;
51 	char		trample4	= trample2 + ((char*)&a1)[1];
52 	long double	trample5	= (intptr_t)trample3 + (intptr_t)a2;
53 	char		trample6	= trample4 + ((char*)&a2)[1];
54 	long double	trample7	= (intptr_t)trample5 + (intptr_t)trample1;
55 	char		trample8	= trample6 + trample2;
56 	void*		result;
57 
58 	dummyVar	= dummy_func(trample1, trample2, trample3, trample4,
59 		trample5, trample6, trample7, trample8);
60 
61 	result	= (void*)((intptr_t)a1 + (intptr_t)a2);
62 
63 	printf("0x%08x 0x%08x: 0x%08x\n",
64                (unsigned int)(intptr_t) a1,
65                (unsigned int)(intptr_t) a2,
66                (unsigned int)(intptr_t) result);
67 
68 	result	= cls_pointer_fn2(result, a1);
69 
70 	return result;
71 }
72 
73 static void
cls_pointer_gn(ffi_cif * cif __UNUSED__,void * resp,void ** args,void * userdata __UNUSED__)74 cls_pointer_gn(ffi_cif* cif __UNUSED__, void* resp,
75 	       void** args, void* userdata __UNUSED__)
76 {
77 	void*	a1	= *(void**)(args[0]);
78 	void*	a2	= *(void**)(args[1]);
79 
80 	long double	trample1	= (intptr_t)a1 + (intptr_t)a2;
81 	char		trample2	= ((char*)&a1)[0] + ((char*)&a2)[0];
82 	long double	trample3	= (intptr_t)trample1 + (intptr_t)a1;
83 	char		trample4	= trample2 + ((char*)&a1)[1];
84 	long double	trample5	= (intptr_t)trample3 + (intptr_t)a2;
85 	char		trample6	= trample4 + ((char*)&a2)[1];
86 	long double	trample7	= (intptr_t)trample5 + (intptr_t)trample1;
87 	char		trample8	= trample6 + trample2;
88 
89 	dummyVar	= dummy_func(trample1, trample2, trample3, trample4,
90 		trample5, trample6, trample7, trample8);
91 
92 	*(void**)resp = cls_pointer_fn1(a1, a2);
93 }
94 
main(void)95 int main (void)
96 {
97 	ffi_cif	cif;
98         void *code;
99 	ffi_closure*	pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
100 	void*			args[3];
101 	/*	ffi_type		cls_pointer_type; */
102 	ffi_type*		arg_types[3];
103 
104 /*	cls_pointer_type.size = sizeof(void*);
105 	cls_pointer_type.alignment = 0;
106 	cls_pointer_type.type = FFI_TYPE_POINTER;
107 	cls_pointer_type.elements = NULL;*/
108 
109 	void*	arg1	= (void*)0x01234567;
110 	void*	arg2	= (void*)0x89abcdef;
111 	ffi_arg	res		= 0;
112 
113 	arg_types[0] = &ffi_type_pointer;
114 	arg_types[1] = &ffi_type_pointer;
115 	arg_types[2] = NULL;
116 
117 	CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &ffi_type_pointer,
118 		arg_types) == FFI_OK);
119 
120 	args[0] = &arg1;
121 	args[1] = &arg2;
122 	args[2] = NULL;
123 
124 	printf("\n");
125 	ffi_call(&cif, FFI_FN(cls_pointer_fn1), &res, args);
126 
127 	printf("res: 0x%08x\n", (unsigned int) res);
128 	/* { dg-output "\n0x01234567 0x89abcdef: 0x8acf1356" } */
129 	/* { dg-output "\n0x8acf1356 0x01234567: 0x8bf258bd" } */
130 	/* { dg-output "\nres: 0x8bf258bd" } */
131 
132 	CHECK(ffi_prep_closure_loc(pcl, &cif, cls_pointer_gn, NULL, code) == FFI_OK);
133 
134 	res = (ffi_arg)(uintptr_t)((void*(*)(void*, void*))(code))(arg1, arg2);
135 
136 	printf("res: 0x%08x\n", (unsigned int) res);
137 	/* { dg-output "\n0x01234567 0x89abcdef: 0x8acf1356" } */
138 	/* { dg-output "\n0x8acf1356 0x01234567: 0x8bf258bd" } */
139 	/* { dg-output "\nres: 0x8bf258bd" } */
140 
141 	exit(0);
142 }
143