libffi/testsuite/libffi.call/closure_stdcall.c

   1 /* Area:        closure_call (stdcall convention)
   2    Purpose:     Check handling when caller expects stdcall callee
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  <twalljava@dev.java.net> */
   6
   7 /* { dg-do run { target i?86-*-cygwin* i?86-*-mingw* } } */
   8 #include "ffitest.h"
   9
  10 static void
  11 closure_test_stdcall(ffi_cif* cif __UNUSED__, void* resp, void** args,
  12                  void* userdata)
  13 {
  14   *(ffi_arg*)resp =
  15     (int)*(int *)args[0] + (int)(*(int *)args[1])
  16     + (int)(*(int *)args[2])  + (int)(*(int *)args[3])
  17     + (int)(intptr_t)userdata;
  18
  19   printf("%d %d %d %d: %d\n",
  20          (int)*(int *)args[0], (int)(*(int *)args[1]),
  21          (int)(*(int *)args[2]), (int)(*(int *)args[3]),
  22          (int)*(ffi_arg *)resp);
  23
  24 }
  25
  26 typedef int (__stdcall *closure_test_type0)(int, int, int, int);
  27
  28 int main (void)
  29 {
  30   ffi_cif cif;
  31   void *code;
  32   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  33   ffi_type * cl_arg_types[17];
  34   int res;
  35   void* sp_pre;
  36   void* sp_post;
  37   char buf[1024];
  38
  39   cl_arg_types[0] = &ffi_type_uint;
  40   cl_arg_types[1] = &ffi_type_uint;
  41   cl_arg_types[2] = &ffi_type_uint;
  42   cl_arg_types[3] = &ffi_type_uint;
  43   cl_arg_types[4] = NULL;
  44
  45   /* Initialize the cif */
  46   CHECK(ffi_prep_cif(&cif, FFI_STDCALL, 4,
  47                      &ffi_type_sint, cl_arg_types) == FFI_OK);
  48
  49   CHECK(ffi_prep_closure_loc(pcl, &cif, closure_test_stdcall,
  50                              (void *) 3 /* userdata */, code) == FFI_OK);
  51
  52   asm volatile (" movl %%esp,%0" : "=g" (sp_pre));
  53   res = (*(closure_test_type0)code)(0, 1, 2, 3);
  54   asm volatile (" movl %%esp,%0" : "=g" (sp_post));
  55   /* { dg-output "0 1 2 3: 9" } */
  56
  57   printf("res: %d\n",res);
  58   /* { dg-output "\nres: 9" } */
  59
  60   sprintf(buf, "mismatch: pre=%p vs post=%p", sp_pre, sp_post);
  61   printf("stack pointer %s\n", (sp_pre == sp_post ? "match" : buf));
  62   /* { dg-output "\nstack pointer match" } */
  63   exit(0);
  64 }