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python3.2  3.2.2
Typedefs | Functions
closure_stdcall.c File Reference
#include "ffitest.h"

Go to the source code of this file.

Typedefs

typedef int(__stdcallclosure_test_type0 )(int, int, int, int)

Functions

static void closure_test_stdcall (ffi_cif *cif __UNUSED__, void *resp, void **args, void *userdata)
int main (void)

Typedef Documentation

Definition at line 26 of file closure_stdcall.c.


Function Documentation

static void closure_test_stdcall ( ffi_cif *cif  __UNUSED__,
void resp,
void **  args,
void userdata 
) [static]

Definition at line 11 of file closure_stdcall.c.

{
  *(ffi_arg*)resp =
    (int)*(int *)args[0] + (int)(*(int *)args[1])
    + (int)(*(int *)args[2])  + (int)(*(int *)args[3])
    + (int)(intptr_t)userdata;

  printf("%d %d %d %d: %d\n",
        (int)*(int *)args[0], (int)(*(int *)args[1]),
        (int)(*(int *)args[2]), (int)(*(int *)args[3]),
         (int)*(ffi_arg *)resp);

}

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int main ( void  )

Definition at line 28 of file closure_stdcall.c.

{
  ffi_cif cif;
  void *code;
  ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  ffi_type * cl_arg_types[17];
  int res;
  void* sp_pre;
  void* sp_post;
  char buf[1024];

  cl_arg_types[0] = &ffi_type_uint;
  cl_arg_types[1] = &ffi_type_uint;
  cl_arg_types[2] = &ffi_type_uint;
  cl_arg_types[3] = &ffi_type_uint;
  cl_arg_types[4] = NULL;

  /* Initialize the cif */
  CHECK(ffi_prep_cif(&cif, FFI_STDCALL, 4,
                   &ffi_type_sint, cl_arg_types) == FFI_OK);

  CHECK(ffi_prep_closure_loc(pcl, &cif, closure_test_stdcall,
                             (void *) 3 /* userdata */, code) == FFI_OK);

  asm volatile (" movl %%esp,%0" : "=g" (sp_pre));
  res = (*(closure_test_type0)code)(0, 1, 2, 3);
  asm volatile (" movl %%esp,%0" : "=g" (sp_post));
  /* { dg-output "0 1 2 3: 9" } */

  printf("res: %d\n",res);
  /* { dg-output "\nres: 9" } */

  sprintf(buf, "mismatch: pre=%p vs post=%p", sp_pre, sp_post);
  printf("stack pointer %s\n", (sp_pre == sp_post ? "match" : buf));
  /* { dg-output "\nstack pointer match" } */
  exit(0);
}

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