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16
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1 #include<stdio.h>
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2
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3 #if 0
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4 typedef float testtype;
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5 testtype good = 33.3f;
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6 testtype bad = 0.0f;
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7 void print_testtype(testtype t)
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8 {
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9 printf("return value = %2.3f good=%2.3f,bad=%2.3f\n", t,good,bad);
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10 }
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11 #elif 1
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12 typedef char testtype;
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13 testtype good = 33;
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14 testtype bad = 0;
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15 void print_testtype(testtype t)
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16 {
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17 printf("return value = %d, good=%d,bad=%d\n", t,good,bad);
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18 }
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19 #elif 0
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20 typedef double testtype;
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21 testtype good = 333.3;
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22 testtype bad = 0.00;
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23 void print_testtype(testtype t)
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24 {
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25 printf("return value = %3.3lf, good=%3.3lf,bad=%3.3lf\n", t,good,bad);
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26 }
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27 #elif 0
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28 typedef
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29 struct {
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30 int a;
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31 float b;
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32 int c[4];
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33 } testtype;
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34 testtype good = {33, 33.3, {4,4,4,4}};
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35 testtype bad = {0, 00.0, {0,0,0,0}};
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36 void print_testtype(testtype t)
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37 {
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38 printf( "return value = {\n"
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39 " a = %d\n"
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40 " b = %2.3f\n"
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41 " c = { %d, %d, %d, %d }"
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42 "}\n", t.a, t.b,
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43 t.c[0],t.c[1],t.c[2],t.c[3]);
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44 }
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45 #else
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46 typedef int testtype;
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47 testtype good = 33;
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48 testtype bad = 0;
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49 void print_testtype(testtype t)
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50 {
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51 printf("return value = %d, good=%d,bad=%d\n", t,good,bad);
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52 }
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53 #endif
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54
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55 typedef void (*RET_FUNC)(testtype, void *);
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56
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57 void g(RET_FUNC func)
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58 {
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59 func(good, NULL);
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60 }
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61
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62 testtype f_cbc()
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63 {
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64 //__label__ _cbc_exit0;
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65 //int retval;
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66 void *ret;
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67
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68 ret = _CbC_return;
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69
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70 printf("f0: fp = %p\n", __builtin_frame_address(0));
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71 printf("__return_func = %p\n", ret);
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72 g(ret);
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73
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74 printf("not good\n");
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75 return bad;
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76 //_cbc_exit0:
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77 //printf("f1: fp = 0x%x\n", __builtin_frame_address(0));
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78 //return retval;
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79 }
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80
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81 int main(int argc, char **argv)
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82 {
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83 testtype t;
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84 printf("main before: fp = %p\n", __builtin_frame_address(0));
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85 t = f_cbc();
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86 print_testtype(t);
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87 printf("main after: fp = %p\n", __builtin_frame_address(0));
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88 }
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89
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