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16
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1
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2 int printf(char *, ...);
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3 typedef void (*RET_FUNC)(int, void *);
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4
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5 void g(RET_FUNC func)
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6 {
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7 func(33, 0);
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8 }
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9
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10 int f()
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11 {
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12 void *ret;
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13 ret = ({
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14 __label__ exit0;
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15 int retval;
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16 void __return_func(int retval_, void *fp){
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17 retval = retval_;
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18 goto exit0;
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19 }
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20 if (0) {
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21 exit0:
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22 printf("f2: fp = 0x%x\n", __builtin_frame_address(0));
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23 return retval;
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24 }
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25 __return_func;
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26 });
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27
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28 //g(__return_func, __builtin_frame_address(0));
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29 printf("f0: fp = 0x%x\n", __builtin_frame_address(0));
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30 printf("__return_func = %x\n", ret);
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31 g(ret);
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32
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33 printf("not good\n");
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34 return 0;
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35
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36 //exit0:
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37 //printf("f2: fp = 0x%x\n", __builtin_frame_address(0));
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38 //return retval;
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39 }
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40
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41 int main(int argc, char **argv)
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42 {
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43 int t;
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44 printf("main before: fp = 0x%x\n", __builtin_frame_address(0));
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45 t = f();
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46 printf("f = %d\n", t);
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47 printf("main after: fp = 0x%x\n", __builtin_frame_address(0));
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48 }
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49
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50
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