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16
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1
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2 typedef void (*RET_FUNC)(int, void *);
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3
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4 int main(int argc, char **argv)
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5 {
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6 int r;
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7 r = f();
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8 printf("%d\n", r);
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9 }
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10
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11 //void z(RET_FUNC ret, void *fp)
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12 __code z(RET_FUNC ret, void *fp)
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13 {
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14 printf("z: fp=0x%x\n", __builtin_frame_address(0));
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15 ret(5, fp);
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16 }
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17 __code i(RET_FUNC ret, void *fp)
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18 {
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19 printf("i: fp=0x%x\n", __builtin_frame_address(0));
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20 goto z(ret, fp);
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21 }
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22 __code h(RET_FUNC ret, void *fp)
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23 {
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24 printf("h: fp=0x%x\n", __builtin_frame_address(0));
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25 goto i(ret, fp);
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26 }
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27 __code g(RET_FUNC ret, void *fp)
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28 {
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29 printf("g: fp=0x%x\n", __builtin_frame_address(0));
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30 goto h(ret, fp);
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31 }
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32
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33 int f()
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34 {
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35 __label__ exit0;
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36 int retval;
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37 //void (*ret)(int retval_, void *fp);
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38
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39 /*
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40 ret = ({
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41 void __return_func(int retval_, void *fp){
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42 retval = retval_;
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43 goto exit0;
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44 }
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45 __return_func;
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46 });
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47 */
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48 printf("f0: fp = 0x%x\n", __builtin_frame_address(0));
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49 void __return_func(int retval_, void *fp){
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50 retval = retval_;
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51 goto exit0;
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52 }
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53 //ret = __return_func;
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54
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55 printf("f1: fp = 0x%x\n", __builtin_frame_address(0));
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56
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57 //g(__return_func, __builtin_frame_address(0));
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58 goto g(__return_func, __builtin_frame_address(0));
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59
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60 printf("bad\n");
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61
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62 exit0:
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63 printf("f2: fp = 0x%x\n", __builtin_frame_address(0));
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64 return retval;
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65 }
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66
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67
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68
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