1 
2 # define __ASM_FORM(x)  " " #x " "
3 # define JUMP_LABEL_INITIAL_NOP ".byte 0xe9 \n\t .long 0\n\t"
4 # define __ASM_SEL(a,b) __ASM_FORM(b)
5 #define _ASM_PTR        __ASM_SEL(.long, .quad)
6 
7 # define JUMP_LABEL(key, label)                                 \
8        do {                                                    \
9                asm goto("1:"                                   \
10                        JUMP_LABEL_INITIAL_NOP                  \
11                        ".pushsection __jump_table,  \"a\" \n\t"\
12                        _ASM_PTR "1b, %l[" #label "], %c0 \n\t" \
13                        ".popsection \n\t"                      \
14                        : :  "i" (key) :  : label);             \
15        } while (0)
16 
main(int argc,char * argv[])17 int main(int argc, char *argv[])
18 {
19        JUMP_LABEL("1", do_trace );
20        return 1;
21 do_trace:
22        return 0;
23 }
24 
25 /*
26  *  check-name: Asm with goto labels.
27  */
28 
29