validation/asm-empty-clobber.c

   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
  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