sysdeps/powerpc/ifunc-sel.h

   1 /* Used by the elf ifunc tests.  */
   2 #ifndef ELF_IFUNC_SEL_H
   3 #define ELF_IFUNC_SEL_H 1
   4
   5 extern int global;
   6
   7 static inline void *
   8 inhibit_stack_protector
   9 ifunc_sel (int (*f1) (void), int (*f2) (void), int (*f3) (void))
  10 {
  11   register void *ret __asm__ ("r3");
  12   __asm__ ("mflr 12\n\t"
  13            "bcl 20,31,1f\n"
  14            "1:\tmflr 11\n\t"
  15            "mtlr 12\n\t"
  16            "addis 12,11,global-1b@ha\n\t"
  17            "lwz 12,global-1b@l(12)\n\t"
  18            "addis %0,11,%2-1b@ha\n\t"
  19            "addi %0,%0,%2-1b@l\n\t"
  20            "cmpwi 12,1\n\t"
  21            "beq 2f\n\t"
  22            "addis %0,11,%3-1b@ha\n\t"
  23            "addi %0,%0,%3-1b@l\n\t"
  24            "cmpwi 12,-1\n\t"
  25            "beq 2f\n\t"
  26            "addis %0,11,%4-1b@ha\n\t"
  27            "addi %0,%0,%4-1b@l\n\t"
  28            "2:"
  29            : "=r" (ret)
  30            : "i" (&global), "i" (f1), "i" (f2), "i" (f3)
  31            : "11", "12", "cr0");
  32   return ret;
  33 }
  34
  35 static inline void *
  36 inhibit_stack_protector
  37 ifunc_one (int (*f1) (void))
  38 {
  39   register void *ret __asm__ ("r3");
  40   __asm__ ("mflr 12\n\t"
  41            "bcl 20,31,1f\n"
  42            "1:\tmflr %0\n\t"
  43            "mtlr 12\n\t"
  44            "addis %0,%0,%1-1b@ha\n\t"
  45            "addi %0,%0,%1-1b@l"
  46            : "=r" (ret)
  47            : "i" (f1)
  48            : "12");
  49   return ret;
  50 }
  51 #endif