sysdeps/mips/tls-macros.h

   1 /* Macros to support TLS testing in times of missing compiler support.  */
   2
   3 #include <sys/cdefs.h>
   4 #include <sys/asm.h>
   5
   6 #define __STRING2(X) __STRING(X)
   7 #define ADDU __STRING2(PTR_ADDU)
   8 #define ADDIU __STRING2(PTR_ADDIU)
   9 #define LW __STRING2(PTR_L)
  10
  11 /* Load the GOT pointer, which may not be in $28 in a non-PIC
  12    (abicalls pic0) function.  */
  13 #ifndef __PIC__
  14 # if _MIPS_SIM != _ABI64
  15 #  ifndef __mips16
  16 #   define LOAD_GP "move %[tmp], $28\n\tla $28, __gnu_local_gp\n\t"
  17 #  else
  18 #   define LOAD_GP                                      \
  19            "li %[tmp], %%hi(__gnu_local_gp)\n\t"        \
  20            "sll %[tmp], 16\n\t"                         \
  21            "addiu %[tmp], %%lo(__gnu_local_gp)\n\t"
  22 #  endif
  23 # else
  24 #  define LOAD_GP "move %[tmp], $28\n\tdla $28, __gnu_local_gp\n\t"
  25 # endif
  26 # define UNLOAD_GP "\n\tmove $28, %[tmp]"
  27 #else
  28 /* MIPS16 (re)creates the GP value using PC-relative instructions.  */
  29 # ifdef __mips16
  30 #  define LOAD_GP                                       \
  31            "li %[tmp], %%hi(_gp_disp)\n\t"              \
  32            "addiu %0, $pc, %%lo(_gp_disp)\n\t"          \
  33            "sll %[tmp], 16\n\t"                         \
  34            "addu %[tmp], %0\n\t"
  35 # else
  36 #  define LOAD_GP
  37 # endif
  38 # define UNLOAD_GP
  39 #endif
  40
  41 #ifndef __mips16
  42 # define TLS_GD(x)                                      \
  43   ({ void *__result, *__tmp;                            \
  44      extern void *__tls_get_addr (void *);              \
  45      asm (LOAD_GP ADDIU " %0, $28, %%tlsgd(" #x ")"     \
  46           UNLOAD_GP                                     \
  47           : "=r" (__result), [tmp] "=&r" (__tmp));      \
  48      (int *)__tls_get_addr (__result); })
  49 # define TLS_LD(x)                                      \
  50   ({ void *__result, *__tmp;                            \
  51      extern void *__tls_get_addr (void *);              \
  52      asm (LOAD_GP ADDIU " %0, $28, %%tlsldm(" #x ")"    \
  53           UNLOAD_GP                                     \
  54           : "=r" (__result), [tmp] "=&r" (__tmp));      \
  55      __result = __tls_get_addr (__result);              \
  56      asm ("lui $3,%%dtprel_hi(" #x ")\n\t"              \
  57           "addiu $3,$3,%%dtprel_lo(" #x ")\n\t"         \
  58           ADDU " %0,%0,$3"                              \
  59           : "+r" (__result) : : "$3");                  \
  60      __result; })
  61 # define TLS_IE(x)                                      \
  62   ({ void *__result, *__tmp;                            \
  63      asm (".set push\n\t.set mips32r2\n\t"              \
  64           "rdhwr\t%0,$29\n\t.set pop"                   \
  65           : "=v" (__result));                           \
  66      asm (LOAD_GP LW " $3,%%gottprel(" #x ")($28)\n\t"  \
  67           ADDU " %0,%0,$3"                              \
  68           UNLOAD_GP                                     \
  69           : "+r" (__result), [tmp] "=&r" (__tmp)        \
  70           : : "$3");                                    \
  71      __result; })
  72 # define TLS_LE(x)                                      \
  73   ({ void *__result;                                    \
  74      asm (".set push\n\t.set mips32r2\n\t"              \
  75           "rdhwr\t%0,$29\n\t.set pop"                   \
  76           : "=v" (__result));                           \
  77      asm ("lui $3,%%tprel_hi(" #x ")\n\t"               \
  78           "addiu $3,$3,%%tprel_lo(" #x ")\n\t"          \
  79           ADDU " %0,%0,$3"                              \
  80           : "+r" (__result) : : "$3");                  \
  81      __result; })
  82
  83 #else /* __mips16 */
  84 /* MIPS16 version.  */
  85 # define TLS_GD(x)                                      \
  86   ({ void *__result, *__tmp;                            \
  87      extern void *__tls_get_addr (void *);              \
  88      asm (LOAD_GP ADDIU " %1, %%tlsgd(" #x ")"          \
  89           "\n\tmove %0, %1"                             \
  90           : "=d" (__result), [tmp] "=&d" (__tmp));      \
  91      (int *) __tls_get_addr (__result); })
  92 # define TLS_LD(x)                                      \
  93   ({ void *__result, *__tmp;                            \
  94      extern void *__tls_get_addr (void *);              \
  95      asm (LOAD_GP ADDIU " %1, %%tlsldm(" #x ")"         \
  96           "\n\tmove %0, %1"                             \
  97           : "=d" (__result), [tmp] "=&d" (__tmp));      \
  98      __result = __tls_get_addr (__result);              \
  99      asm ("li $3,%%dtprel_hi(" #x ")\n\t"               \
 100           "sll $3,16\n\t"                               \
 101           "addiu $3,%%dtprel_lo(" #x ")\n\t"            \
 102           ADDU " %0,%0,$3"                              \
 103           : "+d" (__result) : : "$3");                  \
 104      __result; })
 105 # define TLS_IE(x)                                      \
 106   ({ void *__result, *__tmp, *__tp;                     \
 107      __tp = __builtin_thread_pointer ();                \
 108      asm (LOAD_GP LW " $3,%%gottprel(" #x ")(%1)\n\t"   \
 109           ADDU " %0,%[tp],$3"                           \
 110           : "=&d" (__result), [tmp] "=&d" (__tmp)       \
 111           : [tp] "d" (__tp) : "$3");                    \
 112      __result; })
 113 # define TLS_LE(x)                                      \
 114   ({ void *__result, *__tp;                             \
 115      __tp = __builtin_thread_pointer ();                \
 116      asm ("li $3,%%tprel_hi(" #x ")\n\t"                \
 117           "sll $3,16\n\t"                               \
 118           "addiu $3,%%tprel_lo(" #x ")\n\t"             \
 119           ADDU " %0,%[tp],$3"                           \
 120           : "=d" (__result) : [tp] "d" (__tp) : "$3");  \
 121      __result; })
 122
 123 #endif /* __mips16 */