sysdeps/arm/tls-macros.h

   1 #include <sysdep.h>                     /* For ARCH_HAS_T2.  */
   2
   3 #ifdef __thumb2__
   4 # define ARM_PC_OFFSET "4"
   5 #else
   6 # define ARM_PC_OFFSET "8"
   7 #endif
   8
   9 /* Returns the address of data containing ".word SYMBOL(RELOC)".  */
  10 #if defined (ARCH_HAS_T2) && !defined (PIC)
  11 # define GET_SPECIAL_RELOC(symbol, reloc)                       \
  12   ({                                                            \
  13     int *__##symbol##_rodata;                                   \
  14     asm ("movw %0, #:lower16:1f\n"                              \
  15          "movt %0, #:upper16:1f\n"                              \
  16          ".pushsection .rodata.cst4, \"aM\", %%progbits, 4\n"   \
  17          ".balign 4\n"                                          \
  18          "1: .word " #symbol "(" #reloc ")\n"                   \
  19          ".popsection"                                          \
  20          : "=r" (__##symbol##_rodata));                         \
  21     __##symbol##_rodata;                                        \
  22   })
  23 #elif defined (ARCH_HAS_T2) && defined (PIC) && ARM_PCREL_MOVW_OK
  24 # define GET_SPECIAL_RELOC(symbol, reloc)                       \
  25   ({                                                            \
  26     int *__##symbol##_rodata;                                   \
  27     asm ("movw %0, #:lower16:1f - 2f - " ARM_PC_OFFSET "\n"     \
  28          "movt %0, #:upper16:1f - 2f - " ARM_PC_OFFSET "\n"     \
  29          ".pushsection .rodata.cst4, \"aM\", %%progbits, 4\n"   \
  30          ".balign 4\n"                                          \
  31          "1: .word " #symbol "(" #reloc ")\n"                   \
  32          ".popsection\n"                                        \
  33          "2: add %0, %0, pc"                                    \
  34          : "=r" (__##symbol##_rodata));                         \
  35     __##symbol##_rodata;                                        \
  36   })
  37 #else
  38 # define GET_SPECIAL_RELOC(symbol, reloc)                       \
  39   ({                                                            \
  40     int *__##symbol##_rodata;                                   \
  41     asm ("adr %0, 1f\n"                                         \
  42          "b 2f\n"                                               \
  43          ".balign 4\n"                                          \
  44          "1: .word " #symbol "(" #reloc ")\n"                   \
  45          "2:"                                                   \
  46          : "=r" (__##symbol##_rodata));                         \
  47     __##symbol##_rodata;                                        \
  48   })
  49 #endif
  50
  51 /* Returns the pointer value (SYMBOL(RELOC) + pc - PC_OFS).  */
  52 #define GET_SPECIAL_PCREL(symbol, reloc)                                \
  53   ({                                                                    \
  54     int *__##symbol##_rodata = GET_SPECIAL_RELOC (symbol, reloc);       \
  55     (void *) ((int) __##symbol##_rodata + *__##symbol##_rodata);        \
  56   })
  57
  58 #define TLS_LE(x)                                               \
  59   (__builtin_thread_pointer () + *GET_SPECIAL_RELOC (x, tpoff))
  60
  61 #define TLS_IE(x)                                               \
  62   ((int *) (__builtin_thread_pointer ()                         \
  63             + *(int *) GET_SPECIAL_PCREL (x, gottpoff)))
  64
  65 extern void *__tls_get_addr (void *);
  66
  67 #define TLS_LD(x)                                               \
  68   ((int *) (__tls_get_addr (GET_SPECIAL_PCREL (x, tlsldm))      \
  69             + *GET_SPECIAL_RELOC (x, tlsldo)))
  70
  71 #define TLS_GD(x)                                               \
  72   ((int *) __tls_get_addr (GET_SPECIAL_PCREL (x, tlsgd)))