elf/tls-macros.h

   1 /* Macros to support TLS testing in times of missing compiler support.  */
   2
   3 #define COMMON_INT_DEF(x) \
   4   asm (".tls_common " #x ",4,4")
   5 /* XXX Until we get compiler support we don't need declarations.  */
   6 #define COMMON_INT_DECL(x)
   7
   8 /* XXX This definition will probably be machine specific, too.  */
   9 #define VAR_INT_DEF(x) \
  10   asm (".section .tdata\n\t"                                                  \
  11        ".globl " #x "\n"                                                      \
  12        #x ":\t.long 0\n\t"                                                    \
  13        ".size " #x ",4\n\t"                                                   \
  14        ".previous")
  15 /* XXX Until we get compiler support we don't need declarations.  */
  16 #define VAR_INT_DECL(x)
  17
  18
  19   /* XXX Each architecture must have its own asm for now.  */
  20 #ifdef __i386__
  21 # define TLS_LE(x) \
  22   ({ int *__l;                                                                \
  23      asm ("movl %%gs:0,%0\n\t"                                                \
  24           "subl $" #x "@tpoff,%0"                                             \
  25           : "=r" (__l));                                                      \
  26      __l; })
  27
  28 # ifdef PIC
  29 #  define TLS_IE(x) \
  30   ({ int *__l;                                                                \
  31      asm ("movl %%gs:0,%0\n\t"                                                \
  32           "subl " #x "@gottpoff(%%ebx),%0"                                    \
  33           : "=r" (__l));                                                      \
  34      __l; })
  35 # else
  36 #  define TLS_IE(x) \
  37   ({ int *__l, __b;                                                           \
  38      asm ("call 1f\n\t"                                                       \
  39           ".subsection 1\n"                                                   \
  40           "1:\tmovl (%%esp), %%ebx\n\t"                                       \
  41           "ret\n\t"                                                           \
  42           ".previous\n\t"                                                     \
  43           "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t"                            \
  44           "movl %%gs:0,%0\n\t"                                                \
  45           "subl " #x "@gottpoff(%%ebx),%0"                                    \
  46           : "=r" (__l), "=&b" (__b));                                         \
  47      __l; })
  48 # endif
  49
  50 # ifdef PIC
  51 #  define TLS_LD(x) \
  52   ({ int *__l, __c, __d;                                                      \
  53      asm ("leal " #x "@tlsldm(%%ebx),%%eax\n\t"                               \
  54           "call ___tls_get_addr@plt\n\t"                                      \
  55           "leal " #x "@dtpoff(%%eax), %%eax"                                  \
  56           : "=a" (__l), "=&c" (__c), "=&d" (__d));                            \
  57      __l; })
  58 # else
  59 #  define TLS_LD(x) \
  60   ({ int *__l, __b, __c, __d;                                                 \
  61      asm ("call 1f\n\t"                                                       \
  62           ".subsection 1\n"                                                   \
  63           "1:\tmovl (%%esp), %%ebx\n\t"                                       \
  64           "ret\n\t"                                                           \
  65           ".previous\n\t"                                                     \
  66           "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t"                            \
  67           "leal " #x "@tlsldm(%%ebx),%%eax\n\t"                               \
  68           "call ___tls_get_addr@plt\n\t"                                      \
  69           "leal " #x "@dtpoff(%%eax), %%eax"                                  \
  70           : "=a" (__l), "=&b" (__b), "=&c" (__c), "=&d" (__d));               \
  71      __l; })
  72 # endif
  73
  74 # ifdef PIC
  75 #  define TLS_GD(x) \
  76   ({ int *__l, __c, __d;                                                      \
  77      asm ("leal " #x "@tlsgd(%%ebx),%%eax\n\t"                                \
  78           "call ___tls_get_addr@plt\n\t"                                      \
  79           "nop"                                                               \
  80           : "=a" (__l), "=&c" (__c), "=&d" (__d));                            \
  81      __l; })
  82 # else
  83 #  define TLS_GD(x) \
  84   ({ int *__l, __b, __c, __d;                                                 \
  85      asm ("call 1f\n\t"                                                       \
  86           ".subsection 1\n"                                                   \
  87           "1:\tmovl (%%esp), %%ebx\n\t"                                       \
  88           "ret\n\t"                                                           \
  89           ".previous\n\t"                                                     \
  90           "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t"                            \
  91           "leal " #x "@tlsgd(%%ebx),%%eax\n\t"                                \
  92           "call ___tls_get_addr@plt\n\t"                                      \
  93           "nop"                                                               \
  94           : "=a" (__l), "=&b" (__b), "=&c" (__c), "=&d" (__d));               \
  95      __l; })
  96 # endif
  97
  98 #else
  99 # error "No support for this architecture so far."
 100 #endif