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 #elif defined __sh__
  99 # define TLS_LE(x) \
 100   ({ int *__l; void *__tp;                                                    \
 101      asm ("stc gbr,%1\n\t"                                                    \
 102           "mov.l 1f,%0\n\t"                                                   \
 103           "bra 2f\n\t"                                                        \
 104           " add %1,%0\n\t"                                                    \
 105           ".align 2\n\t"                                                      \
 106           "1: .long " #x "@tpoff\n\t"                                         \
 107           "2:"                                                                \
 108           : "=r" (__l), "=r" (__tp));                                         \
 109      __l; })
 110
 111 # define TLS_IE(x) \
 112   ({ int *__l; void *__tp;                                                    \
 113      asm ("mova 0f,r0\n\t"                                                    \
 114           "mov.l 0f,r12\n\t"                                                  \
 115           "add r0,r12\n\t"                                                    \
 116           "mov.l 1f,r0\n\t"                                                   \
 117           "stc gbr,%1\n\t"                                                    \
 118           "mov.l @(r0,r12),%0\n\t"                                            \
 119           "bra 2f\n\t"                                                        \
 120           " add %1,%0\n\t"                                                    \
 121           ".align 2\n\t"                                                      \
 122           "0: .long _GLOBAL_OFFSET_TABLE_\n\t"                                \
 123           "1: .long " #x "@gottpoff\n\t"                                      \
 124           "2:"                                                                \
 125           : "=r" (__l), "=r" (__tp) : : "r0", "r12");                         \
 126      __l; })
 127
 128 # define TLS_LD(x) \
 129   ({ int *__l;                                                                \
 130      asm ("mova 0f,r0\n\t"                                                    \
 131           "mov.l 0f,r12\n\t"                                                  \
 132           "add r0,r12\n\t"                                                    \
 133           "mov.l 1f,r4\n\t"                                                   \
 134           "add r12,r4\n\t"                                                    \
 135           "mova 2f,r0\n\t"                                                    \
 136           "mov.l 2f,r1\n\t"                                                   \
 137           "add r0,r1\n\t"                                                     \
 138           "jsr @r1\n\t"                                                       \
 139           " nop\n\t"                                                          \
 140           "mov.l 3f,%0\n\t"                                                   \
 141           "bra 4f\n\t"                                                        \
 142           " add r0,%0\n\t"                                                    \
 143           ".align 2\n\t"                                                      \
 144           "0: .long _GLOBAL_OFFSET_TABLE_\n\t"                                \
 145           "1: .long " #x "@tlsldm\n\t"                                        \
 146           "2: .long __tls_get_addr@plt\n\t"                                   \
 147           "3: .long " #x "@dtpoff\n\t"                                        \
 148           "4:"                                                                \
 149           : "=r" (__l) : : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",    \
 150                            "r12", "pr", "t");                                         \
 151      __l; })
 152
 153 # define TLS_GD(x) \
 154   ({ int *__l;                                                                \
 155      asm ("mova 0f,r0\n\t"                                                    \
 156           "mov.l 0f,r12\n\t"                                                  \
 157           "add r0,r12\n\t"                                                    \
 158           "mov.l 1f,r4\n\t"                                                   \
 159           "add r12,r4\n\t"                                                    \
 160           "mova 2f,r0\n\t"                                                    \
 161           "mov.l 2f,r1\n\t"                                                   \
 162           "add r0,r1\n\t"                                                     \
 163           "jsr @r1\n\t"                                                       \
 164           " nop\n\t"                                                          \
 165           "bra 3f\n\t"                                                        \
 166           " mov r0,%0\n\t"                                                    \
 167           ".align 2\n\t"                                                      \
 168           "0: .long _GLOBAL_OFFSET_TABLE_\n\t"                                \
 169           "1: .long " #x "@tlsgd\n\t"                                         \
 170           "2: .long __tls_get_addr@plt\n\t"                                   \
 171           "3:"                                                                \
 172           : "=r" (__l) : : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",    \
 173                            "r12", "pr", "t");                                         \
 174      __l; })
 175
 176 #else
 177 # error "No support for this architecture so far."
 178 #endif