sysdeps/riscv/tls-macros.h

   1 /* Macros to support TLS testing in times of missing compiler support.
   2    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library.  If not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #include <sys/cdefs.h>
  22 #include <sys/asm.h>
  23 #include <sysdep.h>
  24 #include "dl-tls.h"
  25
  26 #define LOAD_GP                                         \
  27         ".option push\n\t"                              \
  28         ".option norelax\n\t"                           \
  29         "la gp, __global_pointer$\n\t"                  \
  30         ".option pop\n\t"
  31
  32 #define UNLOAD_GP
  33
  34 #define TLS_GD(x)                                       \
  35         ({ void *__result;                              \
  36         asm (LOAD_GP                                    \
  37              "la.tls.gd %0, " #x "\n\t"                 \
  38              UNLOAD_GP                                  \
  39              : "=r" (__result));                        \
  40         __tls_get_addr (__result); })
  41
  42 #define TLS_LD(x) TLS_GD(x)
  43
  44 #define TLS_IE(x)                                       \
  45         ({ void *__result;                              \
  46         asm (LOAD_GP                                    \
  47              "la.tls.ie %0, " #x "\n\t"                 \
  48              "add %0, %0, tp\n\t"                       \
  49              UNLOAD_GP                                  \
  50              : "=r" (__result));                        \
  51         __result; })
  52
  53 #define TLS_LE(x)                                       \
  54         ({ void *__result;                              \
  55         asm (LOAD_GP                                    \
  56              "lui %0, %%tprel_hi(" #x ")\n\t"           \
  57              "add %0, %0, tp, %%tprel_add(" #x ")\n\t"  \
  58              "addi %0, %0, %%tprel_lo(" #x ")\n\t"      \
  59              UNLOAD_GP                                  \
  60              : "=r" (__result));                        \
  61         __result; })