sysdeps/arm/nacl/sysdep.h

   1 /* Assembler macros for ARM/NaCl.
   2    Copyright (C) 2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _ARM_NACL_SYSDEP_H
  20 #define _ARM_NACL_SYSDEP_H      1
  21
  22 #ifdef __ASSEMBLER__
  23
  24 # ifndef NO_THUMB
  25 #  define NO_THUMB
  26 # endif
  27 # define ARM_SFI_MACROS         1
  28
  29 /* The compiler driver primes the assembler with a standard set of
  30    macros that includes sfi_breg and sfi_sp.  The sfi_pld macro is
  31    redundant with sfi_breg, but libc code uses it so as not to run
  32    afoul of the assembler's parsing bug in versions prior to 2.23.2.
  33    NaCl never uses an assembler that has this bug.  */
  34
  35 .macro sfi_pld basereg, offset=#0
  36         sfi_breg \basereg, pld [\basereg, \offset]
  37 .endm
  38
  39 #endif
  40
  41 #include <sysdeps/arm/sysdep.h>
  42
  43 #ifdef  __ASSEMBLER__
  44
  45 # undef eabi_fnstart
  46 # define eabi_fnstart
  47 # undef eabi_fnend
  48 # define eabi_fnend
  49 # undef eabi_save
  50 # define eabi_save(...)
  51 # undef eabi_cantunwind
  52 # define eabi_cantunwind
  53 # undef eabi_pad
  54 # define eabi_pad(n)
  55
  56 /* NaCl has its own special way of getting the thread pointer.  */
  57 # undef GET_TLS
  58 # define GET_TLS(tmp)           ldr r0, [r9]
  59
  60 /* Rather than macroizing the code any more, we can just define a few
  61    mnemonics as macros here.  */
  62 # define bl                     sfi_bl
  63 # define bx                     sfi_bx
  64 # define blx                    sfi_blx
  65 # define bxeq                   sfi_bxeq /* Only condition now in use.  */
  66
  67 #endif  /* __ASSEMBLER__ */
  68
  69 #endif  /* sysdep.h */