libc/sysdeps/linux/or1k/sysdep.h

   1 /* Copyright (C) 2011-2014 Free Software Foundation, Inc.
   2
   3 The GNU C Library is free software; you can redistribute it and/or
   4 modify it under the terms of the GNU Lesser General Public License as
   5 published by the Free Software Foundation; either version 2.1 of the
   6 License, or (at your option) any later version.
   7
   8 The GNU C Library is distributed in the hope that it will be useful,
   9 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 Lesser General Public License for more details.
  12
  13 You should have received a copy of the GNU Lesser General Public
  14 License along with the GNU C Library; if not, see
  15 <http://www.gnu.org/licenses/>.  */
  16
  17 #ifndef _LINUX_OR1K_SYSDEP_H
  18 #define _LINUX_OR1K_SYSDEP_H 1
  19
  20 #include <common/sysdep.h>
  21 #include <sys/syscall.h>
  22
  23 /* In order to get __set_errno() definition in INLINE_SYSCALL.  */
  24 #ifndef __ASSEMBLER__
  25 #include <errno.h>
  26 #endif
  27
  28 #undef SYS_ify
  29 #define SYS_ify(syscall_name)   (__NR_##syscall_name)
  30
  31 #ifdef __ASSEMBLER__
  32
  33 /* Local label name for asm code. */
  34 #define L(name)         .L##name
  35
  36 #undef ret_ERRVAL
  37 #define ret_ERRVAL   l.jr r9; l.nop
  38 #define ret_NOERRNO  l.jr r9; l.nop
  39
  40 #undef DO_CALL
  41 #define DO_CALL(syscall_name) \
  42     l.addi r11, r0, SYS_ify (syscall_name); \
  43     l.sys 1; \
  44     l.nop
  45
  46 /* Make use of .size directive.  */
  47 #define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
  48
  49 /* Define an entry point visible from C.  */
  50 #define ENTRY(name)                                                           \
  51   .globl C_SYMBOL_NAME(name);                                                 \
  52   .type C_SYMBOL_NAME(name),@function;                                        \
  53   .align 4;                                                                   \
  54   C_LABEL(name)                                                               \
  55   cfi_startproc;                                                              \
  56
  57 #undef  END
  58 #define END(name)                                                             \
  59   cfi_endproc;                                                                \
  60   ASM_SIZE_DIRECTIVE(name)
  61
  62 /* Since C identifiers are not normally prefixed with an underscore
  63    on this system, the asm identifier `syscall_error' intrudes on the
  64    C name space.  Make sure we use an innocuous name.  */
  65 #define syscall_error   __syscall_error
  66
  67 /* Specify the size in bytes of a machine register.  */
  68 #define REGSIZE         4
  69
  70 #endif  /* __ASSEMBLER__ */
  71
  72 #endif /* linux/or1k/sysdep.h */