sysdeps/unix/sysv/linux/s390/sysdep.h

   1 /* Syscall definitions, Linux s390 version.
   2    Copyright (C) 2019-2021 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 __ASSEMBLY__
  20
  21 #undef SYS_ify
  22 #define SYS_ify(syscall_name)   __NR_##syscall_name
  23
  24 #undef INTERNAL_SYSCALL_DIRECT
  25 #define INTERNAL_SYSCALL_DIRECT(name, nr, args...)                            \
  26   ({                                                                          \
  27     DECLARGS_##nr(args)                                                       \
  28     register long int _ret __asm__("2");                                      \
  29     __asm__ __volatile__ (                                                    \
  30                           "svc    %b1\n\t"                                    \
  31                           : "=d" (_ret)                                       \
  32                           : "i" (__NR_##name) ASMFMT_##nr                     \
  33                           : "memory" );                                       \
  34     _ret; })
  35
  36 #undef INTERNAL_SYSCALL_SVC0
  37 #define INTERNAL_SYSCALL_SVC0(name, nr, args...)                              \
  38   ({                                                                          \
  39     DECLARGS_##nr(args)                                                       \
  40     register unsigned long int _nr __asm__("1") =                             \
  41       (unsigned long int)(__NR_##name);                                       \
  42     register long int _ret __asm__("2");                                      \
  43     __asm__ __volatile__ (                                                    \
  44                           "svc    0\n\t"                                      \
  45                           : "=d" (_ret)                                       \
  46                           : "d" (_nr) ASMFMT_##nr                             \
  47                           : "memory" );                                       \
  48     _ret; })
  49
  50 #undef INTERNAL_SYSCALL_NCS
  51 #define INTERNAL_SYSCALL_NCS(no, nr, args...)                                 \
  52   ({                                                                          \
  53     DECLARGS_##nr(args)                                                       \
  54     register unsigned long int _nr __asm__("1") = (unsigned long int)(no);    \
  55     register long int _ret __asm__("2");                                      \
  56     __asm__ __volatile__ (                                                    \
  57                           "svc    0\n\t"                                      \
  58                           : "=d" (_ret)                                       \
  59                           : "d" (_nr) ASMFMT_##nr                             \
  60                           : "memory" );                                       \
  61     _ret; })
  62
  63 #undef INTERNAL_SYSCALL
  64 #define INTERNAL_SYSCALL(name, nr, args...)                                   \
  65   (((__NR_##name) < 256)                                                      \
  66    ? INTERNAL_SYSCALL_DIRECT(name, nr, args)                                  \
  67    : INTERNAL_SYSCALL_SVC0(name, nr, args))
  68
  69 #define DECLARGS_0()
  70 #define DECLARGS_1(arg1) \
  71   register unsigned long int gpr2 __asm__ ("2") = (unsigned long int)(arg1);
  72 #define DECLARGS_2(arg1, arg2) \
  73   DECLARGS_1(arg1) \
  74   register unsigned long int gpr3 __asm__ ("3") = (unsigned long int)(arg2);
  75 #define DECLARGS_3(arg1, arg2, arg3) \
  76   DECLARGS_2(arg1, arg2) \
  77   register unsigned long int gpr4 __asm__ ("4") = (unsigned long int)(arg3);
  78 #define DECLARGS_4(arg1, arg2, arg3, arg4) \
  79   DECLARGS_3(arg1, arg2, arg3) \
  80   register unsigned long int gpr5 __asm__ ("5") = (unsigned long int)(arg4);
  81 #define DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \
  82   DECLARGS_4(arg1, arg2, arg3, arg4) \
  83   register unsigned long int gpr6 __asm__ ("6") = (unsigned long int)(arg5);
  84 #define DECLARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
  85   DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \
  86   register unsigned long int gpr7 __asm__ ("7") = (unsigned long int)(arg6);
  87
  88 #define ASMFMT_0
  89 #define ASMFMT_1 , "0" (gpr2)
  90 #define ASMFMT_2 , "0" (gpr2), "d" (gpr3)
  91 #define ASMFMT_3 , "0" (gpr2), "d" (gpr3), "d" (gpr4)
  92 #define ASMFMT_4 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5)
  93 #define ASMFMT_5 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6)
  94 #define ASMFMT_6 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6), "d" (gpr7)
  95
  96 #define SINGLE_THREAD_BY_GLOBAL         1
  97
  98
  99 #define VDSO_NAME  "LINUX_2.6.29"
 100 #define VDSO_HASH  123718585
 101
 102 /* List of system calls which are supported as vsyscalls.  */
 103 #ifdef __s390x__
 104 #define HAVE_CLOCK_GETRES64_VSYSCALL    "__kernel_clock_getres"
 105 #define HAVE_CLOCK_GETTIME64_VSYSCALL   "__kernel_clock_gettime"
 106 #else
 107 #define HAVE_CLOCK_GETRES_VSYSCALL      "__kernel_clock_getres"
 108 #define HAVE_CLOCK_GETTIME_VSYSCALL     "__kernel_clock_gettime"
 109 #endif
 110 #define HAVE_GETTIMEOFDAY_VSYSCALL      "__kernel_gettimeofday"
 111 #define HAVE_GETCPU_VSYSCALL            "__kernel_getcpu"
 112
 113 #endif