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

   1 /* Assembly macros for LoongArch.
   2    Copyright (C) 2022-2024 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _LINUX_LOONGARCH_SYSDEP_H
  20 #define _LINUX_LOONGARCH_SYSDEP_H 1
  21
  22 #include <sysdeps/unix/sysv/linux/sysdep.h>
  23 #include <sysdeps/unix/sysdep.h>
  24 #include <tls.h>
  25
  26 #ifdef __ASSEMBLER__
  27
  28 #include <sys/asm.h>
  29 #define ret jirl zero, ra, 0
  30 #define L(label) .L##label
  31
  32 /* Performs a system call, handling errors by setting errno.  Linux indicates
  33    errors by setting a0 to a value between -1 and -4095.  */
  34 #undef PSEUDO
  35 #define PSEUDO(name, syscall_name, args) \
  36   ENTRY (name); \
  37   li.d a7, SYS_ify (syscall_name); \
  38   syscall 0; \
  39   li.d a7, -4096; \
  40   bltu a7, a0, .Lsyscall_error##name;
  41
  42 #undef PSEUDO_END
  43 #define PSEUDO_END(sym) \
  44   SYSCALL_ERROR_HANDLER (sym); \
  45   ret; \
  46   END (sym);
  47
  48 #if !IS_IN(libc)
  49 #if RTLD_PRIVATE_ERRNO
  50
  51 #define SYSCALL_ERROR_HANDLER(name) \
  52   .Lsyscall_error##name : la t0, rtld_errno; \
  53   sub.w a0, zero, a0; \
  54   st.w a0, t0, 0; \
  55   li.d a0, -1;
  56
  57 #else
  58
  59 #define SYSCALL_ERROR_HANDLER(name) \
  60   .Lsyscall_error##name : la.tls.ie t0, errno; \
  61   add.d t0, tp, t0; \
  62   sub.w a0, zero, a0; \
  63   st.w a0, t0, 0; \
  64   li.d a0, -1;
  65
  66 #endif
  67 #else
  68
  69 #define SYSCALL_ERROR_HANDLER(name) .Lsyscall_error##name : b __syscall_error;
  70
  71 #endif
  72
  73 /* Performs a system call, not setting errno.  */
  74 #undef PSEUDO_NEORRNO
  75 #define PSEUDO_NOERRNO(name, syscall_name, args) \
  76   ENTRY (name); \
  77   li.d a7, SYS_ify (syscall_name); \
  78   syscall 0;
  79
  80 #undef PSEUDO_END_NOERRNO
  81 #define PSEUDO_END_NOERRNO(name) END (name);
  82
  83 #undef ret_NOERRNO
  84 #define ret_NOERRNO ret
  85
  86 /* Performs a system call, returning the error code.  */
  87 #undef PSEUDO_ERRVAL
  88 #define PSEUDO_ERRVAL(name, syscall_name, args) \
  89   PSEUDO_NOERRNO (name, syscall_name, args); \
  90   slli.d a0, a0, 32; \
  91   srai.d a0, a0, 32; /* sign_ext */ \
  92   sub.d a0, zero, a0;
  93
  94 #undef PSEUDO_END_ERRVAL
  95 #define PSEUDO_END_ERRVAL(name) END (name);
  96
  97 #undef ret_ERRVAL
  98 #define ret_ERRVAL ret
  99
 100 #endif /* __ASSEMBLER__ */
 101
 102 /* In order to get __set_errno() definition in INLINE_SYSCALL.  */
 103 #ifndef __ASSEMBLER__
 104 #include <errno.h>
 105 #endif
 106
 107 #include <sysdeps/unix/sysdep.h>
 108
 109 #undef SYS_ify
 110 #define SYS_ify(syscall_name) __NR_##syscall_name
 111
 112 #ifndef __ASSEMBLER__
 113
 114 #define VDSO_NAME "LINUX_5.10"
 115 #define VDSO_HASH 182947696
 116
 117 /* List of system calls which are supported as vsyscalls.  */
 118 #define HAVE_CLOCK_GETRES64_VSYSCALL "__vdso_clock_getres"
 119 #define HAVE_CLOCK_GETTIME64_VSYSCALL "__vdso_clock_gettime"
 120 #define HAVE_GETTIMEOFDAY_VSYSCALL "__vdso_gettimeofday"
 121 #define HAVE_GETCPU_VSYSCALL "__vdso_getcpu"
 122
 123 #define HAVE_CLONE3_WRAPPER 1
 124
 125 #define INTERNAL_SYSCALL(name, nr, args...) \
 126   internal_syscall##nr (SYS_ify (name), args)
 127
 128 #define INTERNAL_SYSCALL_NCS(number, nr, args...) \
 129   internal_syscall##nr (number, args)
 130
 131 #define internal_syscall0(number, dummy...) \
 132   ({ \
 133     long int _sys_result; \
 134 \
 135     { \
 136       register long int __a7 asm ("$a7") = number; \
 137       register long int __a0 asm ("$a0"); \
 138       __asm__ volatile ("syscall 0\n\t" \
 139                        : "=r"(__a0) \
 140                        : "r"(__a7) \
 141                        : __SYSCALL_CLOBBERS); \
 142       _sys_result = __a0; \
 143     } \
 144     _sys_result; \
 145   })
 146
 147 #define internal_syscall1(number, arg0) \
 148   ({ \
 149     long int _sys_result; \
 150 \
 151     { \
 152       long int _arg0 = (long int) (arg0); \
 153       register long int __a7 asm ("$a7") = number; \
 154       register long int __a0 asm ("$a0") = _arg0; \
 155       __asm__ volatile ("syscall 0\n\t" \
 156                        : "+r"(__a0) \
 157                        : "r"(__a7) \
 158                        : __SYSCALL_CLOBBERS); \
 159       _sys_result = __a0; \
 160     } \
 161     _sys_result; \
 162   })
 163
 164 #define internal_syscall2(number, arg0, arg1) \
 165   ({ \
 166     long int _sys_result; \
 167 \
 168     { \
 169       long int _arg0 = (long int) (arg0); \
 170       long int _arg1 = (long int) (arg1); \
 171       register long int __a7 asm ("$a7") = number; \
 172       register long int __a0 asm ("$a0") = _arg0; \
 173       register long int __a1 asm ("$a1") = _arg1; \
 174       __asm__ volatile ("syscall 0\n\t" \
 175                        : "+r"(__a0) \
 176                        : "r"(__a7), "r"(__a1) \
 177                        : __SYSCALL_CLOBBERS); \
 178       _sys_result = __a0; \
 179     } \
 180     _sys_result; \
 181   })
 182
 183 #define internal_syscall3(number, arg0, arg1, arg2) \
 184   ({ \
 185     long int _sys_result; \
 186 \
 187     { \
 188       long int _arg0 = (long int) (arg0); \
 189       long int _arg1 = (long int) (arg1); \
 190       long int _arg2 = (long int) (arg2); \
 191       register long int __a7 asm ("$a7") = number; \
 192       register long int __a0 asm ("$a0") = _arg0; \
 193       register long int __a1 asm ("$a1") = _arg1; \
 194       register long int __a2 asm ("$a2") = _arg2; \
 195       __asm__ volatile ("syscall 0\n\t" \
 196                        : "+r"(__a0) \
 197                        : "r"(__a7), "r"(__a1), "r"(__a2) \
 198                        : __SYSCALL_CLOBBERS); \
 199       _sys_result = __a0; \
 200     } \
 201     _sys_result; \
 202   })
 203
 204 #define internal_syscall4(number, arg0, arg1, arg2, arg3) \
 205   ({ \
 206     long int _sys_result; \
 207 \
 208     { \
 209       long int _arg0 = (long int) (arg0); \
 210       long int _arg1 = (long int) (arg1); \
 211       long int _arg2 = (long int) (arg2); \
 212       long int _arg3 = (long int) (arg3); \
 213       register long int __a7 asm ("$a7") = number; \
 214       register long int __a0 asm ("$a0") = _arg0; \
 215       register long int __a1 asm ("$a1") = _arg1; \
 216       register long int __a2 asm ("$a2") = _arg2; \
 217       register long int __a3 asm ("$a3") = _arg3; \
 218       __asm__ volatile ("syscall 0\n\t" \
 219                        : "+r"(__a0) \
 220                        : "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3) \
 221                        : __SYSCALL_CLOBBERS); \
 222       _sys_result = __a0; \
 223     } \
 224     _sys_result; \
 225   })
 226
 227 #define internal_syscall5(number, arg0, arg1, arg2, arg3, arg4) \
 228   ({ \
 229     long int _sys_result; \
 230 \
 231     { \
 232       long int _arg0 = (long int) (arg0); \
 233       long int _arg1 = (long int) (arg1); \
 234       long int _arg2 = (long int) (arg2); \
 235       long int _arg3 = (long int) (arg3); \
 236       long int _arg4 = (long int) (arg4); \
 237       register long int __a7 asm ("$a7") = number; \
 238       register long int __a0 asm ("$a0") = _arg0; \
 239       register long int __a1 asm ("$a1") = _arg1; \
 240       register long int __a2 asm ("$a2") = _arg2; \
 241       register long int __a3 asm ("$a3") = _arg3; \
 242       register long int __a4 asm ("$a4") = _arg4; \
 243       __asm__ volatile ("syscall 0\n\t" \
 244                        : "+r"(__a0) \
 245                        : "r"(__a7), "r"(__a1), "r"(__a2), \
 246                          "r"(__a3), "r"(__a4) \
 247                        : __SYSCALL_CLOBBERS); \
 248       _sys_result = __a0; \
 249     } \
 250     _sys_result; \
 251   })
 252
 253 #define internal_syscall6(number, arg0, arg1, arg2, arg3, arg4, arg5) \
 254   ({ \
 255     long int _sys_result; \
 256 \
 257     { \
 258       long int _arg0 = (long int) (arg0); \
 259       long int _arg1 = (long int) (arg1); \
 260       long int _arg2 = (long int) (arg2); \
 261       long int _arg3 = (long int) (arg3); \
 262       long int _arg4 = (long int) (arg4); \
 263       long int _arg5 = (long int) (arg5); \
 264       register long int __a7 asm ("$a7") = number; \
 265       register long int __a0 asm ("$a0") = _arg0; \
 266       register long int __a1 asm ("$a1") = _arg1; \
 267       register long int __a2 asm ("$a2") = _arg2; \
 268       register long int __a3 asm ("$a3") = _arg3; \
 269       register long int __a4 asm ("$a4") = _arg4; \
 270       register long int __a5 asm ("$a5") = _arg5; \
 271       __asm__ volatile ("syscall 0\n\t" \
 272                        : "+r"(__a0) \
 273                        : "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
 274                          "r"(__a4), "r"(__a5) \
 275                        : __SYSCALL_CLOBBERS); \
 276       _sys_result = __a0; \
 277     } \
 278     _sys_result; \
 279   })
 280
 281 #define internal_syscall7(number, arg0, arg1, arg2, arg3, arg4, arg5, arg6) \
 282   ({ \
 283     long int _sys_result; \
 284 \
 285     { \
 286       long int _arg0 = (long int) (arg0); \
 287       long int _arg1 = (long int) (arg1); \
 288       long int _arg2 = (long int) (arg2); \
 289       long int _arg3 = (long int) (arg3); \
 290       long int _arg4 = (long int) (arg4); \
 291       long int _arg5 = (long int) (arg5); \
 292       long int _arg6 = (long int) (arg6); \
 293       register long int __a7 asm ("$a7") = number; \
 294       register long int __a0 asm ("$a0") = _arg0; \
 295       register long int __a1 asm ("$a1") = _arg1; \
 296       register long int __a2 asm ("$a2") = _arg2; \
 297       register long int __a3 asm ("$a3") = _arg3; \
 298       register long int __a4 asm ("$a4") = _arg4; \
 299       register long int __a5 asm ("$a5") = _arg5; \
 300       register long int __a6 asm ("$a6") = _arg6; \
 301       __asm__ volatile ("syscall 0\n\t" \
 302                        : "+r"(__a0) \
 303                        : "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
 304                          "r"(__a4), "r"(__a5), "r"(__a6) \
 305                        : __SYSCALL_CLOBBERS); \
 306       _sys_result = __a0; \
 307     } \
 308     _sys_result; \
 309   })
 310
 311 #define __SYSCALL_CLOBBERS \
 312   "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "memory"
 313
 314 extern long int __syscall_error (long int neg_errno);
 315
 316 #endif /* ! __ASSEMBLER__ */
 317
 318 #endif /* linux/loongarch/sysdep.h */