libc-top-half/musl/src/internal/syscall.h

   1 #ifndef _INTERNAL_SYSCALL_H
   2 #define _INTERNAL_SYSCALL_H
   3
   4 #include <features.h>
   5 #include <sys/syscall.h>
   6 #include "syscall_arch.h"
   7
   8 #ifndef SYSCALL_RLIM_INFINITY
   9 #define SYSCALL_RLIM_INFINITY (~0ULL)
  10 #endif
  11
  12 #ifndef SYSCALL_MMAP2_UNIT
  13 #define SYSCALL_MMAP2_UNIT 4096ULL
  14 #endif
  15
  16 #ifndef __SYSCALL_LL_PRW
  17 #define __SYSCALL_LL_PRW(x) __SYSCALL_LL_O(x)
  18 #endif
  19
  20 #ifndef __scc
  21 #define __scc(X) ((long) (X))
  22 typedef long syscall_arg_t;
  23 #endif
  24
  25 hidden long __syscall_ret(unsigned long),
  26         __syscall_cp(syscall_arg_t, syscall_arg_t, syscall_arg_t, syscall_arg_t,
  27                      syscall_arg_t, syscall_arg_t, syscall_arg_t);
  28
  29 #define __syscall1(n,a) __syscall1(n,__scc(a))
  30 #define __syscall2(n,a,b) __syscall2(n,__scc(a),__scc(b))
  31 #define __syscall3(n,a,b,c) __syscall3(n,__scc(a),__scc(b),__scc(c))
  32 #define __syscall4(n,a,b,c,d) __syscall4(n,__scc(a),__scc(b),__scc(c),__scc(d))
  33 #define __syscall5(n,a,b,c,d,e) __syscall5(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e))
  34 #define __syscall6(n,a,b,c,d,e,f) __syscall6(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f))
  35 #define __syscall7(n,a,b,c,d,e,f,g) __syscall7(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f),__scc(g))
  36
  37 #define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n
  38 #define __SYSCALL_NARGS(...) __SYSCALL_NARGS_X(__VA_ARGS__,7,6,5,4,3,2,1,0,)
  39 #define __SYSCALL_CONCAT_X(a,b) a##b
  40 #define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X(a,b)
  41 #define __SYSCALL_DISP(b,...) __SYSCALL_CONCAT(b,__SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
  42
  43 #define __syscall(...) __SYSCALL_DISP(__syscall,__VA_ARGS__)
  44 #define syscall(...) __syscall_ret(__syscall(__VA_ARGS__))
  45
  46 #define socketcall __socketcall
  47 #define socketcall_cp __socketcall_cp
  48
  49 #define __syscall_cp0(n) (__syscall_cp)(n,0,0,0,0,0,0)
  50 #define __syscall_cp1(n,a) (__syscall_cp)(n,__scc(a),0,0,0,0,0)
  51 #define __syscall_cp2(n,a,b) (__syscall_cp)(n,__scc(a),__scc(b),0,0,0,0)
  52 #define __syscall_cp3(n,a,b,c) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),0,0,0)
  53 #define __syscall_cp4(n,a,b,c,d) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),__scc(d),0,0)
  54 #define __syscall_cp5(n,a,b,c,d,e) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),0)
  55 #define __syscall_cp6(n,a,b,c,d,e,f) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f))
  56
  57 #define __syscall_cp(...) __SYSCALL_DISP(__syscall_cp,__VA_ARGS__)
  58 #define syscall_cp(...) __syscall_ret(__syscall_cp(__VA_ARGS__))
  59
  60 #ifndef SYSCALL_USE_SOCKETCALL
  61 #define __socketcall(nm,a,b,c,d,e,f) syscall(SYS_##nm, a, b, c, d, e, f)
  62 #define __socketcall_cp(nm,a,b,c,d,e,f) syscall_cp(SYS_##nm, a, b, c, d, e, f)
  63 #else
  64 #define __socketcall(nm,a,b,c,d,e,f) syscall(SYS_socketcall, __SC_##nm, \
  65     ((long [6]){ (long)a, (long)b, (long)c, (long)d, (long)e, (long)f }))
  66 #define __socketcall_cp(nm,a,b,c,d,e,f) syscall_cp(SYS_socketcall, __SC_##nm, \
  67     ((long [6]){ (long)a, (long)b, (long)c, (long)d, (long)e, (long)f }))
  68 #endif
  69
  70 /* fixup legacy 16-bit junk */
  71
  72 #ifdef SYS_getuid32
  73 #undef SYS_lchown
  74 #undef SYS_getuid
  75 #undef SYS_getgid
  76 #undef SYS_geteuid
  77 #undef SYS_getegid
  78 #undef SYS_setreuid
  79 #undef SYS_setregid
  80 #undef SYS_getgroups
  81 #undef SYS_setgroups
  82 #undef SYS_fchown
  83 #undef SYS_setresuid
  84 #undef SYS_getresuid
  85 #undef SYS_setresgid
  86 #undef SYS_getresgid
  87 #undef SYS_chown
  88 #undef SYS_setuid
  89 #undef SYS_setgid
  90 #undef SYS_setfsuid
  91 #undef SYS_setfsgid
  92 #define SYS_lchown SYS_lchown32
  93 #define SYS_getuid SYS_getuid32
  94 #define SYS_getgid SYS_getgid32
  95 #define SYS_geteuid SYS_geteuid32
  96 #define SYS_getegid SYS_getegid32
  97 #define SYS_setreuid SYS_setreuid32
  98 #define SYS_setregid SYS_setregid32
  99 #define SYS_getgroups SYS_getgroups32
 100 #define SYS_setgroups SYS_setgroups32
 101 #define SYS_fchown SYS_fchown32
 102 #define SYS_setresuid SYS_setresuid32
 103 #define SYS_getresuid SYS_getresuid32
 104 #define SYS_setresgid SYS_setresgid32
 105 #define SYS_getresgid SYS_getresgid32
 106 #define SYS_chown SYS_chown32
 107 #define SYS_setuid SYS_setuid32
 108 #define SYS_setgid SYS_setgid32
 109 #define SYS_setfsuid SYS_setfsuid32
 110 #define SYS_setfsgid SYS_setfsgid32
 111 #endif
 112
 113
 114 /* fixup legacy 32-bit-vs-lfs64 junk */
 115
 116 #ifdef SYS_fcntl64
 117 #undef SYS_fcntl
 118 #define SYS_fcntl SYS_fcntl64
 119 #endif
 120
 121 #ifdef SYS_getdents64
 122 #undef SYS_getdents
 123 #define SYS_getdents SYS_getdents64
 124 #endif
 125
 126 #ifdef SYS_ftruncate64
 127 #undef SYS_ftruncate
 128 #undef SYS_truncate
 129 #define SYS_ftruncate SYS_ftruncate64
 130 #define SYS_truncate SYS_truncate64
 131 #endif
 132
 133 #ifdef SYS_stat64
 134 #undef SYS_stat
 135 #define SYS_stat SYS_stat64
 136 #endif
 137
 138 #ifdef SYS_fstat64
 139 #undef SYS_fstat
 140 #define SYS_fstat SYS_fstat64
 141 #endif
 142
 143 #ifdef SYS_lstat64
 144 #undef SYS_lstat
 145 #define SYS_lstat SYS_lstat64
 146 #endif
 147
 148 #ifdef SYS_statfs64
 149 #undef SYS_statfs
 150 #define SYS_statfs SYS_statfs64
 151 #endif
 152
 153 #ifdef SYS_fstatfs64
 154 #undef SYS_fstatfs
 155 #define SYS_fstatfs SYS_fstatfs64
 156 #endif
 157
 158 #if defined(SYS_newfstatat)
 159 #undef SYS_fstatat
 160 #define SYS_fstatat SYS_newfstatat
 161 #elif defined(SYS_fstatat64)
 162 #undef SYS_fstatat
 163 #define SYS_fstatat SYS_fstatat64
 164 #endif
 165
 166 #ifdef SYS_ugetrlimit
 167 #undef SYS_getrlimit
 168 #define SYS_getrlimit SYS_ugetrlimit
 169 #endif
 170
 171 #ifdef SYS__newselect
 172 #undef SYS_select
 173 #define SYS_select SYS__newselect
 174 #endif
 175
 176 #ifdef SYS_pread64
 177 #undef SYS_pread
 178 #undef SYS_pwrite
 179 #define SYS_pread SYS_pread64
 180 #define SYS_pwrite SYS_pwrite64
 181 #endif
 182
 183 #ifdef SYS_fadvise64_64
 184 #undef SYS_fadvise
 185 #define SYS_fadvise SYS_fadvise64_64
 186 #elif defined(SYS_fadvise64)
 187 #undef SYS_fadvise
 188 #define SYS_fadvise SYS_fadvise64
 189 #endif
 190
 191 #ifdef SYS_sendfile64
 192 #undef SYS_sendfile
 193 #define SYS_sendfile SYS_sendfile64
 194 #endif
 195
 196 /* socketcall calls */
 197
 198 #define __SC_socket      1
 199 #define __SC_bind        2
 200 #define __SC_connect     3
 201 #define __SC_listen      4
 202 #define __SC_accept      5
 203 #define __SC_getsockname 6
 204 #define __SC_getpeername 7
 205 #define __SC_socketpair  8
 206 #define __SC_send        9
 207 #define __SC_recv        10
 208 #define __SC_sendto      11
 209 #define __SC_recvfrom    12
 210 #define __SC_shutdown    13
 211 #define __SC_setsockopt  14
 212 #define __SC_getsockopt  15
 213 #define __SC_sendmsg     16
 214 #define __SC_recvmsg     17
 215 #define __SC_accept4     18
 216 #define __SC_recvmmsg    19
 217 #define __SC_sendmmsg    20
 218
 219 #ifdef SYS_open
 220 #define __sys_open2(x,pn,fl) __syscall2(SYS_open, pn, (fl)|O_LARGEFILE)
 221 #define __sys_open3(x,pn,fl,mo) __syscall3(SYS_open, pn, (fl)|O_LARGEFILE, mo)
 222 #define __sys_open_cp2(x,pn,fl) __syscall_cp2(SYS_open, pn, (fl)|O_LARGEFILE)
 223 #define __sys_open_cp3(x,pn,fl,mo) __syscall_cp3(SYS_open, pn, (fl)|O_LARGEFILE, mo)
 224 #else
 225 #define __sys_open2(x,pn,fl) __syscall3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
 226 #define __sys_open3(x,pn,fl,mo) __syscall4(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
 227 #define __sys_open_cp2(x,pn,fl) __syscall_cp3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
 228 #define __sys_open_cp3(x,pn,fl,mo) __syscall_cp4(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
 229 #endif
 230
 231 #define __sys_open(...) __SYSCALL_DISP(__sys_open,,__VA_ARGS__)
 232 #define sys_open(...) __syscall_ret(__sys_open(__VA_ARGS__))
 233
 234 #define __sys_open_cp(...) __SYSCALL_DISP(__sys_open_cp,,__VA_ARGS__)
 235 #define sys_open_cp(...) __syscall_ret(__sys_open_cp(__VA_ARGS__))
 236
 237 hidden void __procfdname(char __buf[static 15+3*sizeof(int)], unsigned);
 238
 239 hidden void *__vdsosym(const char *, const char *);
 240
 241 #endif