| 1 | typedef struct Ref Ref; |
| 2 | typedef struct Urestart Urestart; |
| 3 | typedef struct Uproc Uproc; |
| 4 | typedef struct Uproctab Uproctab; |
| 5 | typedef struct Uwaitq Uwaitq; |
| 6 | typedef struct Uwait Uwait; |
| 7 | |
| 8 | typedef struct Udev Udev; |
| 9 | typedef struct Ufile Ufile; |
| 10 | typedef struct Ustat Ustat; |
| 11 | typedef struct Udirent Udirent; |
| 12 | |
| 13 | typedef struct Ureg Ureg; |
| 14 | typedef struct Usiginfo Usiginfo; |
| 15 | |
| 16 | enum { |
| 17 | HZ = 100, |
| 18 | PAGESIZE = 0x1000, |
| 19 | |
| 20 | MAXPROC = 128, |
| 21 | MAXFD = 256, |
| 22 | |
| 23 | USTACK = 8*1024*1024, |
| 24 | KSTACK = 8*1024, |
| 25 | }; |
| 26 | |
| 27 | struct Ref |
| 28 | { |
| 29 | long ref; |
| 30 | }; |
| 31 | |
| 32 | struct Urestart |
| 33 | { |
| 34 | Urestart *link; |
| 35 | char *syscall; |
| 36 | |
| 37 | union { |
| 38 | struct { |
| 39 | vlong timeout; |
| 40 | } nanosleep; |
| 41 | struct { |
| 42 | vlong timeout; |
| 43 | } poll; |
| 44 | struct { |
| 45 | vlong timeout; |
| 46 | } select; |
| 47 | struct { |
| 48 | vlong timeout; |
| 49 | } futex; |
| 50 | }; |
| 51 | }; |
| 52 | |
| 53 | struct Uproc |
| 54 | { |
| 55 | QLock; |
| 56 | |
| 57 | int tid; |
| 58 | int pid; |
| 59 | int ppid; |
| 60 | int pgid; |
| 61 | int psid; |
| 62 | int uid; |
| 63 | int gid; |
| 64 | int umask; |
| 65 | int tlsmask; |
| 66 | |
| 67 | int kpid; |
| 68 | int notefd; |
| 69 | int argsfd; |
| 70 | |
| 71 | int wstate; |
| 72 | int wevent; |
| 73 | int exitcode; |
| 74 | int exitsignal; |
| 75 | |
| 76 | int *cleartidptr; |
| 77 | |
| 78 | vlong timeout; |
| 79 | |
| 80 | vlong alarm; |
| 81 | Uproc *alarmq; |
| 82 | |
| 83 | char *state; |
| 84 | char *xstate; |
| 85 | int innote; |
| 86 | int notified; |
| 87 | Ureg *ureg; |
| 88 | char *syscall; |
| 89 | void (*sysret)(int errno); |
| 90 | Urestart *restart; |
| 91 | Urestart restart0; |
| 92 | Uwait *freewait; |
| 93 | |
| 94 | void (*traceproc)(void *arg); |
| 95 | void *tracearg; |
| 96 | |
| 97 | int linkloop; |
| 98 | char *root; |
| 99 | char *cwd; |
| 100 | char *kcwd; |
| 101 | |
| 102 | void *fdtab; |
| 103 | void *mem; |
| 104 | void *trace; |
| 105 | void *signal; |
| 106 | |
| 107 | char *comm; |
| 108 | int ncomm; |
| 109 | ulong codestart; |
| 110 | ulong codeend; |
| 111 | ulong stackstart; |
| 112 | vlong starttime; |
| 113 | }; |
| 114 | |
| 115 | struct Uproctab |
| 116 | { |
| 117 | QLock; |
| 118 | int nextpid; |
| 119 | int alloc; |
| 120 | Uproc proc[MAXPROC]; |
| 121 | }; |
| 122 | |
| 123 | struct Uwaitq |
| 124 | { |
| 125 | QLock; |
| 126 | Uwait *w; |
| 127 | }; |
| 128 | |
| 129 | struct Uwait |
| 130 | { |
| 131 | Uwait *next; |
| 132 | Uwaitq *q; |
| 133 | Uwait *nextq; |
| 134 | Uproc *proc; |
| 135 | Ufile *file; |
| 136 | }; |
| 137 | |
| 138 | enum { |
| 139 | ROOTDEV, |
| 140 | SOCKDEV, |
| 141 | PIPEDEV, |
| 142 | CONSDEV, |
| 143 | MISCDEV, |
| 144 | DSPDEV, |
| 145 | PTYDEV, |
| 146 | PROCDEV, |
| 147 | MAXDEV, |
| 148 | }; |
| 149 | |
| 150 | /* device */ |
| 151 | struct Udev |
| 152 | { |
| 153 | int (*open)(char *path, int mode, int perm, Ufile **pf); |
| 154 | int (*access)(char *path, int perm); |
| 155 | int (*stat)(char *path, int link, Ustat *ps); |
| 156 | |
| 157 | int (*link)(char *old, char *new, int sym); |
| 158 | int (*unlink)(char *path, int rmdir); |
| 159 | int (*readlink)(char *path, char *buf, int len); |
| 160 | int (*rename)(char *old, char *new); |
| 161 | int (*mkdir)(char *path, int mode); |
| 162 | int (*utime)(char *path, long atime, long mtime); |
| 163 | int (*chmod)(char *path, int mode); |
| 164 | int (*chown)(char *path, int uid, int gid, int link); |
| 165 | int (*truncate)(char *path, vlong size); |
| 166 | |
| 167 | int (*read)(Ufile *file, void *buf, int len, vlong off); |
| 168 | int (*write)(Ufile *file, void *buf, int len, vlong off); |
| 169 | |
| 170 | vlong (*size)(Ufile *file); |
| 171 | int (*poll)(Ufile *file, void *tab); |
| 172 | int (*ioctl)(Ufile *file, int cmd, void *arg); |
| 173 | int (*close)(Ufile *file); |
| 174 | |
| 175 | int (*fstat)(Ufile *file, Ustat *ps); |
| 176 | int (*readdir)(Ufile *file, Udirent **pd); |
| 177 | |
| 178 | int (*fchmod)(Ufile *file, int mode); |
| 179 | int (*fchown)(Ufile *file, int uid, int gid); |
| 180 | int (*ftruncate)(Ufile *file, vlong size); |
| 181 | }; |
| 182 | |
| 183 | struct Ufile |
| 184 | { |
| 185 | Ref; |
| 186 | |
| 187 | int mode; |
| 188 | int dev; |
| 189 | char *path; |
| 190 | int fd; |
| 191 | vlong off; |
| 192 | |
| 193 | Udirent *rdaux; /* aux pointer to hold Udirent* chains */ |
| 194 | }; |
| 195 | |
| 196 | struct Ustat |
| 197 | { |
| 198 | int mode; |
| 199 | int uid; |
| 200 | int gid; |
| 201 | int dev; |
| 202 | int rdev; |
| 203 | vlong size; |
| 204 | ulong atime; |
| 205 | ulong mtime; |
| 206 | ulong ctime; |
| 207 | uvlong ino; |
| 208 | }; |
| 209 | |
| 210 | struct Udirent |
| 211 | { |
| 212 | Udirent *next; |
| 213 | |
| 214 | uvlong ino; |
| 215 | int mode; |
| 216 | char name[]; |
| 217 | }; |
| 218 | |
| 219 | struct Usiginfo |
| 220 | { |
| 221 | int signo; |
| 222 | int errno; |
| 223 | int code; |
| 224 | |
| 225 | union { |
| 226 | /* kill() */ |
| 227 | struct { |
| 228 | int pid; /* sender's pid */ |
| 229 | int uid; /* sender's uid */ |
| 230 | } kill; |
| 231 | |
| 232 | /* POSIX.1b timers */ |
| 233 | struct { |
| 234 | int tid; /* timer id */ |
| 235 | int overrun; /* overrun count */ |
| 236 | int val; /* same as below */ |
| 237 | int sys_private; /* not to be passed to user */ |
| 238 | } timer; |
| 239 | |
| 240 | /* POSIX.1b signals */ |
| 241 | struct { |
| 242 | int pid; /* sender's pid */ |
| 243 | int uid; /* sender's uid */ |
| 244 | int val; |
| 245 | } rt; |
| 246 | |
| 247 | /* SIGCHLD */ |
| 248 | struct { |
| 249 | int pid; /* which child */ |
| 250 | int uid; /* sender's uid */ |
| 251 | int status; /* exit code */ |
| 252 | long utime; |
| 253 | long stime; |
| 254 | } chld; |
| 255 | |
| 256 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ |
| 257 | struct { |
| 258 | void *addr; /* faulting insn/memory ref. */ |
| 259 | int trapno; /* TRAP # which caused the signal */ |
| 260 | } fault; |
| 261 | |
| 262 | /* SIGPOLL */ |
| 263 | struct { |
| 264 | long band; /* POLL_IN, POLL_OUT, POLL_MSG */ |
| 265 | int fd; |
| 266 | } poll; |
| 267 | }; |
| 268 | |
| 269 | int topid; |
| 270 | int group; |
| 271 | }; |
| 272 | |
| 273 | int debug; |
| 274 | long *kstack; |
| 275 | long *exitjmp; |
| 276 | Uproc **pcurrent; |
| 277 | #define current (*pcurrent) |
| 278 | vlong boottime; |
| 279 | |
| 280 | Udev *devtab[MAXDEV]; |
| 281 | Uproctab proctab; |