usr.bin/truss/syscall.h

   1 /*
   2  * See i386-fbsd.c for copyright and license terms.
   3  *
   4  * System call arguments come in several flavours:
   5  * Hex -- values that should be printed in hex (addresses)
   6  * Octal -- Same as above, but octal
   7  * Int -- normal integer values (file descriptors, for example)
   8  * String -- pointers to sensible data.  Note that we treat read() and
   9  *      write() arguments as such, even though they may *not* be
  10  *      printable data.
  11  * Ptr -- pointer to some specific structure.  Just print as hex for now.
  12  * Quad -- a double-word value.  e.g., lseek(int, offset_t, int)
  13  * Stat -- a pointer to a stat buffer.  Currently unused.
  14  * Ioctl -- an ioctl command.  Woefully limited.
  15  *
  16  * In addition, the pointer types (String, Ptr) may have OUT masked in --
  17  * this means that the data is set on *return* from the system call -- or
  18  * IN (meaning that the data is passed *into* the system call).
  19  */
  20 /*
  21  * $FreeBSD: src/usr.bin/truss/syscall.h,v 1.5.2.3 2002/02/15 11:43:51 des Exp $
  22  * $DragonFly: src/usr.bin/truss/syscall.h,v 1.2 2003/06/17 04:29:33 dillon Exp $
  23  */
  24
  25 enum Argtype { None = 1, Hex, Octal, Int, String, Ptr, Stat, Ioctl, Quad,
  26         Signal, Sockaddr };
  27
  28 #define ARG_MASK        0xff
  29 #define OUT     0x100
  30 #define IN      /*0x20*/0
  31
  32 struct syscall_args {
  33         enum Argtype type;
  34         int offset;
  35 };
  36
  37 struct syscall {
  38         const char *name;
  39         int ret_type;   /* 0, 1, or 2 return values */
  40         int nargs;      /* actual number of meaningful arguments */
  41                         /* Hopefully, no syscalls with > 10 args */
  42         struct syscall_args args[10];
  43 };
  44
  45 struct syscall *get_syscall(const char*);
  46 char *get_string(int, void*, int);
  47 char *print_arg(int, struct syscall_args *, unsigned long*);
  48 void print_syscall(FILE *, const char *, int, char **);
  49 void print_syscall_ret(FILE *, const char *, int, char **, int, int);