1 files changed, 43 insertions, 0 deletions
diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
new file mode 100644
index 0000000..74f8334
--- /dev/null
+++ b/usr.bin/truss/syscall.h
@@ -0,0 +1,43 @@
+/*
+ * System call arguments come in several flavours:
+ * Hex -- values that should be printed in hex (addresses)
+ * Octal -- Same as above, but octal
+ * Int -- normal integer values (file descriptors, for example)
+ * String -- pointers to sensible data.  Note that we treat read() and
+ *	write() arguments as such, even though they may *not* be
+ *	printable data.
+ * Ptr -- pointer to some specific structure.  Just print as hex for now.
+ * Quad -- a double-word value.  e.g., lseek(int, offset_t, int)
+ * Stat -- a pointer to a stat buffer.  Currently unused.
+ *
+ * In addition, the pointer types (String, Ptr) may have OUT masked in --
+ * this means that the data is set on *return* from the system call -- or
+ * IN (meaning that the data is passed *into* the system call).
+ */
+/*
+ * $Id$
+ */
+
+enum Argtype { None = 1, Hex, Octal, Int, String, Ptr, Stat, Quad };
+
+#define ARG_MASK	0xff
+#define OUT	0x100
+#define IN	/*0x20*/0
+
+struct syscall_args {
+	enum Argtype type;
+	int offset;
+};
+
+struct syscall {
+	char *name;
+	int ret_type;	/* 0, 1, or 2 return values */
+	int nargs;	/* actual number of meaningful arguments */
+			/* Hopefully, no syscalls with > 10 args */
+	struct syscall_args args[10];
+};
+
+struct syscall *get_syscall(const char*);
+char *get_string(int, void*, int);
+char *print_arg(int, struct syscall_args *, unsigned long*);
+void print_syscall(FILE *, const char *, int, char **);