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