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Man Pages


Manual Reference Pages  -  KLDSYM (2)

NAME

kldsym - look up address by symbol name in a KLD

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
History

LIBRARY


.Lb libc

SYNOPSIS


.In sys/param.h
.In sys/linker.h int kldsym int fileid int command void *data

DESCRIPTION

The kldsym system call returns the address of the symbol specified in data in the module specified by fileid. If fileid is 0, all loaded modules are searched. Currently, the only command implemented is KLDSYM_LOOKUP.

The data argument is of the following structure:

struct kld_sym_lookup {
    int         version;        /* sizeof(struct kld_sym_lookup) */
    char        *symname;       /* Symbol name we are looking up */
    u_long      symvalue;
    size_t      symsize;
};

The version member is to be set by the code calling kldsym to sizeof struct kld_sym_lookup. The next two members, version and symname, are specified by the user. The last two, symvalue and symsize, are filled in by kldsym and contain the address associated with symname and the size of the data it points to, respectively.

RETURN VALUES


.Rv -std kldsym

ERRORS

The kldsym system call will fail if:
[EINVAL]
  Invalid value in data->version or command.
[ENOENT]
  The fileid argument is invalid, or the specified symbol could not be found.

SEE ALSO

kldfind(2), kldfirstmod(2), kldload(2), kldnext(2), kldunload(2), modfind(2), modnext(2), modstat(2), kld(4)

HISTORY

The kldsym system call first appeared in
.Fx 3.0 .
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