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KLDSYM(2)		 DragonFly System Calls Manual		     KLDSYM(2)

NAME

kldsym -- look up address by symbol name in a KLD

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <sys/param.h> #include <sys/linker.h> int kldsym(int fileid, int command, void *data);

DESCRIPTION

The kldsym() function returns the address of the symbol specified in data in the module specified by fileid. Currently, the only command imple- mented 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

The kldsym() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

ERRORS

The kldsym() function will fail if: [EINVAL] Invalid value in data->version or command. [ENOENT] fileid 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() function first appeared in FreeBSD 3.0. DragonFly 3.9 July 26, 2001 DragonFly 3.9