get_kernel_syms(2)

1get_kernel_syms(2)            System Calls Manual           get_kernel_syms(2)
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NAME

6       get_kernel_syms - retrieve exported kernel and module symbols
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SYNOPSIS

9       #include <linux/module.h>
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11       [[deprecated]] int get_kernel_syms(struct kernel_sym *table);
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DESCRIPTION

14       Note: This system call is present only before Linux 2.6.
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16       If  table  is  NULL,  get_kernel_syms()  returns  the number of symbols
17       available for query.  Otherwise, it fills in a table of structures:
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19           struct kernel_sym {
20               unsigned long value;
21               char          name[60];
22           };
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24       The symbols are interspersed with magic symbols of  the  form  #module-
25       name with the kernel having an empty name.  The value associated with a
26       symbol of this form is the address at which the module is loaded.
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28       The symbols exported from each module follow their magic module tag and
29       the modules are returned in the reverse of the order in which they were
30       loaded.
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RETURN VALUE

33       On success, returns the number of symbols copied to table.   On  error,
34       -1 is returned and errno is set to indicate the error.
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ERRORS

37       There is only one possible error return:
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39       ENOSYS get_kernel_syms()  is  not supported in this version of the ker‐
40              nel.
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STANDARDS

43       Linux.
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HISTORY

46       Removed in Linux 2.6.
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48       This obsolete system call is not supported by glibc.  No declaration is
49       provided  in glibc headers, but, through a quirk of history, glibc ver‐
50       sions before glibc 2.23 did export an ABI for this system call.  There‐
51       fore,  in  order to employ this system call, it was sufficient to manu‐
52       ally declare the interface in your code; alternatively, you  could  in‐
53       voke the system call using syscall(2).
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BUGS

56       There is no way to indicate the size of the buffer allocated for table.
57       If symbols have been added to the kernel since the program queried  for
58       the symbol table size, memory will be corrupted.
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60       The length of exported symbol names is limited to 59 characters.
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62       Because  of  these limitations, this system call is deprecated in favor
63       of query_module(2) (which is itself nowadays  deprecated  in  favor  of
64       other interfaces described on its manual page).
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