Shared Library Management Routines

The shl_load Shared Library Management Routines

int show_lib_info(shl_t libH)

{

struct shl_descriptor *desc;

if (shl_gethandle(libH, &desc) == -1)

{

fprintf(stderr, "Invalid library handle.\\n"); return -1;

}

 

printf("library path:

%s\\n", desc->filename);

printf("text start:

%#10lx\\n", desc->tstart);

printf("text end:

%#10lx\\n", desc->tend);

printf("data start:

%#10lx\\n", desc->dstart);

printf("data end:

%#10lx\\n", desc->dend);

return 0;

 

}

The shl_definesym Routine

Adds new symbols to the global shared library symbol table.

Syntax

int shl_definesym( const char *sym, short type, long value,

int flags )

Parameters

sym

A null-terminated string containing the name of the

 

symbol to change or to add to the process's shared

 

library symbol table.

type

The type of symbol — either TYPE_PROCEDURE or

 

TYPE_DATA.

value

If value falls in the address range of a currently loaded

 

library, an association will be made and the symbol is

 

undefined when the library is unloaded. (Note that

 

memory dynamically allocated with malloc(3C) does

 

not fall in the range of any library.) The defined symbol

 

may be overridden by a subsequent call to this routine

 

or by loading a more visible library that provides a

 

definition for the symbol.

flags

Must be set to zero.

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Kenwood HP 9000 manual Shldefinesym Routine

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