Shared Library Management Routines

The shl_load Shared Library Management Routines

Return Value

If successful, shl_definesym returns 0. Otherwise, it returns −1 and sets errno accordingly. See shl_definesym(3X) for details.

Description

The shl_definesym function allows you to add a new symbol to the global shared library symbol table. Use of this routine will be unnecessary for most programmers.

There are two main reasons to add or change shared library symbol table entries:

•to generate symbol definitions as the program runs — for example, aliasing one symbol with another

•to override a current definition

Symbol definitions in the incomplete executable may also be redefined with certain restrictions:

•The incomplete executable always uses its own definition for any data (storage) symbol, even if a more visible one is provided.

•The incomplete executable only uses a more visible code symbol if the main program itself does not provide a definition.

The shl_getsymbols Routine

The shl_getsymbols function retrieves symbols that are imported (referenced) or exported (defined) by a shared library. This information is returned in an allocated array of records, one for each symbol. Most programmers do not need to use this routine.

Syntax

int shl_getsymbols( shl_t handle, short type, int flags,

void * (*memfunc)(),

struct shl_symbol **symbols )

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HP 9000 specifications

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