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/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#include <stdio.h>
#define import_kernel
#define import_knames
#define import_spp
#include <iraf.h>
#ifdef SOLARIS
#define SUNOS
#endif
extern unsigned VSHLIB[], VSHEND; /* shared library descriptor */
/* ZLOCPR -- Return the entry point address of a procedure as a magic
* integer value. A subsequent call to one of the ZCALL primitives is used
* to call the procedure.
*/
int
ZLOCPR (
PFI proc, /* procedure for which we desire address */
XINT *o_epa /* entry point address */
)
{
register unsigned *epa = (unsigned *) proc;
*o_epa = (XINT) epa;
#ifdef SUNOS
/* Return immediately if the shared library is not in use. */
if (VSHLIB[0] == 0)
return (XOK);
/* If the shared library is in use and the reference procedure is
* a transfer vector, return the address of the actual function.
* This is necessary to permit equality comparisons when ZLOCPR
* is called to reference the same procedure in both the shared
* library image and the client process.
*/
if (epa < VSHLIB || epa >= (unsigned *)&VSHEND)
return (XOK);
/* Disassemble the JMP instruction in the transfer vector to get the
* address of the referenced procedure in the shared library. [MACHDEP]
*/
#ifdef i386
*o_epa = (XINT)((unsigned)epa + *((unsigned *)((char *)epa + 1)) + 5);
#else
#ifdef mc68000
*o_epa = (XINT)(*((unsigned *)((char *)epa + 2)));
#else
#ifdef sparc
*o_epa = (XINT)(((*epa & 0x3fffff) << 10) | (*(epa+1) & 0x3ff));
#endif
#endif
#endif
#endif
return (XOK);
}
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