63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/* $Id$ */
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* S H A R E D F I L E
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*
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* I N I T _ G L O B L S
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*
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*/
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#include "types.h"
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#include "debug.h"
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#include "global.h"
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#include "alloc.h"
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#include "map.h"
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extern short nrglobals;
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init_globals()
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{
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/* Assign a 'global variable number (o_globnr) to
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* every global variable for which we want to
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* maintain ud-info. We do not maintain ud-info
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* for a global variable if:
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* - it is part of a ROM data block (so it will never be changed)
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* - it's size is not known
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* - it overlaps another variable (e.g. LOE X+2 ; LDE X)
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*/
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dblock_p d;
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obj_p obj, prev = 0;
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short nr = 1;
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offset ill_zone, x;
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for (d = fdblock; d != (dblock_p) 0; d = d->d_next) {
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ill_zone = (offset) 0;
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for (obj = d->d_objlist; obj != (obj_p) 0; obj = obj->o_next) {
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if (d->d_pseudo == DROM ||
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obj->o_size == UNKNOWN_SIZE) {
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obj->o_globnr = 0; /* var. not considered */
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continue;
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}
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if (obj->o_off < ill_zone) {
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obj->o_globnr = 0; /* var. not considered */
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if (prev != (obj_p) 0 && prev->o_globnr != 0) {
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prev->o_globnr = 0;
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nr--;
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}
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} else {
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obj->o_globnr = nr++;
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}
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if ((x = obj->o_off + obj->o_size) > ill_zone) {
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ill_zone = x;
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}
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prev = obj;
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}
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}
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nrglobals = nr -1;
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}
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