89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
#include <system.h>
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#include <out.h>
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#include "back.h"
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/* Solve the local references.
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*/
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#define seg_index( s) ( nname - SEGBSS - 1 + s)
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long get4();
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extern short get2();
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extern char get1();
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do_local_relocation()
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/* Check if this reference is solvable. External references contain
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* -1 in 'on_valu'.
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*/
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{
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register struct outrelo *ptr;
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register int s;
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for ( ptr = reloc_info; ptr < relo; ptr++) {
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s = ptr->or_nami;
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if ( symbol_table[ s].on_valu != -1)
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do_relo(&symbol_table[ s], ptr);
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}
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}
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do_relo(np,rp)
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struct outname *np;
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struct outrelo *rp;
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/* Solve the reference relative to the start of the segment where the symbol
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* is defined.
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*/
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{
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long oldval,newval;
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char *sect;
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switch( rp->or_sect - S_MIN) {
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case SEGTXT:
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sect = text_area;
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break;
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case SEGCON:
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sect = data_area;
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break;
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default:
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fprint( STDERR,
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"do_local_relo(): bad section %d\n",
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rp->or_sect - S_MIN);
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break;
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}
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if ( rp->or_type & RELO4) {
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oldval = get4( sect, rp->or_addr);
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newval = oldval + np->on_valu;
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put4( sect, rp->or_addr, newval);
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rp->or_nami = seg_index(
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( symbol_table[ rp->or_nami].on_type & S_TYP) - S_MIN);
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}
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else if ( rp->or_type & RELO2) {
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oldval = (long) get2( sect, rp->or_addr);
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newval = oldval + np->on_valu;
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put2( sect, rp->or_addr, (int) newval);
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rp->or_nami = seg_index(
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( symbol_table[ rp->or_nami].on_type & S_TYP) - S_MIN);
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}
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else if ( rp->or_type & RELO1) {
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oldval = (long) get1( sect, rp->or_addr);
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newval = oldval + np->on_valu;
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put1( sect, rp->or_addr, (char) newval);
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rp->or_nami = seg_index(
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( symbol_table[ rp->or_nami].on_type & S_TYP) - S_MIN);
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}
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else
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print( STDERR, "do_relo() : bad relocation size\n");
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/* print(
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"reloc %s adrr=%ld sect=%ld oldval=%ld newval=%ld def = %ld\n",
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np->on_foff+string_area, rp->or_addr, rp->or_sect-S_MIN, oldval, newval, np->on_valu);
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*/
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}
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