372 lines
7.2 KiB
C
372 lines
7.2 KiB
C
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/*
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Data access
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*/
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/* $Header$ */
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#include <em_abs.h>
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#include "logging.h"
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#include "nofloat.h"
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#include "global.h"
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#include "log.h"
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#include "trap.h"
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#include "warn.h"
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#include "alloc.h"
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#include "memdirect.h"
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#include "mem.h"
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#include "shadow.h"
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#define HEAPSIZE 1000L /* initial heap size */
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extern size maxheap; /* from main.c */
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#ifdef LOGGING
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char *data_sh; /* shadowbytes */
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#endif LOGGING
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PRIVATE warn_dtbits();
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init_data(hb)
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ptr hb;
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{
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HB = hb; /* set Heap Base */
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HP = HB; /* initialize Heap Pointer */
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HL = HB + HEAPSIZE; /* initialize Heap Limit */
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data = Malloc((size)p2i(HL), "data space");
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#ifdef LOGGING
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data_sh = Malloc((size)p2i(HL), "shadowspace for data");
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dt_clear_area(i2p(0), HL);
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#endif LOGGING
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}
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/********************************************************
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* EM-register division. *
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********************************************************
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* *
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* newHP(p) - check and adjust HeapPointer. *
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* *
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********************************************************/
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newHP(ap)
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ptr ap;
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{
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register ptr p = ap;
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if (in_gda(p)) {
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wtrap(WHPGDA, EHEAP);
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}
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if (in_stack(p)) {
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wtrap(WHPSTACK, EHEAP);
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}
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if (!is_aligned(p, wsize)) {
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wtrap(WHPODD, EHEAP);
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}
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if (maxheap) {
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/* more than allowed on command line */
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if (p - HB > maxheap) {
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warning(WEHEAP);
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trap(EHEAP);
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}
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}
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if (p > HL) {
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/* extend heap space */
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HL = i2p(allocfrac(p2i(p)) - 1);
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data = Realloc(data, (size)(p2i(HL) + 1), "heap space");
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#ifdef LOGGING
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data_sh = Realloc(data_sh, (size)(p2i(HL) + 1),
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"shadowspace for heap");
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#endif LOGGING
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}
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#ifdef LOGGING
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if (p > HP) {
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dt_clear_area(HP, p);
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}
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#endif LOGGING
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HP = p;
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}
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/************************************************************************
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* Data store division. *
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************************************************************************
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* *
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* dt_stdp(addr, p) - STore Data Pointer. *
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* dt_stn(addr, l, n) - STore N byte integer. *
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* dt_stf(addr, f, n) - STore n byte Floating point number. *
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* *
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************************************************************************/
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dt_stdp(addr, ap)
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ptr addr, ap;
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{
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register int i;
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register long p = (long) ap;
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LOG(("@g6 dt_stdp(%lu, %lu)", addr, p));
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ch_in_data(addr, psize);
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ch_aligned(addr, wsize);
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for (i = 0; i < (int) psize; i++) {
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ch_dt_prot(addr + i);
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data_loc(addr + i) = (char) (p);
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dt_dp(addr + i);
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p = p>>8;
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}
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}
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dt_stip(addr, ap)
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ptr addr, ap;
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{
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register int i;
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register long p = (long) ap;
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LOG(("@g6 dt_stip(%lu, %lu)", addr, p));
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ch_in_data(addr, psize);
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ch_aligned(addr, wsize);
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for (i = 0; i < (int) psize; i++) {
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ch_dt_prot(addr + i);
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data_loc(addr + i) = (char) (p);
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dt_ip(addr + i);
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p = p>>8;
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}
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}
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dt_stn(addr, al, n)
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ptr addr;
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long al;
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size n;
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{
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register int i;
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register long l = al;
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LOG(("@g6 dt_stn(%lu, %lu, %lu)", addr, l, n));
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ch_in_data(addr, n);
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ch_aligned(addr, n);
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for (i = 0; i < (int) n; i++) {
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ch_dt_prot(addr + i);
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data_loc(addr + i) = (char) l;
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#ifdef LOGGING
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if (al == 0 && n == psize) {
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/* a psize zero, ambiguous */
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dt_sh(addr + i) = (SH_INT|SH_DATAP);
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}
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else {
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dt_sh(addr + i) = SH_INT;
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}
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#endif LOGGING
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l = l>>8;
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}
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}
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#ifndef NOFLOAT
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dt_stf(addr, f, n)
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ptr addr;
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double f;
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size n;
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{
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register char *cp = (char *) &f;
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register int i;
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LOG(("@g6 dt_stf(%lu, %g, %lu)", addr, f, n));
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ch_in_data(addr, n);
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ch_aligned(addr, wsize);
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for (i = 0; i < (int) n; i++) {
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ch_dt_prot(addr + i);
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data_loc(addr + i) = *cp++;
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dt_fl(addr + i);
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}
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}
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#endif NOFLOAT
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/************************************************************************
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* Data load division. *
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************************************************************************
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* *
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* dt_lddp(addr) - LoaD Data Pointer from data. *
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* dt_ldip(addr) - LoaD Instruction Pointer from data. *
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* dt_ldu(addr, n) - LoaD n Unsigned bytes from data. *
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* dt_lds(addr, n) - LoaD n Signed bytes from data. *
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* *
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************************************************************************/
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ptr dt_lddp(addr)
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ptr addr;
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{
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register ptr p;
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LOG(("@g6 dt_lddp(%lu)", addr));
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ch_in_data(addr, psize);
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ch_aligned(addr, wsize);
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#ifdef LOGGING
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if (!is_dt_set(addr, psize, SH_DATAP)) {
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warning(WGDPEXP);
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warn_dtbits(addr, psize);
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}
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#endif LOGGING
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p = p_in_data(addr);
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LOG(("@g6 dt_lddp() returns %lu", p));
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return (p);
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}
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ptr dt_ldip(addr)
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ptr addr;
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{
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register ptr p;
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LOG(("@g6 dt_ldip(%lu)", addr));
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ch_in_data(addr, psize);
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ch_aligned(addr, wsize);
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#ifdef LOGGING
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if (!is_dt_set(addr, psize, SH_INSP)) {
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warning(WGIPEXP);
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warn_dtbits(addr, psize);
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}
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#endif LOGGING
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p = p_in_data(addr);
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LOG(("@g6 dt_ldip() returns %lu", p));
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return (p);
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}
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unsigned long dt_ldu(addr, n)
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ptr addr;
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size n;
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{
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register int i;
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register unsigned long u = 0;
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LOG(("@g6 dt_ldu(%lu, %lu)", addr, n));
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ch_in_data(addr, n);
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ch_aligned(addr, n);
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#ifdef LOGGING
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if (!is_dt_set(addr, n, SH_INT)) {
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warning(n == 1 ? WGCEXP : WGIEXP);
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warn_dtbits(addr, n);
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}
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#endif LOGGING
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for (i = (int) n-1; i >= 0; i--) {
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u = (u<<8) | btou(data_loc(addr + i));
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}
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LOG(("@g6 dt_ldu() returns %lu", u));
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return (u);
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}
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long dt_lds(addr, n)
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ptr addr;
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size n;
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{
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register int i;
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register long l;
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LOG(("@g6 dt_lds(%lu, %lu)", addr, n));
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ch_in_data(addr, n);
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ch_aligned(addr, n);
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#ifdef LOGGING
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if (!is_dt_set(addr, n, SH_INT)) {
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warning(n == 1 ? WGCEXP : WGIEXP);
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warn_dtbits(addr, n);
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}
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#endif LOGGING
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l = btos(data_loc(addr + n - 1));
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for (i = n - 2; i >= 0; i--) {
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l = (l<<8) | btol(data_loc(addr + i));
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}
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LOG(("@g6 dt_lds() returns %lu", l));
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return (l);
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}
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/************************************************************************
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* Data move division *
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************************************************************************
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* *
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* dt_mvd(d2, d1, n) - Move n bytes in data from d1 to d2. *
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* dt_mvs(d, s, n) - Move n bytes from s in stack to d in data. *
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* *
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* See st_mvs() in stack.c for a description. *
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* *
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************************************************************************/
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dt_mvd(d2, d1, n) /* d1 -> d2 */
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ptr d2, d1;
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size n;
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{
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register int i;
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ch_in_data(d1, n);
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ch_aligned(d1, wsize);
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ch_in_data(d2, n);
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ch_aligned(d2, wsize);
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for (i = 0; i < (int) n; i++) {
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ch_dt_prot(d2 + i);
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data_loc(d2 + i) = data_loc(d1 + i);
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#ifdef LOGGING
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dt_sh(d2 + i) = dt_sh(d1 + i) & ~SH_PROT;
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#endif LOGGING
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}
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}
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dt_mvs(d, s, n) /* s -> d */
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ptr d, s;
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size n;
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{
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register int i;
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ch_in_stack(s, n);
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ch_aligned(s, wsize);
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ch_in_data(d, n);
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ch_aligned(d, wsize);
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for (i = 0; i < (int) n; i++) {
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ch_dt_prot(d + i);
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ch_st_prot(s + i);
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data_loc(d + i) = stack_loc(s + i);
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#ifdef LOGGING
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dt_sh(d + i) = st_sh(s + i) & ~SH_PROT;
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#endif LOGGING
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}
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}
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#ifdef LOGGING
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PRIVATE warn_dtbits(addr, n)
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ptr addr;
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size n;
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{
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register int or_bits = 0;
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register int and_bits = 0xff;
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while (n--) {
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or_bits |= dt_sh(addr);
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and_bits &= dt_sh(addr);
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addr++;
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}
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if (or_bits != and_bits) {
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/* no use trying to diagnose */
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warningcont(WWASMISC);
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return;
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}
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if (or_bits == 0)
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warningcont(WWASUND);
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if (or_bits & SH_INT)
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warningcont(WWASINT);
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if (or_bits & SH_FLOAT)
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warningcont(WWASFLOAT);
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if (or_bits & SH_DATAP)
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warningcont(WWASDATAP);
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if (or_bits & SH_INSP)
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warningcont(WWASINSP);
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}
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#endif LOGGING
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