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- /*
- Data access
- */
- /* $Id$ */
- #include <em_abs.h>
- #include "logging.h"
- #include "nofloat.h"
- #include "global.h"
- #include "log.h"
- #include "trap.h"
- #include "warn.h"
- #include "alloc.h"
- #include "memdirect.h"
- #include "mem.h"
- #include "shadow.h"
- #define HEAPSIZE 1000L /* initial heap size */
- extern size maxheap; /* from main.c */
- #ifdef LOGGING
- char *data_sh; /* shadowbytes */
- #endif /* LOGGING */
- PRIVATE warn_dtbits();
- init_data(hb)
- ptr hb;
- {
- HB = hb; /* set Heap Base */
- HP = HB; /* initialize Heap Pointer */
- HL = HB + HEAPSIZE; /* initialize Heap Limit */
- data = Malloc((size)p2i(HL), "data space");
- #ifdef LOGGING
- data_sh = Malloc((size)p2i(HL), "shadowspace for data");
- dt_clear_area(i2p(0), HL);
- #endif /* LOGGING */
- }
- /********************************************************
- * EM-register division. *
- ********************************************************
- * *
- * newHP(p) - check and adjust HeapPointer. *
- * *
- ********************************************************/
- newHP(ap)
- ptr ap;
- {
- register ptr p = ap;
- if (in_gda(p)) {
- wtrap(WHPGDA, EHEAP);
- }
- if (in_stack(p)) {
- wtrap(WHPSTACK, EHEAP);
- }
- if (!is_wordaligned(p)) {
- wtrap(WHPODD, EHEAP);
- }
- if (maxheap) {
- /* more than allowed on command line */
- if (p - HB > maxheap) {
- warning(WEHEAP);
- trap(EHEAP);
- }
- }
- if (p > HL) {
- /* extend heap space */
- HL = i2p(allocfrac(p2i(p)) - 1);
- data = Realloc(data, (size)(p2i(HL) + 1), "heap space");
- #ifdef LOGGING
- data_sh = Realloc(data_sh, (size)(p2i(HL) + 1),
- "shadowspace for heap");
- #endif /* LOGGING */
- }
- #ifdef LOGGING
- if (p > HP) {
- dt_clear_area(HP, p);
- }
- #endif /* LOGGING */
- HP = p;
- }
- /************************************************************************
- * Data store division. *
- ************************************************************************
- * *
- * dt_stdp(addr, p) - STore Data Pointer. *
- * dt_stn(addr, l, n) - STore N byte integer. *
- * dt_stw(addr, l) - STore wsize byte integer. *
- * dt_stf(addr, f, n) - STore n byte Floating point number. *
- * *
- ************************************************************************/
- dt_stdp(addr, ap)
- register ptr addr;
- ptr ap;
- {
- register int i;
- register long p = (long) ap;
- LOG(("@g6 dt_stdp(%lu, %lu)", addr, p));
- ch_in_data(addr, psize);
- ch_wordaligned(addr);
- for (i = (int) psize; i > 0; i--, addr++) {
- ch_dt_prot(addr);
- data_loc(addr) = (char) (p);
- dt_dp(addr);
- p = p>>8;
- }
- }
- dt_stip(addr, ap)
- register ptr addr;
- ptr ap;
- {
- register int i;
- register long p = (long) ap;
- LOG(("@g6 dt_stip(%lu, %lu)", addr, p));
- ch_in_data(addr, psize);
- ch_wordaligned(addr);
- for (i = (int) psize; i > 0; i--, addr++) {
- ch_dt_prot(addr);
- data_loc(addr) = (char) (p);
- dt_ip(addr);
- p = p>>8;
- }
- }
- dt_stn(addr, al, n)
- register ptr addr;
- long al;
- size n;
- {
- register int i;
- register long l = al;
- #ifdef LOGGING
- /* a psize zero is ambiguous */
- int sh_flags = (l == 0 && n == psize) ? (SH_INT|SH_DATAP) : SH_INT;
- #endif /* LOGGING */
- LOG(("@g6 dt_stn(%lu, %lu, %lu)", addr, l, n));
- ch_in_data(addr, n);
- ch_aligned(addr, n);
- for (i = (int) n; i > 0; i--, addr++) {
- ch_dt_prot(addr);
- data_loc(addr) = (char) l;
- #ifdef LOGGING
- dt_sh(addr) = sh_flags;
- #endif /* LOGGING */
- l = l>>8;
- }
- }
- dt_stw(addr, al)
- register ptr addr;
- long al;
- {
- register int i;
- register long l = al;
- #ifdef LOGGING
- /* a psize zero is ambiguous */
- int sh_flags = (l == 0 && wsize == psize) ? (SH_INT|SH_DATAP) : SH_INT;
- #endif /* LOGGING */
- LOG(("@g6 dt_stw(%lu, %lu)", addr, l));
- ch_in_data(addr, wsize);
- ch_wordaligned(addr);
- for (i = (int) wsize; i > 0; i--, addr++) {
- ch_dt_prot(addr);
- data_loc(addr) = (char) l;
- #ifdef LOGGING
- dt_sh(addr) = sh_flags;
- #endif /* LOGGING */
- l = l>>8;
- }
- }
- #ifndef NOFLOAT
- dt_stf(addr, f, n)
- register ptr addr;
- double f;
- register size n;
- {
- register char *cp = (char *) &f;
- register int i;
- float fl;
- LOG(("@g6 dt_stf(%lu, %g, %lu)", addr, f, n));
- ch_in_data(addr, n);
- ch_wordaligned(addr);
- if ((int) n == 4) {
- fl = f;
- cp = (char *) &fl;
- }
- for (i = (int) n; i > 0; i--, addr++) {
- ch_dt_prot(addr);
- data_loc(addr) = *cp++;
- dt_fl(addr);
- }
- }
- #endif /* NOFLOAT */
- /************************************************************************
- * Data load division. *
- ************************************************************************
- * *
- * dt_lddp(addr) - LoaD Data Pointer from data. *
- * dt_ldip(addr) - LoaD Instruction Pointer from data. *
- * dt_ldu(addr, n) - LoaD n Unsigned bytes from data. *
- * dt_lduw(addr) - LoaD wsize Unsigned bytes from data. *
- * dt_lds(addr, n) - LoaD n Signed bytes from data. *
- * dt_ldsw(addr) - LoaD wsize Signed bytes from data. *
- * *
- ************************************************************************/
- ptr dt_lddp(addr)
- register ptr addr;
- {
- register ptr p;
- LOG(("@g6 dt_lddp(%lu)", addr));
- ch_in_data(addr, psize);
- ch_wordaligned(addr);
- #ifdef LOGGING
- if (!is_dt_set(addr, psize, SH_DATAP)) {
- warning(WGDPEXP);
- warn_dtbits(addr, psize);
- }
- #endif /* LOGGING */
- p = p_in_data(addr);
- LOG(("@g6 dt_lddp() returns %lu", p));
- return (p);
- }
- ptr dt_ldip(addr)
- register ptr addr;
- {
- register ptr p;
- LOG(("@g6 dt_ldip(%lu)", addr));
- ch_in_data(addr, psize);
- ch_wordaligned(addr);
- #ifdef LOGGING
- if (!is_dt_set(addr, psize, SH_INSP)) {
- warning(WGIPEXP);
- warn_dtbits(addr, psize);
- }
- #endif /* LOGGING */
- p = p_in_data(addr);
- LOG(("@g6 dt_ldip() returns %lu", p));
- return (p);
- }
- unsigned long dt_ldu(addr, n)
- register ptr addr;
- size n;
- {
- register int i;
- register unsigned long u = 0;
- LOG(("@g6 dt_ldu(%lu, %lu)", addr, n));
- ch_in_data(addr, n);
- ch_aligned(addr, n);
- #ifdef LOGGING
- if (!is_dt_set(addr, n, SH_INT)) {
- warning(n == 1 ? WGCEXP : WGIEXP);
- warn_dtbits(addr, n);
- }
- #endif /* LOGGING */
- addr += n-1;
- for (i = (int) n-1; i >= 0; i--, addr--) {
- u = (u<<8) | btou(data_loc(addr));
- }
- LOG(("@g6 dt_ldu() returns %lu", u));
- return (u);
- }
- unsigned long dt_lduw(addr)
- register ptr addr;
- {
- register int i;
- register unsigned long u = 0;
- LOG(("@g6 dt_lduw(%lu)", addr));
- ch_in_data(addr, wsize);
- ch_wordaligned(addr);
- #ifdef LOGGING
- if (!is_dt_set(addr, wsize, SH_INT)) {
- warning(WGIEXP);
- warn_dtbits(addr, wsize);
- }
- #endif /* LOGGING */
- addr += wsize-1;
- for (i = (int) wsize-1; i >= 0; i--, addr--) {
- u = (u<<8) | btou(data_loc(addr));
- }
- LOG(("@g6 dt_lduw() returns %lu", u));
- return (u);
- }
- long dt_lds(addr, n)
- register ptr addr;
- size n;
- {
- register int i;
- register long l;
- LOG(("@g6 dt_lds(%lu, %lu)", addr, n));
- ch_in_data(addr, n);
- ch_aligned(addr, n);
- #ifdef LOGGING
- if (!is_dt_set(addr, n, SH_INT)) {
- warning(n == 1 ? WGCEXP : WGIEXP);
- warn_dtbits(addr, n);
- }
- #endif /* LOGGING */
- addr += n-2;
- l = btos(data_loc(addr + 1));
- for (i = n - 2; i >= 0; i--, addr--) {
- l = (l<<8) | btol(data_loc(addr));
- }
- LOG(("@g6 dt_lds() returns %lu", l));
- return (l);
- }
- long dt_ldsw(addr)
- register ptr addr;
- {
- register int i;
- register long l;
- LOG(("@g6 dt_ldsw(%lu)", addr));
- ch_in_data(addr, wsize);
- ch_wordaligned(addr);
- #ifdef LOGGING
- if (!is_dt_set(addr, wsize, SH_INT)) {
- warning(WGIEXP);
- warn_dtbits(addr, wsize);
- }
- #endif /* LOGGING */
- addr += wsize-2;
- l = btos(data_loc(addr + 1));
- for (i = wsize - 2; i >= 0; i--, addr--) {
- l = (l<<8) | btol(data_loc(addr));
- }
- LOG(("@g6 dt_ldsw() returns %lu", l));
- return (l);
- }
- /************************************************************************
- * Data move division *
- ************************************************************************
- * *
- * dt_mvd(d2, d1, n) - Move n bytes in data from d1 to d2. *
- * dt_mvs(d, s, n) - Move n bytes from s in stack to d in data. *
- * *
- * See st_mvs() in stack.c for a description. *
- * *
- ************************************************************************/
- dt_mvd(d2, d1, n) /* d1 -> d2 */
- register ptr d2, d1;
- size n;
- {
- register int i;
- ch_in_data(d1, n);
- ch_wordaligned(d1);
- ch_in_data(d2, n);
- ch_wordaligned(d2);
- for (i = (int) n; i > 0; i--, d1++, d2++) {
- ch_dt_prot(d2);
- data_loc(d2) = data_loc(d1);
- #ifdef LOGGING
- dt_sh(d2) = dt_sh(d1) & ~SH_PROT;
- #endif /* LOGGING */
- }
- }
- dt_mvs(d, s, n) /* s -> d */
- register ptr d, s;
- size n;
- {
- register int i;
- ch_in_stack(s, n);
- ch_wordaligned(s);
- ch_in_data(d, n);
- ch_wordaligned(d);
- for (i = (int) n; i > 0; i--, d++, s++) {
- ch_dt_prot(d);
- ch_st_prot(s);
- data_loc(d) = stack_loc(s);
- #ifdef LOGGING
- dt_sh(d) = st_sh(s) & ~SH_PROT;
- #endif /* LOGGING */
- }
- }
- #ifdef LOGGING
- PRIVATE warn_dtbits(addr, n)
- register ptr addr;
- register size n;
- {
- register int or_bits = 0;
- register int and_bits = 0xff;
- while (n--) {
- or_bits |= dt_sh(addr);
- and_bits &= dt_sh(addr);
- addr++;
- }
- if (or_bits != and_bits) {
- /* no use trying to diagnose */
- warningcont(WWASMISC);
- return;
- }
- if (or_bits == 0)
- warningcont(WWASUND);
- if (or_bits & SH_INT)
- warningcont(WWASINT);
- if (or_bits & SH_FLOAT)
- warningcont(WWASFLOAT);
- if (or_bits & SH_DATAP)
- warningcont(WWASDATAP);
- if (or_bits & SH_INSP)
- warningcont(WWASINSP);
- }
- #endif /* LOGGING */
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