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ds.c
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/*
* File created 14.11.2021, last modified 07.01.2022
*
* The ds.c file is part of the restored LINK.COM program
* from the Hi-Tech C compiler v3.09 package.
*
* Andrey Nikitin & Mark Ogden 07.01.2022
*/
#include <stdio.h>
#include <string.h>
#if CPM
#include <sys.h>
#endif
#include "link.h"
/* link / load modes */
#define CALCULATE 1
#define EXPLICIT 2
/**************************************************************************
60 finPass1 ok++ (PMO)
*
* One very minor code variance where the load order of a & hl is swapped.
* There is no impact on execution
**************************************************************************/
void finPass1() {
char buff[20];
sym_t **pslot;
psect_t *pinfo;
psect_t *pp;
char linkMode;
char loadMode;
char *psectSpec;
char *s;
char separator;
register sym_t *ps = NULL; /* PMO: if not key_R then ps may be used uninitialised */
loadAddress = 0;
linkAddress = 0;
maxLinkAddress = 0;
if (!key_R && psect_location) {
psectSpec = psect_location;
for (;;) {
if (!*psectSpec) {
simpl_err("bad '-p' format");
break;
}
for (s = psectSpec; *s && *s != '=' && *s != ',' && *s != '/'; s++)
;
separator = *s;
*s = '\0';
if ((ps = getSymbol(psectSpec, SF_PSECT)) == 0 &&
(ps = getSymbol(psectSpec, SF_CLASS)) == 0)
fatal_err("unknown psect: %s", psectSpec);
if (ps->flags & SF_ABS)
simpl_err("psect is absolute: %s", psectSpec);
pinfo = ps->p.pinfo;
if (pinfo->originSet)
fatal_err("psect origin multiply defined: %s", psectSpec);
(psectSpec = s)[0] = separator; /* Put back separator */
if (pinfo->align != 0) {
linkAddress += (pinfo->align - 1);
linkAddress &= ~(pinfo->align - 1L);
loadAddress += (pinfo->align - 1);
loadAddress &= ~(pinfo->align - 1L);
}
linkMode = loadMode = CALCULATE;
saveLoadAddress = loadAddress;
if (separator == '=') {
++psectSpec;
if (parseLongVal(&psectSpec, &linkAddress) != 0) { /* Link address */
fatal_err("bad origin format in spec");
break;
}
loadAddress = linkAddress;
linkMode = EXPLICIT;
if (*psectSpec != '/')
loadMode = EXPLICIT;
}
if (*psectSpec == '/') {
loadMode = CALCULATE;
++psectSpec;
if (parseLongVal(&psectSpec, &loadAddress) != 0) /* Load address */
loadAddress = saveLoadAddress;
else
loadMode = EXPLICIT;
}
if (ps->flags & SF_PSECT) {
pinfo->linkAddress = linkAddress;
if (pinfo->align != 0 && (linkAddress & (pinfo->align - 1)))
fatal_err("Psect %s not relocated on 0x%x boundary", pinfo->psectSym->name,
pinfo->align);
if (maxLinkAddress < (linkAddress += pinfo->blkStartAddress))
maxLinkAddress = linkAddress;
pinfo->loadAddress = loadAddress;
if (pinfo->align != 0 && (loadAddress & (pinfo->align - 1)))
fatal_err("Psect %s not loaded on 0x%x boundary ", pinfo->psectSym->name,
pinfo->align);
loadAddress += pinfo->blkStartAddress;
pinfo->originSet = true;
} else {
for (pp = psectInfo; pp != nextPsect; pp++) {
if (pp->classSym == ps && !pp->originSet) {
if (linkMode == CALCULATE && pp->align != 0) {
linkAddress += (pp->align - 1); /* align */
linkAddress &= ~(pp->align - 1L);
}
pp->linkAddress = linkAddress;
if (pp->align != 0 && (linkAddress & (pp->align - 1)))
fatal_err("Psect %s not relocated on 0x%x boundary", pp->psectSym->name,
pp->align);
if (maxLinkAddress < pp->blkStartAddress + linkAddress)
maxLinkAddress = pp->blkStartAddress + linkAddress;
if (linkMode == CALCULATE)
linkAddress += pp->blkStartAddress;
if (loadMode == CALCULATE && pp->align != 0) {
loadAddress += (pp->align - 1); /* align */
loadAddress &= ~(pp->align - 1L);
}
pp->loadAddress = loadAddress;
if (pp->align != 0 && (loadAddress & (pp->align - 1)))
fatal_err("Psect %s not loaded on 0x%x boundary ", pp->psectSym->name,
pp->align);
if (loadMode == CALCULATE)
loadAddress += pp->blkStartAddress;
pp->originSet = true;
}
}
}
if (*psectSpec == ',')
psectSpec++;
else {
if (*psectSpec)
fatal_err("bad '-p' format");
break;
}
}
}
for (pinfo = psectInfo; pinfo != nextPsect; pinfo++) {
if (pinfo->maxSize != 0 && pinfo->maxSize < pinfo->blkStartAddress)
simpl_err("psect exceeds max size: %s", pinfo->psectSym->name);
if (key_R) { /* Write records to start each psect */
if (!(pinfo->psectSym->flags & SF_CLASS)) {
conv_u32tob(pinfo->blkStartAddress, (uint8_t *)textRecBuf);
strcpy((char *)textRecBuf + TEXT_PNAME, pinfo->psectSym->name);
writeRec(TEXT_RECORD, (int)strlen((char *)textRecBuf + TEXT_PNAME) + TEXT_PNAME + 1,
textRecBuf);
}
} else {
if (pinfo->originSet == 0 && pinfo->classSym == 0) {
if (pinfo->psectSym->flags & SF_CLASS) {
for (pp = psectInfo; pp != nextPsect; ++pp)
if (!pp->originSet && pp->classSym == ps) /* ps potentially uninitialised */
setPsectOrigin(pp);
} else
setPsectOrigin(pinfo);
}
if ((ps = pinfo->psectSym) != absSym) {
if ((ps->flags & (SF_CLASS | SF_GLOBAL)) == SF_GLOBAL) {
sprintf(buff, "__L%s", ps->name); /* base address */
defineIfNeeded(buff, ps, 0, SF_GLOBAL);
buff[2] = 'H'; /* highest used address */
defineIfNeeded(buff, ps, pinfo->blkStartAddress, SF_GLOBAL);
if (pinfo->loadAddress != pinfo->linkAddress) {
buff[2] = 'B'; /* bias load - link */
defineIfNeeded(buff, ps, pinfo->loadAddress - pinfo->linkAddress,
SF_GLOBAL);
}
}
}
}
pinfo->blkStartAddress = 0; /* Reset for pass 2 */
}
if (!key_R) {
if (cntUnresolved != 0 && !key_I)
simpl_err("undefined symbol%c:", (cntUnresolved == 1) ? '\0' : 's');
/* Update all of the symbol values to reflect final locations */
for (pslot = symbol_table; &symbol_table[MAX_SYMBOLS] != pslot; ++pslot) {
if ((ps = *pslot) && !(ps->flags & (SF_PSECT | SF_CLASS))) {
if (LowFlags(ps->flags) == SF_EXTERN) {
if (!key_I)
simpl_err("%s", ps->name);
} else if (!(ps->psectSym->flags & SF_ABS) && LowFlags(ps->flags) != SF_COMM)
ps->p.value += ps->psectSym->p.pinfo->linkAddress;
}
}
}
if (key_S)
return;
for (pslot = symbol_table; &symbol_table[MAX_SYMBOLS] != pslot; ++pslot) { /* m63: */
if (ps = *pslot) {
if (ps->flags & SF_PSECT) {
if (!key_C) {
wrRecord();
nonTextRecBuf[RECORD_TYPE] = PSECT_RECORD;
conv_u16tob((ps->flags & 0x7fff) | (key_R ? 0 : SF_ABS), nonTextRecPtr);
strcpy((char *)nonTextRecPtr + PSECT_PNAME, ps->name);
nonTextRecPtr += (strlen(ps->name) + PSECT_PNAME + 1);
};
} else if (!(ps->flags & SF_CLASS) && (!key_X || (ps->flags & SF_GLOBAL)) &&
(!key_Z || !isLocalName(ps->name)))
wrSymbol(ps);
}
}
if (key_H)
fprintf(symFp, "%%locals\n");
}