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c.c
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/*
* File created 14.11.2021, last modified 07.01.2022
*
* The c.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 <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if CPM
#include <sys.h>
#endif
#include "link.h"
/**************************************************************************
28 visitSymbols sub_0bc9h ok++ (PMO)
*
* as all actions use type as a uint8_t, the prototype now reflects this
* as a result the optimiser doesn't load the high byte of type
**************************************************************************/
void visitSymbols(vsfuncptr action) {
char moduleBuf[100];
int cnt, type;
for (cnt = symCnt; cnt != 0; --cnt) {
if ((type = fgetc(libraryFp)) == -1)
unexp_eof();
readName(moduleBuf);
action(moduleBuf, type); /* <- chkModuleNeeded(char * offset, int relocType) */
}
}
/**************************************************************************
29 readName sub_0c2eh ok++ (PMO)
**************************************************************************/
void readName(register char *p1) {
int l1;
do {
if ((l1 = fgetc(libraryFp)) == -1)
unexp_eof();
*(p1++) = l1;
} while (l1 != 0);
}
/**************************************************************************
30 unexp_eof sub_0c62h ok++
**************************************************************************/
void unexp_eof() {
badFormat("unexpected end of file");
}
/**************************************************************************
31 main sub_0c6b ok++ (PMO)
**************************************************************************/
int main(int argc, char **argv) {
char *pOption;
#ifndef CPM
moduleFp = stdin;
#endif
#if CPM
if (argc == 1) {
argv = _getargs(0, "link");
argc = _argc_;
}
#endif
create_symtab(); /* PMO: moved before -U option which uses symtab */
for (--argc, ++argv; argc != 0 && **argv == '-'; --argc, ++argv) {
pOption = *argv + 1; /* m2: */
while (*pOption) {
switch (*pOption++) { /* m5: */
case 'R': /* Leave the output relocatable */
case 'r':
key_R = 1; /* m7: */
break;
case 'L': /* Retain absolute relocation info */
case 'l':
if ((*pOption == 'm') || /* m8: */
(*pOption == 'M')) { /* Will retain only segement relocation */
key_LM = 1; /* information m9: */
pOption++; /* m10: */
break;
}
key_L = 1; /*m11: */
break;
case 'N': /* Sort symbols by address */
case 'n':
key_N = 1; /* m12: */
break;
case 'C': /* Produce a binary output file offset */
case 'c':
key_C = 1; /* by value m13: */
parseLongVal(&pOption, &offset_address);
break; /* m14: */
case 'S': /* Strip symbol information from output file */
case 's':
key_S = 1; /* m15: */
case 'X': /* Suppress local symbols in output file */
case 'x':
key_X = 1; /* m16: */
case 'Z': /* Suppress trivial (compiler-generated) */
case 'z':
key_Z = 1; /* symbols in theoutput file m17: */
break;
case 'O': /* Call output file name */
case 'o':
if (fname_outp == 0) { /* m18: */
if (*pOption != 0) {
fname_outp = pOption;
pOption = "";
break;
}
}
fatal_err("Illegal -o flag"); /* m19: */
break;
case 'P': /* Spec is a psectSym location specification */
case 'p':
if (psect_location == 0) { /* m21: */
if (*pOption != 0) {
psect_location = pOption;
pOption = "";
break;
}
}
fatal_err("Illegal -p flag"); /* m22: */
break;
case 'M': /* Write a link map to the file name */
case 'm':
if (fname_map == 0) { /* m23: */
key_M = 1;
fname_map = pOption;
pOption = "";
break;
}
fatal_err("Duplicate -m flag"); /* m24: */
break;
case 'U': /* Make symbol initially undefined */
case 'u':
if (*pOption != 0) { /* m25: */
addSym(pOption, 0x10);
pOption = "";
break;
}
fatal_err("Missing arg to -u"); /* m26: */
break;
case 'H':
case 'h':
key_H = 1; /* m27: */
case 'D': /* Write a symbol file */
case 'd':
if (fname_sym != 0) /* m28: */
fatal_err("Duplicate -d flag");
if (*pOption != 0)
fname_sym = pOption;
else
fname_sym = "l.sym"; /* m30: */
pOption = ""; /* m31: */
break;
case 'W': /* Specify map width */
case 'w':
if (isdigit(*pOption) != 0) { /* m32: */
width = atoi(pOption);
pOption = "";
break;
}
fatal_err("Missing arg to -w"); /* m33: */
break;
case 'I': /* Ignore undefined symbols */
case 'i':
key_I = 1; /* m34: */
break;
default:
fatal_err("Illegal flag %c\n%s", *(pOption - 1), usageMsg); /* m35: */
break;
} /* end switch */
} /* end pOption while */
} /* end argc while */
if (key_C && (key_R || key_L)) {
fprintf(stderr, "-c illegal with -r or -l"); /* m38: */
exit(1);
}
if (argc == 0)
fatal_err(usageMsg); /* m39: */
/* create_symtab(); moved to before option processing as -U uses symbol table m40: */
if (fname_outp == 0) { /* Assign default output file name */
if (key_C)
fname_outp = "l.bin";
else
fname_outp = "l.obj";
}
outFp = fopen(fname_outp, "wb"); /* m42: */
if (outFp == 0)
fatal_err("%s: Can't create", fname_outp);
if (key_M && *fname_map && freopen(fname_map, "w", stdout) == 0)
fatal_err("%s: Can't create", fname_map);
if (fname_sym != 0) { /* m44: */
if ((symFp = fopen(fname_sym, "w")) == 0)
fatal_err("%s: Can't create", fname_sym);
}
absSym = addSym("", SF_PSECT | 0xD0); /* m45: */
num_lib_files = 0;
for (curFileId = 0; argc != curFileId; ++curFileId) { /* m48: */
if (is_library(argv[curFileId]) != 0)
++num_lib_files;
}
allocModuleArrays(num_lib_files);
for (linker_pass = 0; linker_pass < 2; ++linker_pass) { /* m56: */
num_lib_files = 0; /* m49: */
for (curFileId = 0; curFileId < argc; ++curFileId) { /* m54: */
#ifdef CPM
if (freopen((fname_obj = argv[curFileId]), "rb", stdin) == 0) /* m50: */
#else
if (freopen((fname_obj = argv[curFileId]), "rb", stdin) == 0 &&
freopen(mkLibPath(fname_obj), "rb", stdin) == 0)
#endif
fatal_err("%s: Can't open", fname_obj);
if (is_library(fname_obj) != 0) { /* lib file */ /* m51: */
openLibrary();
++num_lib_files;
} else
doObjFile(); /* m52: */
fname_obj = 0; /* m53: */
} /* / finPass1 */
(finPassHandler[linker_pass])();
if (err_num != 0)
exit(1); /* \ finPass2 */
}
exit(0);
} /* End main */
/**************************************************************************
32 doObjFile ok++ (PMO)
**************************************************************************/
void doObjFile() {
do {
readRecHdr();
(recHandler[rectyp][linker_pass])();
} while (rectyp != END_RECORD);
numRecord = 0;
fname_obj = 0;
}
/**************************************************************************
33 sub-10a3h ok++ (PMO)
**************************************************************************/
void skipRecData() {
readRecData(recbuf);
}
/**************************************************************************
34 is_library sub_10ach ok++ (PMO)
**************************************************************************/
char is_library(char *p1) {
return (p1 = strrchr(p1, '.')) && (strcmp(p1, ".lib") == 0 || strcmp(p1, ".LIB") == 0);
}
#ifdef CPM
/* Original non stdarg functions */
/**************************************************************************
35 err_message sub_10fdh ok++ (PMO)
**************************************************************************/
void err_message(p1, p2, p3, p4, p5) char *p1;
{
fflush(stdout);
if (libraryName)
fprintf(stderr, "%s: ", libraryName);
if (fname_obj)
fprintf(stderr, "%s: ", fname_obj);
if (numRecord != 0)
fprintf(stderr, "%d: ", numRecord);
fprintf(stderr, p1, p2, p3, p4, p5);
fputc('\n', stderr);
}
/**************************************************************************
36 fatal_err sub_1187h ok++ (PMO)
**************************************************************************/
void fatal_err(p1, p2, p3, p4, p5) {
err_message(p1, p2, p3, p4, p5);
exit(1);
}
/**************************************************************************
37 simpl_err sub_11bfh ok++ (PMO)
**************************************************************************/
void simpl_err(p1, p2, p3, p4, p5) {
err_message(p1, p2, p3, p4, p5);
++err_num;
}
/**************************************************************************
38 warning sub_11f2h ok++ (PMO)
**************************************************************************/
void warning(p1, p2, p3, p4, p5) char *p1;
{
fprintf(stderr, p1, p2, p3, p4, p5);
fprintf(stderr, " (warning)\n");
}
/**************************************************************************
39 badFormat sub_1232h ok++ (PMO)
**************************************************************************/
void badFormat(p1, p2, p3, p4, p5) {
err_message("bad object code format");
fatal_err(p1, p2, p3, p4, p5);
}
#else
/**************************************************************************
Shared err_message using va_list
**************************************************************************/
static void verrMsg(char const *fmt, va_list args) {
fflush(stdout);
if (libraryName)
fprintf(stderr, "%s: ", libraryName);
if (fname_obj)
fprintf(stderr, "%s: ", fname_obj);
if (numRecord != 0)
fprintf(stderr, "%d: ", numRecord);
vfprintf(stderr, fmt, args);
fputc('\n', stderr);
}
void err_message(char const *fmt, ...) {
va_list args;
va_start(args, fmt);
verrMsg(fmt, args);
va_end(args);
}
/**************************************************************************
36 fatal_err sub_1187h ok++ (PMO)
**************************************************************************/
_Noreturn void fatal_err(char const *fmt, ...) {
va_list args;
va_start(args, fmt);
verrMsg(fmt, args);
va_end(args);
exit(1);
}
/**************************************************************************
37 simpl_err sub_11bfh ok++ (PMO)
**************************************************************************/
void simpl_err(char const *fmt, ...) {
va_list args;
va_start(args, fmt);
verrMsg(fmt, args);
va_end(args);
++err_num;
}
/**************************************************************************
38 warning sub_11f2h ok++ (PMO)
**************************************************************************/
void warning(char const *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
fprintf(stderr, " (warning)\n");
va_end(args);
}
/**************************************************************************
39 badFormat sub_1232h ok++ (PMO)
**************************************************************************/
void badFormat(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
err_message("bad object code format");
verrMsg(fmt, args);
va_end(args);
exit(1);
}
#endif
/**************************************************************************
40 xalloc sub_1265h ok++
**************************************************************************/
void *xalloc(size_t p1) {
register char *st;
if ((st = malloc(p1)) == 0)
fatal_err("Cannot get memory");
clrbuf(st, p1);
return st;
}
/**************************************************************************
41 clrbuf ok++ (PMO) (use macro for newer code)
as latest definition of memcpy uses restrict and gcc complains of overlap
also memset is usually inlined
**************************************************************************/
#ifdef CPM
void clrbuf(register char *st, size_t p2) {
if (p2 == 0)
return;
*st = 0;
if (--p2 == 0)
return;
bmove(st, st + 1, p2); /* use bmove to copy 0 to remaining locations*/
}
#endif
/*
* Relocation type
*/
#define RelocType(n) ((n)&0xf0)
#define RelocSize(n) ((n)&0xf)
#define RELOCBASEMASK 0x30
#define RABS 0x00 /* Absolute - no relocation (i.e. no change) */
#define RPSECT 0x10 /* Relocation within named psect */
#define RNAME 0x20 /* Relocation by value of name */
#define RR 0x40 /* psect relative */
#define RRPSECT (RR | RPSECT) /* Relocation within psect, less the current pc */
#define RRNAME (RR | RNAME) /* As for RRPSECT, but relative to a symbol rather than a psect */
#define RS 0x80 /* Segment relative */
#define RSPSECT (RS | RPSECT) /* Relocation by the segment value for the psect */
#define RSNAME (RS | RNAME) /* Relocation by the segment value for the symbol */
/**************************************************************************
42 sub_12d2 relocRecPass1 ok++ (PMO)
**************************************************************************/
void relocRecPass1() {
char *name; /* Psect or external name */
register uint8_t *s;
readRecData(recbuf); /* Read RELOC record to recbuf */
for (s = recbuf; s < recbuf + length; s += strlen(name) + RELOC_NAME + 1) {
name = (char *)s + RELOC_NAME;
if (RelocType(s[RELOC_TYPE]) == RNAME || RelocType(s[RELOC_TYPE]) == RRNAME)
addSym(name, SF_GLOBAL);
}
}
/**************************************************************************
43 relocRecPass2 ok++ (PMO)
*
* 3 minor differences as chkAddRecordItem 1st param is uint8_t and compiler
* doesn't load high byte
* 1 instance of benign code differences
* original ex de,hl | ld (ix-4),e | ld (ix-3),d | ld hl,8
* new ld (ix-4),l | ld (ix-3),h | ex de,hl | ld hl,8
**************************************************************************/
void relocRecPass2() {
uint8_t *rp; /* Pointer relocation information field */
sym_t *ps = NULL; /* PMO Force init */
char *name; /* Psect or external name */
size_t len; /* Length relocation information field */
uint16_t offset;
uint32_t relocatability;
uint8_t reloc_type; /* Relocation type */
register psect_t *pp;
readRecData(recbuf); /* Read RELOC record to recbuf */
for (rp = recbuf; rp < (recbuf + length);
rp += strlen((char *)rp + RELOC_NAME) + RELOC_NAME + 1) {
name = (char *)rp + RELOC_NAME;
fixupName = name;
offset = (uint16_t)conv_letoi16(rp);
if (offset >= textLen)
badFormat("relocation offset %d out of range 0..%d-%d-1", offset, textLen,
textRecPtr - textRecBuf);
reloc_type = rp[RELOC_TYPE];
if (key_R) {
if ((reloc_type & RELOCBASEMASK) == RNAME) {
ps = addSym(name, 0);
if (LowFlags(ps->flags) != SF_EXTERN) {
/* convert to PSECT relative */
reloc_type = (reloc_type & ~RELOCBASEMASK) | RPSECT;
fixupName = name = ps->psectSym->name;
/* calc length of psect reloc record */
len = RELOC_NAME + strlen(name) + 1;
chkAddRecordItem(RELOC_RECORD, len);
/* Adjust offset for data already written from this block
* and convert delta account for the psect start. This is
* written to the reloc file for final fixup
* the adjustment for to account for psect relative is done
* below
*/
fixup(offset - alreadyWritten, reloc_type,
ps->p.value - addSym(name, SF_PSECT)->p.pinfo->blkStartAddress);
}
}
len = RELOC_NAME + strlen(name) + 1;
chkAddRecordItem(RELOC_RECORD, len);
offset -= alreadyWritten; /* Ajust for already written text */
conv_u16tob(offset, nonTextRecPtr); /* Save offset in record */
nonTextRecPtr[RELOC_TYPE] = reloc_type;
strcpy((char *)nonTextRecPtr + RELOC_NAME, name);
nonTextRecPtr += len;
switch (RelocType(reloc_type)) { /* type */
default:
badFormat("illegal relocation type: %02x", reloc_type);
break;
case RABS:
case RNAME:
case RRNAME:
case RS:
case RSPSECT:
case RSNAME:
fixup(offset, reloc_type, 0); /* Doesn't change but updates end marker */
break;
case RPSECT:
case RR:
case RRPSECT:
fixup(offset, reloc_type, addSym(name, SF_PSECT)->p.pinfo->blkStartAddress);
break;
}
} else {
if (key_L || key_LM)
chkAddRecordItem(RELOC_RECORD, RELOC_NAME + 1); /* Item with name set to "" */
offset -= alreadyWritten;
switch (RelocType(reloc_type)) {
default:
badFormat("illegal relocation type: %02x", reloc_type);
break;
case RABS:
case RS:
ps = 0; /* no name */
fixup(offset, reloc_type, 0);
break;
case RR:
case RRPSECT:
pp = (ps = addSym(name, SF_PSECT))->p.pinfo;
fixup(offset, reloc_type,
0 - textBaseAddress - (uint32_t)offset + pp->linkAddress +
pp->blkStartAddress);
break;
case RPSECT:
pp = (ps = addSym(name, SF_PSECT))->p.pinfo;
fixup(offset, reloc_type, pp->linkAddress + pp->blkStartAddress);
break;
case RSPSECT:
pp = (ps = addSym(name, SF_PSECT))->p.pinfo;
relocatability = pp->align;
if (relocatability == 0)
relocatability = 1;
if (ps->flags & SF_BIGSEG)
relocatability <<= 16;
fixup(offset, reloc_type, (pp->loadAddress - pp->linkAddress) / relocatability);
break;
case RRNAME:
fixup(offset, reloc_type,
0 - textBaseAddress - (uint32_t)offset +
(ps = addSym(name, 0))->p.value); /* m22: */
ps = ps->psectSym;
break;
case RNAME:
ps = addSym(name, 0);
fixup(offset, reloc_type, ps->p.value);
ps = ps->psectSym;
break;
case RSNAME:
pp = (ps = addSym(name, 0)->psectSym)->p.pinfo; /* m25: */
relocatability = pp->align;
if (relocatability == 0)
relocatability = 1;
if (ps->flags & SF_BIGSEG)
relocatability <<= 0x10;
fixup(offset, reloc_type, (pp->loadAddress - pp->linkAddress) / relocatability);
break;
}
if ((key_L && !(reloc_type & RS)) || (key_LM && (reloc_type & RS)))
if (ps && !(ps->flags & SF_ABS)) {
conv_u16tob(offset, nonTextRecPtr); /* reloc item offset */
nonTextRecPtr[RELOC_TYPE] = reloc_type & (SF_ABS | SF_LOWMASK);
strcpy((char *)nonTextRecPtr + RELOC_NAME, ps->name);
nonTextRecPtr += (strlen(ps->name) + RELOC_NAME + 1);
}
}
} /* m29: */
}
/**************************************************************************
44 fixup ok++ (PMO)
*
* code same except that the BB block after the switch is moved to earlier
* in the code image
**************************************************************************/
void fixup(int offset, uint16_t relocType, uint32_t delta) {
uint32_t nval;
uint32_t nmask;
uint8_t *fixloc;
fixloc = offset + curAddr;
endAddr = fixloc + RelocSize(relocType);
switch (RelocSize(relocType)) {
case 1:
nval = delta + *fixloc;
nmask = 0xff;
*fixloc += (uint8_t)delta;
break;
case 2:
nval = delta + (long)conv_letoi16(fixloc);
nmask = 0xffff;
conv_u16tob((uint8_t)nval, fixloc);
break;
case 3:
nval = delta + conv_btou24(fixloc);
conv_u24tob(nval, fixloc);
nmask = 0xffffff;
break;
case 4:
conv_u32tob(delta + conv_btou32(fixloc), fixloc);
return;
default:
badFormat("illegal relocation size: %02x", relocType);
return;
}
if ((~nmask & nval) == 0 || (nval | nmask) == -1L) /* Check overflow */
return;
simpl_err("Fixup overflow referencing %s %s", (relocType & RNAME) ? "symbol" : "psect",
fixupName);
}
/**************************************************************************
45 create_symtab sub-1af4h ok++ (PMO)
**************************************************************************/
void create_symtab() {
symbol_table = (sym_t **)xalloc(SIZE_SYMTAB);
}
/**************************************************************************
46 getSymbolSlot ok++ (PMO)
**************************************************************************/
sym_t **getSymbolSlot(char *symbol_name, int flags) {
sym_t **startp;
sym_t **testp;
uint16_t hashval;
uint8_t *puc;
register sym_t *ps;
for (hashval = 0, puc = (uint8_t *)symbol_name; *puc != 0; puc++)
hashval += *puc;
startp = symbol_table + (hashval % MAX_SYMBOLS);
flags &= 0xC000;
testp = startp;
while (ps = *testp) {
if ((ps->flags & 0xC000) == flags) {
if ((ps->flags & SF_GLOBAL) || ps->fileId == curFileId || key_R)
if (strcmp(ps->name, symbol_name) == 0)
break;
}
if (++testp == &symbol_table[MAX_SYMBOLS])
testp = symbol_table;
if (testp == startp)
fatal_err("Too many symbols");
}
return testp;
}
/**************************************************************************
47 getSymbol ok++ (PMO)
**************************************************************************/
sym_t *getSymbol(char *symbol_name, int flags) {
return *getSymbolSlot(symbol_name, flags);
}
/**************************************************************************
48 addSym ok++ (PMO)
**************************************************************************/
sym_t *addSym(char *symbol_name, int flags) {
sym_t **slot;
register sym_t *ps;
slot = getSymbolSlot(symbol_name, flags);
ps = *slot;
if (ps == 0) {
++newSymCnt;
*slot = ps = xalloc(sizeof(sym_t));
ps->name = xalloc(strlen(symbol_name) + 1);
strcpy(ps->name, symbol_name);
ps->fileId = (uint8_t)curFileId;
if ((flags & 0xC000) == 0) {
++cntUnresolved;
ps->flags = SF_EXTERN;
} else {
if (nextPsect == psectInfo + MAX_PSECTS)
fatal_err("Too many psects");
nextPsect->psectSym = ps; /* m2: */
ps->p.pinfo = nextPsect++;
}
}
ps->flags |= (flags & 0xFFF0);
return ps;
}
/**************************************************************************
49 prSymbol ok++ (PMO)
**************************************************************************/
void prSymbol(char *symbol_name, uint32_t value, int lflag, register sym_t *psectSym) {
if (!key_H) {
if (lflag != 0)
return;
fprintf(symFp, "%4.4" PRIx32 " %s\n", value, symbol_name);
return;
}
switch (lflag) {
case SF_REGNAM:
fprintf(symFp, "%s reg %" PRIx32 "\n", symbol_name, value);
return;
case SF_FILNAM:
fprintf(symFp, "%s\n", symbol_name);
return;
case SF_STACK:
fprintf(symFp, "%s stk %" PRId32 "\n", symbol_name, value);
return;
}
fprintf(symFp, "%s %" PRIx32 , symbol_name, value);
if (psectSym != 0)
fprintf(symFp, " %" PRIx32, psectSym->p.pinfo->loadAddress - psectSym->p.pinfo->linkAddress);
fputc('\n', symFp);
return;
}
/**************************************************************************
50 symRecPass2 ok++ (PMO)
*
* minor optimisation on type parameter for chkAddRecordItem
**************************************************************************/
void symRecPass2() {
uint32_t value;
uint8_t *ptr_sym; /* ptr to sym record */
char *psect_name; /* psectSym name */
char *symbol_name; /* symbol name */
sym_t *psectSym; /* ptr to psect symbol */
uint16_t flag; /* flags */
uint16_t lflag; /* low flags */
size_t len; /* sub record length */
readRecData(recbuf); /* Read SYM record to recbuf */
for (ptr_sym = recbuf; recbuf + length > ptr_sym; ptr_sym += len) {
flag = (uint16_t)conv_letoi16(ptr_sym + 4);
lflag = LowFlags(flag);
symbol_name = (psect_name = (char *)ptr_sym + SYM_PNAME);
while (*symbol_name++) /* Skip psectSym name */
;
len = SYM_PNAME + strlen(psect_name) + 1 + strlen(symbol_name) + 1;
psectSym = *psect_name ? addSym(psect_name, SF_PSECT) : (sym_t *)0;
value = conv_btou32(ptr_sym);
switch (lflag) {
case SF_NULL:
if (flag & SF_GLOBAL)
break;
case SF_LINENO:
if (psectSym != 0) {
if (!(psectSym->flags & SF_OVRLD))
value += psectSym->p.pinfo->blkStartAddress;
if (!key_R)
value += psectSym->p.pinfo->linkAddress;
}
conv_u32tob(value, (uint8_t *)ptr_sym); /* m9: */
case SF_STACK:
case SF_REGNAM:
case SF_FILNAM:
if (key_X || (key_Z && isLocalName(symbol_name)))
break;
if (fname_sym)
prSymbol(symbol_name, value, lflag, psectSym);
if (!key_C) {
chkAddRecordItem(SYM_RECORD, len);
bmove(ptr_sym, nonTextRecPtr, len);
nonTextRecPtr += len;
}
break;
case SF_COMM:
case SF_EXTERN:
break;
}
}
}
/**************************************************************************
51 symRecPass1 ok++ (PMO)
**************************************************************************/
void symRecPass1() {
uint32_t value;
uint8_t *ptr_sym; /* ptr to sym record */
char *psect_name; /* psect name */
char *symbol_name; /* symbol name */
sym_t *psectSym; /* ptr to symbol table */
uint16_t flags; /* flags */
uint16_t lflags; /* low flags */
size_t symdefLen; /* length of symbol def */
readRecData(recbuf); /* Read SYM record to recbuf */
for (ptr_sym = recbuf; ptr_sym < recbuf + length; ptr_sym += symdefLen) {
flags = (uint16_t)conv_letoi16(ptr_sym + SYM_FLAGS);
lflags = flags & 0xF;
symbol_name = psect_name = (char *)ptr_sym + SYM_PNAME;
while (*symbol_name++ != 0) /* Skip psectSym name */
;
symdefLen = SYM_PNAME + strlen(psect_name) + 1 + strlen(symbol_name) + 1;
psectSym = lflags == SF_NULL ? addSym(psect_name, SF_PSECT) : (sym_t *)0;
value = conv_btou32(ptr_sym + SYM_VALUE);
switch (lflags) {
case SF_EXTERN:
addSym(symbol_name, flags | SF_GLOBAL); /* Will add if not already present */
break;
case SF_NULL:
if (!(flags & SF_GLOBAL)) /* Skip local define names */
break;
case SF_COMM:
defineSym(symbol_name, psectSym, value, flags);
break;
case SF_STACK:
case SF_REGNAM:
case SF_LINENO:
case SF_FILNAM:
if (flags & SF_GLOBAL)
simpl_err("symbol %s cannot be global", symbol_name);
break;
}
}
}
/**************************************************************************
52 defineSym ok++
**************************************************************************/
void defineSym(char *symbol_name, sym_t *psectSym, uint32_t value, int flags) {
uint8_t slflag, lflag;
register sym_t *ps;
ps = addSym(symbol_name, flags);
ps->flags |= flags & 0xFFF0; /* Merge high flags */
slflag = ps->flags & 0xF; /* Current symbol low flags*/
lflag = flags & 0xF;
if (slflag == SF_COMM) {
if (lflag != SF_COMM)
simpl_err("common symbol conflict: %s", symbol_name);
else if (ps->p.value < value)
ps->p.value = value;
} else if (slflag == SF_EXTERN) {
--cntUnresolved; /* symbol now resolved */
ps->p.value = value;
ps->psectSym = psectSym;
if (lflag != SF_COMM && !(psectSym->flags & SF_OVRLD))
ps->p.value += psectSym->p.pinfo->blkStartAddress;
ps->flags = (ps->flags & 0xFFF0) | lflag; /* Update low flags */
} else
simpl_err("multiply defined symbol: %s", symbol_name);
}
/**************************************************************************
53 defineIfNeeded ok++ (PMO)
**************************************************************************/
void defineIfNeeded(char *symbol_name, sym_t *psectSym, uint32_t value, int flags) {
register sym_t *ps;
if ((ps = getSymbol(symbol_name, flags)) && LowFlags(ps->flags) != SF_EXTERN)
return;
defineSym(symbol_name, absSym, value, flags);
addSym(symbol_name, flags)->psectSym = psectSym;
}
/**************************************************************************
54 psectRecPass1 ok++ (PMO)
*
* optimiser changes ld a,h | or 80h | ld h,a with set 7,h
**************************************************************************/
void psectRecPass1() {
uint16_t psect_flag;
register sym_t *ps;
readRecData(recbuf); /* Read PSECT record to recbuf */
psect_flag = (uint16_t)conv_letoi16(recbuf + PSECT_FLAGS) | SF_PSECT;
ps = addSym((char *)recbuf + PSECT_PNAME, psect_flag);
if ((ps->flags & SF_GLOBAL) && !(psect_flag & SF_GLOBAL))
simpl_err("local psect '%s' conflicts with global psect of same name", ps->name);
}
/**************************************************************************
55 xpsectRecPass1 ok++
**************************************************************************/
void xpsectRecPass1() {
sym_t *classSym;
char *className;
uint32_t max_size;
uint16_t relocatability;
register sym_t *ps;
readRecData(recbuf); /* Read XPSECT record to recbuf */
ps = addSym((char *)recbuf + XPSECT_PNAME, SF_PSECT);
/* Force className to be set before adding to it */
className = (char *)recbuf + XPSECT_PNAME;
className += strlen(className) + 1;
if (className - (char *)recbuf < length) {
classSym = addSym(className, SF_CLASS | SF_GLOBAL);
if (ps->p.pinfo->classSym == 0)
ps->p.pinfo->classSym = classSym;
else {
if (classSym != ps->p.pinfo->classSym)
simpl_err("psect %s cannot be in classes %s and %s", ps->name, classSym->name,
ps->p.pinfo->classSym->name);
}
}
max_size = conv_btou32(recbuf + XPSECT_MAX);
relocatability = conv_letoi16(recbuf + XPSECT_RELOC);
if (max_size != 0) {