Leaked source code of windows server 2003
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1193 lines
47 KiB

/* SCCSID = %W% %E% */
/*
* Copyright Microsoft Corporation, 1983-1987
*
* This Module contains Proprietary Information of Microsoft
* Corporation and should be treated as Confidential.
*/
/****************************************************************
* *
* NEWTP2.C *
* *
* This module contains functions to process object modules on *
* pass 2. *
* *
****************************************************************/
#include <minlit.h> /* Types, constants, macros */
#include <bndtrn.h> /* Types and constants */
#include <bndrel.h> /* More types and constants */
#include <lnkio.h> /* Linker I/O definitions */
#include <newexe.h> /* DOS & 286 .EXE structure definitions */
#if EXE386
#include <exe386.h> /* 386 .EXE structure definitions */
#endif
#include <lnkmsg.h> /* Error messages */
#if OXOUT OR OIAPX286
#include <xenfmt.h> /* Xenix format definitions */
#endif
#include <extern.h> /* External declarations */
#if OSEGEXE
extern RLCPTR rlcLidata; /* Pointer to LIDATA fixup array */
extern RLCPTR rlcCurLidata; /* Pointer to current LIDATA fixup */
#endif
/*
* LOCAL FUNCTION PROTOTYPES
*/
LOCAL void NEAR DataRec(void);
BYTE * ObExpandIteratedData(unsigned char *pb,
unsigned short cBlocks, WORD *pSize);
LOCAL void NEAR DataBlockToVM(void);
LOCAL void NEAR SegRec2(void);
LOCAL void NEAR GrpRec2(void);
LOCAL void NEAR ExtRec2(void);
LOCAL void NEAR ComDef2(void);
#if ALIGN_REC
#else
/*
* GetBytesNoLim : just like GetBytes but no fixed limit
*/
void NEAR GetBytesNoLim(pb,n)
BYTE *pb; /* Pointer to buffer */
WORD n; /* Number of bytes to read in */
{
FILE *f = bsInput;
if (n <= f->_cnt)
{
memcpy(pb,f->_ptr, n);
f->_cnt -= n;
f->_ptr += n;
}
else
fread(pb,1,n,bsInput); /* Ask for n bytes */
// ChkInput();
cbRec -= n; /* Update byte count */
}
#endif
/****************************************************************
* *
* DataRec: *
* *
* This function takes no arguments. It processes a LEDATA *
* record or an LIDATA record. It does not return a *
* meaningful value. See "8086 Object Formats EPS." *
* *
****************************************************************/
LOCAL void NEAR DataRec(void) /* Process a data record */
{
SNTYPE sn; /* SEGDEF number */
RATYPE ra; /* Segment offset */
SNTYPE gsn; /* Global SEGDEF number */
fSkipFixups = FALSE; // Make sure that we don't skip fixups
sn = GetIndex((WORD)1,(WORD)(snMac - 1)); /* Get segment number */
#if OMF386
if(rect & 1) ra = LGets();
else
#endif
ra = WGets(); /* Get relative address */
vcbData = cbRec - 1; /* Get no. of data bytes in rec */
if(vcbData > DATAMAX) Fatal(ER_datarec);
/* Check if record too large */
#if NOT RGMI_IN_PLACE
GetBytesNoLim(rgmi,vcbData); /* Fill the buffer */
#endif
gsn = mpsngsn[sn]; /* Map SEGDEF no. to global SEGDEF */
vgsnCur = gsn; /* Set global */
fDebSeg = (fSymdeb) ? (FTYPE) ((0x8000 & gsn) != 0) : fSymdeb;
/* If debug option on check for debug segs*/
if (fDebSeg)
{ /* If debug segment */
vraCur = ra; /* Set current relative address */
vsegCur = vgsnCur = 0x7fff & gsn; /* Set current segment */
}
else
{
/* If not a valid segment, don't process datarec */
#if SYMDEB
if(gsn == 0xffff || !gsn || mpgsnseg[gsn] > segLast)
#else
if(!gsn || mpgsnseg[gsn] > segLast)
#endif
{
vsegCur = SEGNIL;
vrectData = RECTNIL;
#if RGMI_IN_PLACE
SkipBytes(vcbData); /* must skip bytes for this record...*/
#endif
fSkipFixups = TRUE; /* plus skip any associated fixups */
return; /* Good-bye! */
}
vraCur = ra + mpgsndra[gsn]; /* Set current relative address */
vsegCur = mpgsnseg[gsn]; /* Set current segment */
}
vrectData = rect; /* Set the record type */
#if RGMI_IN_PLACE
if(TYPEOF(rect) == LIDATA) /* If LIDATA record */
{
rgmi = bufg; /* use general purpose buffer for read*/
}
else
{
rgmi = PchSegAddress(vcbData,vsegCur,vraCur);
/* read data in place... */
}
GetBytesNoLim(rgmi,vcbData); /* Fill the buffer */
#endif
if(TYPEOF(vrectData) == LIDATA) /* If LIDATA record */
{
#if OSEGEXE
if(fNewExe)
{
if (vcbData >= DATAMAX)
Fatal(ER_lidata);
rlcLidata = (RLCPTR ) &rgmi[(vcbData + 1) & ~1];
/* Set base of fixup array */
rlcCurLidata = rlcLidata; /* Initialize pointer */
return;
}
#endif
#if ODOS3EXE OR OIAPX286
if(vcbData > (DATAMAX / 2))
{
OutError(ER_lidata);
memset(&rgmi[vcbData],0,DATAMAX - vcbData);
}
else
memset(&rgmi[vcbData],0,vcbData);
ompimisegDstIdata = (char *) rgmi + vcbData;
#endif
}
}
/****************************************************************
* *
* SegRec2: *
* *
* This function processes SEGDEF records on pass 2. *
* See pp. 32-35 in "8086 Object Module Formats EPS." *
* *
****************************************************************/
LOCAL void NEAR SegRec2(void)
{
WORD tysn; /* ACBP field */
WORD align; /* Alignment subfield of ACBP */
SATYPE saAbs; /* Frame number of absolute LSEG */
LNAMETYPE lname; /* Segment name index */
WORD comb; /* Segment combining information */
APROPSNPTR apropSn; /* Pointer to segment hash tab entry */
SNTYPE gsn; /* Global SEGDEF no. */
RATYPE dra;
RBTYPE rhteClass; /* Segment class name rhte */
WORD DebKind; /* Debug seg kind; 1-$$TYPES; 2-$$SYMBOLS */
DWORD gsnLen; /* Segment length */
#if ILINK
WORD cbPad; /* size of padding used */
#endif
ASSERT(snMac < SNMAX); /* No overflow on Pass 2 */
tysn = Gets(); /* Read in ACBP byte */
align = (tysn >> 5) & 7; /* Get alignment subfield */
ASSERT(align != 5); /* Unnamed absolute not supported */
ASSERT(align != 6); /* LTL LSEG not supported */
if(align == ALGNABS) /* If absolute LSEG */
{
saAbs = WGets(); /* Read in frame number */
Gets(); /* Skip frame offset */
}
#if OMF386
if(rect & 1)
gsnLen = LGets();
else
#endif
gsnLen = (long) WGets(); /* Read in segment length */
/* Don't need to check for 386 record, done in pass 1: */
if(tysn & BIGBIT) gsnLen = LXIVK; /* Length 64K if big bit set */
lname = GetIndex((WORD)1,(WORD)(lnameMac - 1)); /* Get segment name index */
rhteClass = mplnamerhte[GetIndex((WORD)1,(WORD)(lnameMac - 1))];
/* Get segment class name rhte */
#if SYMDEB
if (DebKind = IsDebSeg(rhteClass, mplnamerhte[lname]))
{ /* If MS debug segment then mark it */
if (!fSymdeb)
mpsngsn[snMac++] = 0xffff;
else
mpsngsn[snMac++] = ((DebKind == 1) ?
segDebFirst + segDebLast :
segDebFirst + segDebLast + ObjDebTotal
) | 0x8000; /* Set debug global number */
SkipBytes((WORD)(cbRec - 1));
return;
}
#endif
GetIndex((WORD)0,(WORD)(lnameMac - 1)); /* Skip overlay name index */
switch(align) /* Switch on alignment type */
{
case ALGNABS: /* Absolute LSEG */
case ALGNWRD: /* Word-aligned LSEG */
case ALGNBYT: /* Byte-aligned LSEG */
case ALGNPAR: /* Paragraph-aligned LSEG */
case ALGNPAG: /* Page-aligned LSEG */
#if OMF386
case ALGNDBL: /* Double-aligned LSEG */
#endif
break;
default: /* Unsupported or illegal types */
mpsngsn[snMac++] = 0; /* Map to nothing */
return; /* And return */
}
++snkey; /* Increment segment i.d. key */
if(comb = (tysn >> 2) & 7) /* If not a private segment */
{
apropSn = (APROPSNPTR )
PropRhteLookup(mplnamerhte[lname],ATTRPSN,FALSE);
/* Look up property cell */
ASSERT(apropSn != PROPNIL); /* Should always be true */
while(apropSn->as_attr != ATTRNIL)
{ /* Look for matching class */
if(apropSn->as_attr == ATTRPSN &&
apropSn->as_rCla == rhteClass) break;
/* Break if a match is found */
apropSn = (APROPSNPTR ) FetchSym(apropSn->as_next,FALSE);
/* Try next link in list */
}
ASSERT(apropSn->as_attr == ATTRPSN);
}
else /* Else if private segment */
{
apropSn = (APROPSNPTR )
PropRhteLookup(mplnamerhte[lname],ATTRLSN,FALSE);
/* Look up property cell */
ASSERT(apropSn != PROPNIL); /* Should always be true */
while(apropSn->as_attr != ATTRNIL)
{ /* Search for match */
if(apropSn->as_attr == ATTRLSN && apropSn->as_key == snkey) break;
/* Break when match found */
apropSn = (APROPSNPTR ) FetchSym(apropSn->as_next,FALSE);
/* Try next link in list */
}
ASSERT(apropSn->as_attr == ATTRLSN);
}
gsn = apropSn->as_gsn; /* Get global SEGDEF no. */
#if ILINK
if (fIncremental && !fLibraryFile && !(apropSn->as_fExtra & NOPAD) &&
gsnLen && gsnLen != LXIVK)
/* Add code/data padding to non-library segments if it doesn't
* overflow.
*/
gsnLen += (cbPad = ((apropSn->as_flags & NSTYPE) == NSCODE) ?
cbPadCode : cbPadData);
else
cbPad = 0; /* no padding please */
#endif
if(comb == COMBSTK) mpgsndra[gsn] =
mpsegraFirst[mpgsnseg[gsn]] + apropSn->as_cbMx - gsnLen;
else
{
/* If combine-type public, start at end of combined segment. */
if(comb != COMBCOM)
dra = mpgsndra[gsn] + apropSn->as_cbPv;
/*
* Else if common, start at beginning of segment. Save current
* combined size, except this portion, in as_cbPv. If this
* portion is bigger as_cbPv is reset below.
*/
else
{
dra = mpsegraFirst[mpgsnseg[gsn]];
apropSn->as_cbPv += mpgsndra[gsn] - dra;
}
switch(align) /* Switch on alignment type */
{
case ALGNWRD: /* Word-aligned LSEG */
mpgsndra[gsn] = (~0L<<1) & (dra + (1<<1) - 1);
/* Round to next word offset */
break;
#if OMF386
case ALGNDBL: /* Double-aligned LSEG */
mpgsndra[gsn] = (~0L<<2) & (dra + (1<<2) - 1);
/* Round to next double offset */
break;
#endif
case ALGNPAR: /* Paragraph-aligned LSEG */
mpgsndra[gsn] = (~0L<<4) & (dra + (1<<4) - 1);
/* Round to next paragraph offset */
break;
case ALGNPAG: /* Page-aligned LSEG */
mpgsndra[gsn] = (~0L<<8) & (dra + (1<<8) - 1);
/* Round to next page offset */
break;
default: /* All others */
mpgsndra[gsn] = dra; /* Use byte offset */
break;
}
}
/*
* If public, as_cbPv is size of this public portion; if common,
* as_cbPv is the larger of total combined publics and this
* common portion. Skip empty SEGDEFs.
*/
if (/*gsnLen != 0L && */(comb != COMBCOM || gsnLen > apropSn->as_cbPv))
apropSn->as_cbPv = gsnLen;
mpsngsn[snMac++] = gsn; /* Map SEGDEF no. to gsn */
if(align == ALGNABS) mpsegsa[mpgsnseg[gsn]] = saAbs;
/* Map seg base to frame number */
MARKVP(); /* Mark page as changed */
#if ILINK
if (fIncremental)
{
AddContribution(gsn,
(WORD) (mpgsndra[gsn] - mpsegraFirst[mpgsnseg[gsn]]),
(WORD) (mpgsndra[gsn] - mpsegraFirst[mpgsnseg[gsn]] + gsnLen),
cbPad);
gsnLen -= cbPad; /* Don't include padding for CV */
}
#endif
#if SYMDEB
if(fSymdeb && gsnLen && IsCodeFlg(apropSn->as_flags))
SaveCode(gsn, gsnLen, (DWORD) -1L);
#endif
}
/****************************************************************
* *
* GrpRec2: *
* *
* This function processes GRPDEF records on pass 2. *
* See pp. 36-39 in "8086 Object Module Formats EPS." *
* *
****************************************************************/
LOCAL void NEAR GrpRec2(void)
{
LNAMETYPE lnameGroup; /* Group name index */
APROPGROUPPTR apropGroup; /* Pointer to property cell */
lnameGroup = GetIndex((WORD)1,(WORD)(lnameMac - 1));
/* Read in group name index */
apropGroup = (APROPGROUPPTR )
PropRhteLookup(mplnamerhte[lnameGroup],ATTRGRP,FALSE);
/* Look up entry in hash table */
ASSERT(grMac < GRMAX); /* Should have been caught on pass 1 */
mpgrggr[grMac++] = apropGroup->ag_ggr;
/* Map GRPDEF to global GRPDEF */
SkipBytes((WORD)(cbRec - 1)); /* Skip to checksum byte */
}
/*
* AddVmProp : Add a symbol-table property address to a list
*
* Returns: pointer to the new list element; the pointer is
* a word offset from the start of the list area in VM
*/
PLTYPE FAR * NEAR AddVmProp (PLTYPE FAR *list, RBTYPE rprop)
{
PLTYPE FAR *new;
new = (PLTYPE FAR *) GetMem(sizeof(PLTYPE));
// Add unresolved external at the list head
new->pl_next = list;
new->pl_rprop = rprop;
return(new);
}
/****************************************************************
* *
* ExtRec2: *
* *
* This function processes EXTDEF records on pass 2. Note *
* that in pass 2, any undefined externals are errors. *
* See pp. 47-48 in "8086 Object Module Formats EPS." *
* *
****************************************************************/
LOCAL void NEAR ExtRec2(void)
{
SBTYPE sb; /* External symbol name */
APROPNAMEPTR apropName; /* Property cell pointer */
APROPUNDEFPTR apropUndef; /* Property cell pointer */
APROPALIASPTR apropAlias; /* Property cell pointer */
RBTYPE rhte; /* Virt. addr. of hash table entry */
#if OSEGEXE
APROPEXPPTR apropExp; /* Export cell pointer */
#endif
while (cbRec > 1) /* While not at end of record */
{
ASSERT(extMac < EXTMAX); /* Should be checked on Pass 1 */
if (TYPEOF(rect) == CEXTDEF)
{
/* Look for symbol among PUBDEFs */
rhte = mplnamerhte[GetIndex(1, (WORD)(lnameMac - 1))];
apropName = (APROPNAMEPTR) PropRhteLookup(rhte, ATTRPNM, FALSE);
}
else
{
sb[0] = (BYTE) Gets(); /* Read in symbol length */
if(TYPEOF(rect) == EXTDEF)
GetBytes(&sb[1], B2W(sb[0]));
/* Read in the text of the symbol */
else
GetLocName(sb); /* Transform local name */
#if CMDXENIX
if (symlen && B2W(sb[0]) > symlen)
sb[0] = symlen; /* Truncate if necessary */
#endif
/* Look for symbol among PUBDEFs */
apropName = (APROPNAMEPTR) PropSymLookup(sb, ATTRPNM, FALSE);
rhte = vrhte;
}
GetIndex(0, 0x7FFF); /* Skip the type index */
apropUndef = PROPNIL;
if (apropName == PROPNIL)
{
/* Look for symbol among ALIASES */
apropAlias = (APROPALIASPTR) PropRhteLookup(rhte, ATTRALIAS, FALSE);
if (apropAlias != PROPNIL)
{
// Every call to PropRhteLookup as a side effect sets
// the global variable 'vrprop' pointing to the
// just retrieved proprety cell from symbol table.
// Because for substitute symbols we don't call
// PropRhteLookup instead we use direct pointer from
// alias property cell, then we have to reset the
// 'vrprop' here.
vrprop = apropAlias->al_sym;
apropName = (APROPNAMEPTR) FetchSym(apropAlias->al_sym, FALSE);
if (apropName->an_attr == ATTRUND)
{
apropUndef = (APROPUNDEFPTR) apropName;
apropName = PROPNIL;
}
}
#if OSEGEXE
/* If public definition not found and this is segmented DLL,
* handle the possibility that this is a self-imported alias.
*/
if (apropName == PROPNIL && fNewExe && (vFlags & NENOTP))
{
/* Look up exported name. */
apropExp = (APROPEXPPTR) PropRhteLookup(rhte, ATTREXP, FALSE);
/* If found, get the symbol definition which might be different
* from the export name (i.e. an alias). If not marked public,
* assume not found.
*/
if (apropExp != PROPNIL && apropExp->ax_symdef != RHTENIL)
apropName = (APROPNAMEPTR) FetchSym(apropExp->ax_symdef, FALSE);
}
#endif
if (apropName == PROPNIL)
{
/* If not among PUBDEFs, ALIASes, or EXPORTs */
/* Look among undefs */
if (apropUndef == PROPNIL)
apropUndef = (APROPUNDEFPTR) PropRhteLookup(rhte, ATTRUND, FALSE);
if (apropUndef != PROPNIL) /* Should always exist */
{
if ((apropUndef->au_flags & STRONGEXT) ||
(apropUndef->au_flags & UNDECIDED) )
{
/* "Strong" extern */
apropUndef->au_flags &= ~(WEAKEXT | UNDECIDED);
apropUndef->au_flags |= STRONGEXT;
fUndefinedExterns = (FTYPE) TRUE;
/* There are undefined externals */
apropUndef->u.au_rFil =
AddVmProp(apropUndef->u.au_rFil,vrpropFile);
}
else
{
/* "Weak" extern - find default resolution */
apropName = (APROPNAMEPTR) FetchSym(apropUndef->au_Default, FALSE);
}
}
}
}
if (apropName != PROPNIL) /* If among PUBDEFs or EXPDEF's or "weak" extern or ALIASes */
{
mpextprop[extMac] = vrprop; /* Save the property addr */
#if OSEGEXE
if(fNewExe)
mpextflags[extMac] = apropName->an_flags;
/* Save the flags */
#if ODOS3EXE
else
#endif
#endif
#if ODOS3EXE OR OIAPX286
mpextggr[extMac] = apropName->an_ggr;
/* Save the global GRPDEF number */
#endif
#if OSEGEXE
if(apropName->an_flags & FIMPORT)
{ /* If we have a dynamic link */
#if EXE386
mpextgsn[extMac] = gsnImport;
/* Save the thunk segment no. */
mpextra[extMac] = apropName->an_thunk;
/* Save the offset in thunk segment */
#else
mpextgsn[extMac] = apropName->an_module;
/* Save the module specification */
mpextra[extMac] = apropName->an_entry;
/* Save the entry specification */
#endif
}
else /* Else if internal reference */
#endif
{
mpextra[extMac] = apropName->an_ra;
/* Save the offset */
mpextgsn[extMac] = apropName->an_gsn;
/* Save the global SEGDEF number */
}
}
else
{
/* External is undefined */
mpextra[extMac] = 0;
mpextgsn[extMac] = SNNIL;
mpextprop[extMac] = PROPNIL;
#if OSEGEXE
if (fNewExe)
mpextflags[extMac] = 0;
#if ODOS3EXE
else
#endif
#endif
#if ODOS3EXE OR OIAPX286
mpextggr[extMac] = GRNIL;
#endif
}
++extMac; /* Increment public symbol counter */
}
}
LOCAL void NEAR ComDef2(void)
{
int tmp; /* workaround a cl bug */
SBTYPE sb; /* External symbol name */
APROPNAMEPTR apropName; /* Property cell pointer */
while(cbRec > 1) /* While not at end of record */
{
sb[0] = (BYTE) Gets(); /* Read in symbol length */
if(rect == COMDEF)
GetBytes(&sb[1],B2W(sb[0]));/* Read in the text of the symbol */
else
GetLocName(sb); /* Transform local name */
#if CMDXENIX
if(symlen && B2W(sb[0]) > symlen) sb[0] = symlen;
/* Truncate if necessary */
#endif
GetIndex(0,0x7FFF); /* Skip the type index */
tmp = Gets();
switch(tmp)
{
case TYPEFAR:
TypLen(); /* Skip num. elems. field */
/* Fall through ... */
case TYPENEAR:
TypLen(); /* Skip length field */
}
apropName = (APROPNAMEPTR ) PropSymLookup(sb,ATTRPNM,FALSE);
/* Look for symbol among PUBDEFs */
if (apropName == PROPNIL)
{
ExitCode = 4;
Fatal(ER_unrcom); /* Internal error */
}
#if OSEGEXE
if(fNewExe)
mpextflags[extMac] = apropName->an_flags;
/* Save the flags */
#if ODOS3EXE
else
#endif
#endif
#if ODOS3EXE OR OIAPX286
mpextggr[extMac] = apropName->an_ggr;
/* Save the global GRPDEF number */
#endif
#if OSEGEXE
if(fNewExe && (apropName->an_flags & FIMPORT))
DupErr(sb); /* Communal vars can't resolve to dynamic links */
#endif
mpextra[extMac] = apropName->an_ra;
/* Save the offset */
mpextgsn[extMac] = apropName->an_gsn;
/* Save the global SEGDEF number */
mpextprop[extMac] = vrprop; /* Save the property address */
++extMac; /* Increment public symbol counter */
}
}
/****************************************************************
* *
* ObExpandIteratedData: *
* *
* This function expands a LIDATA record and moves it to *
* virtual memory. The function returns a pointer to the *
* start of the next iterated data block (if any). This is a *
* recursive function. *
* See pp. 68-69,63 in "8086 Object Module Formats EPS." *
* *
****************************************************************/
BYTE * ObExpandIteratedData(pb,cBlocks, pSize)
BYTE *pb; /* Pointer into LIDATA buffer */
WORD cBlocks; /* Current block count subfield */
WORD *pSize; /* != NULL if all the caller wants
is the size of expanded block */
{
WORD cNextLevelBlocks;
/* Block count for next level */
RATYPE cRepeat; /* Repeat count */
WORD cbContent; /* Size of content subfield in bytes */
BYTE *pbRet; /* Recursion return value */
DEBUGVALUE(pb); /* Debug info */
DEBUGVALUE(cBlocks); /* Debug info */
DEBUGVALUE(vraCur); /* Debug info */
if(!cBlocks) /* If block count subfield is zero */
{
cbContent = B2W(*pb++); /* Get size of content subfield */
if (pSize!=NULL)
*pSize += cbContent;
#if OIAPX286
if(pSize==NULL)
MoveToVm(cbContent,pb,vsegCur,vraCur - mpsegraFirst[vsegCur]);
/* Move data to virtual memory */
#endif
#if NOT OIAPX286
#if OSEGEXE
if (fNewExe && (pSize==NULL))
DoIteratedFixups(cbContent,pb);/* Do any iterated fixups */
#endif
if(pSize==NULL)
MoveToVm(cbContent,pb,vsegCur,vraCur);
/* Move data to virtual memory */
#if ODOS3EXE
if(!fNewExe)
{
while(cbContent--)
{
if(pb[vcbData] && (pSize==NULL))
RecordSegmentReference(vsegCur,(long)vraCur,B2W(pb[vcbData]));
++vraCur; /* Increment current offset */
++pb; /* Increment buffer pointer */
}
cbContent++;
}
#endif
#endif /* NOT OIAPX286 */
vraCur += cbContent; /* Adjust current offset */
pb += cbContent; /* Move ahead in buffer */
}
else /* Else if non-zero block count */
{
while(cBlocks--) /* While there are blocks to do */
{
#if OMF386
if(vrectData & 1)
{
cRepeat = getword(pb) + ((long)(getword(&pb[2])) << 16);
cNextLevelBlocks = getword(&pb[4]);
pb += 6;
}
else
#endif
{
cRepeat = getword(pb); /* Get repeat count */
cNextLevelBlocks = getword(&pb[2]);
/* Get block count */
pb += 4; /* Skip over fields */
}
ASSERT(cRepeat != 0); /* One hopes it won't happen */
if(!cRepeat) InvalidObject();
/* Must have non-zero repeat count */
while(cRepeat--) pbRet = ObExpandIteratedData(pb,cNextLevelBlocks, pSize);
/* Recurse to expand record */
pb = pbRet; /* Skip over expanded block */
}
}
DEBUGVALUE(pb); /* Debug info */
DEBUGVALUE(rgmi + vcbData + 1); /* Debug info */
ASSERT(pb <= rgmi + vcbData + 1); /* Should be true always */
if(pb > rgmi + vcbData + 1) InvalidObject();
/* Length must agree with format */
return(pb); /* Ret ptr to next iterated data blk */
}
/****************************************************************
* *
* DataBlockToVm: *
* *
* This function moves data from a LEDATA record or a LIDATA *
* record into virtual memory. *
* See pp. 66-69 in "8086 Object Module Formats EPS." *
* *
****************************************************************/
LOCAL void NEAR DataBlockToVM(void)
{
REGISTER BYTE *pb; /* Pointer to data buffer */
REGISTER RECTTYPE MYrect; /* Record type */
DEBUGVALUE(vcbData); /* Debug info */
/*
* In new-format exes, disallow initialization of the stack segment
* if it is in DGROUP.
*/
if(fNewExe && vgsnCur == gsnStack && ggrDGroup != GRNIL &&
mpsegsa[mpgsnseg[mpggrgsn[ggrDGroup]]] == mpsegsa[mpgsnseg[gsnStack]])
return;
MYrect = vrectData; /* Get record type */
/*
* Mask off all but the low bit of vrectData here, since ObExp.
* will call RecordSegmentReference for runtime relocations which
* were postponed until the LIDATA record was expanded.
* RecordSegmentReference will think it's at the earlier phase if
* vrectData is LIDATA, and the reloc won't get generated.
* Leave low bit of vrectData so ObExp. can tell if OMF 386.
*/
#if OMF386
vrectData &= 1;
#else
vrectData = RECTNIL;
#endif
if(TYPEOF(MYrect) == LEDATA) /* If enumerated data record */
{
DEBUGVALUE(vraCur); /* Debug info */
#if RGMI_IN_PLACE
if (!fDebSeg && fNewExe)
{
// If data is going up to or past current end of initialized data,
// omit any trailing null bytes and reset mpsacbinit. Mpsacbinit
// will usually go up but may go down if a common segment over-
// writes previous end data with nulls.
SATYPE sa = mpsegsa[vsegCur];
WORD cb = vcbData;
long cbtot = (long)cb + vraCur;
if ((DWORD) cbtot >= mpsacbinit[sa])
{
if ((DWORD) vraCur < mpsacbinit[sa] ||
(cb = zcheck(rgmi, cb)) != 0)
mpsacbinit[sa] = (long)vraCur + cb;
}
}
#else
#if OIAPX286
if (fDebSeg)
MoveToVm(vcbData,rgmi,vsegCur,vraCur);
else
MoveToVm(vcbData,rgmi,vsegCur,vraCur - mpsegraFirst[vsegCur]);
#else
MoveToVm(vcbData,rgmi,vsegCur,vraCur);
#endif
#endif
/* Move data to virtual memory */
vraCur += vcbData; /* Update current offset */
}
else /* Else if iterated data record */
{
pb = rgmi; /* Get address of buffer */
while((pb = ObExpandIteratedData(pb,1, NULL)) < rgmi + vcbData);
/* Expand and move to VM */
}
DEBUGVALUE(vsegCur); /* Debug info */
#if ODOS3EXE OR OIAPX286
if (!fNewExe && !fDebSeg) mpsegFlags[vsegCur] |= FNOTEMPTY;
#endif
#if OMF386
vrectData = RECTNIL;
#endif
}
/****************************************************************
* *
* LinRec2: *
* *
* This function processes LINNUM records on pass 2. *
* See pp. 51-52 in "8086 Object Module Formats EPS." *
* *
****************************************************************/
void NEAR LinRec2(void)
{
SNTYPE sn; /* SEGDEF index value */
SNTYPE gsn; /* Global SEGDEF no. */
SEGTYPE seg;
WORD ln; /* Line number */
RATYPE ra; /* Offset */
APROPPTR aprop;
AHTEPTR ahte; // Pointer to hash table entry
WORD attr; // COMDAT flags
WORD comdatIdx; // COMDAT index
APROPCOMDATPTR comdat; // Pointer to symbol table entry
DWORD comdatRa; // Offset of the COMDAT symbol
/*
* Get the group index and ignore it, so the linker can work with
* other compilers.
*/
if ((rect & ~1) == LINNUM)
{
// Read regular LINNUM record
GetIndex((WORD)0,(WORD)(grMac - 1));
sn = GetIndex(1, (WORD)(snMac - 1));
gsn = mpsngsn[sn]; /* Get global SEGDEF number */
comdatRa = 0L;
}
else
{
// Read LINSYM record - line numbers for COMDAT
attr = (WORD) Gets();
comdatIdx = GetIndex(1, (WORD)(lnameMac - 1));
comdat = (APROPCOMDATPTR ) PropRhteLookup(mplnamerhte[comdatIdx], ATTRCOMDAT, FALSE);
if (comdat != NULL)
{
gsn = comdat->ac_gsn;
comdatRa = comdat->ac_ra;
}
else
InvalidObject(); /* Invalid module */
}
/* If LINNUM record is empty, don't do anything. */
if(cbRec == 1)
return;
seg = mpgsnseg[gsn];
if(gsn != vgsnLineNosPrev) /* If we weren't doing line numbers */
{ /* for this segment last time */
if(vcln) NEWLINE(bsLst); /* Newline */
fputs("\r\nLine numbers for ",bsLst);
/* Message */
OutFileCur(bsLst); /* File name */
fputs(" segment ",bsLst); /* Message */
aprop = (APROPPTR ) FetchSym(mpgsnrprop[gsn],FALSE);
/* Fetch from virtual memory */
ASSERT(aprop != PROPNIL); /* Should never happen! */
ahte = GetHte(aprop->a_next); /* Get hash table entry */
OutSb(bsLst,GetFarSb(ahte->cch)); /* Segment name */
fputs("\r\n\r\n",bsLst); /* End line, skip a line */
vgsnLineNosPrev = gsn; /* Save global SEGDEF number */
vcln = 0; /* No entries on line yet */
}
while(cbRec > 1) /* While not at checksum */
{
if(vcln >= 4) /* If four entries on this line */
{
vcln = 0; /* Reset counter */
NEWLINE(bsLst); /* Newline */
}
ln = WGets() + QCLinNumDelta; /* Read in line number */
#if OMF386
if (rect & 1)
ra = LGets();
else
#endif
ra = (RATYPE) WGets();
ra += mpgsndra[gsn] + comdatRa; /* Get fixed segment offset */
if(gsn == gsnText && comdatRa && fTextMoved)
ra -= NullDelta;
fprintf(bsLst," %4d %04x:",ln,mpsegsa[seg]);
#if EXE386
if (f386)
fprintf(bsLst,"%08lx",(long) ra);
else
#endif
fprintf(bsLst,"%04x",(WORD) ra);
++vcln; /* Increment counter */
}
}
/****************************************************************
* *
* ProcP2: *
* *
* This function controls the processing of object modules *
* during pass 2. *
* *
****************************************************************/
#pragma check_stack(on)
void NEAR ProcP2(void)
{
#if EXE386
WORD extflags[EXTMAX];
#else
BYTE extflags[EXTMAX];
#endif
SNTYPE extgsn[EXTMAX];
RATYPE extra[EXTMAX];
FTYPE fFirstMod;
FTYPE fModEnd;
#if SYMDEB
WORD bTmp=TRUE;
#endif
#if OXOUT OR OIAPX286
LFATYPE lfa; /* Seek value */
#endif
/* Group associations for EXTDEFs are only used for old exes and
* EXTDEF flags are only used for new exes, so they can share the
* same space. */
#if OSEGEXE
if(fNewExe)
mpextflags = extflags; /* Initialize pointer */
#if ODOS3EXE
else
#endif
#endif
#if ODOS3EXE OR OIAPX286
mpextggr = extflags;
#endif
mpextgsn = extgsn; /* Initialize pointer */
mpextra = extra; /* Initialize pointer */
vgsnLineNosPrev = SNNIL; /* No line numbers from this module */
fFirstMod = (FTYPE) TRUE; /* First module */
for(;;) /* Loop to process modules */
{
snMac = 1; /* Initialize counter */
grMac = 1; /* Initialize counter */
extMac = 1; /* Initialize counter */
lnameMac = 1; /* Initialize counter */
QCExtDefDelta = 0; /* Initialize QC deltas */
QCLinNumDelta = 0;
vrectData = RECTNIL; /* Initialize record type variable */
cbBakpat = 0; /* Initialize */
#if OXOUT OR OIAPX286
lfa = ftell(bsInput); /* Save initial file position */
cbRec = WSGets(); /* Read record length */
if(cbRec == X_MAGIC) fseek(bsInput,(long) CBRUN - sizeof(WORD),1);
/* Skip x.out header if any */
else fseek(bsInput,lfa,0); /* Else return to start */
#endif
#if RGMI_IN_PLACE
rgmi = NULL; /* There is no data available */
vcbData = 0; /* There is really no data, honest */
#endif
fModEnd = FALSE; /* Not end of module */
while(!fModEnd) /* Loop to process object module */
{
rect = getc(bsInput); /* Read record type */
if (IsBadRec(rect))
{
if(fFirstMod) break; /* Break if 1st module invalid */
return; /* Else return */
}
cbRec = getc(bsInput) | (getc(bsInput) << 8);
/* Read record length */
#if ALIGN_REC
if (bsInput->_cnt >= cbRec)
{
pbRec = bsInput->_ptr;
bsInput->_ptr += cbRec;
bsInput->_cnt -= cbRec;
}
else
{
if (cbRec >= sizeof(recbuf))
{
// error -- record too large [rm]
InvalidObject();
}
// read record into contiguous buffer
if (fread(recbuf,1,cbRec,bsInput) == cbRec)
pbRec = recbuf;
}
#endif
lfaLast += cbRec + 3; /* Update current file position */
DEBUGVALUE(rect); /* Debug info */
DEBUGVALUE(cbRec); /* Debug info */
/* If FIXUPP, perform relocation */
if (TYPEOF(rect) == FIXUPP) FixRc2();
else /* Else if not fixup record */
{
if (vrectData != RECTNIL)
{
DataBlockToVM(); /* Move data to virtual memory */
fFarCallTrans = fFarCallTransSave;
/* Restore the /FARCALL state */
}
fDebSeg = FALSE;
switch(TYPEOF(rect)) /* Switch on record type */
{
case SEGDEF:
SegRec2();
break;
case THEADR:
case LHEADR:
fSkipFixups = FALSE;
ModRc1();
break;
case GRPDEF:
GrpRec2();
break;
case EXTDEF:
case LEXTDEF:
case CEXTDEF:
ExtRec2();
break;
case COMDEF:
case LCOMDEF:
ComDef2();
break;
case LNAMES:
case LLNAMES:
LNmRc1((WORD)(TYPEOF(rect) == LLNAMES));
break;
case LINNUM:
case LINSYM:
#if SYMDEB
if (fSymdeb)
bTmp=DoDebSrc();
#endif
if (fLstFileOpen && vfLineNos
#if SYMDEB
&& bTmp
#endif
)
LinRec2();
else
SkipBytes((WORD)(cbRec - 1));
break;
case LEDATA:
case LIDATA:
DataRec();
break;
case MODEND:
#if OVERLAYS
if (!fOverlays) EndRec();
else SkipBytes((WORD)(cbRec - 1));
#else
EndRec();
#endif
fModEnd = (FTYPE) TRUE;
break;
case BAKPAT:
case NBAKPAT:
BakPat();
break;
case COMENT: /* COMENT records are processed in */
/* pass 2 for support of INCDEF for QC */
Gets(); /* Skip byte 1 of comment type field */
if (Gets() == 0xA0)
{ /* if Microsoft OMF extension */
if (Gets() == 0x03)
{ /* QC 2.0 - INCremental DEFinition */
QCExtDefDelta += WGets();
QCLinNumDelta += WGets();
}
}
SkipBytes((WORD)(cbRec - 1));
break;
case COMDAT:
ComDatRc2();
break;
default:
if (rect == EOF)
InvalidObject();
SkipBytes((WORD)(cbRec - 1));
/* Skip to checksum byte */
break;
}
}
DEBUGVALUE(cbRec); /* Debug info */
if(cbRec != 1) break; /* If record length bad */
Gets(); /* Eat the checksum byte */
}
if(!fModEnd)
{
ChkInput(); /* First check for I/O problems */
InvalidObject(); /* Invalid module */
}
++modkey; /* For local symbols */
#if SYMDEB
if (fSymdeb) DebMd2(); /* Module post-processing for ISLAND */
#endif
if(cbBakpat) /* Fix up backpatches if any */
FixBakpat();
if(fLibraryFile) return; /* One at a time from libraries */
fFirstMod = FALSE; /* No longer first module */
}
}
#pragma check_stack(off)