/
cgobj.c
3846 lines (3353 loc) · 108 KB
/
cgobj.c
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// Copyright (C) 1984-1998 by Symantec
// Copyright (C) 2000-2011 by Digital Mars
// All Rights Reserved
// http://www.digitalmars.com
// Written by Walter Bright
/*
* This source file is made available for personal use
* only. The license is in backendlicense.txt
* For any other uses, please contact Digital Mars.
*/
#if !HTOD && (SCPP || MARS)
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>
#include <ctype.h>
#include <direct.h>
#include "filespec.h"
#include "cc.h"
#include "global.h"
#include "cgcv.h"
#include "code.h"
#include "type.h"
#include "outbuf.h"
#include "md5.h"
#if MARS
#include "varstats.h"
struct Loc
{
char *filename;
unsigned linnum;
unsigned charnum;
Loc(int y, int x)
{
linnum = y;
charnum = x;
filename = NULL;
}
};
void error(Loc loc, const char *format, ...);
#endif
#if TARGET_WINDOS
static char __file__[] = __FILE__; // for tassert.h
#include "tassert.h"
#define MULTISCOPE 1 /* account for bug in MultiScope debugger
where it cannot handle a line number
with multiple offsets. We use a bit vector
to filter out the extra offsets.
*/
#define TOOFFSET(a,b) (I32 ? TOLONG(a,b) : TOWORD(a,b))
/**************************
* Record types:
*/
#define RHEADR 0x6E
#define REGINT 0x70
#define REDATA 0x72
#define RIDATA 0x74
#define OVLDEF 0x76
#define ENDREC 0x78
#define BLKDEF 0x7A
#define BLKEND 0x7C
//#define DEBSYM 0x7E
#define THEADR 0x80
#define LHEADR 0x82
#define PEDATA 0x84
#define PIDATA 0x86
#define COMENT 0x88
#define MODEND 0x8A
#define EXTDEF 0x8C
#define TYPDEF 0x8E
#define PUBDEF 0x90
#define PUB386 0x91
#define LOCSYM 0x92
#define LINNUM 0x94
#define LNAMES 0x96
#define SEGDEF 0x98
#define SEG386 0x99
#define GRPDEF 0x9A
#define FIXUPP 0x9C
#define FIX386 0x9D
#define LEDATA 0xA0
#define LED386 0xA1
#define LIDATA 0xA2
#define LID386 0xA3
#define LIBHED 0xA4
#define LIBNAM 0xA6
#define LIBLOC 0xA8
#define LIBDIC 0xAA
#define COMDEF 0xB0
#define LEXTDEF 0xB4
#define LPUBDEF 0xB6
#define LCOMDEF 0xB8
#define CEXTDEF 0xBC
#define COMDAT 0xC2
#define LINSYM 0xC4
#define ALIAS 0xC6
#define LLNAMES 0xCA
// Some definitions for .OBJ files. Trial and error to determine which
// one to use when. Page #s refer to Intel spec on .OBJ files.
// Values for LOCAT byte: (pg. 71)
#define LOCATselfrel 0x8000
#define LOCATsegrel 0xC000
// OR'd with one of the following:
#define LOClobyte 0x0000
#define LOCbase 0x0800
#define LOChibyte 0x1000
#define LOCloader_resolved 0x1400
// Unfortunately, the fixup stuff is different for EASY OMF and Microsoft
#define EASY_LOCoffset 0x1400 // 32 bit offset
#define EASY_LOCpointer 0x1800 // 48 bit seg/offset
#define LOC32offset 0x2400
#define LOC32tlsoffset 0x2800
#define LOC32pointer 0x2C00
#define LOC16offset 0x0400
#define LOC16pointer 0x0C00
#define LOCxx 0x3C00
// FDxxxx are constants for the FIXDAT byte in fixup records (pg. 72)
#define FD_F0 0x00 // segment index
#define FD_F1 0x10 // group index
#define FD_F2 0x20 // external index
#define FD_F4 0x40 // canonic frame of LSEG that contains Location
#define FD_F5 0x50 // Target determines the frame
#define FD_T0 0 // segment index
#define FD_T1 1 // group index
#define FD_T2 2 // external index
#define FD_T4 4 // segment index, 0 displacement
#define FD_T5 5 // group index, 0 displacement
#define FD_T6 6 // external index, 0 displacement
/***************
* Fixup list.
*/
struct FIXUP
{
struct FIXUP *FUnext;
targ_size_t FUoffset; // offset from start of ledata
unsigned short FUlcfd; // LCxxxx | FDxxxx
unsigned short FUframedatum;
unsigned short FUtargetdatum;
};
#define list_fixup(fl) ((struct FIXUP *)list_ptr(fl))
#define seg_is_comdat(seg) ((seg) < 0)
/*****************************
* Ledata records
*/
#define LEDATAMAX (1024-14)
struct Ledatarec
{
char header[14]; // big enough to handle COMDAT header
char data[LEDATAMAX];
int lseg; // segment value
unsigned i; // number of bytes in data
targ_size_t offset; // segment offset of start of data
struct FIXUP *fixuplist; // fixups for this ledata
// For COMDATs
unsigned char flags; // flags byte of COMDAT
unsigned char alloctyp; // allocation type of COMDAT
unsigned char align; // align type
int typidx;
int pubbase;
int pubnamidx;
};
/*****************************
* For defining segments.
*/
#define SEG_ATTR(A,C,B,P) (((A) << 5) | ((C) << 2) | ((B) << 1) | (P))
// Segment alignment A
#define SEG_ALIGN0 0 // absolute segment
#define SEG_ALIGN1 1 // byte align
#define SEG_ALIGN2 2 // word align
#define SEG_ALIGN16 3 // paragraph align
#define SEG_ALIGN4K 4 // 4Kb page align
#define SEG_ALIGN4 5 // dword align
// Segment combine types C
#define SEG_C_ABS 0
#define SEG_C_PUBLIC 2
#define SEG_C_STACK 5
#define SEG_C_COMMON 6
// Segment type P
#define USE16 0
#define USE32 1
#define USE32_CODE (4+2) // use32 + execute/read
#define USE32_DATA (4+3) // use32 + read/write
/*****************************
* Line number support.
*/
#define LINNUMMAX 512
struct Linnum
{
#if MARS
const char *filename; // source file name
#else
Sfile *filptr; // file pointer
#endif
int cseg; // our internal segment number
int seg; // segment/public index
int i; // used in data[]
char data[LINNUMMAX]; // linnum/offset data
};
#define LINRECMAX (2 + 255 * 2) // room for 255 line numbers
/************************************
* State of object file.
*/
struct Objstate
{
const char *modname;
char *csegname;
Outbuffer *buf; // output buffer
int fdsegattr; // far data segment attribute
int csegattr; // code segment attribute
int lastfardatasegi; // SegData[] index of last far data seg
int LOCoffset;
int LOCpointer;
int mlidata;
int mpubdef;
int mfixupp;
int mmodend;
int lnameidx; // index of next LNAMES record
int segidx; // index of next SEGDEF record
int extidx; // index of next EXTDEF record
int pubnamidx; // index of COMDAT public name index
Outbuffer *reset_symbuf; // Keep pointers to reset symbols
Symbol *startaddress; // if !NULL, then Symbol is start address
#ifdef DEBUG
int fixup_count;
#endif
size_t ledatai; // max index used in ledatas[]
// Line numbers
list_t linnum_list;
char *linrec; // line number record
unsigned linreci; // index of next avail in linrec[]
unsigned linrecheader; // size of line record header
unsigned linrecnum; // number of line record entries
list_t linreclist; // list of line records
int mlinnum;
int recseg;
int term;
#if MULTISCOPE
vec_t linvec; // bit vector of line numbers used
vec_t offvec; // and offsets used
#endif
int fisegi; // SegData[] index of FI segment
#if MARS
int fmsegi; // SegData[] of FM segment
int datrefsegi; // SegData[] of DATA pointer ref segment
int tlsrefsegi; // SegData[] of TLS pointer ref segment
Outbuffer *ptrref_buf; // buffer for pointer references
#endif
int tlssegi; // SegData[] of tls segment
int fardataidx;
char pubdata[1024];
int pubdatai;
char extdata[1024];
int extdatai;
// For Obj::far16thunk
int code16segi; // SegData[] index
targ_size_t CODE16offset;
int fltused;
int nullext;
};
Ledatarec **ledatas;
size_t ledatamax;
seg_data **SegData;
static int seg_count;
static int seg_max;
static Objstate obj;
STATIC void obj_defaultlib();
STATIC void objheader (char *csegname);
STATIC char * objmodtoseg (const char *modname);
STATIC void obj_browse_flush();
STATIC int obj_newfarseg (targ_size_t size,int);
STATIC void linnum_flush(void);
STATIC void linnum_term(void);
STATIC void objsegdef (int attr,targ_size_t size,int segnamidx,int classnamidx);
STATIC void obj_modend();
STATIC void objflush_pointerRefs();
STATIC void objfixupp (struct FIXUP *);
STATIC void outextdata();
STATIC void outpubdata();
STATIC Ledatarec *ledata_new(int seg,targ_size_t offset);
static int generate_comdat(Obj* objmod, Symbol *s, bool is_readonly_comdat);
/*******************************
* Output an object file data record.
* Input:
* rectyp = record type
* record -> the data
* reclen = # of bytes in record
*/
void objrecord(unsigned rectyp,const char *record,unsigned reclen)
{ Outbuffer *o = obj.buf;
//printf("rectyp = x%x, record[0] = x%x, reclen = x%x\n",rectyp,record[0],reclen);
o->reserve(reclen + 4);
o->writeByten(rectyp);
o->writeWordn(reclen + 1); // record length includes checksum
o->writen(record,reclen);
o->writeByten(0); // use 0 for checksum
}
/**************************
* Insert an index number.
* Input:
* p -> where to put the 1 or 2 byte index
* index = the 15 bit index
* Returns:
* # of bytes stored
*/
extern void error(const char *filename, unsigned linnum, unsigned charnum, const char *format, ...);
extern void fatal();
void too_many_symbols()
{
#if SCPP
err_fatal(EM_too_many_symbols, 0x7FFF);
#else // MARS
error(NULL, 0, 0, "more than %d symbols in object file", 0x7FFF);
fatal();
#endif
}
#if !DEBUG && TX86 && !defined(_MSC_VER)
__declspec(naked) int __pascal insidx(char *p,unsigned index)
{
#undef AL
#undef AH
#undef DL
#undef DH
_asm
{
mov EAX,index - 4[ESP]
mov ECX,p - 4[ESP]
cmp EAX,0x7F
jae L1
mov [ECX],AL
mov EAX,1
ret 8
L1:
cmp EAX,0x7FFF
ja L2
mov 1[ECX],AL
or EAX,0x8000
mov [ECX],AH
mov EAX,2
ret 8
}
L2:
too_many_symbols();
}
#else
__inline int insidx(char *p,unsigned index)
{
//if (index > 0x7FFF) printf("index = x%x\n",index);
/* OFM spec says it could be <=0x7F, but that seems to cause
* "library is corrupted" messages. Unverified. See Bugzilla 3601
*/
if (index < 0x7F)
{ *p = index;
return 1;
}
else if (index <= 0x7FFF)
{
*(p + 1) = index;
*p = (index >> 8) | 0x80;
return 2;
}
else
{ too_many_symbols();
return 0;
}
}
#endif
/**************************
* Insert a type index number.
* Input:
* p -> where to put the 1 or 2 byte index
* index = the 15 bit index
* Returns:
* # of bytes stored
*/
__inline int instypidx(char *p,unsigned index)
{
if (index <= 127)
{ *p = index;
return 1;
}
else if (index <= 0x7FFF)
{ *(p + 1) = index;
*p = (index >> 8) | 0x80;
return 2;
}
else // overflow
{ *p = 0; // the linker ignores this field anyway
return 1;
}
}
/****************************
* Read index.
*/
#define getindex(p) ((*(p) & 0x80) \
? ((*(unsigned char *)(p) & 0x7F) << 8) | *((unsigned char *)(p) + 1) \
: *(unsigned char *)(p))
/*****************************
* Returns:
* # of bytes stored
*/
#define ONS_OHD 4 // max # of extra bytes added by obj_namestring()
STATIC int obj_namestring(char *p,const char *name)
{ unsigned len;
len = strlen(name);
if (len > 255)
{ p[0] = 0xFF;
p[1] = 0;
#ifdef DEBUG
assert(len <= 0xFFFF);
#endif
TOWORD(p + 2,len);
memcpy(p + 4,name,len);
len += ONS_OHD;
}
else
{ p[0] = len;
memcpy(p + 1,name,len);
len++;
}
return len;
}
/******************************
* Allocate a new segment.
* Return index for the new segment.
*/
seg_data *getsegment()
{
int seg = ++seg_count;
if (seg_count == seg_max)
{
seg_max += 10;
SegData = (seg_data **)mem_realloc(SegData, seg_max * sizeof(seg_data *));
memset(&SegData[seg_count], 0, 10 * sizeof(seg_data *));
}
assert(seg_count < seg_max);
if (SegData[seg])
memset(SegData[seg], 0, sizeof(seg_data));
else
SegData[seg] = (seg_data *)mem_calloc(sizeof(seg_data));
seg_data *pseg = SegData[seg];
pseg->SDseg = seg;
pseg->segidx = 0;
return pseg;
}
/**************************
* Output read only data and generate a symbol for it.
*
*/
symbol * Obj::sym_cdata(tym_t ty,char *p,int len)
{
symbol *s;
alignOffset(CDATA, tysize(ty));
s = symboldata(Offset(CDATA), ty);
s->Sseg = CDATA;
Obj::bytes(CDATA, Offset(CDATA), len, p);
Offset(CDATA) += len;
s->Sfl = FLdata; //FLextern;
return s;
}
/**************************
* Ouput read only data for data.
* Output:
* *pseg segment of that data
* Returns:
* offset of that data
*/
int Obj::data_readonly(char *p, int len, int *pseg)
{
#if MARS
targ_size_t oldoff = Offset(CDATA);
Obj::bytes(CDATA,Offset(CDATA),len,p);
Offset(CDATA) += len;
*pseg = CDATA;
#else
targ_size_t oldoff = Offset(DATA);
Obj::bytes(DATA,Offset(DATA),len,p);
Offset(DATA) += len;
*pseg = DATA;
#endif
return oldoff;
}
int Obj::data_readonly(char *p, int len)
{
int pseg;
return Obj::data_readonly(p, len, &pseg);
}
/*****************************
* Get segment for readonly string literals.
* The linker will pool strings in this section.
* Params:
* sz = number of bytes per character (1, 2, or 4)
* Returns:
* segment index
*/
int Obj::string_literal_segment(unsigned sz)
{
assert(0);
return 0;
}
segidx_t Obj::seg_debugT()
{
return DEBTYP;
}
/******************************
* Perform initialization that applies to all .obj output files.
* Input:
* filename source file name
* csegname code segment name (can be NULL)
*/
Obj *Obj::init(Outbuffer *objbuf, const char *filename, const char *csegname)
{
//printf("Obj::init()\n");
Obj *mobj = new Obj();
Outbuffer *reset_symbuf = obj.reset_symbuf;
if (reset_symbuf)
{
symbol **p = (symbol **)reset_symbuf->buf;
const size_t n = reset_symbuf->size() / sizeof(symbol *);
for (size_t i = 0; i < n; ++i)
symbol_reset(p[i]);
reset_symbuf->setsize(0);
}
else
{
reset_symbuf = new Outbuffer(50 * sizeof(symbol *));
}
memset(&obj,0,sizeof(obj));
obj.buf = objbuf;
obj.buf->reserve(40000);
obj.reset_symbuf = reset_symbuf; // reuse buffer
obj.lastfardatasegi = -1;
obj.mlidata = LIDATA;
obj.mpubdef = PUBDEF;
obj.mfixupp = FIXUPP;
obj.mmodend = MODEND;
obj.mlinnum = LINNUM;
// Reset for different OBJ file formats
if (I32)
{ if (config.flags & CFGeasyomf)
{ obj.LOCoffset = EASY_LOCoffset;
obj.LOCpointer = EASY_LOCpointer;
}
else
{
obj.mlidata = LID386;
obj.mpubdef = PUB386;
obj.mfixupp = FIX386;
obj.mmodend = MODEND + 1;
obj.LOCoffset = LOC32offset;
obj.LOCpointer = LOC32pointer;
}
obj.fdsegattr = SEG_ATTR(SEG_ALIGN16,SEG_C_PUBLIC,0,USE32);
obj.csegattr = SEG_ATTR(SEG_ALIGN4, SEG_C_PUBLIC,0,USE32);
}
else
{
obj.LOCoffset = LOC16offset;
obj.LOCpointer = LOC16pointer;
obj.fdsegattr = SEG_ATTR(SEG_ALIGN16,SEG_C_PUBLIC,0,USE16);
obj.csegattr = SEG_ATTR(SEG_ALIGN2, SEG_C_PUBLIC,0,USE16);
}
if (config.flags4 & CFG4speed && // if optimized for speed
config.target_cpu == TARGET_80486)
// 486 is only CPU that really benefits from alignment
obj.csegattr = I32 ? SEG_ATTR(SEG_ALIGN16, SEG_C_PUBLIC,0,USE32)
: SEG_ATTR(SEG_ALIGN16, SEG_C_PUBLIC,0,USE16);
if (!SegData)
{ seg_max = UDATA + 10;
SegData = (seg_data **)mem_calloc(seg_max * sizeof(seg_data *));
}
for (int i = 0; i < seg_max; i++)
{
if (SegData[i])
memset(SegData[i], 0, sizeof(seg_data));
else
SegData[i] = (seg_data *)mem_calloc(sizeof(seg_data));
}
SegData[CODE]->SDseg = CODE;
SegData[DATA]->SDseg = DATA;
SegData[CDATA]->SDseg = CDATA;
SegData[UDATA]->SDseg = UDATA;
SegData[CODE]->segidx = CODE;
SegData[DATA]->segidx = DATA;
SegData[CDATA]->segidx = CDATA;
SegData[UDATA]->segidx = UDATA;
seg_count = UDATA;
if (config.fulltypes)
{
SegData[DEBSYM]->SDseg = DEBSYM;
SegData[DEBTYP]->SDseg = DEBTYP;
SegData[DEBSYM]->segidx = DEBSYM;
SegData[DEBTYP]->segidx = DEBTYP;
seg_count = DEBTYP;
}
mobj->theadr(filename);
obj.modname = filename;
if (!csegname || !*csegname) // if no code seg name supplied
obj.csegname = objmodtoseg(obj.modname); // generate one
else
obj.csegname = mem_strdup(csegname); // our own copy
objheader(obj.csegname);
mobj->segment_group(0,0,0,0); // obj seg and grp info
ledata_new(cseg,0); // so ledata is never NULL
if (config.fulltypes) // if full typing information
{ objmod = mobj;
cv_init(); // initialize debug output code
}
return mobj;
}
/**************************
* Initialize the start of object output for this particular .obj file.
*/
void Obj::initfile(const char *filename,const char *csegname, const char *modname)
{
}
/***************************
* Fixup and terminate object file.
*/
void Obj::termfile()
{
}
/*********************************
* Terminate package.
*/
void Obj::term(const char *objfilename)
{
//printf("Obj::term()\n");
list_t dl;
unsigned long size;
#if SCPP
if (!errcnt)
#endif
{
obj_defaultlib();
objflush_pointerRefs();
outfixlist(); // backpatches
}
if (config.fulltypes)
cv_term(); // write out final debug info
outextdata(); // finish writing EXTDEFs
outpubdata(); // finish writing PUBDEFs
// Put out LEDATA records and associated fixups
for (size_t i = 0; i < obj.ledatai; i++)
{ Ledatarec *d = ledatas[i];
if (d->i) // if any data in this record
{ // Fill in header
int headersize;
int rectyp;
assert(d->lseg > 0 && d->lseg <= seg_count);
int lseg = SegData[d->lseg]->segidx;
char header[sizeof(d->header)];
if (seg_is_comdat(lseg)) // if COMDAT
{
header[0] = d->flags | (d->offset ? 1 : 0); // continuation flag
header[1] = d->alloctyp;
header[2] = d->align;
TOOFFSET(header + 3,d->offset);
headersize = 3 + intsize;
headersize += instypidx(header + headersize,d->typidx);
if ((header[1] & 0x0F) == 0)
{ // Group index
header[headersize] = (d->pubbase == DATA) ? 1 : 0;
headersize++;
// Segment index
headersize += insidx(header + headersize,d->pubbase);
}
headersize += insidx(header + headersize,d->pubnamidx);
rectyp = I32 ? COMDAT + 1 : COMDAT;
}
else
{
rectyp = LEDATA;
headersize = insidx(header,lseg);
if (intsize == LONGSIZE || d->offset & ~0xFFFFL)
{ if (!(config.flags & CFGeasyomf))
rectyp++;
TOLONG(header + headersize,d->offset);
headersize += 4;
}
else
{
TOWORD(header + headersize,d->offset);
headersize += 2;
}
}
assert(headersize <= sizeof(d->header));
// Right-justify data in d->header[]
memcpy(d->header + sizeof(d->header) - headersize,header,headersize);
//printf("objrecord(rectyp=x%02x, d=%p, p=%p, size = %d)\n",
//rectyp,d,d->header + (sizeof(d->header) - headersize),d->i + headersize);
objrecord(rectyp,d->header + (sizeof(d->header) - headersize),
d->i + headersize);
objfixupp(d->fixuplist);
}
}
#if TERMCODE
//list_free(&obj.ledata_list,mem_freefp);
#endif
linnum_term();
obj_modend();
size = obj.buf->size();
obj.buf->setsize(0); // rewind file
Obj::theadr(obj.modname);
objheader(obj.csegname);
mem_free(obj.csegname);
Obj::segment_group(SegData[CODE]->SDoffset, SegData[DATA]->SDoffset, SegData[CDATA]->SDoffset, SegData[UDATA]->SDoffset); // do real sizes
// Update any out-of-date far segment sizes
for (size_t i = 0; i <= seg_count; i++)
{ seg_data *f = SegData[i];
if (f->isfarseg && f->origsize != f->SDoffset)
{ obj.buf->setsize(f->seek);
objsegdef(f->attr,f->SDoffset,f->lnameidx,f->classidx);
}
}
//mem_free(obj.farseg);
//printf("Ledata max = %d\n", obj.ledatai);
#if 0
printf("Max # of fixups = %d\n",obj.fixup_count);
#endif
obj.buf->setsize(size);
}
/*****************************
* Line number support.
*/
/***************************
* Record line number linnum at offset.
* Params:
* srcpos = source file position
* seg = segment it corresponds to (negative for COMDAT segments)
* offset = offset within seg
* pubnamidx = public name index
* obj.mlinnum = LINNUM or LINSYM
*/
void Obj::linnum(Srcpos srcpos,int seg,targ_size_t offset)
{
#if MARS
varStats.recordLineOffset(srcpos, offset);
#endif
unsigned linnum = srcpos.Slinnum;
#if 0
#if MARS || SCPP
printf("Obj::linnum(seg=%d, offset=0x%lx) ", seg, offset);
#endif
srcpos.print("");
#endif
char linos2 = config.exe == EX_OS2 && !seg_is_comdat(SegData[seg]->segidx);
#if MARS
if (!obj.term &&
(seg_is_comdat(SegData[seg]->segidx) || (srcpos.Sfilename && srcpos.Sfilename != obj.modname)))
#else
if (!srcpos.Sfilptr)
return;
sfile_debug(&srcpos_sfile(srcpos));
if (!obj.term && (!(srcpos_sfile(srcpos).SFflags & SFtop) || (seg_is_comdat(SegData[seg]->segidx) && !obj.term)))
#endif
{ // Not original source file, or a COMDAT.
// Save data away and deal with it at close of compile.
// It is done this way because presumably 99% of the lines
// will be in the original source file, so we wish to minimize
// memory consumption and maximize speed.
list_t ll;
struct Linnum *ln;
if (linos2)
return; // BUG: not supported under OS/2
for (ll = obj.linnum_list; 1; ll = list_next(ll))
{
if (!ll)
{
ln = (struct Linnum *) mem_calloc(sizeof(struct Linnum));
#if MARS
ln->filename = srcpos.Sfilename;
#else
ln->filptr = *srcpos.Sfilptr;
#endif
ln->cseg = seg;
ln->seg = obj.pubnamidx;
list_prepend(&obj.linnum_list,ln);
break;
}
ln = (Linnum *)list_ptr(ll);
if (
#if MARS
(ln->filename == srcpos.Sfilename) &&
#endif
#if SCPP
(ln->filptr == *srcpos.Sfilptr) &&
#endif
ln->cseg == seg &&
ln->i < LINNUMMAX - 6)
break;
}
TOWORD(&ln->data[ln->i],linnum);
TOOFFSET(&ln->data[ln->i + 2],offset);
ln->i += 2 + intsize;
}
else
{
if (linos2 && obj.linreci > LINRECMAX - 8)
obj.linrec = NULL; // allocate a new one
else if (seg != obj.recseg)
linnum_flush();
if (!obj.linrec) // if not allocated
{ obj.linrec = (char *) mem_calloc(LINRECMAX);
obj.linrec[0] = 0; // base group / flags
obj.linrecheader = 1 + insidx(obj.linrec + 1,seg_is_comdat(SegData[seg]->segidx) ? obj.pubnamidx : SegData[seg]->segidx);
obj.linreci = obj.linrecheader;
obj.recseg = seg;
#if MULTISCOPE
if (!obj.linvec)
{ obj.linvec = vec_calloc(1000);
obj.offvec = vec_calloc(1000);
}
#endif
if (linos2)
{
if (!obj.linreclist) // if first line number record
obj.linreci += 8; // leave room for header
list_append(&obj.linreclist,obj.linrec);
}
// Select record type to use
obj.mlinnum = seg_is_comdat(SegData[seg]->segidx) ? LINSYM : LINNUM;
if (I32 && !(config.flags & CFGeasyomf))
obj.mlinnum++;
}
else if (obj.linreci > LINRECMAX - (2 + intsize))
{ objrecord(obj.mlinnum,obj.linrec,obj.linreci); // output data
obj.linreci = obj.linrecheader;
if (seg_is_comdat(SegData[seg]->segidx)) // if LINSYM record
obj.linrec[0] |= 1; // continuation bit
}
#if MULTISCOPE
if (linnum >= vec_numbits(obj.linvec))
obj.linvec = vec_realloc(obj.linvec,linnum + 1000);
if (offset >= vec_numbits(obj.offvec))
{
if (offset < 0xFF00) // otherwise we overflow ph_malloc()
obj.offvec = vec_realloc(obj.offvec,offset * 2);
}
if (
#if 1 // disallow multiple offsets per line
!vec_testbit(linnum,obj.linvec) && // if linnum not already used
#endif
// disallow multiple lines per offset
(offset >= 0xFF00 || !vec_testbit(offset,obj.offvec))) // and offset not already used
#endif
{
#if MULTISCOPE
vec_setbit(linnum,obj.linvec); // mark linnum as used
if (offset < 0xFF00)
vec_setbit(offset,obj.offvec); // mark offset as used
#endif