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outobj.c
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outobj.c
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/* outobj.c output routines for the Netwide Assembler to produce
* .OBJ object files
*
* The Netwide Assembler is copyright (C) 1996 Simon Tatham and
* Julian Hall. All rights reserved. The software is
* redistributable under the licence given in the file "Licence"
* distributed in the NASM archive.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "nasm.h"
#include "nasmlib.h"
#include "outform.h"
#ifdef OF_OBJ
/*
* outobj.c is divided into two sections. The first section is low level
* routines for creating obj records; It has nearly zero NASM specific
* code. The second section is high level routines for processing calls and
* data structures from the rest of NASM into obj format.
*
* It should be easy (though not zero work) to lift the first section out for
* use as an obj file writer for some other assembler or compiler.
*/
/*
* These routines are built around the ObjRecord data struture. An ObjRecord
* holds an object file record that may be under construction or complete.
*
* A major function of these routines is to support continuation of an obj
* record into the next record when the maximum record size is exceeded. The
* high level code does not need to worry about where the record breaks occur.
* It does need to do some minor extra steps to make the automatic continuation
* work. Those steps may be skipped for records where the high level knows no
* continuation could be required.
*
* 1) An ObjRecord is allocated and cleared by obj_new, or an existing ObjRecord
* is cleared by obj_clear.
*
* 2) The caller should fill in .type.
*
* 3) If the record is continuable and there is processing that must be done at
* the start of each record then the caller should fill in .ori with the
* address of the record initializer routine.
*
* 4) If the record is continuable and it should be saved (rather than emitted
* immediately) as each record is done, the caller should set .up to be a
* pointer to a location in which the caller keeps the master pointer to the
* ObjRecord. When the record is continued, the obj_bump routine will then
* allocate a new ObjRecord structure and update the master pointer.
*
* 5) If the .ori field was used then the caller should fill in the .parm with
* any data required by the initializer.
*
* 6) The caller uses the routines: obj_byte, obj_word, obj_rword, obj_dword,
* obj_x, obj_index, obj_value and obj_name to fill in the various kinds of
* data required for this record.
*
* 7) If the record is continuable, the caller should call obj_commit at each
* point where breaking the record is permitted.
*
* 8) To write out the record, the caller should call obj_emit2. If the
* caller has called obj_commit for all data written then he can get slightly
* faster code by calling obj_emit instead of obj_emit2.
*
* Most of these routines return an ObjRecord pointer. This will be the input
* pointer most of the time and will be the new location if the ObjRecord
* moved as a result of the call. The caller may ignore the return value in
* three cases: It is a "Never Reallocates" routine; or The caller knows
* continuation is not possible; or The caller uses the master pointer for the
* next operation.
*/
#define RECORD_MAX 1024 /* maximum size of _any_ record */
#define OBJ_PARMS 3 /* maximum .parm used by any .ori routine */
#define FIX_08_LOW 0x8000 /* location type for various fixup subrecords */
#define FIX_16_OFFSET 0x8400
#define FIX_16_SELECTOR 0x8800
#define FIX_32_POINTER 0x8C00
#define FIX_08_HIGH 0x9000
#define FIX_32_OFFSET 0xA400
#define FIX_48_POINTER 0xAC00
enum RecordID { /* record ID codes */
THEADR = 0x80, /* module header */
COMENT = 0x88, /* comment record */
LINNUM = 0x94, /* line number record */
LNAMES = 0x96, /* list of names */
SEGDEF = 0x98, /* segment definition */
GRPDEF = 0x9A, /* group definition */
EXTDEF = 0x8C, /* external definition */
PUBDEF = 0x90, /* public definition */
COMDEF = 0xB0, /* common definition */
LEDATA = 0xA0, /* logical enumerated data */
FIXUPP = 0x9C, /* fixups (relocations) */
MODEND = 0x8A /* module end */
};
enum ComentID { /* ID codes for comment records */
dEXTENDED = 0xA1, /* tells that we are using translator-specific extensions */
dLINKPASS = 0xA2, /* link pass 2 marker */
dTYPEDEF = 0xE3, /* define a type */
dSYM = 0xE6, /* symbol debug record */
dFILNAME = 0xE8, /* file name record */
dCOMPDEF = 0xEA /* compiler type info */
};
typedef struct ObjRecord ObjRecord;
typedef void ORI(ObjRecord *orp);
struct ObjRecord {
ORI *ori; /* Initialization routine */
int used; /* Current data size */
int committed; /* Data size at last boundary */
int x_size; /* (see obj_x) */
unsigned int type; /* Record type */
ObjRecord *child; /* Associated record below this one */
ObjRecord **up; /* Master pointer to this ObjRecord */
ObjRecord *back; /* Previous part of this record */
unsigned long parm[OBJ_PARMS]; /* Parameters for ori routine */
unsigned char buf[RECORD_MAX];
};
static void obj_fwrite(ObjRecord *orp);
static void ori_ledata(ObjRecord *orp);
static void ori_pubdef(ObjRecord *orp);
static void ori_null(ObjRecord *orp);
static ObjRecord *obj_commit(ObjRecord *orp);
static void obj_write_fixup (ObjRecord *orp, int bytes,
int segrel, long seg, long wrt);
static int obj_uppercase; /* Flag: all names in uppercase */
/*
* Clear an ObjRecord structure. (Never reallocates).
* To simplify reuse of ObjRecord's, .type, .ori and .parm are not cleared.
*/
static ObjRecord *obj_clear(ObjRecord *orp)
{
orp->used = 0;
orp->committed = 0;
orp->x_size = 0;
orp->child = NULL;
orp->up = NULL;
orp->back = NULL;
return (orp);
}
/*
* Emit an ObjRecord structure. (Never reallocates).
* The record is written out preceeded (recursively) by its previous part (if
* any) and followed (recursively) by its child (if any).
* The previous part and the child are freed. The main ObjRecord is cleared,
* not freed.
*/
static ObjRecord *obj_emit(ObjRecord *orp)
{
if (orp->back) {
obj_emit(orp->back);
nasm_free(orp->back);
}
if (orp->committed)
obj_fwrite(orp);
if (orp->child) {
obj_emit(orp->child);
nasm_free(orp->child);
}
return (obj_clear(orp));
}
/*
* Commit and Emit a record. (Never reallocates).
*/
static ObjRecord *obj_emit2(ObjRecord *orp)
{
obj_commit(orp);
return (obj_emit(orp));
}
/*
* Allocate and clear a new ObjRecord; Also sets .ori to ori_null
*/
static ObjRecord *obj_new(void)
{
ObjRecord *orp;
orp = obj_clear( nasm_malloc(sizeof(ObjRecord)) );
orp->ori = ori_null;
return (orp);
}
/*
* Advance to the next record because the existing one is full or its x_size
* is incompatible.
* Any uncommited data is moved into the next record.
*/
static ObjRecord *obj_bump(ObjRecord *orp)
{
ObjRecord *nxt;
int used = orp->used;
int committed = orp->committed;
if (orp->up) {
*orp->up = nxt = obj_new();
nxt->ori = orp->ori;
nxt->type = orp->type;
nxt->up = orp->up;
nxt->back = orp;
memcpy( nxt->parm, orp->parm, sizeof(orp->parm));
} else
nxt = obj_emit(orp);
used -= committed;
if (used) {
nxt->committed = 1;
nxt->ori (nxt);
nxt->committed = nxt->used;
memcpy( nxt->buf + nxt->committed, orp->buf + committed, used);
nxt->used = nxt->committed + used;
}
return (nxt);
}
/*
* Advance to the next record if necessary to allow the next field to fit.
*/
static ObjRecord *obj_check(ObjRecord *orp, int size)
{
if (orp->used + size > RECORD_MAX)
orp = obj_bump(orp);
if (!orp->committed) {
orp->committed = 1;
orp->ori (orp);
orp->committed = orp->used;
}
return (orp);
}
/*
* All data written so far is commited to the current record (won't be moved to
* the next record in case of continuation).
*/
static ObjRecord *obj_commit(ObjRecord *orp)
{
orp->committed = orp->used;
return (orp);
}
/*
* Write a byte
*/
static ObjRecord *obj_byte(ObjRecord *orp, unsigned char val)
{
orp = obj_check(orp, 1);
orp->buf[orp->used] = val;
orp->used++;
return (orp);
}
/*
* Write a word
*/
static ObjRecord *obj_word(ObjRecord *orp, unsigned int val)
{
orp = obj_check(orp, 2);
orp->buf[orp->used] = val;
orp->buf[orp->used+1] = val >> 8;
orp->used += 2;
return (orp);
}
/*
* Write a reversed word
*/
static ObjRecord *obj_rword(ObjRecord *orp, unsigned int val)
{
orp = obj_check(orp, 2);
orp->buf[orp->used] = val >> 8;
orp->buf[orp->used+1] = val;
orp->used += 2;
return (orp);
}
/*
* Write a dword
*/
static ObjRecord *obj_dword(ObjRecord *orp, unsigned long val)
{
orp = obj_check(orp, 4);
orp->buf[orp->used] = val;
orp->buf[orp->used+1] = val >> 8;
orp->buf[orp->used+2] = val >> 16;
orp->buf[orp->used+3] = val >> 24;
orp->used += 4;
return (orp);
}
/*
* All fields of "size x" in one obj record must be the same size (either 16
* bits or 32 bits). There is a one bit flag in each record which specifies
* which.
* This routine is used to force the current record to have the desired
* x_size. x_size is normally automatic (using obj_x), so that this
* routine should be used outside obj_x, only to provide compatibility with
* linkers that have bugs in their processing of the size bit.
*/
static ObjRecord *obj_force(ObjRecord *orp, int x)
{
if (orp->x_size == (x^48))
orp = obj_bump(orp);
orp->x_size = x;
return (orp);
}
/*
* This routine writes a field of size x. The caller does not need to worry at
* all about whether 16-bits or 32-bits are required.
*/
static ObjRecord *obj_x(ObjRecord *orp, unsigned long val)
{
if (orp->type & 1)
orp->x_size = 32;
if (val > 0xFFFF)
orp = obj_force(orp, 32);
if (orp->x_size == 32)
return (obj_dword(orp, val));
orp->x_size = 16;
return (obj_word(orp, val));
}
/*
* Writes an index
*/
static ObjRecord *obj_index(ObjRecord *orp, unsigned int val)
{
if (val < 128)
return ( obj_byte(orp, val) );
return (obj_word(orp, (val>>8) | (val<<8) | 0x80));
}
/*
* Writes a variable length value
*/
static ObjRecord *obj_value(ObjRecord *orp, unsigned long val)
{
if (val <= 128)
return ( obj_byte(orp, val) );
if (val <= 0xFFFF) {
orp = obj_byte(orp, 129);
return ( obj_word(orp, val) );
}
if (val <= 0xFFFFFF)
return ( obj_dword(orp, (val<<8) + 132 ) );
orp = obj_byte(orp, 136);
return ( obj_dword(orp, val) );
}
/*
* Writes a counted string
*/
static ObjRecord *obj_name(ObjRecord *orp, char *name)
{
int len = strlen(name);
unsigned char *ptr;
orp = obj_check(orp, len+1);
ptr = orp->buf + orp->used;
*ptr++ = len;
orp->used += len+1;
if (obj_uppercase)
while (--len >= 0) {
*ptr++ = toupper(*name);
name++;
} else
memcpy(ptr, name, len);
return (orp);
}
/*
* Initializer for an LEDATA record.
* parm[0] = offset
* parm[1] = segment index
* During the use of a LEDATA ObjRecord, parm[0] is constantly updated to
* represent the offset that would be required if the record were split at the
* last commit point.
* parm[2] is a copy of parm[0] as it was when the current record was initted.
*/
static void ori_ledata(ObjRecord *orp)
{
obj_index (orp, orp->parm[1]);
orp->parm[2] = orp->parm[0];
obj_x (orp, orp->parm[0]);
}
/*
* Initializer for a PUBDEF record.
* parm[0] = group index
* parm[1] = segment index
* parm[2] = frame (only used when both indexes are zero)
*/
static void ori_pubdef(ObjRecord *orp)
{
obj_index (orp, orp->parm[0]);
obj_index (orp, orp->parm[1]);
if ( !(orp->parm[0] | orp->parm[1]) )
obj_word (orp, orp->parm[2]);
}
/*
* Initializer for a LINNUM record.
* parm[0] = group index
* parm[1] = segment index
*/
static void ori_linnum(ObjRecord *orp)
{
obj_index (orp, orp->parm[0]);
obj_index (orp, orp->parm[1]);
}
/*
* Initializer for a local vars record.
*/
static void ori_local(ObjRecord *orp)
{
obj_byte (orp, 0x40);
obj_byte (orp, dSYM);
}
/*
* Null initializer for records that continue without any header info
*/
static void ori_null(ObjRecord *orp)
{
(void) orp; /* Do nothing */
}
/*
* This concludes the low level section of outobj.c
*/
static char obj_infile[FILENAME_MAX];
static efunc error;
static evalfunc evaluate;
static ldfunc deflabel;
static FILE *ofp;
static long first_seg;
static int any_segs;
static int passtwo;
static int arrindex;
#define GROUP_MAX 256 /* we won't _realistically_ have more
* than this many segs in a group */
#define EXT_BLKSIZ 256 /* block size for externals list */
struct Segment; /* need to know these structs exist */
struct Group;
struct LineNumber {
struct LineNumber *next;
struct Segment *segment;
long offset;
long lineno;
};
static struct FileName {
struct FileName *next;
char *name;
struct LineNumber *lnhead, **lntail;
int index;
} *fnhead, **fntail;
static struct Array {
struct Array *next;
unsigned size;
int basetype;
} *arrhead, **arrtail;
#define ARRAYBOT 31 /* magic number for first array index */
static struct Public {
struct Public *next;
char *name;
long offset;
long segment; /* only if it's far-absolute */
int type; /* only for local debug syms */
} *fpubhead, **fpubtail, *last_defined;
static struct External {
struct External *next;
char *name;
long commonsize;
long commonelem; /* element size if FAR, else zero */
int index; /* OBJ-file external index */
enum {
DEFWRT_NONE, /* no unusual default-WRT */
DEFWRT_STRING, /* a string we don't yet understand */
DEFWRT_SEGMENT, /* a segment */
DEFWRT_GROUP /* a group */
} defwrt_type;
union {
char *string;
struct Segment *seg;
struct Group *grp;
} defwrt_ptr;
struct External *next_dws; /* next with DEFWRT_STRING */
} *exthead, **exttail, *dws;
static int externals;
static struct ExtBack {
struct ExtBack *next;
struct External *exts[EXT_BLKSIZ];
} *ebhead, **ebtail;
static struct Segment {
struct Segment *next;
long index; /* the NASM segment id */
long obj_index; /* the OBJ-file segment index */
struct Group *grp; /* the group it belongs to */
unsigned long currentpos;
long align; /* can be SEG_ABS + absolute addr */
enum {
CMB_PRIVATE = 0,
CMB_PUBLIC = 2,
CMB_STACK = 5,
CMB_COMMON = 6
} combine;
long use32; /* is this segment 32-bit? */
struct Public *pubhead, **pubtail, *lochead, **loctail;
char *name;
char *segclass, *overlay; /* `class' is a C++ keyword :-) */
ObjRecord *orp;
} *seghead, **segtail, *obj_seg_needs_update;
static struct Group {
struct Group *next;
char *name;
long index; /* NASM segment id */
long obj_index; /* OBJ-file group index */
long nentries; /* number of elements... */
long nindices; /* ...and number of index elts... */
union {
long index;
char *name;
} segs[GROUP_MAX]; /* ...in this */
} *grphead, **grptail, *obj_grp_needs_update;
static struct ImpDef {
struct ImpDef *next;
char *extname;
char *libname;
unsigned int impindex;
char *impname;
} *imphead, **imptail;
static struct ExpDef {
struct ExpDef *next;
char *intname;
char *extname;
unsigned int ordinal;
int flags;
} *exphead, **exptail;
#define EXPDEF_FLAG_ORDINAL 0x80
#define EXPDEF_FLAG_RESIDENT 0x40
#define EXPDEF_FLAG_NODATA 0x20
#define EXPDEF_MASK_PARMCNT 0x1F
static long obj_entry_seg, obj_entry_ofs;
struct ofmt of_obj;
static long obj_segment (char *, int, int *);
static void obj_write_file(int debuginfo);
static int obj_directive (char *, char *, int);
static void obj_init (FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval)
{
ofp = fp;
error = errfunc;
evaluate = eval;
deflabel = ldef;
first_seg = seg_alloc();
any_segs = FALSE;
fpubhead = NULL;
fpubtail = &fpubhead;
exthead = NULL;
exttail = &exthead;
imphead = NULL;
imptail = &imphead;
exphead = NULL;
exptail = &exphead;
dws = NULL;
externals = 0;
ebhead = NULL;
ebtail = &ebhead;
seghead = obj_seg_needs_update = NULL;
segtail = &seghead;
grphead = obj_grp_needs_update = NULL;
grptail = &grphead;
obj_entry_seg = NO_SEG;
obj_uppercase = FALSE;
passtwo = 0;
of_obj.current_dfmt->init (&of_obj,NULL,fp,errfunc);
}
static int obj_set_info(enum geninfo type, char **val)
{
(void) type;
(void) val;
return 0;
}
static void obj_cleanup (int debuginfo)
{
obj_write_file(debuginfo);
of_obj.current_dfmt->cleanup();
fclose (ofp);
while (seghead) {
struct Segment *segtmp = seghead;
seghead = seghead->next;
while (segtmp->pubhead) {
struct Public *pubtmp = segtmp->pubhead;
segtmp->pubhead = pubtmp->next;
nasm_free (pubtmp->name);
nasm_free (pubtmp);
}
nasm_free (segtmp->segclass);
nasm_free (segtmp->overlay);
nasm_free (segtmp);
}
while (fpubhead) {
struct Public *pubtmp = fpubhead;
fpubhead = fpubhead->next;
nasm_free (pubtmp->name);
nasm_free (pubtmp);
}
while (exthead) {
struct External *exttmp = exthead;
exthead = exthead->next;
nasm_free (exttmp);
}
while (imphead) {
struct ImpDef *imptmp = imphead;
imphead = imphead->next;
nasm_free (imptmp->extname);
nasm_free (imptmp->libname);
nasm_free (imptmp->impname); /* nasm_free won't mind if it's NULL */
nasm_free (imptmp);
}
while (exphead) {
struct ExpDef *exptmp = exphead;
exphead = exphead->next;
nasm_free (exptmp->extname);
nasm_free (exptmp->intname);
nasm_free (exptmp);
}
while (ebhead) {
struct ExtBack *ebtmp = ebhead;
ebhead = ebhead->next;
nasm_free (ebtmp);
}
while (grphead) {
struct Group *grptmp = grphead;
grphead = grphead->next;
nasm_free (grptmp);
}
}
static void obj_ext_set_defwrt (struct External *ext, char *id)
{
struct Segment *seg;
struct Group *grp;
for (seg = seghead; seg; seg = seg->next)
if (!strcmp(seg->name, id)) {
ext->defwrt_type = DEFWRT_SEGMENT;
ext->defwrt_ptr.seg = seg;
nasm_free (id);
return;
}
for (grp = grphead; grp; grp = grp->next)
if (!strcmp(grp->name, id)) {
ext->defwrt_type = DEFWRT_GROUP;
ext->defwrt_ptr.grp = grp;
nasm_free (id);
return;
}
ext->defwrt_type = DEFWRT_STRING;
ext->defwrt_ptr.string = id;
ext->next_dws = dws;
dws = ext;
}
static void obj_deflabel (char *name, long segment,
long offset, int is_global, char *special)
{
/*
* We have three cases:
*
* (i) `segment' is a segment-base. If so, set the name field
* for the segment or group structure it refers to, and then
* return.
*
* (ii) `segment' is one of our segments, or a SEG_ABS segment.
* Save the label position for later output of a PUBDEF record.
* (Or a MODPUB, if we work out how.)
*
* (iii) `segment' is not one of our segments. Save the label
* position for later output of an EXTDEF, and also store a
* back-reference so that we can map later references to this
* segment number to the external index.
*/
struct External *ext;
struct ExtBack *eb;
struct Segment *seg;
int i;
int used_special = FALSE; /* have we used the special text? */
/*
* If it's a special-retry from pass two, discard it.
*/
if (is_global == 3)
return;
/*
* First check for the double-period, signifying something
* unusual.
*/
if (name[0] == '.' && name[1] == '.' && name[2] != '@') {
if (!strcmp(name, "..start")) {
obj_entry_seg = segment;
obj_entry_ofs = offset;
return;
}
error (ERR_NONFATAL, "unrecognised special symbol `%s'", name);
}
/*
* Case (i):
*/
if (obj_seg_needs_update) {
obj_seg_needs_update->name = name;
return;
} else if (obj_grp_needs_update) {
obj_grp_needs_update->name = name;
return;
}
if (segment < SEG_ABS && segment != NO_SEG && segment % 2)
return;
if (segment >= SEG_ABS || segment == NO_SEG) {
/*
* SEG_ABS subcase of (ii).
*/
if (is_global) {
struct Public *pub;
pub = *fpubtail = nasm_malloc(sizeof(*pub));
fpubtail = &pub->next;
pub->next = NULL;
pub->name = nasm_strdup(name);
pub->offset = offset;
pub->segment = (segment == NO_SEG ? 0 : segment & ~SEG_ABS);
}
if (special)
error(ERR_NONFATAL, "OBJ supports no special symbol features"
" for this symbol type");
return;
}
/*
* If `any_segs' is still FALSE, we might need to define a
* default segment, if they're trying to declare a label in
* `first_seg'.
*/
if (!any_segs && segment == first_seg) {
int tempint; /* ignored */
if (segment != obj_segment("__NASMDEFSEG", 2, &tempint))
error (ERR_PANIC, "strange segment conditions in OBJ driver");
}
for (seg = seghead; seg && is_global; seg = seg->next)
if (seg->index == segment) {
struct Public *loc = nasm_malloc (sizeof(*loc));
/*
* Case (ii). Maybe MODPUB someday?
*/
*seg->pubtail = loc;
seg->pubtail = &loc->next;
loc->next = NULL;
loc->name = nasm_strdup(name);
loc->offset = offset;
if (special)
error(ERR_NONFATAL, "OBJ supports no special symbol features"
" for this symbol type");
return;
}
/*
* Case (iii).
*/
if (is_global) {
ext = *exttail = nasm_malloc(sizeof(*ext));
ext->next = NULL;
exttail = &ext->next;
ext->name = name;
ext->defwrt_type = DEFWRT_NONE;
if (is_global == 2) {
ext->commonsize = offset;
ext->commonelem = 1; /* default FAR */
} else
ext->commonsize = 0;
}
else
return;
/*
* Now process the special text, if any, to find default-WRT
* specifications and common-variable element-size and near/far
* specifications.
*/
while (special && *special) {
used_special = TRUE;
/*
* We might have a default-WRT specification.
*/
if (!nasm_strnicmp(special, "wrt", 3)) {
char *p;
int len;
special += 3;
special += strspn(special, " \t");
p = nasm_strndup(special, len = strcspn(special, ":"));
obj_ext_set_defwrt (ext, p);
special += len;
if (*special && *special != ':')
error(ERR_NONFATAL, "`:' expected in special symbol"
" text for `%s'", ext->name);
else if (*special == ':')
special++;
}
/*
* The NEAR or FAR keywords specify nearness or
* farness. FAR gives default element size 1.
*/
if (!nasm_strnicmp(special, "far", 3)) {
if (ext->commonsize)
ext->commonelem = 1;
else
error(ERR_NONFATAL, "`%s': `far' keyword may only be applied"
" to common variables\n", ext->name);
special += 3;
special += strspn(special, " \t");
} else if (!nasm_strnicmp(special, "near", 4)) {
if (ext->commonsize)
ext->commonelem = 0;
else
error(ERR_NONFATAL, "`%s': `far' keyword may only be applied"
" to common variables\n", ext->name);
special += 4;
special += strspn(special, " \t");
}
/*
* If it's a common, and anything else remains on the line
* before a further colon, evaluate it as an expression and
* use that as the element size. Forward references aren't
* allowed.
*/
if (*special == ':')
special++;
else if (*special) {
if (ext->commonsize) {
expr *e;
struct tokenval tokval;
stdscan_reset();
stdscan_bufptr = special;
tokval.t_type = TOKEN_INVALID;
e = evaluate(stdscan, NULL, &tokval, NULL, 1, error, NULL);
if (e) {
if (!is_simple(e))
error (ERR_NONFATAL, "cannot use relocatable"
" expression as common-variable element size");
else
ext->commonelem = reloc_value(e);
}
special = stdscan_bufptr;
} else {
error (ERR_NONFATAL, "`%s': element-size specifications only"
" apply to common variables", ext->name);
while (*special && *special != ':')
special++;
if (*special == ':')
special++;
}
}
}
i = segment/2;
eb = ebhead;
if (!eb) {
eb = *ebtail = nasm_malloc(sizeof(*eb));
eb->next = NULL;
ebtail = &eb->next;
}
while (i > EXT_BLKSIZ) {
if (eb && eb->next)
eb = eb->next;
else {
eb = *ebtail = nasm_malloc(sizeof(*eb));
eb->next = NULL;
ebtail = &eb->next;
}
i -= EXT_BLKSIZ;
}
eb->exts[i] = ext;
ext->index = ++externals;
if (special && !used_special)
error(ERR_NONFATAL, "OBJ supports no special symbol features"
" for this symbol type");
}
static void obj_out (long segto, void *data, unsigned long type,
long segment, long wrt)
{
long size, realtype;
unsigned char *ucdata;
long ldata;
struct Segment *seg;
ObjRecord *orp;
/*
* handle absolute-assembly (structure definitions)
*/
if (segto == NO_SEG) {
if ((type & OUT_TYPMASK) != OUT_RESERVE)
error (ERR_NONFATAL, "attempt to assemble code in [ABSOLUTE]"
" space");
return;
}
/*
* If `any_segs' is still FALSE, we must define a default
* segment.
*/
if (!any_segs) {
int tempint; /* ignored */
if (segto != obj_segment("__NASMDEFSEG", 2, &tempint))
error (ERR_PANIC, "strange segment conditions in OBJ driver");
}
/*
* Find the segment we are targetting.
*/
for (seg = seghead; seg; seg = seg->next)
if (seg->index == segto)
break;
if (!seg)
error (ERR_PANIC, "code directed to nonexistent segment?");
orp = seg->orp;
orp->parm[0] = seg->currentpos;
size = type & OUT_SIZMASK;
realtype = type & OUT_TYPMASK;
if (realtype == OUT_RAWDATA) {
ucdata = data;
while (size > 0) {
unsigned int len;
orp = obj_check(seg->orp, 1);
len = RECORD_MAX - orp->used;