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nasm/output/outcoff.c
H. Peter Anvin bda7a6e371 ctype.h: wrapper ctype functions with a cast to (unsigned char) 
ctype functions take an *int*, which the user is expected to have
taken the input character from getc() and friends, or taken a
character and cast it to (unsigned char).

We don't care about EOF (-1), so use macros that cast to (unsigned
char) for us.
2008-06-21 10:23:17 -07:00

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/* outcoff.c output routines for the Netwide Assembler to produce
* COFF object files (for DJGPP and Win32)
*
* The Netwide Assembler is copyright (C) 1996 Simon Tatham and
* Julian Hall. All rights reserved. The software is
* redistributable under the license given in the file "LICENSE"
* distributed in the NASM archive.
*/
#include "compiler.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <inttypes.h>
#include "nasm.h"
#include "nasmlib.h"
#include "saa.h"
#include "raa.h"
#include "outform.h"
#if defined(OF_COFF) || defined(OF_WIN32) || defined(OF_WIN64)
/*
* Notes on COFF:
*
* (0) When I say `standard COFF' below, I mean `COFF as output and
* used by DJGPP'. I assume DJGPP gets it right.
*
* (1) Win32 appears to interpret the term `relative relocation'
* differently from standard COFF. Standard COFF understands a
* relative relocation to mean that during relocation you add the
* address of the symbol you're referencing, and subtract the base
* address of the section you're in. Win32 COFF, by contrast, seems
* to add the address of the symbol and then subtract the address
* of THE BYTE AFTER THE RELOCATED DWORD. Hence the two formats are
* subtly incompatible.
*
* (2) Win32 doesn't bother putting any flags in the header flags
* field (at offset 0x12 into the file).
*
* (3) Win32 uses some extra flags into the section header table:
* it defines flags 0x80000000 (writable), 0x40000000 (readable)
* and 0x20000000 (executable), and uses them in the expected
* combinations. It also defines 0x00100000 through 0x00700000 for
* section alignments of 1 through 64 bytes.
*
* (4) Both standard COFF and Win32 COFF seem to use the DWORD
* field directly after the section name in the section header
* table for something strange: they store what the address of the
* section start point _would_ be, if you laid all the sections end
* to end starting at zero. Dunno why. Microsoft's documentation
* lists this field as "Virtual Size of Section", which doesn't
* seem to fit at all. In fact, Win32 even includes non-linked
* sections such as .drectve in this calculation.
*
* Newer versions of MASM seem to have changed this to be zero, and
* that apparently matches the COFF spec, so go with that.
*
* (5) Standard COFF does something very strange to common
* variables: the relocation point for a common variable is as far
* _before_ the variable as its size stretches out _after_ it. So
* we must fix up common variable references. Win32 seems to be
* sensible on this one.
*/
/* Flag which version of COFF we are currently outputting. */
static bool win32, win64;
static int32_t imagebase_sect;
#define WRT_IMAGEBASE "..imagebase"
struct Reloc {
struct Reloc *next;
int32_t address; /* relative to _start_ of section */
int32_t symbol; /* symbol number */
enum {
SECT_SYMBOLS,
ABS_SYMBOL,
REAL_SYMBOLS
} symbase; /* relocation for symbol number :) */
int16_t type;
};
/* possible values for Reloc->type */
#define IMAGE_REL_AMD64_ADDR64 0x0001
#define IMAGE_REL_AMD64_ADDR32 0x0002
#define IMAGE_REL_AMD64_ADDR32NB 0x0003
#define IMAGE_REL_AMD64_REL32 0x0004
#define IMAGE_REL_I386_DIR32 0x0006
#define IMAGE_REL_I386_DIR32NB 0x0007
#define IMAGE_REL_I386_REL32 0x0014
struct Symbol {
char name[9];
int32_t strpos; /* string table position of name */
int32_t value; /* address, or COMMON variable size */
int section; /* section number where it's defined
* - in COFF codes, not NASM codes */
bool is_global; /* is it a global symbol or not? */
int16_t type; /* 0 - notype, 0x20 - function */
int32_t namlen; /* full name length */
};
static FILE *coffp;
static efunc error;
static char coff_infile[FILENAME_MAX];
struct Section {
struct SAA *data;
uint32_t len;
int nrelocs;
int32_t index;
struct Reloc *head, **tail;
uint32_t flags; /* section flags */
char name[9];
int32_t pos, relpos;
};
#define TEXT_FLAGS ((win32 | win64) ? 0x60500020L : 0x20L)
#define DATA_FLAGS ((win32 | win64) ? 0xC0300040L : 0x40L)
#define BSS_FLAGS ((win32 | win64) ? 0xC0300080L : 0x80L)
#define INFO_FLAGS 0x00100A00L
#define RDATA_FLAGS ((win32 | win64) ? 0x40400040L : 0x40L)
#define SECT_DELTA 32
static struct Section **sects;
static int nsects, sectlen;
static struct SAA *syms;
static uint32_t nsyms;
static int32_t def_seg;
static int initsym;
static struct RAA *bsym, *symval;
static struct SAA *strs;
static uint32_t strslen;
static void coff_gen_init(FILE *, efunc);
static void coff_sect_write(struct Section *, const uint8_t *,
uint32_t);
static void coff_write(void);
static void coff_section_header(char *, int32_t, int32_t, int32_t, int32_t, int, int32_t);
static void coff_write_relocs(struct Section *);
static void coff_write_symbols(void);
static void coff_win32_init(FILE * fp, efunc errfunc,
ldfunc ldef, evalfunc eval)
{
win32 = true; win64 = false;
(void)ldef; /* placate optimizers */
(void)eval;
coff_gen_init(fp, errfunc);
}
static void coff_win64_init(FILE * fp, efunc errfunc,
ldfunc ldef, evalfunc eval)
{
extern struct ofmt of_win64;
maxbits = 64;
win32 = false; win64 = true;
(void)ldef; /* placate optimizers */
(void)eval;
coff_gen_init(fp, errfunc);
imagebase_sect = seg_alloc()+1;
ldef(WRT_IMAGEBASE,imagebase_sect,0,NULL,false,false,&of_win64,errfunc);
}
static void coff_std_init(FILE * fp, efunc errfunc, ldfunc ldef,
evalfunc eval)
{
win32 = win64 = false;
(void)ldef; /* placate optimizers */
(void)eval;
coff_gen_init(fp, errfunc);
}
static void coff_gen_init(FILE * fp, efunc errfunc)
{
coffp = fp;
error = errfunc;
sects = NULL;
nsects = sectlen = 0;
syms = saa_init((int32_t)sizeof(struct Symbol));
nsyms = 0;
bsym = raa_init();
symval = raa_init();
strs = saa_init(1L);
strslen = 0;
def_seg = seg_alloc();
}
static void coff_cleanup(int debuginfo)
{
struct Reloc *r;
int i;
(void)debuginfo;
coff_write();
fclose(coffp);
for (i = 0; i < nsects; i++) {
if (sects[i]->data)
saa_free(sects[i]->data);
while (sects[i]->head) {
r = sects[i]->head;
sects[i]->head = sects[i]->head->next;
nasm_free(r);
}
nasm_free(sects[i]);
}
nasm_free(sects);
saa_free(syms);
raa_free(bsym);
raa_free(symval);
saa_free(strs);
}
static int coff_make_section(char *name, uint32_t flags)
{
struct Section *s;
s = nasm_malloc(sizeof(*s));
if (flags != BSS_FLAGS)
s->data = saa_init(1L);
else
s->data = NULL;
s->head = NULL;
s->tail = &s->head;
s->len = 0;
s->nrelocs = 0;
if (!strcmp(name, ".text"))
s->index = def_seg;
else
s->index = seg_alloc();
strncpy(s->name, name, 8);
s->name[8] = '\0';
s->flags = flags;
if (nsects >= sectlen)
sects =
nasm_realloc(sects, (sectlen += SECT_DELTA) * sizeof(*sects));
sects[nsects++] = s;
return nsects - 1;
}
static int32_t coff_section_names(char *name, int pass, int *bits)
{
char *p;
uint32_t flags, align_and = ~0L, align_or = 0L;
int i;
/*
* Set default bits.
*/
if (!name) {
if(win64)
*bits = 64;
else
*bits = 32;
}
if (!name)
return def_seg;
p = name;
while (*p && !nasm_isspace(*p))
p++;
if (*p)
*p++ = '\0';
if (strlen(name) > 8) {
error(ERR_WARNING, "COFF section names limited to 8 characters:"
" truncating");
name[8] = '\0';
}
flags = 0;
while (*p && nasm_isspace(*p))
p++;
while (*p) {
char *q = p;
while (*p && !nasm_isspace(*p))
p++;
if (*p)
*p++ = '\0';
while (*p && nasm_isspace(*p))
p++;
if (!nasm_stricmp(q, "code") || !nasm_stricmp(q, "text")) {
flags = TEXT_FLAGS;
} else if (!nasm_stricmp(q, "data")) {
flags = DATA_FLAGS;
} else if (!nasm_stricmp(q, "rdata")) {
if (win32 | win64)
flags = RDATA_FLAGS;
else {
flags = DATA_FLAGS; /* gotta do something */
error(ERR_NONFATAL, "standard COFF does not support"
" read-only data sections");
}
} else if (!nasm_stricmp(q, "bss")) {
flags = BSS_FLAGS;
} else if (!nasm_stricmp(q, "info")) {
if (win32 | win64)
flags = INFO_FLAGS;
else {
flags = DATA_FLAGS; /* gotta do something */
error(ERR_NONFATAL, "standard COFF does not support"
" informational sections");
}
} else if (!nasm_strnicmp(q, "align=", 6)) {
if (!(win32 | win64))
error(ERR_NONFATAL, "standard COFF does not support"
" section alignment specification");
else {
if (q[6 + strspn(q + 6, "0123456789")])
error(ERR_NONFATAL,
"argument to `align' is not numeric");
else {
unsigned int align = atoi(q + 6);
if (!align || ((align - 1) & align))
error(ERR_NONFATAL, "argument to `align' is not a"
" power of two");
else if (align > 64)
error(ERR_NONFATAL, "Win32 cannot align sections"
" to better than 64-byte boundaries");
else {
align_and = ~0x00F00000L;
align_or = (align == 1 ? 0x00100000L :
align == 2 ? 0x00200000L :
align == 4 ? 0x00300000L :
align == 8 ? 0x00400000L :
align == 16 ? 0x00500000L :
align ==
32 ? 0x00600000L : 0x00700000L);
}
}
}
}
}
for (i = 0; i < nsects; i++)
if (!strcmp(name, sects[i]->name))
break;
if (i == nsects) {
if (!flags) {
if (!strcmp(name, ".data"))
flags = DATA_FLAGS;
else if (!strcmp(name, ".rdata"))
flags = RDATA_FLAGS;
else if (!strcmp(name, ".bss"))
flags = BSS_FLAGS;
else if (win64 && !strcmp(name, ".pdata"))
flags = 0x40300040; /* rdata align=4 */
else if (win64 && !strcmp(name, ".xdata"))
flags = 0x40400040; /* rdate align=8 */
else
flags = TEXT_FLAGS;
}
i = coff_make_section(name, flags);
if (flags)
sects[i]->flags = flags;
sects[i]->flags &= align_and;
sects[i]->flags |= align_or;
} else if (pass == 1) {
if (flags)
error(ERR_WARNING, "section attributes ignored on"
" redeclaration of section `%s'", name);
}
return sects[i]->index;
}
static void coff_deflabel(char *name, int32_t segment, int64_t offset,
int is_global, char *special)
{
int pos = strslen + 4;
struct Symbol *sym;
if (special)
error(ERR_NONFATAL, "binary format does not support any"
" special symbol types");
if (name[0] == '.' && name[1] == '.' && name[2] != '@') {
if (strcmp(name,WRT_IMAGEBASE))
error(ERR_NONFATAL, "unrecognized special symbol `%s'", name);
return;
}
if (strlen(name) > 8) {
saa_wbytes(strs, name, (int32_t)(1 + strlen(name)));
strslen += 1 + strlen(name);
} else
pos = -1;
sym = saa_wstruct(syms);
sym->strpos = pos;
sym->namlen = strlen(name);
if (pos == -1)
strcpy(sym->name, name);
sym->is_global = !!is_global;
if (segment == NO_SEG)
sym->section = -1; /* absolute symbol */
else {
int i;
sym->section = 0;
for (i = 0; i < nsects; i++)
if (segment == sects[i]->index) {
sym->section = i + 1;
break;
}
if (!sym->section)
sym->is_global = true;
}
if (is_global == 2)
sym->value = offset;
else
sym->value = (sym->section == 0 ? 0 : offset);
/*
* define the references from external-symbol segment numbers
* to these symbol records.
*/
if (sym->section == 0) {
bsym = raa_write(bsym, segment, nsyms);
}
if (segment != NO_SEG)
symval = raa_write(symval, segment, sym->section ? 0 : sym->value);
nsyms++;
}
static int32_t coff_add_reloc(struct Section *sect, int32_t segment,
int16_t type)
{
struct Reloc *r;
r = *sect->tail = nasm_malloc(sizeof(struct Reloc));
sect->tail = &r->next;
r->next = NULL;
r->address = sect->len;
if (segment == NO_SEG)
r->symbol = 0, r->symbase = ABS_SYMBOL;
else {
int i;
r->symbase = REAL_SYMBOLS;
for (i = 0; i < nsects; i++)
if (segment == sects[i]->index) {
r->symbol = i * 2;
r->symbase = SECT_SYMBOLS;
break;
}
if (r->symbase == REAL_SYMBOLS)
r->symbol = raa_read(bsym, segment);
}
r->type = type;
sect->nrelocs++;
/*
* Return the fixup for standard COFF common variables.
*/
if (r->symbase == REAL_SYMBOLS && !(win32 | win64))
return raa_read(symval, segment);
else
return 0;
}
static void coff_out(int32_t segto, const void *data,
enum out_type type, uint64_t size,
int32_t segment, int32_t wrt)
{
struct Section *s;
uint8_t mydata[8], *p;
int i;
if (wrt != NO_SEG && !win64) {
wrt = NO_SEG; /* continue to do _something_ */
error(ERR_NONFATAL, "WRT not supported by COFF output formats");
}
/*
* handle absolute-assembly (structure definitions)
*/
if (segto == NO_SEG) {
if (type != OUT_RESERVE)
error(ERR_NONFATAL, "attempt to assemble code in [ABSOLUTE]"
" space");
return;
}
s = NULL;
for (i = 0; i < nsects; i++)
if (segto == sects[i]->index) {
s = sects[i];
break;
}
if (!s) {
int tempint; /* ignored */
if (segto != coff_section_names(".text", 2, &tempint))
error(ERR_PANIC, "strange segment conditions in COFF driver");
else
s = sects[nsects - 1];
}
/* magically default to 'wrt ..imagebase' in .pdata and .xdata */
if (win64 && wrt == NO_SEG &&
(!strcmp(s->name,".pdata") || !strcmp(s->name,".xdata")))
wrt = imagebase_sect;
if (!s->data && type != OUT_RESERVE) {
error(ERR_WARNING, "attempt to initialize memory in"
" BSS section `%s': ignored", s->name);
if (type == OUT_REL2ADR)
size = 2;
else if (type == OUT_REL4ADR)
size = 4;
s->len += size;
return;
}
if (type == OUT_RESERVE) {
if (s->data) {
error(ERR_WARNING, "uninitialised space declared in"
" non-BSS section `%s': zeroing", s->name);
coff_sect_write(s, NULL, size);
} else
s->len += size;
} else if (type == OUT_RAWDATA) {
if (segment != NO_SEG)
error(ERR_PANIC, "OUT_RAWDATA with other than NO_SEG");
coff_sect_write(s, data, size);
} else if (type == OUT_ADDRESS) {
if (!(win64)) {
if (size != 4 && (segment != NO_SEG || wrt != NO_SEG))
error(ERR_NONFATAL, "COFF format does not support non-32-bit"
" relocations");
else {
int32_t fix = 0;
if (segment != NO_SEG || wrt != NO_SEG) {
if (wrt != NO_SEG) {
error(ERR_NONFATAL, "COFF format does not support"
" WRT types");
} else if (segment % 2) {
error(ERR_NONFATAL, "COFF format does not support"
" segment base references");
} else
fix = coff_add_reloc(s, segment, IMAGE_REL_I386_DIR32);
}
p = mydata;
WRITELONG(p, *(int64_t *)data + fix);
coff_sect_write(s, mydata, size);
}
} else {
int32_t fix = 0;
p = mydata;
if (size == 8) {
if (wrt == imagebase_sect) {
error(ERR_NONFATAL, "operand size mismatch: 'wrt "
WRT_IMAGEBASE "' is a 32-bit operand");
}
fix = coff_add_reloc(s, segment, IMAGE_REL_AMD64_ADDR64);
WRITEDLONG(p, *(int64_t *)data + fix);
coff_sect_write(s, mydata, size);
} else {
fix = coff_add_reloc(s, segment,
wrt == imagebase_sect ? IMAGE_REL_AMD64_ADDR32NB:
IMAGE_REL_AMD64_ADDR32);
WRITELONG(p, *(int64_t *)data + fix);
coff_sect_write(s, mydata, size);
}
}
} else if (type == OUT_REL2ADR) {
error(ERR_NONFATAL, "COFF format does not support 16-bit"
" relocations");
} else if (type == OUT_REL4ADR) {
if (segment == segto && !(win64)) /* Acceptable for RIP-relative */
error(ERR_PANIC, "intra-segment OUT_REL4ADR");
else if (segment == NO_SEG && win32)
error(ERR_NONFATAL, "Win32 COFF does not correctly support"
" relative references to absolute addresses");
else {
int32_t fix = 0;
if (segment != NO_SEG && segment % 2) {
error(ERR_NONFATAL, "COFF format does not support"
" segment base references");
} else
fix = coff_add_reloc(s, segment,
win64 ? IMAGE_REL_AMD64_REL32 : IMAGE_REL_I386_REL32);
p = mydata;
if (win32 | win64) {
WRITELONG(p, *(int64_t *)data + 4 - size + fix);
} else {
WRITELONG(p, *(int64_t *)data - (size + s->len) + fix);
}
coff_sect_write(s, mydata, 4L);
}
}
}
static void coff_sect_write(struct Section *sect,
const uint8_t *data, uint32_t len)
{
saa_wbytes(sect->data, data, len);
sect->len += len;
}
typedef struct tagString {
struct tagString *Next;
int len;
char *String;
} STRING;
#define EXPORT_SECTION_NAME ".drectve"
#define EXPORT_SECTION_FLAGS INFO_FLAGS
/*
#define EXPORT_SECTION_NAME ".text"
#define EXPORT_SECTION_FLAGS TEXT_FLAGS
*/
static STRING *Exports = NULL;
static struct Section *directive_sec;
void AddExport(char *name)
{
STRING *rvp = Exports, *newS;
newS = (STRING *) nasm_malloc(sizeof(STRING));
newS->len = strlen(name);
newS->Next = NULL;
newS->String = (char *)nasm_malloc(newS->len + 1);
strcpy(newS->String, name);
if (rvp == NULL) {
int i;
for (i = 0; i < nsects; i++)
if (!strcmp(EXPORT_SECTION_NAME, sects[i]->name))
break;
if (i == nsects)
directive_sec =
sects[coff_make_section
(EXPORT_SECTION_NAME, EXPORT_SECTION_FLAGS)];
else
directive_sec = sects[i];
Exports = newS;
} else {
while (rvp->Next) {
if (!strcmp(rvp->String, name))
return;
rvp = rvp->Next;
}
rvp->Next = newS;
}
}
void BuildExportTable(void)
{
STRING *rvp = Exports, *next;
uint8_t buf[256];
int len;
if (rvp == NULL)
return;
while (rvp) {
len = sprintf((char *)buf, "-export:%s ", rvp->String);
coff_sect_write(directive_sec, buf, len);
rvp = rvp->Next;
}
next = Exports;
while ((rvp = next)) {
next = rvp->Next;
nasm_free(rvp->String);
nasm_free(rvp);
}
Exports = NULL;
}
static int coff_directives(char *directive, char *value, int pass)
{
if (!strcmp(directive, "export")) {
char *q, *name;
if (pass == 2)
return 1; /* ignore in pass two */
name = q = value;
while (*q && !nasm_isspace(*q))
q++;
if (nasm_isspace(*q)) {
*q++ = '\0';
while (*q && nasm_isspace(*q))
q++;
}
if (!*name) {
error(ERR_NONFATAL, "`export' directive requires export name");
return 1;
}
if (*q) {
error(ERR_NONFATAL, "unrecognized export qualifier `%s'", q);
return 1;
}
AddExport(name);
return 1;
} else if (win32 && !strcmp(directive,"safeseh")) {
static int sxseg=-1;
int i;
if (sxseg==-1)
{ for (i = 0; i < nsects; i++)
if (!strcmp(".sxdata",sects[i]->name))
break;
if (i == nsects)
sxseg = coff_make_section(".sxdata",0x200);
else
sxseg = i;
}
if (pass==2) {
uint32_t n;
saa_rewind(syms);
for (n = 0; n < nsyms; n++) {
struct Symbol *sym = saa_rstruct(syms);
bool equals;
/* sym->strpos is biased by 4, because symbol
* table is prefixed with table length */
if (sym->strpos >=4) {
char *name = nasm_malloc(sym->namlen+1);
saa_fread(strs,sym->strpos-4,name,sym->namlen);
name[sym->namlen]='\0';
equals = !strcmp(value,name);
nasm_free(name);
}
else
equals = !strcmp(value,sym->name);
if (equals) {
/* this value arithmetics effectively reflects
* initsym in coff_write(): 2 for file, 1 for
* .absolute and two per each section */
unsigned char value[4],*p=value;
WRITELONG(p,n + 2 + 1 + nsects*2);
coff_sect_write(sects[sxseg],value,4);
sym->type = 0x20;
break;
}
}
if (n == nsyms) {
error(ERR_NONFATAL,
"`safeseh' directive requires valid symbol");
}
}
return 1;
}
return 0;
}
static void coff_write(void)
{
int32_t pos, sympos, vsize;
int i;
BuildExportTable(); /* fill in the .drectve section with -export's */
if (win32) {
/* add default value for @feat.00, this allows to 'link /safeseh' */
uint32_t n;
saa_rewind(syms);
for (n = 0; n < nsyms; n++) {
struct Symbol *sym = saa_rstruct(syms);
if (sym->strpos == -1 && !strcmp("@feat.00",sym->name))
break;
}
if (n == nsyms)
coff_deflabel("@feat.00",NO_SEG,1,0,NULL);
}
/*
* Work out how big the file will get. Calculate the start of
* the `real' symbols at the same time.
*/
pos = 0x14 + 0x28 * nsects;
initsym = 3; /* two for the file, one absolute */
for (i = 0; i < nsects; i++) {
if (sects[i]->data) {
sects[i]->pos = pos;
pos += sects[i]->len;
sects[i]->relpos = pos;
pos += 10 * sects[i]->nrelocs;
} else
sects[i]->pos = sects[i]->relpos = 0L;
initsym += 2; /* two for each section */
}
sympos = pos;
/*
* Output the COFF header.
*/
if (win64)
fwriteint16_t(0x8664, coffp); /* MACHINE_x86-64 */
else
fwriteint16_t(0x014C, coffp); /* MACHINE_i386 */
fwriteint16_t(nsects, coffp); /* number of sections */
fwriteint32_t(time(NULL), coffp); /* time stamp */
fwriteint32_t(sympos, coffp);
fwriteint32_t(nsyms + initsym, coffp);
fwriteint16_t(0, coffp); /* no optional header */
/* Flags: 32-bit, no line numbers. Win32 doesn't even bother with them. */
fwriteint16_t((win32 | win64) ? 0 : 0x104, coffp);
/*
* Output the section headers.
*/
vsize = 0L;
for (i = 0; i < nsects; i++) {
coff_section_header(sects[i]->name, vsize, sects[i]->len,
sects[i]->pos, sects[i]->relpos,
sects[i]->nrelocs, sects[i]->flags);
vsize += sects[i]->len;
}
/*
* Output the sections and their relocations.
*/
for (i = 0; i < nsects; i++)
if (sects[i]->data) {
saa_fpwrite(sects[i]->data, coffp);
coff_write_relocs(sects[i]);
}
/*
* Output the symbol and string tables.
*/
coff_write_symbols();
fwriteint32_t(strslen + 4, coffp); /* length includes length count */
saa_fpwrite(strs, coffp);
}
static void coff_section_header(char *name, int32_t vsize,
int32_t datalen, int32_t datapos,
int32_t relpos, int nrelocs, int32_t flags)
{
char padname[8];
(void)vsize;
memset(padname, 0, 8);
strncpy(padname, name, 8);
fwrite(padname, 8, 1, coffp);
fwriteint32_t(0, coffp); /* Virtual size field - set to 0 or vsize */
fwriteint32_t(0L, coffp); /* RVA/offset - we ignore */
fwriteint32_t(datalen, coffp);
fwriteint32_t(datapos, coffp);
fwriteint32_t(relpos, coffp);
fwriteint32_t(0L, coffp); /* no line numbers - we don't do 'em */
fwriteint16_t(nrelocs, coffp);
fwriteint16_t(0, coffp); /* again, no line numbers */
fwriteint32_t(flags, coffp);
}
static void coff_write_relocs(struct Section *s)
{
struct Reloc *r;
for (r = s->head; r; r = r->next) {
fwriteint32_t(r->address, coffp);
fwriteint32_t(r->symbol + (r->symbase == REAL_SYMBOLS ? initsym :
r->symbase == ABS_SYMBOL ? initsym - 1 :
r->symbase == SECT_SYMBOLS ? 2 : 0),
coffp);
fwriteint16_t(r->type, coffp);
}
}
static void coff_symbol(char *name, int32_t strpos, int32_t value,
int section, int type, int storageclass, int aux)
{
char padname[8];
if (name) {
memset(padname, 0, 8);
strncpy(padname, name, 8);
fwrite(padname, 8, 1, coffp);
} else {
fwriteint32_t(0L, coffp);
fwriteint32_t(strpos, coffp);
}
fwriteint32_t(value, coffp);
fwriteint16_t(section, coffp);
fwriteint16_t(type, coffp);
fputc(storageclass, coffp);
fputc(aux, coffp);
}
static void coff_write_symbols(void)
{
char filename[18];
uint32_t i;
/*
* The `.file' record, and the file name auxiliary record.
*/
coff_symbol(".file", 0L, 0L, -2, 0, 0x67, 1);
memset(filename, 0, 18);
strncpy(filename, coff_infile, 18);
fwrite(filename, 18, 1, coffp);
/*
* The section records, with their auxiliaries.
*/
memset(filename, 0, 18); /* useful zeroed buffer */
for (i = 0; i < (uint32_t) nsects; i++) {
coff_symbol(sects[i]->name, 0L, 0L, i + 1, 0, 3, 1);
fwriteint32_t(sects[i]->len, coffp);
fwriteint16_t(sects[i]->nrelocs, coffp);
fwrite(filename, 12, 1, coffp);
}
/*
* The absolute symbol, for relative-to-absolute relocations.
*/
coff_symbol(".absolut", 0L, 0L, -1, 0, 3, 0);
/*
* The real symbols.
*/
saa_rewind(syms);
for (i = 0; i < nsyms; i++) {
struct Symbol *sym = saa_rstruct(syms);
coff_symbol(sym->strpos == -1 ? sym->name : NULL,
sym->strpos, sym->value, sym->section,
sym->type, sym->is_global ? 2 : 3, 0);
}
}
static int32_t coff_segbase(int32_t segment)
{
return segment;
}
static void coff_std_filename(char *inname, char *outname, efunc error)
{
strcpy(coff_infile, inname);
standard_extension(inname, outname, ".o", error);
}
static void coff_win32_filename(char *inname, char *outname, efunc error)
{
strcpy(coff_infile, inname);
standard_extension(inname, outname, ".obj", error);
}
extern macros_t coff_stdmac[];
static int coff_set_info(enum geninfo type, char **val)
{
(void)type;
(void)val;
return 0;
}
#endif /* defined(OF_COFF) || defined(OF_WIN32) */
#ifdef OF_COFF
struct ofmt of_coff = {
"COFF (i386) object files (e.g. DJGPP for DOS)",
"coff",
NULL,
null_debug_arr,
&null_debug_form,
coff_stdmac,
coff_std_init,
coff_set_info,
coff_out,
coff_deflabel,
coff_section_names,
coff_segbase,
coff_directives,
coff_std_filename,
coff_cleanup
};
#endif
#ifdef OF_WIN32
struct ofmt of_win32 = {
"Microsoft Win32 (i386) object files",
"win32",
NULL,
null_debug_arr,
&null_debug_form,
coff_stdmac,
coff_win32_init,
coff_set_info,
coff_out,
coff_deflabel,
coff_section_names,
coff_segbase,
coff_directives,
coff_win32_filename,
coff_cleanup
};
#endif
#ifdef OF_WIN64
struct ofmt of_win64 = {
"Microsoft Win64 (x86-64) object files",
"win64",
NULL,
null_debug_arr,
&null_debug_form,
coff_stdmac,
coff_win64_init,
coff_set_info,
coff_out,
coff_deflabel,
coff_section_names,
coff_segbase,
coff_directives,
coff_win32_filename,
coff_cleanup
};
#endif
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