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 void aout_cleanup(int debuginfo)
{
struct Reloc *r;
(void) debuginfo;
aout_pad_sections();
aout_fixup_relocs(&stext);
aout_fixup_relocs(&sdata);
aout_write();
fclose (aoutfp);
saa_free (stext.data);
while (stext.head) {
r = stext.head;
stext.head = stext.head->next;
nasm_free (r);
}
saa_free (sdata.data);
while (sdata.head) {
r = sdata.head;
sdata.head = sdata.head->next;
nasm_free (r);
}
saa_free (syms);
raa_free (bsym);
saa_free (strs);
}
static void elf_cleanup(int debuginfo)
{
struct Reloc *r;
int i;
(void)debuginfo;
elf_write();
fclose(elffp);
for (i = 0; i < nsects; i++) {
if (sects[i]->type != SHT_NOBITS)
saa_free(sects[i]->data);
if (sects[i]->head)
saa_free(sects[i]->rel);
while (sects[i]->head) {
r = sects[i]->head;
sects[i]->head = sects[i]->head->next;
nasm_free(r);
}
}
nasm_free(sects);
saa_free(syms);
raa_free(bsym);
saa_free(strs);
if (of_elf.current_dfmt) {
of_elf.current_dfmt->cleanup();
}
}
void cleanup_labels (void)
{
int i;
initialised = FALSE;
for (i=0; i<LABEL_HASHES; i++) {
union label *lptr, *lhold;
lptr = lhold = ltab[i];
while (lptr) {
while (lptr->admin.movingon != END_BLOCK) lptr++;
lptr = lptr->admin.next;
nasm_free (lhold);
lhold = lptr;
}
}
while (perm_head) {
perm_tail = perm_head;
perm_head = perm_head->next;
nasm_free (perm_tail);
}
}
static char *nop_getline(void)
{
char *buffer, *p, *q;
int bufsize;
bufsize = BUF_DELTA;
buffer = nasm_malloc(BUF_DELTA);
src_set_linnum(src_get_linnum() + nop_lineinc);
while (1) { /* Loop to handle %line */
p = buffer;
while (1) { /* Loop to handle long lines */
q = fgets(p, bufsize - (p - buffer), nop_fp);
if (!q)
break;
p += strlen(p);
if (p > buffer && p[-1] == '\n')
break;
if (p - buffer > bufsize - 10) {
int offset;
offset = p - buffer;
bufsize += BUF_DELTA;
buffer = nasm_realloc(buffer, bufsize);
p = buffer + offset;
}
}
if (!q && p == buffer) {
nasm_free(buffer);
return NULL;
}
/*
* Play safe: remove CRs, LFs and any spurious ^Zs, if any of
* them are present at the end of the line.
*/
buffer[strcspn(buffer, "\r\n\032")] = '\0';
if (!nasm_strnicmp(buffer, "%line", 5)) {
int32_t ln;
int li;
char *nm = nasm_malloc(strlen(buffer));
if (sscanf(buffer + 5, "%"PRId32"+%d %s", &ln, &li, nm) == 3) {
nasm_free(src_set_fname(nm));
src_set_linnum(ln);
nop_lineinc = li;
continue;
}
nasm_free(nm);
}
break;
}
nop_list->line(LIST_READ, buffer);
return buffer;
}
static void dbg_cleanup(void)
{
dfmt->cleanup();
while (dbgsect) {
struct Section *tmp = dbgsect;
dbgsect = dbgsect->next;
nasm_free(tmp->name);
nasm_free(tmp);
}
}
static void dbg_cleanup(void)
{
while (dbgsect) {
struct Section *tmp = dbgsect;
dbgsect = dbgsect->next;
nasm_free (tmp->name);
nasm_free (tmp);
}
fclose(dbgf);
}
void saa_free(struct SAA *s)
{
char **p;
size_t n;
for (p = s->blk_ptrs, n = s->nblks; n; p++, n--)
nasm_free(*p);
nasm_free(s->blk_ptrs);
nasm_free(s);
}
static void dbg_cleanup(int debuginfo)
{
(void)debuginfo;
of_dbg.current_dfmt->cleanup();
while (dbgsect) {
struct Section *tmp = dbgsect;
dbgsect = dbgsect->next;
nasm_free(tmp->name);
nasm_free(tmp);
}
}
void cleanup_insn(insn * i)
{
extop *e;
while ((e = i->eops)) {
i->eops = e->next;
if (e->type == EOT_DB_STRING_FREE)
nasm_free(e->stringval);
nasm_free(e);
}
}
static void freenode(struct segtabnode *n)
{
if (!n)
return;
freenode(n->left);
freenode(n->right);
nasm_free(n);
}
void stabs_cleanup()
{
struct linelist *ptr, *del;
if (!stabslines)
return;
ptr = stabslines;
while (ptr) {
del = ptr;
ptr = ptr->next;
nasm_free(del);
}
if (stabbuf)
nasm_free(stabbuf);
if (stabrelbuf)
nasm_free(stabrelbuf);
if (stabstrbuf)
nasm_free(stabstrbuf);
}
void cleanup_insn (insn *i) {
extop *e;
while (i->eops) {
e = i->eops;
i->eops = i->eops->next;
nasm_free (e);
}
}
static void as86_cleanup(void)
{
struct Piece *p;
as86_write();
saa_free(stext.data);
while (stext.head) {
p = stext.head;
stext.head = stext.head->next;
nasm_free(p);
}
saa_free(sdata.data);
while (sdata.head) {
p = sdata.head;
sdata.head = sdata.head->next;
nasm_free(p);
}
saa_free(syms);
raa_free(bsym);
saa_free(strs);
}
void cleanup_labels(void)
{
union label *lptr, *lhold;
initialized = false;
hash_free(<ab);
lptr = lhold = ldata;
while (lptr) {
lptr = &lptr[LABEL_BLOCK-1];
lptr = lptr->admin.next;
nasm_free(lhold);
lhold = lptr;
}
while (perm_head) {
perm_tail = perm_head;
perm_head = perm_head->next;
nasm_free(perm_tail);
}
}
static void list_cleanup(void)
{
if (!listp)
return;
while (mistack) {
MacroInhibit *temp = mistack;
mistack = temp->next;
nasm_free(temp);
}
list_emit();
fclose(listfp);
}
static void dbgls_cleanup(void)
{
struct ieeeSection *segtmp;
while (fnhead) {
struct FileName *fntemp = fnhead;
fnhead = fnhead->next;
nasm_free(fntemp->name);
nasm_free(fntemp);
}
for (segtmp = seghead; segtmp; segtmp = segtmp->next) {
while (segtmp->lochead) {
struct ieeePublic *loctmp = segtmp->lochead;
segtmp->lochead = loctmp->next;
nasm_free(loctmp->name);
nasm_free(loctmp);
}
}
while (arrhead) {
struct Array *arrtmp = arrhead;
arrhead = arrhead->next;
nasm_free(arrtmp);
}
}
static void as86_cleanup(int debuginfo)
{
struct Piece *p;
(void) debuginfo;
as86_write();
fclose (as86fp);
saa_free (stext.data);
while (stext.head) {
p = stext.head;
stext.head = stext.head->next;
nasm_free (p);
}
saa_free (sdata.data);
while (sdata.head) {
p = sdata.head;
sdata.head = sdata.head->next;
nasm_free (p);
}
saa_free (syms);
raa_free (bsym);
saa_free (strs);
}
static void list_downlevel(int type)
{
if (!listp)
return;
if (type == LIST_INCBIN || type == LIST_TIMES) {
suppress &= ~(type == LIST_INCBIN ? 1 : 2);
return;
}
listlevel--;
while (mistack && mistack->level > listlevel) {
MacroInhibit *temp = mistack;
mistack = temp->next;
nasm_free(temp);
}
}
/*
* Internal routine: finds the `union label' corresponding to the
* given label name. Creates a new one, if it isn't found, and if
* `create' is true.
*/
static union label *find_label(const char *label, bool create, bool *created)
{
union label *lptr, **lpp;
char *label_str = NULL;
struct hash_insert ip;
nasm_assert(label != NULL);
if (islocal(label))
label = label_str = nasm_strcat(prevlabel, label);
lpp = (union label **) hash_find(<ab, label, &ip);
lptr = lpp ? *lpp : NULL;
if (lptr || !create) {
if (created)
*created = false;
return lptr;
}
/* Create a new label... */
if (lfree->admin.movingon == END_BLOCK) {
/*
* must allocate a new block
*/
lfree->admin.next = nasm_malloc(LBLK_SIZE);
lfree = lfree->admin.next;
init_block(lfree);
}
if (created)
*created = true;
nasm_zero(*lfree);
lfree->defn.label = perm_copy(label);
lfree->defn.subsection = NO_SEG;
if (label_str)
nasm_free(label_str);
hash_add(&ip, lfree->defn.label, lfree);
return lfree++;
}
/*
* Rundown
*/
static void ieee_cleanup(int debuginfo)
{
ieee_write_file(debuginfo);
of_ieee.current_dfmt->cleanup();
while (seghead) {
struct ieeeSection *segtmp = seghead;
seghead = seghead->next;
while (segtmp->pubhead) {
struct ieeePublic *pubtmp = segtmp->pubhead;
segtmp->pubhead = pubtmp->next;
nasm_free(pubtmp);
}
while (segtmp->fptr) {
struct ieeeFixupp *fixtmp = segtmp->fptr;
segtmp->fptr = fixtmp->next;
nasm_free(fixtmp);
}
while (segtmp->data) {
struct ieeeObjData *dattmp = segtmp->data;
segtmp->data = dattmp->next;
nasm_free(dattmp);
}
nasm_free(segtmp);
}
while (fpubhead) {
struct ieeePublic *pubtmp = fpubhead;
fpubhead = fpubhead->next;
nasm_free(pubtmp);
}
while (exthead) {
struct ieeeExternal *exttmp = exthead;
exthead = exthead->next;
nasm_free(exttmp);
}
while (ebhead) {
struct ExtBack *ebtmp = ebhead;
ebhead = ebhead->next;
nasm_free(ebtmp);
}
}
static void list_line(int type, char *line)
{
if (!listp)
return;
if (user_nolist)
return;
if (mistack && mistack->inhibiting) {
if (type == LIST_MACRO)
return;
else { /* pop the m i stack */
MacroInhibit *temp = mistack;
mistack = temp->next;
nasm_free(temp);
}
}
list_emit();
listlineno = src_get_linnum();
listlinep = true;
strncpy(listline, line, LIST_MAX_LEN - 1);
listline[LIST_MAX_LEN - 1] = '\0';
listlevel_e = listlevel;
}
static void elf_deflabel(char *name, long segment, long offset,
int is_global, char *special)
{
int pos = strslen;
struct Symbol *sym;
int special_used = FALSE;
#if defined(DEBUG) && DEBUG>2
fprintf(stderr,
" elf_deflabel: %s, seg=%ld, off=%ld, is_global=%d, %s\n",
name, segment, offset, is_global, special);
#endif
if (name[0] == '.' && name[1] == '.' && name[2] != '@') {
/*
* This is a NASM special symbol. We never allow it into
* the ELF symbol table, even if it's a valid one. If it
* _isn't_ a valid one, we should barf immediately.
*/
if (strcmp(name, "..gotpc") && strcmp(name, "..gotoff") &&
strcmp(name, "..got") && strcmp(name, "..plt") &&
strcmp(name, "..sym"))
error(ERR_NONFATAL, "unrecognised special symbol `%s'", name);
return;
}
if (is_global == 3) {
struct Symbol **s;
/*
* Fix up a forward-reference symbol size from the first
* pass.
*/
for (s = &fwds; *s; s = &(*s)->nextfwd)
if (!strcmp((*s)->name, name)) {
struct tokenval tokval;
expr *e;
char *p = special;
while (*p && !isspace(*p))
p++;
while (*p && isspace(*p))
p++;
stdscan_reset();
stdscan_bufptr = p;
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 symbol size");
else
(*s)->size = reloc_value(e);
}
/*
* Remove it from the list of unresolved sizes.
*/
nasm_free((*s)->name);
*s = (*s)->nextfwd;
return;
}
return; /* it wasn't an important one */
}
saa_wbytes(strs, name, (long)(1 + strlen(name)));
strslen += 1 + strlen(name);
sym = saa_wstruct(syms);
sym->strpos = pos;
sym->type = is_global ? SYM_GLOBAL : 0;
sym->size = 0;
if (segment == NO_SEG)
sym->section = SHN_ABS;
else {
int i;
sym->section = SHN_UNDEF;
if (nsects == 0 && segment == def_seg) {
int tempint;
if (segment != elf_section_names(".text", 2, &tempint))
error(ERR_PANIC,
"strange segment conditions in ELF driver");
sym->section = nsects;
} else {
for (i = 0; i < nsects; i++)
if (segment == sects[i]->index) {
sym->section = i + 1;
break;
}
}
}
if (is_global == 2) {
sym->size = offset;
sym->value = 0;
sym->section = SHN_COMMON;
/*
* We have a common variable. Check the special text to see
* if it's a valid number and power of two; if so, store it
* as the alignment for the common variable.
*/
if (special) {
int err;
sym->value = readnum(special, &err);
if (err)
error(ERR_NONFATAL, "alignment constraint `%s' is not a"
" valid number", special);
else if ((sym->value | (sym->value - 1)) != 2 * sym->value - 1)
error(ERR_NONFATAL, "alignment constraint `%s' is not a"
" power of two", special);
}
special_used = TRUE;
} else
sym->value = (sym->section == SHN_UNDEF ? 0 : offset);
if (sym->type == SYM_GLOBAL) {
/*
* There's a problem here that needs fixing.
* If sym->section == SHN_ABS, then the first line of the
* else section causes a core dump, because its a reference
* beyond the end of the section array.
* This behaviour is exhibited by this code:
* GLOBAL crash_nasm
* crash_nasm equ 0
*
* I'm not sure how to procede, because I haven't got the
* first clue about how ELF works, so I don't know what to
* do with it. Furthermore, I'm not sure what the rest of this
* section of code does. Help?
*
* For now, I'll see if doing absolutely nothing with it will
* work...
*/
if (sym->section == SHN_UNDEF || sym->section == SHN_COMMON) {
bsym = raa_write(bsym, segment, nglobs);
} else if (sym->section != SHN_ABS) {
/*
* This is a global symbol; so we must add it to the linked
* list of global symbols in its section. We'll push it on
* the beginning of the list, because it doesn't matter
* much which end we put it on and it's easier like this.
*
* In addition, we check the special text for symbol
* type and size information.
*/
sym->next = sects[sym->section - 1]->gsyms;
sects[sym->section - 1]->gsyms = sym;
if (special) {
int n = strcspn(special, " ");
if (!nasm_strnicmp(special, "function", n))
sym->type |= SYM_FUNCTION;
else if (!nasm_strnicmp(special, "data", n) ||
!nasm_strnicmp(special, "object", n))
sym->type |= SYM_DATA;
else
error(ERR_NONFATAL, "unrecognised symbol type `%.*s'",
n, special);
if (special[n]) {
struct tokenval tokval;
expr *e;
int fwd = FALSE;
char *saveme = stdscan_bufptr; /* bugfix? fbk 8/10/00 */
while (special[n] && isspace(special[n]))
n++;
/*
* We have a size expression; attempt to
* evaluate it.
*/
stdscan_reset();
stdscan_bufptr = special + n;
tokval.t_type = TOKEN_INVALID;
e = evaluate(stdscan, NULL, &tokval, &fwd, 0, error,
NULL);
if (fwd) {
sym->nextfwd = fwds;
fwds = sym;
sym->name = nasm_strdup(name);
} else if (e) {
if (!is_simple(e))
error(ERR_NONFATAL, "cannot use relocatable"
" expression as symbol size");
else
sym->size = reloc_value(e);
}
stdscan_bufptr = saveme; /* bugfix? fbk 8/10/00 */
}
special_used = TRUE;
}
}
sym->globnum = nglobs;
nglobs++;
} else
nlocals++;
if (special && !special_used)
error(ERR_NONFATAL, "no special symbol features supported here");
}
/*
* Unimportant cleanup is done to avoid confusing people who are trying
* to debug real memory leaks
*/
void stdscan_cleanup(void)
{
stdscan_reset();
nasm_free(stdscan_tempstorage);
}
static void stdscan_pop(void)
{
nasm_free(stdscan_tempstorage[--stdscan_templen]);
}
int rdl_searchlib(struct librarynode *lib, const char *label, rdffile * f)
{
char buf[512];
int i, t;
void *hdr;
rdfheaderrec *r;
int32_t l;
rdl_error = 0;
lib->referenced++;
if (!lib->fp) {
lib->fp = fopen(lib->name, "rb");
if (!lib->fp) {
rdl_error = 1;
return 0;
}
} else
rewind(lib->fp);
while (!feof(lib->fp)) {
/*
* read the module name from the file, and prepend
* the library name and '.' to it.
*/
strcpy(buf, lib->name);
i = strlen(lib->name);
buf[i++] = '.';
t = i;
while (fread(buf + i, 1, 1, lib->fp) == 1 && i < 512 && buf[i])
i++;
buf[i] = 0;
if (feof(lib->fp))
break;
if (!strcmp(buf + t, ".dir")) { /* skip over directory */
nasm_read(&l, 4, lib->fp);
fseek(lib->fp, l, SEEK_CUR);
continue;
}
/*
* open the RDOFF module
*/
if (rdfopenhere(f, lib->fp, &lib->referenced, buf)) {
rdl_error = 16 * rdf_errno;
return 0;
}
/*
* read in the header, and scan for exported symbols
*/
hdr = nasm_malloc(f->header_len);
rdfloadseg(f, RDOFF_HEADER, hdr);
while ((r = rdfgetheaderrec(f))) {
if (r->type != 3) /* not an export */
continue;
if (!strcmp(r->e.label, label)) { /* match! */
nasm_free(hdr); /* reset to 'just open' */
f->header_loc = NULL; /* state... */
f->header_fp = 0;
return 1;
}
}
/* find start of next module... */
i = f->eof_offset;
rdfclose(f);
fseek(lib->fp, i, SEEK_SET);
}
/*
* close the file if nobody else is using it
*/
lib->referenced--;
if (!lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return 0;
}
static void aout_deflabel (char *name, long segment, long offset,
int is_global, char *special)
{
int pos = strslen+4;
struct Symbol *sym;
int special_used = FALSE;
if (name[0] == '.' && name[1] == '.' && name[2] != '@') {
/*
* This is a NASM special symbol. We never allow it into
* the a.out symbol table, even if it's a valid one. If it
* _isn't_ a valid one, we should barf immediately.
*/
if (strcmp(name, "..gotpc") && strcmp(name, "..gotoff") &&
strcmp(name, "..got") && strcmp(name, "..plt") &&
strcmp(name, "..sym"))
error (ERR_NONFATAL, "unrecognised special symbol `%s'", name);
return;
}
if (is_global == 3) {
struct Symbol **s;
/*
* Fix up a forward-reference symbol size from the first
* pass.
*/
for (s = &fwds; *s; s = &(*s)->nextfwd)
if (!strcmp((*s)->name, name)) {
struct tokenval tokval;
expr *e;
char *p = special;
while (*p && !isspace(*p)) p++;
while (*p && isspace(*p)) p++;
stdscan_reset();
stdscan_bufptr = p;
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 symbol size");
else
(*s)->size = reloc_value(e);
}
/*
* Remove it from the list of unresolved sizes.
*/
nasm_free ((*s)->name);
*s = (*s)->nextfwd;
return;
}
return; /* it wasn't an important one */
}
saa_wbytes (strs, name, (long)(1+strlen(name)));
strslen += 1+strlen(name);
sym = saa_wstruct (syms);
sym->strpos = pos;
sym->type = is_global ? SYM_GLOBAL : 0;
sym->segment = segment;
if (segment == NO_SEG)
sym->type |= SECT_ABS;
else if (segment == stext.index) {
sym->type |= SECT_TEXT;
if (is_global) {
sym->next = stext.gsyms;
stext.gsyms = sym;
} else if (!stext.asym)
stext.asym = sym;
} else if (segment == sdata.index) {
sym->type |= SECT_DATA;
if (is_global) {
sym->next = sdata.gsyms;
sdata.gsyms = sym;
} else if (!sdata.asym)
sdata.asym = sym;
} else if (segment == sbss.index) {
sym->type |= SECT_BSS;
if (is_global) {
sym->next = sbss.gsyms;
sbss.gsyms = sym;
} else if (!sbss.asym)
sbss.asym = sym;
} else
sym->type = SYM_GLOBAL;
if (is_global == 2)
sym->value = offset;
else
sym->value = (sym->type == SYM_GLOBAL ? 0 : offset);
if (is_global && sym->type != SYM_GLOBAL) {
/*
* Global symbol exported _from_ this module. We must check
* the special text for type information.
*/
if (special) {
int n = strcspn(special, " ");
if (!nasm_strnicmp(special, "function", n))
sym->type |= SYM_FUNCTION;
else if (!nasm_strnicmp(special, "data", n) ||
!nasm_strnicmp(special, "object", n))
sym->type |= SYM_DATA;
else
error(ERR_NONFATAL, "unrecognised symbol type `%.*s'",
n, special);
if (special[n]) {
struct tokenval tokval;
expr *e;
int fwd = FALSE;
char *saveme=stdscan_bufptr; /* bugfix? fbk 8/10/00 */
if (!bsd) {
error(ERR_NONFATAL, "Linux a.out does not support"
" symbol size information");
} else {
while (special[n] && isspace(special[n]))
n++;
/*
* We have a size expression; attempt to
* evaluate it.
*/
sym->type |= SYM_WITH_SIZE;
stdscan_reset();
stdscan_bufptr = special+n;
tokval.t_type = TOKEN_INVALID;
e = evaluate(stdscan, NULL, &tokval, &fwd, 0, error, NULL);
if (fwd) {
sym->nextfwd = fwds;
fwds = sym;
sym->name = nasm_strdup(name);
} else if (e) {
if (!is_simple(e))
error (ERR_NONFATAL, "cannot use relocatable"
" expression as symbol size");
else
sym->size = reloc_value(e);
}
}
stdscan_bufptr=saveme; /* bugfix? fbk 8/10/00 */
}
special_used = TRUE;
}
}
/*
* define the references from external-symbol segment numbers
* to these symbol records.
*/
if (segment != NO_SEG && segment != stext.index &&
segment != sdata.index && segment != sbss.index)
bsym = raa_write (bsym, segment, nsyms);
sym->symnum = nsyms;
nsyms++;
if (sym->type & SYM_WITH_SIZE)
nsyms++; /* and another for the size */
if (special && !special_used)
error(ERR_NONFATAL, "no special symbol features supported here");
}
static void elf_write(void)
{
int nsections, align;
int scount;
char *p;
int commlen;
char comment[64];
int i;
struct SAA *symtab;
long symtablen, symtablocal;
/*
* Work out how many sections we will have. We have SHN_UNDEF,
* then the flexible user sections, then the four fixed
* sections `.comment', `.shstrtab', `.symtab' and `.strtab',
* then optionally relocation sections for the user sections.
*/
if (of_elf.current_dfmt == &df_stabs)
nsections = 8;
else
nsections = 5; /* SHN_UNDEF and the fixed ones */
add_sectname("", ".comment");
add_sectname("", ".shstrtab");
add_sectname("", ".symtab");
add_sectname("", ".strtab");
for (i = 0; i < nsects; i++) {
nsections++; /* for the section itself */
if (sects[i]->head) {
nsections++; /* for its relocations */
add_sectname(".rel", sects[i]->name);
}
}
if (of_elf.current_dfmt == &df_stabs) {
/* in case the debug information is wanted, just add these three sections... */
add_sectname("", ".stab");
add_sectname("", ".stabstr");
add_sectname(".rel", ".stab");
}
/*
* Do the comment.
*/
*comment = '\0';
commlen =
2 + sprintf(comment + 1, "The Netwide Assembler %s", NASM_VER);
/*
* Output the ELF header.
*/
fwrite("\177ELF\1\1\1\0\0\0\0\0\0\0\0\0", 16, 1, elffp);
fwriteshort(1, elffp); /* ET_REL relocatable file */
fwriteshort(3, elffp); /* EM_386 processor ID */
fwritelong(1L, elffp); /* EV_CURRENT file format version */
fwritelong(0L, elffp); /* no entry point */
fwritelong(0L, elffp); /* no program header table */
fwritelong(0x40L, elffp); /* section headers straight after
* ELF header plus alignment */
fwritelong(0L, elffp); /* 386 defines no special flags */
fwriteshort(0x34, elffp); /* size of ELF header */
fwriteshort(0, elffp); /* no program header table, again */
fwriteshort(0, elffp); /* still no program header table */
fwriteshort(0x28, elffp); /* size of section header */
fwriteshort(nsections, elffp); /* number of sections */
fwriteshort(nsects + 2, elffp); /* string table section index for
* section header table */
fwritelong(0L, elffp); /* align to 0x40 bytes */
fwritelong(0L, elffp);
fwritelong(0L, elffp);
/*
* Build the symbol table and relocation tables.
*/
symtab = elf_build_symtab(&symtablen, &symtablocal);
for (i = 0; i < nsects; i++)
if (sects[i]->head)
sects[i]->rel = elf_build_reltab(§s[i]->rellen,
sects[i]->head);
/*
* Now output the section header table.
*/
elf_foffs = 0x40 + 0x28 * nsections;
align = ((elf_foffs + SEG_ALIGN_1) & ~SEG_ALIGN_1) - elf_foffs;
elf_foffs += align;
elf_nsect = 0;
elf_sects = nasm_malloc(sizeof(*elf_sects) * (2 * nsects + 10));
elf_section_header(0, 0, 0, NULL, FALSE, 0L, 0, 0, 0, 0); /* SHN_UNDEF */
scount = 1; /* needed for the stabs debugging to track the symtable section */
p = shstrtab + 1;
for (i = 0; i < nsects; i++) {
elf_section_header(p - shstrtab, sects[i]->type, sects[i]->flags,
(sects[i]->type == SHT_PROGBITS ?
sects[i]->data : NULL), TRUE,
sects[i]->len, 0, 0, sects[i]->align, 0);
p += strlen(p) + 1;
scount++; /* dito */
}
elf_section_header(p - shstrtab, 1, 0, comment, FALSE, (long)commlen, 0, 0, 1, 0); /* .comment */
scount++; /* dito */
p += strlen(p) + 1;
elf_section_header(p - shstrtab, 3, 0, shstrtab, FALSE, (long)shstrtablen, 0, 0, 1, 0); /* .shstrtab */
scount++; /* dito */
p += strlen(p) + 1;
elf_section_header(p - shstrtab, 2, 0, symtab, TRUE, symtablen, nsects + 4, symtablocal, 4, 16); /* .symtab */
symtabsection = scount; /* now we got the symtab section index in the ELF file */
p += strlen(p) + 1;
elf_section_header(p - shstrtab, 3, 0, strs, TRUE, strslen, 0, 0, 1, 0); /* .strtab */
for (i = 0; i < nsects; i++)
if (sects[i]->head) {
p += strlen(p) + 1;
elf_section_header(p - shstrtab, 9, 0, sects[i]->rel, TRUE,
sects[i]->rellen, nsects + 3, i + 1, 4, 8);
}
if (of_elf.current_dfmt == &df_stabs) {
/* for debugging information, create the last three sections
which are the .stab , .stabstr and .rel.stab sections respectively */
/* this function call creates the stab sections in memory */
stabs_generate();
if ((stabbuf) && (stabstrbuf) && (stabrelbuf)) {
p += strlen(p) + 1;
elf_section_header(p - shstrtab, 1, 0, stabbuf, 0, stablen,
nsections - 2, 0, 4, 12);
p += strlen(p) + 1;
elf_section_header(p - shstrtab, 3, 0, stabstrbuf, 0,
stabstrlen, 0, 0, 4, 0);
p += strlen(p) + 1;
/* link -> symtable info -> section to refer to */
elf_section_header(p - shstrtab, 9, 0, stabrelbuf, 0,
stabrellen, symtabsection, nsections - 3, 4,
8);
}
}
fwrite(align_str, align, 1, elffp);
/*
* Now output the sections.
*/
elf_write_sections();
nasm_free(elf_sects);
saa_free(symtab);
}
static void freemembuf(memorybuffer *b)
{
if (!b) return;
freemembuf(b->next);
nasm_free(b);
}
void stabs_generate(void)
{
int i, numfiles, strsize, numstabs = 0, currfile, mainfileindex;
unsigned char *sbuf, *ssbuf, *rbuf, *sptr, *rptr;
char **allfiles;
int *fileidx;
struct linelist *ptr;
ptr = stabslines;
allfiles = (char **)nasm_malloc(numlinestabs * sizeof(char *));
for (i = 0; i < numlinestabs; i++)
allfiles[i] = 0;
numfiles = 0;
while (ptr) {
if (numfiles == 0) {
allfiles[0] = ptr->filename;
numfiles++;
} else {
for (i = 0; i < numfiles; i++) {
if (!strcmp(allfiles[i], ptr->filename))
break;
}
if (i >= numfiles) {
allfiles[i] = ptr->filename;
numfiles++;
}
}
ptr = ptr->next;
}
strsize = 1;
fileidx = (int *)nasm_malloc(numfiles * sizeof(int));
for (i = 0; i < numfiles; i++) {
fileidx[i] = strsize;
strsize += strlen(allfiles[i]) + 1;
}
mainfileindex = 0;
for (i = 0; i < numfiles; i++) {
if (!strcmp(allfiles[i], elf_module)) {
mainfileindex = i;
break;
}
}
/* worst case size of the stab buffer would be:
the sourcefiles changes each line, which would mean 1 SOL, 1 SYMLIN per line
*/
sbuf =
(unsigned char *)nasm_malloc((numlinestabs * 2 + 3) *
sizeof(struct stabentry));
ssbuf = (unsigned char *)nasm_malloc(strsize);
rbuf = (unsigned char *)nasm_malloc(numlinestabs * 8 * (2 + 3));
rptr = rbuf;
for (i = 0; i < numfiles; i++) {
strcpy((char *)ssbuf + fileidx[i], allfiles[i]);
}
ssbuf[0] = 0;
stabstrlen = strsize; /* set global variable for length of stab strings */
sptr = sbuf;
/* this is the first stab, its strx points to the filename of the
the source-file, the n_desc field should be set to the number
of remaining stabs
*/
WRITE_STAB(sptr, fileidx[0], 0, 0, 0, strlen(allfiles[0] + 12));
ptr = stabslines;
numstabs = 0;
if (ptr) {
/* this is the stab for the main source file */
WRITE_STAB(sptr, fileidx[mainfileindex], N_SO, 0, 0, 0);
/* relocation stuff */
/* IS THIS SANE? WHAT DOES SECTION+3 MEAN HERE? */
WRITELONG(rptr, (sptr - sbuf) - 4);
WRITELONG(rptr, ((ptr->info.section + 3) << 8) | R_386_32);
numstabs++;
currfile = mainfileindex;
}
while (ptr) {
if (strcmp(allfiles[currfile], ptr->filename)) {
/* oops file has changed... */
for (i = 0; i < numfiles; i++)
if (!strcmp(allfiles[i], ptr->filename))
break;
currfile = i;
WRITE_STAB(sptr, fileidx[currfile], N_SOL, 0, 0,
ptr->info.offset);
numstabs++;
/* relocation stuff */
/* IS THIS SANE? WHAT DOES SECTION+3 MEAN HERE? */
WRITELONG(rptr, (sptr - sbuf) - 4);
WRITELONG(rptr, ((ptr->info.section + 3) << 8) | R_386_32);
}
WRITE_STAB(sptr, 0, N_SLINE, 0, ptr->line, ptr->info.offset);
numstabs++;
/* relocation stuff */
/* IS THIS SANE? WHAT DOES SECTION+3 MEAN HERE? */
WRITELONG(rptr, (sptr - sbuf) - 4);
WRITELONG(rptr, ((ptr->info.section + 3) << 8) | R_386_32);
ptr = ptr->next;
}
((struct stabentry *)sbuf)->n_desc = numstabs;
nasm_free(allfiles);
nasm_free(fileidx);
stablen = (sptr - sbuf);
stabrellen = (rptr - rbuf);
stabrelbuf = rbuf;
stabbuf = sbuf;
stabstrbuf = ssbuf;
}