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output_hunk.c
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/* output_hunk.c AmigaOS hunk format output driver for vasm */
/* (c) in 2002-2022 by Frank Wille */
#include "vasm.h"
#include "osdep.h"
#include "output_hunk.h"
#if defined(OUTHUNK) && (defined(VASM_CPU_M68K) || defined(VASM_CPU_PPC))
static char *copyright="vasm hunk format output module 2.14c (c) 2002-2022 Frank Wille";
int hunk_onlyglobal;
static uint32_t sec_cnt;
static symbol **secsyms;
/* options */
static int databss;
static int kick1;
static int exthunk;
static int genlinedebug;
static int keep_empty_sects;
/* (currently two-byte only) padding value for not 32-bit aligned code hunks */
#ifdef VASM_CPU_M68K
static uint16_t hunk_pad = 0x4e71;
#else
static uint16_t hunk_pad = 0;
#endif
static uint32_t strlen32(char *s)
/* calculate number of 32 bit words required for
a string without terminator */
{
return (strlen(s) + 3) >> 2;
}
static void fwname(FILE *f,char *name)
{
size_t n = strlen(name);
fwdata(f,name,n);
fwalign(f,n,4);
}
static void fwmemflags(FILE *f,section *s,uint32_t data)
/* write memory attributes with data (section size or type) */
{
uint32_t mem = s->memattr;
if ((mem & ~MEMF_PUBLIC) == 0) {
fw32(f,data,1);
}
else if ((mem & ~MEMF_PUBLIC) == MEMF_CHIP) {
fw32(f,HUNKF_CHIP|data,1);
}
else if ((mem & ~MEMF_PUBLIC) == MEMF_FAST) {
fw32(f,HUNKF_FAST|data,1);
}
else {
fw32(f,HUNKF_MEMTYPE|data,1);
fw32(f,mem,1);
}
}
static void fwnopalign(FILE *f,taddr n)
/* align a 68k code section with NOP instructions */
{
taddr i;
n = balign(n,4);
if (n & 1)
ierror(0);
for (i=0; i<n; i+=2)
fw16(f,hunk_pad,1);
}
static section *dummy_section(void)
{
return new_section(defsectname,defsecttype,8);
}
static uint32_t scan_attr(section *sec)
/* extract hunk-type from section attributes */
{
uint32_t type = 0;
char *p = sec->attr;
if (*p != '\0') {
while (*p) {
switch (*p++) {
#if defined(VASM_CPU_PPC)
case 'c': type = HUNK_PPC_CODE; break;
#else
case 'c': type = HUNK_CODE; break;
#endif
case 'd': type = HUNK_DATA; break;
case 'u': type = HUNK_BSS; break;
}
}
}
else
type = HUNK_DATA;
return type;
}
static section *prepare_sections(section *first_sec,symbol *sym)
/* Remove empty sections.
Assign all symbol definitions to their respective section.
Make sure that every common-symbol is referenced, otherwise there
is no possibility to represent such a symbol in hunk format.
Additionally we have to guarantee that at least one section exists,
when there are any symbols.
Remember the total number of sections left in sec_cnt. */
{
section *sec,*first_nonbss;
symbol *nextsym;
utaddr pc;
rlist *rl;
atom *a;
if (inname==NULL && genlinedebug)
genlinedebug = 0; /* no line debug info when source is stdin */
for (sec_cnt=0,sec=first_sec,first_nonbss=NULL; sec!=NULL; sec=sec->next) {
/* ignore empty sections without symbols, unless -keepempty was given */
if (keep_empty_sects || get_sec_size(sec)!=0 || (sec->flags&HAS_SYMBOLS)) {
sec->idx = sec_cnt++;
}
else {
sec->flags |= SEC_DELETED;
continue;
}
/* determine first initialized section for common-symbol references */
if (first_nonbss==NULL && scan_attr(sec)!=HUNK_BSS)
first_nonbss = sec;
for (a=sec->first,pc=sec->org; a; a=a->next) {
pc = pcalign(a,pc);
if (a->type==DATA || a->type==SPACE) {
for (rl=a->type==DATA?a->content.db->relocs:a->content.sb->relocs;
rl; rl=rl->next) {
if (rl->type==REL_ABS || rl->type==REL_PC) {
/* flag all present common-symbol references from this section */
if (((nreloc *)rl->reloc)->size==32) {
symbol *s = ((nreloc *)rl->reloc)->sym;
if (s->flags & COMMON)
s->flags |= COMM_REFERENCED;
}
}
else if (rl->type==REL_NONE && !exec_out) {
/* warn about unsupported NONE-relocations and convert them into
8-bit ABS, hoping to find a non-destructive definition... */
nreloc *r = (nreloc *)rl->reloc;
if (pc < (utaddr)sec->pc) {
r->byteoffset = r->bitoffset = 0;
r->size = 8;
r->mask = DEFMASK;
r->addend = 0;
rl->type = REL_ABS;
output_error(16,r->sym->name); /* conversion warning */
}
else
output_error(17,r->sym->name); /* no space for conversion */
}
}
}
pc += atom_size(a,sec,pc);
}
}
/* Allocate symbol lists for all sections.
Get one more for a potential dummy section. */
secsyms = mycalloc((sec_cnt+1)*sizeof(symbol *));
/* Assign all valid symbol definitions to their section symbol list.
Check for missing common-symbol references. */
while (sym != NULL) {
nextsym = sym->next;
if (*sym->name != ' ') { /* internal symbols will be ignored */
if ((sym->flags & COMMON) && !(sym->flags & COMM_REFERENCED)) {
/* create a dummy reference for each unreferenced common symbol */
dblock *db = new_dblock();
nreloc *r = new_nreloc();
rlist *rl = mymalloc(sizeof(rlist));
db->size = 4;
db->data = mycalloc(db->size);
db->relocs = rl;
rl->next = NULL;
rl->type = REL_ABS;
rl->reloc = r;
r->size = 32;
r->sym = sym;
if (first_nonbss == NULL) {
first_nonbss = dummy_section();
if (first_sec == NULL)
first_sec = first_nonbss;
first_nonbss->idx = sec_cnt++;
}
add_atom(first_nonbss,new_data_atom(db,4));
}
else if (sym->flags & WEAK) {
/* weak symbols are not supported, make them global */
sym->flags &= ~WEAK;
sym->flags |= EXPORT;
output_error(10,sym->name);
}
if (sym->type==LABSYM ||
(sym->type==EXPRESSION && (sym->flags&EXPORT))) {
if (sym->type == EXPRESSION) {
/* put absolute globals symbols into the first section */
if (first_sec == NULL) {
first_sec = first_nonbss = dummy_section();
first_sec->idx = sec_cnt++;
}
first_sec->flags |= HAS_SYMBOLS;
sym->sec = first_sec;
}
/* assign symbols to the section they are defined in */
sym->next = secsyms[sym->sec->idx];
secsyms[sym->sec->idx] = sym;
}
}
sym = nextsym;
}
return first_sec;
}
static utaddr file_size(section *sec)
/* determine a section's initialized data size, which occupies space in
the executable file */
{
utaddr pc=0,zpc=0,npc;
atom *a;
for (a=sec->first; a; a=a->next) {
int zerodata = 1;
unsigned char *d;
npc = pcalign(a,pc);
if (a->type == DATA) {
/* do we have relocations or non-zero data in this atom? */
if (a->content.db->relocs) {
zerodata = 0;
}
else {
for (d=a->content.db->data;
d<a->content.db->data+a->content.db->size; d++) {
if (*d) {
zerodata = 0;
break;
}
}
}
}
else if (a->type == SPACE) {
/* do we have relocations or non-zero data in this atom? */
if (a->content.sb->relocs) {
zerodata = 0;
}
else {
for (d=a->content.sb->fill;
d<a->content.sb->fill+a->content.sb->size; d++) {
if (*d) {
zerodata = 0;
break;
}
}
}
}
pc = npc + atom_size(a,sec,npc);
if (!zerodata)
zpc = pc;
}
return zpc;
}
static utaddr sect_size(section *sec)
/* recalculate full section size, subtracted by the space explicitly
reserved for databss (DX directive) */
{
utaddr pc=0,dxpc=0;
atom *a;
for (a=sec->first; a; a=a->next) {
taddr sz;
pc = pcalign(a,pc);
sz = atom_size(a,sec,pc);
if (a->type == SPACE) {
sblock *sb = a->content.sb;
if (sb->flags & SPC_DATABSS) {
if (dxpc == 0)
dxpc = pc;
}
else if (sz > 0 && dxpc != 0) {
output_atom_error(13,a); /* warn about data following a DX directive */
dxpc = 0;
}
}
else if (a->type == DATA) {
if (dxpc != 0) {
output_atom_error(13,a); /* warn about data following a DX directive */
dxpc = 0;
}
}
else if (sz != 0 && dxpc != 0)
ierror(0); /* only DATA and SPACE can have a size!? */
pc += sz;
}
return dxpc ? dxpc : pc;
}
static struct hunkreloc *convert_reloc(rlist *rl,utaddr pc)
{
nreloc *r = (nreloc *)rl->reloc;
if (rl->type <= LAST_STANDARD_RELOC
#if defined(VASM_CPU_PPC)
|| rl->type==REL_PPCEABI_SDA2
#endif
) {
if (LOCREF(r->sym)) {
struct hunkreloc *hr;
uint32_t type;
uint32_t offs = pc + r->byteoffset;
switch (rl->type) {
case REL_ABS:
if (r->size!=32 || r->bitoffset!=0 || r->mask!=DEFMASK)
return NULL;
type = HUNK_ABSRELOC32;
break;
case REL_PC:
switch (r->size) {
case 8:
if (r->bitoffset!=0 || r->mask!=DEFMASK)
return NULL;
type = HUNK_RELRELOC8;
break;
#if defined(VASM_CPU_PPC)
case 14:
if (r->bitoffset!=0 || r->mask!=0xfffc)
return NULL;
type = HUNK_RELRELOC16;
break;
#endif
case 16:
if (r->bitoffset!=0 || r->mask!=DEFMASK)
return NULL;
type = HUNK_RELRELOC16;
break;
#if defined(VASM_CPU_PPC)
case 24:
if (r->bitoffset!=6 || r->mask!=0x3fffffc)
return NULL;
type = HUNK_RELRELOC26;
break;
#endif
case 32:
if (kick1 || r->bitoffset!=0 || r->mask!=DEFMASK)
return NULL;
type = HUNK_RELRELOC32;
break;
}
break;
#if defined(VASM_CPU_PPC)
case REL_PPCEABI_SDA2: /* treat as REL_SD for WarpOS/EHF */
#endif
case REL_SD:
if (r->size!=16 || r->bitoffset!=0 || r->mask!=DEFMASK)
return NULL;
type = HUNK_DREL16;
break;
default:
return NULL;
}
hr = mymalloc(sizeof(struct hunkreloc));
hr->rl = rl;
hr->hunk_id = type;
hr->hunk_offset = offs;
hr->hunk_index = r->sym->sec->idx;
return hr;
}
}
return NULL;
}
static struct hunkxref *convert_xref(rlist *rl,utaddr pc)
{
nreloc *r = (nreloc *)rl->reloc;
if (rl->type <= LAST_STANDARD_RELOC
#if defined(VASM_CPU_PPC)
|| rl->type==REL_PPCEABI_SDA2
#endif
) {
if (EXTREF(r->sym)) {
struct hunkxref *xref;
uint32_t type,size=0;
uint32_t offs = pc + r->byteoffset;
int com = (r->sym->flags & COMMON) != 0;
switch (rl->type) {
case REL_ABS:
if (r->bitoffset!=0 || r->mask!=DEFMASK || (com && r->size!=32))
return NULL;
switch (r->size) {
case 8:
type = kick1 ? EXT_RELREF8 : EXT_ABSREF8;
break;
case 16:
type = kick1 ? EXT_RELREF16 : EXT_ABSREF16;
break;
case 32:
if (com) {
type = EXT_ABSCOMMON;
size = get_sym_size(r->sym);
}
else
type = EXT_ABSREF32;
break;
}
break;
case REL_PC:
switch (r->size) {
case 8:
if (r->bitoffset!=0 || r->mask!=DEFMASK || com)
return NULL;
type = EXT_RELREF8;
break;
#if defined(VASM_CPU_PPC)
case 14:
if (r->bitoffset!=0 || r->mask!=0xfffc || com)
return NULL;
type = EXT_RELREF16;
break;
#endif
case 16:
if (r->bitoffset!=0 || r->mask!=DEFMASK || com)
return NULL;
type = EXT_RELREF16;
break;
#if defined(VASM_CPU_PPC)
case 24:
if (r->bitoffset!=6 || r->mask!=0x3fffffc || com)
return NULL;
type = EXT_RELREF26;
break;
#endif
case 32:
if (kick1 || r->bitoffset!=0 || r->mask!=DEFMASK)
return NULL;
if (com) {
type = EXT_RELCOMMON;
size = get_sym_size(r->sym);
}
else
type = EXT_RELREF32;
break;
}
break;
#if defined(VASM_CPU_PPC)
case REL_PPCEABI_SDA2: /* treat as REL_SD for WarpOS/EHF */
#endif
case REL_SD:
if (r->size!=16 || r->bitoffset!=0 || r->mask!=DEFMASK)
return NULL;
type = EXT_DEXT16;
break;
default:
return NULL;
}
xref = mymalloc(sizeof(struct hunkxref));
xref->name = r->sym->name;
xref->type = type;
xref->size = size;
xref->offset = offs;
return xref;
}
}
return NULL;
}
static void process_relocs(atom *a,struct list *reloclist,
struct list *xreflist,section *sec,utaddr pc)
/* convert an atom's rlist into relocations and xrefs */
{
rlist *rl;
if (a->type == DATA)
rl = a->content.db->relocs;
else if (a->type == SPACE)
rl = a->content.sb->relocs;
else
return;
if (rl == NULL)
return;
do {
struct hunkreloc *hr = convert_reloc(rl,pc);
if (hr!=NULL && (xreflist!=NULL || hr->hunk_id==HUNK_ABSRELOC32 ||
hr->hunk_id==HUNK_RELRELOC32)) {
addtail(reloclist,&hr->n); /* add new relocation */
}
else {
struct hunkxref *xref = convert_xref(rl,pc);
if (xref) {
if (xreflist)
addtail(xreflist,&xref->n); /* add new external reference */
else
output_atom_error(8,a,xref->name,sec->name,xref->offset,rl->type);
}
else
unsupp_reloc_error(rl); /* reloc not supported */
}
}
while (rl = rl->next);
}
static void reloc_hunk(FILE *f,uint32_t type,int shrt,struct list *reloclist)
/* write all section-offsets for one relocation type */
{
unsigned long bytes = 0;
uint32_t idx;
for (idx=0; idx<sec_cnt; idx++) {
struct list myreloclist;
struct hunkreloc *r,*next;
unsigned long cnt,n;
/* move appropriate relocs into the list for this hunk */
initlist(&myreloclist);
cnt = 0;
r = (struct hunkreloc *)reloclist->first;
while (next = (struct hunkreloc *)r->n.next) {
if (r->hunk_id==type && r->hunk_index==idx &&
(!shrt || r->hunk_offset < 0x10000)) {
remnode(&r->n);
addtail(&myreloclist,&r->n);
cnt++;
}
r = next;
}
if (cnt) {
/* output hunk-id, before the first reloc */
if (!bytes) {
if (shrt && type==HUNK_ABSRELOC32)
fw32(f,HUNK_DREL32,1); /* RELOC32SHORT is DREL32 for OS2.0 */
else
fw32(f,type,1);
bytes = 4;
}
if (shrt) {
/* output up to 65535 short relocs with unsigned 16-bit offsets */
while (n = cnt) {
if (n > 0xffff)
n = 0xffff; /* maximum entries for short relocs */
fw16(f,n,1); /* number of relocations */
fw16(f,idx,1); /* referenced section index */
cnt -= n;
while (n-- && (r=(struct hunkreloc *)remhead(&myreloclist))) {
fw16(f,r->hunk_offset,1);
bytes += 2;
myfree(r);
}
}
}
else {
/* output up to 65536 normal relocs with 32-bit offsets */
while (n = cnt) {
if (exec_out && n>0x10000)
n = 0x10000; /* limitation from AmigaDOS LoadSeg() */
fw32(f,n,1); /* number of relocations */
fw32(f,idx,1); /* referenced section index */
cnt -= n;
while (n-- && (r=(struct hunkreloc *)remhead(&myreloclist))) {
fw32(f,r->hunk_offset,1);
myfree(r);
}
}
}
}
}
if (bytes) {
/* no more relocation entries for this hunk - output terminating zero */
if (shrt) {
fw16(f,0,1);
fwalign(f,bytes+2,4);
}
else
fw32(f,0,1);
}
}
static void add_linedebug(struct list *ldblist,source *src,int line,
uint32_t off)
{
char pathbuf[MAXPATHLEN];
struct linedb_block *ldbblk;
struct linedb_entry *ldbent;
/* get full source path and fix line number for macros and repetitions */
if (src != NULL) {
/* Submitted by Soren Hannibal:
Use parent source/line when no source level debugging is allowed
for this source text instance. */
while (!src->srcdebug && src->parent!=NULL) {
line = src->parent_line;
src = src->parent;
}
if (src->defsrc != NULL) {
line += src->defline;
src = src->defsrc;
}
pathbuf[0] = '\0';
if (src->srcfile->incpath != NULL) {
if (src->srcfile->incpath->compdir_based)
strcpy(pathbuf,compile_dir);
strcat(pathbuf,src->srcfile->incpath->path);
}
strcat(pathbuf,src->srcfile->name);
}
else /* line numbers and source defined by directive */
strcpy(pathbuf,getdebugname());
/* make a new LINE debug block whenever the source path changes */
if (ldblist->first->next==NULL
|| filenamecmp(pathbuf,
((struct linedb_block *)ldblist->last)->filename)) {
ldbblk = mymalloc(sizeof(struct linedb_block));
ldbblk->filename = mystrdup(pathbuf);
ldbblk->offset = off;
ldbblk->entries = 0;
initlist(&ldbblk->lines);
addtail(ldblist,&ldbblk->n);
}
else
ldbblk = (struct linedb_block *)ldblist->last;
/* append line/offset pair as a new entry for the debug block */
ldbent = mymalloc(sizeof(struct linedb_entry));
ldbent->line = (uint32_t)line;
ldbent->offset = off - ldbblk->offset;
addtail(&ldbblk->lines,&ldbent->n);
ldbblk->entries++;
}
static void linedebug_hunk(FILE *f,struct list *ldblist)
{
struct linedb_block *ldbblk;
while (ldbblk = (struct linedb_block *)remhead(ldblist)) {
char abspathbuf[MAXPATHLEN];
struct linedb_entry *ldbent;
uint32_t abspathlen;
/* get source file name as full absolute path */
if (!abs_path(ldbblk->filename)) {
char *cwd = append_path_delimiter(get_workdir());
if (strlen(cwd) + strlen(ldbblk->filename) < MAXPATHLEN)
sprintf(abspathbuf,"%s%s",cwd,ldbblk->filename);
else
output_error(15,MAXPATHLEN); /* max path len exceeded */
myfree(cwd);
}
else
strcpy(abspathbuf,ldbblk->filename);
abspathlen = strlen32(abspathbuf);
/* write DEBUG-LINE hunk header */
fw32(f,HUNK_DEBUG,1);
fw32(f,abspathlen + ldbblk->entries*2 + 3,1);
fw32(f,ldbblk->offset,1);
fw32(f,0x4c494e45,1); /* "LINE" */
fw32(f,abspathlen,1);
fwname(f,abspathbuf);
/* writes and deallocate entries */
while (ldbent = (struct linedb_entry *)remhead(&ldbblk->lines)) {
fw32(f,ldbent->line,1);
fw32(f,ldbent->offset,1);
myfree(ldbent);
ldbblk->entries--;
}
/* deallocate debug block */
if (ldbblk->entries != 0)
ierror(0); /* shouldn't happen */
myfree(ldbblk);
}
}
static void extheader(FILE *f)
{
if (!exthunk) {
exthunk = 1;
fw32(f,HUNK_EXT,1);
}
}
static void exttrailer(FILE *f)
{
if (exthunk)
fw32(f,0,1);
}
static void ext_refs(FILE *f,struct list *xreflist)
/* write all external references from a section into a HUNK_EXT hunk */
{
while (xreflist->first->next) {
struct hunkxref *x,*next;
uint32_t n,type,size;
char *name;
extheader(f);
x = (struct hunkxref *)xreflist->first;
name = x->name;
type = x->type;
size = x->size;
for (n=0,x=(struct hunkxref *)xreflist->first;
x->n.next; x=(struct hunkxref *)x->n.next) {
if (!strcmp(x->name,name) && x->type==type)
n++;
}
fw32(f,(type<<24) | strlen32(name),1);
fwname(f,name);
if (type==EXT_ABSCOMMON || type==EXT_RELCOMMON)
fw32(f,size,1);
fw32(f,n,1);
x = (struct hunkxref *)xreflist->first;
while (next = (struct hunkxref *)x->n.next) {
if (!strcmp(x->name,name) && x->type==type) {
fw32(f,x->offset,1);
remnode(&x->n);
myfree(x);
}
x = next;
}
}
}
static void ext_defs(FILE *f,int symtype,int global,size_t idx,
uint32_t xtype)
{
int header = 0;
symbol *sym;
uint32_t len;
for (sym=secsyms[idx]; sym; sym=sym->next) {
if (sym->type==symtype && (sym->flags&global)==global) {
if (!header) {
header = 1;
if (xtype == EXT_SYMB)
fw32(f,HUNK_SYMBOL,1);
else
extheader(f);
}
len = strlen32(sym->name);
if (exec_out && len>31) {
/* LoadSeg() doesn't allow names with more than 31 longwords */
fw32(f,(xtype<<24)|31,1);
fwdata(f,sym->name,124);
}
else {
fw32(f,(xtype<<24)|len,1);
fwname(f,sym->name);
}
fw32(f,(uint32_t)get_sym_value(sym),1);
}
}
if (header && xtype==EXT_SYMB)
fw32(f,0,1);
}
static void report_bad_relocs(struct list *reloclist)
{
struct hunkreloc *r;
/* report all remaining relocs in the list as unsupported */
for (r=(struct hunkreloc *)reloclist->first; r->n.next;
r=(struct hunkreloc *)r->n.next)
unsupp_reloc_error(r->rl); /* reloc not supported */
}
static void write_object(FILE *f,section *sec,symbol *sym)
{
int wrotesec = 0;
sec = prepare_sections(sec,sym);
/* write header */
fw32(f,HUNK_UNIT,1);
fw32(f,strlen32(filename),1);
fwname(f,filename);
if (sec) {
for (; sec; sec=sec->next) {
if (!(sec->flags & SEC_DELETED)) {
uint32_t type;
atom *a;
struct list reloclist,xreflist,linedblist;
wrotesec = 1;
initlist(&reloclist);
initlist(&xreflist);
initlist(&linedblist);
/* section name */
if (strlen(sec->name)) {
fw32(f,HUNK_NAME,1);
fw32(f,strlen32(sec->name),1);
fwname(f,sec->name);
}
/* section type */
if (!(type = scan_attr(sec))) {
output_error(3,sec->attr); /* section attributes not supported */
type = HUNK_DATA; /* default */
}
fwmemflags(f,sec,type);
fw32(f,(get_sec_size(sec)+3)>>2,1); /* size */
if (type != HUNK_BSS) {
/* write contents */
utaddr pc=0,npc;
for (a=sec->first; a; a=a->next) {
npc = fwpcalign(f,a,sec,pc);
if (genlinedebug && (a->type==DATA || a->type==SPACE))
add_linedebug(&linedblist,a->src,a->line,npc);
if (a->type == DATA)
fwdata(f,a->content.db->data,a->content.db->size);
else if (a->type == SPACE)
fwsblock(f,a->content.sb);
else if (a->type == LINE && !genlinedebug)
add_linedebug(&linedblist,NULL,a->content.srcline,npc);
process_relocs(a,&reloclist,&xreflist,sec,npc);
pc = npc + atom_size(a,sec,npc);
}
if (type == HUNK_CODE && (pc&1) == 0)
fwnopalign(f,pc);
else
fwalign(f,pc,4);
}
/* relocation hunks */
reloc_hunk(f,HUNK_ABSRELOC32,0,&reloclist);
reloc_hunk(f,HUNK_RELRELOC8,0,&reloclist);
reloc_hunk(f,HUNK_RELRELOC16,0,&reloclist);
reloc_hunk(f,HUNK_RELRELOC26,0,&reloclist);
reloc_hunk(f,HUNK_RELRELOC32,0,&reloclist);
reloc_hunk(f,HUNK_DREL16,0,&reloclist);
report_bad_relocs(&reloclist);
/* external references and global definitions */
exthunk = 0;
ext_refs(f,&xreflist);
if (sec->idx == 0) /* absolute definitions into first hunk */
ext_defs(f,EXPRESSION,EXPORT,0,EXT_ABS);
ext_defs(f,LABSYM,EXPORT,sec->idx,EXT_DEF);
exttrailer(f);
if (!no_symbols) {
/* symbol table */
if (!hunk_onlyglobal)
ext_defs(f,LABSYM,0,sec->idx,EXT_SYMB);
/* line-debug */
linedebug_hunk(f,&linedblist);
}
fw32(f,HUNK_END,1);
}
}
}
if (!wrotesec) {
/* there was no section at all - dummy section size 0 */
#if defined(VASM_CPU_PPC)
fw32(f,HUNK_PPC_CODE,1);
#else
fw32(f,HUNK_CODE,1);
#endif
fw32(f,0,1);
fw32(f,HUNK_END,1);
}
}
static void write_exec(FILE *f,section *sec,symbol *sym)
{
section *s;
sec = prepare_sections(sec,sym);
/* write header */
fw32(f,HUNK_HEADER,1);
fw32(f,0,1);
if (sec_cnt) {
fw32(f,sec_cnt,1); /* number of sections - no overlay support */
fw32(f,0,1); /* first section index: 0 */
fw32(f,sec_cnt-1,1); /* last section index: sec_cnt - 1 */
/* write section sizes and memory flags */
for (s=sec; s; s=s->next) {
if (!(s->flags & SEC_DELETED))
fwmemflags(f,s,(get_sec_size(s)+3)>>2);
}
/* section hunk loop */
for (; sec; sec=sec->next) {
if (!(sec->flags & SEC_DELETED)) {
uint32_t type;
atom *a;
struct list reloclist,linedblist;
initlist(&reloclist);
initlist(&linedblist);
/* write hunk-type and size */
if (!(type = scan_attr(sec))) {
output_error(3,sec->attr); /* section attributes not supported */
type = HUNK_DATA; /* default */
}
fw32(f,type,1);
if (type != HUNK_BSS) {
/* write contents */
utaddr pc,npc,size;
size = databss ? file_size(sec) : sect_size(sec);
fw32(f,(size+3)>>2,1);
for (a=sec->first,pc=0; a!=NULL&&pc<size; a=a->next) {
npc = fwpcalign(f,a,sec,pc);
if (genlinedebug && (a->type==DATA || a->type==SPACE))
add_linedebug(&linedblist,a->src,a->line,npc);
if (a->type == DATA)
fwdata(f,a->content.db->data,a->content.db->size);
else if (a->type == SPACE)