void
ldpe(Biobuf *f, char *pkg, int64 len, char *pn)
{
char *name;
int32 base;
int i, j, l, numaux;
PeObj *obj;
PeSect *sect, *rsect;
IMAGE_SECTION_HEADER sh;
uchar symbuf[18];
Sym *s;
Reloc *r, *rp;
PeSym *sym;
USED(len);
USED(pkg);
if(debug['v'])
Bprint(&bso, "%5.2f ldpe %s\n", cputime(), pn);
sect = nil;
version++;
base = Boffset(f);
obj = mal(sizeof *obj);
obj->f = f;
obj->base = base;
obj->name = pn;
// read header
if(Bread(f, &obj->fh, sizeof obj->fh) != sizeof obj->fh)
goto bad;
// load section list
obj->sect = mal(obj->fh.NumberOfSections*sizeof obj->sect[0]);
obj->nsect = obj->fh.NumberOfSections;
for(i=0; i < obj->fh.NumberOfSections; i++) {
if(Bread(f, &obj->sect[i].sh, sizeof sh) != sizeof sh)
goto bad;
obj->sect[i].size = obj->sect[i].sh.SizeOfRawData;
obj->sect[i].name = (char*)obj->sect[i].sh.Name;
// TODO return error if found .cormeta
}
// load string table
Bseek(f, base+obj->fh.PointerToSymbolTable+18*obj->fh.NumberOfSymbols, 0);
if(Bread(f, &l, sizeof l) != sizeof l)
goto bad;
obj->snames = mal(l);
Bseek(f, base+obj->fh.PointerToSymbolTable+18*obj->fh.NumberOfSymbols, 0);
if(Bread(f, obj->snames, l) != l)
goto bad;
// read symbols
obj->pesym = mal(obj->fh.NumberOfSymbols*sizeof obj->pesym[0]);
obj->npesym = obj->fh.NumberOfSymbols;
Bseek(f, base+obj->fh.PointerToSymbolTable, 0);
for(i=0; i<obj->fh.NumberOfSymbols; i+=numaux+1) {
Bseek(f, base+obj->fh.PointerToSymbolTable+sizeof(symbuf)*i, 0);
if(Bread(f, symbuf, sizeof symbuf) != sizeof symbuf)
goto bad;
if((symbuf[0] == 0) && (symbuf[1] == 0) &&
(symbuf[2] == 0) && (symbuf[3] == 0)) {
l = le32(&symbuf[4]);
obj->pesym[i].name = (char*)&obj->snames[l];
} else { // sym name length <= 8
obj->pesym[i].name = mal(9);
strncpy(obj->pesym[i].name, (char*)symbuf, 8);
obj->pesym[i].name[8] = 0;
}
obj->pesym[i].value = le32(&symbuf[8]);
obj->pesym[i].sectnum = le16(&symbuf[12]);
obj->pesym[i].sclass = symbuf[16];
obj->pesym[i].aux = symbuf[17];
obj->pesym[i].type = le16(&symbuf[14]);
numaux = obj->pesym[i].aux;
if (numaux < 0)
numaux = 0;
}
// create symbols for mapped sections
for(i=0; i<obj->nsect; i++) {
sect = &obj->sect[i];
if(sect->sh.Characteristics&IMAGE_SCN_MEM_DISCARDABLE)
continue;
if(map(obj, sect) < 0)
goto bad;
name = smprint("%s(%s)", pn, sect->name);
s = lookup(name, version);
free(name);
switch(sect->sh.Characteristics&(IMAGE_SCN_CNT_UNINITIALIZED_DATA|IMAGE_SCN_CNT_INITIALIZED_DATA|
IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE)) {
case IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ: //.rdata
s->type = SRODATA;
break;
case IMAGE_SCN_CNT_UNINITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE: //.bss
s->type = SBSS;
break;
case IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE: //.data
s->type = SDATA;
break;
case IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ: //.text
s->type = STEXT;
break;
default:
werrstr("unexpected flags for PE section %s", sect->name);
goto bad;
}
s->p = sect->base;
s->np = sect->size;
s->size = sect->size;
if(s->type == STEXT) {
if(etextp)
etextp->next = s;
else
textp = s;
etextp = s;
}
sect->sym = s;
if(strcmp(sect->name, ".rsrc") == 0)
setpersrc(sect->sym);
}
// load relocations
for(i=0; i<obj->nsect; i++) {
rsect = &obj->sect[i];
if(rsect->sym == 0 || rsect->sh.NumberOfRelocations == 0)
continue;
if(rsect->sh.Characteristics&IMAGE_SCN_MEM_DISCARDABLE)
continue;
r = mal(rsect->sh.NumberOfRelocations*sizeof r[0]);
Bseek(f, obj->base+rsect->sh.PointerToRelocations, 0);
for(j=0; j<rsect->sh.NumberOfRelocations; j++) {
rp = &r[j];
if(Bread(f, symbuf, 10) != 10)
goto bad;
uint32 rva, symindex;
uint16 type;
rva = le32(&symbuf[0]);
symindex = le32(&symbuf[4]);
type = le16(&symbuf[8]);
if(readsym(obj, symindex, &sym) < 0)
goto bad;
if(sym->sym == nil) {
werrstr("reloc of invalid sym %s idx=%d type=%d", sym->name, symindex, sym->type);
goto bad;
}
rp->sym = sym->sym;
rp->siz = 4;
rp->off = rva;
switch(type) {
default:
diag("%s: unknown relocation type %d;", pn, type);
case IMAGE_REL_I386_REL32:
case IMAGE_REL_AMD64_REL32:
case IMAGE_REL_AMD64_ADDR32: // R_X86_64_PC32
case IMAGE_REL_AMD64_ADDR32NB:
rp->type = D_PCREL;
rp->add = le32(rsect->base+rp->off);
break;
case IMAGE_REL_I386_DIR32NB:
case IMAGE_REL_I386_DIR32:
rp->type = D_ADDR;
// load addend from image
rp->add = le32(rsect->base+rp->off);
break;
case IMAGE_REL_AMD64_ADDR64: // R_X86_64_64
rp->siz = 8;
rp->type = D_ADDR;
// load addend from image
rp->add = le64(rsect->base+rp->off);
break;
}
}
qsort(r, rsect->sh.NumberOfRelocations, sizeof r[0], rbyoff);
s = rsect->sym;
s->r = r;
s->nr = rsect->sh.NumberOfRelocations;
}
// enter sub-symbols into symbol table.
for(i=0; i<obj->npesym; i++) {
if(obj->pesym[i].name == 0)
continue;
if(obj->pesym[i].name[0] == '.') //skip section
continue;
if(obj->pesym[i].sectnum > 0) {
sect = &obj->sect[obj->pesym[i].sectnum-1];
if(sect->sym == 0)
continue;
}
if(readsym(obj, i, &sym) < 0)
goto bad;
s = sym->sym;
if(sym->sectnum == 0) {// extern
if(s->type == SDYNIMPORT)
s->plt = -2; // flag for dynimport in PE object files.
if (s->type == SXREF && sym->value > 0) {// global data
s->type = SDATA;
s->size = sym->value;
}
continue;
} else if (sym->sectnum > 0) {
sect = &obj->sect[sym->sectnum-1];
if(sect->sym == 0)
diag("%s: %s sym == 0!", pn, s->name);
} else {
diag("%s: %s sectnum < 0!", pn, s->name);
}
if(sect == nil)
return;
s->sub = sect->sym->sub;
sect->sym->sub = s;
s->type = sect->sym->type | SSUB;
s->value = sym->value;
s->size = 4;
s->outer = sect->sym;
if(sect->sym->type == STEXT) {
Prog *p;
if(s->text != P)
diag("%s: duplicate definition of %s", pn, s->name);
// build a TEXT instruction with a unique pc
// just to make the rest of the linker happy.
p = prg();
p->as = ATEXT;
p->from.type = D_EXTERN;
p->from.sym = s;
p->textflag = 7;
p->to.type = D_CONST;
p->link = nil;
p->pc = pc++;
s->text = p;
etextp->next = s;
etextp = s;
}
}
return;
bad:
diag("%s: malformed pe file: %r", pn);
}
void
ldpe(Biobuf *f, char *pkg, int64 len, char *pn)
{
char *name;
int32 base;
uint32 l;
int i, j, numaux;
PeObj *obj;
PeSect *sect, *rsect;
IMAGE_SECTION_HEADER sh;
uchar symbuf[18];
LSym *s;
Reloc *r, *rp;
PeSym *sym;
USED(len);
if(debug['v'])
Bprint(&bso, "%5.2f ldpe %s\n", cputime(), pn);
sect = nil;
ctxt->version++;
base = Boffset(f);
obj = mal(sizeof *obj);
obj->f = f;
obj->base = base;
obj->name = pn;
// read header
if(Bread(f, &obj->fh, sizeof obj->fh) != sizeof obj->fh)
goto bad;
// load section list
obj->sect = mal(obj->fh.NumberOfSections*sizeof obj->sect[0]);
obj->nsect = obj->fh.NumberOfSections;
for(i=0; i < obj->fh.NumberOfSections; i++) {
if(Bread(f, &obj->sect[i].sh, sizeof sh) != sizeof sh)
goto bad;
obj->sect[i].size = obj->sect[i].sh.SizeOfRawData;
obj->sect[i].name = (char*)obj->sect[i].sh.Name;
// TODO return error if found .cormeta
}
// load string table
Bseek(f, base+obj->fh.PointerToSymbolTable+sizeof(symbuf)*obj->fh.NumberOfSymbols, 0);
if(Bread(f, symbuf, 4) != 4)
goto bad;
l = le32(symbuf);
obj->snames = mal(l);
Bseek(f, base+obj->fh.PointerToSymbolTable+sizeof(symbuf)*obj->fh.NumberOfSymbols, 0);
if(Bread(f, obj->snames, l) != l)
goto bad;
// read symbols
obj->pesym = mal(obj->fh.NumberOfSymbols*sizeof obj->pesym[0]);
obj->npesym = obj->fh.NumberOfSymbols;
Bseek(f, base+obj->fh.PointerToSymbolTable, 0);
for(i=0; i<obj->fh.NumberOfSymbols; i+=numaux+1) {
Bseek(f, base+obj->fh.PointerToSymbolTable+sizeof(symbuf)*i, 0);
if(Bread(f, symbuf, sizeof symbuf) != sizeof symbuf)
goto bad;
if((symbuf[0] == 0) && (symbuf[1] == 0) &&
(symbuf[2] == 0) && (symbuf[3] == 0)) {
l = le32(&symbuf[4]);
obj->pesym[i].name = (char*)&obj->snames[l];
} else { // sym name length <= 8
obj->pesym[i].name = mal(9);
strncpy(obj->pesym[i].name, (char*)symbuf, 8);
obj->pesym[i].name[8] = 0;
}
obj->pesym[i].value = le32(&symbuf[8]);
obj->pesym[i].sectnum = le16(&symbuf[12]);
obj->pesym[i].sclass = symbuf[16];
obj->pesym[i].aux = symbuf[17];
obj->pesym[i].type = le16(&symbuf[14]);
numaux = obj->pesym[i].aux;
if (numaux < 0)
numaux = 0;
}
// create symbols for mapped sections
for(i=0; i<obj->nsect; i++) {
sect = &obj->sect[i];
if(sect->sh.Characteristics&IMAGE_SCN_MEM_DISCARDABLE)
continue;
if((sect->sh.Characteristics&(IMAGE_SCN_CNT_CODE|IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_CNT_UNINITIALIZED_DATA)) == 0) {
// This has been seen for .idata sections, which we
// want to ignore. See issues 5106 and 5273.
continue;
}
if(map(obj, sect) < 0)
goto bad;
name = smprint("%s(%s)", pkg, sect->name);
s = linklookup(ctxt, name, ctxt->version);
free(name);
switch(sect->sh.Characteristics&(IMAGE_SCN_CNT_UNINITIALIZED_DATA|IMAGE_SCN_CNT_INITIALIZED_DATA|
IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE)) {
case IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ: //.rdata
s->type = SRODATA;
break;
case IMAGE_SCN_CNT_UNINITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE: //.bss
s->type = SBSS;
break;
case IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE: //.data
s->type = SDATA;
break;
case IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ: //.text
s->type = STEXT;
break;
default:
werrstr("unexpected flags %#08ux for PE section %s", sect->sh.Characteristics, sect->name);
goto bad;
}
s->p = sect->base;
s->np = sect->size;
s->size = sect->size;
sect->sym = s;
if(strcmp(sect->name, ".rsrc") == 0)
setpersrc(sect->sym);
}
// load relocations
for(i=0; i<obj->nsect; i++) {
rsect = &obj->sect[i];
if(rsect->sym == 0 || rsect->sh.NumberOfRelocations == 0)
continue;
if(rsect->sh.Characteristics&IMAGE_SCN_MEM_DISCARDABLE)
continue;
if((sect->sh.Characteristics&(IMAGE_SCN_CNT_CODE|IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_CNT_UNINITIALIZED_DATA)) == 0) {
// This has been seen for .idata sections, which we
// want to ignore. See issues 5106 and 5273.
continue;
}
r = mal(rsect->sh.NumberOfRelocations*sizeof r[0]);
Bseek(f, obj->base+rsect->sh.PointerToRelocations, 0);
for(j=0; j<rsect->sh.NumberOfRelocations; j++) {
rp = &r[j];
if(Bread(f, symbuf, 10) != 10)
goto bad;
uint32 rva, symindex;
uint16 type;
rva = le32(&symbuf[0]);
symindex = le32(&symbuf[4]);
type = le16(&symbuf[8]);
if(readsym(obj, symindex, &sym) < 0)
goto bad;
if(sym->sym == nil) {
werrstr("reloc of invalid sym %s idx=%d type=%d", sym->name, symindex, sym->type);
goto bad;
}
rp->sym = sym->sym;
rp->siz = 4;
rp->off = rva;
switch(type) {
default:
diag("%s: unknown relocation type %d;", pn, type);
case IMAGE_REL_I386_REL32:
case IMAGE_REL_AMD64_REL32:
case IMAGE_REL_AMD64_ADDR32: // R_X86_64_PC32
case IMAGE_REL_AMD64_ADDR32NB:
rp->type = R_PCREL;
rp->add = (int32)le32(rsect->base+rp->off);
break;
case IMAGE_REL_I386_DIR32NB:
case IMAGE_REL_I386_DIR32:
rp->type = R_ADDR;
// load addend from image
rp->add = (int32)le32(rsect->base+rp->off);
break;
case IMAGE_REL_AMD64_ADDR64: // R_X86_64_64
rp->siz = 8;
rp->type = R_ADDR;
// load addend from image
rp->add = le64(rsect->base+rp->off);
break;
}
// ld -r could generate multiple section symbols for the
// same section but with different values, we have to take
// that into account
if (obj->pesym[symindex].name[0] == '.')
rp->add += obj->pesym[symindex].value;
}
qsort(r, rsect->sh.NumberOfRelocations, sizeof r[0], rbyoff);
s = rsect->sym;
s->r = r;
s->nr = rsect->sh.NumberOfRelocations;
}
// enter sub-symbols into symbol table.
for(i=0; i<obj->npesym; i++) {
if(obj->pesym[i].name == 0)
continue;
if(obj->pesym[i].name[0] == '.') //skip section
continue;
if(obj->pesym[i].sectnum > 0) {
sect = &obj->sect[obj->pesym[i].sectnum-1];
if(sect->sym == 0)
continue;
}
if(readsym(obj, i, &sym) < 0)
goto bad;
s = sym->sym;
if(sym->sectnum == 0) {// extern
if(s->type == SDYNIMPORT)
s->plt = -2; // flag for dynimport in PE object files.
if (s->type == SXREF && sym->value > 0) {// global data
s->type = SDATA;
s->size = sym->value;
}
continue;
} else if (sym->sectnum > 0) {
sect = &obj->sect[sym->sectnum-1];
if(sect->sym == 0)
diag("%s: %s sym == 0!", pn, s->name);
} else {
diag("%s: %s sectnum < 0!", pn, s->name);
}
if(sect == nil)
return;
if(s->outer != S) {
if(s->dupok)
continue;
diag("%s: duplicate symbol reference: %s in both %s and %s", pn, s->name, s->outer->name, sect->sym->name);
errorexit();
}
s->sub = sect->sym->sub;
sect->sym->sub = s;
s->type = sect->sym->type | SSUB;
s->value = sym->value;
s->size = 4;
s->outer = sect->sym;
if(sect->sym->type == STEXT) {
if(s->external && !s->dupok)
diag("%s: duplicate definition of %s", pn, s->name);
s->external = 1;
}
}
// Sort outer lists by address, adding to textp.
// This keeps textp in increasing address order.
for(i=0; i<obj->nsect; i++) {
s = obj->sect[i].sym;
if(s == S)
continue;
if(s->sub)
s->sub = listsort(s->sub, valuecmp, offsetof(LSym, sub));
if(s->type == STEXT) {
if(s->onlist)
sysfatal("symbol %s listed multiple times", s->name);
s->onlist = 1;
if(ctxt->etextp)
ctxt->etextp->next = s;
else
ctxt->textp = s;
ctxt->etextp = s;
for(s = s->sub; s != S; s = s->sub) {
if(s->onlist)
sysfatal("symbol %s listed multiple times", s->name);
s->onlist = 1;
ctxt->etextp->next = s;
ctxt->etextp = s;
}
}
}
return;
bad:
diag("%s: malformed pe file: %r", pn);
}
