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#include "stdafx.h"
#include "Output.h"
#include "Binary.h"
#include "Asm.h"
#include "Gc/CodeTable.h"
#include "Utils/Bitwise.h"
namespace code {
namespace x86 {
CodeOut::CodeOut(Binary *owner, Array<Nat> *lbls, Nat size, Nat numRefs) {
// Properly align 'size'.
this->size = size = roundUp(size, Nat(sizeof(void *)));
// Initialize our members.
this->owner = owner;
codeRefs = new (this) Array<TObject *>();
code = (byte *)runtime::allocCode(engine(), size, numRefs + 3);
labels = lbls;
pos = 0;
ref = 3;
// Store 'codeRefs' and 'owner' at position 0 and 1 in our references.
GcCode *refs = runtime::codeRefs(code);
refs->refs[0].offset = 0;
refs->refs[0].kind = GcCodeRef::ptrStorage;
refs->refs[0].pointer = owner;
refs->refs[1].offset = 0;
refs->refs[1].kind = GcCodeRef::ptrStorage;
refs->refs[1].pointer = codeRefs;
CodeTable::Handle unwind = codeTable().add(code);
refs->refs[2].offset = 0;
refs->refs[2].kind = GcCodeRef::codeInfo;
refs->refs[2].pointer = unwind;
}
#ifndef DEBUG
#undef assert
#define assert(...)
#endif
void CodeOut::putByte(Byte b) {
assert(pos < size);
code[pos++] = b;
}
void CodeOut::putInt(Nat w) {
assert(pos + 3 < size);
Nat *to = (Nat *)&code[pos];
*to = w;
pos += 4;
}
void CodeOut::putLong(Word w) {
assert(pos + 7 < size);
Word *to = (Word *)&code[pos];
*to = w;
pos += 8;
}
void CodeOut::putPtr(Word w) {
assert(pos + 3 < size);
Nat *to = (Nat *)&code[pos];
*to = (Nat)w;
pos += 4;
}
void CodeOut::align(Nat to) {
pos = roundUp(pos, to);
}
void CodeOut::putGc(GcCodeRef::Kind kind, Nat size, Word w) {
GcCode *refs = runtime::codeRefs(code);
assert(ref < refs->refCount);
refs->refs[ref].offset = pos;
refs->refs[ref].kind = kind;
refs->refs[ref].pointer = (void *)w;
ref++;
// The actual contents will be updated later...
pos += size;
}
void CodeOut::markGc(GcCodeRef::Kind kind, Nat size, Word w) {
GcCode *refs = runtime::codeRefs(code);
assert(ref < refs->refCount);
assert(pos >= size);
refs->refs[ref].offset = pos - size;
refs->refs[ref].kind = kind;
refs->refs[ref].pointer = (void *)w;
ref++;
}
void CodeOut::putGcPtr(Word w) {
GcCode *refs = runtime::codeRefs(code);
assert(ref < refs->refCount);
refs->refs[ref].offset = pos;
refs->refs[ref].kind = GcCodeRef::rawPtr;
refs->refs[ref].pointer = (void *)w;
ref++;
putPtr(w);
}
void CodeOut::putGcRelative(Word w) {
GcCode *refs = runtime::codeRefs(code);
assert(ref < refs->refCount);
refs->refs[ref].offset = pos;
refs->refs[ref].kind = GcCodeRef::relativePtr;
refs->refs[ref].pointer = (void *)w;
ref++;
putPtr(0); // Will be updated later...
}
void CodeOut::putRelativeStatic(Word w) {
assert(pos + 3 < size);
GcCode *refs = runtime::codeRefs(code);
assert(ref < refs->refCount);
refs->refs[ref].offset = pos;
refs->refs[ref].kind = GcCodeRef::relative;
refs->refs[ref].pointer = (void *)w;
ref++;
putPtr(0); // Will be updated later.
}
void CodeOut::putPtrSelf(Word w) {
GcCode *refs = runtime::codeRefs(code);
assert(ref < refs->refCount);
refs->refs[ref].offset = pos;
refs->refs[ref].kind = GcCodeRef::inside;
refs->refs[ref].pointer = (void *)(w - Word(codePtr()));
ref++;
putPtr(w);
}
Nat CodeOut::tell() const {
return pos;
}
void *CodeOut::codePtr() const {
return code;
}
void CodeOut::markLabel(Nat id) {
// No need. This should already be done for us.
}
void CodeOut::markGcRef(Ref r) {
if (ref == 0)
return;
codeRefs->push(new (this) CodeUpdater(r, owner, code, ref - 1));
}
void CodeOut::markRef(OffsetRef r, Nat ptr) {
Nat p = pos;
if (ptr)
p -= sizeof(size_t);
else
p -= sizeof(Nat);
codeRefs->push(new (this) CodeOffsetUpdater(r, owner, code, p, ptr));
}
Nat CodeOut::labelOffset(Nat id) {
if (id < labels->count()) {
return labels->at(id);
} else {
assert(false, L"Unknown label id: " + ::toS(id));
return 0;
}
}
Nat CodeOut::toRelative(Nat offset) {
return offset - (pos + 4);
}
}
}
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