AbleOS/holey-toys
2
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Move label dereferencing after the end of the compilation

Browse source
This commit is contained in:
Igor M 2024-03-11 13:20:38 +02:00
parent b4701bb4d5
commit c56e675f2c
1 changed files with 22 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

50
src/hbas.c
View file

@ -156,7 +156,7 @@ AsmError push_int_le(char *buf, uint64_t val, size_t size, uint8_t sign) {
}
AsmError assemble_instr(InstHt ht, char *input, size_t len, Token *tok,
ByteVec *rv, HoleVec *holes, LabelVec *labels) {
ByteVec *rv, HoleVec *holes) {
const InstDesc *inst;
const char *type_str;
size_t nargs;
@ -196,7 +196,10 @@ AsmError assemble_instr(InstHt ht, char *input, size_t len, Token *tok,
*tok = token(input, len, tok->start + tok->len);
if (tok->kind == TokNeg) {
*tok = token(input, len, tok->start + tok->len);
is_negative = ~(uint64_t)0;
if (tok->kind != TokNumber) {
return ErrTriedNegateNonNumber;
}
is_negative -= 1;
}
if (chr == 'R') {
int reg = parse_register(&input[tok->start], tok->len);
@ -209,26 +212,18 @@ AsmError assemble_instr(InstHt ht, char *input, size_t len, Token *tok,
uint64_t num_to_write;
if (meta.rel == 1 || meta.size == 8) {
if (tok->kind == TokIdent) {
size_t idx = label_lookup(labels, &input[tok->start], tok->len);
if (idx == INVALID) {
if (ensure_push((ByteVec *)holes, 1, sizeof(Hole)) != 0) {
return ErrOutOfMemory;
}
holes->buf[holes->len] = (Hole){
.location = rv->len,
.origin = inst_start,
.str = &input[tok->start],
.len = tok->len,
.size = (size_t)meta.size,
};
holes->len += 1;
num_to_write = 0;
} else {
num_to_write = labels->buf[idx].location;
if (meta.size != 8) {
num_to_write -= inst_start;
}
if (ensure_push((ByteVec*)holes, sizeof(Hole), 1) != 0) {
return ErrOutOfMemory;
}
holes->buf[holes->len] = (Hole) {
.location = rv->len,
.origin = inst_start,
.str = &input[tok->start],
.len = tok->len,
.size = (size_t)meta.size,
};
holes->len += 1;
num_to_write = 0;
} else if (tok->kind == TokNumber) {
num_to_write = tok->num;
} else {
@ -249,18 +244,17 @@ AsmError assemble_instr(InstHt ht, char *input, size_t len, Token *tok,
}
AsmError err =
push_int_le(&rv->buf[rv->len], num_to_write, meta.size, meta.sign);
if (err != 0) {
if (err != ErrOk) {
return err;
}
rv->len += meta.size;
}
}
return 0;
return ErrOk;
}
AsmError assemble(InstHt ht, char *input, size_t len, ByteVec *out,
EInfo *einfo) {
AsmError assemble(InstHt ht, char *input, size_t len, ByteVec *out, EInfo *einfo) {
ByteVec rv = {malloc(MIN_SIZE), MIN_SIZE, 0};
HoleVec holes = {malloc(MIN_SIZE * sizeof(Hole)), MIN_SIZE, 0};
LabelVec labels = {malloc(MIN_SIZE * sizeof(Label)), MIN_SIZE, 0};
@ -340,7 +334,7 @@ AsmError assemble(InstHt ht, char *input, size_t len, ByteVec *out,
goto end;
}
line_state = 2;
err = assemble_instr(ht, input, len, &tok, &rv, &holes, &labels);
err = assemble_instr(ht, input, len, &tok, &rv, &holes);
pos = tok.start + tok.len;
if (err != 0) {
goto end;
@ -356,9 +350,9 @@ AsmError assemble(InstHt ht, char *input, size_t len, ByteVec *out,
Hole *hole = &holes.buf[ii];
size_t idx = label_lookup(&labels, hole->str, hole->len);
uint64_t num_to_write = labels.buf[idx].location;
uint8_t sign = 1;
uint8_t sign = 2;
if (hole->size != 8) {
sign = 2;
sign = 1;
num_to_write -= hole->origin;
}
err = push_int_le(&rv.buf[hole->location], num_to_write, hole->size, sign);