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perfaware/code/8086/serializer.c
T
ed d3fd791537 working on serializer
2026-09-09 12:09:12 -04:00

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#ifdef INTELLISENSE_DIRECTIVES
# include "serializer.h"
#endif
enum {
X8616_SERIALIZE_HEADER_LEN = 9,
};
RO_ global Str8 x8616_serialize_header = slit8("bits 16\n\n");
RO_ global Str8 x8616_serialize_mnemonic[] = {
[x8616_op_invalid] = slit8(""),
[x8616_op_nop] = slit8("nop"),
[x8616_op_mov] = slit8("mov"),
[x8616_op_add] = slit8("add"),
[x8616_op_or] = slit8("or"),
[x8616_op_adc] = slit8("adc"),
[x8616_op_sbb] = slit8("sbb"),
[x8616_op_and] = slit8("and"),
[x8616_op_sub] = slit8("sub"),
[x8616_op_xor] = slit8("xor"),
[x8616_op_cmp] = slit8("cmp"),
[x8616_op_push] = slit8("push"),
[x8616_op_pop] = slit8("pop"),
[x8616_op_xchg] = slit8("xchg"),
[x8616_op_in] = slit8("in"),
[x8616_op_out] = slit8("out"),
[x8616_op_xlat] = slit8("xlat"),
[x8616_op_lea] = slit8("lea"),
[x8616_op_lds] = slit8("lds"),
[x8616_op_les] = slit8("les"),
[x8616_op_lahf] = slit8("lahf"),
[x8616_op_sahf] = slit8("sahf"),
[x8616_op_pushf] = slit8("pushf"),
[x8616_op_popf] = slit8("popf"),
[x8616_op_inc] = slit8("inc"),
[x8616_op_aaa] = slit8("aaa"),
[x8616_op_daa] = slit8("daa"),
[x8616_op_dec] = slit8("dec"),
[x8616_op_neg] = slit8("neg"),
[x8616_op_aas] = slit8("aas"),
[x8616_op_das] = slit8("das"),
[x8616_op_mul] = slit8("mul"),
[x8616_op_imul] = slit8("imul"),
[x8616_op_aam] = slit8("aam"),
[x8616_op_div] = slit8("div"),
[x8616_op_idiv] = slit8("idiv"),
[x8616_op_aad] = slit8("aad"),
[x8616_op_cbw] = slit8("cbw"),
[x8616_op_cwd] = slit8("cwd"),
[x8616_op_not] = slit8("not"),
[x8616_op_shl] = slit8("shl"),
[x8616_op_shr] = slit8("shr"),
[x8616_op_sar] = slit8("sar"),
[x8616_op_rol] = slit8("rol"),
[x8616_op_ror] = slit8("ror"),
[x8616_op_rcl] = slit8("rcl"),
[x8616_op_rcr] = slit8("rcr"),
[x8616_op_test] = slit8("test"),
[x8616_op_rep] = slit8(""),
[x8616_op_movs] = slit8("movs"),
[x8616_op_cmps] = slit8("cmps"),
[x8616_op_scas] = slit8("scas"),
[x8616_op_lods] = slit8("lods"),
[x8616_op_stos] = slit8("stos"),
[x8616_op_call] = slit8("call"),
[x8616_op_jmp] = slit8("jmp"),
[x8616_op_ret] = slit8("ret"),
[x8616_op_retf] = slit8("retf"),
[x8616_op_je] = slit8("je"),
[x8616_op_jl] = slit8("jl"),
[x8616_op_jle] = slit8("jle"),
[x8616_op_jb] = slit8("jb"),
[x8616_op_jbe] = slit8("jbe"),
[x8616_op_jp] = slit8("jp"),
[x8616_op_jo] = slit8("jo"),
[x8616_op_js] = slit8("js"),
[x8616_op_jne] = slit8("jne"),
[x8616_op_jnl] = slit8("jnl"),
[x8616_op_jg] = slit8("jg"),
[x8616_op_jnb] = slit8("jnb"),
[x8616_op_ja] = slit8("ja"),
[x8616_op_jnp] = slit8("jnp"),
[x8616_op_jno] = slit8("jno"),
[x8616_op_jns] = slit8("jns"),
[x8616_op_loop] = slit8("loop"),
[x8616_op_loopz] = slit8("loopz"),
[x8616_op_loopnz] = slit8("loopnz"),
[x8616_op_jcxz] = slit8("jcxz"),
[x8616_op_int] = slit8("int"),
[x8616_op_int3] = slit8("int3"),
[x8616_op_into] = slit8("into"),
[x8616_op_iret] = slit8("iret"),
[x8616_op_clc] = slit8("clc"),
[x8616_op_cmc] = slit8("cmc"),
[x8616_op_stc] = slit8("stc"),
[x8616_op_cld] = slit8("cld"),
[x8616_op_std] = slit8("std"),
[x8616_op_cli] = slit8("cli"),
[x8616_op_sti] = slit8("sti"),
[x8616_op_hlt] = slit8("hlt"),
[x8616_op_wait] = slit8("wait"),
[x8616_op_lock] = slit8(""),
[x8616_op_segment] = slit8(""),
};
RO_ global Str8 x8616_serialize_reg8[] = {
[x8616_al] = slit8("al"),
[x8616_cl] = slit8("cl"),
[x8616_dl] = slit8("dl"),
[x8616_bl] = slit8("bl"),
[x8616_ah] = slit8("ah"),
[x8616_ch] = slit8("ch"),
[x8616_dh] = slit8("dh"),
[x8616_bh] = slit8("bh"),
};
RO_ global Str8 x8616_serialize_reg16[] = {
[x8616_ax] = slit8("ax"),
[x8616_cx] = slit8("cx"),
[x8616_dx] = slit8("dx"),
[x8616_bx] = slit8("bx"),
[x8616_sp] = slit8("sp"),
[x8616_bp] = slit8("bp"),
[x8616_si] = slit8("si"),
[x8616_di] = slit8("di"),
};
RO_ global Str8 x8616_serialize_seg[] = {
[x8616_es] = slit8("es"),
[x8616_cs] = slit8("cs"),
[x8616_ss] = slit8("ss"),
[x8616_ds] = slit8("ds"),
};
RO_ global Str8 x8616_serialize_ea[] = {
[x8616_ea_bx_si] = slit8("bx + si"),
[x8616_ea_bx_di] = slit8("bx + di"),
[x8616_ea_bp_si] = slit8("bp + si"),
[x8616_ea_bp_di] = slit8("bp + di"),
[x8616_ea_si] = slit8("si"),
[x8616_ea_di] = slit8("di"),
[x8616_ea_bp] = slit8("bp"),
[x8616_ea_bx] = slit8("bx"),
};
typedef Enum_(U1, X8616_SerializeSizeWhere) {
x8616_serialize_size_none = 0x00,
x8616_serialize_size_before_mem = 0x01,
x8616_serialize_size_before_imm = 0x02,
};
FI_ B4 x8616_serialize_put(Str8Gen_R gen, Str8 piece) {
if (piece.len > gen->cap - gen->len) return false;
str8gen_append_str8(gen, piece); return true;
}
FI_ X8616_SerializeStatus x8616_serialize_put_or_full(Str8Gen_R gen, Str8 piece) {
X8616_SerializeStatus status = x8616_serialize_ok;
if (x8616_serialize_put(gen, piece) == 0) status = x8616_serialize_output_full;
return status;
}
internal B4 x8616_serialize_put_u4(Str8Gen_R gen, U4 value) {
Info_str8_from_u4 info = str8_from_u4_info(value, 10, 0, 0);
UTF8 digits[16];
B4 ok = info.size_required != 0 && info.size_required <= Array_len(digits) && info.size_required <= gen->cap - gen->len;
if (ok) {
Str8 text = str8_from_u4_buf(slice_ut(digits, info.size_required), value, 10, 0, 0, info);
ok = x8616_serialize_put(gen, text);
}
return ok;
}
internal B4 x8616_serialize_put_s4(Str8Gen_R gen, S4 value) {
B4 ok = true;
if (value < 0) {
ok = x8616_serialize_put(gen, slit8("-"));
if (ok) ok = x8616_serialize_put_u4(gen, C_(U4, -value));
}
else {
ok = x8616_serialize_put_u4(gen, C_(U4, value));
}
return ok;
}
internal S4 x8616_serialize_s4_from_bits(U2 bits, U1 byte_count) {
if (byte_count <= 1) {
U4 value = bits & 0xFF;
if (value & 0x80) return C_(S4, value) - 256;
return C_(S4, value);
}
U4 value = bits;
if (value & 0x8000) return C_(S4, value) - 65536;
return C_(S4, value);
}
FI_ B4 x8616_serialize_imm_is_signed(X8616_Op op) { switch (op) {
case x8616_op_mov:
case x8616_op_add:
case x8616_op_adc:
case x8616_op_sub:
case x8616_op_sbb:
case x8616_op_cmp:
case x8616_op_ret:
case x8616_op_retf:
return 1;
default:
return 0;
}}
FI_ U1 x8616_serialize_imm_bytes(X8616_DecodedOperandFlags flags, U1 immediate_bytes, X8616_WidthMode width) {
if (immediate_bytes) return immediate_bytes;
if (flags & x8616_decoded_operand_sign_extended) return 1;
if (width == x8616_width_word) return 2;
return 1;
}
internal B4
x8616_serialize_put_imm(Str8Gen_R gen, X8616_DecodedInstruction_R inst, X8616_DecodedOperand_R operand) {
U1 bytes = x8616_serialize_imm_bytes(operand->flags, operand->immediate_bytes, operand->width);
if (x8616_serialize_imm_is_signed(inst->op)) {
return x8616_serialize_put_s4(gen, x8616_serialize_s4_from_bits(operand->immediate, bytes));
}
U4 value = operand->immediate;
if (bytes <= 1) value &= 0xFF;
return x8616_serialize_put_u4(gen, value);
}
internal X8616_WidthMode
x8616_serialize_mem_width(X8616_DecodedInstruction_R inst) {
for (U1 id = 0; id < inst->operand_count; ++id) {
if (inst->operands[id].flags & x8616_decoded_operand_memory) return inst->operands[id].width;
}
return inst->width;
}
internal X8616_SerializeSizeWhere
x8616_serialize_size_where(X8616_Op op, U1 operand_count, X8616_DecodedOperand operands[static 2])
{
B4 has_mem = 0;
B4 has_imm = 0;
for (U1 id = 0; id < operand_count; ++id) {
X8616_DecodedOperandFlags flags = operands[id].flags;
if (flags & x8616_decoded_operand_memory) has_mem = 1;
if ((flags & x8616_decoded_operand_immediate) && ((flags & x8616_decoded_operand_register) == 0)) has_imm = 1;
}
switch (op) {
case x8616_op_mov:
if (has_mem && has_imm) return x8616_serialize_size_before_imm;
return x8616_serialize_size_none;
case x8616_op_add:
case x8616_op_adc:
case x8616_op_sub:
case x8616_op_sbb:
case x8616_op_cmp:
case x8616_op_and:
case x8616_op_or:
case x8616_op_xor:
case x8616_op_test:
if (has_mem && has_imm) return x8616_serialize_size_before_mem;
return x8616_serialize_size_none;
case x8616_op_not:
case x8616_op_neg:
case x8616_op_inc:
case x8616_op_dec:
case x8616_op_mul:
case x8616_op_imul:
case x8616_op_div:
case x8616_op_idiv:
case x8616_op_push:
case x8616_op_pop:
case x8616_op_shl:
case x8616_op_shr:
case x8616_op_sar:
case x8616_op_rol:
case x8616_op_ror:
case x8616_op_rcl:
case x8616_op_rcr:
if (has_mem) return x8616_serialize_size_before_mem;
return x8616_serialize_size_none;
default:
return x8616_serialize_size_none;
}
}
internal B4 x8616_serialize_put_size(Str8Gen_R gen, X8616_WidthMode width) {
Str8 name = slit8("");
if (width == x8616_width_byte) name = slit8("byte");
if (width == x8616_width_word) name = slit8("word");
B4 ok = name.len != 0;
if (ok) ok = x8616_serialize_put(gen, name);
if (ok) ok = x8616_serialize_put(gen, slit8(" "));
return ok;
}
internal B4
x8616_serialize_put_memory(Str8Gen_R gen, X8616_DecodedInstruction_R inst, X8616_DecodedOperand_R operand)
{
B4 ok = true;
if (inst->prefixes.has_segment) {
ok = x8616_serialize_put(gen, x8616_serialize_seg[inst->prefixes.segment]);
if (ok) ok = x8616_serialize_put(gen, slit8(":"));
}
if (ok) ok = x8616_serialize_put(gen, slit8("["));
if (ok && (operand->flags & x8616_decoded_operand_direct)) {
ok = x8616_serialize_put_u4(gen, operand->address);
}
else if (ok) {
ok = x8616_serialize_put(gen, x8616_serialize_ea[operand->ea]);
S4 disp = operand->displacement;
if (ok && disp > 0) {
ok = x8616_serialize_put(gen, slit8(" + "));
if (ok) ok = x8616_serialize_put_u4(gen, C_(U4, disp));
}
else if (ok && disp < 0) {
ok = x8616_serialize_put(gen, slit8(" - "));
if (ok) ok = x8616_serialize_put_u4(gen, C_(U4, -disp));
}
}
if (ok) ok = x8616_serialize_put(gen, slit8("]"));
return ok;
}
FI_ B4 x8616_serialize_is_string(X8616_Op op) { switch (op) {
case x8616_op_movs:
case x8616_op_cmps:
case x8616_op_scas:
case x8616_op_lods:
case x8616_op_stos:
return 1;
default:
return 0;
}}
FI_ B4 x8616_serialize_has_memory(X8616_DecodedInstruction* inst) {
for (U1 id = 0; id < inst->operand_count; ++id) { if (inst->operands[id].flags & x8616_decoded_operand_memory) return 1; }
return 0;
}
internal X8616_SerializeStatus
x8616_serialize_put_operand(Str8Gen_R gen, X8616_DecodedInstruction* inst, X8616_DecodedOperand* operand)
{
X8616_SerializeStatus status = x8616_serialize_ok;
X8616_SerializeSizeWhere where = x8616_serialize_size_where(inst->op, inst->operand_count, inst->operands);
X8616_WidthMode width = x8616_serialize_mem_width(inst);
B4 is_mem = (operand->flags & x8616_decoded_operand_memory) != 0;
B4 is_imm = ((operand->flags & x8616_decoded_operand_immediate) != 0) && ((operand->flags & x8616_decoded_operand_register) == 0);
B4 is_reg = (operand->flags & x8616_decoded_operand_register) != 0;
B4 is_seg = (operand->flags & x8616_decoded_operand_segment) != 0;
B4 is_rel = (operand->flags & x8616_decoded_operand_relative) != 0;
B4 is_far = (operand->flags & x8616_decoded_operand_far_ptr) != 0;
if (status == x8616_serialize_ok && where == x8616_serialize_size_before_mem && is_mem) {
if (x8616_serialize_put_size(gen, width) == 0) status = x8616_serialize_output_full;
}
if (status == x8616_serialize_ok && where == x8616_serialize_size_before_imm && is_imm) {
if (x8616_serialize_put_size(gen, width) == 0) status = x8616_serialize_output_full;
}
if (status == x8616_serialize_ok && (inst->flags & x8616_encoding_far) && is_mem) {
status = x8616_serialize_put_or_full(gen, slit8("far "));
}
if (status == x8616_serialize_ok) {
if (is_reg) {
U1 index = C_(U1, operand->reg.r16);
if (operand->width == x8616_width_byte) status = x8616_serialize_put_or_full(gen, x8616_serialize_reg8 [index]);
else if (operand->width == x8616_width_word) status = x8616_serialize_put_or_full(gen, x8616_serialize_reg16[index]);
else status = x8616_serialize_unsupported_form;
}
else if (is_seg) {
status = x8616_serialize_put_or_full(gen, x8616_serialize_seg[operand->segment]);
}
else if (is_mem) {
if (x8616_serialize_put_memory(gen, inst, operand) == 0) status = x8616_serialize_output_full;
}
else if (is_imm) {
if (x8616_serialize_put_imm(gen, inst, operand) == 0) status = x8616_serialize_output_full;
}
else if (is_rel) {
S4 rel = C_(S4, inst->size) + operand->displacement;
status = x8616_serialize_put_or_full(gen, slit8("$"));
if (status == x8616_serialize_ok && rel >= 0) status = x8616_serialize_put_or_full(gen, slit8("+"));
if (status == x8616_serialize_ok && x8616_serialize_put_s4(gen, rel) == 0) status = x8616_serialize_output_full;
}
else if (is_far) {
if (x8616_serialize_put_u4(gen, operand->far_segment) == 0) status = x8616_serialize_output_full;
if (status == x8616_serialize_ok) status = x8616_serialize_put_or_full(gen, slit8(":"));
if (status == x8616_serialize_ok && x8616_serialize_put_u4(gen, operand->far_offset) == 0) status = x8616_serialize_output_full;
}
else {
status = x8616_serialize_unsupported_form;
}
}
return status;
}
FI_ X8616_DecodedOperandFlags x8616_serialize_base_flags(X8616_DecodedOperandFlags flags) {
return flags & (
x8616_decoded_operand_register
| x8616_decoded_operand_segment
| x8616_decoded_operand_memory
| x8616_decoded_operand_immediate
| x8616_decoded_operand_relative
| x8616_decoded_operand_far_ptr
);
}
FI_ B4 x8616_serialize_one_flag(X8616_DecodedOperandFlags flags) { U2 bits = C_(U2, flags); return (bits != 0) && ((bits & (bits - 1)) == 0); }
internal X8616_SerializeStatus
x8616_serialize_validate(X8616_DecodedInstruction_R inst)
{
X8616_SerializeStatus status = x8616_serialize_ok;
B4 bad_decode = inst->decode_flags & (x8616_decode_invalid | x8616_decode_truncated);
B4 invalid_sig = inst->size == 0 || inst->operand_count > 2;
B4 invalid_mnemonic = u4_(inst->op) >= Array_len(x8616_serialize_mnemonic) || inst->op == x8616_op_invalid;
B4 invalid_prefix_with_seg = inst->prefixes.has_segment && u1_(inst->prefixes.segment) >= Array_len(x8616_serialize_seg);
if (bad_decode || invalid_sig || invalid_mnemonic || invalid_prefix_with_seg) {
status = x8616_serialize_invalid_record; goto status_failed;
}
B4 bad_prefix_segement = inst->prefixes.has_segment && (x8616_serialize_has_memory(inst) == 0);
B4 bad_prefix_repeat = inst->prefixes.has_repeat && (x8616_serialize_is_string(inst->op) == 0);
if (bad_prefix_segement || bad_prefix_repeat) {
status = x8616_serialize_unsupported_form; goto status_failed;
}
for (U1 id = 0; id < inst->operand_count; ++id)
{
X8616_DecodedOperand_R operand = & inst->operands[id];
X8616_DecodedOperandFlags base = x8616_serialize_base_flags(operand->flags);
B4 invalid_flag = x8616_serialize_one_flag(base) == 0;
B4 has_operand_register = base & x8616_decoded_operand_register;
B4 has_operand_segment = base & x8616_decoded_operand_segment;
B4 has_operand_memory = base & x8616_decoded_operand_memory;
B4 invalid_reg_r16 = u1_(operand->reg.r16) >= Array_len(x8616_serialize_reg16);
B4 invalid_width = operand->width != x8616_width_byte && operand->width != x8616_width_word;
B4 invalid_operand_seg = u1_(operand->segment) >= Array_len(x8616_serialize_seg);
B4 invalid_operand_ea = u1_(operand->ea) >= Array_len(x8616_serialize_ea);
B4 invalid_direct_ea = has_operand_memory && ((operand->flags & x8616_decoded_operand_direct) == 0) && invalid_operand_ea;
B4 invalid_operand = invalid_flag
|| (has_operand_register && (invalid_reg_r16 || invalid_width))
|| (has_operand_segment && invalid_operand_seg)
|| invalid_direct_ea;
if (invalid_operand) {
status = x8616_serialize_invalid_record; goto status_failed;
}
}
status_failed:
return status;
}
internal X8616_SerializeStatus
x8616_serialize_instruction_line(Str8Gen_R line, X8616_DecodedInstruction* inst)
{
X8616_SerializeStatus st = x8616_serialize_ok;
Str8 mnemonic = x8616_serialize_mnemonic[inst->op];
if (mnemonic.len == 0) st = x8616_serialize_unsupported_form;
if (st == x8616_serialize_ok && inst->prefixes.lock) {
st = x8616_serialize_put_or_full(line, slit8("lock "));
}
if (st == x8616_serialize_ok && inst->prefixes.has_repeat) {
if (inst->prefixes.repeat == x8616_rep) st = x8616_serialize_put_or_full(line, slit8("rep "));
else st = x8616_serialize_put_or_full(line, slit8("repne "));
}
if (st == x8616_serialize_ok) st = x8616_serialize_put_or_full(line, mnemonic);
if (st == x8616_serialize_ok && x8616_serialize_is_string(inst->op)) {
if (inst->width == x8616_width_byte) st = x8616_serialize_put_or_full(line, slit8("b"));
else if (inst->width == x8616_width_word) st = x8616_serialize_put_or_full(line, slit8("w"));
else st = x8616_serialize_unsupported_form;
}
if (st == x8616_serialize_ok && inst->operand_count) {
st = x8616_serialize_put_or_full(line, slit8(" "));
for (U1 id = 0; st == x8616_serialize_ok && id < inst->operand_count; ++id) {
if (id) st = x8616_serialize_put_or_full(line, slit8(", "));
if (st == x8616_serialize_ok) st = x8616_serialize_put_operand(line, inst, & inst->operands[id]);
}
}
if (st == x8616_serialize_ok) st = x8616_serialize_put_or_full(line, slit8("\n"));
return st;
}
X8616_SerializeInfo
x8616_serialize_instructions(X8616_SerializeRequest request)
{
X8616_SerializeInfo result = {0}; result.text.ptr = C_(UTF8*, request.output.ptr);
B4 invalid_record =
(request.instruction_count && request.instructions == 0)
|| (request.output.len && request.output.ptr == 0)
|| (request.scratch.len && request.scratch.ptr == 0);
if (invalid_record) { result.status = x8616_serialize_invalid_record; goto exit; }
if (request.output.len < X8616_SERIALIZE_HEADER_LEN) { result.status = x8616_serialize_output_full; goto exit; }
Str8Gen gen = str8gen_make(request.output);
if (x8616_serialize_header.len > gen.cap - gen.len) { result.status = x8616_serialize_output_full; goto exit; }
str8gen_append_str8(& gen, x8616_serialize_header);
result.text.len = gen.len;
for (U4 id = 0; id < request.instruction_count; ++id) {
X8616_SerializeStatus line_status = x8616_serialize_validate(& request.instructions[id]);
if (line_status != x8616_serialize_ok) { result.status = line_status; goto exit; }
Str8Gen line = str8gen_make(request.scratch);
line_status = x8616_serialize_instruction_line(& line, & request.instructions[id]);
if (line_status != x8616_serialize_ok) { result.status = line_status; goto exit; }
Str8 text = str8(line.ptr, line.len);
if (text.len > gen.cap - gen.len) { result.status = x8616_serialize_output_full; goto exit; }
str8gen_append_str8(& gen, text);
result.text.len = gen.len;
result.instructions_written += 1;
}
result.status = x8616_serialize_ok;
exit:
return result;
}
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