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Instruction validator now doesn't pass 'push/pop [mem]' having unknown size

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kobalicek
2020-07-06 00:09:17 +02:00
parent ae4ad9075d
commit 2de7e74244
2 changed files with 23 additions and 6 deletions
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8
src/asmjit/x86/x86instdb.cpp
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@@ -2997,11 +2997,11 @@ const InstDB::InstSignature InstDB::_instSignatureTable[] = {
ROW(3, 1, 1, 1, 27 , 4 , 33 , 0 , 0 , 0 ), // {r16|m16|mem, r16, <ax>}
ROW(3, 1, 1, 1, 28 , 6 , 36 , 0 , 0 , 0 ), // {r32|m32|mem, r32, <eax>}
ROW(3, 0, 1, 1, 15 , 8 , 38 , 0 , 0 , 0 ), // {r64|m64|mem, r64, <rax>}
ROW(1, 1, 1, 0, 69 , 0 , 0 , 0 , 0 , 0 ), // #127 {r16|m16|r64|m64|mem}
ROW(1, 1, 1, 0, 69 , 0 , 0 , 0 , 0 , 0 ), // #127 {r16|m16|r64|m64}
ROW(1, 1, 0, 0, 13 , 0 , 0 , 0 , 0 , 0 ), // {r32|m32}
ROW(1, 1, 0, 0, 70 , 0 , 0 , 0 , 0 , 0 ), // {ds|es|ss}
ROW(1, 1, 1, 0, 71 , 0 , 0 , 0 , 0 , 0 ), // {fs|gs}
ROW(1, 1, 1, 0, 72 , 0 , 0 , 0 , 0 , 0 ), // #131 {r16|m16|r64|m64|mem|i8|i16|i32}
ROW(1, 1, 1, 0, 72 , 0 , 0 , 0 , 0 , 0 ), // #131 {r16|m16|r64|m64|i8|i16|i32}
ROW(1, 1, 0, 0, 73 , 0 , 0 , 0 , 0 , 0 ), // {r32|m32|i32|u32}
ROW(1, 1, 0, 0, 74 , 0 , 0 , 0 , 0 , 0 ), // {cs|ss|ds|es}
ROW(1, 1, 1, 0, 71 , 0 , 0 , 0 , 0 , 0 ), // {fs|gs}
@@ -3424,10 +3424,10 @@ const InstDB::OpSignature InstDB::_opSignatureTable[] = {
ROW(F(Vm), M(Vm64y), 0, 0x00),
ROW(F(Vm), M(Vm64z), 0, 0x00),
ROW(F(GpbLo) | F(Implicit), 0, 0, 0x01),
ROW(F(Gpw) | F(Gpq) | F(Mem), M(M16) | M(M64) | M(Any), 0, 0x00),
ROW(F(Gpw) | F(Gpq) | F(Mem), M(M16) | M(M64), 0, 0x00),
ROW(F(SReg), 0, 0, 0x1A),
ROW(F(SReg), 0, 0, 0x60),
ROW(F(Gpw) | F(Gpq) | F(Mem) | F(I8) | F(I16) | F(I32), M(M16) | M(M64) | M(Any), 0, 0x00),
ROW(F(Gpw) | F(Gpq) | F(Mem) | F(I8) | F(I16) | F(I32), M(M16) | M(M64), 0, 0x00),
ROW(F(Gpd) | F(Mem) | F(I32) | F(U32), M(M32), 0, 0x00),
ROW(F(SReg), 0, 0, 0x1E),
ROW(F(Vm), M(Vm64x) | M(Vm64y), 0, 0x00),

19
tools/tablegen-x86.js
View File

@@ -282,6 +282,20 @@ class GenUtils {
}
}
// Prevent some instructions from having implicit memory size if that would
// make them ambiguous. There are some instructions where the ambiguity is
// okay, but some like 'push' and 'pop' where it isn't.
static canUseImplicitMemSize(name) {
switch (name) {
case "pop":
case "push":
return false;
default:
return true;
}
}
static singleRegCase(name) {
switch (name) {
case "xchg" :
@@ -1406,7 +1420,8 @@ class SignatureArray extends Array {
// Patch all instructions to accept implicit-size memory operand.
for (bIndex = 0; bIndex < sameSizeSet.length; bIndex++) {
const bInst = sameSizeSet[bIndex];
if (implicit) bInst[memPos].flags.mem = true;
if (implicit)
bInst[memPos].flags.mem = true;
if (!implicit)
DEBUG(`${this.name}: Explicit: ${bInst}`);
@@ -1697,7 +1712,9 @@ class InstSignatureTable extends core.Task {
}
}
if (signatures.length && GenUtils.canUseImplicitMemSize(dbInsts[0].name))
signatures.calcImplicitMemSize();
signatures.simplify();
signatures.compact();