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encode: Actually encode LOCK prefix

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This commit is contained in:
Alexis Engelke
2021-04-02 10:59:06 +02:00
parent 2d9587bc16
commit d9183228d0
2 changed files with 7 additions and 0 deletions
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2
encode.c
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@@ -66,6 +66,7 @@ opc_size(uint64_t opc)
else
res += 2;
} else {
if (opc & OPC_LOCK) res++;
if (opc & OPC_66) res++;
if (opc & OPC_F2) res++;
if (opc & OPC_F3) res++;
@@ -107,6 +108,7 @@ enc_opc(uint8_t** restrict buf, uint64_t opc)
b2 |= (~((opc & OPC_VEXOP_MSK) >> OPC_VEXOP_IDX) & 0xf) << 3;
*(*buf)++ = b2;
} else {
if (opc & OPC_LOCK) *(*buf)++ = 0xF0;
if (opc & OPC_66) *(*buf)++ = 0x66;
if (opc & OPC_F2) *(*buf)++ = 0xF2;
if (opc & OPC_F3) *(*buf)++ = 0xF3;

5
tests/test_encode.c
View File

@@ -239,6 +239,11 @@ main(int argc, char** argv)
TEST("\x69\x05\xf6\xff\xff\xff\x80\x00\x00\x00", FE_IMUL32rmi, FE_AX, FE_MEM(FE_IP, 0, 0, 0), 0x80);
TEST("\x66\x69\x05\xf7\xff\xff\xff\x80\x00", FE_IMUL16rmi, FE_AX, FE_MEM(FE_IP, 0, 0, 0), 0x80);
// Test LOCK prefix
TEST("\xf0\x87\x08", FE_LOCK_XCHG32mr, FE_MEM(FE_AX, 0, 0, 0), FE_CX);
TEST("\xf0\x0f\xc1\x01", FE_LOCK_XADD32mr, FE_MEM(FE_CX, 0, 0, 0), FE_AX);
TEST("\x64\x67\xf0\x41\x81\x84\x00\x00\xff\xff\xff\x78\x56\x34\x12", FE_LOCK_ADD32mi|FE_ADDR32|FE_SEG(FE_FS), FE_MEM(FE_R8, 1, FE_AX, -0x100), 0x12345678);
puts(failed ? "Some tests FAILED" : "All tests PASSED");
return failed ? EXIT_FAILURE : EXIT_SUCCESS;
}