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Fix printvideo regression and minor improvements

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This commit is contained in:
Justine Tunney 2020-08-26 09:41:07 -07:00
parent eb4bb43275
commit e86cff8ba0
25 changed files with 240 additions and 207 deletions
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24
third_party/xed/x86ild.greg.c vendored
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@ -517,17 +517,17 @@ privileged static int xed_consume_byte(struct XedDecodedInst *d) {
}
privileged static void xed_prefix_scanner(struct XedDecodedInst *d) {
xed_bits_t first_f2f3, last_f2f3;
xed_bits_t b, max_bytes, length, nprefixes, nseg_prefixes, nrexes, rex;
length = d->length;
max_bytes = d->op.max_bytes;
rex = nrexes = nprefixes = nseg_prefixes = 0;
first_f2f3 = last_f2f3 = rex = nrexes = nprefixes = nseg_prefixes = 0;
while (length < max_bytes) {
b = d->bytes[length];
if (xed_get_prefix_table_bit(b) == 0) goto out;
switch (b) {
case 0x66:
d->op.osz = true;
d->op.prefix66 = true;
rex = 0;
break;
case 0x67:
@ -558,17 +558,17 @@ privileged static void xed_prefix_scanner(struct XedDecodedInst *d) {
break;
case 0xF3:
d->op.ild_f3 = true;
d->op.last_f2f3 = 3;
if (!d->op.first_f2f3) {
d->op.first_f2f3 = 3;
last_f2f3 = 3;
if (!first_f2f3) {
first_f2f3 = 3;
}
rex = 0;
break;
case 0xF2:
d->op.ild_f2 = true;
d->op.last_f2f3 = 2;
if (!d->op.first_f2f3) {
d->op.first_f2f3 = 2;
last_f2f3 = 2;
if (!first_f2f3) {
first_f2f3 = 2;
}
rex = 0;
break;
@ -597,9 +597,9 @@ out:
d->op.rex = true;
}
if (d->op.mode_first_prefix) {
d->op.rep = d->op.first_f2f3;
d->op.rep = first_f2f3;
} else {
d->op.rep = d->op.last_f2f3;
d->op.rep = last_f2f3;
}
switch (d->op.ild_seg) {
case 0x2e:
@ -752,8 +752,8 @@ privileged static void xed_evex_scanner(struct XedDecodedInst *d) {
d->op.rexb = ~evex1.s.b_inv & 1;
d->op.rexrr = ~evex1.s.rr_inv & 1;
}
d->op.map = evex1.s.map;
d->op.rexw = evex2.s.rexw & 1;
d->op.map = evex1.s.map;
d->op.vexdest3 = evex2.s.vexdest3;
d->op.vexdest210 = evex2.s.vexdest210;
d->op.ubit = evex2.s.ubit;
@ -1199,7 +1199,7 @@ privileged static void xed_encode_rde(struct XedDecodedInst *x) {
/* fragile examples: addb, cmpxchgb */
/* fragile counterexamples: btc, bsr, etc. */
const uint8_t kWordLog2[2][2][2] = {{{2, 3}, {1, 3}}, {{0, 0}, {0, 0}}};
x->op.rde = x->op.prefix66 << 30 |
x->op.rde = x->op.rep << 30 |
kWordLog2[~x->op.opcode & 1][x->op.osz][x->op.rexw] << 28 |
x->op.mod << 22 | x->op.rexw << 11 | x->op.osz << 5 |
x->op.asz << 17 | (x->op.rexx << 3 | x->op.index) << 24 |