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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/log/check.h"
#include "libc/macros.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
#include "third_party/xed/x86.h"
const char kPrefixes[][8] = {
{},
{0x66},
{0x67},
{0x40},
{0x6F},
{0x66, 0x6F},
{0x66, 0x40},
{0x66, 0x6F},
{0x67, 0x40},
{0x67, 0x6F},
{0x66, 0x67},
{0x66, 0x67, 0x40},
{0x66, 0x67, 0x6F},
{0x0F},
{0x0F, 0x66},
{0x0F, 0x67},
{0x0F, 0x40},
{0x0F, 0x6F},
{0x0F, 0x66, 0x6F},
{0x0F, 0x66, 0x40},
{0x0F, 0x66, 0x6F},
{0x0F, 0x67, 0x40},
{0x0F, 0x67, 0x6F},
{0x0F, 0x66, 0x67},
{0x0F, 0x66, 0x67, 0x40},
{0x0F, 0x66, 0x67, 0x6F},
{0xF3, 0x0F},
{0xF3, 0x66, 0x0F},
{0xF3, 0x67, 0x0F},
{0xF3, 0x40, 0x0F},
{0xF3, 0x6F, 0x0F},
{0xF3, 0x66, 0x6F, 0x0F},
{0xF3, 0x66, 0x40, 0x0F},
{0xF3, 0x66, 0x6F, 0x0F},
{0xF3, 0x67, 0x40, 0x0F},
{0xF3, 0x67, 0x6F, 0x0F},
{0xF3, 0x66, 0x67, 0x0F},
{0xF3, 0x66, 0x67, 0x40, 0x0F},
{0xF3, 0x66, 0x67, 0x6F, 0x0F},
{0xF2, 0x0F},
{0xF2, 0x66, 0x0F},
{0xF2, 0x67, 0x0F},
{0xF2, 0x40, 0x0F},
{0xF2, 0x6F, 0x0F},
{0xF2, 0x66, 0x6F, 0x0F},
{0xF2, 0x66, 0x40, 0x0F},
{0xF2, 0x66, 0x6F, 0x0F},
{0xF2, 0x67, 0x40, 0x0F},
{0xF2, 0x67, 0x6F, 0x0F},
{0xF2, 0x66, 0x67, 0x0F},
{0xF2, 0x66, 0x67, 0x40, 0x0F},
{0xF2, 0x66, 0x67, 0x6F, 0x0F},
};
const uint8_t kModrmPicks[] = {
0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x0, 0x8, 0x10,
0x18, 0x20, 0x28, 0x30, 0x38, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
0x46, 0x47, 0x40, 0x48, 0x50, 0x58, 0x60, 0x68, 0x70, 0x78, 0x80,
0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x80, 0x88, 0x90, 0x98,
0xa0, 0xa8, 0xb0, 0xb8, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6,
0xc7, 0xc0, 0xc8, 0xd0, 0xd8, 0xe0, 0xe8, 0xf0, 0xf8,
};
const uint8_t kOpMap0[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44,
45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74,
75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104,
105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164,
165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194,
195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224,
225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
255,
};
void WriteOp(int fd, struct XedDecodedInst *xedd) {
int i;
char buf[128], *p;
p = stpcpy(buf, ".byte ");
for (i = 0; i < xedd->length; ++i) {
if (i) *p++ = ',';
*p++ = '0';
*p++ = 'x';
*p++ = "0123456789abcdef"[(xedd->bytes[i] & 0xf0) >> 4];
*p++ = "0123456789abcdef"[xedd->bytes[i] & 0x0f];
}
*p++ = '\n';
CHECK_NE(-1, write(fd, buf, p - buf));
}
int main(int argc, char *argv[]) {
int i, j, k, l, m, n, p, o, fd;
uint8_t op[16];
struct XedDecodedInst xedd[1];
fd = open("/tmp/ops.s", O_CREAT | O_TRUNC | O_RDWR, 0644);
for (o = 0; o < ARRAYLEN(kOpMap0); ++o) {
for (p = 0; p < ARRAYLEN(kPrefixes); ++p) {
memset(op, 0x55, 16);
n = strlen(kPrefixes[p]);
memcpy(op, kPrefixes[p], n);
op[n] = kOpMap0[o];
xed_decoded_inst_zero_set_mode(xedd, XED_MACHINE_MODE_LONG_64);
if (!xed_instruction_length_decode(xedd, op, XED_MAX_INSTRUCTION_BYTES)) {
if (xedd->op.has_modrm && xedd->op.has_sib) {
for (i = 0; i < ARRAYLEN(kModrmPicks); ++i) {
for (j = 0; j < ARRAYLEN(kModrmPicks); ++j) {
memset(op, 0x55, 16);
n = strlen(kPrefixes[p]);
memcpy(op, kPrefixes[p], n);
op[n] = kOpMap0[o];
op[xedd->op.pos_modrm] = kModrmPicks[i];
op[xedd->op.pos_sib] = kModrmPicks[j];
xed_decoded_inst_zero_set_mode(xedd, XED_MACHINE_MODE_LONG_64);
if (!xed_instruction_length_decode(xedd, op,
XED_MAX_INSTRUCTION_BYTES)) {
WriteOp(fd, xedd);
}
}
}
} else if (xedd->op.has_modrm) {
for (i = 0; i < ARRAYLEN(kModrmPicks); ++i) {
memset(op, 0x55, 16);
n = strlen(kPrefixes[p]);
memcpy(op, kPrefixes[p], n);
op[n] = kOpMap0[o];
op[xedd->op.pos_modrm] = kModrmPicks[i];
xed_decoded_inst_zero_set_mode(xedd, XED_MACHINE_MODE_LONG_64);
if (!xed_instruction_length_decode(xedd, op,
XED_MAX_INSTRUCTION_BYTES)) {
WriteOp(fd, xedd);
}
}
} else {
WriteOp(fd, xedd);
}
}
}
}
close(fd);
system("as -o /tmp/ops.o /tmp/ops.s");
system("objdump -wd /tmp/ops.o |"
" grep -v data16 |"
" grep -v addr32 |"
" grep -v '(bad)' |"
" sed 's/^[ :[:xdigit:]]*//' |"
" sed 's/^[ :[:xdigit:]]*//' |"
" sed 's/[[:space:]]#.*$//' |"
" grep -v 'rex\\.' |"
" sort -u");
return 0;
}