90 lines
3.4 KiB
C
90 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/xed/x86.h"
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#include "tool/build/lib/address.h"
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#include "tool/build/lib/endian.h"
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#include "tool/build/lib/modrm.h"
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#include "tool/build/lib/throw.h"
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uint64_t AddressOb(struct Machine *m, uint32_t rde) {
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return AddSegment(m, rde, m->xedd->op.disp, m->ds);
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}
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uint8_t *GetSegment(struct Machine *m, uint32_t rde, int s) {
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switch (s & 7) {
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case 0:
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return m->es;
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case 1:
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return m->cs;
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case 2:
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return m->ss;
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case 3:
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return m->ds;
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case 4:
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return m->fs;
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case 5:
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return m->gs;
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case 6:
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case 7:
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OpUd(m, rde);
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default:
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unreachable;
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}
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}
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uint64_t AddSegment(struct Machine *m, uint32_t rde, uint64_t i, uint8_t s[8]) {
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if (!Sego(rde)) {
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return i + Read64(s);
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} else {
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return i + Read64(GetSegment(m, rde, Sego(rde) - 1));
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}
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}
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uint64_t DataSegment(struct Machine *m, uint32_t rde, uint64_t i) {
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return AddSegment(m, rde, i, m->ds);
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}
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uint64_t AddressSi(struct Machine *m, uint32_t rde) {
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switch (Eamode(rde)) {
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case XED_MODE_LONG:
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return DataSegment(m, rde, Read64(m->si));
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case XED_MODE_REAL:
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return DataSegment(m, rde, Read16(m->si));
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case XED_MODE_LEGACY:
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return DataSegment(m, rde, Read32(m->si));
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default:
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unreachable;
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}
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}
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uint64_t AddressDi(struct Machine *m, uint32_t rde) {
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uint64_t i = Read64(m->es);
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switch (Eamode(rde)) {
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case XED_MODE_LONG:
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return i + Read64(m->di);
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case XED_MODE_REAL:
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return i + Read16(m->di);
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case XED_MODE_LEGACY:
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return i + Read32(m->di);
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default:
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unreachable;
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}
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}
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