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89 lines
3.4 KiB
89 lines
3.4 KiB
/*-*- 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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