1/* udis86 - libudis86/syn.c
2 *
3 * Copyright (c) 2002-2013 Vivek Thampi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without modification,
7 * are permitted provided that the following conditions are met:
8 *
9 *     * Redistributions of source code must retain the above copyright notice,
10 *       this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above copyright notice,
12 *       this list of conditions and the following disclaimer in the documentation
13 *       and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26#include "types.h"
27#include "decode.h"
28#include "syn.h"
29#include "udint.h"
30
31/* -----------------------------------------------------------------------------
32 * Intel Register Table - Order Matters (types.h)!
33 * -----------------------------------------------------------------------------
34 */
35const char* ud_reg_tab[] =
36{
37  "al",   "cl",   "dl",   "bl",
38  "ah",   "ch",   "dh",   "bh",
39  "spl",  "bpl",    "sil",    "dil",
40  "r8b",  "r9b",    "r10b",   "r11b",
41  "r12b", "r13b",   "r14b",   "r15b",
42
43  "ax",   "cx",   "dx",   "bx",
44  "sp",   "bp",   "si",   "di",
45  "r8w",  "r9w",    "r10w",   "r11w",
46  "r12w", "r13w"  , "r14w",   "r15w",
47
48  "eax",  "ecx",    "edx",    "ebx",
49  "esp",  "ebp",    "esi",    "edi",
50  "r8d",  "r9d",    "r10d",   "r11d",
51  "r12d", "r13d",   "r14d",   "r15d",
52
53  "rax",  "rcx",    "rdx",    "rbx",
54  "rsp",  "rbp",    "rsi",    "rdi",
55  "r8",   "r9",   "r10",    "r11",
56  "r12",  "r13",    "r14",    "r15",
57
58  "es",   "cs",   "ss",   "ds",
59  "fs",   "gs",
60
61  "cr0",  "cr1",    "cr2",    "cr3",
62  "cr4",  "cr5",    "cr6",    "cr7",
63  "cr8",  "cr9",    "cr10",   "cr11",
64  "cr12", "cr13",   "cr14",   "cr15",
65
66  "dr0",  "dr1",    "dr2",    "dr3",
67  "dr4",  "dr5",    "dr6",    "dr7",
68  "dr8",  "dr9",    "dr10",   "dr11",
69  "dr12", "dr13",   "dr14",   "dr15",
70
71  "mm0",  "mm1",    "mm2",    "mm3",
72  "mm4",  "mm5",    "mm6",    "mm7",
73
74  "st0",  "st1",    "st2",    "st3",
75  "st4",  "st5",    "st6",    "st7",
76
77  "xmm0", "xmm1",   "xmm2",   "xmm3",
78  "xmm4", "xmm5",   "xmm6",   "xmm7",
79  "xmm8", "xmm9",   "xmm10",  "xmm11",
80  "xmm12",  "xmm13",  "xmm14",  "xmm15",
81
82  "rip"
83};
84
85
86uint64_t
87ud_syn_rel_target(struct ud *u, struct ud_operand *opr)
88{
89  const uint64_t trunc_mask = 0xffffffffffffffffull >> (64 - u->opr_mode);
90  switch (opr->size) {
91  case 8 : return (u->pc + opr->lval.sbyte)  & trunc_mask;
92  case 16: return (u->pc + opr->lval.sword)  & trunc_mask;
93  case 32: return (u->pc + opr->lval.sdword) & trunc_mask;
94  default: UD_ASSERT(!"invalid relative offset size.");
95  }
96}
97
98
99/*
100 * asmprintf
101 *    Printf style function for printing translated assembly
102 *    output. Returns the number of characters written and
103 *    moves the buffer pointer forward. On an overflow,
104 *    returns a negative number and truncates the output.
105 */
106int
107ud_asmprintf(struct ud *u, char *fmt, ...)
108{
109  int ret;
110  int avail;
111  va_list ap;
112  va_start(ap, fmt);
113  avail = u->asm_buf_size - u->asm_buf_fill - 1 /* nullchar */;
114  ret = vsnprintf((char*) u->asm_buf + u->asm_buf_fill, avail, fmt, ap);
115  if (ret < 0 || ret > avail) {
116      u->asm_buf_fill = u->asm_buf_size - 1;
117  } else {
118      u->asm_buf_fill += ret;
119  }
120  va_end(ap);
121  return ret;
122}
123
124
125void
126ud_syn_print_addr(struct ud *u, uint64_t addr)
127{
128  const char *name = NULL;
129  if (u->sym_resolver) {
130    int64_t offset = 0;
131    name = u->sym_resolver(u, addr, &offset);
132    if (name) {
133      if (offset) {
134        ud_asmprintf(u, "%s%+" FMT64 "d", name, offset);
135      } else {
136        ud_asmprintf(u, "%s", name);
137      }
138      return;
139    }
140  }
141  ud_asmprintf(u, "0x%" FMT64 "x", addr);
142}
143
144
145void
146ud_syn_print_imm(struct ud* u, const struct ud_operand *op)
147{
148  uint64_t v;
149  if (op->_oprcode == OP_sI && op->size != u->opr_mode) {
150    if (op->size == 8) {
151      v = (int64_t)op->lval.sbyte;
152    } else {
153      UD_ASSERT(op->size == 32);
154      v = (int64_t)op->lval.sdword;
155    }
156    if (u->opr_mode < 64) {
157      v = v & ((1ull << u->opr_mode) - 1ull);
158    }
159  } else {
160    switch (op->size) {
161    case 8 : v = op->lval.ubyte;  break;
162    case 16: v = op->lval.uword;  break;
163    case 32: v = op->lval.udword; break;
164    case 64: v = op->lval.uqword; break;
165    default: UD_ASSERT(!"invalid offset"); v = 0; /* keep cc happy */
166    }
167  }
168  ud_asmprintf(u, "0x%" FMT64 "x", v);
169}
170
171
172void
173ud_syn_print_mem_disp(struct ud* u, const struct ud_operand *op, int sign)
174{
175  UD_ASSERT(op->offset != 0);
176 if (op->base == UD_NONE && op->index == UD_NONE) {
177    uint64_t v;
178    UD_ASSERT(op->scale == UD_NONE && op->offset != 8);
179    /* unsigned mem-offset */
180    switch (op->offset) {
181    case 16: v = op->lval.uword;  break;
182    case 32: v = op->lval.udword; break;
183    case 64: v = op->lval.uqword; break;
184    default: UD_ASSERT(!"invalid offset"); v = 0; /* keep cc happy */
185    }
186    ud_asmprintf(u, "0x%" FMT64 "x", v);
187  } else {
188    int64_t v;
189    UD_ASSERT(op->offset != 64);
190    switch (op->offset) {
191    case 8 : v = op->lval.sbyte;  break;
192    case 16: v = op->lval.sword;  break;
193    case 32: v = op->lval.sdword; break;
194    default: UD_ASSERT(!"invalid offset"); v = 0; /* keep cc happy */
195    }
196    if (v < 0) {
197      ud_asmprintf(u, "-0x%" FMT64 "x", -v);
198    } else if (v > 0) {
199      ud_asmprintf(u, "%s0x%" FMT64 "x", sign? "+" : "", v);
200    }
201  }
202}
203
204/*
205vim: set ts=2 sw=2 expandtab
206*/
207