Imported a copy of libudis86 1.7.1

A robust disassembler capable of disassembling most (all?) of the 32bit & 64bit Intel assembler instructions. The plan is to use this instead of our home-grown (and incomplete) disassembler.
markmentovai · Aug 21, 2013 · b20fdef · b20fdef
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diff --git a/libudis86/decode.c b/libudis86/decode.c
diff --git a/libudis86/decode.h b/libudis86/decode.h
@@ -0,0 +1,195 @@
+/* udis86 - libudis86/decode.h
+ *
+ * Copyright (c) 2002-2009 Vivek Thampi
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ * 
+ *     * Redistributions of source code must retain the above copyright notice, 
+ *       this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright notice, 
+ *       this list of conditions and the following disclaimer in the documentation 
+ *       and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef UD_DECODE_H
+#define UD_DECODE_H
+
+#include "types.h"
+#include "itab.h"
+
+#define MAX_INSN_LENGTH 15
+
+/* itab prefix bits */
+#define P_none          ( 0 )
+#define P_cast          ( 1 << 0 )
+#define P_CAST(n)       ( ( n >> 0 ) & 1 )
+#define P_rexb          ( 1 << 1 )
+#define P_REXB(n)       ( ( n >> 1 ) & 1 )
+#define P_inv64         ( 1 << 4 )
+#define P_INV64(n)      ( ( n >> 4 ) & 1 )
+#define P_rexw          ( 1 << 5 )
+#define P_REXW(n)       ( ( n >> 5 ) & 1 )
+#define P_def64         ( 1 << 7 )
+#define P_DEF64(n)      ( ( n >> 7 ) & 1 )
+#define P_rexr          ( 1 << 8 )
+#define P_REXR(n)       ( ( n >> 8 ) & 1 )
+#define P_oso           ( 1 << 9 )
+#define P_OSO(n)        ( ( n >> 9 ) & 1 )
+#define P_aso           ( 1 << 10 )
+#define P_ASO(n)        ( ( n >> 10 ) & 1 )
+#define P_rexx          ( 1 << 11 )
+#define P_REXX(n)       ( ( n >> 11 ) & 1 )
+#define P_ImpAddr       ( 1 << 12 )
+#define P_IMPADDR(n)    ( ( n >> 12 ) & 1 )
+#define P_seg           ( 1 << 13 )
+#define P_SEG(n)        ( ( n >> 13 ) & 1 )
+#define P_str           ( 1 << 14 )
+#define P_STR(n)        ( ( n >> 14 ) & 1 )
+#define P_strz          ( 1 << 15 )
+#define P_STR_ZF(n)     ( ( n >> 15 ) & 1 )
+
+/* operand type constants -- order is important! */
+
+enum ud_operand_code {
+    OP_NONE,
+
+    OP_A,      OP_E,      OP_M,       OP_G,       
+    OP_I,      OP_F,
+
+    OP_R0,     OP_R1,     OP_R2,      OP_R3,
+    OP_R4,     OP_R5,     OP_R6,      OP_R7,
+
+    OP_AL,     OP_CL,     OP_DL,
+    OP_AX,     OP_CX,     OP_DX,
+    OP_eAX,    OP_eCX,    OP_eDX,
+    OP_rAX,    OP_rCX,    OP_rDX,
+
+    OP_ES,     OP_CS,     OP_SS,      OP_DS,  
+    OP_FS,     OP_GS,
+
+    OP_ST0,    OP_ST1,    OP_ST2,     OP_ST3,
+    OP_ST4,    OP_ST5,    OP_ST6,     OP_ST7,
+
+    OP_J,      OP_S,      OP_O,          
+    OP_I1,     OP_I3,     OP_sI,
+
+    OP_V,      OP_W,      OP_Q,       OP_P, 
+    OP_U,      OP_N,      OP_MU,
+
+    OP_R,      OP_C,      OP_D,       
+
+    OP_MR
+} UD_ATTR_PACKED;
+
+
+/* operand size constants */
+
+enum ud_operand_size {
+    SZ_NA  = 0,
+    SZ_Z   = 1,
+    SZ_V   = 2,
+    SZ_RDQ = 7,
+
+    /* the following values are used as is,
+     * and thus hard-coded. changing them 
+     * will break internals 
+     */
+    SZ_B   = 8,
+    SZ_W   = 16,
+    SZ_D   = 32,
+    SZ_Q   = 64,
+    SZ_T   = 80,
+    SZ_O   = 128,
+
+    SZ_Y   = 17,
+
+    /*
+     * complex size types, that encode sizes for operands
+     * of type MR (memory or register), for internal use
+     * only. Id space 256 and above.
+     */
+    SZ_BD  = (SZ_B << 8) | SZ_D,
+    SZ_BV  = (SZ_B << 8) | SZ_V,
+    SZ_WD  = (SZ_W << 8) | SZ_D,
+    SZ_WV  = (SZ_W << 8) | SZ_V,
+    SZ_WY  = (SZ_W << 8) | SZ_Y,
+    SZ_DY  = (SZ_D << 8) | SZ_Y,
+    SZ_WO  = (SZ_W << 8) | SZ_O,
+    SZ_DO  = (SZ_D << 8) | SZ_O,
+    SZ_QO  = (SZ_Q << 8) | SZ_O,
+
+} UD_ATTR_PACKED;
+
+
+/* resolve complex size type.
+ */
+static inline enum ud_operand_size
+Mx_mem_size(enum ud_operand_size size)
+{
+    return (size >> 8) & 0xff;
+}
+
+static inline enum ud_operand_size
+Mx_reg_size(enum ud_operand_size size)
+{
+    return size & 0xff;
+}
+
+/* A single operand of an entry in the instruction table. 
+ * (internal use only)
+ */
+struct ud_itab_entry_operand 
+{
+  enum ud_operand_code type;
+  enum ud_operand_size size;
+};
+
+
+/* A single entry in an instruction table. 
+ *(internal use only)
+ */
+struct ud_itab_entry 
+{
+  enum ud_mnemonic_code         mnemonic;
+  struct ud_itab_entry_operand  operand1;
+  struct ud_itab_entry_operand  operand2;
+  struct ud_itab_entry_operand  operand3;
+  uint32_t                      prefix;
+};
+
+struct ud_lookup_table_list_entry {
+    const uint16_t *table;
+    enum ud_table_type type;
+    const char *meta;
+};
+
+
+
+static inline int
+ud_opcode_field_sext(uint8_t primary_opcode)
+{
+  return (primary_opcode & 0x02) != 0;
+}
+
+extern struct ud_itab_entry ud_itab[];
+extern struct ud_lookup_table_list_entry ud_lookup_table_list[];
+
+#endif /* UD_DECODE_H */
+
+/* vim:cindent
+ * vim:expandtab
+ * vim:ts=4
+ * vim:sw=4
+ */
diff --git a/libudis86/extern.h b/libudis86/extern.h
@@ -0,0 +1,103 @@
+/* udis86 - libudis86/extern.h
+ *
+ * Copyright (c) 2002-2009, 2013 Vivek Thampi
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ * 
+ *     * Redistributions of source code must retain the above copyright notice, 
+ *       this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright notice, 
+ *       this list of conditions and the following disclaimer in the documentation 
+ *       and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef UD_EXTERN_H
+#define UD_EXTERN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "types.h"
+
+/* ============================= PUBLIC API ================================= */
+
+extern void ud_init(struct ud*);
+
+extern void ud_set_mode(struct ud*, uint8_t);
+
+extern void ud_set_pc(struct ud*, uint64_t);
+
+extern void ud_set_input_hook(struct ud*, int (*)(struct ud*));
+
+extern void ud_set_input_buffer(struct ud*, const uint8_t*, size_t);
+
+#ifndef __UD_STANDALONE__
+extern void ud_set_input_file(struct ud*, FILE*);
+#endif /* __UD_STANDALONE__ */
+
+extern void ud_set_vendor(struct ud*, unsigned);
+
+extern void ud_set_syntax(struct ud*, void (*)(struct ud*));
+
+extern void ud_input_skip(struct ud*, size_t);
+
+extern int ud_input_end(const struct ud*);
+
+extern unsigned int ud_decode(struct ud*);
+
+extern unsigned int ud_disassemble(struct ud*);
+
+extern void ud_translate_intel(struct ud*);
+
+extern void ud_translate_att(struct ud*);
+
+extern const char* ud_insn_asm(const struct ud* u);
+
+extern const uint8_t* ud_insn_ptr(const struct ud* u);
+
+extern uint64_t ud_insn_off(const struct ud*);
+
+extern const char* ud_insn_hex(struct ud*);
+
+extern unsigned int ud_insn_len(const struct ud* u);
+
+extern const struct ud_operand* ud_insn_opr(const struct ud *u, unsigned int n);
+
+extern int ud_opr_is_sreg(const struct ud_operand *opr);
+
+extern int ud_opr_isgpr(const struct ud_operand *opr);
+
+extern const char* ud_lookup_mnemonic(enum ud_mnemonic_code c);
+
+extern void ud_set_user_opaque_data(struct ud*, void*);
+
+extern void* ud_get_user_opaque_data(const struct ud*);
+
+extern uint64_t ud_insn_sext_imm(const struct ud*, const struct ud_operand*);
+
+extern void ud_set_asm_buffer(struct ud *u, char *buf, size_t size);
+
+extern void ud_set_sym_resolver(struct ud *u, 
+                                const char* (*resolver)(struct ud*, 
+                                                        uint64_t addr,
+                                                        int64_t *offset));
+
+/* ========================================================================== */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* UD_EXTERN_H */