| /* udis86 - libudis86/udis86.c |
| * |
| * Copyright (c) 2002-2013 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. |
| */ |
| |
| #include "input.h" |
| #include "extern.h" |
| #include "decode.h" |
| |
| #if !defined(__UD_STANDALONE__) |
| # if HAVE_STRING_H |
| # include <string.h> |
| # endif |
| #endif /* !__UD_STANDALONE__ */ |
| |
| /* ============================================================================= |
| * ud_init() - Initializes ud_t object. |
| * ============================================================================= |
| */ |
| extern void |
| ud_init(struct ud* u) |
| { |
| memset((void*)u, 0, sizeof(struct ud)); |
| ud_set_mode(u, 16); |
| u->mnemonic = UD_Iinvalid; |
| ud_set_pc(u, 0); |
| #ifndef __UD_STANDALONE__ |
| ud_set_input_file(u, stdin); |
| #endif /* __UD_STANDALONE__ */ |
| |
| ud_set_asm_buffer(u, u->asm_buf_int, sizeof(u->asm_buf_int)); |
| } |
| |
| /* ============================================================================= |
| * ud_disassemble() - disassembles one instruction and returns the number of |
| * bytes disassembled. A zero means end of disassembly. |
| * ============================================================================= |
| */ |
| extern unsigned int |
| ud_disassemble(struct ud* u) |
| { |
| if (ud_input_end(u)) |
| return 0; |
| |
| u->asm_buf[0] = 0; |
| |
| if (ud_decode(u) == 0) |
| return 0; |
| if (u->translator) |
| u->translator(u); |
| return ud_insn_len(u); |
| } |
| |
| /* ============================================================================= |
| * ud_set_mode() - Set Disassemly Mode. |
| * ============================================================================= |
| */ |
| extern void |
| ud_set_mode(struct ud* u, uint8_t m) |
| { |
| switch(m) { |
| case 16: |
| case 32: |
| case 64: u->dis_mode = m ; return; |
| default: u->dis_mode = 16; return; |
| } |
| } |
| |
| /* ============================================================================= |
| * ud_set_vendor() - Set vendor. |
| * ============================================================================= |
| */ |
| extern void |
| ud_set_vendor(struct ud* u, unsigned v) |
| { |
| switch(v) { |
| case UD_VENDOR_INTEL: |
| u->vendor = v; |
| break; |
| case UD_VENDOR_ANY: |
| u->vendor = v; |
| break; |
| default: |
| u->vendor = UD_VENDOR_AMD; |
| } |
| } |
| |
| /* ============================================================================= |
| * ud_set_pc() - Sets code origin. |
| * ============================================================================= |
| */ |
| extern void |
| ud_set_pc(struct ud* u, uint64_t o) |
| { |
| u->pc = o; |
| } |
| |
| /* ============================================================================= |
| * ud_set_syntax() - Sets the output syntax. |
| * ============================================================================= |
| */ |
| extern void |
| ud_set_syntax(struct ud* u, void (*t)(struct ud*)) |
| { |
| u->translator = t; |
| } |
| |
| /* ============================================================================= |
| * ud_insn() - returns the disassembled instruction |
| * ============================================================================= |
| */ |
| const char* |
| ud_insn_asm(const struct ud* u) |
| { |
| return u->asm_buf; |
| } |
| |
| /* ============================================================================= |
| * ud_insn_offset() - Returns the offset. |
| * ============================================================================= |
| */ |
| uint64_t |
| ud_insn_off(const struct ud* u) |
| { |
| return u->insn_offset; |
| } |
| |
| |
| /* ============================================================================= |
| * ud_insn_hex() - Returns hex form of disassembled instruction. |
| * ============================================================================= |
| */ |
| const char* |
| ud_insn_hex(struct ud* u) |
| { |
| u->insn_hexcode[0] = 0; |
| if (!u->error) { |
| unsigned int i; |
| unsigned char *src_ptr = inp_sess(u); |
| char* src_hex; |
| src_hex = (char*) u->insn_hexcode; |
| /* for each byte used to decode instruction */ |
| for (i = 0; i < u->inp_ctr && i < sizeof(u->insn_hexcode) / 2; |
| ++i, ++src_ptr) { |
| sprintf(src_hex, "%02x", *src_ptr & 0xFF); |
| src_hex += 2; |
| } |
| } |
| return u->insn_hexcode; |
| } |
| |
| |
| /* ============================================================================= |
| * ud_insn_ptr() - Returns code disassembled. |
| * ============================================================================= |
| */ |
| extern const uint8_t* |
| ud_insn_ptr(const struct ud* u) |
| { |
| return u->inp_sess; |
| } |
| |
| /* ============================================================================= |
| * ud_insn_len() - Returns the count of bytes disassembled. |
| * ============================================================================= |
| */ |
| extern unsigned int |
| ud_insn_len(const struct ud* u) |
| { |
| return u->inp_ctr; |
| } |
| |
| |
| /* ============================================================================= |
| * ud_insn_get_opr |
| * Return the operand struct representing the nth operand of |
| * the currently disassembled instruction. Returns NULL if |
| * there's no such operand. |
| * ============================================================================= |
| */ |
| const struct ud_operand* |
| ud_insn_opr(const struct ud *u, unsigned int n) |
| { |
| if (n > 2 || u->operand[n].type == UD_NONE) { |
| return NULL; |
| } else { |
| return &u->operand[n]; |
| } |
| } |
| |
| |
| /* ============================================================================= |
| * ud_opr_is_sreg |
| * Returns non-zero if the given operand is of a segment register type. |
| * ============================================================================= |
| */ |
| int |
| ud_opr_is_sreg(const struct ud_operand *opr) |
| { |
| return opr->type == UD_OP_REG && |
| opr->base >= UD_R_ES && |
| opr->base <= UD_R_GS; |
| } |
| |
| |
| /* ============================================================================= |
| * ud_opr_is_sreg |
| * Returns non-zero if the given operand is of a general purpose |
| * register type. |
| * ============================================================================= |
| */ |
| int |
| ud_opr_is_gpr(const struct ud_operand *opr) |
| { |
| return opr->type == UD_OP_REG && |
| opr->base >= UD_R_AL && |
| opr->base <= UD_R_R15; |
| } |
| |
| |
| /* ============================================================================= |
| * ud_set_user_opaque_data |
| * ud_get_user_opaque_data |
| * Get/set user opaqute data pointer |
| * ============================================================================= |
| */ |
| void |
| ud_set_user_opaque_data(struct ud * u, void* opaque) |
| { |
| u->user_opaque_data = opaque; |
| } |
| |
| void* |
| ud_get_user_opaque_data(const struct ud *u) |
| { |
| return u->user_opaque_data; |
| } |
| |
| |
| /* ============================================================================= |
| * ud_set_asm_buffer |
| * Allow the user to set an assembler output buffer. If `buf` is NULL, |
| * we switch back to the internal buffer. |
| * ============================================================================= |
| */ |
| void |
| ud_set_asm_buffer(struct ud *u, char *buf, size_t size) |
| { |
| if (buf == NULL) { |
| ud_set_asm_buffer(u, u->asm_buf_int, sizeof(u->asm_buf_int)); |
| } else { |
| u->asm_buf = buf; |
| u->asm_buf_size = size; |
| } |
| } |
| |
| |
| /* ============================================================================= |
| * ud_set_sym_resolver |
| * Set symbol resolver for relative targets used in the translation |
| * phase. |
| * |
| * The resolver is a function that takes a uint64_t address and returns a |
| * symbolic name for the that address. The function also takes a second |
| * argument pointing to an integer that the client can optionally set to a |
| * non-zero value for offsetted targets. (symbol+offset) The function may |
| * also return NULL, in which case the translator only prints the target |
| * address. |
| * |
| * The function pointer maybe NULL which resets symbol resolution. |
| * ============================================================================= |
| */ |
| void |
| ud_set_sym_resolver(struct ud *u, const char* (*resolver)(struct ud*, |
| uint64_t addr, |
| int64_t *offset)) |
| { |
| u->sym_resolver = resolver; |
| } |
| |
| /* |
| vim:set ts=2 sw=2 expandtab |
| */ |