208 lines
6.1 KiB
C
208 lines
6.1 KiB
C
/* udis86 - libudis86/syn.c
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*
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* Copyright (c) 2002-2013 Vivek Thampi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "types.h"
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#include "decode.h"
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#include "syn.h"
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#include "udint.h"
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/* -----------------------------------------------------------------------------
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* Intel Register Table - Order Matters (types.h)!
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* -----------------------------------------------------------------------------
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*/
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const char* ud_reg_tab[] =
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{
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"al", "cl", "dl", "bl",
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"ah", "ch", "dh", "bh",
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"spl", "bpl", "sil", "dil",
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"r8b", "r9b", "r10b", "r11b",
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"r12b", "r13b", "r14b", "r15b",
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"ax", "cx", "dx", "bx",
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"sp", "bp", "si", "di",
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"r8w", "r9w", "r10w", "r11w",
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"r12w", "r13w" , "r14w", "r15w",
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"eax", "ecx", "edx", "ebx",
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"esp", "ebp", "esi", "edi",
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"r8d", "r9d", "r10d", "r11d",
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"r12d", "r13d", "r14d", "r15d",
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"rax", "rcx", "rdx", "rbx",
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"rsp", "rbp", "rsi", "rdi",
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"r8", "r9", "r10", "r11",
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"r12", "r13", "r14", "r15",
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"es", "cs", "ss", "ds",
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"fs", "gs",
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"cr0", "cr1", "cr2", "cr3",
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"cr4", "cr5", "cr6", "cr7",
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"cr8", "cr9", "cr10", "cr11",
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"cr12", "cr13", "cr14", "cr15",
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"dr0", "dr1", "dr2", "dr3",
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"dr4", "dr5", "dr6", "dr7",
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"dr8", "dr9", "dr10", "dr11",
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"dr12", "dr13", "dr14", "dr15",
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"mm0", "mm1", "mm2", "mm3",
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"mm4", "mm5", "mm6", "mm7",
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"st0", "st1", "st2", "st3",
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"st4", "st5", "st6", "st7",
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"xmm0", "xmm1", "xmm2", "xmm3",
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"xmm4", "xmm5", "xmm6", "xmm7",
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"xmm8", "xmm9", "xmm10", "xmm11",
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"xmm12", "xmm13", "xmm14", "xmm15",
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"rip"
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};
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uint64_t
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ud_syn_rel_target(struct ud *u, struct ud_operand *opr)
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{
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const uint64_t trunc_mask = 0xffffffffffffffffull >> (64 - u->opr_mode);
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switch (opr->size) {
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case 8 : return (u->pc + opr->lval.sbyte) & trunc_mask;
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case 16: return (u->pc + opr->lval.sword) & trunc_mask;
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case 32: return (u->pc + opr->lval.sdword) & trunc_mask;
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default: UD_ASSERT(!"invalid relative offset size.");
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return 0ull;
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}
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}
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/*
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* asmprintf
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* Printf style function for printing translated assembly
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* output. Returns the number of characters written and
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* moves the buffer pointer forward. On an overflow,
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* returns a negative number and truncates the output.
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*/
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int
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ud_asmprintf(struct ud *u, const char *fmt, ...)
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{
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int ret;
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int avail;
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va_list ap;
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va_start(ap, fmt);
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avail = u->asm_buf_size - u->asm_buf_fill - 1 /* nullchar */;
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ret = vsnprintf((char*) u->asm_buf + u->asm_buf_fill, avail, fmt, ap);
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if (ret < 0 || ret > avail) {
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u->asm_buf_fill = u->asm_buf_size - 1;
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} else {
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u->asm_buf_fill += ret;
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}
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va_end(ap);
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return ret;
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}
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void
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ud_syn_print_addr(struct ud *u, uint64_t addr)
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{
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const char *name = NULL;
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if (u->sym_resolver) {
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int64_t offset = 0;
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name = u->sym_resolver(u, addr, &offset);
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if (name) {
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if (offset) {
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ud_asmprintf(u, "%s%+" FMT64 "d", name, offset);
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} else {
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ud_asmprintf(u, "%s", name);
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}
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return;
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}
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}
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ud_asmprintf(u, "0x%" FMT64 "x", addr);
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}
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void
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ud_syn_print_imm(struct ud* u, const struct ud_operand *op)
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{
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uint64_t v;
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if (op->_oprcode == OP_sI && op->size != u->opr_mode) {
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if (op->size == 8) {
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v = (int64_t)op->lval.sbyte;
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} else {
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UD_ASSERT(op->size == 32);
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v = (int64_t)op->lval.sdword;
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}
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if (u->opr_mode < 64) {
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v = v & ((1ull << u->opr_mode) - 1ull);
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}
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} else {
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switch (op->size) {
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case 8 : v = op->lval.ubyte; break;
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case 16: v = op->lval.uword; break;
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case 32: v = op->lval.udword; break;
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case 64: v = op->lval.uqword; break;
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default: UD_ASSERT(!"invalid offset"); v = 0; /* keep cc happy */
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}
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}
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ud_asmprintf(u, "0x%" FMT64 "x", v);
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}
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void
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ud_syn_print_mem_disp(struct ud* u, const struct ud_operand *op, int sign)
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{
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UD_ASSERT(op->offset != 0);
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if (op->base == UD_NONE && op->index == UD_NONE) {
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uint64_t v;
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UD_ASSERT(op->scale == UD_NONE && op->offset != 8);
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/* unsigned mem-offset */
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switch (op->offset) {
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case 16: v = op->lval.uword; break;
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case 32: v = op->lval.udword; break;
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case 64: v = op->lval.uqword; break;
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default: UD_ASSERT(!"invalid offset"); v = 0; /* keep cc happy */
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}
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ud_asmprintf(u, "0x%" FMT64 "x", v);
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} else {
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int64_t v;
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UD_ASSERT(op->offset != 64);
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switch (op->offset) {
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case 8 : v = op->lval.sbyte; break;
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case 16: v = op->lval.sword; break;
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case 32: v = op->lval.sdword; break;
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default: UD_ASSERT(!"invalid offset"); v = 0; /* keep cc happy */
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}
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if (v < 0) {
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ud_asmprintf(u, "-0x%" FMT64 "x", -v);
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} else if (v > 0) {
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ud_asmprintf(u, "%s0x%" FMT64 "x", sign? "+" : "", v);
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}
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}
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}
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/*
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vim: set ts=2 sw=2 expandtab
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*/
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