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@@ -0,0 +1,481 @@
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+/*
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+ * Copyright (c) 2012 Wojtek Kaniewski <wojtekka@toxygen.net>
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a copy
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+ * of this software and associated documentation files (the "Software"), to
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+ * deal in the Software without restriction, including without limitation the
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+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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+ * sell copies of the Software, and to permit persons to whom the Software is
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+ * furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in
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+ * all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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+ * IN THE SOFTWARE.
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+ */
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+
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+#include <stdio.h>
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+#include <string.h>
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+
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+#define IMM_FORMAT "0x%x"
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+//#define IMM_FORMAT "%d"
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+#define ADDR_FORMAT "0x%x"
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+
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+static inline unsigned int rol(unsigned int value, unsigned int shift)
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+{
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+ shift &= 31;
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+
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+ return (value >> shift) | (value << (32 - shift));
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+}
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+
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+static inline const char *condition(unsigned int insn)
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+{
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+ const char *conditions[16] = { "eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc", "hi", "ls", "ge", "lt", "gt", "le", "", "nv" };
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+ return conditions[(insn >> 28) & 0x0f];
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+}
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+
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+static inline const char *register_name(unsigned int reg)
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+{
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+ const char *register_names[16] = { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "sp", "lr", "pc" };
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+ return register_names[reg & 0x0f];
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+}
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+
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+static const char *register_list(unsigned int list, char *buf, size_t buf_len)
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+{
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+ int i;
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+
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+ buf[0] = 0;
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+
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+ for (i = 0; i < 16; i++)
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+ {
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+ if ((list >> i) & 1)
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+ {
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+ snprintf(buf + strlen(buf), buf_len - strlen(buf), "%s%s", (buf[0] == 0) ? "" : ",", register_name(i));
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+ }
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+ }
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+
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+ return buf;
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+}
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+
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+static const char *shift(unsigned int insn, char *buf, size_t buf_len)
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+{
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+ unsigned int imm = (insn >> 7) & 0x1f;
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+ const char *rn = register_name(insn >> 8);
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+ unsigned int type = (insn >> 4) & 0x07;
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+
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+ switch (type)
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+ {
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+ case 0:
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+ snprintf(buf, buf_len, (imm != 0) ? ",lsl #%d" : "", imm);
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+ break;
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+ case 1:
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+ snprintf(buf, buf_len, ",lsl %s", rn);
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+ break;
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+ case 2:
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+ snprintf(buf, buf_len, ",lsr #%d", imm ? imm : 32);
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+ break;
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+ case 3:
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+ snprintf(buf, buf_len, ",lsr %s", rn);
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+ break;
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+ case 4:
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+ snprintf(buf, buf_len, ",asr #%d", imm ? imm : 32);
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+ break;
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+ case 5:
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+ snprintf(buf, buf_len, ",asr %s", rn);
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+ break;
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+ case 6:
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+ snprintf(buf, buf_len, (imm != 0) ? ",ror #%d" : ",rrx", imm);
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+ break;
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+ case 7:
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+ snprintf(buf, buf_len, ",ror %s", rn);
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+ break;
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+ }
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+
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+ return buf;
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+}
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+
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+static const char *immediate(unsigned int imm, int negative, int show_if_zero, char *buf, size_t buf_len)
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+{
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+ if (imm || show_if_zero)
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+ {
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+ snprintf(buf, buf_len, ",#%s" IMM_FORMAT, (negative) ? "-" : "", imm);
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+ return buf;
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+ }
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+
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+ return "";
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+}
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+
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+static int data_processing(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ unsigned int oper = (insn >> 21) & 15;
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+ const char *names[16] = { "and", "eor", "sub", "rsb", "add", "adc", "sbc", "rsc", "tst", "teq", "cmp", "cmn", "orr", "mov", "bic", "mvn" };
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+ const char *name;
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+ const char *s;
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+ unsigned int rd;
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+ unsigned int rn;
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+ int is_move = ((oper == 13) || (oper == 15));
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+ int is_test = ((oper >= 8) && (oper <= 11));
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+ char tmp_buf[64];
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+
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+ name = names[oper];
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+ s = ((insn >> 20) & 1) ? "s" : "";
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+ rn = (insn >> 16) & 15;
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+ rd = (insn >> 12) & 15;
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+
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+ /* mov r0,r0,r0 is a nop */
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+ if (insn == 0xe1a00000)
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+ {
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+ snprintf(buf, buf_len, "nop");
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+ return 1;
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+ }
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+
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+ /* mrs */
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+ if ((insn & 0x0fbf0fff) == 0x010f0000)
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+ {
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+ const char *psr = ((insn >> 22) & 1) ? "spsr" : "cpsr";
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+ const char *rd = register_name(insn >> 12);
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+
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+ snprintf(buf, buf_len, "mrs%s %s,%s", condition(insn), rd, psr);
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+
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+ return 1;
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+ }
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+
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+ /* msr flag only*/
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+ if ((insn & 0x0db0f000) == 0x0120f000)
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+ {
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+ const char *psr = ((insn >> 22) & 1) ? "spsr" : "cpsr";
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+ const char *suffix;
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+
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+ switch ((insn >> 16) & 15)
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+ {
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+ case 9:
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+ suffix = "";
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+ break;
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+ case 8:
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+ suffix = "_f";
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+ break;
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+ case 1:
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+ suffix = "_c";
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+ break;
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+ default:
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+ return 0;
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+ }
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+
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+ if ((insn >> 25) & 1)
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+ {
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+ unsigned int imm = rol(insn & 0x000000ff, ((insn >> 8) & 15) * 2);
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+
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+ snprintf(buf, buf_len, "msr%s %s%s,#" IMM_FORMAT, condition(insn), psr, suffix, imm);
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+ }
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+ else
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+ {
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+ const char *rm = register_name(insn >> 0);
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+
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+ if (((insn >> 4) & 255) != 0)
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+ {
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+ return 0;
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+ }
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+
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+ snprintf(buf, buf_len, "msr%s %s%s,%s", condition(insn), psr, suffix, rm);
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+ }
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+
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+ return 1;
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+ }
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+
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+ if (((insn >> 25) & 1) == 0)
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+ {
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+ unsigned int rm;
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+
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+ rm = (insn & 15);
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+
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+ if (is_move)
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+ {
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+ snprintf(buf, buf_len, "%s%s%s %s,%s%s", name, condition(insn), s, register_name(rd), register_name(rm), shift(insn, tmp_buf, sizeof(tmp_buf)));
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+ }
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+ else if (is_test)
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+ {
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+ snprintf(buf, buf_len, "%s%s %s,%s%s", name, condition(insn), register_name(rn), register_name(rm), shift(insn, tmp_buf, sizeof(tmp_buf)));
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+ }
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+ else
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+ {
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+ snprintf(buf, buf_len, "%s%s%s %s,%s,%s%s", name, condition(insn), s, register_name(rd), register_name(rn), register_name(rm), shift(insn, tmp_buf, sizeof(tmp_buf)));
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+ }
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+ }
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+ else
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+ {
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+ unsigned int imm;
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+
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+ imm = rol(insn & 0x000000ff, ((insn >> 8) & 15) * 2);
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+
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+ if (is_move)
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+ {
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+ snprintf(buf, buf_len, "%s%s%s %s%s", name, condition(insn), s, register_name(rd), immediate(imm, 0, 1, tmp_buf, sizeof(tmp_buf)));
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+ }
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+ else if (is_test)
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+ {
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+ snprintf(buf, buf_len, "%s%s %s%s", name, condition(insn), register_name(rn), immediate(imm, 0, 1, tmp_buf, sizeof(tmp_buf)));
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+ }
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+ else
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+ {
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+ snprintf(buf, buf_len, "%s%s%s %s,%s%s", name, condition(insn), s, register_name(rd), register_name(rn), immediate(imm, 0, 1, tmp_buf, sizeof(tmp_buf)));
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+ }
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+ }
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+
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+ return 1;
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+}
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+
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+static int branch(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *link = ((insn >> 24) & 1) ? "l" : "";
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+ unsigned int address;
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+ unsigned int offset;
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+
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+ offset = insn & 0x00ffffff;
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+
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+ if ((offset & 0x00800000) != 0)
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+ {
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+ offset |= 0xff000000;
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+ }
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+
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+ address = pc + 8 + (offset << 2);
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+
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+ snprintf(buf, buf_len, "b%s%s " ADDR_FORMAT, link, condition(insn), address);
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+
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+ return 1;
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+}
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+
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+static int multiply(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *rd = register_name(insn >> 16);
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+ const char *rn = register_name(insn >> 12);
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+ const char *rs = register_name(insn >> 8);
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+ const char *rm = register_name(insn >> 0);
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+ const char *s = ((insn >> 20) & 1) ? "s" : "";
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+ int mla = (insn >> 21) & 1;
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+
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+ snprintf(buf, buf_len, (mla) ? "mla%s%s %s,%s,%s,%s" : "mul%s%s %s,%s,%s", condition(insn), s, rd, rm, rs, rn);
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+
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+ return 1;
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+}
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+
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+static int multiply_long(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *rh = register_name(insn >> 16);
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+ const char *rl = register_name(insn >> 12);
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+ const char *rs = register_name(insn >> 8);
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+ const char *rm = register_name(insn >> 0);
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+ const char *u = ((insn >> 22) & 1) ? "s" : "u";
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+ const char *s = ((insn >> 20) & 1) ? "s" : "";
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+ const char *name = ((insn >> 21) & 1) ? "mlal" : "mull";
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+
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+ snprintf(buf, buf_len, "%s%s%s%s %s,%s,%s,%s", u, name, condition(insn), s, rl, rh, rm, rs);
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+
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+ return 1;
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+}
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+
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+static int single_data_swap(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *rn = register_name(insn >> 16);
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+ const char *rd = register_name(insn >> 12);
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+ const char *rm = register_name(insn >> 0);
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+ const char *b = ((insn >> 22) & 1) ? "b" : "";
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+
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+ snprintf(buf, buf_len, "swp%s%s %s,%s,[%s]", condition(insn), b, rd, rm, rn);
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+
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+ return 1;
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+}
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+
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+static int branch_and_exchange(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *rn = register_name(insn >> 0);
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+ const char *l = ((insn >> 5) & 1) ? "l" : "";
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+
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+ snprintf(buf, buf_len, "b%sx%s %s", l, condition(insn), rn);
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+
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+ return 1;
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+}
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+
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+static int halfword_data_transfer(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *rn = register_name(insn >> 16);
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+ const char *rd = register_name(insn >> 12);
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+ const char *name = ((insn >> 20) & 1) ? "ldr" : "str";
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+ const char *w = ((insn >> 21) & 1) ? "!" : "";
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+ int sign = (insn >> 23) & 1;
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+ int pre = (insn >> 24) & 1;
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+ const char *suffix = "";
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+ char tmp_buf[64];
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+
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+ switch ((insn >> 5) & 3)
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+ {
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+ case 0:
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+ name = "swp";
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+ break;
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+ case 1:
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+ suffix = "h";
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+ break;
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+ case 2:
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+ suffix = "sb";
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+ break;
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+ case 3:
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+ suffix = "sh";
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+ break;
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+ }
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+
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+ if ((insn >> 22) & 1)
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+ {
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+ unsigned int imm = ((insn >> 4) & 0xf0) | (insn & 0x0f);
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+
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+ snprintf(buf, buf_len, (pre) ? "%s%s%s %s,[%s%s]%s" : "%s%s%s %s,[%s],%s%s", name, condition(insn), suffix, rd, rn, immediate(imm, !sign, 0, tmp_buf, sizeof(tmp_buf)), w);
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+ }
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+ else
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+ {
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+ const char *rm = register_name(insn >> 0);
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+
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+ snprintf(buf, buf_len, (pre) ? "%s%s%s %s,[%s,%s%s]%s" : "%s%s%s %s,[%s],%s%s%s", name, condition(insn), suffix, rd, rn, sign ? "" : "-", rm, w);
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+ }
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+
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+ return 1;
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+}
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+
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+static int single_data_transfer(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *rn = register_name(insn >> 16);
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+ const char *rd = register_name(insn >> 12);
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+ const char *name = ((insn >> 20) & 1) ? "ldr" : "str";
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+ const char *w = ((insn >> 21) & 1) ? "!" : "";
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+ const char *b = ((insn >> 22) & 1) ? "b" : "";
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+ int sign = (insn >> 23) & 1;
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+ int pre = (insn >> 24) & 1;
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+ char tmp_buf[64];
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+
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+ if ((insn >> 25) & 1)
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+ {
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+ const char *rm = register_name(insn >> 0);
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+
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+ snprintf(buf, buf_len, (pre) ? "%s%s%s %s,[%s,%s%s%s]%s" : "%s%s%s %s,[%s],%s%s%s%s", name, condition(insn), b, rd, rn, sign ? "" : "-", rm, shift(insn, tmp_buf, sizeof(tmp_buf)), w);
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+ }
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+ else
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+ {
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+ unsigned int imm = insn & 0x00000fff;
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+
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+ snprintf(buf, buf_len, (pre) ? "%s%s%s %s,[%s%s]%s" : "%s%s%s %s,[%s]%s%s", name, condition(insn), b, rd, rn, immediate(imm, !sign, 0, tmp_buf, sizeof(tmp_buf)), w);
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+ }
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+
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+ return 1;
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+}
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+
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+static int block_data_transfer(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
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+{
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+ const char *s = ((insn >> 22) & 1) ? "^" : "";
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+ const char *w = ((insn >> 21) & 1) ? "!" : "";
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+ int load = (insn >> 20) & 1;
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+ const char *name = (load) ? "ldm" : "stm";
|
|
|
+ const char *ldm_stubs[4] = { "fa", "fd", "ea", "ed" };
|
|
|
+ const char *stm_stubs[4] = { "ed", "ea", "fd", "fa" };
|
|
|
+ int stub_idx = (insn >> 23) & 3;
|
|
|
+ const char *stub = (load) ? ldm_stubs[stub_idx] : stm_stubs[stub_idx];
|
|
|
+ char tmp_buf[64];
|
|
|
+
|
|
|
+ snprintf(buf, buf_len, "%s%s%s %s%s, {%s}%s", name, condition(insn), stub, register_name(insn >> 16), w, register_list(insn & 0xffff, tmp_buf, sizeof(tmp_buf)), s);
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+static int coprocessor_data_transfer(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
|
|
|
+{
|
|
|
+ const char *name = ((insn >> 20) & 1) ? "ldc" : "stc";
|
|
|
+ const char *rn = register_name(insn >> 16);
|
|
|
+ int sign = (insn >> 23) & 1;
|
|
|
+ const char *l = ((insn >> 22) & 1) ? "l" : "";
|
|
|
+ const char *w = ((insn >> 21) & 1) ? "!" : "";
|
|
|
+ int pre = (insn >> 24) & 1;
|
|
|
+ unsigned int cp = (insn >> 8) & 15;
|
|
|
+ unsigned int cd = (insn >> 12) & 15;
|
|
|
+ unsigned int imm = (insn >> 0) & 255;
|
|
|
+ char tmp_buf[64];
|
|
|
+
|
|
|
+ snprintf(buf, buf_len, (pre) ? "%s%s%s p%d,cr%d,[%s%s]%s" : "%s%s%s p%d,cr%d,[%s]%s%s", name, condition(insn), l, cp, cd, rn, immediate(imm, !sign, 0, tmp_buf, sizeof(tmp_buf)), w);
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+static int coprocessor_data_operation(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
|
|
|
+{
|
|
|
+ snprintf(buf, buf_len, "cdp%s p%d,%d,cr%d,cr%d,cr%d,{%d}", condition(insn), (insn >> 8) & 15, (insn >> 20) & 15, (insn >> 12) & 15, (insn >> 16) & 15, (insn >> 0) & 15, (insn >> 5) & 7);
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+static int coprocessor_register_transfer(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
|
|
|
+{
|
|
|
+ const char *name = ((insn >> 20) & 1) ? "mrc" : "mcr";
|
|
|
+ unsigned int cn = (insn >> 16) & 15;
|
|
|
+ const char *rd = register_name(insn >> 12);
|
|
|
+ unsigned int expr1 = (insn >> 21) & 7;
|
|
|
+ unsigned int expr2 = (insn >> 5) & 7;
|
|
|
+ unsigned int cp = (insn >> 8) & 15;
|
|
|
+ unsigned int cm = (insn >> 0) & 15;
|
|
|
+
|
|
|
+ snprintf(buf, buf_len, "%s%s p%d,%d,%s,cr%d,cr%d,{%d}", name, condition(insn), cp, expr1, rd, cn, cm, expr2);
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+static int software_interrupt(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
|
|
|
+{
|
|
|
+ snprintf(buf, buf_len, "swi%s %u", condition(insn), insn & 0x00ffffff);
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+int disarm(unsigned int pc, unsigned int insn, char *buf, size_t buf_len)
|
|
|
+{
|
|
|
+ if ((insn & 0x0fffffd0) == 0x012fff10)
|
|
|
+ return branch_and_exchange(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0fb00ff0) == 0x01000090)
|
|
|
+ return single_data_swap(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0fc000f0) == 0x00000090)
|
|
|
+ return multiply(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0f8000f0) == 0x00800090)
|
|
|
+ return multiply_long(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0f000010) == 0x0e000000)
|
|
|
+ return coprocessor_data_operation(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0f000010) == 0x0e000010)
|
|
|
+ return coprocessor_register_transfer(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0f000000) == 0x0f000000)
|
|
|
+ return software_interrupt(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0e000090) == 0x00000090)
|
|
|
+ return halfword_data_transfer(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0e000000) == 0x08000000)
|
|
|
+ return block_data_transfer(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0e000000) == 0x0a000000)
|
|
|
+ return branch(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0e000000) == 0x0c000000)
|
|
|
+ return coprocessor_data_transfer(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0c000000) == 0x00000000)
|
|
|
+ return data_processing(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ if ((insn & 0x0c000000) == 0x04000000)
|
|
|
+ return single_data_transfer(pc, insn, buf, buf_len);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|