Add new ARM disassembler plugin based on winedbg (arm_winedbg)

This commit is contained in:
Roi Martin (@nibble_ds) 2012-08-07 22:17:14 +02:00
parent 3c967ac89b
commit 059594e7a9
7 changed files with 911 additions and 1 deletions

View File

@ -0,0 +1,837 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "r_types.h"
#include "r_util.h"
#include "be_arm.h"
#define ARM_INSN_SIZE 4
#define THUMB_INSN_SIZE 2
#define THUMB2_INSN_SIZE 4
#define ROR32(n, r) (((n) >> (r)) | ((n) << (32 - (r))))
#define get_cond(ins) tbl_cond[(ins >> 28) & 0x0f]
#define get_nibble(ins, num) ((ins >> (num * 4)) & 0x0f)
static char const tbl_regs[][4] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
"fp", "ip", "sp", "lr", "pc", "cpsr"
};
static char const tbl_addrmode[][3] = {
"da", "ia", "db", "ib"
};
static char const tbl_cond[][3] = {
"eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc", "hi", "ls", "ge",
"lt", "gt", "le", "", ""
};
static char const tbl_dataops[][4] = {
"and", "eor", "sub", "rsb", "add", "adc", "sbc", "rsc", "tst", "teq",
"cmp", "cmn", "orr", "mov", "bic", "mvn"
};
static char const tbl_shifts[][4] = {
"lsl", "lsr", "asr", "ror"
};
static char const tbl_hiops_t[][4] = {
"add", "cmp", "mov", "bx"
};
static char const tbl_aluops_t[][4] = {
"and", "eor", "lsl", "lsr", "asr", "adc", "sbc", "ror", "tst", "neg",
"cmp", "cmn", "orr", "mul", "bic", "mvn"
};
static char const tbl_immops_t[][4] = {
"mov", "cmp", "add", "sub"
};
static char const tbl_sregops_t[][5] = {
"strh", "ldsb", "ldrh", "ldsh"
};
static ut32 db_get_inst(const ut8* buf, int size) {
ut32 result = 0;
switch (size) {
case 4:
result = *(ut32*)buf;
break;
case 2:
result = *(ut16*)buf;
break;
}
return result;
}
static ut32 arm_disasm_branch(struct arm_insn *arminsn, ut32 inst) {
short link = (inst >> 24) & 0x01;
int offset = (inst << 2) & 0x03ffffff;
if (offset & 0x02000000) offset |= 0xfc000000;
offset += 8;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "b%s%s %"PFMT64x, link ? "l" : "", get_cond(inst), arminsn->pc+offset);
return 0;
}
static ut32 arm_disasm_mul(struct arm_insn *arminsn, ut32 inst) {
short accu = (inst >> 21) & 0x01;
short condcodes = (inst >> 20) & 0x01;
if (accu)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "mla%s%s %s, %s, %s, %s", get_cond(inst), condcodes ? "s" : "",
tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)],
tbl_regs[get_nibble(inst, 2)], tbl_regs[get_nibble(inst, 3)]);
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "mul%s%s %s, %s, %s", get_cond(inst), condcodes ? "s" : "",
tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)],
tbl_regs[get_nibble(inst, 2)]);
return 0;
}
static ut32 arm_disasm_longmul(struct arm_insn *arminsn, ut32 inst) {
short sign = (inst >> 22) & 0x01;
short accu = (inst >> 21) & 0x01;
short condcodes = (inst >> 20) & 0x01;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s%s%s %s, %s, %s, %s", sign ? "s" : "u", accu ? "mlal" : "mull",
get_cond(inst), condcodes ? "s" : "",
tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)], tbl_regs[get_nibble(inst, 2)]);
return 0;
}
static ut32 arm_disasm_swp(struct arm_insn *arminsn, ut32 inst) {
short byte = (inst >> 22) & 0x01;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "swp%s%s %s, %s, [%s]", get_cond(inst), byte ? "b" : "",
tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 0)],
tbl_regs[get_nibble(inst, 4)]);
return 0;
}
static ut32 arm_disasm_branchreg(struct arm_insn *arminsn, ut32 inst) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "b%s %s", get_cond(inst), tbl_regs[get_nibble(inst, 0)]);
return 0;
}
static ut32 arm_disasm_branchxchg(struct arm_insn *arminsn, ut32 inst) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "bx%s %s", get_cond(inst), tbl_regs[get_nibble(inst, 0)]);
return 0;
}
static ut32 arm_disasm_mrstrans(struct arm_insn *arminsn, ut32 inst) {
short src = (inst >> 22) & 0x01;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "mrs%s %s, %s", get_cond(inst), tbl_regs[get_nibble(inst, 3)],
src ? "spsr" : "cpsr");
return 0;
}
static ut32 arm_disasm_msrtrans(struct arm_insn *arminsn, ut32 inst) {
short immediate = (inst >> 25) & 0x01;
short dst = (inst >> 22) & 0x01;
short simple = (inst >> 16) & 0x01;
if (simple || !immediate) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "msr%s %s, %s", get_cond(inst), dst ? "spsr" : "cpsr",
tbl_regs[get_nibble(inst, 0)]);
return 0;
}
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "msr%s %s, #%u", get_cond(inst), dst ? "spsr" : "cpsr",
ROR32(inst & 0xff, 2 * get_nibble(inst, 2)));
return 0;
}
static ut32 arm_disasm_wordmov(struct arm_insn *arminsn, ut32 inst) {
short top = (inst >> 22) & 0x01;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "mov%s%s %s, #%u", top ? "t" : "w", get_cond(inst),
tbl_regs[get_nibble(inst, 3)],
(get_nibble(inst, 4) << 12) | (inst & 0x0fff));
return 0;
}
static ut32 arm_disasm_nop(struct arm_insn *arminsn, ut32 inst) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "nop%s", get_cond(inst));
return 0;
}
static ut32 arm_disasm_dataprocessing(struct arm_insn *arminsn, ut32 inst) {
short condcodes = (inst >> 20) & 0x01;
short opcode = (inst >> 21) & 0x0f;
short immediate = (inst >> 25) & 0x01;
short no_op1 = (opcode & 0x0d) == 0x0d;
short no_dst = (opcode & 0x0c) == 0x08;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s%s", tbl_dataops[opcode], condcodes ? "s" : "", get_cond(inst));
if (!no_dst) arminsn->str_asm = r_str_concatf(arminsn->str_asm, " %s, ", tbl_regs[get_nibble(inst, 3)]);
else arminsn->str_asm = r_str_concatf(arminsn->str_asm, " ");
if (no_op1) {
if (immediate)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "#%u", ROR32(inst & 0xff, 2 * get_nibble(inst, 2)));
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s", tbl_regs[get_nibble(inst, 0)]);
} else {
if (immediate)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, #%u", tbl_regs[get_nibble(inst, 4)],
ROR32(inst & 0xff, 2 * get_nibble(inst, 2)));
else if (((inst >> 4) & 0xff) == 0x00) /* no shift */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, %s", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
else if (((inst >> 4) & 0x09) == 0x01) /* register shift */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, %s, %s %s", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)],
tbl_shifts[(inst >> 5) & 0x03], tbl_regs[(inst >> 8) & 0x0f]);
else if (((inst >> 4) & 0x01) == 0x00) /* immediate shift */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, %s, %s #%d", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)], tbl_shifts[(inst >> 5) & 0x03],
(inst >> 7) & 0x1f);
else
return inst;
}
return 0;
}
static ut32 arm_disasm_singletrans(struct arm_insn *arminsn, ut32 inst) {
short load = (inst >> 20) & 0x01;
short writeback = (inst >> 21) & 0x01;
short byte = (inst >> 22) & 0x01;
short direction = (inst >> 23) & 0x01;
short indexing = (inst >> 24) & 0x01;
short immediate = !((inst >> 25) & 0x01);
short offset = inst & 0x0fff;
if (!direction) offset *= -1;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s%s%s", load ? "ldr" : "str", byte ? "b" : "", writeback ? "t" : "",
get_cond(inst));
arminsn->str_asm = r_str_concatf(arminsn->str_asm, " %s, ", tbl_regs[get_nibble(inst, 3)]);
if (indexing) {
if (immediate)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s, #%d]", tbl_regs[get_nibble(inst, 4)], offset);
else if (((inst >> 4) & 0xff) == 0x00) /* no shift */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s, %s]", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
else if (((inst >> 4) & 0x01) == 0x00) /* immediate shift (there's no register shift) */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s, %s, %s #%d]", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)], tbl_shifts[(inst >> 5) & 0x03],
(inst >> 7) & 0x1f);
else
return inst;
} else {
if (immediate)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s], #%d", tbl_regs[get_nibble(inst, 4)], offset);
else if (((inst >> 4) & 0xff) == 0x00) /* no shift */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s], %s", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
else if (((inst >> 4) & 0x01) == 0x00) /* immediate shift (there's no register shift) */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s], %s, %s #%d", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)], tbl_shifts[(inst >> 5) & 0x03],
(inst >> 7) & 0x1f);
else
return inst;
}
return 0;
}
static ut32 arm_disasm_halfwordtrans(struct arm_insn *arminsn, ut32 inst) {
short halfword = (inst >> 5) & 0x01;
short sign = (inst >> 6) & 0x01;
short load = (inst >> 20) & 0x01;
short writeback = (inst >> 21) & 0x01;
short immediate = (inst >> 22) & 0x01;
short direction = (inst >> 23) & 0x01;
short indexing = (inst >> 24) & 0x01;
short offset = ((inst >> 4) & 0xf0) + (inst & 0x0f);
if (!direction) offset *= -1;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s%s%s%s", load ? "ldr" : "str", sign ? "s" : "",
halfword ? "h" : (sign ? "b" : ""), writeback ? "t" : "", get_cond(inst));
arminsn->str_asm = r_str_concatf(arminsn->str_asm, " %s, ", tbl_regs[get_nibble(inst, 3)]);
if (indexing) {
if (immediate)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s, #%d]", tbl_regs[get_nibble(inst, 4)], offset);
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s, %s]", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
} else {
if (immediate)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s], #%d", tbl_regs[get_nibble(inst, 4)], offset);
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "[%s], %s", tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
}
return 0;
}
static ut32 arm_disasm_blocktrans(struct arm_insn *arminsn, ut32 inst) {
short load = (inst >> 20) & 0x01;
short writeback = (inst >> 21) & 0x01;
short psr = (inst >> 22) & 0x01;
short addrmode = (inst >> 23) & 0x03;
short i;
short last=15;
for (i=15;i>=0;i--)
if ((inst>>i) & 1) {
last = i;
break;
}
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s%s %s%s, {", load ? "ldm" : "stm", tbl_addrmode[addrmode],
get_cond(inst), tbl_regs[get_nibble(inst, 4)], writeback ? "!" : "");
for (i=0;i<=15;i++)
if ((inst>>i) & 1) {
if (i == last) arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s", tbl_regs[i]);
else arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, ", tbl_regs[i]);
}
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "}%s", psr ? "^" : "");
return 0;
}
static ut32 arm_disasm_swi(struct arm_insn *arminsn, ut32 inst) {
ut32 comment = inst & 0x00ffffff;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "swi%s #%d", get_cond(inst), comment);
return 0;
}
static ut32 arm_disasm_coproctrans(struct arm_insn *arminsn, ut32 inst) {
ut16 CRm = inst & 0x0f;
ut16 CP = (inst >> 5) & 0x07;
ut16 CPnum = (inst >> 8) & 0x0f;
ut16 CRn = (inst >> 16) & 0x0f;
ut16 load = (inst >> 20) & 0x01;
ut16 CP_Opc = (inst >> 21) & 0x07;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s %u, %u, %s, cr%u, cr%u, {%u}", load ? "mrc" : "mcr",
get_cond(inst), CPnum, CP, tbl_regs[get_nibble(inst, 3)], CRn, CRm, CP_Opc);
return 0;
}
static ut32 arm_disasm_coprocdataop(struct arm_insn *arminsn, ut32 inst) {
ut16 CRm = inst & 0x0f;
ut16 CP = (inst >> 5) & 0x07;
ut16 CPnum = (inst >> 8) & 0x0f;
ut16 CRd = (inst >> 12) & 0x0f;
ut16 CRn = (inst >> 16) & 0x0f;
ut16 CP_Opc = (inst >> 20) & 0x0f;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "cdp%s %u, %u, cr%u, cr%u, cr%u, {%u}", get_cond(inst),
CPnum, CP, CRd, CRn, CRm, CP_Opc);
return 0;
}
static ut32 arm_disasm_coprocdatatrans(struct arm_insn *arminsn, ut32 inst) {
ut16 CPnum = (inst >> 8) & 0x0f;
ut16 CRd = (inst >> 12) & 0x0f;
ut16 load = (inst >> 20) & 0x01;
ut16 writeback = (inst >> 21) & 0x01;
ut16 translen = (inst >> 22) & 0x01;
ut16 direction = (inst >> 23) & 0x01;
ut16 indexing = (inst >> 24) & 0x01;
short offset = (inst & 0xff) << 2;
if (!direction) offset *= -1;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s%s", load ? "ldc" : "stc", translen ? "l" : "", get_cond(inst));
if (indexing)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, " %u, cr%u, [%s, #%d]%s", CPnum, CRd, tbl_regs[get_nibble(inst, 4)],
offset, writeback?"!":"");
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, " %u, cr%u, [%s], #%d", CPnum, CRd, tbl_regs[get_nibble(inst, 4)],
offset);
return 0;
}
static ut16 thumb_disasm_hireg(struct arm_insn *arminsn, ut16 inst) {
short dst = inst & 0x07;
short src = (inst >> 3) & 0x07;
short h2 = (inst >> 6) & 0x01;
short h1 = (inst >> 7) & 0x01;
short op = (inst >> 8) & 0x03;
if (h1) dst += 8;
if (h2) src += 8;
if (op == 2 && dst == src) { /* mov rx, rx */
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "nop");
return 0;
}
if (op == 3)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "b%sx %s", h1?"l":"", tbl_regs[src]);
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, %s", tbl_hiops_t[op], tbl_regs[dst], tbl_regs[src]);
return 0;
}
static ut16 thumb_disasm_aluop(struct arm_insn *arminsn, ut16 inst) {
short dst = inst & 0x07;
short src = (inst >> 3) & 0x07;
short op = (inst >> 6) & 0x0f;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, %s", tbl_aluops_t[op], tbl_regs[dst], tbl_regs[src]);
return 0;
}
static ut16 thumb_disasm_pushpop(struct arm_insn *arminsn, ut16 inst) {
short lrpc = (inst >> 8) & 0x01;
short load = (inst >> 11) & 0x01;
short i;
short last;
for (i=7;i>=0;i--)
if ((inst>>i) & 1) break;
last = i;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s {", load ? "pop" : "push");
for (i=0;i<=7;i++)
if ((inst>>i) & 1) {
if (i == last) arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s", tbl_regs[i]);
else arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, ", tbl_regs[i]);
}
if (lrpc)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s", last ? ", " : "", load ? "pc" : "lr");
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "}");
return 0;
}
static ut16 thumb_disasm_blocktrans(struct arm_insn *arminsn, ut16 inst) {
short load = (inst >> 11) & 0x01;
short i;
short last;
for (i=7;i>=0;i--)
if ((inst>>i) & 1) break;
last = i;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s!, {", load ? "ldmia" : "stmia", tbl_regs[(inst >> 8) & 0x07]);
for (i=0;i<=7;i++)
if ((inst>>i) & 1) {
if (i == last) arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s", tbl_regs[i]);
else arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, ", tbl_regs[i]);
}
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "}");
return 0;
}
static ut16 thumb_disasm_condbranch(struct arm_insn *arminsn, ut16 inst) {
ut16 offset = inst & 0x00ff;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "b%s %"PFMT64x, tbl_cond[(inst >> 8) & 0x0f], arminsn->pc+offset);
return 0;
}
static ut16 thumb_disasm_uncondbranch(struct arm_insn *arminsn, ut16 inst) {
short offset = (inst & 0x07ff) << 1;
if (offset & 0x0800) offset |= 0xf000;
offset += 4;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "b %"PFMT64x, arminsn->pc+offset);
return 0;
}
static ut16 thumb_disasm_loadadr(struct arm_insn *arminsn, ut16 inst) {
ut16 src = (inst >> 11) & 0x01;
ut16 offset = (inst & 0xff) << 2;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "add %s, %s, #%d", tbl_regs[(inst >> 8) & 0x07], src ? "sp" : "pc",
offset);
return 0;
}
static ut16 thumb_disasm_swi(struct arm_insn *arminsn, ut16 inst) {
ut16 comment = inst & 0x00ff;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "swi #%d", comment);
return 0;
}
static ut16 thumb_disasm_nop(struct arm_insn *arminsn, ut16 inst) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "nop");
return 0;
}
static ut16 thumb_disasm_ldrpcrel(struct arm_insn *arminsn, ut16 inst) {
ut16 offset = (inst & 0xff) << 2;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "ldr %s, [pc, #%u]", tbl_regs[(inst >> 8) & 0x07], offset);
return 0;
}
static ut16 thumb_disasm_ldrsprel(struct arm_insn *arminsn, ut16 inst) {
ut16 offset = (inst & 0xff) << 2;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, [sp, #%u]", (inst & 0x0800)?"ldr":"str",
tbl_regs[(inst >> 8) & 0x07], offset);
return 0;
}
static ut16 thumb_disasm_addsprel(struct arm_insn *arminsn, ut16 inst) {
ut16 offset = (inst & 0x7f) << 2;
if ((inst >> 7) & 0x01)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "sub sp, sp, #%u", offset);
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "add sp, sp, #%u", offset);
return 0;
}
static ut16 thumb_disasm_ldrimm(struct arm_insn *arminsn, ut16 inst) {
ut16 offset = (inst & 0x07c0) >> 6;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s %s, [%s, #%u]",
(inst & 0x0800)?"ldr":"str", (inst & 0x1000)?"b":"",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07],
(inst & 0x1000)?offset:(offset << 2));
return 0;
}
static ut16 thumb_disasm_ldrhimm(struct arm_insn *arminsn, ut16 inst) {
ut16 offset = (inst & 0x07c0) >> 5;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, [%s, #%u]", (inst & 0x0800)?"ldrh":"strh",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07], offset);
return 0;
}
static ut16 thumb_disasm_ldrreg(struct arm_insn *arminsn, ut16 inst) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s%s %s, [%s, %s]",
(inst & 0x0800)?"ldr":"str", (inst & 0x0400)?"b":"",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07],
tbl_regs[(inst >> 6) & 0x07]);
return 0;
}
static ut16 thumb_disasm_ldrsreg(struct arm_insn *arminsn, ut16 inst) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, [%s, %s]",
tbl_sregops_t[(inst >> 10) & 0x03], tbl_regs[inst & 0x07],
tbl_regs[(inst >> 3) & 0x07], tbl_regs[(inst >> 6) & 0x07]);
return 0;
}
static ut16 thumb_disasm_immop(struct arm_insn *arminsn, ut16 inst) {
ut16 op = (inst >> 11) & 0x03;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, #%u", tbl_immops_t[op], tbl_regs[(inst >> 8) & 0x07],
inst & 0xff);
return 0;
}
static ut16 thumb_disasm_addsub(struct arm_insn *arminsn, ut16 inst) {
ut16 op = (inst >> 9) & 0x01;
ut16 immediate = (inst >> 10) & 0x01;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, %s, ", op ? "sub" : "add",
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07]);
if (immediate)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "#%d", (inst >> 6) & 0x07);
else
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s", tbl_regs[(inst >> 6) & 0x07]);
return 0;
}
static ut16 thumb_disasm_movshift(struct arm_insn *arminsn, ut16 inst) {
ut16 op = (inst >> 11) & 0x03;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s %s, %s, #%u", tbl_shifts[op],
tbl_regs[inst & 0x07], tbl_regs[(inst >> 3) & 0x07], (inst >> 6) & 0x1f);
return 0;
}
static ut32 thumb2_disasm_branchlinked(struct arm_insn *arminsn, ut32 inst) {
ut32 offset = (((inst & 0x07ff0000) >> 4) | ((inst & 0x000007ff) << 1)) + 4;
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "bl %"PFMT64x, arminsn->pc+offset);
return 0;
}
static ut32 thumb2_disasm_misc(struct arm_insn *arminsn, ut32 inst) {
ut16 op1 = (inst >> 20) & 0x03;
ut16 op2 = (inst >> 4) & 0x03;
if (get_nibble(inst, 4) != get_nibble(inst, 0))
return inst;
if (op1 == 3 && op2 == 0) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "clz %s, %s ", tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 0)]);
return 0;
}
if (op1 == 1) {
switch (op2) {
case 0:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "rev ");
break;
case 1:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "rev16 ");
break;
case 2:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "rbit ");
break;
case 3:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "revsh ");
break;
}
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, %s ", tbl_regs[get_nibble(inst, 2)], tbl_regs[get_nibble(inst, 0)]);
return 0;
}
return inst;
}
static ut32 thumb2_disasm_mul(struct arm_insn *arminsn, ut32 inst) {
ut16 op1 = (inst >> 20) & 0x07;
ut16 op2 = (inst >> 4) & 0x03;
if (op1)
return inst;
if (op2 == 0 && get_nibble(inst, 3) != 0xf) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "mla %s, %s, %s, %s ", tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)],
tbl_regs[get_nibble(inst, 3)]);
return 0;
}
if (op2 == 0 && get_nibble(inst, 3) == 0xf) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "mul %s, %s, %s ", tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
return 0;
}
if (op2 == 1) {
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "mls %s, %s, %s, %s ", tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)],
tbl_regs[get_nibble(inst, 3)]);
return 0;
}
return inst;
}
static ut32 thumb2_disasm_longmuldiv(struct arm_insn *arminsn, ut32 inst) {
ut16 op1 = (inst >> 20) & 0x07;
ut16 op2 = (inst >> 4) & 0x0f;
if (op2 == 0) {
switch (op1) {
case 0:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "smull ");
break;
case 2:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "umull ");
break;
case 4:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "smlal ");
break;
case 6:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "umlal ");
break;
default:
return inst;
}
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, %s, %s, %s ",
tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 2)],
tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
return 0;
}
if (op2 == 0xffff) {
switch (op1) {
case 1:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "sdiv ");
break;
case 3:
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "udiv ");
break;
default:
return inst;
}
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "%s, %s, %s ", tbl_regs[get_nibble(inst, 2)], tbl_regs[get_nibble(inst, 4)],
tbl_regs[get_nibble(inst, 0)]);
return 0;
}
return inst;
}
struct inst_arm {
ut32 mask;
ut32 pattern;
ut32 (*func)(struct arm_insn*, ut32);
};
static const struct inst_arm tbl_arm[] = {
{ 0x0e000000, 0x0a000000, arm_disasm_branch },
{ 0x0fc000f0, 0x00000090, arm_disasm_mul },
{ 0x0f8000f0, 0x00800090, arm_disasm_longmul },
{ 0x0fb00ff0, 0x01000090, arm_disasm_swp },
{ 0x0e000090, 0x00000090, arm_disasm_halfwordtrans },
{ 0x0ffffff0, 0x012fff00, arm_disasm_branchreg },
{ 0x0ffffff0, 0x012fff10, arm_disasm_branchxchg },
{ 0x0fbf0fff, 0x010f0000, arm_disasm_mrstrans },
{ 0x0dbef000, 0x0128f000, arm_disasm_msrtrans },
{ 0x0fb00000, 0x03000000, arm_disasm_wordmov },
{ 0x0fffffff, 0x0320f000, arm_disasm_nop },
{ 0x0c000000, 0x00000000, arm_disasm_dataprocessing },
{ 0x0c000000, 0x04000000, arm_disasm_singletrans },
{ 0x0e000000, 0x08000000, arm_disasm_blocktrans },
{ 0x0f000000, 0x0f000000, arm_disasm_swi },
{ 0x0f000010, 0x0e000010, arm_disasm_coproctrans },
{ 0x0f000010, 0x0e000000, arm_disasm_coprocdataop },
{ 0x0e000000, 0x0c000000, arm_disasm_coprocdatatrans },
{ 0x00000000, 0x00000000, NULL }
};
struct inst_thumb16 {
ut16 mask;
ut16 pattern;
ut16 (*func)(struct arm_insn*, ut16);
};
static const struct inst_thumb16 tbl_thumb16[] = {
{ 0xfc00, 0x4400, thumb_disasm_hireg },
{ 0xfc00, 0x4000, thumb_disasm_aluop },
{ 0xf600, 0xb400, thumb_disasm_pushpop },
{ 0xf000, 0xc000, thumb_disasm_blocktrans },
{ 0xf000, 0xd000, thumb_disasm_condbranch },
{ 0xf800, 0xe000, thumb_disasm_uncondbranch },
{ 0xf000, 0xa000, thumb_disasm_loadadr },
{ 0xf800, 0x4800, thumb_disasm_ldrpcrel },
{ 0xf000, 0x9000, thumb_disasm_ldrsprel },
{ 0xff00, 0xb000, thumb_disasm_addsprel },
{ 0xe000, 0x6000, thumb_disasm_ldrimm },
{ 0xf000, 0x8000, thumb_disasm_ldrhimm },
{ 0xf200, 0x5000, thumb_disasm_ldrreg },
{ 0xf200, 0x5200, thumb_disasm_ldrsreg },
{ 0xe000, 0x2000, thumb_disasm_immop },
{ 0xff00, 0xdf00, thumb_disasm_swi },
{ 0xff00, 0xbf00, thumb_disasm_nop },
{ 0xf800, 0x1800, thumb_disasm_addsub },
{ 0xe000, 0x0000, thumb_disasm_movshift },
{ 0x0000, 0x0000, NULL }
};
static const struct inst_arm tbl_thumb32[] = {
{ 0xf800f800, 0xf000f800, thumb2_disasm_branchlinked },
{ 0xffc0f0c0, 0xfa80f080, thumb2_disasm_misc },
{ 0xff8000c0, 0xfb000000, thumb2_disasm_mul },
{ 0xff8000f0, 0xfb800000, thumb2_disasm_longmuldiv },
{ 0xff8000f0, 0xfb8000f0, thumb2_disasm_longmuldiv },
{ 0x00000000, 0x00000000, NULL }
};
void arm_set_pc(struct arm_insn *arminsn, ut64 pc) {
arminsn->pc = pc;
}
void arm_set_input_buffer(struct arm_insn *arminsn, const ut8 *buf) {
arminsn->buf = buf;
}
void arm_set_thumb(struct arm_insn *arminsn, int thumb) {
arminsn->thumb = thumb;
}
char* arm_insn_asm(struct arm_insn *arminsn) {
return arminsn->str_asm;
}
char* arm_insn_hex(struct arm_insn *arminsn) {
return arminsn->str_hex;
}
void* arm_free(struct arm_insn *arminsn) {
free(arminsn->str_hex);
free(arminsn->str_asm);
free(arminsn);
return NULL;
}
struct arm_insn* arm_new() {
struct arm_insn *ret;
ret = malloc(sizeof(struct arm_insn));
ret->pc = 0;
ret->thumb = R_FALSE;
ret->str_hex = NULL;
ret->str_asm = NULL;
return ret;
}
int arm_disasm_one_insn(struct arm_insn *arminsn) {
struct inst_arm *a_ptr = (struct inst_arm *)&tbl_arm;
struct inst_thumb16 *t_ptr = (struct inst_thumb16 *)&tbl_thumb16;
struct inst_arm *t2_ptr = (struct inst_arm *)&tbl_thumb32;
ut32 inst;
ut16 tinst;
int size;
int matched = 0;
if (!arminsn->thumb) {
size = ARM_INSN_SIZE;
inst = db_get_inst(arminsn->buf, size);
while (a_ptr->func) {
if ((inst & a_ptr->mask) == a_ptr->pattern) {
matched = 1;
break;
}
a_ptr++;
}
if (!matched)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "Unknown ARM Instruction: %08x", inst);
else a_ptr->func(arminsn, inst);
arminsn->str_hex = r_str_concatf(arminsn->str_hex, "%02x%02x%02x%02x",
*((ut8*)(&inst)), *((ut8*)(&inst)+1), *((ut8*)(&inst)+2), *((ut8*)(&inst)+3));
return size;
} else {
tinst = db_get_inst(arminsn->buf, THUMB_INSN_SIZE);
switch (tinst & 0xf800) {
case 0xe800:
case 0xf000:
case 0xf800:
size = THUMB2_INSN_SIZE;
inst = db_get_inst(arminsn->buf+1, THUMB_INSN_SIZE);
inst |= (tinst << 16);
while (t2_ptr->func) {
if ((inst & t2_ptr->mask) == t2_ptr->pattern) {
matched = 1;
break;
}
t2_ptr++;
}
if (!matched)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "Unknown Thumb2 Instruction: %08x", inst);
else t2_ptr->func(arminsn, inst);
arminsn->str_hex = r_str_concatf(arminsn->str_hex, "%02x%02x%02x%02x",
*((ut8*)(&inst)), *((ut8*)(&inst)+1), *((ut8*)(&inst)+2), *((ut8*)(&inst)+3));
return size;
default:
break;
}
size = THUMB_INSN_SIZE;
while (t_ptr->func) {
if ((tinst & t_ptr->mask) == t_ptr->pattern) {
matched = 1;
break;
}
t_ptr++;
}
if (!matched)
arminsn->str_asm = r_str_concatf(arminsn->str_asm, "Unknown Thumb Instruction: %04x", tinst);
else t_ptr->func(arminsn, tinst);
arminsn->str_hex = r_str_concatf(arminsn->str_hex, "%02x%02x", *((ut8*)(&tinst)), *((ut8*)(&tinst)+1));
return size;
}
return size;
}

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@ -0,0 +1,21 @@
#ifndef _INCLUDE_WINEDBG_BE_ARM_H_
#define _INCLUDE_WINEDBG_BE_ARM_H_
struct arm_insn {
ut64 pc;
const ut8 *buf;
int thumb;
char *str_asm;
char *str_hex;
};
int arm_disasm_one_insn(struct arm_insn *arminsn);
void arm_set_pc(struct arm_insn *arminsn, ut64 pc);
void arm_set_input_buffer(struct arm_insn *arminsn, const ut8 *buf);
void arm_set_thumb(struct arm_insn *arminsn, int thumb);
char* arm_insn_asm(struct arm_insn *arminsn);
char* arm_insn_hex(struct arm_insn *arminsn);
void* arm_free(struct arm_insn *arminsn);
struct arm_insn* arm_new();
#endif

View File

@ -12,7 +12,7 @@ ALL_TARGETS=
# TODO: rename to enabled plugins
ARCHS=mips.mk sparc.mk java.mk bf.mk arm.mk dalvik.mk x86_as.mk x86_nz.mk
ARCHS+=ppc.mk x86_olly.mk x86.mk csr.mk x86_nasm.mk psosvm.mk avr.mk
ARCHS+=msil.mk sh.mk
ARCHS+=msil.mk sh.mk arm_winedbg.mk
include $(ARCHS)
all: ${ALL_TARGETS}

10
libr/asm/p/arm_winedbg.mk Normal file
View File

@ -0,0 +1,10 @@
OBJ_ARM_WINEDBG=asm_arm_winedbg.o
OBJ_ARM_WINEDBG+=../arch/arm/winedbg/be_arm.o
STATIC_OBJ+=${OBJ_ARM_WINEDBG}
TARGET_ARM_WINEDBG=asm_arm_winedbg.${EXT_SO}
ALL_TARGETS+=${TARGET_ARM_WINEDBG}
${TARGET_ARM_WINEDBG}: ${OBJ_ARM_WINEDBG}
${CC} $(call libname,asm_arm_winedbg) ${LDFLAGS} ${CFLAGS} -o asm_arm_winedbg.${EXT_SO} ${OBJ_ARM_WINEDBG}

View File

@ -0,0 +1,40 @@
/* radare - LGPL - Copyright 2009-2011 nibble<.ds@gmail.com> */
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <r_types.h>
#include <r_util.h>
#include <r_lib.h>
#include <r_asm.h>
#include "../arch/arm/winedbg/be_arm.h"
static int disassemble(struct r_asm_t *a, struct r_asm_op_t *op, const ut8 *buf, ut64 len) {
struct arm_insn *arminsn = arm_new();
arm_set_pc(arminsn, a->pc);
arm_set_thumb(arminsn, R_FALSE);
arm_set_input_buffer(arminsn, buf);
op->inst_len = arm_disasm_one_insn(arminsn);
strncpy (op->buf_asm, arm_insn_asm(arminsn), R_ASM_BUFSIZE);
strncpy (op->buf_hex, arm_insn_hex(arminsn), R_ASM_BUFSIZE);
arm_free(arminsn);
return op->inst_len;
}
RAsmPlugin r_asm_plugin_arm_winedbg = {
.name = "arm_winedbg",
.arch = "arm",
.bits = (int[]){ 16, 32, 0 },
.desc = "ARM disassembly plugin (winedbg backend)",
.init = NULL,
.fini = NULL,
.disassemble = &disassemble,
.assemble = NULL
};
#ifndef CORELIB
struct r_lib_struct_t radare_plugin = {
.type = R_LIB_TYPE_ASM,
.data = &r_asm_plugin_arm_winedbg
};
#endif

View File

@ -149,6 +149,7 @@ extern RAsmPlugin r_asm_plugin_x86_olly;
extern RAsmPlugin r_asm_plugin_x86_nasm;
extern RAsmPlugin r_asm_plugin_arm;
extern RAsmPlugin r_asm_plugin_armthumb;
extern RAsmPlugin r_asm_plugin_arm_winedbg;
extern RAsmPlugin r_asm_plugin_csr;
extern RAsmPlugin r_asm_plugin_m68k;
extern RAsmPlugin r_asm_plugin_ppc;

View File

@ -9,6 +9,7 @@ STATIC="
asm.java
asm.bf
asm.arm
asm.arm_winedbg
asm.armthumb
asm.sh
asm.csr