mirror of
https://github.com/radareorg/radare2.git
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271 lines
7.9 KiB
C
271 lines
7.9 KiB
C
/* radare - LGPL - Copyright 2007-2014 - pancake */
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#include <r_types.h>
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#include <r_util.h>
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#include <r_list.h>
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#include <r_anal.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include "code.h"
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#include "class.h"
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#define V if (verbose)
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#define DO_THE_DBG 0
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#define IFDBG if(DO_THE_DBG)
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#ifndef R_API
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#define R_API
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#endif
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static void init_switch_op ();
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static int enter_switch_op (ut64 addr, const ut8 * bytes);
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static int update_switch_op (ut64 addr, const ut8 * bytes);
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static int update_bytes_consumed (int sz);
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static int handle_switch_op (ut64 addr, const ut8 * bytes, char *output, int outlen );
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static ut8 IN_SWITCH_OP = 0;
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typedef struct current_table_switch_t {
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ut64 addr;
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int def_jmp;
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int min_val;
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int max_val;
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int cur_val;
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} CurrentTableSwitch;
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static CurrentTableSwitch SWITCH_OP;
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static volatile ut64 BYTES_CONSUMED = 0;
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//static RBinJavaObj *BIN_OBJ = NULL;
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static void init_switch_op () {
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memset (&SWITCH_OP, 0, sizeof(SWITCH_OP));
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}
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static int enter_switch_op (ut64 addr, const ut8 * bytes ) {
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ut8 sz = (BYTES_CONSUMED+1) % 4 ? 1 + 4 - (BYTES_CONSUMED+1) % 4: 1; // + (BYTES_CONSUMED+1) % 4;
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ut8 sz2 = (4 - (addr+1) % 4) + (addr+1) % 4;
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IFDBG eprintf ("Addr approach: 0x%04x and BYTES_CONSUMED approach: 0x%04"PFMT64x", BYTES_CONSUMED%%4 = 0x%04x\n", sz2, BYTES_CONSUMED, sz);
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init_switch_op ();
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IN_SWITCH_OP = 1;
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SWITCH_OP.addr = addr;
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SWITCH_OP.def_jmp = (int)(UINT (bytes, sz));
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SWITCH_OP.min_val = (int)(UINT (bytes, sz + 4));
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SWITCH_OP.max_val = (int)(UINT (bytes, sz + 8));
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sz += 12;
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return sz;
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}
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static int update_bytes_consumed (int sz) {
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BYTES_CONSUMED += sz;
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return sz;
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}
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static int update_switch_op (ut64 addr, const ut8 * bytes) {
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int sz = 4;
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int ccase = SWITCH_OP.cur_val + SWITCH_OP.min_val;
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SWITCH_OP.cur_val++;
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if ( ccase+1 > SWITCH_OP.max_val) IN_SWITCH_OP = 0;
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IFDBG eprintf ("Addr approach: 0x%04"PFMT64x" and BYTES_CONSUMED approach: 0x%04"PFMT64x"\n", addr, BYTES_CONSUMED);
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return update_bytes_consumed(sz);
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}
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static int handle_switch_op (ut64 addr, const ut8 * bytes, char *output, int outlen ) {
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int sz = 4;
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ut32 jmp = (int)(UINT (bytes, 0)) + SWITCH_OP.addr;
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int ccase = SWITCH_OP.cur_val + SWITCH_OP.min_val;
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snprintf(output, outlen, "case %d: goto 0x%04x", ccase, jmp);
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update_switch_op (addr, bytes);
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return update_bytes_consumed(sz);
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}
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R_API int java_print_opcode(RBinJavaObj *obj, ut64 addr, int idx, const ut8 *bytes, char *output, int outlen) {
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char *arg = NULL; //(char *) malloc (1024);
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int sz = 0;
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ut32 val_one = 0,
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val_two = 0;
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ut8 op_byte = JAVA_OPS[idx].byte;
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if (IN_SWITCH_OP) {
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return handle_switch_op (addr, bytes, output, outlen );
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}
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IFDBG {
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eprintf ("Handling the following opcode %s expects: %d bytes, BYTES_CONSUMED: 0x%04"PFMT64x"\n",
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JAVA_OPS[idx].name, JAVA_OPS[idx].size, BYTES_CONSUMED);
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}
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switch (op_byte) {
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case 0x10: // "bipush"
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snprintf (output, outlen, "%s %d", JAVA_OPS[idx].name, (char) bytes[1]);
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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case 0x11:
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snprintf (output, outlen, "%s %d", JAVA_OPS[idx].name, (int)USHORT (bytes, 1));
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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case 0x15: // "iload"
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case 0x16: // "lload"
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case 0x17: // "fload"
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case 0x18: // "dload"
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case 0x19: // "aload"
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case 0x37: // "lstore"
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case 0x38: // "fstore"
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case 0x39: // "dstore"
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case 0x3a: // "astore"
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case 0xbc: // "newarray"
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case 0xa9: // ret <var-num>
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snprintf (output, outlen, "%s %d", JAVA_OPS[idx].name, bytes[1]);
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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case 0x12: // ldc
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arg = r_bin_java_resolve_without_space (obj, (ut16)bytes[1]);
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if (arg) {
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snprintf (output, outlen, "%s %s", JAVA_OPS[idx].name, arg);
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free (arg);
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}else {
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snprintf (output, outlen, "%s #%d", JAVA_OPS[idx].name, USHORT (bytes, 1));
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}
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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case 0x13:
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case 0x14:
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arg = r_bin_java_resolve_without_space (obj, (int)USHORT (bytes, 1));
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if (arg) {
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snprintf (output, outlen, "%s %s", JAVA_OPS[idx].name, arg);
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free (arg);
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}else {
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snprintf (output, outlen, "%s #%d", JAVA_OPS[idx].name, USHORT (bytes, 1));
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}
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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case 0x84: // iinc
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val_one = (ut32)bytes[1];
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val_two = (ut32) bytes[2];
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snprintf (output, outlen, "%s %d %d", JAVA_OPS[idx].name, val_one, val_two);
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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case 0x99: // ifeq
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case 0x9a: // ifne
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case 0x9b: // iflt
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case 0x9c: // ifge
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case 0x9d: // ifgt
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case 0x9e: // ifle
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case 0x9f: // if_icmpeq
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case 0xa0: // if_icmpne
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case 0xa1: // if_icmplt
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case 0xa2: // if_icmpge
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case 0xa3: // if_icmpgt
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case 0xa4: // if_icmple
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case 0xa5: // if_acmpne
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case 0xa6: // if_acmpne
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case 0xa7: // goto
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case 0xa8: // jsr
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snprintf (output, outlen, "%s 0x%04"PFMT64x, JAVA_OPS[idx].name,
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(addr+(short)USHORT (bytes, 1)));
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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// XXX - Figure out what constitutes the [<high>] value
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case 0xab: // tableswitch
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case 0xaa: // tableswitch
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sz = enter_switch_op (addr, bytes);
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snprintf (output, outlen, "%s default: 0x%04"PFMT64x, JAVA_OPS[idx].name,
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SWITCH_OP.def_jmp+SWITCH_OP.addr);
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return update_bytes_consumed (sz);
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case 0xb6: // invokevirtual
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case 0xb7: // invokespecial
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case 0xb8: // invokestatic
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case 0xb9: // invokeinterface
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case 0xba: // invokedynamic
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arg = r_bin_java_resolve_without_space (obj, (int)USHORT (bytes, 1));
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if (arg) {
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snprintf (output, outlen, "%s %s", JAVA_OPS[idx].name, arg);
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free (arg);
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}else {
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snprintf (output, outlen, "%s #%d", JAVA_OPS[idx].name, USHORT (bytes, 1) );
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}
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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case 0xb2: // getstatic
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case 0xb3: // putstatic
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case 0xb4: // getfield
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case 0xb5: // putfield
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case 0xbb: // new
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case 0xbd: // anewarray
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case 0xc0: // checkcast
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case 0xc1: // instance of
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arg = r_bin_java_resolve_with_space (obj, (int)USHORT (bytes, 1));
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if (arg) {
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snprintf (output, outlen, "%s %s", JAVA_OPS[idx].name, arg);
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free (arg);
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} else {
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snprintf (output, outlen, "%s #%d", JAVA_OPS[idx].name, USHORT (bytes, 1) );
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}
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output[outlen-1] = 0;
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return update_bytes_consumed (JAVA_OPS[idx].size);
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}
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/* process arguments */
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switch (JAVA_OPS[idx].size) {
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case 1: snprintf (output, outlen, "%s", JAVA_OPS[idx].name);
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break;
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case 2: snprintf (output, outlen, "%s %d", JAVA_OPS[idx].name, bytes[1]);
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break;
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case 3: snprintf (output, outlen, "%s 0x%04x 0x%04x", JAVA_OPS[idx].name, bytes[0], bytes[1]);
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break;
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case 5: snprintf (output, outlen, "%s %d", JAVA_OPS[idx].name, bytes[1]);
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break;
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}
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return update_bytes_consumed (JAVA_OPS[idx].size);
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}
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R_API void r_java_new_method () {
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IFDBG eprintf ("Reseting the bytes consumed, they were: 0x%04"PFMT64x".\n", BYTES_CONSUMED);
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IN_SWITCH_OP = 0;
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init_switch_op ();
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BYTES_CONSUMED = 0;
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}
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R_API void U(r_java_set_obj)(RBinJavaObj *obj) {
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// eprintf ("SET CP (%p) %d\n", cp, n);
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//BIN_OBJ = obj;
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}
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R_API int r_java_disasm(RBinJavaObj *obj, ut64 addr, const ut8 *bytes, char *output, int outlen) {
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//r_cons_printf ("r_java_disasm (allowed %d): 0x%02x, 0x%0x.\n", outlen, bytes[0], addr);
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return java_print_opcode (obj, addr, bytes[0], bytes, output, outlen);
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}
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R_API int r_java_assemble(ut8 *bytes, const char *string) {
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char name[128];
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int a,b,c,d;
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int i;
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sscanf (string, "%s %d %d %d %d", name, &a, &b, &c, &d);
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for (i = 0; JAVA_OPS[i].name != NULL; i++)
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if (!strcmp (name, JAVA_OPS[i].name)) {
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bytes[0] = JAVA_OPS[i].byte;
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switch (JAVA_OPS[i].size) {
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case 2: bytes[1] = a; break;
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case 3: bytes[1] = a; bytes[2] = b; break;
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case 5: bytes[1] = a;
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bytes[2] = b;
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bytes[3] = c;
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bytes[4] = d;
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break;
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}
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return JAVA_OPS[i].size;
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}
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return 0;
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}
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