mirror of
https://github.com/radareorg/radare2.git
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1076 lines
31 KiB
C
1076 lines
31 KiB
C
/*
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* Convert from ESIL to REIL (Reverse Engineering Intermediate Language)
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* Contributor: sushant94
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*/
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#include <r_anal.h>
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#define REIL_TEMP_PREFIX "V"
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#define REIL_REG_PREFIX "R_"
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#define REGBUFSZ 32
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void reil_flag_spew_inst(RAnalEsil *esil, const char *flag);
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static const char *ops[] = { FOREACHOP(REIL_OP_STRING) };
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// Get size of a register.
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static ut8 esil_internal_sizeof_reg(RAnalEsil *esil, const char *r) {
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RRegItem *i;
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if (!esil || !esil->anal || !esil->anal->reg || !r)
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return false;
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i = r_reg_get(esil->anal->reg, r, -1);
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if (!i)
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return false;
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return (ut8)i->size;
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}
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RAnalReilArgType reil_get_arg_type(RAnalEsil *esil, char *s) {
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if (!strncmp(s, REIL_TEMP_PREFIX, strlen(REIL_TEMP_PREFIX)))
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return ARG_TEMP;
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int type = r_anal_esil_get_parm_type(esil, s);
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switch (type) {
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case R_ANAL_ESIL_PARM_REG:
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return ARG_REG;
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case R_ANAL_ESIL_PARM_NUM:
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return ARG_CONST;
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case R_ANAL_ESIL_PARM_INTERNAL:
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return ARG_ESIL_INTERNAL;
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default:
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return ARG_NONE;
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}
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}
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// Marshall the struct into a string
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void reil_push_arg(RAnalEsil *esil, RAnalReilArg *op) {
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char tmp_buf[REGBUFSZ];
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snprintf(tmp_buf, REGBUFSZ, "%s:%d", op->name, op->size);
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r_anal_esil_push (esil, tmp_buf);
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}
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// Unmarshall the string in stack to the struct.
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RAnalReilArg *reil_pop_arg(RAnalEsil *esil) {
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RAnalReilArg *op;
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int i, j = 0, flag = 0, len;
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char tmp_buf[REGBUFSZ];
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char *buf = r_anal_esil_pop(esil);
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if (!buf) return NULL;
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len = strlen(buf);
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op = R_NEW0(RAnalReilArg);
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for (i = 0; i < len; i++) {
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if (buf[i] == ':') {
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tmp_buf[j] = '\0';
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strncpy(op->name, tmp_buf, sizeof(op->name) - 1);
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memset(tmp_buf, 0, sizeof(tmp_buf));
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j = 0;
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flag = 1;
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continue;
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}
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// Strip all spaces
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if (buf[i] == ' ') continue;
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tmp_buf[j] = buf[i];
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j++;
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}
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tmp_buf[j] = '\0';
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// If we have not encountered a ':' we don't know the size yet.
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if (!flag) {
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strncpy(op->name, tmp_buf, sizeof(op->name) - 1);
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op->type = reil_get_arg_type(esil, op->name);
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if (op->type == ARG_REG) {
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op->size = esil_internal_sizeof_reg(esil, op->name);
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} else if (op->type == ARG_CONST) {
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op->size = esil->anal->bits;
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}
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return op;
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}
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op->size = strtoll(tmp_buf, NULL, 10);
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op->type = reil_get_arg_type(esil, op->name);
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return op;
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}
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// Get the next available temp register.
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void get_next_temp_reg(RAnalEsil *esil, char *buf) {
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snprintf (buf, REGBUFSZ, REIL_TEMP_PREFIX"_%02"PFMT64u,
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esil->Reil->reilNextTemp);
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esil->Reil->reilNextTemp++;
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}
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void reil_make_arg(RAnalEsil *esil, RAnalReilArg *arg, char *name) {
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if (!arg) return;
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RAnalReilArgType type;
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type = reil_get_arg_type(esil, name);
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arg->size = 0;
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arg->type = type;
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memset(arg->name, 0, sizeof(arg->name));
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strncpy(arg->name, name, sizeof(arg->name) - 1);
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}
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// Free ins and all its arguments
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void reil_free_inst(RAnalReilInst *ins) {
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if (!ins) return;
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if (ins->arg[0]) R_FREE(ins->arg[0]);
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if (ins->arg[1]) R_FREE(ins->arg[1]);
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if (ins->arg[2]) R_FREE(ins->arg[2]);
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R_FREE(ins);
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}
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// Automatically increments the seq_num of the instruction.
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void reil_print_inst(RAnalEsil *esil, RAnalReilInst *ins) {
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char tmp_buf[REGBUFSZ];
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int i;
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if ((!ins) || (!esil)) return;
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esil->anal->cb_printf("%04"PFMT64x".%02"PFMT64x": %8s",
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esil->Reil->addr,
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esil->Reil->seq_num++,
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ops[ins->opcode]);
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for (i = 0; i < 3; i++) {
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if (i != 0)
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esil->anal->cb_printf (" ,");
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if (ins->arg[i]->type == ARG_NONE) {
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esil->anal->cb_printf ("%10s ", ins->arg[i]->name);
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continue;
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}
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if (ins->arg[i]->type == ARG_REG) {
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strncpy (tmp_buf, REIL_REG_PREFIX, sizeof(tmp_buf) - 1);
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strncat (tmp_buf, ins->arg[i]->name, sizeof(tmp_buf) - strlen(tmp_buf) - 1);
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esil->anal->cb_printf ("%10s:%02d", tmp_buf, ins->arg[i]->size);
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continue;
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}
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esil->anal->cb_printf ("%10s:%02d", ins->arg[i]->name, ins->arg[i]->size);
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}
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esil->anal->cb_printf("\n");
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}
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// Used to cast sizes during assignment. OR is used for casting.
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// Pushes the new *casted* src onto stack. Warning: Frees the original src!
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void reil_cast_size(RAnalEsil *esil, RAnalReilArg *src, RAnalReilArg *dst) {
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char tmp_buf[REGBUFSZ];
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RAnalReilInst *ins;
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// No need to case sizes if dst and src are of same size.
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if (src->size == dst->size) {
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reil_push_arg(esil, src);
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return;
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}
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snprintf (tmp_buf, REGBUFSZ-1, "0:%d", dst->size);
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r_anal_esil_push (esil, tmp_buf);
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ins = R_NEW0 (RAnalReilInst);
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ins->opcode = REIL_OR;
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ins->arg[0] = src;
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ins->arg[1] = reil_pop_arg (esil);
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ins->arg[2] = R_NEW0(RAnalReilArg);
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get_next_temp_reg (esil, tmp_buf);
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reil_make_arg (esil, ins->arg[2], tmp_buf);
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if (ins->arg[2])
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ins->arg[2]->size = dst->size;
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reil_print_inst (esil, ins);
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if (ins->arg[2])
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reil_push_arg (esil, ins->arg[2]);
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reil_free_inst (ins);
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}
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// Here start translation functions!
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static int reil_eq(RAnalEsil *esil) {
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RAnalReilInst *ins;
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char tmp_buf[REGBUFSZ];
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RAnalReilArgType src_type, dst_type;
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RAnalReilArg *dst, *src;
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dst = reil_pop_arg (esil);
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if (!dst) return false;
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src = reil_pop_arg (esil);
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if (!src) {
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R_FREE (dst);
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return false;
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}
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src_type = src->type;
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// Check if the src is an internal var. If it is, we need to resolve it.
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if (src_type == ARG_ESIL_INTERNAL) {
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reil_flag_spew_inst(esil, src->name + 1);
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R_FREE (src);
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src = reil_pop_arg(esil);
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} else if (src_type == ARG_REG) {
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// No direct register to register transfer.
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ins = R_NEW0 (RAnalReilInst);
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ins->opcode = REIL_STR;
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ins->arg[0] = src;
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ins->arg[1] = R_NEW0(RAnalReilArg);
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ins->arg[2] = R_NEW0(RAnalReilArg);
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reil_make_arg(esil, ins->arg[1], " ");
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get_next_temp_reg(esil, tmp_buf);
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reil_make_arg(esil, ins->arg[2], tmp_buf);
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ins->arg[2]->size = ins->arg[0]->size;
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reil_print_inst(esil, ins);
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reil_push_arg(esil, ins->arg[2]);
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reil_free_inst(ins);
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src = reil_pop_arg(esil);
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}
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// First, make a copy of the dst. We will need this to set the flags later on.
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ins = R_NEW0 (RAnalReilInst);
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dst_type = dst->type;
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if (src_type != ARG_ESIL_INTERNAL && dst_type == ARG_REG) {
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ins->opcode = REIL_STR;
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ins->arg[0] = dst;
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ins->arg[1] = R_NEW0(RAnalReilArg);
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ins->arg[2] = R_NEW0(RAnalReilArg);
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reil_make_arg(esil, ins->arg[1], " ");
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get_next_temp_reg(esil, tmp_buf);
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reil_make_arg(esil, ins->arg[2], tmp_buf);
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ins->arg[2]->size = ins->arg[0]->size;
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reil_print_inst(esil, ins);
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// Used for setting the flags
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snprintf (esil->Reil->old, sizeof (esil->Reil->old) - 1, "%s:%d",
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ins->arg[2]->name, ins->arg[2]->size);
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snprintf (esil->Reil->cur, sizeof (esil->Reil->cur) - 1, "%s:%d", dst->name,
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dst->size);
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esil->Reil->lastsz = dst->size;
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R_FREE(ins->arg[1]);
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R_FREE(ins->arg[2]);
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}
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// If we are modifying the Instruction Pointer, then we need to emit JCC instead.
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if (!strcmp(esil->Reil->pc, dst->name)) {
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ins->opcode = REIL_JCC;
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r_anal_esil_push (esil, "1:1");
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ins->arg[0] = reil_pop_arg (esil);
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ins->arg[1] = R_NEW0 (RAnalReilArg);
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reil_make_arg (esil, ins->arg[1], " ");
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ins->arg[2] = src;
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reil_print_inst (esil, ins);
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reil_free_inst(ins);
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R_FREE (dst);
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return true;
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}
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reil_cast_size(esil, src, dst);
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ins->opcode = REIL_STR;
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ins->arg[0] = reil_pop_arg(esil);
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if (!ins->arg[0]) {
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R_FREE (dst);
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R_FREE (ins);
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return false;
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}
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ins->arg[2] = dst;
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ins->arg[1] = R_NEW0(RAnalReilArg);
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reil_make_arg(esil, ins->arg[1], " ");
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reil_print_inst(esil, ins);
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reil_free_inst(ins);
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return true;
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}
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// General function for operations that take 2 operands
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static int reil_binop(RAnalEsil *esil, RAnalReilOpcode opcode) {
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RAnalReilInst *ins;
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char tmp_buf[REGBUFSZ];
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ut8 dst_size;
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RAnalReilArg *op2, *op1;
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op2 = reil_pop_arg(esil);
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if (!op2) return false;
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op1 = reil_pop_arg(esil);
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if (!op1) {
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R_FREE (op2);
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return false;
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}
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ins = R_NEW0 (RAnalReilInst);
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ins->opcode = opcode;
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ins->arg[0] = op2;
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ins->arg[1] = op1;
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ins->arg[2] = R_NEW0(RAnalReilArg);
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get_next_temp_reg(esil, tmp_buf);
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reil_make_arg(esil, ins->arg[2], tmp_buf);
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// Choose the larger of the two sizes as the size of dst
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dst_size = ins->arg[0]->size;
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if (dst_size < ins->arg[1]->size)
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dst_size = ins->arg[1]->size;
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// REIL_LT has a dst_size of 1.
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if (opcode == REIL_LT)
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dst_size = 1;
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ins->arg[2]->size = dst_size;
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reil_print_inst(esil, ins);
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reil_push_arg(esil, ins->arg[2]);
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reil_free_inst(ins);
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return true;
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}
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// General function for operations which re-assign to dst. Example, addeq.
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static int reil_bineqop(RAnalEsil *esil, RAnalReilOpcode opcode) {
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int ret = 1;
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RAnalReilArg *op = reil_pop_arg(esil);
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if (!op) return false;
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reil_push_arg(esil, op);
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ret &= reil_binop(esil, opcode);
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reil_push_arg(esil, op);
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ret &= reil_eq(esil);
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R_FREE(op);
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return ret;
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}
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static int reil_add(RAnalEsil *esil) { return reil_binop (esil, REIL_ADD); }
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static int reil_addeq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_ADD); }
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static int reil_mul(RAnalEsil *esil) { return reil_binop (esil, REIL_MUL); }
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static int reil_muleq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_MUL); }
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static int reil_sub(RAnalEsil *esil) { return reil_binop (esil, REIL_SUB); }
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static int reil_subeq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_SUB); }
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static int reil_div(RAnalEsil *esil) { return reil_binop (esil, REIL_DIV); }
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static int reil_diveq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_DIV); }
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static int reil_xor(RAnalEsil *esil) { return reil_binop (esil, REIL_XOR); }
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static int reil_xoreq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_XOR); }
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static int reil_and(RAnalEsil *esil) { return reil_binop (esil, REIL_AND); }
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static int reil_andeq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_AND); }
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static int reil_or(RAnalEsil *esil) { return reil_binop (esil, REIL_OR); }
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static int reil_oreq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_OR); }
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static int reil_lsl(RAnalEsil *esil) { return reil_binop (esil, REIL_SHL); }
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static int reil_lsleq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_SHL); }
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static int reil_lsr(RAnalEsil *esil) { return reil_binop (esil, REIL_SHR); }
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static int reil_lsreq(RAnalEsil *esil) { return reil_bineqop (esil, REIL_SHR); }
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static int reil_smaller(RAnalEsil *esil) { return reil_binop (esil, REIL_LT); }
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static int reil_cmp(RAnalEsil *esil) {
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RAnalReilInst *ins;
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char tmp_buf[REGBUFSZ];
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RAnalReilArg *op2, *op1;
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op2 = reil_pop_arg(esil);
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if (!op2) return false;
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op1 = reil_pop_arg(esil);
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if (!op1) {
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R_FREE (op2);
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return false;
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}
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ins = R_NEW0 (RAnalReilInst);
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ins->opcode = REIL_EQ;
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ins->arg[0] = op2;
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ins->arg[1] = op1;
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ins->arg[2] = R_NEW0(RAnalReilArg);
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get_next_temp_reg(esil, tmp_buf);
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reil_make_arg(esil, ins->arg[2], tmp_buf);
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ins->arg[2]->size = 1;
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reil_print_inst(esil, ins);
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// Set vars needed to determine flags.
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snprintf(esil->Reil->cur, sizeof(esil->Reil->old) - 1, "%s:%d",
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ins->arg[2]->name, ins->arg[2]->size);
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snprintf(esil->Reil->old, sizeof(esil->Reil->cur) - 1, "%s:%d", op2->name,
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op2->size);
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if (r_reg_get(esil->anal->reg, op2->name, -1)) {
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esil->Reil->lastsz = op2->size;
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} else if (r_reg_get(esil->anal->reg, op1->name, -1)) {
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esil->Reil->lastsz = op1->size;
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}
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reil_push_arg(esil, ins->arg[2]);
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reil_free_inst(ins);
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return true;
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}
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static int reil_smaller_equal(RAnalEsil *esil) {
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RAnalReilArg *op2, *op1;
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op2 = reil_pop_arg(esil);
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if (!op2) return false;
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op1 = reil_pop_arg(esil);
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if (!op1) {
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R_FREE (op2);
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return false;
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}
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reil_push_arg(esil, op1);
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reil_push_arg(esil, op2);
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reil_smaller(esil);
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reil_push_arg(esil, op1);
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reil_push_arg(esil, op2);
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reil_cmp(esil);
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reil_or(esil);
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R_FREE(op1);
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R_FREE(op2);
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return true;
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}
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static int reil_larger(RAnalEsil *esil) {
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RAnalReilArg *op2, *op1;
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op2 = reil_pop_arg(esil);
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if (!op2) return false;
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op1 = reil_pop_arg(esil);
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if (!op1) {
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R_FREE (op2);
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return false;
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}
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reil_push_arg(esil, op2);
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reil_push_arg(esil, op1);
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reil_smaller(esil);
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R_FREE(op1);
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R_FREE(op2);
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return true;
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}
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static int reil_larger_equal(RAnalEsil *esil) {
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RAnalReilArg *op2, *op1;
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op2 = reil_pop_arg(esil);
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if (!op2) return false;
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op1 = reil_pop_arg(esil);
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if (!op1) {
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R_FREE (op2);
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return false;
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}
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|
|
reil_push_arg(esil, op2);
|
|
reil_push_arg(esil, op1);
|
|
reil_smaller_equal(esil);
|
|
R_FREE(op1);
|
|
R_FREE(op2);
|
|
return true;
|
|
}
|
|
|
|
static int reil_dec(RAnalEsil *esil) {
|
|
RAnalReilArg *op = reil_pop_arg(esil);
|
|
if (!op) return false;
|
|
|
|
r_anal_esil_pushnum(esil, 1);
|
|
reil_push_arg(esil, op);
|
|
reil_sub(esil);
|
|
R_FREE(op);
|
|
return true;
|
|
}
|
|
|
|
static int reil_deceq(RAnalEsil *esil) {
|
|
RAnalReilArg *op1 = reil_pop_arg(esil);
|
|
if (!op1) return false;
|
|
|
|
reil_push_arg(esil, op1);
|
|
reil_dec(esil);
|
|
reil_push_arg(esil, op1);
|
|
reil_eq(esil);
|
|
R_FREE(op1);
|
|
return true;
|
|
}
|
|
|
|
static int reil_inc(RAnalEsil *esil) {
|
|
RAnalReilArg *op = reil_pop_arg(esil);
|
|
if (!op) return false;
|
|
|
|
r_anal_esil_pushnum(esil, 1);
|
|
reil_push_arg(esil, op);
|
|
reil_add(esil);
|
|
R_FREE(op);
|
|
return true;
|
|
}
|
|
|
|
static int reil_inceq(RAnalEsil *esil) {
|
|
RAnalReilArg *op = reil_pop_arg(esil);
|
|
if (!op) return false;
|
|
|
|
reil_push_arg(esil, op);
|
|
reil_inc(esil);
|
|
reil_push_arg(esil, op);
|
|
reil_eq(esil);
|
|
R_FREE(op);
|
|
return true;
|
|
}
|
|
|
|
static int reil_neg(RAnalEsil *esil) {
|
|
char tmp_buf[REGBUFSZ];
|
|
RAnalReilInst *ins;
|
|
RAnalReilArg *op = reil_pop_arg(esil);
|
|
if (!op) return false;
|
|
|
|
ins = R_NEW0 (RAnalReilInst);
|
|
ins->opcode = REIL_EQ;
|
|
ins->arg[0] = op;
|
|
r_anal_esil_pushnum (esil, 0);
|
|
ins->arg[1] = reil_pop_arg(esil);
|
|
ins->arg[2] = R_NEW0 (RAnalReilArg);
|
|
get_next_temp_reg(esil, tmp_buf);
|
|
reil_make_arg(esil, ins->arg[2], tmp_buf);
|
|
if (ins->arg[0]->size < ins->arg[1]->size)
|
|
ins->arg[1]->size = ins->arg[0]->size;
|
|
|
|
ins->arg[2]->size = 1;
|
|
reil_print_inst (esil, ins);
|
|
reil_push_arg (esil, ins->arg[2]);
|
|
reil_free_inst(ins);
|
|
return true;
|
|
}
|
|
|
|
static int reil_negeq(RAnalEsil *esil) {
|
|
RAnalReilArg *op = reil_pop_arg(esil);
|
|
if (!op) return false;
|
|
reil_push_arg (esil, op);
|
|
reil_neg (esil);
|
|
reil_push_arg (esil, op);
|
|
reil_eq (esil);
|
|
free (op);
|
|
return true;
|
|
}
|
|
|
|
static int reil_not(RAnalEsil *esil) {
|
|
char tmp_buf[REGBUFSZ];
|
|
RAnalReilInst *ins;
|
|
RAnalReilArg *op = reil_pop_arg(esil);
|
|
if (!op) return false;
|
|
|
|
ins = R_NEW0 (RAnalReilInst);
|
|
ins->opcode = REIL_NOT;
|
|
ins->arg[0] = op;
|
|
ins->arg[1] = R_NEW0(RAnalReilArg);
|
|
ins->arg[2] = R_NEW0(RAnalReilArg);
|
|
reil_make_arg(esil, ins->arg[1], " ");
|
|
get_next_temp_reg(esil, tmp_buf);
|
|
reil_make_arg(esil, ins->arg[2], tmp_buf);
|
|
ins->arg[2]->size = ins->arg[0]->size;
|
|
reil_print_inst(esil, ins);
|
|
reil_push_arg(esil, ins->arg[2]);
|
|
reil_free_inst(ins);
|
|
return true;
|
|
}
|
|
|
|
static int reil_if(RAnalEsil *esil) {
|
|
RAnalReilInst *ins;
|
|
RAnalReilArg *op2, *op1;
|
|
|
|
op2 = reil_pop_arg(esil);
|
|
if (!op2) return false;
|
|
op1 = reil_pop_arg(esil);
|
|
if (!op1) {
|
|
R_FREE (op2);
|
|
return false;
|
|
}
|
|
|
|
ins = R_NEW0 (RAnalReilInst);
|
|
ins->opcode = REIL_JCC;
|
|
ins->arg[0] = op1;
|
|
ins->arg[2] = op2;
|
|
ins->arg[1] = R_NEW0(RAnalReilArg);
|
|
reil_make_arg(esil, ins->arg[1], " ");
|
|
reil_print_inst(esil, ins);
|
|
reil_free_inst(ins);
|
|
return true;
|
|
}
|
|
|
|
static int reil_if_end(RAnalEsil *esil) { return true; }
|
|
|
|
static int reil_peek(RAnalEsil *esil) {
|
|
RAnalReilInst *ins;
|
|
char tmp_buf[REGBUFSZ];
|
|
RAnalReilArg *op1 = reil_pop_arg(esil);
|
|
if (!op1) return false;
|
|
|
|
ins = R_NEW0 (RAnalReilInst);
|
|
ins->opcode = REIL_LDM;
|
|
ins->arg[0] = op1;
|
|
ins->arg[1] = R_NEW0(RAnalReilArg);
|
|
ins->arg[2] = R_NEW0(RAnalReilArg);
|
|
reil_make_arg(esil, ins->arg[1], " ");
|
|
get_next_temp_reg(esil, tmp_buf);
|
|
reil_make_arg(esil, ins->arg[2], tmp_buf);
|
|
ins->arg[2]->size = ins->arg[0]->size;
|
|
reil_print_inst(esil, ins);
|
|
reil_push_arg(esil, ins->arg[2]);
|
|
reil_free_inst(ins);
|
|
return true;
|
|
}
|
|
|
|
// n = 8, 4, 2, 1
|
|
static int reil_peekn(RAnalEsil *esil, ut8 n) {
|
|
RAnalReilArg *op2;
|
|
RAnalReilArg *op1 = reil_pop_arg(esil);
|
|
if (!op1) return false;
|
|
|
|
reil_push_arg(esil, op1);
|
|
reil_peek(esil);
|
|
// No need to cast if n = 0
|
|
if (n == 0) {
|
|
R_FREE(op1);
|
|
return true;
|
|
}
|
|
|
|
R_FREE(op1);
|
|
op1 = reil_pop_arg(esil);
|
|
if (!op1) return false;
|
|
|
|
op2 = R_NEW0(RAnalReilArg);
|
|
op2->size = n * 8;
|
|
op2->type = ARG_TEMP;
|
|
get_next_temp_reg(esil, op2->name);
|
|
reil_cast_size(esil, op1, op2);
|
|
esil->Reil->lastsz = 8 * n;
|
|
|
|
R_FREE (op2);
|
|
return true;
|
|
}
|
|
|
|
static int reil_peek1(RAnalEsil *esil) { return reil_peekn(esil, 1); }
|
|
static int reil_peek2(RAnalEsil *esil) { return reil_peekn(esil, 2); }
|
|
static int reil_peek4(RAnalEsil *esil) { return reil_peekn(esil, 4); }
|
|
static int reil_peek8(RAnalEsil *esil) { return reil_peekn(esil, 8); }
|
|
|
|
// n = 8, 4, 2, 1
|
|
static int reil_poken(RAnalEsil *esil, ut8 n) {
|
|
char tmp_buf[REGBUFSZ];
|
|
RAnalReilInst *ins;
|
|
RAnalReilArg *op2, *op1;
|
|
|
|
op2 = reil_pop_arg(esil);
|
|
if (!op2) return false;
|
|
op1 = reil_pop_arg(esil);
|
|
if (!op1) {
|
|
R_FREE (op2);
|
|
return false;
|
|
}
|
|
|
|
if (op1->type != ARG_ESIL_INTERNAL) {
|
|
ins = R_NEW0 (RAnalReilInst);
|
|
ins->opcode = REIL_LDM;
|
|
ins->arg[0] = op2;
|
|
ins->arg[1] = R_NEW0(RAnalReilArg);
|
|
ins->arg[2] = R_NEW0(RAnalReilArg);
|
|
reil_make_arg(esil, ins->arg[1], " ");
|
|
get_next_temp_reg(esil, tmp_buf);
|
|
reil_make_arg(esil, ins->arg[2], tmp_buf);
|
|
ins->arg[2]->size = ins->arg[0]->size;
|
|
reil_print_inst(esil, ins);
|
|
snprintf(esil->Reil->old, sizeof (esil->Reil->old) - 1, "%s:%d",
|
|
ins->arg[2]->name, ins->arg[2]->size);
|
|
snprintf(esil->Reil->cur, sizeof (esil->Reil->cur) - 1, "%s:%d", op2->name,
|
|
op2->size);
|
|
esil->lastsz = n * 8;
|
|
reil_push_arg(esil, op1);
|
|
reil_push_arg(esil, op2);
|
|
R_FREE(op1);
|
|
reil_free_inst(ins);
|
|
} else {
|
|
reil_flag_spew_inst(esil, op1->name + 1);
|
|
R_FREE(op1);
|
|
op1 = reil_pop_arg(esil);
|
|
reil_push_arg(esil, op2);
|
|
reil_push_arg(esil, op1);
|
|
R_FREE(op2);
|
|
R_FREE(op1);
|
|
}
|
|
|
|
ins = R_NEW0 (RAnalReilInst);
|
|
ins->opcode = REIL_STM;
|
|
ins->arg[2] = reil_pop_arg(esil);
|
|
ins->arg[0] = reil_pop_arg(esil);
|
|
ins->arg[1] = R_NEW0(RAnalReilArg);
|
|
reil_make_arg(esil, ins->arg[1], " ");
|
|
reil_print_inst(esil, ins);
|
|
reil_free_inst(ins);
|
|
return true;
|
|
}
|
|
|
|
static int reil_poke(RAnalEsil *esil) {
|
|
return reil_poken(esil, esil->anal->bits / 8);
|
|
}
|
|
|
|
static int reil_poke1(RAnalEsil *esil) { return reil_poken(esil, 1); }
|
|
static int reil_poke2(RAnalEsil *esil) { return reil_poken(esil, 2); }
|
|
static int reil_poke4(RAnalEsil *esil) { return reil_poken(esil, 4); }
|
|
static int reil_poke8(RAnalEsil *esil) { return reil_poken(esil, 8); }
|
|
|
|
// Generic function to handle all mem_*eq_n functions. Example, mem_oreq_n
|
|
static int reil_mem_bineq_n(RAnalEsil *esil, RAnalReilOpcode opcode, ut8 size) {
|
|
int ret = 1;
|
|
RAnalReilArg *op2, *op1;
|
|
|
|
op2 = reil_pop_arg(esil);
|
|
if (!op2) return false;
|
|
op1 = reil_pop_arg(esil);
|
|
if (!op1) {
|
|
R_FREE (op2);
|
|
return false;
|
|
}
|
|
|
|
reil_push_arg(esil, op2);
|
|
ret &= reil_peekn(esil, size);
|
|
reil_push_arg(esil, op1);
|
|
ret &= reil_binop(esil, opcode);
|
|
reil_push_arg(esil, op2);
|
|
ret &= reil_poken(esil, size);
|
|
|
|
free (op2);
|
|
free (op1);
|
|
return ret;
|
|
}
|
|
|
|
static int reil_mem_oreq(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_OR, esil->anal->bits / 8); }
|
|
static int reil_mem_oreq1(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_OR, 1); }
|
|
static int reil_mem_oreq2(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_OR, 2); }
|
|
static int reil_mem_oreq4(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_OR, 4); }
|
|
static int reil_mem_oreq8(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_OR, 8); }
|
|
|
|
static int reil_mem_andeq(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_AND, esil->anal->bits / 8); }
|
|
static int reil_mem_andeq1(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_AND, 1); }
|
|
static int reil_mem_andeq2(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_AND, 2); }
|
|
static int reil_mem_andeq4(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_AND, 4); }
|
|
static int reil_mem_andeq8(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_AND, 8); }
|
|
|
|
static int reil_mem_xoreq(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_XOR, esil->anal->bits / 8); }
|
|
static int reil_mem_xoreq1(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_XOR, 1); }
|
|
static int reil_mem_xoreq2(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_XOR, 2); }
|
|
static int reil_mem_xoreq4(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_XOR, 4); }
|
|
static int reil_mem_xoreq8(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_XOR, 8); }
|
|
|
|
static int reil_mem_addeq(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_ADD, esil->anal->bits / 8); }
|
|
static int reil_mem_addeq1(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_ADD, 1); }
|
|
static int reil_mem_addeq2(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_ADD, 2); }
|
|
static int reil_mem_addeq4(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_ADD, 4); }
|
|
static int reil_mem_addeq8(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_ADD, 8); }
|
|
|
|
static int reil_mem_subeq(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_SUB, esil->anal->bits / 8); }
|
|
static int reil_mem_subeq1(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_SUB, 1); }
|
|
static int reil_mem_subeq2(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_SUB, 2); }
|
|
static int reil_mem_subeq4(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_SUB, 4); }
|
|
static int reil_mem_subeq8(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_SUB, 8); }
|
|
|
|
static int reil_mem_muleq(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_MUL, esil->anal->bits / 8); }
|
|
static int reil_mem_muleq1(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_MUL, 1); }
|
|
static int reil_mem_muleq2(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_MUL, 2); }
|
|
static int reil_mem_muleq4(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_MUL, 4); }
|
|
static int reil_mem_muleq8(RAnalEsil *esil) { return reil_mem_bineq_n(esil, REIL_MUL, 8); }
|
|
|
|
static int reil_mem_inceq_n(RAnalEsil *esil, ut8 size) {
|
|
int ret = 1;
|
|
RAnalReilArg *op1 = reil_pop_arg(esil);
|
|
if (!op1) return false;
|
|
|
|
r_anal_esil_pushnum(esil, 1);
|
|
reil_push_arg(esil, op1);
|
|
ret &= reil_mem_bineq_n(esil, REIL_ADD, size);
|
|
|
|
free (op1);
|
|
return ret;
|
|
}
|
|
|
|
static int reil_mem_inceq(RAnalEsil *esil) {
|
|
return reil_mem_inceq_n(esil, esil->anal->bits / 8);
|
|
}
|
|
static int reil_mem_inceq1(RAnalEsil *esil) { return reil_mem_inceq_n(esil, 1); }
|
|
static int reil_mem_inceq2(RAnalEsil *esil) { return reil_mem_inceq_n(esil, 2); }
|
|
static int reil_mem_inceq4(RAnalEsil *esil) { return reil_mem_inceq_n(esil, 4); }
|
|
static int reil_mem_inceq8(RAnalEsil *esil) { return reil_mem_inceq_n(esil, 8); }
|
|
|
|
static int reil_mem_deceq_n(RAnalEsil *esil, ut8 size) {
|
|
int ret = 1;
|
|
RAnalReilArg *op1 = reil_pop_arg(esil);
|
|
if (!op1) return false;
|
|
|
|
r_anal_esil_pushnum(esil, 1);
|
|
reil_push_arg(esil, op1);
|
|
ret &= reil_mem_bineq_n(esil, REIL_SUB, size);
|
|
|
|
free (op1);
|
|
return ret;
|
|
}
|
|
|
|
static int reil_mem_deceq(RAnalEsil *esil) {
|
|
return reil_mem_deceq_n(esil, esil->anal->bits / 8);
|
|
}
|
|
static int reil_mem_deceq1(RAnalEsil *esil) { return reil_mem_deceq_n(esil, 1); }
|
|
static int reil_mem_deceq2(RAnalEsil *esil) { return reil_mem_deceq_n(esil, 2); }
|
|
static int reil_mem_deceq4(RAnalEsil *esil) { return reil_mem_deceq_n(esil, 4); }
|
|
static int reil_mem_deceq8(RAnalEsil *esil) { return reil_mem_deceq_n(esil, 8); }
|
|
|
|
// Functions to resolve internal vars.
|
|
// performs (2 << op) - 1
|
|
void reil_generate_mask(RAnalEsil *esil) {
|
|
r_anal_esil_pushnum(esil, 2);
|
|
reil_lsl(esil);
|
|
reil_dec(esil);
|
|
}
|
|
|
|
void reil_generate_borrow_flag(RAnalEsil *esil, ut8 bit) {
|
|
RAnalReilArg *op1;
|
|
|
|
r_anal_esil_pushnum(esil, bit);
|
|
r_anal_esil_pushnum(esil, 0x3f);
|
|
reil_and(esil);
|
|
r_anal_esil_pushnum(esil, 0x3f);
|
|
reil_add(esil);
|
|
r_anal_esil_pushnum(esil, 0x3f);
|
|
reil_and(esil);
|
|
// Generate the mask. 2 << bits - 1
|
|
reil_generate_mask(esil);
|
|
op1 = reil_pop_arg(esil);
|
|
// old & mask
|
|
r_anal_esil_push(esil, esil->Reil->old);
|
|
reil_push_arg(esil, op1);
|
|
reil_and(esil);
|
|
// cur & mask
|
|
r_anal_esil_push(esil, esil->Reil->cur);
|
|
reil_push_arg(esil, op1);
|
|
reil_and(esil);
|
|
// Check
|
|
reil_larger(esil);
|
|
|
|
free (op1);
|
|
}
|
|
|
|
void reil_generate_carry_flag(RAnalEsil *esil, ut8 bit) {
|
|
RAnalReilArg *op1;
|
|
|
|
r_anal_esil_pushnum(esil, bit);
|
|
r_anal_esil_pushnum(esil, 0x3f);
|
|
reil_and(esil);
|
|
// Generate the mask. 2 << bits - 1
|
|
reil_generate_mask(esil);
|
|
op1 = reil_pop_arg(esil);
|
|
// old & mask
|
|
r_anal_esil_push(esil, esil->Reil->old);
|
|
reil_push_arg(esil, op1);
|
|
reil_and(esil);
|
|
// cur & mask
|
|
r_anal_esil_push(esil, esil->Reil->cur);
|
|
reil_push_arg(esil, op1);
|
|
reil_and(esil);
|
|
// Check
|
|
reil_smaller(esil);
|
|
|
|
free (op1);
|
|
}
|
|
|
|
void reil_generate_partity_flag(RAnalEsil *esil) {
|
|
// Generation of parity flag taken from openreil README example.
|
|
RAnalReilArg *op;
|
|
r_anal_esil_push(esil, esil->Reil->cur);
|
|
r_anal_esil_pushnum(esil, 0xff);
|
|
reil_and(esil);
|
|
op = reil_pop_arg(esil);
|
|
if (!op) return;
|
|
|
|
r_anal_esil_pushnum(esil, 7);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
r_anal_esil_pushnum(esil, 6);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
reil_xor(esil);
|
|
r_anal_esil_pushnum(esil, 5);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
r_anal_esil_pushnum(esil, 4);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
reil_xor(esil);
|
|
reil_xor(esil);
|
|
r_anal_esil_pushnum(esil, 3);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
r_anal_esil_pushnum(esil, 2);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
reil_xor(esil);
|
|
r_anal_esil_pushnum(esil, 1);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
reil_push_arg(esil, op);
|
|
reil_xor(esil);
|
|
reil_xor(esil);
|
|
reil_xor(esil);
|
|
r_anal_esil_pushnum(esil, 1);
|
|
reil_and(esil);
|
|
reil_not(esil);
|
|
|
|
free (op);
|
|
}
|
|
|
|
void reil_generate_signature(RAnalEsil *esil) {
|
|
if (!esil->Reil->lastsz || esil->Reil->lastsz == 0) {
|
|
r_anal_esil_pushnum(esil, 0);
|
|
return;
|
|
}
|
|
|
|
RAnalReilArg *op;
|
|
|
|
r_anal_esil_pushnum(esil, esil->Reil->lastsz - 1);
|
|
r_anal_esil_pushnum(esil, 1);
|
|
reil_lsl(esil);
|
|
r_anal_esil_push(esil, esil->Reil->cur);
|
|
reil_and(esil);
|
|
|
|
op = reil_pop_arg(esil);
|
|
if (!op) return;
|
|
|
|
r_anal_esil_pushnum(esil, esil->Reil->lastsz - 1);
|
|
reil_push_arg(esil, op);
|
|
reil_lsr(esil);
|
|
|
|
free (op);
|
|
}
|
|
|
|
void reil_generate_overflow_flag(RAnalEsil *esil) {
|
|
if (esil->Reil->lastsz < 2)
|
|
r_anal_esil_pushnum(esil, 0);
|
|
|
|
reil_generate_borrow_flag(esil, esil->Reil->lastsz);
|
|
reil_generate_carry_flag(esil, esil->Reil->lastsz - 2);
|
|
reil_xor(esil);
|
|
}
|
|
|
|
void reil_flag_spew_inst(RAnalEsil *esil, const char *flag) {
|
|
ut8 bit;
|
|
switch (flag[0]) {
|
|
case 'z': // zero-flag
|
|
r_anal_esil_push(esil, esil->Reil->cur);
|
|
break;
|
|
case 'b':
|
|
bit = (ut8)r_num_get(NULL, &flag[1]);
|
|
reil_generate_borrow_flag(esil, bit);
|
|
break;
|
|
case 'c':
|
|
bit = (ut8)r_num_get(NULL, &flag[1]);
|
|
reil_generate_carry_flag(esil, bit);
|
|
break;
|
|
case 'o':
|
|
reil_generate_overflow_flag(esil);
|
|
break;
|
|
case 'p':
|
|
reil_generate_partity_flag(esil);
|
|
break;
|
|
case 'r':
|
|
r_anal_esil_pushnum(esil, esil->anal->bits / 8);
|
|
break;
|
|
case 's':
|
|
reil_generate_signature(esil);
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* Callback hook for command_hook */
|
|
static int setup_reil_ins(RAnalEsil *esil, const char *op) {
|
|
esil->Reil->addr++; // Increment the address location.
|
|
esil->Reil->seq_num = 0; // Reset the sequencing.
|
|
return 0;
|
|
}
|
|
|
|
R_API int r_anal_esil_to_reil_setup(RAnalEsil *esil, RAnal *anal, int romem,
|
|
int stats) {
|
|
if (!esil) return false;
|
|
|
|
esil->debug = 1;
|
|
esil->anal = anal;
|
|
esil->trap = 0;
|
|
esil->trap_code = 0;
|
|
|
|
/* Set up a callback for hook_command */
|
|
esil->cb.hook_command = setup_reil_ins;
|
|
|
|
esil->Reil = R_NEW0(RAnalReil);
|
|
if (!esil->Reil) {
|
|
return false;
|
|
}
|
|
esil->Reil->reilNextTemp = 0;
|
|
esil->Reil->addr = -1;
|
|
esil->Reil->seq_num = 0;
|
|
esil->Reil->skip = 0;
|
|
|
|
// Store the pc
|
|
const char *name = r_reg_get_name (esil->anal->reg, r_reg_get_name_idx ("PC"));
|
|
strncpy (esil->Reil->pc, name, sizeof(esil->Reil->pc) - 1);
|
|
|
|
r_anal_esil_mem_ro(esil, romem);
|
|
|
|
r_anal_esil_set_op(esil, "=", reil_eq);
|
|
r_anal_esil_set_op(esil, "+", reil_add);
|
|
r_anal_esil_set_op(esil, "+=", reil_addeq);
|
|
r_anal_esil_set_op(esil, "-", reil_sub);
|
|
r_anal_esil_set_op(esil, "-=", reil_subeq);
|
|
r_anal_esil_set_op(esil, "*", reil_mul);
|
|
r_anal_esil_set_op(esil, "*=", reil_muleq);
|
|
r_anal_esil_set_op(esil, "/", reil_div);
|
|
r_anal_esil_set_op(esil, "/=", reil_diveq);
|
|
r_anal_esil_set_op(esil, "^", reil_xor);
|
|
r_anal_esil_set_op(esil, "^=", reil_xoreq);
|
|
r_anal_esil_set_op(esil, "|", reil_or);
|
|
r_anal_esil_set_op(esil, "|=", reil_oreq);
|
|
r_anal_esil_set_op(esil, "&", reil_and);
|
|
r_anal_esil_set_op(esil, "&=", reil_andeq);
|
|
r_anal_esil_set_op(esil, "<<", reil_lsl);
|
|
r_anal_esil_set_op(esil, "<<=", reil_lsleq);
|
|
r_anal_esil_set_op(esil, ">>", reil_lsr);
|
|
r_anal_esil_set_op(esil, ">>=", reil_lsreq);
|
|
r_anal_esil_set_op(esil, "++=", reil_inceq);
|
|
r_anal_esil_set_op(esil, "++", reil_inc);
|
|
r_anal_esil_set_op(esil, "--=", reil_deceq);
|
|
r_anal_esil_set_op(esil, "--", reil_dec);
|
|
r_anal_esil_set_op(esil, "!", reil_neg);
|
|
r_anal_esil_set_op(esil, "!=", reil_negeq);
|
|
r_anal_esil_set_op(esil, "==", reil_cmp);
|
|
r_anal_esil_set_op(esil, "<", reil_smaller);
|
|
r_anal_esil_set_op(esil, ">", reil_larger);
|
|
r_anal_esil_set_op(esil, "<=", reil_smaller_equal);
|
|
r_anal_esil_set_op(esil, ">=", reil_larger_equal);
|
|
r_anal_esil_set_op(esil, "[]", reil_peek);
|
|
r_anal_esil_set_op(esil, "=[]", reil_poke);
|
|
r_anal_esil_set_op(esil, "|=[]", reil_mem_oreq);
|
|
r_anal_esil_set_op(esil, "^=[]", reil_mem_xoreq);
|
|
r_anal_esil_set_op(esil, "&=[]", reil_mem_andeq);
|
|
r_anal_esil_set_op(esil, "+=[]", reil_mem_addeq);
|
|
r_anal_esil_set_op(esil, "-=[]", reil_mem_subeq);
|
|
r_anal_esil_set_op(esil, "*=[]", reil_mem_muleq);
|
|
r_anal_esil_set_op(esil, "++=[]", reil_mem_inceq);
|
|
r_anal_esil_set_op(esil, "--=[]", reil_mem_deceq);
|
|
r_anal_esil_set_op(esil, "=[1]", reil_poke1);
|
|
r_anal_esil_set_op(esil, "=[2]", reil_poke2);
|
|
r_anal_esil_set_op(esil, "=[4]", reil_poke4);
|
|
r_anal_esil_set_op(esil, "=[8]", reil_poke8);
|
|
r_anal_esil_set_op(esil, "[1]", reil_peek1);
|
|
r_anal_esil_set_op(esil, "[2]", reil_peek2);
|
|
r_anal_esil_set_op(esil, "[4]", reil_peek4);
|
|
r_anal_esil_set_op(esil, "[8]", reil_peek8);
|
|
r_anal_esil_set_op(esil, "|=[1]", reil_mem_oreq1);
|
|
r_anal_esil_set_op(esil, "|=[2]", reil_mem_oreq2);
|
|
r_anal_esil_set_op(esil, "|=[4]", reil_mem_oreq4);
|
|
r_anal_esil_set_op(esil, "|=[8]", reil_mem_oreq8);
|
|
r_anal_esil_set_op(esil, "^=[1]", reil_mem_xoreq1);
|
|
r_anal_esil_set_op(esil, "^=[2]", reil_mem_xoreq2);
|
|
r_anal_esil_set_op(esil, "^=[4]", reil_mem_xoreq4);
|
|
r_anal_esil_set_op(esil, "^=[8]", reil_mem_xoreq8);
|
|
r_anal_esil_set_op(esil, "&=[1]", reil_mem_andeq1);
|
|
r_anal_esil_set_op(esil, "&=[2]", reil_mem_andeq2);
|
|
r_anal_esil_set_op(esil, "&=[4]", reil_mem_andeq4);
|
|
r_anal_esil_set_op(esil, "&=[8]", reil_mem_andeq8);
|
|
r_anal_esil_set_op(esil, "+=[1]", reil_mem_addeq1);
|
|
r_anal_esil_set_op(esil, "+=[2]", reil_mem_addeq2);
|
|
r_anal_esil_set_op(esil, "+=[4]", reil_mem_addeq4);
|
|
r_anal_esil_set_op(esil, "+=[8]", reil_mem_addeq8);
|
|
r_anal_esil_set_op(esil, "-=[1]", reil_mem_subeq1);
|
|
r_anal_esil_set_op(esil, "-=[2]", reil_mem_subeq2);
|
|
r_anal_esil_set_op(esil, "-=[4]", reil_mem_subeq4);
|
|
r_anal_esil_set_op(esil, "-=[8]", reil_mem_subeq8);
|
|
r_anal_esil_set_op(esil, "*=[1]", reil_mem_muleq1);
|
|
r_anal_esil_set_op(esil, "*=[2]", reil_mem_muleq2);
|
|
r_anal_esil_set_op(esil, "*=[4]", reil_mem_muleq4);
|
|
r_anal_esil_set_op(esil, "*=[8]", reil_mem_muleq8);
|
|
r_anal_esil_set_op(esil, "++=[1]", reil_mem_inceq1);
|
|
r_anal_esil_set_op(esil, "++=[2]", reil_mem_inceq2);
|
|
r_anal_esil_set_op(esil, "++=[4]", reil_mem_inceq4);
|
|
r_anal_esil_set_op(esil, "++=[8]", reil_mem_inceq8);
|
|
r_anal_esil_set_op(esil, "--=[1]", reil_mem_deceq1);
|
|
r_anal_esil_set_op(esil, "--=[2]", reil_mem_deceq2);
|
|
r_anal_esil_set_op(esil, "--=[4]", reil_mem_deceq4);
|
|
r_anal_esil_set_op(esil, "--=[8]", reil_mem_deceq8);
|
|
r_anal_esil_set_op(esil, "?{", reil_if);
|
|
r_anal_esil_set_op(esil, "}", reil_if_end);
|
|
|
|
return true;
|
|
}
|