From a5315743cdbeb10c3f0647f7ef184cd11dd39883 Mon Sep 17 00:00:00 2001
From: condret <condr3t@protonmail.com>
Date: Sat, 23 Nov 2024 04:55:02 +0100
Subject: [PATCH] Add r_esil_new_simple

---
 libr/esil/esil.c      | 51 +++++++++++++++++++++++++++++++++++++++++++
 libr/include/r_esil.h |  2 ++
 2 files changed, 53 insertions(+)

diff --git a/libr/esil/esil.c b/libr/esil/esil.c
index 8c420fe3ca768..6b8e452a77b30 100644
--- a/libr/esil/esil.c
+++ b/libr/esil/esil.c
@@ -3,6 +3,8 @@
 #define R_LOG_ORIGIN "esil"
 
 #include <r_anal.h>
+#include <r_io.h>
+#include <r_reg.h>
 
 #if __wasi__ || EMSCRIPTEN
 #define FE_OVERFLOW 0
@@ -156,6 +158,55 @@ R_API REsil *r_esil_new_ex(int stacksize, bool iotrap, ut32 addrsize,
 	return NULL;
 }
 
+static bool default_is_reg (void *reg, const char *name) {
+	RRegItem *ri = r_reg_get ((RReg *)reg, name, -1);
+	if (!ri) {
+		return false;
+	}
+	r_unref (ri);
+	return true;
+}
+
+static bool default_reg_read (void *reg, const char *name, ut64 *res, int *size) {
+	RRegItem *ri = r_reg_get ((RReg *)reg, name, -1);
+	if (!ri) {
+		return false;
+	}
+	*num = r_reg_get_value ((RReg *)reg, ri);
+	*size = ri->size;
+	r_unref (ri);
+	return true;
+}
+
+static ut32 default_reg_size (void *reg, const char *name) {
+	RRegItem *ri = r_reg_get ((RReg *)reg, name, -1);
+	if (!ri) {
+		return 0;
+	}
+	r_unref (ri);
+	return ri->size;
+}
+
+static REsilRegInterface simple_reg_if = {
+	.is_reg = default_is_reg,
+	.reg_read = default_reg_read,
+	.reg_write = (REsilRegWrite)r_reg_setv,
+	.reg_size = default_reg_size
+};
+
+static REsilMemInterface simple_mem_if = {
+	.mem_switch = (REsilMemSwitch)r_io_bank_use,
+	.mem_read = (REsilMemRead)r_io_read_at,
+	.mem_write = (REsilMemWrite)r_io_write_at
+};
+
+R_API REsil *r_esil_new_simple(ut32 addrsize, struct r_reg_t *reg, struct r_io_t *io) {
+	R_RETURN_VAL_IF_FAIL (reg && io, NULL);
+	simple_reg_if.reg = reg;
+	simple_mem_if.mem = io;
+	return r_esil_new_ex (4096, false, addrsize, &simple_reg_if, &simple_mem_if);
+}
+
 R_API bool r_esil_set_op(REsil *esil, const char *op, REsilOpCb code, ut32 push, ut32 pop, ut32 type) {
 	R_RETURN_VAL_IF_FAIL (code && R_STR_ISNOTEMPTY (op) && esil && esil->ops, false);
 	REsilOp *eop = ht_pp_find (esil->ops, op, NULL);
diff --git a/libr/include/r_esil.h b/libr/include/r_esil.h
index 5ed53eb97e284..378f550e75ec6 100644
--- a/libr/include/r_esil.h
+++ b/libr/include/r_esil.h
@@ -347,6 +347,8 @@ typedef struct r_esil_active_plugin_t {
 R_API REsil *r_esil_new(int stacksize, int iotrap, unsigned int addrsize);
 R_API REsil *r_esil_new_ex(int stacksize, bool iotrap, ut32 addrsize,
 	REsilRegInterface *reg_if, REsilMemInterface *mem_if);
+//this should replace existing r_esil_new
+R_API REsil *r_esil_new_simple(ut32 addrsize, struct r_reg_t *reg, struct r_io_t *io);
 R_API void r_esil_reset(REsil *esil);
 R_API void r_esil_set_pc(REsil *esil, ut64 addr);
 R_API bool r_esil_setup(REsil *esil, struct r_anal_t *anal, bool romem, bool stats, bool nonull);