WIP: Initial attempt to have BANK switching on ESIL

dist/plugins-cfg/plugins.def.cfg

@@ -202,6 +202,7 @@ debug.winkd
 egg.exec
 egg.xor
 esil.null
+esil.banksy
 esil.dummy
 esil.forth
 fs.ext2

libr/esil/Makefile

@@ -1,7 +1,7 @@
 include ../config.mk
 
 NAME=r_esil
-R2DEPS+=r_util r_reg
+R2DEPS+=r_util r_reg r_io
 
 CFLAGS+=-DR2_PLUGIN_INCORE
 CFLAGS:=-I.. -I$(LTOP)/asm/esil/include -DR2_PLUGIN_INCORE -Iesil -I$(TOP)/shlr $(CFLAGS)

libr/esil/p/banksy.mk

@@ -0,0 +1,9 @@
+OBJ_ESIL_BANKSY=esil_banksy.o
+
+STATIC_OBJ+=${OBJ_ESIL_BANKSY}
+TARGET_ESIL_BANKSY=esil_banksy.${EXT_SO}
+
+ALL_TARGETS+=${TARGET_ESIL_BANKSY}
+
+${TARGET_ESIL_BANKSY}: ${OBJ_ESIL_BANKSY}
+	${CC} -lr_io $(call libname,esil_banksy) ${LDFLAGS} ${CFLAGS} -o esil_banksy.${EXT_SO} ${OBJ_ESIL_BANKSY}

libr/esil/p/esil_banksy.c

@@ -0,0 +1,56 @@
+/* radare2 - LGPL - Copyright 2021-2023 - pancake */
+
+#define R_LOG_ORIGIN "esil.banksy"
+
+#include <r_lib.h>
+#include <r_core.h>
+#include <r_anal.h>
+
+char *obank = NULL;
+
+static bool esil_banksy_operation(REsil *esil) {
+	RCore *core = (RCore *)esil->user;
+	int obank = core->io->bank;
+	char *src = r_esil_pop (esil);
+	if (src) {
+		RIOBank *b = r_io_bank_use_byname (core->io, src);
+		if (!b) {
+			R_LOG_WARN ("iobank mode on");
+		}
+	}
+	R_LOG_INFO ("BANK: Switch to bank %s from %s", src);
+	return true;
+}
+
+static void *r_esil_banksy_init(REsil *esil) {
+	r_esil_set_op (esil, "BANK", esil_banksy_operation,
+		0, 0, R_ESIL_OP_TYPE_CUSTOM);
+	R_LOG_INFO ("esil.banksy: Activated");
+	return NULL;
+}
+
+static void r_esil_banksy_fini(REsil *esil, void *user) {
+	REsilOp *op = r_esil_get_op (esil, "BANK");
+	if (op && op->code == esil_banksy_operation) {
+		r_esil_del_op (esil, "BANK");
+	}
+	R_LOG_INFO ("esil.banksy: Deactivated");
+}
+
+REsilPlugin r_esil_plugin_banksy = {
+	.meta = {
+		.name = "banky",
+		.desc = "switch banks",
+		.license = "LGPL3",
+	},
+	.init = r_esil_banksy_init,
+	.fini = r_esil_banksy_fini
+};
+
+#ifndef R2_PLUGIN_INCORE
+R_API RLibStruct radare_plugin = {
+	.type = R_LIB_TYPE_ESIL,
+	.data = &r_esil_plugin_banksy,
+	.version = R2_VERSION
+};
+#endif

libr/include/r_esil.h

@@ -418,6 +418,7 @@ R_API void r_esil_trace_loopcount_increment(REsilTrace *etrace, ut64 addr);
 extern REsilPlugin r_esil_plugin_null;
 extern REsilPlugin r_esil_plugin_dummy;
 extern REsilPlugin r_esil_plugin_forth;
+extern REsilPlugin r_esil_plugin_banksy;
 
 #ifdef __cplusplus
 }

libr/io/io_bank.c

@@ -106,6 +106,40 @@ R_API ut32 r_io_bank_first(RIO *io) {
 	return bankid;
 }
 
+typedef struct {
+	bool found;
+	RIO *io;
+	const char *name;
+	RIOBank *bank;
+	ut32 bank_id;
+} BankByName;
+
+static bool bank_byname(void *user, void *data, ut32 id) {
+	BankByName *bbn = (BankByName *)data;
+	RIOBank *b = r_io_bank_get (bbn->io, id);
+	if (b && !strcmp (b->name, bbn->name)) {
+		bbn->bank = b;
+		bbn->bank_id = id;
+		bbn->found = true;
+		return false;
+	}
+	return true;
+}
+
+R_API RIOBank *r_io_bank_use_byname(RIO *io, const char *name) {
+	BankByName bbn = {
+		.io = io,
+		.name = name,
+		.found = false,
+	};
+	r_id_storage_foreach (io->banks, bank_byname, &bbn);
+	if (bbn.found) {
+		r_io_bank_use (io, bbn.bank_id);
+		return bbn.bank;
+	}
+	return NULL;
+}
+
 R_API bool r_io_bank_use(RIO *io, ut32 bankid) {
 	r_return_val_if_fail (io, false);
 	RIOBank *bank = r_io_bank_get (io, bankid);

libr/libs.mk

@@ -3,9 +3,9 @@
 ifeq ($(LIBS0),)
 LIBS0=util
 LIBS1=socket reg cons bp config crypto syscall
-LIBS2=search flag esil io
-LIBS3=arch fs # esil depends on reg and esil
-LIBS4=asm anal magic
+LIBS2=search flag esil
+LIBS3=arch io # esil depends on reg and esil
+LIBS4=asm anal magic fs
 LIBS5=lang egg bin
 LIBS6=debug
 LIBS7=core