From 506a454f7d366c86b3c91e2aab7f403714f84daa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergi=20=C3=80lvarez=20i=20Capilla?= <pancake@nowsecure.com>
Date: Mon, 14 Feb 2022 20:13:53 +0100
Subject: [PATCH] a cagar a la via

---
 libr/core/casm.c      | 10 +++++-----
 libr/core/cmd_print.c | 12 +++++++-----
 libr/core/disasm.c    |  5 ++---
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/libr/core/casm.c b/libr/core/casm.c
index 0bdef909859c4..10423b5a88772 100644
--- a/libr/core/casm.c
+++ b/libr/core/casm.c
@@ -485,7 +485,6 @@ static int is_hit_inrange(RCoreAsmHit *hit, ut64 start_range, ut64 end_range){
 R_API RList *r_core_asm_bwdisassemble(RCore *core, ut64 addr, int n, int len) {
 	RAsmOp op;
 	// if (n > core->blocksize) n = core->blocksize;
-	ut64 at;
 	ut32 idx = 0, hit_count;
 	int numinstr, asmlen, ii;
 	const int addrbytes = core->io->addrbytes;
@@ -494,8 +493,7 @@ R_API RList *r_core_asm_bwdisassemble(RCore *core, ut64 addr, int n, int len) {
 	if (!hits) {
 		return NULL;
 	}
-
-	len = R_MIN (len - len % addrbytes, addrbytes * addr);
+	len = R_MIN (len - (len % addrbytes), addrbytes * addr);
 	if (len < 1) {
 		r_list_free (hits);
 		return NULL;
@@ -509,7 +507,7 @@ R_API RList *r_core_asm_bwdisassemble(RCore *core, ut64 addr, int n, int len) {
 		free (buf);
 		return NULL;
 	}
-	if (!r_io_read_at (core->io, addr - len / addrbytes, buf, len)) {
+	if (!r_io_read_at (core->io, addr - (len / addrbytes), buf, len)) {
 		r_list_free (hits);
 		free (buf);
 		return NULL;
@@ -536,7 +534,9 @@ R_API RList *r_core_asm_bwdisassemble(RCore *core, ut64 addr, int n, int len) {
 			break;
 		}
 	}
-	at = addr - idx / addrbytes;
+
+	ut64 at = addr - idx / addrbytes;
+
 	r_asm_set_pc (core->rasm, at);
 	for (hit_count = 0; hit_count < n; hit_count++) {
 		int instrlen = r_asm_disassemble (core->rasm, &op,
diff --git a/libr/core/cmd_print.c b/libr/core/cmd_print.c
index 46ffcce3bec6e..cc2c794e104f9 100644
--- a/libr/core/cmd_print.c
+++ b/libr/core/cmd_print.c
@@ -1221,9 +1221,11 @@ static void cmd_pdj(RCore *core, const char *arg, ut8* block, int len) {
 	}
 	pj_a (pj);
 	ut8 *data = malloc (core->blocksize);
-	memcpy (data, core->block, core->blocksize);
-	r_core_print_disasm_json (core, core->offset, data, core->blocksize, nblines, pj);
-	free (data);
+	if (data) {
+		memcpy (data, core->block, core->blocksize);
+		r_core_print_disasm_json (core, core->offset, data, core->blocksize, nblines, pj);
+		free (data);
+	}
 	pj_end (pj);
 	r_cons_println (pj_string (pj));
 	pj_free (pj);
@@ -5947,7 +5949,7 @@ static int cmd_print(void *data, const char *input) {
 				pd_result = false;
 			}
 			break;
-		case 'j': // pdj
+		case 'j': // "pdj"
 			processed_cmd = true;
 			if (*input == 'D') {
 				cmd_pDj (core, input + 2);
@@ -6039,7 +6041,7 @@ static int cmd_print(void *data, const char *input) {
 								bs1 - (bs - bs % addrbytes));
 						}
 						core->num->value = r_core_print_disasm (core,
-								off, block1,
+								addr - bs1, block1,
 								R_MAX (bs, bs1), l, 0, NULL,
 								false, formatted_json, NULL,
 								NULL);
diff --git a/libr/core/disasm.c b/libr/core/disasm.c
index 8a928db494f2b..29db84199f37b 100644
--- a/libr/core/disasm.c
+++ b/libr/core/disasm.c
@@ -6271,7 +6271,6 @@ R_API int r_core_print_disasm_json(RCore *core, ut64 addr, ut8 *buf, int nb_byte
 				eprintf ("Too many backward instructions\n");
 				return false;
 			}
-
 			if (r_core_prevop_addr (core, core->offset, nb_opcodes, &addr)) {
 				nbytes = old_offset - addr;
 			} else if (!r_core_asm_bwdis_len (core, &nbytes, &addr, nb_opcodes)) {
@@ -6291,10 +6290,10 @@ R_API int r_core_print_disasm_json(RCore *core, ut64 addr, ut8 *buf, int nb_byte
 			count = R_MIN (nb_bytes, nbytes);
 			if (count > 0) {
 				r_io_read_at (core->io, addr, buf, count);
-				r_io_read_at (core->io, addr+count, buf+count, nb_bytes-count);
+				r_io_read_at (core->io, addr + count, buf + count, nb_bytes-count);
 			} else {
 				if (nb_bytes > 0) {
-					memset (buf, 0xff, nb_bytes);
+					memset (buf, core->io->Oxff, nb_bytes);
 				}
 			}
 		} else {