From: notaz <notasas@gmail.com>
Date: Sun, 28 Aug 2022 20:51:40 +0000 (+0300)
Subject: misc: get rid of an unaligned read
X-Git-Tag: r24~339
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c654475393e6595bc00245178ae5bf253e318ef;hp=26e3e2aa7525fd4e63e64192dfbb68950e0e4c5a;p=pcsx_rearmed.git

misc: get rid of an unaligned read

96c6ec7055ecef55b3dd221c86b796512bf52107 introduced an unaligned read
which is undefined behavior in C, even if most hardware allows it
(but some very old ARMs don't). Perf. doesn't matter here so read
byte-by-byte.

notaz/pcsx_rearmed#261
---

diff --git a/libpcsxcore/misc.c b/libpcsxcore/misc.c
index 7aa4fef2..c06a8a4f 100644
--- a/libpcsxcore/misc.c
+++ b/libpcsxcore/misc.c
@@ -55,10 +55,11 @@ struct iso_directory_record {
 	char name			[1];
 };
 
-void mmssdd( char *b, char *p )
+static void mmssdd( char *b, char *p )
 {
 	int m, s, d;
-	int block = SWAP32(*((uint32_t*) b));
+	unsigned char *ub = (void *)b;
+	int block = (ub[3] << 24) | (ub[2] << 16) | (ub[1] << 8) | ub[0];
 
 	block += 150;
 	m = block / 4500;			// minutes