psxbios: Add checks for bcopy

[pcsx_rearmed.git] / libpcsxcore / psxbios.c

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 67a01e5..4019234 100644 (file)
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -739,15 +739,20 @@ void psxBios_tolower() { // 0x26
 
 void psxBios_bcopy() { // 0x27
        char *p1 = (char *)Ra1, *p2 = (char *)Ra0;
+       v0 = a0;
+       if (a0 == 0 || a2 > 0x7FFFFFFF)
+       {
+               pc0 = ra;
+               return;
+       }
        while ((s32)a2-- > 0) *p1++ = *p2++;
-
+       a2 = 0;
        pc0 = ra;
 }
 
 void psxBios_bzero() { // 0x28
        char *p = (char *)Ra0;
        while ((s32)a1-- > 0) *p++ = '\0';
-
        pc0 = ra;
 }