psxbios: Add checks to strcat

[pcsx_rearmed.git] / libpcsxcore / psxbios.c

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 292d80d..4624bf4 100644 (file)
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -394,7 +394,12 @@ void psxBios_strcat() { // 0x15
 #ifdef PSXBIOS_LOG
        PSXBIOS_LOG("psxBios_%s: %s, %s\n", biosA0n[0x15], Ra0, Ra1);
 #endif
-
+       if (a0 == 0 || a1 == 0)
+       {
+               v0 = 0;
+               pc0 = ra;
+               return;
+       }
        while (*p1++);
        --p1;
        while ((*p1++ = *p2++) != '\0');