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[fceu.git] / drivers / gp2x / squidgehack.c

diff --git a/drivers/gp2x/squidgehack.c b/drivers/gp2x/squidgehack.c
index f831bd4..67f21b0 100644 (file)
--- a/drivers/gp2x/squidgehack.c
+++ b/drivers/gp2x/squidgehack.c
@@ -12,25 +12,28 @@ extern char **g_argv;
 int mmuhack(void)
 {
        char kocmd[1024];
-       int i, mmufd = open("/dev/mmuhack", O_RDWR);
-
-       if(mmufd < 0) {
-               strcpy(kocmd, "/sbin/insmod ");
-               strncpy(kocmd+13, g_argv[0], 1023-13);
-               kocmd[1023] = 0;
-               for (i = strlen(kocmd); i > 0; i--)
-                       if (kocmd[i] == '/') { kocmd[i] = 0; break; }
-               strcat(kocmd, "/mmuhack.o");
-
-               printf("Installing NK's kernel module for Squidge MMU Hack (%s)...\n", kocmd);
-               system(kocmd);
-               mmufd = open("/dev/mmuhack", O_RDWR);
-       }
+       int i, mmufd;
+
+       /* some programs like some versions of gpSP use some weird version of mmuhack.o
+        * which doesn't seem to work. What's even worse they leave their mmuhack loaded on exit.
+        * So we must remove whatever may be left and always reload _our_ mmuhack.o */
+       system("/sbin/rmmod mmuhack");
+
+       strcpy(kocmd, "/sbin/insmod ");
+       strncpy(kocmd+13, g_argv[0], 1023-13);
+       kocmd[1023] = 0;
+       for (i = strlen(kocmd); i > 0; i--)
+               if (kocmd[i] == '/') { kocmd[i] = 0; break; }
+       strcat(kocmd, "/mmuhack.o");
+
+       printf("Installing NK's kernel module for Squidge MMU Hack (%s)...\n", kocmd);
+       system(kocmd);
+       mmufd = open("/dev/mmuhack", O_RDWR);
        if(mmufd < 0) return 0;
-        
+
        close(mmufd);
        return 1;
-}       
+}
 
 
 /* Unload MMU Hack kernel module after closing all memory devices*/