minecraft-pi-reborn/dependencies/qemu/trampoline.patch

--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -17,6 +17,7 @@
  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 #define _ATFILE_SOURCE
+#include <dlfcn.h>
 #include "qemu/osdep.h"
 #include "qemu/cutils.h"
 #include "qemu/path.h"
@@ -9070,6 +9071,17 @@ _syscall5(int, sys_move_mount, int, __from_dfd, const char *, __from_pathname,
            int, __to_dfd, const char *, __to_pathname, unsigned int, flag)
 #endif
 
+// g2h For Trampoline
+static CPUState *_trampoline_g2h_cpu = NULL;
+static void *_trampoline_g2h(uint32_t guest_addr) {
+    if (guest_addr == 0) {
+        return NULL;
+    }
+    return g2h(_trampoline_g2h_cpu, guest_addr);
+}
+// Trampoline Function
+typedef void (*_trampoline_t)(typeof(_trampoline_g2h) *g2h, uint32_t id, uint32_t *args);
+
 /* This is an internal helper for do_syscall so that it is easier
  * to have a single return point, so that actions, such as logging
  * of syscall results, can be performed.
@@ -9095,6 +9107,27 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
     void *p;
 
     switch(num) {
+    case 0x1337: {
+        // Load Trampoline
+        static _trampoline_t _trampoline = NULL;
+        if (_trampoline == NULL) {
+            // Open Library
+            void *_trampoline_handle = dlopen("libmedia-layer-trampoline.so", RTLD_NOW);
+            // Load Function
+            if (_trampoline_handle != NULL) {
+                _trampoline = dlsym(_trampoline_handle, "trampoline");
+            }
+        }
+        if (_trampoline == NULL) {
+            // Failed To Load
+            qemu_log_mask(LOG_UNIMP, "Unable To Load Media Layer Trampoline: %s\n", dlerror());
+            return -TARGET_ENOSYS;
+        }
+        // Call Trampoline
+        _trampoline_g2h_cpu = cpu;
+        _trampoline(_trampoline_g2h, arg1, g2h(cpu, arg2));
+        return 0;
+    }
     case TARGET_NR_exit:
         /* In old applications this may be used to implement _exit(2).
            However in threaded applications it is used for thread termination,