Update QEMU

CMakeLists.txt

@@ -20,8 +20,8 @@ add_executable(runtime
 
 # QEMU
 include(CheckSymbolExists)
-check_symbol_exists("__x86_64__" "" USE_QEMU)
-if(USE_QEMU)
+check_symbol_exists("__ARM_ARCH" "" DONT_USE_QEMU)
+if(NOT DONT_USE_QEMU)
     add_subdirectory(qemu)
     target_sources(runtime PRIVATE
         src/syscall/main.cpp

README.md

@@ -1,7 +1,7 @@
 # Reborn Runtime
 This is a simple program allowing ARM32 code to easily call "native" code.
 
-By running an ARM32 program inside this runtime, it gains the ability to call `raw_trampoline`. This function copies its arguments and passes them to the `trampoline` function inside `libtrampoline.so`.
+By running an ARM32 program inside this runtime, it gains the ability to call `raw_trampoline()`. This function copies its arguments and passes them to the "host" code.
 
 The runtime also automatically uses QEMU on x86_64 systems.
 
@@ -10,10 +10,7 @@ The runtime also automatically uses QEMU on x86_64 systems.
 - "Host" code is the native code located in `libtrampoline.so`. It is running "alongside" the runtime.
 
 ## Example
-There is a simple C example [here](./example). It sends a given string to the host, which returns the string's length multiplied by two.
-
-## Early Returning
-`raw_trampoline` supports returning before the host code has finished executing. This can be enabled by passing `true` to `allow_early_return`. However, this is only supported in certain circumstances, can cause race-conditions, and prevents the guest code from receiving the host's return value.
+There is a simple C example [here](./example).
 
 ## Syscall Vs. Pipe Trampolines
 The runtime supports two methods of passing data between the guest and host.
@@ -22,7 +19,6 @@ The runtime supports two methods of passing data between the guest and host.
   - Only supported on x86_64.
 - Pipes
   - Data is passed through standard UNIX pipes.
-  - Supports early-returning.
   - Can be forced using an environmental variable.
 
 ## Licensing

qemu/CMakeLists.txt

@@ -6,8 +6,8 @@ if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.24.0)
 endif()
 
 # Archive
-set(QEMU_ARCHIVE "qemu-9.2.0.tar.xz")
-set(QEMU_HASH "f859f0bc65e1f533d040bbe8c92bcfecee5af2c921a6687c652fb44d089bd894")
+set(QEMU_ARCHIVE "qemu-9.2.1.tar.xz")
+set(QEMU_HASH "b7b0782ead63a5373fdfe08e084d3949a9395ec196180286b841f78a464d169c")
 
 # Library
 set(QEMU_LIBRARY "/lib/libqemu-arm.so")