All examples now return exit code zero

examples/mps3-an536/reference/el2_hello-armv8r-none-eabihf.out

@@ -19,7 +19,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/el2_hello.rs",
-        line: 27,
+        line: 28,
         column: 5,
     },
     can_unwind: true,

examples/mps3-an536/reference/hello-armv8r-none-eabihf.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 20,
         column: 5,
     },
     can_unwind: true,

examples/mps3-an536/reference/svc-a32-armv8r-none-eabihf.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 21,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/mps3-an536/reference/svc-t32-armv8r-none-eabihf.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/mps3-an536/src/bin/el2_hello.rs

@@ -24,6 +24,7 @@ fn main() -> ! {
         }
     }
 
+    mps3_an536::want_panic();
     panic!("I am an example panic");
 }
 

examples/mps3-an536/src/bin/hello.rs

@@ -4,9 +4,10 @@
 #![no_main]
 
 use aarch32_rt::entry;
-use mps3_an536 as _;
 use semihosting::println;
 
+use mps3_an536 as _;
+
 /// The entry-point to the Rust application.
 ///
 /// It is called by the start-up code in `aarch32-rt`.
@@ -15,5 +16,6 @@ fn main() -> ! {
     let x = 1.0f64;
     let y = x * 2.0;
     println!("Hello, this is semihosting! x = {:0.3}, y = {:0.3}", x, y);
+    mps3_an536::want_panic();
     panic!("I am an example panic");
 }

examples/mps3-an536/src/bin/svc-a32.rs

@@ -18,7 +18,7 @@ fn main() -> ! {
     println!("x = {}, y = {}, z = {:0.3}", x, y, z);
     aarch32_cpu::svc!(0xABCDEF);
     println!("x = {}, y = {}, z = {:0.3}", x, y, z);
-    panic!("I am an example panic");
+    semihosting::process::exit(0);
 }
 
 /// This is our SVC exception handler

examples/mps3-an536/src/bin/svc-t32.rs

@@ -20,7 +20,7 @@ fn main() -> ! {
         svc12_from_t32();
     }
     println!("x = {}, y = {}, z = {:0.3}", x, y, z);
-    panic!("I am an example panic");
+    semihosting::process::exit(0);
 }
 
 /// This is our SVC exception handler

examples/mps3-an536/src/lib.rs

@@ -64,6 +64,8 @@ pub const VIRTUAL_TIMER_PPI: arm_gic::IntId = arm_gic::IntId::ppi(11);
 #[cfg(not(arm_architecture = "v8-r"))]
 compile_error!("This example is only compatible to the ARMv8-R architecture");
 
+static WANT_PANIC: AtomicBool = AtomicBool::new(false);
+
 /// Called when the application raises an unrecoverable `panic!`.
 ///
 /// Prints the panic to the console and then exits QEMU using a semihosting
@@ -72,7 +74,16 @@ compile_error!("This example is only compatible to the ARMv8-R architecture");
 #[cfg(target_os = "none")]
 fn panic(info: &core::panic::PanicInfo) -> ! {
     semihosting::println!("PANIC: {:#?}", info);
-    semihosting::process::abort();
+    if WANT_PANIC.load(Ordering::Relaxed) {
+        semihosting::process::exit(0);
+    } else {
+        semihosting::process::abort();
+    }
+}
+
+/// Set the panic function as no longer returning a failure code via semihosting
+pub fn want_panic() {
+    WANT_PANIC.store(true, Ordering::Relaxed);
 }
 
 #[derive(Clone, Debug)]

examples/versatileab/reference/hello-armv4t-none-eabi.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/hello-armv5te-none-eabi.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/hello-armv7a-none-eabi.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/hello-armv7a-none-eabihf.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/hello-armv7r-none-eabi.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/hello-armv7r-none-eabihf.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/hello-thumbv4t-none-eabi.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/hello-thumbv5te-none-eabi.out

@@ -3,7 +3,7 @@ PANIC: PanicInfo {
     message: I am an example panic,
     location: Location {
         file: "src/bin/hello.rs",
-        line: 18,
+        line: 19,
         column: 5,
     },
     can_unwind: true,

examples/versatileab/reference/svc-a32-armv4t-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-a32-armv5te-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-a32-armv7a-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-a32-armv7a-none-eabihf.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-a32-armv7r-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-a32-armv7r-none-eabihf.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-a32-thumbv4t-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-a32-thumbv5te-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0xabcdef
 In svc_handler, with arg=0x456789
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-a32.rs",
-        line: 22,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-t32-armv4t-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-t32-armv5te-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-t32-armv7a-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-t32-armv7a-none-eabihf.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-t32-armv7r-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-t32-armv7r-none-eabihf.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}

examples/versatileab/reference/svc-t32-thumbv4t-none-eabi.out

@@ -2,13 +2,3 @@ x = 1, y = 2, z = 3.000
 In svc_handler, with arg=0x000012
 In svc_handler, with arg=0x000034
 x = 1, y = 2, z = 3.000
-PANIC: PanicInfo {
-    message: I am an example panic,
-    location: Location {
-        file: "src/bin/svc-t32.rs",
-        line: 23,
-        column: 5,
-    },
-    can_unwind: true,
-    force_no_backtrace: false,
-}