Merge #263p-sh-v0.5.3c-m-sh-v0.3.5

263: Import cortex-m-semihosting and panic-semihosting into this repo r=adamgreig a=jonas-schievink

Motivation:

* Allows writing QEMU tests for `cortex-m`'s functionality that use semihosting to control QEMU. Previously these crates would pull in another cortex-m version, which doesn't work. Now they have a `path` dependency on the root crate.
* Lets us share the outline-inline-assembly setup and `cargo-xtask` in general.
* Lets us share CI and bot setup between more crates.
* 2 fewer repos to triage and keep track of (I'll transfer their issues after this is merged).

I also want to import cortex-m-rt, but I'll do that in a later PR.

CI was updated to build-test all crates with all or most feature combinations, like it did before.

Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/cortex-m-semihosting/src/macros.rs b/cortex-m-semihosting/src/macros.rs
new file mode 100644
index 0000000..d10cd3f
--- /dev/null
+++ b/cortex-m-semihosting/src/macros.rs
@@ -0,0 +1,119 @@
+/// Variable argument version of `syscall`
+#[macro_export]
+macro_rules! syscall {
+    ($nr:ident) => {
+        $crate::syscall1($crate::nr::$nr, 0)
+    };
+    ($nr:ident, $a1:expr) => {
+        $crate::syscall($crate::nr::$nr, &[$a1 as usize])
+    };
+    ($nr:ident, $a1:expr, $a2:expr) => {
+        $crate::syscall($crate::nr::$nr, &[$a1 as usize, $a2 as usize])
+    };
+    ($nr:ident, $a1:expr, $a2:expr, $a3:expr) => {
+        $crate::syscall($crate::nr::$nr, &[$a1 as usize, $a2 as usize,
+                                           $a3 as usize])
+    };
+    ($nr:ident, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
+        $crate::syscall($crate::nr::$nr, &[$a1 as usize, $a2 as usize,
+                                           $a3 as usize, $a4 as usize])
+    };
+}
+
+/// Macro version of `syscall1`.
+#[macro_export]
+macro_rules! syscall1 {
+    ($nr:ident, $a1:expr) => {
+        $crate::syscall1($crate::nr::$nr, $a1 as usize)
+    };
+}
+
+/// Macro for printing to the HOST standard output.
+///
+/// This is similar to the `print!` macro in the standard library. Both will panic on any failure to
+/// print.
+#[macro_export]
+macro_rules! hprint {
+    ($s:expr) => {
+        $crate::export::hstdout_str($s)
+    };
+    ($($tt:tt)*) => {
+        $crate::export::hstdout_fmt(format_args!($($tt)*))
+    };
+}
+
+/// Macro for printing to the HOST standard output, with a newline.
+///
+/// This is similar to the `println!` macro in the standard library. Both will panic on any failure to
+/// print.
+#[macro_export]
+macro_rules! hprintln {
+    () => {
+        $crate::export::hstdout_str("\n")
+    };
+    ($s:expr) => {
+        $crate::export::hstdout_str(concat!($s, "\n"))
+    };
+    ($s:expr, $($tt:tt)*) => {
+        $crate::export::hstdout_fmt(format_args!(concat!($s, "\n"), $($tt)*))
+    };
+}
+
+/// Macro for printing to the HOST standard error.
+///
+/// This is similar to the `eprint!` macro in the standard library. Both will panic on any failure
+/// to print.
+#[macro_export]
+macro_rules! heprint {
+    ($s:expr) => {
+        $crate::export::hstderr_str($s)
+    };
+    ($($tt:tt)*) => {
+        $crate::export::hstderr_fmt(format_args!($($tt)*))
+    };
+}
+
+/// Macro for printing to the HOST standard error, with a newline.
+///
+/// This is similar to the `eprintln!` macro in the standard library. Both will panic on any failure
+/// to print.
+#[macro_export]
+macro_rules! heprintln {
+    () => {
+        $crate::export::hstderr_str("\n")
+    };
+    ($s:expr) => {
+        $crate::export::hstderr_str(concat!($s, "\n"))
+    };
+    ($s:expr, $($tt:tt)*) => {
+        $crate::export::hstderr_fmt(format_args!(concat!($s, "\n"), $($tt)*))
+    };
+}
+
+/// Macro that prints and returns the value of a given expression for quick and
+/// dirty debugging.
+///
+/// Works exactly like `dbg!` in the standard library, replacing `eprintln!`
+/// with `heprintln!`.
+#[macro_export]
+macro_rules! dbg {
+    () => {
+        $crate::heprintln!("[{}:{}]", file!(), line!());
+    };
+    ($val:expr) => {
+        // Use of `match` here is intentional because it affects the lifetimes
+        // of temporaries - https://stackoverflow.com/a/48732525/1063961
+        match $val {
+            tmp => {
+                $crate::heprintln!("[{}:{}] {} = {:#?}",
+                    file!(), line!(), stringify!($val), &tmp);
+                tmp
+            }
+        }
+    };
+    // Trailing comma with single argument is ignored
+    ($val:expr,) => { $crate::dbg!($val) };
+    ($($val:expr),+ $(,)?) => {
+        ($($crate::dbg!($val)),+,)
+    };
+}