Add __syscall assembly

16 files changed, 10 insertions, 2 deletions

diff --git a/asm/inline.rs b/asm/inline.rs
index 9a0c66e..688604e 100644
--- a/asm/inline.rs
+++ b/asm/inline.rs
@@ -175,6 +175,13 @@ pub unsafe fn __wfi() {
     asm!("wfi");
 }
 
+/// Semihosting syscall.
+#[inline(always)]
+pub unsafe fn __syscall(mut nr: u32, arg: u32) -> u32 {
+    asm!("bkpt #0xab", inout("r0") nr, in("r1") arg);
+    nr
+}
+
 // v7m *AND* v8m.main, but *NOT* v8m.base
 #[cfg(any(armv7m, armv8m_main))]
 pub use self::v7m::*;
diff --git a/asm/lib.rs b/asm/lib.rs
index 93d56fb..ec46d5b 100644
--- a/asm/lib.rs
+++ b/asm/lib.rs
@@ -46,7 +46,7 @@ macro_rules! shims {
             pub unsafe extern "C" fn $name(
                 $($arg: $argty),*
             ) $(-> $ret)? {
-                crate::inline::$name($($arg)*)
+                crate::inline::$name($($arg),*)
             }
         )+
     };
@@ -72,9 +72,10 @@ shims! {
     fn __udf();
     fn __wfe();
     fn __wfi();
+    fn __syscall(nr: u32, arg: u32) -> u32;
 }
 
-// v7m *AND* v8m.main, but *NOT* v8m.base 
+// v7m *AND* v8m.main, but *NOT* v8m.base
 #[cfg(any(armv7m, armv8m_main))]
 shims! {
     fn __basepri_max(val: u8);
diff --git a/bin/thumbv6m-none-eabi-lto.a b/bin/thumbv6m-none-eabi-lto.a
index 6ee0427..93d2953 100644
--- a/bin/thumbv6m-none-eabi-lto.a
+++ b/bin/thumbv6m-none-eabi-lto.a
diff --git a/bin/thumbv6m-none-eabi.a b/bin/thumbv6m-none-eabi.a
index 34dba4a..5fbc73c 100644
--- a/bin/thumbv6m-none-eabi.a
+++ b/bin/thumbv6m-none-eabi.a
diff --git a/bin/thumbv7em-none-eabi-lto.a b/bin/thumbv7em-none-eabi-lto.a
index 781ea4c..608cbf1 100644
--- a/bin/thumbv7em-none-eabi-lto.a
+++ b/bin/thumbv7em-none-eabi-lto.a
diff --git a/bin/thumbv7em-none-eabi.a b/bin/thumbv7em-none-eabi.a
index 05d98ba..665ff58 100644
--- a/bin/thumbv7em-none-eabi.a
+++ b/bin/thumbv7em-none-eabi.a
diff --git a/bin/thumbv7em-none-eabihf-lto.a b/bin/thumbv7em-none-eabihf-lto.a
index b0a2204..feecade 100644
--- a/bin/thumbv7em-none-eabihf-lto.a
+++ b/bin/thumbv7em-none-eabihf-lto.a
diff --git a/bin/thumbv7em-none-eabihf.a b/bin/thumbv7em-none-eabihf.a
index bd416b5..7517720 100644
--- a/bin/thumbv7em-none-eabihf.a
+++ b/bin/thumbv7em-none-eabihf.a
diff --git a/bin/thumbv7m-none-eabi-lto.a b/bin/thumbv7m-none-eabi-lto.a
index a6ff71a..bf84238 100644
--- a/bin/thumbv7m-none-eabi-lto.a
+++ b/bin/thumbv7m-none-eabi-lto.a
diff --git a/bin/thumbv7m-none-eabi.a b/bin/thumbv7m-none-eabi.a
index 1f57c90..803a0ba 100644
--- a/bin/thumbv7m-none-eabi.a
+++ b/bin/thumbv7m-none-eabi.a
diff --git a/bin/thumbv8m.base-none-eabi-lto.a b/bin/thumbv8m.base-none-eabi-lto.a
index d157ab5..559bf13 100644
--- a/bin/thumbv8m.base-none-eabi-lto.a
+++ b/bin/thumbv8m.base-none-eabi-lto.a
diff --git a/bin/thumbv8m.base-none-eabi.a b/bin/thumbv8m.base-none-eabi.a
index 6142436..abfa14f 100644
--- a/bin/thumbv8m.base-none-eabi.a
+++ b/bin/thumbv8m.base-none-eabi.a
diff --git a/bin/thumbv8m.main-none-eabi-lto.a b/bin/thumbv8m.main-none-eabi-lto.a
index f5849b1..1a381f8 100644
--- a/bin/thumbv8m.main-none-eabi-lto.a
+++ b/bin/thumbv8m.main-none-eabi-lto.a
diff --git a/bin/thumbv8m.main-none-eabi.a b/bin/thumbv8m.main-none-eabi.a
index 63a0dd0..4d4d5c6 100644
--- a/bin/thumbv8m.main-none-eabi.a
+++ b/bin/thumbv8m.main-none-eabi.a
diff --git a/bin/thumbv8m.main-none-eabihf-lto.a b/bin/thumbv8m.main-none-eabihf-lto.a
index 5dae3aa..ab82609 100644
--- a/bin/thumbv8m.main-none-eabihf-lto.a
+++ b/bin/thumbv8m.main-none-eabihf-lto.a
diff --git a/bin/thumbv8m.main-none-eabihf.a b/bin/thumbv8m.main-none-eabihf.a
index 3989cda..2d4703a 100644
--- a/bin/thumbv8m.main-none-eabihf.a
+++ b/bin/thumbv8m.main-none-eabihf.a