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Diffstat (limited to 'cortex-m-rt/build.rs')
-rw-r--r--cortex-m-rt/build.rs35
1 files changed, 27 insertions, 8 deletions
diff --git a/cortex-m-rt/build.rs b/cortex-m-rt/build.rs
index 1098dca..1b5c3d1 100644
--- a/cortex-m-rt/build.rs
+++ b/cortex-m-rt/build.rs
@@ -9,7 +9,7 @@ fn main() {
let target = env::var("TARGET").unwrap();
has_fpu(&target);
- is_armv6m(&target);
+ let is_armv6m = is_armv6m(&target);
if target.starts_with("thumbv") {
cc::Build::new().file("asm.s").compile("asm");
@@ -17,8 +17,8 @@ fn main() {
// Put the linker script somewhere the linker can find it
let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
- let link_x = include_bytes!("link.x");
- if env::var_os("CARGO_FEATURE_DEVICE").is_some() {
+ let link_x = include_bytes!("link.x.in");
+ let mut f = if env::var_os("CARGO_FEATURE_DEVICE").is_some() {
let mut f = File::create(out.join("link.x")).unwrap();
writeln!(
@@ -29,12 +29,28 @@ fn main() {
INCLUDE device.x"#
).unwrap();
f.write_all(link_x).unwrap();
+ f
} else {
- File::create(out.join("link.x"))
- .unwrap()
- .write_all(link_x)
- .unwrap();
+ let mut f = File::create(out.join("link.x")).unwrap();
+ f.write_all(link_x).unwrap();
+ f
};
+
+ let max_int_handlers = if is_armv6m { 32 } else { 240 };
+
+ // checking the size of the interrupts portion of the vector table is sub-architecture dependent
+ writeln!(
+ f,
+ r#"
+ASSERT(__einterrupts - __eexceptions <= 0x{:x}, "
+There can't be more than {} interrupt handlers. This may be a bug in
+your device crate, or you may have registered more than 240 interrupt
+handlers.");
+"#,
+ max_int_handlers * 4,
+ max_int_handlers
+ ).unwrap();
+
println!("cargo:rustc-link-search={}", out.display());
println!("cargo:rerun-if-changed=build.rs");
@@ -47,8 +63,11 @@ fn has_fpu(target: &str) {
}
}
-fn is_armv6m(target: &str) {
+fn is_armv6m(target: &str) -> bool {
if target.starts_with("thumbv6m-") {
println!("cargo:rustc-cfg=armv6m");
+ true
+ } else {
+ false
}
}