diff options
Diffstat (limited to 'cortex-m-rt/build.rs')
-rw-r--r-- | cortex-m-rt/build.rs | 35 |
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 } } |