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authorHugues de Valon <hugues.devalon@arm.com>2021-01-24 17:15:05 +0000
committerHugues de Valon <hugues.devalon@arm.com>2021-02-02 13:04:31 +0000
commit5bdc56c00cfc5d675e628e346e493bd619aed46f (patch)
tree44e30afd624ad7f99cb1ccf0502029b5063a065c
parent02e1fd48d183c9a28dc7f78b68fded919a1b9338 (diff)
downloadrust-5bdc56c00cfc5d675e628e346e493bd619aed46f.tar.gz
rust-5bdc56c00cfc5d675e628e346e493bd619aed46f.zip
Add a new ABI to support cmse_nonsecure_call
This commit adds a new ABI to be selected via `extern
"C-cmse-nonsecure-call"` on function pointers in order for the compiler to
apply the corresponding cmse_nonsecure_call callsite attribute.
For Armv8-M targets supporting TrustZone-M, this will perform a
non-secure function call by saving, clearing and calling a non-secure
function pointer using the BLXNS instruction.

See the page on the unstable book for details.

Signed-off-by: Hugues de Valon <hugues.devalon@arm.com>
-rw-r--r--src/abi/mod.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/abi/mod.rs b/src/abi/mod.rs
index 6a025f2e88a..b2647e6c8d3 100644
--- a/src/abi/mod.rs
+++ b/src/abi/mod.rs
@@ -28,6 +28,7 @@ fn clif_sig_from_fn_abi<'tcx>(
         Conv::X86_64SysV => CallConv::SystemV,
         Conv::X86_64Win64 => CallConv::WindowsFastcall,
         Conv::ArmAapcs
+        | Conv::CCmseNonSecureCall
         | Conv::Msp430Intr
         | Conv::PtxKernel
         | Conv::X86Fastcall