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Update clobber to match ARM ARM #426

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Update clobber to match ARM ARM #426

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6 changes: 4 additions & 2 deletions runtime/src/syscalls_impl_arm.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ unsafe impl RawSyscalls for crate::TockSyscalls {
// Safety: This matches the invariants required by the documentation on
// RawSyscalls::yield1
// the use of `clobber_abi` allows us this to run on both Thumb-1 and Thumb-2
// see https://doc.rust-lang.org/nightly/reference/inline-assembly.html#abi-clobbers
unsafe {
asm!("svc 0",
inlateout("r0") r0 => _, // a1
Expand All @@ -17,7 +18,7 @@ unsafe impl RawSyscalls for crate::TockSyscalls {
// r13 is the stack pointer and must be restored by the callee.
// r15 is the program counter.

clobber_abi("C"), // a2, a3, a4, ip (r12), lr (r14)
clobber_abi("aapcs"), // r[0-3], r12, r14, s[0-15], d[0-7], d[16-31]
);
}
}
Expand All @@ -26,6 +27,7 @@ unsafe impl RawSyscalls for crate::TockSyscalls {
// Safety: This matches the invariants required by the documentation on
// RawSyscalls::yield2
// the use of `clobber_abi` allows us this to run on both Thumb-1 and Thumb-2
// see https://doc.rust-lang.org/nightly/reference/inline-assembly.html#abi-clobbers
unsafe {
asm!("svc 0",
inlateout("r0") r0 => _, // a1
Expand All @@ -38,7 +40,7 @@ unsafe impl RawSyscalls for crate::TockSyscalls {
// r13 is the stack pointer and must be restored by the callee.
// r15 is the program counter.

clobber_abi("C"), // a3, a4, ip (r12), lr (r14)
clobber_abi("aapcs"), // r[0-3], r12, r14, s[0-15], d[0-7], d[16-31]
);
}
}
Expand Down