68 lines
1.8 KiB
Rust
68 lines
1.8 KiB
Rust
use core::intrinsics;
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macro_rules! defer {
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($($symbol:ident),+ -> $routine:ident) => {
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$(
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#[naked]
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#[no_mangle]
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pub extern "C" fn $symbol() {
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unsafe {
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asm!(concat!("b ", stringify!($routine)));
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intrinsics::unreachable();
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}
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}
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)+
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}
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}
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// FIXME only `__aeabi_memcmp` should be defined like this. The `*4` and `*8` variants should be
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// defined as aliases of `__aeabi_memcmp`
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defer!(__aeabi_memcmp, __aeabi_memcmp4, __aeabi_memcmp8 -> memcmp);
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// FIXME same issue as `__aeabi_memcmp*`
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defer!(__aeabi_memcpy, __aeabi_memcpy4, __aeabi_memcpy8 -> memcpy);
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// FIXME same issue as `__aeabi_memcmp*`
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defer!(__aeabi_memmove, __aeabi_memmove4, __aeabi_memmove8 -> memmove);
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macro_rules! memset {
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($($symbol:ident),+) => {
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$(
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#[naked]
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#[no_mangle]
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pub extern "C" fn $symbol() {
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unsafe {
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asm!("mov r3, r1
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mov r1, r2
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mov r2, r3
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b memset");
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intrinsics::unreachable();
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}
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}
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)+
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}
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}
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// FIXME same issue as `__aeabi_memcmp*`
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memset!(__aeabi_memset, __aeabi_memset4, __aeabi_memset8);
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macro_rules! memclr {
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($($symbol:ident),+) => {
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$(
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#[naked]
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#[no_mangle]
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pub extern "C" fn $symbol() {
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unsafe {
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asm!("mov r2, r1
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mov r1, #0
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b memset");
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intrinsics::unreachable();
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}
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}
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)+
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}
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}
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// FIXME same issue as `__aeabi_memcmp*`
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memclr!(__aeabi_memclr, __aeabi_memclr4, __aeabi_memclr8);
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