forked from M-Labs/libfringe
parent
1ea4b01eda
commit
75ca6f66e1
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@ -29,35 +29,26 @@ impl StackPointer {
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}
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pub unsafe fn init(stack: &Stack, f: unsafe extern "C" fn(usize) -> !) -> StackPointer {
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let g: usize;
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asm!(
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r#"
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# Push address of the trampoline.
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call 1f
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# Pop function.
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popl %ebx
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# Push argument.
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pushl %eax
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# Call it.
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call *%ebx
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1:
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# Pop address of the trampoline.
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popl %eax
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"#
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: "={eax}" (g)
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:
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: "memory"
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: "volatile"
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);
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#[naked]
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unsafe extern "C" fn trampoline() -> ! {
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asm!(
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r#"
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# Pop function.
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popl %ebx
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# Push argument.
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pushl %eax
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# Call it.
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call *%ebx
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"# ::: "memory" : "volatile");
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::core::intrinsics::unreachable()
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}
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let mut sp = StackPointer::new(stack);
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sp.push(0); // alignment
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sp.push(0); // alignment
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sp.push(0); // alignment
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sp.push(f as usize); // function
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sp.push(g as usize); // trampoline
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sp.push(trampoline as usize);
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sp
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}
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@ -2,6 +2,7 @@
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// Copyright (c) edef <edef@edef.eu>
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// See the LICENSE file included in this distribution.
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#![feature(asm)]
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#![cfg_attr(target_arch = "x86", feature(naked_functions, core_intrinsics))]
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#![no_std]
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//! libfringe is a low-level green threading library.
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