bjorn3
cea93f7647
Or to be precise: RUST_TARGET_PATH=$(pwd)/targets cargo fix --edition \ --target targets/x86_64-unknown-kernel.json \ --target targets/i686-unknown-kernel.json \ --target targets/aarch64-unknown-kernel.json \ --target targets/riscv64-unknown-kernel.json \ -Zbuild-std=core,alloc --allow-dirty --bin kernel cargo fmt
36 lines
923 B
Rust
36 lines
923 B
Rust
use core::mem;
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pub struct StackTrace {
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pub fp: usize,
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pub pc_ptr: *const usize,
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}
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impl StackTrace {
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#[inline(always)]
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pub unsafe fn start() -> Option<Self> {
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unsafe {
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let mut fp: usize;
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#[cfg(target_arch = "x86")]
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core::arch::asm!("mov {}, ebp", out(reg) fp);
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#[cfg(target_arch = "x86_64")]
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core::arch::asm!("mov {}, rbp", out(reg) fp);
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let pc_ptr = fp.checked_add(mem::size_of::<usize>())?;
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Some(Self {
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fp,
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pc_ptr: pc_ptr as *const usize,
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})
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}
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}
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pub unsafe fn next(self) -> Option<Self> {
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unsafe {
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let fp = *(self.fp as *const usize);
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let pc_ptr = fp.checked_add(mem::size_of::<usize>())?;
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Some(Self {
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fp: fp,
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pc_ptr: pc_ptr as *const usize,
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})
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}
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}
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}
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