bjorn3
33 lines
773 B
Rust
33 lines
773 B
Rust
use core::arch::asm;
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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 fp: usize;
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asm!("mov {}, fp", out(reg) fp);
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let pc_ptr = fp.checked_add(size_of::<usize>())?;
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Some(StackTrace {
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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(size_of::<usize>())?;
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Some(StackTrace {
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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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