You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.2 KiB
49 lines
1.2 KiB
6 years ago
|
extern "C" {
|
||
|
|
fn stext();
|
||
|
|
fn etext();
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Returns the current frame pointer.
|
||
|
|
#[inline(always)]
|
||
|
|
#[cfg(target_arch = "aarch64")]
|
||
|
|
pub fn fp() -> usize {
|
||
|
|
let ptr: usize;
|
||
|
|
unsafe {
|
||
|
|
asm!("mov $0, x29" : "=r"(ptr));
|
||
|
|
}
|
||
|
|
|
||
|
|
ptr
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Returns the current link register.
|
||
|
|
#[inline(always)]
|
||
|
|
#[cfg(target_arch = "aarch64")]
|
||
|
|
pub fn lr() -> usize {
|
||
|
|
let ptr: usize;
|
||
|
|
unsafe {
|
||
|
|
asm!("mov $0, x30" : "=r"(ptr));
|
||
|
|
}
|
||
|
|
|
||
|
|
ptr
|
||
|
|
}
|
||
|
|
|
||
|
|
// Print the backtrace starting from the caller
|
||
|
|
pub fn backtrace() {
|
||
|
|
#[cfg(target_arch = "aarch64")]
|
||
|
|
unsafe {
|
||
|
|
let mut current_pc = lr();
|
||
|
|
let mut current_fp = fp();
|
||
|
|
let mut stack_num = 0;
|
||
|
|
println!("pc {:#018X} fp {:#018X}", current_pc, current_fp);
|
||
|
|
while current_pc >= stext as usize && current_pc <= etext as usize && current_fp as usize != 0 {
|
||
|
|
println!("#{} {:#018X}", stack_num, current_pc);
|
||
|
|
stack_num = stack_num + 1;
|
||
|
|
current_fp = *(current_fp as *const usize);
|
||
|
|
if current_fp as usize != 0 {
|
||
|
|
current_pc = *(current_fp as *const usize).offset(1);
|
||
|
|
}
|
||
|
|
println!("pc {:#018X} fp {:#018X}", current_pc, current_fp);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|