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Implement get_fault_info for aarch64.

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This commit is contained in:
losfair 2019-10-06 18:27:35 +08:00
parent b304317682
commit 80d6c4cbc0
1 changed files with 62 additions and 2 deletions
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64
lib/runtime-core/src/fault.rs
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@ -246,6 +246,7 @@ extern "C" fn signal_trap_handler(
) {
unsafe {
let fault = get_fault_info(siginfo as _, ucontext);
println!("Fault: {:?}", fault);
let mut unwind_result: Box<dyn Any> = Box::new(());
@ -368,15 +369,74 @@ unsafe fn install_sighandler() {
sigaction(SIGINT, &sa_interrupt).unwrap();
}
#[derive(Debug, Clone)]
pub struct FaultInfo {
pub faulting_addr: *const c_void,
pub ip: *const c_void,
pub known_registers: [Option<u64>; 24],
}
#[cfg(target_arch = "aarch64")]
#[cfg(all(target_os = "linux", target_arch = "aarch64"))]
pub unsafe fn get_fault_info(siginfo: *const c_void, ucontext: *const c_void) -> FaultInfo {
unimplemented!("get_fault_info is not yet implemented for aarch64.");
#[allow(dead_code)]
#[repr(packed)]
struct sigcontext {
fault_address: u64,
regs: [u64; 31],
sp: u64,
pc: u64,
pstate: u64,
reserved: [u8; 4096],
}
#[allow(dead_code)]
#[repr(packed)]
struct ucontext {
unknown: [u8; 176],
uc_mcontext: sigcontext,
}
#[allow(dead_code)]
#[repr(C)]
struct siginfo_t {
si_signo: i32,
si_errno: i32,
si_code: i32,
si_addr: u64,
// ...
}
let siginfo = siginfo as *const siginfo_t;
let si_addr = (*siginfo).si_addr;
let ucontext = ucontext as *const ucontext;
let gregs = &(*ucontext).uc_mcontext.regs;
let mut known_registers: [Option<u64>; 24] = [None; 24];
known_registers[X64Register::GPR(GPR::R15).to_index().0] = Some(gregs[15] as _);
known_registers[X64Register::GPR(GPR::R14).to_index().0] = Some(gregs[14] as _);
known_registers[X64Register::GPR(GPR::R13).to_index().0] = Some(gregs[13] as _);
known_registers[X64Register::GPR(GPR::R12).to_index().0] = Some(gregs[12] as _);
known_registers[X64Register::GPR(GPR::R11).to_index().0] = Some(gregs[11] as _);
known_registers[X64Register::GPR(GPR::R10).to_index().0] = Some(gregs[10] as _);
known_registers[X64Register::GPR(GPR::R9).to_index().0] = Some(gregs[9] as _);
known_registers[X64Register::GPR(GPR::R8).to_index().0] = Some(gregs[8] as _);
known_registers[X64Register::GPR(GPR::RSI).to_index().0] = Some(gregs[6] as _);
known_registers[X64Register::GPR(GPR::RDI).to_index().0] = Some(gregs[7] as _);
known_registers[X64Register::GPR(GPR::RDX).to_index().0] = Some(gregs[2] as _);
known_registers[X64Register::GPR(GPR::RCX).to_index().0] = Some(gregs[1] as _);
known_registers[X64Register::GPR(GPR::RBX).to_index().0] = Some(gregs[3] as _);
known_registers[X64Register::GPR(GPR::RAX).to_index().0] = Some(gregs[0] as _);
known_registers[X64Register::GPR(GPR::RBP).to_index().0] = Some(gregs[5] as _);
known_registers[X64Register::GPR(GPR::RSP).to_index().0] = Some(gregs[28] as _);
FaultInfo {
faulting_addr: si_addr as usize as _,
ip: (*ucontext).uc_mcontext.pc as _,
known_registers,
}
}
#[cfg(all(target_os = "linux", target_arch = "x86_64"))]