Function reg_read

icicle-cortexm/src/unicorn_api.rs:154–176

(ctx: *mut c_void, regid: c_int, value: *mut c_void)

#[inline]
pub unsafe extern "C" fn reg_read(ctx: *mut c_void, regid: c_int, value: *mut c_void) -> uc_err {
    let ctx = &mut *ctx.cast::<Context>();

    match regid as uc_arm_reg::Type {
        uc_arm_reg::UC_ARM_REG_XPSR => {
            let xpsr_reg = *ctx.uc_vars.get(regid as usize).unwrap_or_else(|| invalid_reg(regid));
            let vm = unsafe { &mut *ctx.vm };
            *value.cast::<u32>() = vm.cpu.read_reg(xpsr_reg) as u32;
        }
        uc_arm_reg::UC_ARM_REG_PC => {
            let vm = unsafe { &mut *ctx.vm };
            *value.cast::<u32>() = vm.cpu.read_pc() as u32;
        }
        _ => {
            let data = ctx.get_reg_slice(regid).unwrap_or_else(|| invalid_reg(regid));
            match data.try_into().ok() {
                Some(data) => *value.cast::<u32>() = u32::from_ne_bytes(data),
                None => copy_data_cold(data, value),
            }
        }
    };
    UC_ERR_OK
}

#[cold]
unsafe fn copy_data_cold(data: &[u8], value: *mut std::ffi::c_void) {