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//! Analyze Error Codes
pub const PageFaultError = struct {
present: bool, write: bool, user: bool, reserved_write: bool, instruction_fetch: bool,
pub fn from_error_code(code: u64) PageFaultError {
return PageFaultError{
.present = (code & 1) != 0, .write = (code & 2) != 0, .user = (code & 4) != 0,
.reserved_write = (code & 8) != 0, .instruction_fetch = (code & 16) != 0,
};
}
pub fn is_not_present(self: PageFaultError) bool { return !self.present; }
pub fn is_write_access(self: PageFaultError) bool { return self.write; }
pub fn is_execute_access(self: PageFaultError) bool { return self.instruction_fetch; }
pub fn description(self: PageFaultError) []const u8 {
if (self.instruction_fetch) return if (self.present) "Execute on non-executable page" else "Execute on non-present page";
if (self.write) return if (self.present) "Write to read-only page" else "Write to non-present page";
return if (self.present) "Read from protected page" else "Read from non-present page";
}
};
pub const SelectorError = struct {
external: bool, table: u2, index: u13,
pub fn from_error_code(code: u64) SelectorError {
return SelectorError{ .external = (code & 1) != 0, .table = @truncate((code >> 1) & 0x3), .index = @truncate((code >> 3) & 0x1FFF) };
}
};
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