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SCIOPTA - Real-Time Kernel

User’s Manual Manual Version 4.1 10-3

SCIOPTA - Real-Time Kernel

10 Error Handling

10.3.1 Error Information

When an error hook is called from the kernel, all information about the error are transferred in 32-bit error word

(parameter errcode). Please consult the SCIOPTA - Kernel, Reference Manual for detailed description of the

SCIOPTA error word. There is also an additional 32-bit extra error word available to the user.

Figure 10-1: 32-bit Error Word (Parameter: errcode)

Function Code Error Code Error Type

12 Bits 12 Bits8 Bits

32 Bits

The Function Code defines from which SCIOPTA system call the error was initiated.

The Error Code contains the specific error information.

The Error Type inform

s about the source and type of error.

There are three error types in a SCIOPTA kernel.

• SC_ERR_SYSTEM_FATAL, system wide fatal error.

• SC_ERR_MODULE_FATAL, module wide fatal error.

• SC_ERR_PROCESS_FATAL, process wide fa

tal error.

There are three error warnings in a SCIOPTA kernel.

• SC_ERR_SYSTEM_WARNING, sy

stem wide warning.

• SC_ERR_MODULE_WARNING, module wide warning.

• SC_ERR_PROCESS_WARNING, process wide warning.

10.3.2 Error Hook Registering

An error hook is registered by using the sc_miscErrorHookRegister system call.

If the error hook is registered from within the system module it is

registered as a global error hook. In this case the

error hook registering will be done in the start hook.

If the error hook is registered from within a module which is not the system module it will be registered as a module

erro

r hook.

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CompuLab SBC-X270 Manual de usuario Pagina 83