C-SKY Attributes (Using the GNU Compiler Collection (GCC))

#### 6.4.2.8 C-SKY Attributes ¶

These attributes are supported by the C-SKY back end:

`interrupt` ¶
`isr`

  These attributes apply to functions.

  Use these attributes to indicate that the specified function is an interrupt handler. The compiler generates function entry and exit sequences suitable for use in an interrupt handler when either of these attributes are present.

  Use of these options requires the `-mistack` command-line option to enable support for the necessary interrupt stack instructions. They are ignored with a warning otherwise. See C-SKY Options.