# Vault 7: Projects

This publication series is about specific projects related to the Vault 7 main publication.

### Protego

# MPLAB XC16 C-Compiler

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Common C Interface
 2012-2013 Microchip Technology Inc. DS50002071C-page 37
2.5.9 EEPROM Objects
The __eeprom qualifier may be used to indicate that variables should be positioned in
EEPROM.
Use the native keywords discussed in the Differences section to look up information on
the semantics of this qualifier.
Some devices may not implement EEPROM. Use of this qualifier for such devices will
generate a warning. Stack-based (auto and parameter) variables cannot use the
__eeprom specifier.
2.5.9.1 EXAMPLE
The following shows a variable qualified using __eeprom.
__eeprom int serialNos[4];
2.5.9.2 DIFFERENCES
The 8-bit compilers have used the qualifier, eeprom, to indicate this meaning for some
devices.
The 16-bit compilers have used the space attribute to allocate variables to the memory
space used for EEPROM.
2.5.9.3 MIGRATION TO THE CCI
For 8-bit compilers, change any occurrence of the eeprom qualifier, as in the following
example:
eeprom
char title[20];
to __eeprom, i.e., __eeprom char title[20];
For 16-bit compilers, change any occurrence of the eedata space attribute, as in the
following
int mainSw __attribute__ ((space(eedata)));
to
int __eeprom mainSw;
2.5.9.4 CAVEATS
XC8 does not implement the __eeprom qualifiers for any PIC18 devices; this qualifier
will work as expected for other 8-bit devices.
2.5.10 Interrupt Functions
The __interrupt(type) specifier may be used to indicate that a function is to act
as an interrupt service routine. The type is a comma-separated list of keywords that
indicate information about the interrupt function.
The current interrupt types are:
<empty>
Implement the default interrupt function
low_priority
The interrupt function corresponds to the low priority interrupt source (XC8  PIC18
only)
high_priority
The interrupt function corresponds to the high priority interrupt source (XC8)

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