Cross compilers

Properties of KasperskyOS cross compilers

The cross compilers included in KasperskyOS Community Edition support processors that have the arm architecture.

The KasperskyOS Community Edition toolchain includes the following tools for cross compilation:

• GCC:
  • arm-kos-gcc
  • arm-kos-g++
• Binutils:
  • AS Assembler: arm-kos-as
  • LD Linker: arm-kos-ld

In addition to standard macros, an additional macro __KOS__=1 is defined in GCC. Using this macro lets you simplify porting of the software code to KasperskyOS, and also simplifies development of platform-independent applications.

To view the list of standard macros of GCC, run the following command:

echo '' | arm-kos-gcc -dM -E -

Linker operation specifics

When building the executable file of an application, by default the linker links the following libraries in the specified order:

1. libc – standard C library.
2. libm – library that implements the mathematical functions of the standard C language library.
3. libvfs_stubs – library that contains stubs of I/O functions (for example, open, socket, read, write).
4. libkos – library consisting of two parts. The first part provides the C interface for accessing KasperskyOS kernel functions. It is available through the header files in the coresrv folder, for example: #include <coresrv/vmm/vmm_api.h>. The second part of the libkos library is a wrapper over the first part and contains additional synchronization functions: mutex, semaphore, event. Other libraries (including libc) interact with the kernel through the libkos library.
5. libenv – client library of the subsystem for configuring the environment of applications (environmental variables, arguments of the main function, and custom configurations).
6. libsrvtransport-u – internal library with the implementation of transport of interprocess communication between KasperskyOS kernel services.

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