Other operating systems and bare metal configurations

TestApe do not ship with a bare metal configuration, but it is possible to customize the use of the OS and standard C library by providing an alternative implementation, so that these dependencies can be replaced with handwritten equivalents.

All use of c lib functions are collected in linux_testape_ext.o and testape_messsages.o. These files can be removed from testape.a and replaced with your handcrafted equivalent, like it is shown below

ar d testape.a linux_testape_ext.o
ar d testape.a testape_messsages.o
ar r testape.a my_os.o

You need to fill my_os.c with the implementations of the functions listed in testape_ext.h and testape_customize.h.

If write a vnsprintf replacement, you should know that testape internally uses the following format specifiers %s %d %f %.8x %.3d %02x %04x %08x and %c.

To remove all file operations and reduce the footprint of the initialization code, it may be wise to customize the startup and hardwire it to a specific testcase. Just remove testape_init.o from testape.a like this

ar d testape.a testape_init.o

and implement whatever init function you need ( e.g. main ) in your test source code. You can call the desired test function where appropriate. The example below shows mytest being called from main, but you can call testmain or any other test from anywhere in your implementation.

  void main(void) {
     EXECUTE(mytest);
  }

You also need to control the behavior normally determined by the commandline options. You do that by providing the implementation listed in testape_init.h.

As the majority of the libc usage comes from the default init implementation a handcrafted main function in every test excutable will reduce requirements to a tiny c library to atoi, free, malloc, memcmp, memcpy, memset, strcat, strcmp, strcpy, strlen, strstr and vsnprintf

The package contains the sample my_os_sample.c the contains a sample implementation for all of the above. The commandline to use it and use to build sample26 looks like this

cp testape.a my_os_testape.a
gcc -c my_os_sample.c
ar d my_os_testape.a linux_testape_ext.o
ar d my_os_testape.a testape_messsages.o
ar d my_os_testape.a testape_init.o
ar r my_os_testape.a my_os_sample.o
testape gcc convert.c sample26.c my_os_testape.a

testape

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TestApe Release 791 available, Apr 2nd 2010

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