SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download two short videos (registration required) highlighting:

System Workbench for STM32

You are viewing a reply to Programming in pure assembler  

Programming in pure assembler



For this you should pass options to the linker (in the linker options miscellaneous tab):

  • -nostdlib will avoid linking standard libraries and startup files; it combines two options:
    • -nostartfiles which avoids the startup files
    • -nodefaultlibs which bypasses the standard libraries (including the C library)
  • However, if ever you link compiled C code, you may need to explicitly add the following option:
    • -lgcc to link the libgcc.a compiler helper library

Note that not using the default startup files mean you will have to replace them by suitable code and, at least, provide the vector table. Note you may have also to edit or replace the link editor script file (the .ld file placed at the root of your project).

Anyway, as you will be tweaking the compiler toolchain, I advise you look at the GCC, AS and LD documentation (there are links to these in the “Documentation ” section fo the wb site).

Hope this helps,

Bernard (Ac6)


Newest Forum Posts

  1. Building project - subdir.mk error by nupurkohadkar1997, 2019-12-06 18:10
  2. openOCD Wrong device detected by maxim221, 2019-12-06 12:32
  3. STM32429I_Discovery board with printf float support problem by johannes.visser@msc-technologies.eu, 2019-12-05 16:08
  4. malloc heap issue with CubeMX Project by johannes.visser@msc-technologies.eu, 2019-12-05 16:04
  5. Debugger not working by Daniel Jack Morley, 2019-11-27 21:46
  6. Compiler change problem by Lucian Pop, 2019-11-20 17:41
  7. Sample programs and compiling by jjtimer, 2019-11-20 10:31
  8. Unit test issues for STM32 by Rinkedevries, 2019-11-18 10:32
  9. Ubuntu 19.04 Debug problems by costantino, 2019-11-17 19:17
  10. Compile without eclipse by JSStabl, 2019-11-14 15:55

Last-Modified Blogs