ADS 1.2 compiler port question

Kernel
1

nobody wrote on Friday, March 03, 2006:

I want port free rtos use ARM Developer Suite 1.2,but the compiler have some limit: it can’t modify “SP” value when use inline assemble,  so i can’t write “portRESTORE_CONTEXT” and “portSAVE_CONTEXT” in c code;it can’t support a function to be “nake” or “task”.
how can i do?

kevin

2

nobody wrote on Friday, March 03, 2006:

This is the second message in two days on this.  Is this to do with the new Keil/ARM combined offering?

I think in RVDS you can write assembly functions directly in C code just by placing an asm (or __asm?) before the function.

eg

asm void aFunction( void )
{
    asm statements go here
}

3

nobody wrote on Monday, March 06, 2006:

Though i can write assmbly function directly in C code, but can’t direct access “SP”,“LR” register, so i can’t use inline assembly MACRO in C code, because
some freertos code like “portRESTORE_CONTEXT”, “portSAVE_CONTEXT” “portENTER_SWITCHING_ISR” direct use “SP” “LR” register, how can i do?

kevin

4

nobody wrote on Monday, March 06, 2006:

If this is a hard limitation in the compiler then it is going to be difficult.  Are there any modes of operation where it allows access?  It seems very restrictive.

5

nobody wrote on Friday, September 08, 2006:

Have you figured out the solution for this yet?
I am having the same problem.

6

nobody wrote on Saturday, September 09, 2006:

Have a look at the files in FreeRTOS\Source\portable\RVDS\ARM_CM3.  These use RVDS but are not for the ARM7. But I’m sure you could copy how it was done.