RVDK and malloc

[marcus23]

Posted on January 14, 2005 at 07:46

RVDK and malloc

[marcus23]

Posted on January 07, 2005 at 09:23

Hi all,

did anyone of you succeed in using malloc()? If so, is there something I have to take care of ( besides using free())? If we try to use malloc, the processor enters the FIQ-Handler before even calling malloc (?!?!?)

Thx for your help

[marcus23]

Posted on January 11, 2005 at 16:37

hello RISC,

could you send me a sample project with user defined stack and heap?

Thx

[andre2399]

Posted on January 13, 2005 at 07:19

Hello.

we'd like to configure the linker / compiler to use internal memory for the stack and external memory for the heap (e.g. to use malloc ). For such a kind of memory configuration, there is an example in an107, chapter 4.2.3. ''Two-region model'', where a procedure is described for 71x_init.s. There is made an import of __use_two_region_memory. However, we want to configure it all using the scatterfile and retarget.c. What do we have to do?

Our configuration is as follows:

---scatter loading file--------------------------

RAM_MODE 0x20000000 0x420FFFFF

{

RAM 0x20000000

{

71x_vect.o (Vect, +First)

71x_init.o (Init)

* (+RO)

* (+RW)

}

SRAM 0x62000000 UNINIT

{

* (+ZI)

}

}

---retarget.c--------------------------------------

__value_in_regs struct R0_R3

{

unsigned heap_base, stack_base, heap_limit, stack_limit;

}

__user_initial_stackheap(unsigned int R0, unsigned int SP, unsigned int R2, unsigned int SL)

{

struct R0_R3 config;

extern unsigned int Image$$SRAM$$ZI$$Base;

config.stack_base = SP;

config.heap_base = (unsigned int)Image$$SRAM$$ZI$$Base;

return config;

}

---------------------------------------------------

When executing the code, the error message ''Out of heap memory'' is displayed.

Where's the error?