Zase arm cortex zahada

[Jaroslav Buchta]

pouzivam u STM32F103 tools 4.7-2012-q4 z 
https://launchpad.net/gcc-arm-embedded - pro M4 stm32F4  zda se funguje 
OK ale u teto M3 jsem narazil na problem s funkci malloc, zda se, ze se 
ten problem na internetu resi, ale reseni jsem nenasel - koukam, ze uz 
je novejsi verze toolchainu, zkusim, ale zatim jsem zjistil, ze pomuze 
vynulovani cele pameti, coz me samozrejme neuspokojuje (ne jen 
inicializace dat a nulovani bss ale cele pameti, pokud ma nejake 
promenne v asm mimo sekce v ld scriptu, tak by to byl problem).
Nevi nekdo pricinu? Vlastni fce malloc je evidentne psana v assembleru, 
zdrojak jsem zatim nelokalizoval a pri krokovani jsem zjistil houby...

Skript pouzivam tento - predpokladam, ze chybi nejaka sekce pro knihovny 
v asm...:


*/

/* Entry Point */
ENTRY(Reset_Handler)

/* Highest address of the user mode stack */
_estack = 0x20004000;    /* end of 16K RAM */

/* Generate a link error if heap and stack don't fit into RAM */
_Min_Heap_Size = 6000;      /* required amount of heap  */
_Min_Stack_Size = 0x200; /* required amount of stack */

ENTRY(Reset_Handler)

MEMORY
{
   rom (rx)      : ORIGIN = 0x08000000, LENGTH = 128K
   ram (xrw)     : ORIGIN = 0x20000000, LENGTH = 16K
}

SECTIONS
{
   .text :
   {
     KEEP(*(.isr_vector))
     *(.text)           /* .text sections (code) */
     *(.text*)          /* .text* sections (code) */
     *(.rodata)         /* .rodata sections (constants, strings, etc.) */
     *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
     . = ALIGN(4);
     KEEP (*(.init))
     KEEP (*(.fini))
     . = ALIGN(4);
     _etext = .;        /* define a global symbols at end of code */
     _exit = .;
     } >rom

    /* .ARM.exidx is sorted, so has to go in its own output section.*/
    .ARM.exidx : {
         __exidx_start = .;
         *(.ARM.exidx* .gnu.linkonce.armexidx.*)
         __exidx_end = .;
     } >rom

     _sidata = .;         /* global needed for startup_stm3210x_md_vl.S */

   /*now start ram area with initialized data section */
   .data :
   {
     _sdata = .;        /* global needed for startup_stm3210x_md_vl.S */
     *(.data)
     *(.data*)
     . = ALIGN(4);
     _edata = .;        /* global needed for startup_stm3210x_md_vl.S */
   } >ram AT>rom

   /* uninitialized data section bss*/
   .bss :
   {
       . = ALIGN(4);
     _sbss = .;         /* global needed for startup_stm3210x_md_vl.S */
     __bss_start__ = _sbss;
     *(.bss)
     *(.bss*)
     *(COMMON)
     . = ALIGN(4);
     _ebss = .;        /* global needed for startup_stm3210x_md_vl.S */
     __bss_end__ = _ebss;
   } >ram


  /* User_heap_stack section, used to check that there is enough RAM left */
   ._user_heap_stack :
   {
     . = ALIGN(4);
     PROVIDE ( end = . );
     PROVIDE ( _end = . );
     . = . + _Min_Heap_Size;
     . = . + _Min_Stack_Size;
     . = ALIGN(4);
   } >ram


   .ARM.attributes 0 : { KEEP (*(.ARM.attributes)) }

   /* Remove debug information from the standard libraries */
   /DISCARD/ : {
       *(.note.GNU-stack)
     libc.a ( * )
     libgcc.a ( * )
     libm.a ( * )
   }
}