STM32H7 and calloc failure

[Manu Abraham]

Hi,

I am using a STMH743 running an LWIP example, added in mbedTLS to the mix.

Eventually, got into a certificate parse issue,

narrowing it down:

I found that calloc failed:

 (890) x509_crt_parse_der_core:

 (899) x509_crt_parse_der_core: mbedtls_calloc(), crt->raw.p=NULL, len:995

Tried searching a bit on calloc failure, came up with this link:

https://www.keil.com/support/docs/4094.htm

But that appears to match ( ? ) the startup file that I do have:

;*******************************************************************************
; User Stack and Heap initialization
;*******************************************************************************
                 IF      :DEF:__MICROLIB
                
                 EXPORT  __initial_sp
                 EXPORT  __heap_base
                 EXPORT  __heap_limit
                
                 ELSE
                
                 IMPORT  __use_two_region_memory
                 EXPORT  __user_initial_stackheap
                 
__user_initial_stackheap
 
                 LDR     R0, =  Heap_Mem
                 LDR     R1, =(Stack_Mem + Stack_Size)
                 LDR     R2, = (Heap_Mem +  Heap_Size)
                 LDR     R3, = Stack_Mem
                 BX      LR
 
                 ALIGN
 
                 ENDIF
 
                 END
 
;************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE*****

I am at a loss, how to go forward.

Can someone help ?

Thanks,

Manu

[Manu Abraham]

Replying to my own post ..

Played around with the Heap size,

This fixed the calloc() issue.

Sorry about the noise.

Thanks,

Manu

[Tesla DeLorean]

For others, stack and heap are defined in startup.s, the memory involved can be established via a scatter file

;*******************************************************************************
;
; Amount of memory (in bytes) allocated for Stack
; Tailor this value to your application needs
; <h> Stack Configuration
;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>
 
Stack_Size      EQU     0x0800
 
                AREA    STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem       SPACE   Stack_Size
__initial_sp
 
 
; <h> Heap Configuration
;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>
 
Heap_Size       EQU     0x2000
 
                AREA    HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem        SPACE   Heap_Size
__heap_limit
 
;***************************************************************************** 

  RW_RAM1 0x60000000 UNINIT 0x00040000  {  ; RW data
    *(HEAP)  ; external SRAM
  } 

[Manu Abraham]

Thanks, Clive1

I have a faint memory, (you or someone else ?)

A mention about stack and heap requirements running a web server with and without TLS/SSL quite a while back ?

Could not find that discussion, anymore though.

Thanks,

Manu