Redefining malloc in RTSC project

Chris Johnson1

Expert 1715 points

Other Parts Discussed in Thread: SYSBIOS

Hello,

I am attempting to redefine malloc() and free() in an RTSC application but am running into conflicts when linking.

I was initially getting errors similar to the following when trying to link:

error #10056: symbol "malloc" redefined: first defined in "myapp.obj"; redefined
in ".../package/cfg/app_pe66.oe66"

I found this thread:
http://e2e.ti.com/support/embedded/tirtos/f/355/p/334867/1169434

I followed the suggestion there of adding this line to my .cfg file:
var HeapStd = xdc.useModule('xdc.runtime.HeapStd');

I now get the errors similar to the following when linking:

error #10056: symbol "malloc" redefined: first defined in "myapp.obj"; redefined
in "/opt/ti/C6000CGT7.4.2/lib/rts6600_elf.lib<memory.obj>"

I am using SYSBIOS 6.34.04.22

Regards,
Chris
Signalogic, Inc.

over 10 years ago

0 ToddMullanix over 10 years ago

TI__Guru* 96960 points

Hi Chris,

SYSBIOS already redefines malloc. It redefines it to use the kernel's default heap. What do you want to change it to?

Todd

0 Alan DeMars over 10 years ago

TI__Mastermind 30830 points

Unfortunately, you have to provide your own definitions for all the APIs in the rts6600 library's memory.c file (ie memalign, calloc, realloc).
Otherwise, when the linker goes back to the rts library to resolve references to any of those APIs, it "discovers" the redefinitions of malloc() and free() there too.

Alan

0 Chris Johnson1 over 10 years ago in reply to Alan DeMars

Expert 1715 points

Thanks Alan. I'll take a look at what's defined in memory.c.

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Redefining malloc in RTSC project