_sbrk error , how to solve for STM32F4 ?
Guest
#2947265
I am trying to compile a C program for STM32F4 microcontroller with yagarto I have run into following error
I have been told to implement this sbrk by myself however first I decided to ask in the forum if somebody faced this error before ? now my question did anybody face this error before ? how did you solve it ? or could you solve it ? thanks
Guest
#2947319
google finds 33.600 entries for "undefined _sbrk" No, you are not the first one who did not read the documentation and checked for a solution using google... You should read the newlib documentation, to understand the reason and possible solution. After carefully reading this you might look ath this: http://www.yagarto.de/download/yagarto/syscalls.c Oliver
Guest
#2949086
hello forum, I tried to copy a syscall.c from the newlib documents --> http://sourceware.org/newlib/ caddr_t sbrk(int incr) { extern char _end; /* Defined by the linker */ static char *heap_end; char *prev_heap_end; if (heap_end == 0) { heap_end = &_end; } prev_heap_end = heap_end; if (heap_end + incr > stack_ptr) { write (1, "Heap and stack collision\n", 25); abort (); } heap_end += incr; return (caddr_t) prev_heap_end; } my question what does the micro do when abort() is called ? does the micro stop running or does the program crash ? I dont want my micro board fry - its 50.- US$ once my another program crashed and my micro fried indeed Reply |