c - Linked list issue with ARM processor -

i'm trying create linked list in c run on arm processor (not sure exact processor specs, -mcpu=arm7tdmi passed compiler) using gcc. here's code:

#include <posapi.h> #include <posapi_all.h>  const appinfo appinfo={     "pos-simple example",     "app-test",     "1.0",     "pcteam",     "demo program",     "",     0,     0,     0,     "" };  typedef struct st_dllnode {     struct st_dllnode * next;     struct st_dllnode * prev;     void * data; } dllnode;  typedef struct {     dllnode* first;     dllnode* cur;     uchar size; } listcontainer;  typedef listcontainer* list;  list createlist(void) {     list listcontainer;     listcontainer = (list) malloc(sizeof(listcontainer));     listcontainer->first = null;     listcontainer->cur = null;     listcontainer->size = 0; // exception occurs here     return listcontainer; }  int event_main(st_event_msg *msg) {     systeminit();     return 0; }   int main(void) {     list list;     systeminit();     while (1)     {         list = createlist();         free(list);         beep();     } } 

for unknown reasons, execution of code stops on line marked, , device i'm using begins dumping exception message:

prefetchaborthandler:2007ffc4,aa...... (more addresses follows) prefetchabort addr: (another addr); status:02020a01 

i have no idea why code runs fine in windows, when compiled arm, gives such error. ideas?

solution: try add 1 barrier() or similar macro function in code.

details:

list createlist(void) {     list listcontainer;     listcontainer = (list) malloc(sizeof(listcontainer));     smb();      // linux memory barrier api. replace os similar api     listcontainer->first = null;     listcontainer->cur = null;     listcontainer->size = 0; // exception occurs here     return listcontainer; } 

reason: target arm processor may execute code out of order. listcontainer may not alloced successfully, "listcontainer->size = 0" executed first of all.