static void
pyxa_instance_dealloc(PyObject *self) {
//printf("About to destroy PyXa instance at %p\n", &(pyxai(self)));
xa_destroy(&(pyxai(self)));
if(pyxamem(self)) {
//printf("About to unmap memory at %p\n", pyxamem(self));
munmap(pyxamem(self), PAGE_SIZE);
}
//printf("About to call PyObject_DEL on self at %p\n", self);
PyObject_DEL(self);
}
int main (int argc, char **argv)
{
xa_instance_t xai;
char *filename = NULL;
FILE *f = NULL;
unsigned char *memory = NULL;
uint32_t offset = 0;
uint32_t address = 0;
/* this is the domain ID that we are looking at */
uint32_t dom = atoi(argv[1]);
/* this is the file name to write the memory image to */
filename = strndup(argv[2], 50);
/* initialize the xen access library */
if (xa_init_vm_id_lax(dom, &xai) == XA_FAILURE){
perror("failed to init XenAccess library");
goto error_exit;
}
/* open the file for writing */
if ((f = fopen(filename, "w+")) == NULL){
perror("failed to open file for writing");
goto error_exit;
}
/* assuming that we are looking at xen domain, and not image file */
while (address < xai.m.xen.size){
/* access the memory */
memory = xa_access_pa(&xai, address, &offset, PROT_READ);
/* write memory to file */
if (memory){
/* memory mapped, just write to file */
size_t written = fwrite(memory, 1, xai.page_size, f);
if (written != xai.page_size){
perror("failed to write memory to file");
goto error_exit;
}
munmap(memory, xai.page_size);
}
else{
/* memory not mapped, write zeros to maintain offset */
unsigned char *zeros = malloc(xai.page_size);
memset(zeros, 0, xai.page_size);
size_t written = fwrite(zeros, 1, xai.page_size, f);
if (written != xai.page_size){
perror("failed to write zeros to file");
goto error_exit;
}
free(zeros);
}
/* move on to the next page */
address += xai.page_size;
}
error_exit:
if (memory){ munmap(memory, xai.page_size); }
if (f){ fclose(f); }
/* cleanup any memory associated with the XenAccess instance */
xa_destroy(&xai);
return 0;
}
int cleanup(xa_instance_t *xai){
xa_destroy(xai);
}