/* Let's call mmap. Note that it is possible that mdp->top
is 0. In this case mmap will choose the address for us */
- mapto = mmap(mdp->top, mapbytes, PROT_READ | PROT_WRITE,
+ if(mdp->base==mdp->top)
+ mapto = mmap(mdp->top, mapbytes, PROT_READ | PROT_WRITE,
MAP_PRIVATE_OR_SHARED(mdp) | MAP_IS_ANONYMOUS(mdp) |
MAP_FIXED, MAP_ANON_OR_FD(mdp), foffset);
+ else {
+ size_t old_size = (char*)mdp->top - (char*)mdp->base;
+ mapto = mremap(mdp->base, old_size, old_size+size, 0);
+ }
if (mapto == (void *) -1/* That's MAP_FAILED */) {
char buff[1024];
abort();
}
- if (mdp->top == 0)
- mdp->base = mdp->breakval = mapto;
-
mdp->top = PAGE_ALIGN((char *) mdp->breakval + size);
result = (void *) mdp->breakval;
mdp->breakval = (char *) mdp->breakval + size;