static int parse_vmflags(char *buf, struct vma_area *vma_area)
{
char *tok;
bool shared = false;
bool maywrite = false;
if (!buf[0])
return 0;
tok = strtok(buf, " \n");
if (!tok)
return 0;
#define _vmflag_match(_t, _s) (_t[0] == _s[0] && _t[1] == _s[1])
do {
/* open() block */
if (_vmflag_match(tok, "sh"))
shared = true;
else if (_vmflag_match(tok, "mw"))
maywrite = true;
/* mmap() block */
if (_vmflag_match(tok, "gd"))
vma_area->e->flags |= MAP_GROWSDOWN;
else if (_vmflag_match(tok, "lo"))
vma_area->e->flags |= MAP_LOCKED;
else if (_vmflag_match(tok, "nr"))
vma_area->e->flags |= MAP_NORESERVE;
else if (_vmflag_match(tok, "ht"))
vma_area->e->flags |= MAP_HUGETLB;
/* madvise() block */
if (_vmflag_match(tok, "sr"))
vma_area->e->madv |= (1ul << MADV_SEQUENTIAL);
else if (_vmflag_match(tok, "rr"))
vma_area->e->madv |= (1ul << MADV_RANDOM);
else if (_vmflag_match(tok, "dc"))
vma_area->e->madv |= (1ul << MADV_DONTFORK);
else if (_vmflag_match(tok, "dd"))
vma_area->e->madv |= (1ul << MADV_DONTDUMP);
else if (_vmflag_match(tok, "mg"))
vma_area->e->madv |= (1ul << MADV_MERGEABLE);
else if (_vmflag_match(tok, "hg"))
vma_area->e->madv |= (1ul << MADV_HUGEPAGE);
else if (_vmflag_match(tok, "nh"))
vma_area->e->madv |= (1ul << MADV_NOHUGEPAGE);
/* vmsplice doesn't work for VM_IO and VM_PFNMAP mappings. */
if (_vmflag_match(tok, "io") || _vmflag_match(tok, "pf")) {
/*
* VVAR area mapped by the kernel as
* VM_IO | VM_PFNMAP| VM_DONTEXPAND | VM_DONTDUMP
*/
if (!vma_area_is(vma_area, VMA_AREA_VVAR))
vma_area->e->status |= VMA_UNSUPP;
}
/*
* Anything else is just ignored.
*/
} while ((tok = strtok(NULL, " \n")));
#undef _vmflag_match
if (shared && maywrite)
vma_area->e->fdflags = O_RDWR;
else
vma_area->e->fdflags = O_RDONLY;
vma_area->e->has_fdflags = true;
if (vma_area->e->madv)
vma_area->e->has_madv = true;
return 0;
}
static int parse_vmflags(char *buf, struct vma_area *vma_area)
{
char *tok;
if (!buf[0])
return 0;
tok = strtok(buf, " \n");
if (!tok)
return 0;
#define _vmflag_match(_t, _s) (_t[0] == _s[0] && _t[1] == _s[1])
do {
/* mmap() block */
if (_vmflag_match(tok, "gd"))
vma_area->vma.flags |= MAP_GROWSDOWN;
else if (_vmflag_match(tok, "lo"))
vma_area->vma.flags |= MAP_LOCKED;
else if (_vmflag_match(tok, "nr"))
vma_area->vma.flags |= MAP_NORESERVE;
else if (_vmflag_match(tok, "ht"))
vma_area->vma.flags |= MAP_HUGETLB;
/* madvise() block */
if (_vmflag_match(tok, "sr"))
vma_area->vma.madv |= (1ul << MADV_SEQUENTIAL);
else if (_vmflag_match(tok, "rr"))
vma_area->vma.madv |= (1ul << MADV_RANDOM);
else if (_vmflag_match(tok, "dc"))
vma_area->vma.madv |= (1ul << MADV_DONTFORK);
else if (_vmflag_match(tok, "dd"))
vma_area->vma.madv |= (1ul << MADV_DONTDUMP);
else if (_vmflag_match(tok, "mg"))
vma_area->vma.madv |= (1ul << MADV_MERGEABLE);
else if (_vmflag_match(tok, "hg"))
vma_area->vma.madv |= (1ul << MADV_HUGEPAGE);
else if (_vmflag_match(tok, "nh"))
vma_area->vma.madv |= (1ul << MADV_NOHUGEPAGE);
/*
* Anything else is just ignored.
*/
} while ((tok = strtok(NULL, " \n")));
#undef _vmflag_match
if (vma_area->vma.madv)
vma_area->vma.has_madv = true;
return 0;
}
