summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/ldso/dynlink.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index 642ecc30..a6484dd5 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -604,6 +604,19 @@ static void *map_library(int fd, struct dso *dso)
dso->loadmap->segs[i].p_vaddr = ph->p_vaddr;
dso->loadmap->segs[i].p_memsz = ph->p_memsz;
i++;
+ if (prot & PROT_WRITE) {
+ size_t brk = (ph->p_vaddr & PAGE_SIZE-1)
+ + ph->p_filesz;
+ size_t pgbrk = brk + PAGE_SIZE-1 & -PAGE_SIZE;
+ size_t pgend = brk + ph->p_memsz - ph->p_filesz
+ + PAGE_SIZE-1 & -PAGE_SIZE;
+ if (pgend > pgbrk && mmap_fixed(map+pgbrk,
+ pgend-pgbrk, prot,
+ MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS,
+ -1, off_start) == MAP_FAILED)
+ goto error;
+ memset(map + brk, 0, pgbrk-brk);
+ }
}
map = (void *)dso->loadmap->segs[0].addr;
map_len = 0;