KASSERT() that we don't.
When calculating the load address for the interpreter (e.g. ld.elf_so),
we need to take into account wether the exec'd process will run with
topdown memory or bottom up. We can not use the current vmspace's flags
to test for that, as this happens too early. Luckily the execpack already
knows what the new state will be later, so instead of testing the current
vmspace, pass the info as additional argument to struct emul
e_vm_default_addr.
Fix all such functions and adopt all callers.
we can correctly clean up on process exit or fork.
Without this, firefox attaches to a shared memory segment but doesn't
detach before exit. Thus once firefox causes an autoload for sysv_ipc
it cannot be unloaded since the segment still retains references.
- move the P_PAX_ flags out of #ifdef PAX_ASLR in pax.h
- add a generic pax_flags_active() function
- fix a comment in exec_elf.c; interp is not static
- KNF for return
- rename pax_aslr() to pax_aslr_mmap()
- rename pax_segvguard_cb() to pax_segvguard_cleanup_cb()
- merge uvm_kmguard.{c,h} into subr_kmem.c. It is only user there, and
makes it more consistent. Also, it allows us to enable KMEM_GUARD
without enabling DEBUG.
- rename uvm_kmguard_XXX to kmem_guard_XXX, for consistency
- improve kmem_guard_alloc() so that it supports allocations bigger than
PAGE_SIZE
- remove the canary value, and use directly the kmem header as underflow
pattern.
- fix some comments
(The UAF fifo is disabled for the moment; we actually need to register
the va and its size, and add a weight support not to consume too much
memory.)
mappings of file objects. move vnode-specific details of mmap()ing a vnode
from uvm_mmap() to the new vnode-specific vn_mmap(). add new uvm_mmap_dev()
and uvm_mmap_anon() convenience functions for mapping character devices
and anonymous memory, and replace all other calls to uvm_mmap() with those.
use the new fileop in drm2 so that libdrm can use mmap() to map things
like on other platforms (instead of the ioctl that we have used so far).
