Revision fc3d1bad1edf08871275cf469a64e12dae4eba96 authored by Brad Smith on 19 October 2018, 12:52:39 UTC, committed by Peter Maydell on 06 November 2018, 10:52:23 UTC
Use MAP_STACK in qemu_alloc_stack() on OpenBSD.
Added to our 6.4 release.
MAP_STACK Indicate that the mapping is used as a stack. This
flag must be used in combination with MAP_ANON and
MAP_PRIVATE.
Implement MAP_STACK option for mmap(). Synchronous faults (pagefault and
syscall) confirm the stack register points at MAP_STACK memory, otherwise
SIGSEGV is delivered. sigaltstack() and pthread_attr_setstack() are modified
to create a MAP_STACK sub-region which satisfies alignment requirements.
Observe that MAP_STACK can only be set/cleared by mmap(), which zeroes the
contents of the region -- there is no mprotect() equivalent operation, so
there is no MAP_STACK-adding gadget.
Signed-off-by: Brad Smith <brad@comstyle.com>
Reviewed-by: Kamil Rytarowski <n54@gmx.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20181019125239.GA13884@humpty.home.comstyle.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
1 parent 03c1ca1
| File | Mode | Size |
|---|---|---|
| can | ||
| Makefile.objs | -rw-r--r-- | 821 bytes |
| checksum.c | -rw-r--r-- | 5.1 KB |
| clients.h | -rw-r--r-- | 2.5 KB |
| colo-compare.c | -rw-r--r-- | 34.3 KB |
| colo-compare.h | -rw-r--r-- | 785 bytes |
| colo.c | -rw-r--r-- | 5.8 KB |
| colo.h | -rw-r--r-- | 3.4 KB |
| dump.c | -rw-r--r-- | 7.0 KB |
| eth.c | -rw-r--r-- | 15.9 KB |
| filter-buffer.c | -rw-r--r-- | 6.3 KB |
| filter-mirror.c | -rw-r--r-- | 12.1 KB |
| filter-replay.c | -rw-r--r-- | 2.6 KB |
| filter-rewriter.c | -rw-r--r-- | 13.4 KB |
| filter.c | -rw-r--r-- | 7.9 KB |
| hub.c | -rw-r--r-- | 8.6 KB |
| hub.h | -rw-r--r-- | 705 bytes |
| l2tpv3.c | -rw-r--r-- | 19.5 KB |
| net.c | -rw-r--r-- | 45.5 KB |
| netmap.c | -rw-r--r-- | 12.4 KB |
| queue.c | -rw-r--r-- | 8.0 KB |
| slirp.c | -rw-r--r-- | 26.8 KB |
| socket.c | -rw-r--r-- | 21.8 KB |
| tap-bsd.c | -rw-r--r-- | 6.4 KB |
| tap-linux.c | -rw-r--r-- | 8.3 KB |
| tap-linux.h | -rw-r--r-- | 1.8 KB |
| tap-solaris.c | -rw-r--r-- | 6.7 KB |
| tap-stub.c | -rw-r--r-- | 2.1 KB |
| tap-win32.c | -rw-r--r-- | 23.3 KB |
| tap.c | -rw-r--r-- | 26.8 KB |
| tap_int.h | -rw-r--r-- | 2.0 KB |
| trace-events | -rw-r--r-- | 1.1 KB |
| util.c | -rw-r--r-- | 1.9 KB |
| util.h | -rw-r--r-- | 1.3 KB |
| vde.c | -rw-r--r-- | 3.6 KB |
| vhost-user.c | -rw-r--r-- | 11.4 KB |
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