diff options
| author | Daniele Buono <dbuono@linux.vnet.ibm.com> | 2021-03-03 21:59:38 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-06 11:42:57 +0100 |
| commit | c715343fd96bcf93263fda38d81af815fdb5a7fa (patch) | |
| tree | 819300476e8714851bcc49057708fc17540ba0ef /meson.build | |
| parent | 7520c4f0847093aefa87f23113f28d5d1d574aed (diff) | |
meson: Stop if cfi is enabled with system slirp
For CFI, we need to compile slirp as a static library together with qemu.
This is because we register slirp functions as callbacks for QEMU Timers.
When using a system-wide shared libslirp, the type information for the
callback is missing and the timer call produces a false positive with CFI.
With this patch, meson will stop if CFI is enabled with system-wide slirp.
In 6.1 we will introduce a new interface to slirp where the callback is
passed as an enum rather than a function pointer.
Signed-off-by: Daniele Buono <dbuono@linux.vnet.ibm.com>
Message-Id: <20210304025939.9164-1-dbuono@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'meson.build')
| -rw-r--r-- | meson.build | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/meson.build b/meson.build index 07bc23129a..05fb125dc2 100644 --- a/meson.build +++ b/meson.build @@ -1574,6 +1574,18 @@ if have_system endif endif +# For CFI, we need to compile slirp as a static library together with qemu. +# This is because we register slirp functions as callbacks for QEMU Timers. +# When using a system-wide shared libslirp, the type information for the +# callback is missing and the timer call produces a false positive with CFI. +# +# Now that slirp_opt has been defined, check if the selected slirp is compatible +# with control-flow integrity. +if get_option('cfi') and slirp_opt == 'system' + error('Control-Flow Integrity is not compatible with system-wide slirp.' \ + + ' Please configure with --enable-slirp=git') +endif + fdt = not_found fdt_opt = get_option('fdt') if have_system |