Now that we have the len path expressions we can fix the TODO
in btf descriptions to properly specify offsets of btf sections.
Also add proper descriptions for btf type section
and few other minor things around.
This change adds compiler support for complex path
expressions in len targets. E.g. it allows to refer
to a sibling field as len[parent_struct:field:another_field].
See the docs change for details.
This is just a compiler change.
The feature is not yet supported by the prog package.
This prepared for handling of bytesize[parent:foo:bar] expressions
by allowing multiple identifiers after colon.
No functional changes for now, just preparation for storing more
than one identifier after colon.
This is especially problematic for file descriptors referring to tty/pty
devices since it can cause the SSH connection to the VM to die.
The ambition here is reduce the number of "lost connection/no output" failures
at the cost of limiting the coverage of chflags(2).
This is done via a custom Kconfiglib based script, that allows to merge
in all USB configs from a provided one into the current. The script finds
and enabled all USB configs and their dependencies.
make extract recently broke for powerpc on linux-next with:
include/uapi/linux/byteorder/big_endian.h:6:2: error: #error "Unsupported endianness, check your toolchain"
#error "Unsupported endianness, check your toolchain"
Turns out we always built ppc64le headers as big-endian.
First, kernel was configured as BE.
Then, we used gcc to build an executable program for host
and on x86 gcc does not define __LITTLE_ENDIAN__ so kernel
thought that the toolchain is BE too.
Configure kernel as LE and define __LITTLE_ENDIAN__.
This actually changes values of some consts,
but fortunately just few of them.
Due to missing padding arguments, stack garbage could end up being used as
actual arguments. More reading for the curious[1].
While here, add missing descriptions for pread and pwrite.
[1] https://flak.tedunangst.com/post/syzkaller-found-a-bug
* vm: add bhyve support
bhyve is FreeBSD's native hypervisor. Because it is missing snapshot
support and user networking, some additional configuration on the host
is required. However, unlike QEMU on FreeBSD, bhyve can make use of
hardware virtualization features and is thus faster.
* docs/freebsd: document bhyve support
For some bug types kernel produces traceback of all CPUs
(which is presumably useful for these crashes).
However, we currently throw it away because it has context
different from the oops context.
Detect such traceback and preserve output.
The previous default must have changed resulting in apparent failure
to install siteXX.tgz. The observable symptom was:
`Package installation failed. Inspect install_log.`
On powerpc, the "stat" syscall is implemented by "sys_newstat" entry point.
This causes a test failure as we can't find "sys_stat" in kallsyms.
Add "stat" -> "newstat" to the kallsyms rename map to work around this.
Closes: #1083 ("pkg/host: TestSupportedSyscalls fails on ppc64le")
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
After commit 9ad9ef29caa52714dd5faff167e4b61643e40a7e
we started saying "your command '3' is accepted"
because we use numbers now. Keep string representation
of the command when parsing and use it in reply emails.
