Backports to stable

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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Hi,

I'd like to propose backporting GCC7/8 fixes to all stable branches. Below
is a list up to stable-4.6, but some of the patches are already on
select branches (developed during that release cycle, or already
backported). If you want, I can prepare separate lists for each branch,
but in practice `git cherry-pick` do the right thing already.

    e0a97098e2 x86: fix section type mismatch in mm.c
    fa7789ef18 tools/libxc: fix strncpy size
    796dea37fb tools: include sys/sysmacros.h on Linux
    850e89b3ef tools/blktap2: fix possible '\0' truncation
    3a633c2614 tools/blktap2: fix hypothetical buffer overflow
    f49fa658b5 tools:misc:xenlockprof: fix possible format string overflow
    27751d8924 tools/misc: fix hypothetical buffer overflow in xen-lowmemd
    ebdba150bf xenalyze: fix misleading indentation.
    87761277d7 xenalyze: remove cr3_compare_total
    c2a17869d5 libfsimage: replace deprecated readdir_r() with readdir()
    938c8f53b1 tools/xenpmd: fix possible '\0' truncation
    e75c9dc85f xenpmd: make 32 bit gcc 8.1 non-debug build work
    2d78f78a14 tools: fix several "format-truncation" warnings with GCC 7
    b9daff9d81 libxl: replace deprecated readdir_r() with readdir()
    b021beb21a tools: libxl: NULL terminate partially constructed hex string
    7f601f7c34 tools/gdbsx: fix -Wstringop-truncation warning

    # This one doesn't apply cleanly, because acpi stuff moved
    # tools/firmware/hvmloader/acpi -> tools/acpi
    858dbaaeda libacpi: fixes for iasl >= 20180427

    # Not sure if a good idea in a stable branch; if not acceptable, I can extract
    # gcc-7/gcc-8 related commits and add them to tools/firmware/etherboot/patches/
    461b216534 ipxe: update to newer commit

Another thing worth backporting is xs_watch thread stack size fix +
related patches:

    b4f98dc0d8 tools: fix typo in tools/Rules.mk
    448c03b3cb tools/xenstore: try to get minimum thread stack size for watch thread
    c9bd8a7365 tools/xenstore: add libdl dependency to libxenstore
    1a37319492 tools/xenstore: fix linking libxenstore with ldl

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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