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ac7b34218a
now that toolchains long support PT_GNU_STACK marking and there's no need anymore to force modern programs into having all its user mappings executable instead of only the stack and the PROT_EXEC ones. Disable that automatic READ_IMPLIES_EXEC forcing on x86-64 and arm64. Add tables documenting how READ_IMPLIES_EXEC is handled on x86-64, arm and arm64. By Kees Cook. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAl7YFDIACgkQEsHwGGHe VUpnzxAAmXdODNOb1gGQvt+KJthkfkWh2A2R+tWxCRmFtjFTcS/eRxFfvGu2KmFY 2b2AcJzuJeGjs7WIvQU0pkR2p6STyzuSBBLj5J/OJR9FonQ4pPah38df4A0fOgI6 GJyJV9Ie7O2Ph1w2iLOeWBdmR90CnYuabxsfipgOL+sjHlEI0RqLSDgARRQsxTEj KM+JVAFD472KcUJnQKBVBOD1I1DOVBGu12r3y6chgsOtwshLNW/cO15cDgYrgnJZ OlR3EIUukCEEc1KQzUCihsypLuGfrmdq1MyPN8CME8gLfmOBsJyGRDhvmdbS+Wxh kAMYQ9BuNP/jMVtN950qV0qUtnZCeIPlj1sDb9STWz5fInLsXDSCS0eYi32yBFi+ 7yviVU95ml6Mda1Qd5axItTHFAjKIn0qfMZszkLOtUszIzNinCgH7t3ThoXeV223 BqrpntRwiGZVpXDdcp0QFYBsWSMchR47yuhL8pB4SWxQzgNzXqAEg2KFQU0XMDKp pdia9IzUozg/BrjG5cnRfZhq2lBra7fy3Dn6fw5+NR5vqhka0Wr8L6dyM1Rj74EU HPk5bRXgt0OIiIFPi4139ApY7k+8j2nbf12qUchue1ZVVKzbvK996FDXbrGgW3zD Wis1wglxB9urSUTmC1bMOeyOd+gebo3i/ACAjgSo+EbDN7qW0Qw= =2L7y -----END PGP SIGNATURE----- Merge tag 'core_core_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull READ_IMPLIES_EXEC changes from Borislav Petkov: "Split the old READ_IMPLIES_EXEC workaround from executable PT_GNU_STACK now that toolchains long support PT_GNU_STACK marking and there's no need anymore to force modern programs into having all its user mappings executable instead of only the stack and the PROT_EXEC ones. Disable that automatic READ_IMPLIES_EXEC forcing on x86-64 and arm64. Add tables documenting how READ_IMPLIES_EXEC is handled on x86-64, arm and arm64. By Kees Cook" * tag 'core_core_updates_for_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: arm64/elf: Disable automatic READ_IMPLIES_EXEC for 64-bit address spaces arm32/64/elf: Split READ_IMPLIES_EXEC from executable PT_GNU_STACK arm32/64/elf: Add tables to document READ_IMPLIES_EXEC x86/elf: Disable automatic READ_IMPLIES_EXEC on 64-bit x86/elf: Split READ_IMPLIES_EXEC from executable PT_GNU_STACK x86/elf: Add table to document READ_IMPLIES_EXEC |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.