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a54c401ae6
While the relocs tool already supports finding the total number of section headers if vmlinux exceeds 64K sections, it fails to read the extended symbol table to get section header indexes for symbols, causing incorrect symbol table indexes to be used when there are > 64K symbols. Parse the ELF file to read the extended symbol table info, and then replace all direct references to st_shndx with calls to sym_index(), which will determine whether the value can be read directly or whether the value should be pulled out of the extended table. This is needed for future FGKASLR support, which uses a separate section per function. Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com> Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Tony Luck <tony.luck@intel.com> Acked-by: H. Peter Anvin (Intel) <hpa@zytor.com> Tested-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20211013175742.1197608-2-keescook@chromium.org |
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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.