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a5ba67b42f
Omit RIP from the emulator's _regs array, which is used only for GPRs, i.e. registers that can be referenced via ModRM and/or SIB bytes. The emulator uses the dedicated _eip field for RIP, and manually reads from _eip to handle RIP-relative addressing. To avoid an even bigger, slightly more dangerous change, hardcode the number of GPRs to 16 for the time being even though 32-bit KVM's emulator technically should only have 8 GPRs. Add a TODO to address that in a future commit. See also the comments above the read_gpr() and write_gpr() declarations, and obviously the handling in writeback_registers(). No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Message-Id: <20220526210817.3428868-4-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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.