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d955189ae4
This adds code to the load and store emulation code to byte-swap the data appropriately when the process being emulated is set to the opposite endianness to that of the kernel. This also enables the emulation for the multiple-register loads and stores (lmw, stmw, lswi, stswi, lswx, stswx) to work for little-endian. In little-endian mode, the partial word at the end of a transfer for lsw*/stsw* (when the byte count is not a multiple of 4) is loaded/stored at the least-significant end of the register. Additionally, this fixes a bug in the previous code in that it could call read_mem/write_mem with a byte count that was not 1, 2, 4 or 8. Note that this only works correctly on processors with "true" little-endian mode, such as IBM POWER processors from POWER6 on, not the so-called "PowerPC" little-endian mode that uses address swizzling as implemented on the old 32-bit 603, 604, 740/750, 74xx CPUs. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.