This series provides the necessary changes to allow "flat" executable binaries meant for no-MMU systems to actually run on systems with a MMU. This can also be found in the following git repo: git://git.linaro.org/people/nicolas.pitre/linux binfmt_flat_with_mmu *Why?* Because developing and testing natively on a large system with lots of RAM makes it so much more convenient to use all the existing profiling tools and debugging facilities that a kernel with lots of RAM can give. And incidentally, those systems with lots of RAM all have a MMU. *Why not use elf_fdpic?* The flat executable format is simple with very small footprint overhead, either in the executables themselves or kernel support. This makes the flat format more suitable than elf_fdpic for very small single-user-app embedded systems. And while elf_fdpic binaries can run on MMU systems, flat binaries still couldn't, which just felt wrong. So here it is. The no-MMU support should remain unaffected, confirmed by Greg Ungerer. Tested on ARM with MMU only with a busybox build. Please consider for merging. Changes since v2: - Added protection against a corrupted header that could have caused nasty overflows etc. Suggested by Alan Cox. - printk() modernization. Suggested by Greg Ungerer / Geert Uytterhoeven. - Added Greg Ungerer's reviewed-by tag. Changes since v1: - Removed SuperH and Xtensa from the Kconfig rule as they fail to build due to lack of get/put_unaligned_user(). - Clarified some commit logs a bit. diffstat: arch/arm/include/asm/flat.h | 5 +- arch/m68k/include/asm/flat.h | 5 +- fs/Kconfig.binfmt | 3 +- fs/binfmt_elf_fdpic.c | 38 +--- fs/binfmt_flat.c | 453 +++++++++++++++++++++---------------- fs/exec.c | 33 +++ include/linux/binfmts.h | 2 + 7 files changed, 306 insertions(+), 233 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
