This series enables aarch64 with ilp32 mode, and as supporting work, introduces compat wrappers based on s390 solution, and also introduces ARCH_32BIT_OFF_T configuration option that is enabled for existing 32-bit architectures but disabled for new arches (so 64-bit off_t is is used by new userspace). This version is based on kernel v4.6. It works with glibc-2.23, and tested with LTP. It was tested on QEMU and ThunderX machines. No major differences found. This is not RFC anymore, because ILP32 is now tested in big-endian mode; signals, vDSO and other subsystems are tested, and look working v3: https://lkml.org/lkml/2014/9/3/704 v4: https://lkml.org/lkml/2015/4/13/691 v5: https://lkml.org/lkml/2015/9/29/911 v6: ABI reworked significantly; - syscall input arguments are deloused with compat wrappers; - vDSO is now working for both BE and LE; - signal subsystem is reworked to handle signal context properly; - binfmt_elf is reworked, and now most of places where execution mode should be detected, are handled statically; - many other less-important fixes. ILP32 glibc branch is available here: https://github.com/norov/glibc/tree/ilp32-2.23 It is tested with this series with no major downsides. I will send it to glibc-alpha soon, after final revise. Please review and comment it as well. Andrew Pinski (6): arm64: ensure the kernel is compiled for LP64 arm64: rename COMPAT to AARCH32_EL0 in Kconfig arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext arm64:ilp32: add ARM64_ILP32 to Kconfig Philipp Tomsich (1): arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov (15): all: introduce COMPAT_WRAPPER option and enable it for s390 all: s390: move wrapper infrastructure to generic headers all: s390: move compat_wrappers.c from arch/s390/kernel to kernel/ all: wrap needed syscalls in generic unistd compat ABI: use non-compat openat and open_by_handle_at variants 32-bit ABI: introduce ARCH_32BIT_OFF_T config option arm64: ilp32: add documentation on the ILP32 ABI for ARM64 thread: move thread bits accessors to separated file arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64 arm64: introduce binfmt_elf32.c arm64: ilp32: introduce binfmt_ilp32.c arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 arm64: signal: share lp64 signal routines to ilp32 arm64: signal32: move ilp32 and aarch32 common code to separated file Documentation/arm64/ilp32.txt | 25 +++ arch/Kconfig | 8 + arch/arc/Kconfig | 1 + arch/arm/Kconfig | 1 + arch/arm64/Kconfig | 20 +- arch/arm64/Makefile | 5 + arch/arm64/include/asm/compat.h | 19 +- arch/arm64/include/asm/elf.h | 35 +--- arch/arm64/include/asm/fpsimd.h | 2 +- arch/arm64/include/asm/ftrace.h | 2 +- arch/arm64/include/asm/hwcap.h | 6 +- arch/arm64/include/asm/is_compat.h | 84 ++++++++ arch/arm64/include/asm/memory.h | 3 +- arch/arm64/include/asm/processor.h | 11 +- arch/arm64/include/asm/ptrace.h | 2 +- arch/arm64/include/asm/signal32.h | 6 +- arch/arm64/include/asm/signal32_common.h | 25 +++ arch/arm64/include/asm/signal_common.h | 33 +++ arch/arm64/include/asm/signal_ilp32.h | 34 ++++ arch/arm64/include/asm/syscall.h | 2 +- arch/arm64/include/asm/thread_info.h | 4 +- arch/arm64/include/asm/unistd.h | 11 +- arch/arm64/include/asm/unistd32.h | 2 +- arch/arm64/include/asm/vdso.h | 6 + arch/arm64/include/uapi/asm/bitsperlong.h | 9 +- arch/arm64/kernel/Makefile | 14 +- arch/arm64/kernel/asm-offsets.c | 9 +- arch/arm64/kernel/binfmt_elf32.c | 33 +++ arch/arm64/kernel/binfmt_ilp32.c | 91 +++++++++ arch/arm64/kernel/cpufeature.c | 8 +- arch/arm64/kernel/cpuinfo.c | 4 +- arch/arm64/kernel/entry.S | 16 +- arch/arm64/kernel/entry_ilp32.S | 23 +++ arch/arm64/kernel/head.S | 2 +- arch/arm64/kernel/hw_breakpoint.c | 10 +- arch/arm64/kernel/perf_regs.c | 2 +- arch/arm64/kernel/process.c | 7 +- arch/arm64/kernel/ptrace.c | 67 ++++++- arch/arm64/kernel/signal.c | 100 ++++++---- arch/arm64/kernel/signal32.c | 85 -------- arch/arm64/kernel/signal32_common.c | 115 +++++++++++ arch/arm64/kernel/signal_ilp32.c | 192 ++++++++++++++++++ arch/arm64/kernel/sys32.c | 1 + arch/arm64/kernel/sys_ilp32.c | 86 ++++++++ arch/arm64/kernel/traps.c | 5 +- arch/arm64/kernel/vdso-ilp32/.gitignore | 2 + arch/arm64/kernel/vdso-ilp32/Makefile | 74 +++++++ arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S | 33 +++ arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S | 95 +++++++++ arch/arm64/kernel/vdso.c | 65 ++++-- arch/arm64/kernel/vdso/gettimeofday.S | 20 +- arch/blackfin/Kconfig | 1 + arch/cris/Kconfig | 1 + arch/frv/Kconfig | 1 + arch/h8300/Kconfig | 1 + arch/hexagon/Kconfig | 1 + arch/m32r/Kconfig | 1 + arch/m68k/Kconfig | 1 + arch/metag/Kconfig | 1 + arch/microblaze/Kconfig | 1 + arch/mips/Kconfig | 1 + arch/mn10300/Kconfig | 1 + arch/nios2/Kconfig | 1 + arch/openrisc/Kconfig | 1 + arch/parisc/Kconfig | 1 + arch/powerpc/Kconfig | 1 + arch/s390/Kconfig | 1 + arch/s390/include/asm/compat.h | 17 +- arch/s390/kernel/Makefile | 2 +- arch/s390/kernel/compat_linux.c | 4 + arch/s390/kernel/compat_wrapper.c | 180 ----------------- arch/score/Kconfig | 1 + arch/sh/Kconfig | 1 + arch/sparc/Kconfig | 1 + arch/tile/Kconfig | 1 + arch/tile/kernel/compat.c | 3 + arch/unicore32/Kconfig | 1 + arch/x86/Kconfig | 1 + arch/x86/um/Kconfig | 1 + arch/xtensa/Kconfig | 1 + drivers/clocksource/arm_arch_timer.c | 2 +- include/linux/compat.h | 277 ++++++++++++++++++++++++++ include/linux/fcntl.h | 2 +- include/linux/ptrace.h | 6 + include/linux/syscalls.h | 57 +----- include/linux/syscalls_structs.h | 60 ++++++ include/linux/thread_bits.h | 55 +++++ include/linux/thread_info.h | 44 +--- include/uapi/asm-generic/unistd.h | 231 ++++++++++----------- kernel/Makefile | 1 + kernel/compat_wrapper.c | 175 ++++++++++++++++ kernel/ptrace.c | 10 +- 92 files changed, 2024 insertions(+), 641 deletions(-) create mode 100644 Documentation/arm64/ilp32.txt create mode 100644 arch/arm64/include/asm/is_compat.h create mode 100644 arch/arm64/include/asm/signal32_common.h create mode 100644 arch/arm64/include/asm/signal_common.h create mode 100644 arch/arm64/include/asm/signal_ilp32.h create mode 100644 arch/arm64/kernel/binfmt_elf32.c create mode 100644 arch/arm64/kernel/binfmt_ilp32.c create mode 100644 arch/arm64/kernel/entry_ilp32.S create mode 100644 arch/arm64/kernel/signal32_common.c create mode 100644 arch/arm64/kernel/signal_ilp32.c create mode 100644 arch/arm64/kernel/sys_ilp32.c create mode 100644 arch/arm64/kernel/vdso-ilp32/.gitignore create mode 100644 arch/arm64/kernel/vdso-ilp32/Makefile create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S delete mode 100644 arch/s390/kernel/compat_wrapper.c create mode 100644 include/linux/syscalls_structs.h create mode 100644 include/linux/thread_bits.h create mode 100644 kernel/compat_wrapper.c -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
