This version is rebased on kernel v4.6-rc2, and has fixes in signal subsystem. It works with updated glibc [1] (though very draft), and tested with LTP. It was tested on QEMU and ThunderX machines. No major difference found. This is RFC because ILP32 is not tested in big-endian mode. 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: - time_t, __kenel_off_t and other types turned to be 32-bit for compatibility reasons (after v5 discussion); - related changes applied to ILP32 syscall table and handlers; - ILP32 VDSO code excluded. It's not mandatory, and caused questions during review process. We definitely make sure we will follow up with a VDSO later on because it is needed for performance reasons; - fixed build issues with different combinations of AARCH32 / ILP32 enabling in config; - ILP32 TLS bug fixed; - entry32-common.S introduced to hold wrappers needed for both ILP32 and AARCH32_EL0; - documentation updated according to latest changes; - rebased to the current head; - coding style re-checked; - ILP32 syscall table turned around. rfc3: - all structures and system calls are just like AARCH32 ones now. with 2 exceptions: syscalls that take 64-bit parameter in 2 32-bit regosters are replaced with LP64 version; struct rt_sigframe is constructed both from LP64 and AARCH32 fields to be consistent with AARCH64 register set; - documentation rewritten accordingly; - common code for all 3 ABIs is moved to separated files for easy use, new headers and objects are introduced, incl: is_compat.h, thread_bits.h, signal_common.h, signal32_common.h. - ILP32 VDSO code restored, Nathans comments are addressed; - patch "arm64: ilp32: force IPC_64 in msgctl, shmctl, semctl" removed, as Arnd suggested general solution for IPC_64 problem. rfc4: - sys_ilp32.c syscall list is fixed according to comments; - binfmt_elf32.c and binfmt_ilp32.c are introduced to host the code handling corresponding formats; - statfs64, fstsatfs64 and mmap wrappers are removed; - rebased on v4.4-rc8 + http://www.spinics.net/lists/kernel/msg2151759.html rfc5: - addressed rfc4 comments; - turned s390 compat wrappers to be generic and applied it to arm64/ilp32. Heiko Carsten and Martin Schwidefsky added to CC as s390 maintainers. rfc6: - glibc follows new ABI, [1]; - significant rework for signal subsystem (patches 21, 23) - struct ucontext is now corresponds user representation; - compat wrappers and 32-bit off_t patchsets are joined with this patchset, as for now ilp32 is the only user for them; - moved to kernel v4.6-rc2; - few minor bugfixes. [1] https://github.com/norov/glibc/tree/new-api Andrew Pinski (7): arm64: ensure the kernel is compiled for LP64 arm64: rename COMPAT to AARCH32_EL0 in Kconfig arm64: change some CONFIG_COMPAT over to use CONFIG_AARCH32_EL0 instead 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 Bamvor Jian Zhang (1): arm64: compat: change config dependences to aarch32 Philipp Tomsich (1): arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov (16): all: syscall wrappers: add documentation 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/adding-syscalls.txt | 32 +++ Documentation/arm64/ilp32.txt | 13 ++ arch/Kconfig | 8 + arch/arc/Kconfig | 1 + arch/arm/Kconfig | 1 + arch/arm64/Kconfig | 17 +- 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 | 3 +- 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 | 12 +- arch/arm64/kernel/asm-offsets.c | 2 +- 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 | 18 +- 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 | 68 +++++++ arch/arm64/kernel/traps.c | 5 +- arch/arm64/kernel/vdso-ilp32/.gitignore | 2 + arch/arm64/kernel/vdso-ilp32/Makefile | 72 +++++++ 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/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, 1997 insertions(+), 637 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
