This series enables aarch64 with ilp32 mode, and as supporting work, 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 v4.9-rc1. It works with glibc-2.24, and tested with LTP. This version contains ABI changes, and should be used with new glibc version. See links below. This is RFC because there is still no solid understanding what type of registers top-halves delousing we prefer and it affects ABI. In this patchset, w0-w7 are cleared for each syscall in assembler entry. The alternative approach is in introducing compat wrappers which is little faster for natively routed syscalls (~2.6% for syscall with no payload) but much more complicated. Patch 1 may be applied separately from other patches of series. 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: https://lkml.org/lkml/2016/5/23/661 v7: RFC nowrap: https://lkml.org/lkml/2016/6/17/990 v7: RFC2 nowrap: https://lkml.org/lkml/2016/8/17/245 v7: RFC3 nowrap: https://lkml.org/lkml/2016/8/17/245 - rebased on kernel 4.9-rc1; - setrlimit(), getrlimit() special handling is dropped. rlim_t is still 64-bit, but glibc is forced to use sys_prlimit64(), and redirection is not needed anymore; - sys_stat() and sys_stat64() redirection is dropped. Glibc defines aarch32-compatible struct stat instead; - sys_fcntl() redirection is dropped. Glibc sets proper definitions for requests instead; - renameat() is disabled for aarch64/ilp32. Glibc is forced to use renameat2(); - __ARCH_WANT_SYNC_FILE_RANGE2 is enabled for aarch64/ilp32 to force it use sys_sync_file_range2 prior to sys_sync_file_range, like aarch32; - VDSO code refactored. Version is switched to 4.9. - comments and documentation are revised; - checkpatch.pl errors are fixed. Links: Kernel: https://github.com/norov/linux/tree/ilp32-v4.9 glibc: https://github.com/norov/glibc/tree/ilp32-2.24-dev1 Andrew Pinski (6): arm64: rename COMPAT to AARCH32_EL0 in Kconfig arm64: ensure the kernel is compiled for LP64 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 (11): 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: ilp32: share aarch32 syscall handlers arm64: signal: share lp64 signal routines to ilp32 arm64: signal32: move ilp32 and aarch32 common code to separated file arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Documentation/arm64/ilp32.txt | 46 +++++++ arch/Kconfig | 4 + arch/arc/Kconfig | 1 + arch/arm/Kconfig | 1 + arch/arm64/Kconfig | 19 ++- arch/arm64/Makefile | 5 + arch/arm64/include/asm/compat.h | 19 +-- arch/arm64/include/asm/elf.h | 29 +++-- 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 | 90 +++++++++++++ arch/arm64/include/asm/memory.h | 5 +- arch/arm64/include/asm/processor.h | 11 +- arch/arm64/include/asm/ptrace.h | 2 +- arch/arm64/include/asm/seccomp.h | 2 +- arch/arm64/include/asm/signal32.h | 9 +- arch/arm64/include/asm/signal32_common.h | 27 ++++ arch/arm64/include/asm/signal_common.h | 33 +++++ arch/arm64/include/asm/signal_ilp32.h | 38 ++++++ arch/arm64/include/asm/syscall.h | 2 +- arch/arm64/include/asm/thread_info.h | 4 +- arch/arm64/include/asm/unistd.h | 8 +- arch/arm64/include/asm/unistd32.h | 2 +- arch/arm64/include/asm/vdso.h | 6 + arch/arm64/include/uapi/asm/bitsperlong.h | 9 +- arch/arm64/include/uapi/asm/unistd.h | 12 ++ arch/arm64/kernel/Makefile | 18 ++- arch/arm64/kernel/asm-offsets.c | 9 +- arch/arm64/kernel/binfmt_elf32.c | 31 +++++ arch/arm64/kernel/binfmt_ilp32.c | 97 ++++++++++++++ arch/arm64/kernel/cpufeature.c | 8 +- arch/arm64/kernel/cpuinfo.c | 20 +-- arch/arm64/kernel/entry.S | 34 ++++- arch/arm64/kernel/entry32.S | 80 ------------ arch/arm64/kernel/entry32_common.S | 107 ++++++++++++++++ arch/arm64/kernel/entry_ilp32.S | 22 ++++ 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 | 110 ++++++++++++++-- arch/arm64/kernel/signal.c | 102 +++++++++------ arch/arm64/kernel/signal32.c | 107 ---------------- arch/arm64/kernel/signal32_common.c | 135 ++++++++++++++++++++ arch/arm64/kernel/signal_ilp32.c | 174 ++++++++++++++++++++++++++ arch/arm64/kernel/sys32.c | 1 + arch/arm64/kernel/sys_ilp32.c | 100 +++++++++++++++ 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 | 70 +++++++++-- arch/arm64/kernel/vdso/gettimeofday.S | 20 ++- arch/arm64/kernel/vdso/vdso.S | 6 +- 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/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/fcntl.h | 2 +- include/linux/ptrace.h | 6 + include/linux/thread_bits.h | 54 ++++++++ include/linux/thread_info.h | 44 +------ include/uapi/asm-generic/unistd.h | 5 +- kernel/ptrace.c | 10 +- 87 files changed, 1635 insertions(+), 389 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/entry32_common.S 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 create mode 100644 include/linux/thread_bits.h -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
