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 v4.8-rc2. It works with glibc-2.23, and tested with LTP. This is RFC because there is still no solid understanding what type of registers top-halves delousing we prefer. 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. There's no major changes here comparing to previous submission, mostly the rebase to current master. All changes in details are listed below. No additional regression is observed since previous submission. 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: - rebased on kernel 4.8-rc2; - setrlimit(), getrlimit() are handled by non-compat handlers to follow switching rlim_t to 64-bit in glibc, as pointed by Andreas Shwab; - fixed {GET,SET}SIGMASK handling in ptrace(), as pointed by Zhou Chengming; - removed put_sig{set,get)_t duplication; - patches 1 and 2 from previous submission are joined, missed chunk restored, found by by Andreas Shwab. Links: Kernel: https://github.com/norov/linux/commits/ilp32-4.8 glibc: https://github.com/norov/glibc/commits/ilp32-2.24-dev 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 (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 | 54 ++++++++ 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/signal32.h | 9 +- arch/arm64/include/asm/signal32_common.h | 28 +++++ 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 | 6 +- 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 | 18 ++- arch/arm64/kernel/asm-offsets.c | 9 +- arch/arm64/kernel/binfmt_elf32.c | 31 +++++ arch/arm64/kernel/binfmt_ilp32.c | 96 +++++++++++++++ arch/arm64/kernel/cpufeature.c | 8 +- arch/arm64/kernel/cpuinfo.c | 20 +-- arch/arm64/kernel/entry.S | 34 ++++- arch/arm64/kernel/entry32.S | 65 ---------- arch/arm64/kernel/entry32_common.S | 93 ++++++++++++++ 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 | 110 +++++++++++++++-- arch/arm64/kernel/signal.c | 102 +++++++++------ arch/arm64/kernel/signal32.c | 107 ---------------- arch/arm64/kernel/signal32_common.c | 136 ++++++++++++++++++++ arch/arm64/kernel/signal_ilp32.c | 171 ++++++++++++++++++++++++++ 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 | 79 +++++++++--- arch/arm64/kernel/vdso/gettimeofday.S | 18 ++- 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/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 | 55 +++++++++ include/linux/thread_info.h | 44 +------ include/uapi/asm-generic/unistd.h | 5 +- kernel/ptrace.c | 10 +- 83 files changed, 1597 insertions(+), 374 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-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
