[PATCH v8 00/20] ILP32 for ARM64

Yury Norov
2017-06-19T15:49:43Z

This series enables aarch64 with ilp32 mode.

As supporting work, it 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 userspace type is used by new userspace).
Also it deprecates getrlimit and setrlimit syscalls prior to prlimit64.

This version is based on linux-next from 2017-06-16. It works with
glibc-2.25, and tested with LTP, glibc testsuite, trinity, lmbench,
CPUSpec.

Patches 1, 2, 3 and 8 are general, and may be applied separately.

Kernel, GLIBC and OpenSUSE-based distro:
https://github.com/norov/linux/tree/ilp32-20170616.0
https://github.com/norov/glibc/tree/dev9
https://build.opensuse.org/project/show/devel:ARM:Factory:Contrib:ILP32

(GLIBC patches are managed by Steve Ellcey, so my tree is only for
reference.)

Changes:
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: https://lkml.org/lkml/2017/1/9/213
v8: - off_t referred in patches 2 and 13 stands for userspace type which is
underlined in corresponding patch comments and ARCH_32BIT_OFF_T config
option description;
- __IGNORE_getrlimit and __IGNORE_setrlimit are added to
scripts/checksyscalls.sh (patch 3);
- for CONFIG_COMPAT, bool changed to def_bool y and 'select COMPAT' is
dropped for AARCH32_EL0 and ARM64_ILP32 optiond (patches 5 and 20);
- x19 register is used to load TSK_TI_FLAGS in svc path in
arch/arm64/kernel/entry.S to avoid register clobbering (patch 14).
- ilp32 vdso-related files are syncronized wirh lp64 ones, mostly Makefiles
(patch 19);
- in arch/arm64/mm/mmap.c, arch_mmap_rnd() swithed to use is_compat_task()
(patch 9);
- rebased on next-20170616.

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 (13):
compat ABI: use non-compat openat and open_by_handle_at variants
32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option
asm-generic: Drop getrlimit and setrlimit syscalls from default list
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 | 45 +++++++
arch/Kconfig | 15 +++
arch/arc/Kconfig | 1 +
arch/arc/include/uapi/asm/unistd.h | 1 +
arch/arm/Kconfig | 1 +
arch/arm64/Kconfig | 17 ++-
arch/arm64/Makefile | 8 ++
arch/arm64/include/asm/compat.h | 19 +--
arch/arm64/include/asm/elf.h | 40 ++----
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 | 6 +-
arch/arm64/include/asm/vdso.h | 6 +
arch/arm64/include/uapi/asm/bitsperlong.h | 9 +-
arch/arm64/include/uapi/asm/unistd.h | 13 ++
arch/arm64/kernel/Makefile | 8 +-
arch/arm64/kernel/asm-offsets.c | 9 +-
arch/arm64/kernel/binfmt_elf32.c | 37 ++++++
arch/arm64/kernel/binfmt_ilp32.c | 85 +++++++++++++
arch/arm64/kernel/cpufeature.c | 8 +-
arch/arm64/kernel/cpuinfo.c | 8 +-
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 | 8 +-
arch/arm64/kernel/perf_regs.c | 2 +-
arch/arm64/kernel/process.c | 7 +-
arch/arm64/kernel/ptrace.c | 80 ++++++++++--
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 | 170 ++++++++++++++++++++++++++
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 | 80 ++++++++++++
arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S | 33 +++++
arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S | 95 ++++++++++++++
arch/arm64/kernel/vdso.c | 63 ++++++++--
arch/arm64/kernel/vdso/gettimeofday.S | 20 ++-
arch/arm64/kernel/vdso/vdso.S | 6 +-
arch/arm64/mm/mmap.c | 2 +-
arch/blackfin/Kconfig | 1 +
arch/c6x/include/uapi/asm/unistd.h | 1 +
arch/cris/Kconfig | 1 +
arch/frv/Kconfig | 1 +
arch/h8300/Kconfig | 1 +
arch/h8300/include/uapi/asm/unistd.h | 1 +
arch/hexagon/Kconfig | 1 +
arch/hexagon/include/uapi/asm/unistd.h | 1 +
arch/m32r/Kconfig | 1 +
arch/m68k/Kconfig | 1 +
arch/metag/Kconfig | 1 +
arch/metag/include/uapi/asm/unistd.h | 1 +
arch/microblaze/Kconfig | 1 +
arch/mips/Kconfig | 1 +
arch/mn10300/Kconfig | 1 +
arch/nios2/Kconfig | 1 +
arch/nios2/include/uapi/asm/unistd.h | 1 +
arch/openrisc/Kconfig | 1 +
arch/openrisc/include/uapi/asm/unistd.h | 1 +
arch/parisc/Kconfig | 1 +
arch/powerpc/Kconfig | 1 +
arch/score/Kconfig | 1 +
arch/score/include/uapi/asm/unistd.h | 1 +
arch/sh/Kconfig | 1 +
arch/sparc/Kconfig | 1 +
arch/tile/Kconfig | 1 +
arch/tile/include/uapi/asm/unistd.h | 1 +
arch/tile/kernel/compat.c | 3 +
arch/unicore32/Kconfig | 1 +
arch/unicore32/include/uapi/asm/unistd.h | 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/thread_bits.h | 63 ++++++++++
include/linux/thread_info.h | 65 ++--------
include/uapi/asm-generic/unistd.h | 10 +-
scripts/checksyscalls.sh | 5 +
95 files changed, 1606 insertions(+), 407 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

--
2.11.0