On 7/7/21 1:48 AM, Richard Henderson wrote:
> Supercedes: <20210619034329.532318-1-richard.hender...@linaro.org>
> ("[PATCH 00/12] linux-user: Load a vdso for x86_64 and hppa")
>
> Supercedes: <20210618192951.125651-1-richard.hender...@linaro.org>
> ("[PATCH v2 00/23] linux-user: Move signal trampolines to new page")
>
> Changes for v2:
> * Add vdsos for aarch64, arm, i386, riscv.
> * Drop setup_sigtramp for any target with a vdso.
> * Drop arm v1 signal support.
> * Simplify ppc encode_trampoline.
>
> The remaining linux kernel targets that support vdsos are:
>
> MIPS is particularly troublesome because of a multitude of ISAs.
> The kernel doesn't even support them all, disabling the vdso for
> micromips (and probably ignores nanomips entirely). Though I'll
> note that linux-user/mips does not handle any of the modern
> ISAs -- install_sigtramp is strictly MIPS I. In addition there
> are 3 ELF ABIs, so there's some combinatorial explosion in the
> set of vdsos that would need to be pre-built. Perhaps put this
> off until we can build these on demand.
Cc'ing Maciej to keep him aware, but FWIW, this sounds good to me.
> PPC is troublesome because of __kernel_get_syscall_map.
> In addition to needing to collect the set of syscalls that qemu
> supports, we'd need to update the vdso every time we add support
> for a new syscall. And then there are the 3 ELF ABIs. So again
> put this off until we can build these on demand.
>
> S390x shouldn't be troublesome, I just didn't finish them all.
>
>
> r~
>
>
> Richard Henderson (36):
> linux-user: Add infrastructure for a signal trampoline page
> linux-user: Fix style problems in linuxload.c
> linux-user: Introduce imgsrc_read, imgsrc_read_alloc
> linux-user: Tidy loader_exec
> linux-user: Do not clobber bprm_buf swapping ehdr
> linux-user: Use ImageSource in load_elf_image
> linux-user: Use ImageSource in load_symbols
> linux-user: Replace bprm->fd with bprm->src.fd
> linux-user: Introduce imgsrc_mmap
> linux-user: Load vdso image if available
> linux-user: Add gen-vdso tool
> linux-user/aarch64: Add vdso and use it for rt_sigreturn
> linux-user/arm: Drop v1 signal frames
> linux-user/arm: Drop "_v2" from symbols in signal.c
> target/arm: Add isar_feature_aa32_a32
> linux-user/arm: Add vdso and use it for rt_sigreturn
> linux-user/alpha: Implement setup_sigtramp
> linux-user/cris: Implement setup_sigtramp
> linux-user/hexagon: Implement setup_sigtramp
> linux-user/hppa: Add vdso and use it for rt_sigreturn
> linux-user/x86_64: Raise SIGSEGV if SA_RESTORER not set
> linux-user/i386: Add vdso and use it for sigreturn
> linux-user/x86_64: Add vdso
> linux-user/m68k: Implement setup_sigtramp
> linux-user/microblaze: Implement setup_sigtramp
> linux-user/mips: Tidy install_sigtramp
> linux-user/mips: Implement setup_sigtramp
> linux-user/nios2: Document non-use of setup_sigtramp
> linux-user/openrisc: Implement setup_sigtramp
> target/ppc: Simplify encode_trampoline
> linux-user/ppc: Implement setup_sigtramp
> linux-user/riscv: Add vdso and use it for sigreturn
> linux-user/s390x: Implement setup_sigtramp
> linux-user/sh4: Implement setup_sigtramp
> linux-user/sparc: Implement setup_sigtramp
> linux-user/xtensa: Implement setup_sigtramp
>
> linux-user/alpha/target_signal.h | 1 +
> linux-user/cris/target_signal.h | 2 +
> linux-user/hexagon/target_signal.h | 2 +
> linux-user/m68k/target_signal.h | 2 +
> linux-user/microblaze/target_signal.h | 2 +
> linux-user/mips/target_signal.h | 1 +
> linux-user/mips64/target_signal.h | 2 +
> linux-user/nios2/target_signal.h | 3 +
> linux-user/openrisc/target_signal.h | 2 +
> linux-user/ppc/target_signal.h | 2 +
> linux-user/qemu.h | 67 +++-
> linux-user/s390x/target_signal.h | 2 +
> linux-user/sh4/target_signal.h | 2 +
> linux-user/sparc/target_signal.h | 4 +
> linux-user/xtensa/target_signal.h | 2 +
> target/arm/cpu.h | 5 +
> linux-user/aarch64/signal.c | 17 +-
> linux-user/alpha/signal.c | 34 +-
> linux-user/arm/signal.c | 500 ++++++--------------------
> linux-user/cris/signal.c | 29 +-
> linux-user/elfload.c | 367 ++++++++++++-------
> linux-user/flatload.c | 8 +-
> linux-user/gen-vdso.c | 223 ++++++++++++
> linux-user/hexagon/signal.c | 19 +-
> linux-user/hppa/signal.c | 8 +-
> linux-user/i386/signal.c | 50 +--
> linux-user/linuxload.c | 171 ++++++---
> linux-user/m68k/signal.c | 47 ++-
> linux-user/microblaze/signal.c | 24 +-
> linux-user/mips/signal.c | 39 +-
> linux-user/openrisc/signal.c | 24 +-
> linux-user/ppc/signal.c | 40 +--
> linux-user/riscv/signal.c | 10 +-
> linux-user/s390x/signal.c | 24 +-
> linux-user/sh4/signal.c | 40 ++-
> linux-user/signal.c | 3 +
> linux-user/sparc/signal.c | 32 +-
> linux-user/xtensa/signal.c | 50 +--
> target/arm/cpu_tcg.c | 7 +
> linux-user/gen-vdso-elfn.c.inc | 306 ++++++++++++++++
> linux-user/aarch64/Makefile.vdso | 11 +
> linux-user/aarch64/meson.build | 11 +
> linux-user/aarch64/vdso-be.so | Bin 0 -> 6000 bytes
> linux-user/aarch64/vdso-le.so | Bin 0 -> 6000 bytes
> linux-user/aarch64/vdso.S | 77 ++++
> linux-user/aarch64/vdso.ld | 74 ++++
> linux-user/arm/Makefile.vdso | 17 +
> linux-user/arm/meson.build | 18 +
> linux-user/arm/vdso-arm-be.so | Bin 0 -> 5648 bytes
> linux-user/arm/vdso-arm-le.so | Bin 0 -> 5648 bytes
> linux-user/arm/vdso-thm-be.so | Bin 0 -> 5620 bytes
> linux-user/arm/vdso-thm-le.so | Bin 0 -> 5620 bytes
> linux-user/arm/vdso.S | 209 +++++++++++
> linux-user/arm/vdso.ld | 74 ++++
> linux-user/hppa/Makefile.vdso | 6 +
> linux-user/hppa/meson.build | 6 +
> linux-user/hppa/vdso.S | 149 ++++++++
> linux-user/hppa/vdso.ld | 75 ++++
> linux-user/hppa/vdso.so | Bin 0 -> 5196 bytes
> linux-user/i386/Makefile.vdso | 5 +
> linux-user/i386/meson.build | 7 +
> linux-user/i386/vdso.S | 149 ++++++++
> linux-user/i386/vdso.ld | 76 ++++
> linux-user/i386/vdso.so | Bin 0 -> 5528 bytes
> linux-user/meson.build | 8 +-
> linux-user/riscv/Makefile.vdso | 11 +
> linux-user/riscv/meson.build | 9 +
> linux-user/riscv/vdso-32.so | Bin 0 -> 5624 bytes
> linux-user/riscv/vdso-64.so | Bin 0 -> 6120 bytes
> linux-user/riscv/vdso.S | 207 +++++++++++
> linux-user/riscv/vdso.ld | 76 ++++
> linux-user/x86_64/Makefile.vdso | 5 +
> linux-user/x86_64/meson.build | 6 +
> linux-user/x86_64/vdso.S | 122 +++++++
> linux-user/x86_64/vdso.ld | 74 ++++
> linux-user/x86_64/vdso.so | Bin 0 -> 6008 bytes
> 76 files changed, 2866 insertions(+), 789 deletions(-)
> create mode 100644 linux-user/gen-vdso.c
> create mode 100644 linux-user/gen-vdso-elfn.c.inc
> create mode 100644 linux-user/aarch64/Makefile.vdso
> create mode 100644 linux-user/aarch64/meson.build
> create mode 100755 linux-user/aarch64/vdso-be.so
> create mode 100755 linux-user/aarch64/vdso-le.so
> create mode 100644 linux-user/aarch64/vdso.S
> create mode 100644 linux-user/aarch64/vdso.ld
> create mode 100644 linux-user/arm/Makefile.vdso
> create mode 100755 linux-user/arm/vdso-arm-be.so
> create mode 100755 linux-user/arm/vdso-arm-le.so
> create mode 100755 linux-user/arm/vdso-thm-be.so
> create mode 100755 linux-user/arm/vdso-thm-le.so
> create mode 100644 linux-user/arm/vdso.S
> create mode 100644 linux-user/arm/vdso.ld
> create mode 100644 linux-user/hppa/Makefile.vdso
> create mode 100644 linux-user/hppa/vdso.S
> create mode 100644 linux-user/hppa/vdso.ld
> create mode 100755 linux-user/hppa/vdso.so
> create mode 100644 linux-user/i386/Makefile.vdso
> create mode 100644 linux-user/i386/vdso.S
> create mode 100644 linux-user/i386/vdso.ld
> create mode 100755 linux-user/i386/vdso.so
> create mode 100644 linux-user/riscv/Makefile.vdso
> create mode 100644 linux-user/riscv/meson.build
> create mode 100755 linux-user/riscv/vdso-32.so
> create mode 100755 linux-user/riscv/vdso-64.so
> create mode 100644 linux-user/riscv/vdso.S
> create mode 100644 linux-user/riscv/vdso.ld
> create mode 100644 linux-user/x86_64/Makefile.vdso
> create mode 100644 linux-user/x86_64/vdso.S
> create mode 100644 linux-user/x86_64/vdso.ld
> create mode 100755 linux-user/x86_64/vdso.so
>
