[PATCH v7 00/60] user-only: Cleanup SIGSEGV and SIGBUS handling

[Richard Henderson]

Changes for v7:
  Drop prctl changes (phil).
  Fix copyright & license for linux-user/host/*/host-signal.h (thuth).

What's left is all of the changes for accel/tcg, the targets,
and the linux-user changes to match.

This does *not* actually enable user-only unaligned access exceptions
for any target, nor include the tcg/host backend changes, because we
need the changes to prctl to avoid regressing targets.

All patches are reviewed, but posting one more time because of
Thomas' comment re unintentional copyright and LGPL->GPL changes.


r~


Richard Henderson (60):
  accel/tcg: Split out adjust_signal_pc
  accel/tcg: Move clear_helper_retaddr to cpu loop
  accel/tcg: Split out handle_sigsegv_accerr_write
  accel/tcg: Fold cpu_exit_tb_from_sighandler into caller
  configure: Merge riscv32 and riscv64 host architectures
  linux-user: Reorg handling for SIGSEGV
  linux-user/host/x86: Populate host_signal.h
  linux-user/host/ppc: Populate host_signal.h
  linux-user/host/alpha: Populate host_signal.h
  linux-user/host/sparc: Populate host_signal.h
  linux-user/host/arm: Populate host_signal.h
  linux-user/host/aarch64: Populate host_signal.h
  linux-user/host/s390: Populate host_signal.h
  linux-user/host/mips: Populate host_signal.h
  linux-user/host/riscv: Populate host_signal.h
  target/arm: Fixup comment re handle_cpu_signal
  linux-user/host/riscv: Improve host_signal_write
  linux-user/signal: Drop HOST_SIGNAL_PLACEHOLDER
  hw/core: Add TCGCPUOps.record_sigsegv
  linux-user: Add cpu_loop_exit_sigsegv
  target/alpha: Implement alpha_cpu_record_sigsegv
  target/arm: Use cpu_loop_exit_sigsegv for mte tag lookup
  target/arm: Implement arm_cpu_record_sigsegv
  target/cris: Make cris_cpu_tlb_fill sysemu only
  target/hexagon: Remove hexagon_cpu_tlb_fill
  target/hppa: Make hppa_cpu_tlb_fill sysemu only
  target/i386: Implement x86_cpu_record_sigsegv
  target/m68k: Make m68k_cpu_tlb_fill sysemu only
  target/microblaze: Make mb_cpu_tlb_fill sysemu only
  target/mips: Make mips_cpu_tlb_fill sysemu only
  target/nios2: Implement nios2_cpu_record_sigsegv
  linux-user/openrisc: Abort for EXCP_RANGE, EXCP_FPE
  target/openrisc: Make openrisc_cpu_tlb_fill sysemu only
  target/ppc: Implement ppc_cpu_record_sigsegv
  target/riscv: Make riscv_cpu_tlb_fill sysemu only
  target/s390x: Use probe_access_flags in s390_probe_access
  target/s390x: Implement s390_cpu_record_sigsegv
  target/sh4: Make sh4_cpu_tlb_fill sysemu only
  target/sparc: Make sparc_cpu_tlb_fill sysemu only
  target/xtensa: Make xtensa_cpu_tlb_fill sysemu only
  accel/tcg: Restrict TCGCPUOps::tlb_fill() to sysemu
  hw/core: Add TCGCPUOps.record_sigbus
  linux-user: Add cpu_loop_exit_sigbus
  target/alpha: Implement alpha_cpu_record_sigbus
  target/arm: Implement arm_cpu_record_sigbus
  linux-user/hppa: Remove EXCP_UNALIGN handling
  target/microblaze: Do not set MO_ALIGN for user-only
  target/ppc: Move SPR_DSISR setting to powerpc_excp
  target/ppc: Set fault address in ppc_cpu_do_unaligned_access
  target/ppc: Restrict ppc_cpu_do_unaligned_access to sysemu
  linux-user/ppc: Remove POWERPC_EXCP_ALIGN handling
  target/s390x: Implement s390x_cpu_record_sigbus
  target/sh4: Set fault address in superh_cpu_do_unaligned_access
  target/sparc: Remove DEBUG_UNALIGNED
  target/sparc: Split out build_sfsr
  target/sparc: Set fault address in sparc_cpu_do_unaligned_access
  accel/tcg: Report unaligned atomics for user-only
  accel/tcg: Report unaligned load/store for user-only
  tcg: Add helper_unaligned_{ld,st} for user-only sigbus
  linux-user: Handle BUS_ADRALN in host_signal_handler

 configure                                     |   8 +-
 meson.build                                   |   4 +-
 include/exec/exec-all.h                       |  55 +-
 include/hw/core/tcg-cpu-ops.h                 |  71 +-
 include/tcg/tcg-ldst.h                        |   5 +
 linux-user/host/aarch64/host-signal.h         |  74 ++
 linux-user/host/alpha/host-signal.h           |  42 +
 linux-user/host/arm/host-signal.h             |  30 +
 linux-user/host/i386/host-signal.h            |  25 +
 linux-user/host/mips/host-signal.h            |  62 ++
 linux-user/host/ppc/host-signal.h             |  25 +
 linux-user/host/ppc64/host-signal.h           |   1 +
 linux-user/host/riscv/host-signal.h           |  58 ++
 linux-user/host/{riscv64 => riscv}/hostdep.h  |   4 +-
 linux-user/host/riscv32/hostdep.h             |  11 -
 linux-user/host/s390/host-signal.h            |  93 ++
 linux-user/host/s390x/host-signal.h           |   1 +
 linux-user/host/sparc/host-signal.h           |  54 ++
 linux-user/host/sparc64/host-signal.h         |   1 +
 linux-user/host/x32/host-signal.h             |   1 +
 linux-user/host/x86_64/host-signal.h          |  24 +
 target/alpha/cpu.h                            |  21 +-
 target/arm/internals.h                        |   8 +
 target/cris/cpu.h                             |   8 +-
 target/hppa/cpu.h                             |   2 +-
 target/i386/tcg/helper-tcg.h                  |   6 +
 target/microblaze/cpu.h                       |   8 +-
 target/mips/tcg/tcg-internal.h                |   7 +-
 target/nios2/cpu.h                            |   6 +
 target/openrisc/cpu.h                         |   7 +-
 target/ppc/cpu.h                              |   3 -
 target/ppc/internal.h                         |  17 +-
 target/s390x/s390x-internal.h                 |   9 +
 target/sh4/cpu.h                              |   6 +-
 target/xtensa/cpu.h                           |   2 +-
 accel/tcg/cpu-exec.c                          |   3 +-
 accel/tcg/user-exec.c                         | 861 ++----------------
 linux-user/aarch64/cpu_loop.c                 |  12 +-
 linux-user/alpha/cpu_loop.c                   |  15 -
 linux-user/arm/cpu_loop.c                     |  30 +-
 linux-user/cris/cpu_loop.c                    |  10 -
 linux-user/hexagon/cpu_loop.c                 |  24 +-
 linux-user/hppa/cpu_loop.c                    |  23 -
 linux-user/m68k/cpu_loop.c                    |  10 -
 linux-user/microblaze/cpu_loop.c              |  10 -
 linux-user/mips/cpu_loop.c                    |  11 -
 linux-user/openrisc/cpu_loop.c                |  25 +-
 linux-user/ppc/cpu_loop.c                     |   8 -
 linux-user/riscv/cpu_loop.c                   |   7 -
 linux-user/s390x/cpu_loop.c                   |  13 +-
 linux-user/sh4/cpu_loop.c                     |   8 -
 linux-user/signal.c                           | 133 ++-
 linux-user/sparc/cpu_loop.c                   |  25 -
 linux-user/xtensa/cpu_loop.c                  |   9 -
 target/alpha/cpu.c                            |   7 +-
 target/alpha/helper.c                         |  39 +-
 target/alpha/mem_helper.c                     |  30 +-
 target/arm/cpu.c                              |   7 +-
 target/arm/cpu_tcg.c                          |   7 +-
 target/arm/mte_helper.c                       |   6 +-
 target/arm/sve_helper.c                       |   2 +-
 target/arm/tlb_helper.c                       |  42 +-
 target/cris/cpu.c                             |   4 +-
 target/cris/helper.c                          |  18 -
 target/hexagon/cpu.c                          |  23 -
 target/hppa/cpu.c                             |   2 +-
 target/hppa/mem_helper.c                      |  15 -
 target/i386/tcg/tcg-cpu.c                     |   3 +-
 target/i386/tcg/user/excp_helper.c            |  23 +-
 target/m68k/cpu.c                             |   2 +-
 target/m68k/helper.c                          |   6 +-
 target/microblaze/cpu.c                       |   2 +-
 target/microblaze/helper.c                    |  13 +-
 target/microblaze/translate.c                 |  16 +
 target/mips/cpu.c                             |   2 +-
 target/mips/tcg/user/tlb_helper.c             |  59 --
 target/nios2/cpu.c                            |   6 +-
 target/nios2/helper.c                         |   7 +-
 target/openrisc/cpu.c                         |   2 +-
 target/openrisc/mmu.c                         |   9 -
 target/ppc/cpu_init.c                         |   6 +-
 target/ppc/excp_helper.c                      |  41 +-
 target/ppc/user_only_helper.c                 |  15 +-
 target/riscv/cpu.c                            |   2 +-
 target/riscv/cpu_helper.c                     |  21 +-
 target/s390x/cpu.c                            |   7 +-
 target/s390x/tcg/excp_helper.c                |  45 +-
 target/s390x/tcg/mem_helper.c                 |  18 +-
 target/sh4/cpu.c                              |   2 +-
 target/sh4/helper.c                           |   9 +-
 target/sh4/op_helper.c                        |   5 +
 target/sparc/cpu.c                            |   2 +-
 target/sparc/ldst_helper.c                    |  22 -
 target/sparc/mmu_helper.c                     | 115 ++-
 target/xtensa/cpu.c                           |   2 +-
 target/xtensa/helper.c                        |  22 +-
 .../{riscv64 => riscv}/safe-syscall.inc.S     |   0
 target/cris/meson.build                       |   7 +-
 target/hppa/meson.build                       |   6 +-
 target/mips/tcg/meson.build                   |   3 -
 target/mips/tcg/user/meson.build              |   3 -
 target/openrisc/meson.build                   |   2 +-
 target/sparc/meson.build                      |   2 +-
 103 files changed, 1269 insertions(+), 1436 deletions(-)
 create mode 100644 linux-user/host/aarch64/host-signal.h
 create mode 100644 linux-user/host/alpha/host-signal.h
 create mode 100644 linux-user/host/arm/host-signal.h
 create mode 100644 linux-user/host/i386/host-signal.h
 create mode 100644 linux-user/host/mips/host-signal.h
 create mode 100644 linux-user/host/ppc/host-signal.h
 create mode 100644 linux-user/host/ppc64/host-signal.h
 create mode 100644 linux-user/host/riscv/host-signal.h
 rename linux-user/host/{riscv64 => riscv}/hostdep.h (94%)
 delete mode 100644 linux-user/host/riscv32/hostdep.h
 create mode 100644 linux-user/host/s390/host-signal.h
 create mode 100644 linux-user/host/s390x/host-signal.h
 create mode 100644 linux-user/host/sparc/host-signal.h
 create mode 100644 linux-user/host/sparc64/host-signal.h
 create mode 100644 linux-user/host/x32/host-signal.h
 create mode 100644 linux-user/host/x86_64/host-signal.h
 delete mode 100644 target/mips/tcg/user/tlb_helper.c
 rename linux-user/host/{riscv64 => riscv}/safe-syscall.inc.S (100%)
 delete mode 100644 target/mips/tcg/user/meson.build

-- 
2.25.1