[PATCH v6 00/21] linux-user: Fix siginfo_t contents when jumping to non-readable pages

[Richard Henderson]

Hi Ilya,

After adding support for riscv (similar to s390x, in that we can
find the total insn length from the first couple of bits, so, easy),
I find that the test case doesn't work without all of the other
changes for PROT_EXEC, including the translator_ld changes.

Other changes from your v5:
  - mprotect invalidates tbs.  The test case is riscv, with a
    4-byte insn at offset 0xffe, which was chained to from the
    insn at offset 0xffa.  The fact that the 0xffe tb was not
    invalidated meant that we chained to it and re-executed
    without revalidating page protections.

  - rewrote the test framework to be agnostic of page size, which
    reduces some of the repetition.  I ran into trouble with the
    riscv linker, which relaxed the segment such that .align+.org
    wasn't actually honored.  This new form doesn't require the
    test bytes to be aligned in the binary.


r~


Ilya Leoshkevich (4):
  linux-user: Clear translations and tb_jmp_cache on mprotect()
  accel/tcg: Introduce is_same_page()
  target/s390x: Make translator stop before the end of a page
  target/i386: Make translator stop before the end of a page

Richard Henderson (17):
  linux-user/arm: Mark the commpage executable
  linux-user/hppa: Allocate page zero as a commpage
  linux-user/x86_64: Allocate vsyscall page as a commpage
  linux-user: Honor PT_GNU_STACK
  tests/tcg/i386: Move smc_code2 to an executable section
  accel/tcg: Properly implement get_page_addr_code for user-only
  accel/tcg: Unlock mmap_lock after longjmp
  accel/tcg: Make tb_htable_lookup static
  accel/tcg: Move qemu_ram_addr_from_host_nofail to physmem.c
  accel/tcg: Use probe_access_internal for softmmu
    get_page_addr_code_hostp
  accel/tcg: Add nofault parameter to get_page_addr_code_hostp
  accel/tcg: Raise PROT_EXEC exception early
  accel/tcg: Remove translator_ldsw
  accel/tcg: Add pc and host_pc params to gen_intermediate_code
  accel/tcg: Add fast path for translator_ld*
  target/riscv: Add MAX_INSN_LEN and insn_len
  target/riscv: Make translator stop before the end of a page

 include/elf.h                     |   1 +
 include/exec/cpu-common.h         |   1 +
 include/exec/exec-all.h           |  87 ++++++------------
 include/exec/translator.h         |  96 +++++++++++++-------
 linux-user/arm/target_cpu.h       |   4 +-
 linux-user/qemu.h                 |   1 +
 accel/tcg/cpu-exec.c              | 134 ++++++++++++++--------------
 accel/tcg/cputlb.c                |  93 ++++++--------------
 accel/tcg/plugin-gen.c            |   4 +-
 accel/tcg/translate-all.c         |  29 +++---
 accel/tcg/translator.c            | 136 +++++++++++++++++++++-------
 accel/tcg/user-exec.c             |  18 +++-
 linux-user/elfload.c              |  82 +++++++++++++++--
 linux-user/mmap.c                 |   8 ++
 softmmu/physmem.c                 |  12 +++
 target/alpha/translate.c          |   5 +-
 target/arm/translate.c            |   5 +-
 target/avr/translate.c            |   5 +-
 target/cris/translate.c           |   5 +-
 target/hexagon/translate.c        |   6 +-
 target/hppa/translate.c           |   5 +-
 target/i386/tcg/translate.c       |  32 ++++++-
 target/loongarch/translate.c      |   6 +-
 target/m68k/translate.c           |   5 +-
 target/microblaze/translate.c     |   5 +-
 target/mips/tcg/translate.c       |   5 +-
 target/nios2/translate.c          |   5 +-
 target/openrisc/translate.c       |   6 +-
 target/ppc/translate.c            |   5 +-
 target/riscv/translate.c          |  32 +++++--
 target/rx/translate.c             |   5 +-
 target/s390x/tcg/translate.c      |  20 +++--
 target/sh4/translate.c            |   5 +-
 target/sparc/translate.c          |   5 +-
 target/tricore/translate.c        |   6 +-
 target/xtensa/translate.c         |   6 +-
 tests/tcg/i386/test-i386.c        |   2 +-
 tests/tcg/riscv64/noexec.c        |  79 +++++++++++++++++
 tests/tcg/s390x/noexec.c          | 106 ++++++++++++++++++++++
 tests/tcg/x86_64/noexec.c         |  75 ++++++++++++++++
 tests/tcg/multiarch/noexec.c.inc  | 141 ++++++++++++++++++++++++++++++
 tests/tcg/riscv64/Makefile.target |   1 +
 tests/tcg/s390x/Makefile.target   |   1 +
 tests/tcg/x86_64/Makefile.target  |   3 +-
 44 files changed, 951 insertions(+), 342 deletions(-)
 create mode 100644 tests/tcg/riscv64/noexec.c
 create mode 100644 tests/tcg/s390x/noexec.c
 create mode 100644 tests/tcg/x86_64/noexec.c
 create mode 100644 tests/tcg/multiarch/noexec.c.inc

-- 
2.34.1