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[0/3] linux-user: Allow gdbstub to ignore page protection

Message ID 20240108233821.201325-1-iii@linux.ibm.com (mailing list archive)
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Series linux-user: Allow gdbstub to ignore page protection | expand

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Ilya Leoshkevich Jan. 8, 2024, 11:34 p.m. UTC 
RFC: https://lists.gnu.org/archive/html/qemu-devel/2023-12/msg02044.html
RFC -> v1: Use /proc/self/mem and accept that this will not work
           without /proc.
           Factor out a couple functions for gdbstub testing.
           Add a test.

Hi,

I've noticed that gdbstub behaves differently from gdbserver in that it
doesn't allow reading non-readable pages. This series improves the
situation by using the same mechanism as gdbserver: /proc/self/mem. If
/proc is not mounted, we fall back to the today's implementation.

Best regards,
Ilya

Ilya Leoshkevich (3):
  linux-user: Allow gdbstub to ignore page protection
  tests/tcg: Factor out gdbstub test functions
  tests/tcg: Add the PROT_NONE gdbstub test

 cpu-target.c                                  | 55 +++++++++++++-----
 tests/guest-debug/run-test.py                 |  7 ++-
 tests/guest-debug/test_gdbstub.py             | 56 +++++++++++++++++++
 tests/tcg/aarch64/gdbstub/test-sve-ioctl.py   | 34 +----------
 tests/tcg/aarch64/gdbstub/test-sve.py         | 33 +----------
 tests/tcg/multiarch/Makefile.target           |  9 ++-
 tests/tcg/multiarch/gdbstub/interrupt.py      | 47 ++--------------
 tests/tcg/multiarch/gdbstub/memory.py         | 41 +-------------
 tests/tcg/multiarch/gdbstub/prot-none.py      | 22 ++++++++
 tests/tcg/multiarch/gdbstub/registers.py      | 41 ++------------
 tests/tcg/multiarch/gdbstub/sha1.py           | 40 ++-----------
 .../multiarch/gdbstub/test-proc-mappings.py   | 39 +------------
 .../multiarch/gdbstub/test-qxfer-auxv-read.py | 37 +-----------
 .../gdbstub/test-thread-breakpoint.py         | 37 +-----------
 tests/tcg/multiarch/prot-none.c               | 38 +++++++++++++
 tests/tcg/s390x/gdbstub/test-signals-s390x.py | 42 +-------------
 tests/tcg/s390x/gdbstub/test-svc.py           | 39 +------------
 17 files changed, 204 insertions(+), 413 deletions(-)
 create mode 100644 tests/guest-debug/test_gdbstub.py
 create mode 100644 tests/tcg/multiarch/gdbstub/prot-none.py
 create mode 100644 tests/tcg/multiarch/prot-none.c