Hi, I noticed that when we get a SEGV due to jumping to non-readable memory, sometimes si_addr and program counter in siginfo_t are slightly off. I tracked this down to the assumption that translators stop before the end of a page, while in reality they may stop right after it.
Patch 1 fixes the issue, patch 2 adds tests. Best regards, Ilya Ilya Leoshkevich (2): linux-user: Fix siginfo_t contents when jumping to non-readable pages tests/tcg: Test siginfo_t contents when jumping to non-readable pages accel/tcg/translate-all.c | 16 ++-- accel/tcg/translator.c | 25 ++++++ include/hw/core/cpu.h | 2 + linux-user/signal.c | 5 ++ tests/tcg/multiarch/noexec.h | 114 ++++++++++++++++++++++++ tests/tcg/s390x/Makefile.target | 1 + tests/tcg/s390x/noexec.c | 145 +++++++++++++++++++++++++++++++ tests/tcg/x86_64/Makefile.target | 3 +- tests/tcg/x86_64/noexec.c | 116 +++++++++++++++++++++++++ 9 files changed, 421 insertions(+), 6 deletions(-) create mode 100644 tests/tcg/multiarch/noexec.h create mode 100644 tests/tcg/s390x/noexec.c create mode 100644 tests/tcg/x86_64/noexec.c -- 2.35.3
