The test cases have been changed in v3 to fix some issues pointed out in code review. The main change is that the tests no longer naively copy C code around, opting instead to have hard-coded binary payloads. Given the small amount of code I found that the workarounds for position- independence and figuring out the actual code length were at least as ugly, but that's only my preference, please tell me if you'd prefer something different.
---- When running in user-mode QEMU currently fails to emulate JITs that use dual-mapped code to get around W^X restrictions, where one mapping is writable and one is executable. As it has no way of knowing that a write to the writable region is reflected in the executable one, it fails to invalidate previously translated code which leads to a crash at best. (Note that system mode is unaffected as the softmmu is fully aware of what is going on.) This patch series catches changes to dual-mapped code by honoring the cache management instructions required to make things work on actual hardware. See https://gitlab.com/qemu-project/qemu/-/issues/1034 for more background information John Högberg (2): target/arm: Handle IC IVAU to improve compatibility with JITs tests/tcg/aarch64: Add testcases for IC IVAU and dual-mapped code target/arm/helper.c | 47 ++++++++- tests/tcg/aarch64/Makefile.target | 3 +- tests/tcg/aarch64/icivau.c | 169 ++++++++++++++++++++++++++++++ 3 files changed, 215 insertions(+), 4 deletions(-) create mode 100644 tests/tcg/aarch64/icivau.c -- 2.38.5
