On 2/23/24 01:35, Ilya Leoshkevich wrote:
On Thu, Feb 22, 2024 at 05:03:09PM -1000, Richard Henderson wrote:
Handle combined host and guest alignment requirements.
Handle host and guest page size differences.
Handle SHM_EXEC.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/115
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
linux-user/mmap.c | 146 ++++++++++++++++++++++++++++++++++------------
1 file changed, 110 insertions(+), 36 deletions(-)
[...]
- /* find out the length of the shared memory segment */
+ /*
+ * Because we can't use host shmat() unless the address is sufficiently
+ * aligned for the host, we'll need to check both.
+ * TODO: Could be fixed with softmmu.
+ */
Are there any plans to introduce softmmu to qemu-user?
Long-term ones, yes. There are *so* many places for which emulation doesn't quite work
unless the host and guest page size match. There are projects like asan which don't work
unless the guest has a *very* specific memory layout, which often conflicts with the host.
r~
