id = 1770
title = "Wrong unpacked structure for epoll_event on qemu-or1k (openrisc)"
state = "closed"
created_at = "2023-07-18T12:58:18.844Z"
closed_at = "2023-08-03T06:40:23.368Z"
labels = ["linux-user", "workflow::Patch available"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1770"
host-os = "Slackware GNU/Linux"
host-arch = "x86_64"
qemu-version = "8.0.50 (git commit hash 4633c1e2c576fbabfe5c8c93f4b842504b69c096)"
guest-os = "GNU/Linux OpenRISC user-space"
guest-arch = "or1k (OpenRISC)"
description = """When using cmake automoc, the process will infinite loop waiting for epoll_events."""
reproduce = """1. Try to compile cmake with qt5 support
2. The build process will freeze when "Automatic MOC" is invoked"""
additional = """The problem is that or1k has a "packed" epoll_event structure, so it should be also packed in target_epoll_event structure.
Following the (very trivial) patch:
```
--- qemu-20230327/linux-user/syscall_defs.h.orig\t2023-03-27 15:41:42.000000000 +0200
+++ qemu-20230327/linux-user/syscall_defs.h\t2023-06-30 17:29:39.034322213 +0200
@@ -2714,7 +2709,7 @@ 
 #define FUTEX_CMD_MASK          ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
 
 #ifdef CONFIG_EPOLL
-#if defined(TARGET_X86_64)
+#if defined(TARGET_X86_64) || defined(TARGET_OPENRISC)
 #define TARGET_EPOLL_PACKED QEMU_PACKED
 #else
 #define TARGET_EPOLL_PACKED
```"""