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[Qemu-devel] [PULL 06/24] configure: Don't allow user-only targets for u
From: |
riku . voipio |
Subject: |
[Qemu-devel] [PULL 06/24] configure: Don't allow user-only targets for unknown CPU architectures |
Date: |
Fri, 24 Jun 2016 12:53:01 +0300 |
From: Peter Maydell <address@hidden>
For the user-only targets, we need to know something about the host CPU
architecture even if we are using the TCI interpreter rather than TCG.
(In particular user-exec.c has code for handling signals that needs
to know about that host's context structures.)
Specifically forbid building the user-only targets on unknown CPU
architectures, rather than allowing them to configure but then fail
when building user-exec.c.
This change drops supports for two configurations which were theoretically
possible before:
* linux-user targets on M68K hosts using TCI
* linux-user targets on HPPA hosts using TCI
We don't think anybody is actually trying to use these in practice, though:
* interpreted TCG on a slow host CPU would be unusably slow
* the m68k user-exec.c support is missing is_write detection so guest
code which writes to the same page it is executing from was broken
(will include any guest program using signals)
* HPPA TCG backend support was dropped two and a half years ago
with no complaints
Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Laurent Vivier <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Riku Voipio <address@hidden>
---
configure | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/configure b/configure
index 6696316..dce20f0 100755
--- a/configure
+++ b/configure
@@ -1216,6 +1216,13 @@ esac
QEMU_CFLAGS="$CPU_CFLAGS $QEMU_CFLAGS"
EXTRA_CFLAGS="$CPU_CFLAGS $EXTRA_CFLAGS"
+# For user-mode emulation the host arch has to be one we explicitly
+# support, even if we're using TCI.
+if [ "$ARCH" = "unknown" ]; then
+ bsd_user="no"
+ linux_user="no"
+fi
+
default_target_list=""
mak_wilds=""
--
2.1.4
- [Qemu-devel] [PULL 00/24] linux-user changes, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 04/24] linux-user: Don't use sigfillset() on uc->uc_sigmask, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 05/24] configure: Don't override ARCH=unknown if enabling TCI, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 02/24] linux-user: Use __get_user() and __put_user() to handle structs in do_fcntl(), riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 01/24] linux-user: Avoid possible misalignment in host_to_target_siginfo(), riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 06/24] configure: Don't allow user-only targets for unknown CPU architectures,
riku . voipio <=
- [Qemu-devel] [PULL 03/24] linux-user: Use safe_syscall wrapper for fcntl, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 08/24] user-exec: Remove unused code for OSX hosts, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 07/24] user-exec: Delete now-unused hppa and m68k cpu_signal_handler() code, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 09/24] linux-user: Create a hostdep.h for each host architecture, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 11/24] linux-user: Support F_GETPIPE_SZ and F_SETPIPE_SZ fcntls, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 10/24] linux-user: Fix wrong type used for argument to rt_sigqueueinfo, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 13/24] linux-user: add socket() strace, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 14/24] linux-user: fix clone() strace, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 15/24] linux-user: update get_thread_area/set_thread_area strace, riku . voipio, 2016/06/24
- [Qemu-devel] [PULL 19/24] linux-user: fix x86_64 safe_syscall, riku . voipio, 2016/06/24