|
From: | Jakub Jermar |
Subject: | [Qemu-devel] [PATCH] Bug in AMD64 emulation Was: [AMD64] Possible problem with the DF flag during the SYSCALL instruction |
Date: | Tue, 25 Mar 2008 20:45:37 +0100 |
User-agent: | Thunderbird 2.0.0.12 (X11/20080227) |
Hi,as no one has picked my previous report up yet, I am resending my patch again. The patch fixes a bug in the way QEMU emulates AMD64 instruction called SYSCALL. The problem appears to be stale DF variable.
Jakub
--- helper.c 2008-01-06 20:38:45.000000000 +0100 +++ helper.c.new 2008-03-20 22:39:17.000000000 +0100 @@ -1008,6 +1008,7 @@ DESC_S_MASK | DESC_W_MASK | DESC_A_MASK); env->eflags &= ~env->fmask; + DF = 1 - (2 * ((env->eflags >> 10) & 1)); if (code64) env->eip = env->lstar; else
[Prev in Thread] | Current Thread | [Next in Thread] |