From: Jan Kiszka <jan.kiszka@siemens.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [REGRESSION] mprotect in guest makes qemu-i386 crash
Date: Thu, 03 Jul 2008 17:13:53 +0200 [thread overview]
Message-ID: <486CECB1.8000504@siemens.com> (raw)
Hi,
this fragment from a code self-modification test of mine used to work a
few weeks ago with qemu-i386 userspace emulation. Now it causes a segfault.
#include <sys/mman.h>
main()
{
mprotect((void *)((unsigned long)main & ~0xfff), 0x1000,
PROT_READ|PROT_WRITE|PROT_EXEC);
}
qemu-x86_64 even complains about an "Unsupported syscall: 221", while
the same 64-bit binary works fine with 0.9.1 (I don't recall anymore if
it worked recently with SVN head).
Anyone some idea? Known issue?
Jan
--
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux
next reply other threads:[~2008-07-03 15:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-03 15:13 Jan Kiszka [this message]
2008-07-07 12:40 ` [Qemu-devel] Re: [REGRESSION] mprotect in guest makes qemu-i386 crash Jan Kiszka
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