[Qemu-devel] [REGRESSION] mprotect in guest makes qemu-i386 crash

[Jan Kiszka <jan.kiszka@siemens.com>]

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

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