On Tue, Dec 29, 2009 at 04:09:17PM +0100, Stefan Weil wrote: > Test environment: > > * ppc-softmmu/qemu-system-ppc running on x86_64 host > * emulated ppc is running debian lenny > > > > While debugging on the emulated ppc (each time when > a shared library is loaded after "r" command?), > qemu-system-ppc prints this error message: > > invalid/unsupported opcode: 00 - 00 - 00 (00000000) 4800fa44 1 > > > > If logging is enabled, the error message goes to qemu.log: > > IN: > 0xc0013488: nop > 0xc001348c: rlwinm r3,r3,0,0,19 > 0xc0013490: li r4,128 > 0xc0013494: mtctr r4 > 0xc0013498: mr r6,r3 > 0xc001349c: dcbst r0,r3 > > invalid/unsupported opcode: 00 - 00 - 00 (00000000) 4800fa44 1 > IN: > 0x4800fa40: twge r2,r2 > 0x4800fa44: .long 0x0 >
The problem is that QEMU doesn't stop the decoding of instructions when it encounters a trap instruction. We should probably either end the TB in that case, or avoid printing "invalid/unsupported opcode", as this instruction will actually never been executed. -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net
