Hi,
Qemu's Sparc32 system emulator is getting to the point where the first user space application almost executes. But there is some strangeness with kernel's use of %g6, it's used for example in do_sparc_fault, but nothing is restoring it before that, so there is a kernel zero page access as a result. In Qemu this means that the emulator halts. If I patch the kernel so that %g6 is restored in trap/irq handlers, the execution goes on (for example, page faults bring in user pages) until the next unpatched use of %g6 happens.
How can this possibly work in a real hardware? The same %g6 system is used in 2.4. series, I'm currently using 2.6.11-rc4.
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