Comment 8 for bug 1705118
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| Peter Maydell (pmaydell) wrote Re: qemu user mode does not support catching SIGSEGV on some architectures | #8 |
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e3ace39
(Get the code!)
This is an interesting collection of different bugs:
* s390x is missing masking operations, as you describe
* ppc is passing the PC of the offending insn, not the data address, into si_addr
* sparc fails to record the address of a data fault and so passes 0 into si_addr
* sparc also isn't implementing rt_sigaction correctly and so the calls in your test program fail EINVAL (your test program doesn't check the return value from sigaction, so it ploughs ahead and makes the faulting data access with the SIG_DFL behaviour for SEGV, hence the uncaught SEGV).
I'm putting together some patches for these.