686b990a85
There were two issues with signal handling: - With a kernel stack the "info" parameter was passed from kernel memory. This is fixed by making a stack frame to the user stack and copying it there. - If the signal handler uses a system call, the kernel stack was completely and unconditionally destroyed, resulting in a crash in the user application There is also no need to check ustkptr, it is always NULL. Why ? Because signal delivery is deferred when a system call is being executed. |
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