Author: kp Date: Fri Oct 2 07:30:11 2020 New Revision: 366355 URL: https://svnweb.freebsd.org/changeset/base/366355
Log: riscv: handle access faults in user mode Access faults in user mode are treated like TLB misses, which leads to an endless loop of faults. It's less serious than the same fault in kernel mode, because we can just terminate the process, but that's not ideal. Treat user mode access faults as a bus error. Suggested by: jrtc27 Reviewed by: br, jhb Sponsored by: Axiado Differential Revision: https://reviews.freebsd.org/D26621 Modified: head/sys/riscv/riscv/trap.c Modified: head/sys/riscv/riscv/trap.c ============================================================================== --- head/sys/riscv/riscv/trap.c Fri Oct 2 05:59:55 2020 (r366354) +++ head/sys/riscv/riscv/trap.c Fri Oct 2 07:30:11 2020 (r366355) @@ -343,6 +343,10 @@ do_trap_user(struct trapframe *frame) case EXCP_FAULT_LOAD: case EXCP_FAULT_STORE: case EXCP_FAULT_FETCH: + call_trapsignal(td, SIGBUS, BUS_ADRERR, (void *)frame->tf_sepc, + exception); + userret(td, frame); + break; case EXCP_STORE_PAGE_FAULT: case EXCP_LOAD_PAGE_FAULT: case EXCP_INST_PAGE_FAULT: _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"