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It has the most advanced debugging features we have ever seen. To highlight some, its
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It has the most advanced debugging features we have ever seen. To highlight some, its
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memory access tracing ability has been really helpfull to us. During device driver
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memory access tracing ability has been really helpfull to us. During device driver
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development, we appreciated the possibility to turn logging of the devices to a specified
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development, we appreciated the possibility to turn logging of the devices to a specified
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verbosity.
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verbosity.
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We used it to test and develop amd64 and ia32 architectures in SMP mode and mips32 architecture in UP mode.
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We used it to test and develop amd64 and ia32 architectures in SMP mode and mips32 architecture in UP mode. Simics emulates the 4Kc processor on the MIPS architecture.
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Unfortunately, this processor does not have an exception Reserved Instruction, which
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makes it unusable in an environment with programs using thread local storage.
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Regardless of its invaluable qualities, it has still contained bugs. One of the most
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Regardless of its invaluable qualities, it has still contained bugs. One of the most
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serious was bug with ticket \#3351. {\OP} discovered that its BIOS rewrites kernel memory
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serious was bug with ticket \#3351. {\OP} discovered that its BIOS rewrites kernel memory
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during application processors start. Another bugs found were related to amd64 and mips32.
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during application processors start. Another bugs found were related to amd64 and mips32.
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As for amd64, Simics did not report general protection fault when {\tt EFER.NXE} was 0 and a non-executable
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As for amd64, Simics did not report general protection fault when {\tt EFER.NXE} was 0 and a non-executable