Devel September 2015

devel@sel4.systems

15 participants
16 discussions

Mysterious Label Before sysenter
by Corey Richardson 16 Sep '15

16 Sep '15

For example, here: https://github.com/seL4/seL4/blob/master/libsel4/arch_include/x86/sel4/arch… What use is the label? Does it align the instruction or do other ABI-important things? -- /cmr

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x86-64
by Raymond Jennings 14 Sep '15

14 Sep '15

Does seL4 support x86-64 with 64-bit virtual address spaces?

2 2

Adding a Rust kernel interface generator
by Corey Richardson 11 Sep '15

11 Sep '15

Hello, As part of the robigalia [0] project I must create a Rust interface to the kernel. I'm using the XML from kernel/libsel4 and have been creating a "new" generator by copying the existing Python scripts. Should I send a patch upstream once this is suitably complete, or should I maintain this completely externally? [0] - https://github.com/robigalia -- /cmr

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how to detect the number of CPUs in the system
by 杰尔米 01 Sep '15

01 Sep '15

Hi all, i want to get the number of CPUs in the system and how many cores in one CPU. how to do that? Thanks! Jeremy Li

3 2

The pt/pd/as abstraction vs software TLBs
by Raymond Jennings 01 Sep '15

01 Sep '15

Hey, quick question. This is just hypothetical, but would making management of pagetables/pagedirectories a low level literal operation hurt seL4's portability to other architectures that might not even use page tables? I could be mistaken but I think there's some archs out there that only have software TLBs (openrisc IIRC among them) Please forgive me if I'm mistaken but my recent question about memory abstraction reminded me about this.

3 2

sharing memory between processes
by Raymond Jennings 01 Sep '15

01 Sep '15

Is there an easy way for one task to share address space with another task directly or does it have to go through the kernel/os and be emulated? I noticed that support for mapping memory is mostly low level assignment of physical frames to virtual frames via page tables, unlike Mach which uses memory objects.

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Devel September 2015