Lec06 Isolation & system call entry/exit (Robert) - MIT6.S081

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Lec01 Introduction and Examples (Robert)

Lec03 OS Organization and System Calls (Frans)

Lec04 Page tables (Frans)

Lec05 Calling conventions and stack frames RISC-V (TA)

Lec06 Isolation & system call entry/exit (Robert)

6.2 Trap代码执行流程

6.3 ECALL指令之前的状态

6.4 ECALL指令之后的状态

6.5 uservec函数

6.6 usertrap函数

6.7 usertrapret函数

6.8 userret函数

Lec08 Page faults (Frans)

Lec09 Interrupts (Frans)

Lec10 Multiprocessors and locking (Frans)

Lec11 Thread switching (Robert)

Lec13 Sleep & Wake up (Robert)

Lec14 File systems (Frans)

Lec15 Crash recovery (Frans)

Lec16 File system performance and fast crash recovery (Robert)

Lec17 Virtual memory for applications (Frans)

Lec18 OS organization (Robert)

Lec19 Virtual Machines (Robert)

Lec20 Kernels and HLL (Frans)

Lec21 Networking (Robert)

Lec22 Meltdown (Robert)

Lec23 RCU (Robert)

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Lec06 Isolation & system call entry/exit (Robert)

准备工作：阅读【1】中第4章，除了4.6；阅读RISCV.h【2】；阅读trampoline.S【3】；阅读trap.c【4】
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【1】https://pdos.csail.mit.edu/6.828/2020/xv6/book-riscv-rev1.pdf​
【2】https://github.com/mit-pdos/xv6-riscv/blob/riscv/kernel/riscv.h​
【3】https://github.com/mit-pdos/xv6-riscv/blob/riscv/kernel/trampoline.S​
【4】https://github.com/mit-pdos/xv6-riscv/blob/riscv/kernel/trap.c​

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