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| author | Aleksa Vuckovic <aleksa@vuckovic.cc> | 2023-02-25 05:43:37 +0100 |
|---|---|---|
| committer | Aleksa Vuckovic <aleksa@vuckovic.cc> | 2023-02-25 05:47:59 +0100 |
| commit | aaa23fffd02fb49cdbc56a480dbb5a8fa95bff38 (patch) | |
| tree | cefd59478bb62a2edca523adc9f10cec605f57b0 /kernel/src/scheduler/switch.S | |
| parent | 4931f266a72dccfb439badfa1070563003c80ce3 (diff) | |
x86_64_regs.S: (push/pop)_(callee/caller)_regs
Diffstat (limited to 'kernel/src/scheduler/switch.S')
| -rw-r--r-- | kernel/src/scheduler/switch.S | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/src/scheduler/switch.S b/kernel/src/scheduler/switch.S new file mode 100644 index 0000000..f4d0e79 --- /dev/null +++ b/kernel/src/scheduler/switch.S @@ -0,0 +1,18 @@ +#include "x86_64_regs.S" + +.global context_switch +context_switch: + /* switch rsp to old task's %rsp */ + + /* save all old task's registers */ + push_caller_saved + push_callee_saved + + /* save old task's rsp & rip */ + call schedule + /* get new task's rsp & rip */ + + /* restore all new task's registers */ + pop_callee_saved + pop_caller_saved + iretq |