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Simplify task switches

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No longer using the rsp from the entry to the kernel, but instead
switching rsp at task-switching time in assembly.

This currently breaks fork()
This commit is contained in:
Justin C. Miller
2019-03-31 22:49:24 -07:00
parent 5cdbedd4d1
commit ca2362f858
21 changed files with 311 additions and 178 deletions
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11
src/kernel/loader.s
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@@ -7,12 +7,11 @@ ramdisk_process_loader:
; create_process already pushed a cpu_state onto the stack for us, this
; acts both as the cpu_state parameter to load_process, and the saved
; state for the following iretq
;
; Additional parameters:
; rdi - the address of the program image
; rsi - the size of the program image
; rdx - the address of this process' process structure
; rcx - the stack pointer, which points at the cpu_state
pop rdi ; the address of the program image
pop rsi ; the size of the program image
pop rdx ; the address of this process' process structure
pop rcx ; the cpu_state
call load_process
swapgs