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Clean up process loader

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- cpu_state was being passed 'by value' to modify outer stack frame
- don't pass loader args as rax, rbx, etc - pass in ABI order
This commit is contained in:
Justin C. Miller
2019-03-15 01:05:45 -07:00
parent bf8286d15f
commit 33374ab257
2 changed files with 13 additions and 14 deletions
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11
src/kernel/loader.s
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@@ -4,18 +4,15 @@ extern load_process
global ramdisk_process_loader
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:
; rax - the address of the program image
; rbx - the size of the program image
; rcx - the address of this process' process structure
mov rdi, rax
mov rsi, rbx
mov rdx, rcx
; 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
call load_process
swapgs