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context changes and scheduler userspace check fix

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Matheus
2024-05-27 22:00:59 -03:00
parent 24e8f648bb
commit d2527bee92
4 changed files with 57 additions and 15 deletions
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kernel-src/arch/x86-64/context.asm
+2 -1
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@@ -41,6 +41,7 @@ arch_context_switch:
; since this uses the C system V abi, some registers can be clobbered (in this case, r10 and r11)
; rdi has the pointer to the function to call
; rsi has the pointer to the stack the function should have on call. if NULL the stack is not changed
; rdx has the pointer to the arguments to pass to the function
; if the main function returns, do a context switch as the registers could have been changed
global arch_context_saveandcall
arch_context_saveandcall:
@@ -79,9 +80,9 @@ arch_context_saveandcall:
push qword 0 ; GS
sub rsp, 8 ; cr2
mov r11, rdi ; save function to call
mov rdi, rsp ; first argument is the context struct
mov rsi, rdx ; pass argument
call r11 ; jump to the desired function
; do context switch to return