diff options
Diffstat (limited to 'coroutine/win32/Context.asm')
| -rw-r--r-- | coroutine/win32/Context.asm | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/coroutine/win32/Context.asm b/coroutine/win32/Context.asm index 8fa13831bc..f8f431239b 100644 --- a/coroutine/win32/Context.asm +++ b/coroutine/win32/Context.asm @@ -2,40 +2,53 @@ ;; This file is part of the "Coroutine" project and released under the MIT License. ;; ;; Created by Samuel Williams on 10/5/2018. -;; Copyright, 2018, by Samuel Williams. All rights reserved. +;; Copyright, 2018, by Samuel Williams. ;; +.386 .model flat .code +assume fs:nothing + ; Using fastcall is a big win (and it's the same has how x64 works). ; In coroutine transfer, the arguments are passed in ecx and edx. We don't need ; to touch these in order to pass them to the destination coroutine. @coroutine_transfer@8 proc - ; Save caller registers + ; Save the thread information block: + push fs:[0] + push fs:[4] + push fs:[8] + + ; Save caller registers: push ebp push ebx push edi push esi - - ; Save caller stack pointer + + ; Save caller stack pointer: mov dword ptr [ecx], esp - - ; Restore callee stack pointer + + ; Restore callee stack pointer: mov esp, dword ptr [edx] - ; Restore callee stack + ; Restore callee stack: pop esi pop edi pop ebx pop ebp - ; Save the first argument as the return value + ; Restore the thread information block: + pop fs:[8] + pop fs:[4] + pop fs:[0] + + ; Save the first argument as the return value: mov eax, dword ptr ecx - ; Jump to the address on the stack + ; Jump to the address on the stack: ret @coroutine_transfer@8 endp |