Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add coroutine context switch for i386-mingw32
It's essentially a translation of Context.asm from Intel to AT&T syntax.
- Loading branch information
Showing
2 changed files
with
50 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,47 @@ | ||
## | ||
## This file is part of the "Coroutine" project and released under the MIT License. | ||
## | ||
## Created by Lars Kanis on 06/06/2019. | ||
## | ||
|
||
.text | ||
|
||
# Using fastcall is a big win (and it's the same as 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. | ||
|
||
.globl @coroutine_transfer@8 | ||
@coroutine_transfer@8: | ||
# Save the thread information block: | ||
pushl %fs:0 | ||
pushl %fs:4 | ||
pushl %fs:8 | ||
|
||
# Save caller registers: | ||
pushl %ebp | ||
pushl %ebx | ||
pushl %edi | ||
pushl %esi | ||
|
||
# Save caller stack pointer: | ||
movl %esp, (%ecx) | ||
|
||
# Restore callee stack pointer: | ||
movl (%edx), %esp | ||
|
||
# Restore callee stack: | ||
popl %esi | ||
popl %edi | ||
popl %ebx | ||
popl %ebp | ||
|
||
# Restore the thread information block: | ||
popl %fs:8 | ||
popl %fs:4 | ||
popl %fs:0 | ||
|
||
# Save the first argument as the return value: | ||
movl %ecx, %eax | ||
|
||
# Jump to the address on the stack: | ||
ret |