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Diffstat (limited to 'coroutine/x86/Context.S')
| -rw-r--r-- | coroutine/x86/Context.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/coroutine/x86/Context.S b/coroutine/x86/Context.S new file mode 100644 index 0000000000..b04e71aa1c --- /dev/null +++ b/coroutine/x86/Context.S @@ -0,0 +1,41 @@ +## +## This file is part of the "Coroutine" project and released under the MIT License. +## +## Created by Samuel Williams on 3/11/2018. +## Copyright, 2018, by Samuel Williams. +## + +#define TOKEN_PASTE(x,y) x##y + +.text + +.globl PREFIXED_SYMBOL(coroutine_transfer) +PREFIXED_SYMBOL(coroutine_transfer): + + # 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 + + # Save the first argument as the return value + movl %ecx, %eax + + # Jump to the address on the stack + ret + +#if (defined(__linux__) || defined(__FreeBSD__)) && defined(__ELF__) +.section .note.GNU-stack,"",%progbits +#endif |