ruby/coroutine/x86/Context.S
Nobuyoshi Nakada 1f39184bc7 Substitute coroutine_transfer with prefixed symbol in Makefile
```
coroutine/arm64/Context.S:31:57: error: invoking macro TOKEN_PASTE argument 1: empty macro arguments are undefined in ISO C90 [-Wpedantic]
   31 | .global PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer)
      |                                                         ^
```
2024-10-08 23:29:49 +09:00

42 lines
765 B
ArmAsm

##
## 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