2018-11-20 04:59:10 -05:00
|
|
|
##
|
2018-11-20 05:16:29 -05:00
|
|
|
## This file is part of the "Coroutine" project and released under the MIT License.
|
2018-11-20 04:59:10 -05:00
|
|
|
##
|
|
|
|
|
## Created by Samuel Williams on 10/5/2018.
|
2019-12-27 18:41:47 -05:00
|
|
|
## Copyright, 2018, by Samuel Williams.
|
2018-11-20 04:59:10 -05:00
|
|
|
##
|
|
|
|
|
|
2020-07-05 04:27:12 -04:00
|
|
|
#define TOKEN_PASTE(x,y) x##y
|
|
|
|
|
#define PREFIXED_SYMBOL(prefix,name) TOKEN_PASTE(prefix,name)
|
|
|
|
|
|
2021-03-05 15:47:19 -05:00
|
|
|
#if defined(__APPLE__)
|
|
|
|
|
#define x29 fp
|
|
|
|
|
#define x30 lr
|
2021-03-31 16:28:58 -04:00
|
|
|
.text
|
|
|
|
|
.p2align 2
|
|
|
|
|
#else
|
2018-11-20 04:59:10 -05:00
|
|
|
.text
|
|
|
|
|
.align 2
|
2021-03-31 16:28:58 -04:00
|
|
|
#endif
|
2018-11-20 05:17:00 -05:00
|
|
|
|
2020-07-05 04:27:12 -04:00
|
|
|
.global PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer)
|
|
|
|
|
PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer):
|
2018-11-20 05:17:00 -05:00
|
|
|
|
2018-11-20 04:59:10 -05:00
|
|
|
# Make space on the stack for caller registers
|
|
|
|
|
sub sp, sp, 0xb0
|
2020-07-05 04:12:20 -04:00
|
|
|
|
2018-11-20 04:59:10 -05:00
|
|
|
# Save caller registers
|
|
|
|
|
stp d8, d9, [sp, 0x00]
|
|
|
|
|
stp d10, d11, [sp, 0x10]
|
|
|
|
|
stp d12, d13, [sp, 0x20]
|
|
|
|
|
stp d14, d15, [sp, 0x30]
|
|
|
|
|
stp x19, x20, [sp, 0x40]
|
|
|
|
|
stp x21, x22, [sp, 0x50]
|
|
|
|
|
stp x23, x24, [sp, 0x60]
|
|
|
|
|
stp x25, x26, [sp, 0x70]
|
|
|
|
|
stp x27, x28, [sp, 0x80]
|
|
|
|
|
stp x29, x30, [sp, 0x90]
|
|
|
|
|
|
|
|
|
|
# Save return address
|
|
|
|
|
str x30, [sp, 0xa0]
|
|
|
|
|
|
|
|
|
|
# Save stack pointer to x0 (first argument)
|
|
|
|
|
mov x2, sp
|
|
|
|
|
str x2, [x0, 0]
|
|
|
|
|
|
|
|
|
|
# Load stack pointer from x1 (second argument)
|
|
|
|
|
ldr x3, [x1, 0]
|
|
|
|
|
mov sp, x3
|
|
|
|
|
|
|
|
|
|
# Restore caller registers
|
|
|
|
|
ldp d8, d9, [sp, 0x00]
|
|
|
|
|
ldp d10, d11, [sp, 0x10]
|
|
|
|
|
ldp d12, d13, [sp, 0x20]
|
|
|
|
|
ldp d14, d15, [sp, 0x30]
|
|
|
|
|
ldp x19, x20, [sp, 0x40]
|
|
|
|
|
ldp x21, x22, [sp, 0x50]
|
|
|
|
|
ldp x23, x24, [sp, 0x60]
|
|
|
|
|
ldp x25, x26, [sp, 0x70]
|
|
|
|
|
ldp x27, x28, [sp, 0x80]
|
|
|
|
|
ldp x29, x30, [sp, 0x90]
|
|
|
|
|
|
|
|
|
|
# Load return address into x4
|
|
|
|
|
ldr x4, [sp, 0xa0]
|
|
|
|
|
|
|
|
|
|
# Pop stack frame
|
|
|
|
|
add sp, sp, 0xb0
|
|
|
|
|
|
|
|
|
|
# Jump to return address (in x4)
|
|
|
|
|
ret x4
|
2021-03-04 16:43:23 -05:00
|
|
|
|
|
|
|
|
#if defined(__linux__) && defined(__ELF__)
|
|
|
|
|
.section .note.GNU-stack,"",%progbits
|
|
|
|
|
#endif
|
