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##
## 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.
##
#define TOKEN_PASTE(x,y) x##y
#define PREFIXED_SYMBOL(prefix,name) TOKEN_PASTE(prefix,name)
.file "Context.S"
.text
.globl PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer)
.align 2
.type PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer),%function
.syntax unified
PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer):
# Save caller state (8 registers + return address)
push {r4-r11,lr}
# Save caller stack pointer
str sp, [r0]
# Restore callee stack pointer
ldr sp, [r1]
# Restore callee state (8 registers program counter)
pop {r4-r11,pc}
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