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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
* Apple still insists on underscore prefixes for C function names.
*/
#if defined(__APPLE__)
#define EXT(s) _##s
#else
#define EXT(s) s
#endif
// Apple's ld64 wants 4-byte alignment for ARM code sections.
// .align in both Apple as and GNU as treat n as aligning to 2**n bytes.
.align 2
/*
* void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
*
* Calling into the gc tool chain, where all registers are caller save.
* Called from standard ARM EABI, where x19-x29 are callee-save, so they
* must be saved explicitly, along with x30 (LR).
*/
.globl EXT(crosscall1)
EXT(crosscall1):
stp x19, x20, [sp, #-16]!
stp x21, x22, [sp, #-16]!
stp x23, x24, [sp, #-16]!
stp x25, x26, [sp, #-16]!
stp x27, x28, [sp, #-16]!
stp x29, x30, [sp, #-16]!
mov x29, sp
mov x19, x0
mov x20, x1
mov x0, x2
blr x20
blr x19
ldp x29, x30, [sp], #16
ldp x27, x28, [sp], #16
ldp x25, x26, [sp], #16
ldp x23, x24, [sp], #16
ldp x21, x22, [sp], #16
ldp x19, x20, [sp], #16
ret
#ifdef __ELF__
.section .note.GNU-stack,"",%progbits
#endif
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