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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.
.file "gcc_arm64.S"
/*
* 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):
.cfi_startproc
stp x29, x30, [sp, #-96]!
.cfi_def_cfa_offset 96
.cfi_offset 29, -96
.cfi_offset 30, -88
mov x29, sp
.cfi_def_cfa_register 29
stp x19, x20, [sp, #80]
.cfi_offset 19, -16
.cfi_offset 20, -8
stp x21, x22, [sp, #64]
.cfi_offset 21, -32
.cfi_offset 22, -24
stp x23, x24, [sp, #48]
.cfi_offset 23, -48
.cfi_offset 24, -40
stp x25, x26, [sp, #32]
.cfi_offset 25, -64
.cfi_offset 26, -56
stp x27, x28, [sp, #16]
.cfi_offset 27, -80
.cfi_offset 28, -72
mov x19, x0
mov x20, x1
mov x0, x2
blr x20
blr x19
ldp x27, x28, [sp, #16]
.cfi_restore 27
.cfi_restore 28
ldp x25, x26, [sp, #32]
.cfi_restore 25
.cfi_restore 26
ldp x23, x24, [sp, #48]
.cfi_restore 23
.cfi_restore 24
ldp x21, x22, [sp, #64]
.cfi_restore 21
.cfi_restore 22
ldp x19, x20, [sp, #80]
.cfi_restore 19
.cfi_restore 20
ldp x29, x30, [sp], #96
.cfi_restore 29
.cfi_restore 30
.cfi_def_cfa 31, 0
ret
.cfi_endproc
#ifdef __ELF__
.section .note.GNU-stack,"",%progbits
#endif
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