blob: 17d9d47ef40cbc7d3f4e641b012c5cd6d6fd63ab [file] [log] [blame]
// Copyright 2009 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
#define EXT(s) s
* void crosscall_amd64(void (*fn)(void))
* Calling into the 6c tool chain, where all registers are caller save.
* Called from standard x86-64 ABI, where %rbx, %rbp, %r12-%r15
* are callee-save so they must be saved explicitly.
* The standard x86-64 ABI passes the three arguments m, g, fn
* in %rdi, %rsi, %rdx.
.globl EXT(crosscall_amd64)
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
#if defined(_WIN64)
call *%rcx /* fn */
call *%rdi /* fn */
popq %r15
popq %r14
popq %r13
popq %r12
popq %rbp
popq %rbx
#ifdef __ELF__
.section .note.GNU-stack,"",@progbits