1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
3
4//go:build freebsd || (linux && !(arm64 || amd64))
5
6package cgo
7
8// this file is placed inside internal/cgo and not package purego
9// because Cgo and assembly files can't be in the same package.
10
11/*
12 #cgo LDFLAGS: -ldl
13
14#include <stdint.h>
15#include <dlfcn.h>
16#include <errno.h>
17#include <assert.h>
18
19typedef struct syscall15Args {
20 uintptr_t fn;
21 uintptr_t a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15;
22 uintptr_t f1, f2, f3, f4, f5, f6, f7, f8;
23 uintptr_t r1, r2, err;
24} syscall15Args;
25
26void syscall15(struct syscall15Args *args) {
27 assert((args->f1|args->f2|args->f3|args->f4|args->f5|args->f6|args->f7|args->f8) == 0);
28 uintptr_t (*func_name)(uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6,
29 uintptr_t a7, uintptr_t a8, uintptr_t a9, uintptr_t a10, uintptr_t a11, uintptr_t a12,
30 uintptr_t a13, uintptr_t a14, uintptr_t a15);
31 *(void**)(&func_name) = (void*)(args->fn);
32 uintptr_t r1 = func_name(args->a1,args->a2,args->a3,args->a4,args->a5,args->a6,args->a7,args->a8,args->a9,
33 args->a10,args->a11,args->a12,args->a13,args->a14,args->a15);
34 args->r1 = r1;
35 args->err = errno;
36}
37
38*/
39import "C"
40import "unsafe"
41
42// assign purego.syscall15XABI0 to the C version of this function.
43var Syscall15XABI0 = unsafe.Pointer(C.syscall15)
44
45//go:nosplit
46func Syscall15X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15 uintptr) (r1, r2, err uintptr) {
47 args := C.syscall15Args{
48 C.uintptr_t(fn), C.uintptr_t(a1), C.uintptr_t(a2), C.uintptr_t(a3),
49 C.uintptr_t(a4), C.uintptr_t(a5), C.uintptr_t(a6),
50 C.uintptr_t(a7), C.uintptr_t(a8), C.uintptr_t(a9), C.uintptr_t(a10), C.uintptr_t(a11), C.uintptr_t(a12),
51 C.uintptr_t(a13), C.uintptr_t(a14), C.uintptr_t(a15), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
52 }
53 C.syscall15(&args)
54 return uintptr(args.r1), uintptr(args.r2), uintptr(args.err)
55}