49 lines
1.8 KiB
Go
49 lines
1.8 KiB
Go
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// syscall.go -- Basic syscall interface.
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This package contains an interface to the low-level operating system
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// primitives. The details vary depending on the underlying system.
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// Its primary use is inside other packages that provide a more portable
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// interface to the system, such as "os", "time" and "net". Use those
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// packages rather than this one if you can.
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// For details of the functions and data types in this package consult
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// the manuals for the appropriate operating system.
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package syscall
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import "unsafe"
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func libc_syscall32(trap int32, a1, a2, a3, a4, a5, a6 int32) int32 __asm__ ("syscall");
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func libc_syscall64(trap int64, a1, a2, a3, a4, a5, a6 int64) int64 __asm__ ("syscall");
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// Do a system call. We look at the size of uintptr to see how to pass
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// the arguments, so that we don't pass a 64-bit value when the function
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// expects a 32-bit one.
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func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
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var r uintptr;
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if unsafe.Sizeof(r) == 4 {
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r1 := libc_syscall32(int32(trap), int32(a1), int32(a2), int32(a3), 0, 0, 0);
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r = uintptr(r1);
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} else {
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r1 := libc_syscall64(int64(trap), int64(a1), int64(a2), int64(a3), 0, 0, 0);
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r = uintptr(r1);
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}
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return r, 0, uintptr(GetErrno());
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}
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func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
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var r uintptr;
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if unsafe.Sizeof(r) == 4 {
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r1 := libc_syscall32(int32(trap), int32(a1), int32(a2), int32(a3),
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int32(a4), int32(a5), int32(a6));
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r = uintptr(r1);
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} else {
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r1 := libc_syscall64(int64(trap), int64(a1), int64(a2), int64(a3),
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int64(a4), int64(a5), int64(a6));
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r = uintptr(r1);
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}
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return r, 0, uintptr(GetErrno());
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}
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