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66 lines
2.1 KiB
66 lines
2.1 KiB
// +build linux,cgo
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package psx // import "kernel.org/pub/linux/libs/security/libcap/psx"
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import (
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"runtime"
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"syscall"
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)
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// #cgo LDFLAGS: -lpthread -Wl,-wrap,pthread_create
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//
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// #include <errno.h>
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// #include "psx_syscall.h"
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//
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// long __errno_too(long set_errno) {
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// long v = errno;
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// if (set_errno >= 0) {
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// errno = set_errno;
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// }
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// return v;
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// }
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import "C"
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// setErrno returns the current C.errno value and, if v >= 0, sets the
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// CGo errno for a random pthread to value v. If you want some
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// consistency, this needs to be called from runtime.LockOSThread()
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// code. This function is only defined for testing purposes. The psx.c
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// code should properly handle the case that a non-zero errno is saved
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// and restored independently of what these Syscall[36]() functions
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// observe.
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func setErrno(v int) int {
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return int(C.__errno_too(C.long(v)))
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}
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// Syscall3 performs a 3 argument syscall using the libpsx C function
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// psx_syscall3(). Syscall3 differs from syscall.[Raw]Syscall()
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// insofar as it is simultaneously executed on every pthread of the
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// combined Go and CGo runtimes.
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func Syscall3(syscallnr, arg1, arg2, arg3 uintptr) (uintptr, uintptr, syscall.Errno) {
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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v := C.psx_syscall3(C.long(syscallnr), C.long(arg1), C.long(arg2), C.long(arg3))
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var errno syscall.Errno
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if v < 0 {
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errno = syscall.Errno(C.__errno_too(-1))
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}
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return uintptr(v), uintptr(v), errno
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}
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// Syscall6 performs a 6 argument syscall using the libpsx C function
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// psx_syscall6(). Syscall6 differs from syscall.[Raw]Syscall6() insofar as
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// it is simultaneously executed on every pthread of the combined Go
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// and CGo runtimes.
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func Syscall6(syscallnr, arg1, arg2, arg3, arg4, arg5, arg6 uintptr) (uintptr, uintptr, syscall.Errno) {
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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v := C.psx_syscall6(C.long(syscallnr), C.long(arg1), C.long(arg2), C.long(arg3), C.long(arg4), C.long(arg5), C.long(arg6))
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var errno syscall.Errno
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if v < 0 {
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errno = syscall.Errno(C.__errno_too(-1))
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}
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return uintptr(v), uintptr(v), errno
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}
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