86f8778748
Go 1.12 switched to using libSystem.dylib for system calls, because Apple recommends against doing direct system calls that Go 1.11 and earlier did. For more information, see: https://github.com/golang/go/issues/17490 https://developer.apple.com/library/archive/qa/qa1118/_index.html While the old syscall package was relatively easy to support in TinyGo (just implement syscall.Syscall*), this got a whole lot harder with Go 1.12 as all syscalls now go through CGo magic to call the underlying libSystem functions. Therefore, this commit overrides the stdlib syscall package with a custom package that performs calls with libc (libSystem). This may be useful not just for darwin but for other platforms as well that do not place the stable ABI at the syscall boundary like Linux but at the libc boundary. Only a very minimal part of the syscall package has been implemented, to get the tests to pass. More calls can easily be added in the future.
51 строка
1,1 КиБ
Go
51 строка
1,1 КиБ
Go
package syscall
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// This file defines errno and constants to match the darwin libsystem ABI.
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// Values have been determined experimentally by compiling some C code on macOS
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// with Clang and looking at the resulting LLVM IR.
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// This function returns the error location in the darwin ABI.
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// Discovered by compiling the following code using Clang:
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//
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// #include <errno.h>
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// int getErrno() {
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// return errno;
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// }
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//
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//go:export __error
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func libc___error() *int32
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// getErrno returns the current C errno. It may not have been caused by the last
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// call, so it should only be relied upon when the last call indicates an error
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// (for example, by returning -1).
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func getErrno() Errno {
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errptr := libc___error()
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return Errno(uintptr(*errptr))
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}
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const (
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ENOENT Errno = 2
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EINTR Errno = 4
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EMFILE Errno = 24
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EAGAIN Errno = 35
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ETIMEDOUT Errno = 60
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ENOSYS Errno = 78
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EWOULDBLOCK Errno = EAGAIN
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)
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type Signal int
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const (
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SIGCHLD Signal = 20
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SIGINT Signal = 2
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SIGKILL Signal = 9
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SIGTRAP Signal = 5
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SIGQUIT Signal = 3
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SIGTERM Signal = 15
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)
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const (
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O_RDONLY = 0
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O_WRONLY = 1
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O_RDWR = 2
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)
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