diff options
Diffstat (limited to 'libgo/go/runtime/stubs.go')
| -rw-r--r-- | libgo/go/runtime/stubs.go | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/libgo/go/runtime/stubs.go b/libgo/go/runtime/stubs.go index 3ff3aef2216..bbeac41a4dc 100644 --- a/libgo/go/runtime/stubs.go +++ b/libgo/go/runtime/stubs.go @@ -38,12 +38,7 @@ func getg() *g func mcall(fn func(*g)) // systemstack runs fn on a system stack. -// If systemstack is called from the per-OS-thread (g0) stack, or -// if systemstack is called from the signal handling (gsignal) stack, -// systemstack calls fn directly and returns. -// Otherwise, systemstack is being called from the limited stack -// of an ordinary goroutine. In this case, systemstack switches -// to the per-OS-thread stack, calls fn, and switches back. +// // It is common to use a func literal as the argument, in order // to share inputs and outputs with the code around the call // to system stack: @@ -54,8 +49,14 @@ func mcall(fn func(*g)) // }) // ... use x ... // -//go:noescape -func systemstack(fn func()) +// For the gc toolchain this permits running a function that requires +// additional stack space in a context where the stack can not be +// split. For gccgo, however, stack splitting is not managed by the +// Go runtime. In effect, all stacks are system stacks. So this gccgo +// version just runs the function. +func systemstack(fn func()) { + fn() +} func badsystemstack() { throw("systemstack called from unexpected goroutine") @@ -215,6 +216,13 @@ func checkASM() bool { return true } +// For gccgo this is in the C code. +func osyield() + +// For gccgo this can be called directly. +//extern syscall +func syscall(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) uintptr + // throw crashes the program. // For gccgo unless and until we port panic.go. func throw(string) @@ -368,3 +376,11 @@ func casp(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool { // Here for gccgo until we port lock_*.go. func lock(l *mutex) func unlock(l *mutex) + +// Here for gccgo for Solaris. +func errno() int + +// Temporary for gccgo until we port proc.go. +func entersyscall(int32) +func entersyscallblock(int32) +func exitsyscall(int32) |