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runtime: return errno value from Solaris mmap as expected

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The code in mem_bsd.go expects that when mmap fails it will return a
positive errno value.  This fixes the Solaris implementation of mmap to
work as expected.

Change-Id: Id1c34a9b916e8dc955ced90ea2f4af8321d92265
Reviewed-on: https://go-review.googlesource.com/19477
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Ian Lance Taylor 2016-02-11 18:09:34 -08:00
parent 68aa7fb636
commit c93193aec0
1 changed files with 15 additions and 1 deletions
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16
src/runtime/os3_solaris.go
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@ -442,7 +442,21 @@ func madvise(addr unsafe.Pointer, n uintptr, flags int32) {
//go:nosplit
func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) unsafe.Pointer {
return unsafe.Pointer(sysvicall6(&libc_mmap, uintptr(addr), uintptr(n), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(off)))
p, err := doMmap(uintptr(addr), n, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(off))
if p == ^uintptr(0) {
return unsafe.Pointer(err)
}
return unsafe.Pointer(p)
}
//go:nosplit
func doMmap(addr, n, prot, flags, fd, off uintptr) (uintptr, uintptr) {
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(&libc_mmap))
libcall.n = 6
libcall.args = uintptr(noescape(unsafe.Pointer(&addr)))
asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
return libcall.r1, libcall.err
}
//go:nosplit