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syscall: implement pipe() on linux/mips

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Change the Pipe() function to use the pipe() syscall (which has a unique
calling convention on linux/mips) instead of using pipe2(). This allows
it work on kernels <2.6.27 when pipe2() was introduced.

Change-Id: I65dfbd2a02b64e777a8eb13013d718e356521be6
GitHub-Last-Rev: c483a06168
GitHub-Pull-Request: golang/go#26608
Reviewed-on: https://go-review.googlesource.com/125915
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Vladimir Stefanovic <vladimir.stefanovic@mips.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Wimmer 2018-07-25 19:16:07 +00:00 committed by Ian Lance Taylor
parent e5b13401c6
commit bd98a81dc2
3 changed files with 27 additions and 4 deletions
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7
src/syscall/syscall_linux_mipsx.go
View File

@ -119,14 +119,13 @@ func Pipe2(p []int, flags int) (err error) {
return return
} }
//sysnb pipe() (p1 int, p2 int, err error)
func Pipe(p []int) (err error) { func Pipe(p []int) (err error) {
if len(p) != 2 { if len(p) != 2 {
return EINVAL return EINVAL
} }
var pp [2]_C_int p[0], p[1], err = pipe()
err = pipe2(&pp, 0)
p[0] = int(pp[0])
p[1] = int(pp[1])
return return
} }

12
src/syscall/zsyscall_linux_mips.go
View File

@ -1685,6 +1685,18 @@ func pipe2(p *[2]_C_int, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func pipe() (p1 int, p2 int, err error) {
r0, r1, e1 := RawSyscall(SYS_PIPE, 0, 0, 0)
p1 = int(r0)
p2 = int(r1)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) { func mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) {
r0, _, e1 := Syscall6(SYS_MMAP2, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(pageOffset)) r0, _, e1 := Syscall6(SYS_MMAP2, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(pageOffset))
xaddr = uintptr(r0) xaddr = uintptr(r0)

12
src/syscall/zsyscall_linux_mipsle.go
View File

@ -1685,6 +1685,18 @@ func pipe2(p *[2]_C_int, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func pipe() (p1 int, p2 int, err error) {
r0, r1, e1 := RawSyscall(SYS_PIPE, 0, 0, 0)
p1 = int(r0)
p2 = int(r1)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) { func mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) {
r0, _, e1 := Syscall6(SYS_MMAP2, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(pageOffset)) r0, _, e1 := Syscall6(SYS_MMAP2, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(pageOffset))
xaddr = uintptr(r0) xaddr = uintptr(r0)