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syscall: generate readlen/writelen for openbsd libc

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Rather than hand rolling readlen and writelen, move it to being generated
via mksyscall.pl, as is done for most other functions.

Updates #36435

Change-Id: I649aed7b182b41c8639686feae25ce19dab812c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/287532
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Joel Sing 2021-01-28 19:19:47 +11:00
parent 41bb49b878
commit c8bd8010ff
3 changed files with 50 additions and 22 deletions
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28
src/syscall/syscall_openbsd_libc.go
View File

@ -8,6 +8,10 @@ package syscall
import "unsafe"
func init() {
execveOpenBSD = execve
}
//sys directSyscall(trap uintptr, a1 uintptr, a2 uintptr, a3 uintptr, a4 uintptr, a5 uintptr) (ret uintptr, err error) = SYS_syscall
func syscallInternal(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
@ -56,6 +60,8 @@ func funcPC(f func()) uintptr {
return **(**uintptr)(unsafe.Pointer(&f))
}
//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_read
//sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_write
//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_lseek
//sys getcwd(buf []byte) (n int, err error)
//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error)
@ -69,25 +75,3 @@ func funcPC(f func()) uintptr {
//sys fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_fcntl
//sys unlinkat(fd int, path string, flags int) (err error)
//sys openat(fd int, path string, flags int, perm uint32) (fdret int, err error)
func init() {
execveOpenBSD = execve
}
func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

22
src/syscall/zsyscall_openbsd_amd64.go
View File

@ -1761,6 +1761,28 @@ func libc_syscall_trampoline()
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
r0, _, e1 := syscallX(funcPC(libc_lseek_trampoline), uintptr(fd), uintptr(offset), uintptr(whence))
newoffset = int64(r0)

22
src/syscall/zsyscall_openbsd_arm64.go
View File

@ -1761,6 +1761,28 @@ func libc_syscall_trampoline()
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
r0, _, e1 := syscallX(funcPC(libc_lseek_trampoline), uintptr(fd), uintptr(offset), uintptr(whence))
newoffset = int64(r0)