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unix: add Readv, Writev, Preadv, Pwritev for OpenBSD

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Add OpenBSD libc syscall wrappers for vectored I/O, and share the
existing Darwin wrapper implementation and tests.

Fixes golang/go#78049

Change-Id: Ie2743ef36a5cb73b05cc551c9c1108503f5992b6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/771300
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This commit is contained in:
Aaqa Ishtyaq
2026-05-12 12:53:07 -07:00
committed by Gopher Robot
parent fb1facd76f
commit 04396e85d4
18 changed files with 968 additions and 89 deletions
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unix/zsyscall_openbsd_386.s
+20
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@@ -498,6 +498,26 @@ TEXT libc_pwrite_trampoline<>(SB),NOSPLIT,$0-0
GLOBL ·libc_pwrite_trampoline_addr(SB), RODATA, $4
DATA ·libc_pwrite_trampoline_addr(SB)/4, $libc_pwrite_trampoline<>(SB)
TEXT libc_readv_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_readv(SB)
GLOBL ·libc_readv_trampoline_addr(SB), RODATA, $4
DATA ·libc_readv_trampoline_addr(SB)/4, $libc_readv_trampoline<>(SB)
TEXT libc_writev_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_writev(SB)
GLOBL ·libc_writev_trampoline_addr(SB), RODATA, $4
DATA ·libc_writev_trampoline_addr(SB)/4, $libc_writev_trampoline<>(SB)
TEXT libc_preadv_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_preadv(SB)
GLOBL ·libc_preadv_trampoline_addr(SB), RODATA, $4
DATA ·libc_preadv_trampoline_addr(SB)/4, $libc_preadv_trampoline<>(SB)
TEXT libc_pwritev_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_pwritev(SB)
GLOBL ·libc_pwritev_trampoline_addr(SB), RODATA, $4
DATA ·libc_pwritev_trampoline_addr(SB)/4, $libc_pwritev_trampoline<>(SB)
TEXT libc_read_trampoline<>(SB),NOSPLIT,$0-0
JMP libc_read(SB)
GLOBL ·libc_read_trampoline_addr(SB), RODATA, $4