unix: use libc stubs for OpenBSD pledge+unveil
Future OpenBSD releases will remove the syscall(2) interface.
This converts the Pledge and Unveil calls to use pledge(2) and
unveil(2) from libc, rather than indirectly through syscall(2).
Updates golang/go#63900.
Change-Id: I61e22d8f52f16c8f5e4c0717acae0d5bf4271503
GitHub-Last-Rev: ebc0461460297de6d4f677a48d3a361d7e620df0
GitHub-Pull-Request: golang/sys#146
Reviewed-on: https://go-review.googlesource.com/c/sys/+/468095
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Aaron Bieber <aaron@bolddaemon.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
diff --git a/unix/zsyscall_openbsd_riscv64.s b/unix/zsyscall_openbsd_riscv64.s
index 477a7d5..27130c6 100644
--- a/unix/zsyscall_openbsd_riscv64.s
+++ b/unix/zsyscall_openbsd_riscv64.s
@@ -672,3 +672,13 @@
JMP libc_utimensat(SB)
GLOBL ·libc_utimensat_trampoline_addr(SB), RODATA, $8
DATA ·libc_utimensat_trampoline_addr(SB)/8, $libc_utimensat_trampoline<>(SB)
+
+TEXT libc_pledge_trampoline<>(SB),NOSPLIT,$0-0
+ JMP libc_pledge(SB)
+GLOBL ·libc_pledge_trampoline_addr(SB), RODATA, $8
+DATA ·libc_pledge_trampoline_addr(SB)/8, $libc_pledge_trampoline<>(SB)
+
+TEXT libc_unveil_trampoline<>(SB),NOSPLIT,$0-0
+ JMP libc_unveil(SB)
+GLOBL ·libc_unveil_trampoline_addr(SB), RODATA, $8
+DATA ·libc_unveil_trampoline_addr(SB)/8, $libc_unveil_trampoline<>(SB)
