syscall: support rawVforkSyscall on linux/riscv64
Updates #31936
Change-Id: I7dcb8987d4c306ccc97704b9c1b12313ba8bf242
Reviewed-on: https://go-review.googlesource.com/c/go/+/234960
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/syscall/asm_linux_riscv64.s b/src/syscall/asm_linux_riscv64.s
index ad0b6b1..f172dd3 100644
--- a/src/syscall/asm_linux_riscv64.s
+++ b/src/syscall/asm_linux_riscv64.s
@@ -104,6 +104,28 @@
MOV A0, err+72(FP) // errno
RET
+// func rawVforkSyscall(trap, a1 uintptr) (r1, err uintptr)
+TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-32
+ MOV a1+8(FP), A0
+ MOV ZERO, A1
+ MOV ZERO, A2
+ MOV ZERO, A3
+ MOV ZERO, A4
+ MOV ZERO, A5
+ MOV trap+0(FP), A7 // syscall entry
+ ECALL
+ MOV $-4096, T0
+ BLTU T0, A0, err
+ MOV A0, r1+16(FP) // r1
+ MOV ZERO, err+24(FP) // errno
+ RET
+err:
+ MOV $-1, T0
+ MOV T0, r1+16(FP) // r1
+ SUB A0, ZERO, A0
+ MOV A0, err+24(FP) // errno
+ RET
+
TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48
MOV a1+8(FP), A0
MOV a2+16(FP), A1
diff --git a/src/syscall/exec_linux.go b/src/syscall/exec_linux.go
index b7351cd..b6acad9 100644
--- a/src/syscall/exec_linux.go
+++ b/src/syscall/exec_linux.go
@@ -207,7 +207,11 @@
}
}
- hasRawVforkSyscall := runtime.GOARCH == "amd64" || runtime.GOARCH == "ppc64" || runtime.GOARCH == "s390x" || runtime.GOARCH == "arm64"
+ var hasRawVforkSyscall bool
+ switch runtime.GOARCH {
+ case "amd64", "arm64", "ppc64", "riscv64", "s390x":
+ hasRawVforkSyscall = true
+ }
// About to call fork.
// No more allocation or calls of non-assembly functions.
diff --git a/src/syscall/syscall_linux_riscv64.go b/src/syscall/syscall_linux_riscv64.go
index d54bd38..088e234 100644
--- a/src/syscall/syscall_linux_riscv64.go
+++ b/src/syscall/syscall_linux_riscv64.go
@@ -199,6 +199,4 @@
return err
}
-func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno) {
- panic("not implemented")
-}
+func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno)
