[Bpf] [PATCH bpf-next] Fix definition of BPF

[Bpf] [PATCH bpf-next] Fix definition of BPF_NEG operation

Dave Thaler <dthaler1968@googlemail.com> Tue, 27 June 2023 21:39 UTC

From: Dave Thaler <dthaler1968@googlemail.com>
To: bpf@vger.kernel.org
Cc: bpf@ietf.org, Dave Thaler <dthaler@microsoft.com>
Date: Tue, 27 Jun 2023 21:39:12 +0000
Message-Id: <20230627213912.951-1-dthaler1968@googlemail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/bpf/hWe0ixMYzYio43X_0_Ld2Kihv_k>
Subject: [Bpf] [PATCH bpf-next] Fix definition of BPF_NEG operation
Precedence: list

From: Dave Thaler <dthaler@microsoft.com>

Instruction is an arithmetic negative, not a bitwise inverse.

Signed-off-by: Dave Thaler <dthaler@microsoft.com>
---
 Documentation/bpf/instruction-set.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/bpf/instruction-set.rst b/Documentation/bpf/instruction-set.rst
index 6644842cd3e..751e657973f 100644
--- a/Documentation/bpf/instruction-set.rst
+++ b/Documentation/bpf/instruction-set.rst
@@ -165,7 +165,7 @@ BPF_OR    0x40   dst \|= src
 BPF_AND   0x50   dst &= src
 BPF_LSH   0x60   dst <<= (src & mask)
 BPF_RSH   0x70   dst >>= (src & mask)
-BPF_NEG   0x80   dst = ~src
+BPF_NEG   0x80   dst = -src
 BPF_MOD   0x90   dst = (src != 0) ? (dst % src) : dst
 BPF_XOR   0xa0   dst ^= src
 BPF_MOV   0xb0   dst = src
-- 
2.33.4

[Bpf] [PATCH bpf-next] Fix definition of BPF_NEG … Dave Thaler
Re: [Bpf] [PATCH bpf-next] Fix definition of BPF_… David Vernet