From: Song Liu <song@kernel.org>
To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <ast@kernel.org>, <daniel@iogearbox.net>, <andrii@kernel.org>,
<kernel-team@fb.com>, <peterz@infradead.org>, <x86@kernel.org>,
<iii@linux.ibm.com>, Song Liu <song@kernel.org>
Subject: [PATCH v8 bpf-next 4/9] bpf: use prog->jited_len in bpf_prog_ksym_set_addr()
Date: Mon, 31 Jan 2022 22:27:58 -0800 [thread overview]
Message-ID: <20220201062803.2675204-5-song@kernel.org> (raw)
In-Reply-To: <20220201062803.2675204-1-song@kernel.org>
Using prog->jited_len is simpler and more accurate than current
estimation (header + header->size).
Signed-off-by: Song Liu <song@kernel.org>
---
kernel/bpf/core.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 14199228a6f0..e3fe53df0a71 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -537,13 +537,10 @@ long bpf_jit_limit_max __read_mostly;
static void
bpf_prog_ksym_set_addr(struct bpf_prog *prog)
{
- const struct bpf_binary_header *hdr = bpf_jit_binary_hdr(prog);
- unsigned long addr = (unsigned long)hdr;
-
WARN_ON_ONCE(!bpf_prog_ebpf_jited(prog));
prog->aux->ksym.start = (unsigned long) prog->bpf_func;
- prog->aux->ksym.end = addr + hdr->size;
+ prog->aux->ksym.end = prog->aux->ksym.start + prog->jited_len;
}
static void
--
2.30.2
next prev parent reply other threads:[~2022-02-01 6:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-01 6:27 [PATCH v8 bpf-next 0/9] bpf_prog_pack allocator Song Liu
2022-02-01 6:27 ` [PATCH v8 bpf-next 1/9] x86/Kconfig: select HAVE_ARCH_HUGE_VMALLOC with HAVE_ARCH_HUGE_VMAP Song Liu
2022-02-01 6:27 ` [PATCH v8 bpf-next 2/9] bpf: use bytes instead of pages for bpf_jit_[charge|uncharge]_modmem Song Liu
2022-02-01 6:27 ` [PATCH v8 bpf-next 3/9] bpf: use size instead of pages in bpf_binary_header Song Liu
2022-02-01 6:27 ` Song Liu [this message]
2022-02-04 7:41 ` [PATCH v8 bpf-next 4/9] bpf: use prog->jited_len in bpf_prog_ksym_set_addr() Song Liu
2022-02-04 18:05 ` Song Liu
2022-02-01 6:27 ` [PATCH v8 bpf-next 5/9] x86/alternative: introduce text_poke_copy Song Liu
2022-02-01 6:28 ` [PATCH v8 bpf-next 6/9] bpf: introduce bpf_arch_text_copy Song Liu
2022-02-01 6:28 ` [PATCH v8 bpf-next 7/9] bpf: introduce bpf_prog_pack allocator Song Liu
2022-02-01 6:28 ` [PATCH v8 bpf-next 8/9] bpf: introduce bpf_jit_binary_pack_[alloc|finalize|free] Song Liu
2022-02-01 6:28 ` [PATCH v8 bpf-next 9/9] bpf, x86_64: use bpf_jit_binary_pack_alloc Song Liu
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