From: Masami Hiramatsu <mhiramat@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Masami Hiramatsu <mhiramat@kernel.org>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
"David S . Miller" <davem@davemloft.net>,
linux-kernel@vger.kernel.org
Subject: [PATCH -tip v3 2/2] kprobes/x86: Remove addressof operators
Date: Fri, 18 Aug 2017 17:25:08 +0900 [thread overview]
Message-ID: <150304469798.17009.15886717935027472863.stgit@devbox> (raw)
In-Reply-To: <150304456422.17009.11803713159528262211.stgit@devbox>
Since commit 54a7d50b9205 ("x86: mark kprobe templates as
character arrays, not single characters") changes
optprobe_template_* to arrays, we can remove addressof
operators from those symbols.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
arch/x86/include/asm/kprobes.h | 4 ++--
arch/x86/kernel/kprobes/opt.c | 8 ++++----
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/kprobes.h b/arch/x86/include/asm/kprobes.h
index 6cf65437b5e5..9f2e3102e0bb 100644
--- a/arch/x86/include/asm/kprobes.h
+++ b/arch/x86/include/asm/kprobes.h
@@ -58,8 +58,8 @@ extern __visible kprobe_opcode_t optprobe_template_call[];
extern __visible kprobe_opcode_t optprobe_template_end[];
#define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + RELATIVE_ADDR_SIZE)
#define MAX_OPTINSN_SIZE \
- (((unsigned long)&optprobe_template_end - \
- (unsigned long)&optprobe_template_entry) + \
+ (((unsigned long)optprobe_template_end - \
+ (unsigned long)optprobe_template_entry) + \
MAX_OPTIMIZED_LENGTH + RELATIVEJUMP_SIZE)
extern const int kretprobe_blacklist_size;
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index 22e65f0b8b34..0cae7c0f32ec 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -142,11 +142,11 @@ void optprobe_template_func(void);
STACK_FRAME_NON_STANDARD(optprobe_template_func);
#define TMPL_MOVE_IDX \
- ((long)&optprobe_template_val - (long)&optprobe_template_entry)
+ ((long)optprobe_template_val - (long)optprobe_template_entry)
#define TMPL_CALL_IDX \
- ((long)&optprobe_template_call - (long)&optprobe_template_entry)
+ ((long)optprobe_template_call - (long)optprobe_template_entry)
#define TMPL_END_IDX \
- ((long)&optprobe_template_end - (long)&optprobe_template_entry)
+ ((long)optprobe_template_end - (long)optprobe_template_entry)
#define INT3_SIZE sizeof(kprobe_opcode_t)
@@ -371,7 +371,7 @@ int arch_prepare_optimized_kprobe(struct optimized_kprobe *op,
}
/* Copy arch-dep-instance from template */
- memcpy(buf, &optprobe_template_entry, TMPL_END_IDX);
+ memcpy(buf, optprobe_template_entry, TMPL_END_IDX);
/* Copy instructions into the out-of-line buffer */
ret = copy_optimized_instructions(buf + TMPL_END_IDX, op->kp.addr,
next prev parent reply other threads:[~2017-08-18 8:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-18 8:22 [PATCH -tip v3 0/2] kprobes/x86: Another way to make insn buffer RO and cleanup Masami Hiramatsu
2017-08-18 8:24 ` [PATCH -tip v3 1/2] kprobes/x86: Make insn buffer always ROX and use text_poke Masami Hiramatsu
2017-09-28 10:51 ` [tip:perf/core] kprobes/x86: Make insn buffer always ROX and use text_poke() tip-bot for Masami Hiramatsu
2017-08-18 8:25 ` Masami Hiramatsu [this message]
2017-09-28 10:52 ` [tip:perf/core] kprobes/x86: Remove addressof() operators tip-bot for Masami Hiramatsu
2017-08-28 2:28 ` [PATCH -tip v3 0/2] kprobes/x86: Another way to make insn buffer RO and cleanup Masami Hiramatsu
2017-09-11 10:28 ` Masami Hiramatsu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=150304469798.17009.15886717935027472863.stgit@devbox \
--to=mhiramat@kernel.org \
--cc=ananth@in.ibm.com \
--cc=anil.s.keshavamurthy@intel.com \
--cc=davem@davemloft.net \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox