From: Wang Nan <wangnan0@huawei.com>
To: <linux@arm.linux.org.uk>
Cc: <rostedt@goodmis.org>, <lizefan@huawei.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <x86@kernel.org>
Subject: [RFC PATCH 2/3] early kprobes: x86: add definition for vmlinux.lds use.
Date: Sun, 15 Feb 2015 16:27:09 +0800 [thread overview]
Message-ID: <1423988829-7258-1-git-send-email-wangnan0@huawei.com> (raw)
In-Reply-To: <1423988798-7104-1-git-send-email-wangnan0@huawei.com>
This patch defines MAX_OPTINSN_SIZE, MAX_INSN_SIZE and
KPROBE_OPCODE_SIZE for x86 for vmlinux.lds.S use.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
---
arch/x86/kernel/vmlinux.lds.S | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 00bf300..e46d877 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -29,6 +29,16 @@
#undef i386 /* in case the preprocessor is a 32bit one */
+#ifdef CONFIG_EARLY_KPROBES
+# define MAX_INSN_SIZE 16
+# define RELATIVE_ADDR_SIZE 4
+# define RELATIVEJUMP_SIZE 5
+# define KPROBE_OPCODE_SIZE 1
+# define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + RELATIVE_ADDR_SIZE)
+# define MAX_OPTINSN_SIZE ((optprobe_template_end - optprobe_template_entry) + \
+ MAX_OPTIMIZED_LENGTH + RELATIVEJUMP_SIZE)
+#endif
+
OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)
#ifdef CONFIG_X86_32
--
1.8.4
next prev parent reply other threads:[~2015-02-15 8:36 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-12 12:17 [RFC PATCH v2 00/26] Early kprobe: enable kprobes at very early booting stage Wang Nan
2015-02-12 12:19 ` [RFC PATCH v2 01/26] kprobes: set kprobes_all_disarmed earlier to enable re-optimization Wang Nan
2015-02-12 12:19 ` [RFC PATCH v2 02/26] kprobes: makes kprobes/enabled works correctly for optimized kprobes Wang Nan
2015-02-12 12:19 ` [RFC PATCH v2 03/26] kprobes: x86: mark 2 bytes NOP as boostable Wang Nan
2015-02-12 12:19 ` [RFC PATCH v2 04/26] ftrace: don't update record flags if code modification fail Wang Nan
2015-02-12 12:19 ` [RFC PATCH v2 05/26] ftrace/x86: Ensure rec->flags no change when failure occures Wang Nan
2015-02-12 12:19 ` [RFC PATCH v2 06/26] ftrace: sort ftrace entries earlier Wang Nan
2015-02-12 17:35 ` Steven Rostedt
2015-02-12 12:19 ` [RFC PATCH v2 07/26] ftrace: allow search ftrace addr before ftrace fully inited Wang Nan
2015-02-12 17:38 ` Steven Rostedt
2015-02-12 12:19 ` [RFC PATCH v2 08/26] ftrace: enable other subsystems make ftrace nop before ftrace_init() Wang Nan
2015-02-12 17:39 ` Steven Rostedt
2015-02-13 1:29 ` Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 10/26] ftrace: x86: try to fix ftrace when ftrace_replace_code Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 11/26] early kprobes: introduce kprobe_is_early for futher early kprobe use Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 12/26] early kprobes: Add an KPROBE_FLAG_EARLY for early kprobe Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 13/26] early kprobes: ARM: directly modify code Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 14/26] early kprobes: ARM: introduce early kprobes related code area Wang Nan
2015-02-13 17:32 ` Russell King - ARM Linux
2015-02-15 8:26 ` [RFC PATCH 0/3] early kprobes: rearrange vmlinux.lds related code Wang Nan
2015-02-15 8:27 ` [RFC PATCH 1/3] early kprobes: ARM: add definition for vmlinux.lds use Wang Nan
2015-02-15 8:27 ` Wang Nan [this message]
2015-02-15 8:27 ` [RFC PATCH 3/3] early kprobes: introduce early kprobes related code area Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 15/26] early kprobes: x86: directly modify code Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 16/26] early kprobes: x86: introduce early kprobes related code area Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 17/26] early kprobes: introduces macros for allocing early kprobe resources Wang Nan
2015-02-12 12:20 ` [RFC PATCH v2 18/26] early kprobes: allows __alloc_insn_slot() from early kprobes slots Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 19/26] early kprobes: perhibit probing at early kprobe reserved area Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 20/26] early kprobes: core logic of eraly kprobes Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 21/26] early kprobes: add CONFIG_EARLY_KPROBES option Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 22/26] early kprobes: introduce arch_fix_ftrace_early_kprobe() Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 23/26] early kprobes: x86: arch_restore_optimized_kprobe() Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 24/26] early kprobes: core logic to support early kprobe on ftrace Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 25/26] early kprobes: introduce kconfig option " Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 26/26] kprobes: enable 'ekprobe=' cmdline option for early kprobes Wang Nan
2015-02-12 12:21 ` [RFC PATCH v2 09/26] ftrace: callchain and ftrace_bug_tryfix Wang Nan
2015-02-13 5:38 ` [RFC PATCH v3 00/26] Early kprobe: enable kprobes at very early booting stage Wang Nan
2015-02-13 17:15 ` Steven Rostedt
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