From: wangnan0@huawei.com (Wang Nan)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 3/3] early kprobes: introduce early kprobes related code area.
Date: Sun, 15 Feb 2015 16:27:13 +0800 [thread overview]
Message-ID: <1423988833-7301-1-git-send-email-wangnan0@huawei.com> (raw)
In-Reply-To: <1423988798-7104-1-git-send-email-wangnan0@huawei.com>
Append early kprobe related slots to KPROBES_TEXT. This is arch
independent part. Arch code should define MAX_OPTINSN_SIZE,
KPROBE_OPCODE_SIZE and MAX_INSN_SIZE for it.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
---
include/asm-generic/vmlinux.lds.h | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index ac78910..7cd1d21 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -424,11 +424,28 @@
*(.spinlock.text) \
VMLINUX_SYMBOL(__lock_text_end) = .;
+#ifndef CONFIG_EARLY_KPROBES
+# define EARLY_KPROBES_TEXT
+#else
+# define EARLY_KPROBES_TEXT \
+ . = ALIGN(8); \
+ VMLINUX_SYMBOL(__early_kprobes_start) = .; \
+ VMLINUX_SYMBOL(__early_kprobes_code_area_start) = .; \
+ . = . + MAX_OPTINSN_SIZE * CONFIG_NR_EARLY_KPROBES_SLOTS; \
+ VMLINUX_SYMBOL(__early_kprobes_code_area_end) = .; \
+ . = ALIGN(8); \
+ VMLINUX_SYMBOL(__early_kprobes_insn_slot_start) = .; \
+ . = . + MAX_INSN_SIZE * KPROBE_OPCODE_SIZE * CONFIG_NR_EARLY_KPROBES_SLOTS;\
+ VMLINUX_SYMBOL(__early_kprobes_insn_slot_end) = .; \
+ VMLINUX_SYMBOL(__early_kprobes_end) = .;
+#endif
+
#define KPROBES_TEXT \
ALIGN_FUNCTION(); \
VMLINUX_SYMBOL(__kprobes_text_start) = .; \
*(.kprobes.text) \
- VMLINUX_SYMBOL(__kprobes_text_end) = .;
+ VMLINUX_SYMBOL(__kprobes_text_end) = .; \
+ EARLY_KPROBES_TEXT
#define ENTRY_TEXT \
ALIGN_FUNCTION(); \
--
1.8.4
next prev parent reply other threads:[~2015-02-15 8:27 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 ` [RFC PATCH 2/3] early kprobes: x86: " Wang Nan
2015-02-15 8:27 ` Wang Nan [this message]
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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