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[patch 4/4] Kprobes Cleanup arch_remove_kprobe
- From: Anil S Keshavamurthy <anil dot s dot keshavamurthy at intel dot com>
- To: ananth at in dot ibm dot com, akpm at osdl dot org, paulmck at us dot ibm dot com
- Cc: linux-kernel at vger dot kernel dot org, systemtap at sources dot redhat dot com, Anil S Keshavamurthy <anil dot s dot keshavamurthy at intel dot com>
- Date: Tue, 13 Dec 2005 12:35:51 -0800
- Subject: [patch 4/4] Kprobes Cleanup arch_remove_kprobe
- References: <20051213203547.649087523@csdlinux-2.jf.intel.com>
[PATCH] Kprobes Cleanup arch_remove_kprobe
Currently arch_remove_kprobes() is only implemented/required
for x86_64 and powerpc. All other architecture like
IA64, i386 and sparc64 implementes a dummy function which
is being called from arch independent kprobes.c file.
This patch removes the dummy functions and replaces it with
#define arch_remove_kprobe(p, s) do { } while(0)
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
-------------------------------------------------------------------------------
arch/i386/kernel/kprobes.c | 4 ----
arch/ia64/kernel/kprobes.c | 4 ----
arch/powerpc/kernel/kprobes.c | 4 +++-
arch/sparc64/kernel/kprobes.c | 4 ----
arch/x86_64/kernel/kprobes.c | 4 +++-
include/asm-i386/kprobes.h | 1 +
include/asm-ia64/kprobes.h | 1 +
include/asm-powerpc/kprobes.h | 1 +
include/asm-sparc64/kprobes.h | 1 +
include/asm-x86_64/kprobes.h | 1 +
include/linux/kprobes.h | 1 -
kernel/kprobes.c | 4 +---
12 files changed, 12 insertions(+), 18 deletions(-)
Index: linux-2.6.15-rc5-mm2/arch/i386/kernel/kprobes.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/i386/kernel/kprobes.c
+++ linux-2.6.15-rc5-mm2/arch/i386/kernel/kprobes.c
@@ -77,10 +77,6 @@ void __kprobes arch_disarm_kprobe(struct
(unsigned long) p->addr + sizeof(kprobe_opcode_t));
}
-void __kprobes arch_remove_kprobe(struct kprobe *p)
-{
-}
-
static inline void save_previous_kprobe(struct kprobe_ctlblk *kcb)
{
kcb->prev_kprobe.kp = kprobe_running();
Index: linux-2.6.15-rc5-mm2/arch/ia64/kernel/kprobes.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/ia64/kernel/kprobes.c
+++ linux-2.6.15-rc5-mm2/arch/ia64/kernel/kprobes.c
@@ -467,10 +467,6 @@ void __kprobes arch_disarm_kprobe(struct
flush_icache_range(arm_addr, arm_addr + sizeof(bundle_t));
}
-void __kprobes arch_remove_kprobe(struct kprobe *p)
-{
-}
-
/*
* We are resuming execution after a single step fault, so the pt_regs
* structure reflects the register state after we executed the instruction
Index: linux-2.6.15-rc5-mm2/arch/powerpc/kernel/kprobes.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/powerpc/kernel/kprobes.c
+++ linux-2.6.15-rc5-mm2/arch/powerpc/kernel/kprobes.c
@@ -83,9 +83,11 @@ void __kprobes arch_disarm_kprobe(struct
(unsigned long) p->addr + sizeof(kprobe_opcode_t));
}
-void __kprobes arch_remove_kprobe(struct kprobe *p)
+void __kprobes arch_remove_kprobe(struct kprobe *p, struct semaphore *s)
{
+ down(s);
free_insn_slot(p->ainsn.insn);
+ up(s);
}
static inline void prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
Index: linux-2.6.15-rc5-mm2/arch/sparc64/kernel/kprobes.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/sparc64/kernel/kprobes.c
+++ linux-2.6.15-rc5-mm2/arch/sparc64/kernel/kprobes.c
@@ -61,10 +61,6 @@ void __kprobes arch_disarm_kprobe(struct
flushi(p->addr);
}
-void __kprobes arch_remove_kprobe(struct kprobe *p)
-{
-}
-
static inline void save_previous_kprobe(struct kprobe_ctlblk *kcb)
{
kcb->prev_kprobe.kp = kprobe_running();
Index: linux-2.6.15-rc5-mm2/arch/x86_64/kernel/kprobes.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/arch/x86_64/kernel/kprobes.c
+++ linux-2.6.15-rc5-mm2/arch/x86_64/kernel/kprobes.c
@@ -220,9 +220,11 @@ void __kprobes arch_disarm_kprobe(struct
(unsigned long) p->addr + sizeof(kprobe_opcode_t));
}
-void __kprobes arch_remove_kprobe(struct kprobe *p)
+void __kprobes arch_remove_kprobe(struct kprobe *p, struct semaphore *s)
{
+ down(s);
free_insn_slot(p->ainsn.insn);
+ up(s);
}
static inline void save_previous_kprobe(struct kprobe_ctlblk *kcb)
Index: linux-2.6.15-rc5-mm2/include/asm-i386/kprobes.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/asm-i386/kprobes.h
+++ linux-2.6.15-rc5-mm2/include/asm-i386/kprobes.h
@@ -40,6 +40,7 @@ typedef u8 kprobe_opcode_t;
#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry
#define ARCH_SUPPORTS_KRETPROBES
+#define arch_remove_kprobe(p, s) do { } while(0)
void kretprobe_trampoline(void);
Index: linux-2.6.15-rc5-mm2/include/asm-ia64/kprobes.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/asm-ia64/kprobes.h
+++ linux-2.6.15-rc5-mm2/include/asm-ia64/kprobes.h
@@ -89,6 +89,7 @@ struct kprobe_ctlblk {
#define IP_RELATIVE_PREDICT_OPCODE (7)
#define LONG_BRANCH_OPCODE (0xC)
#define LONG_CALL_OPCODE (0xD)
+#define arch_remove_kprobe(p, s) do { } while(0)
typedef struct kprobe_opcode {
bundle_t bundle;
Index: linux-2.6.15-rc5-mm2/include/asm-powerpc/kprobes.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/asm-powerpc/kprobes.h
+++ linux-2.6.15-rc5-mm2/include/asm-powerpc/kprobes.h
@@ -49,6 +49,7 @@ typedef unsigned int kprobe_opcode_t;
#define ARCH_SUPPORTS_KRETPROBES
void kretprobe_trampoline(void);
+extern void arch_remove_kprobe(struct kprobe *p, struct semaphore *s);
/* Architecture specific copy of original instruction */
struct arch_specific_insn {
Index: linux-2.6.15-rc5-mm2/include/asm-sparc64/kprobes.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/asm-sparc64/kprobes.h
+++ linux-2.6.15-rc5-mm2/include/asm-sparc64/kprobes.h
@@ -12,6 +12,7 @@ typedef u32 kprobe_opcode_t;
#define MAX_INSN_SIZE 2
#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry
+#define arch_remove_kprobe(p, s) do { } while(0)
/* Architecture specific copy of original instruction*/
struct arch_specific_insn {
Index: linux-2.6.15-rc5-mm2/include/asm-x86_64/kprobes.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/asm-x86_64/kprobes.h
+++ linux-2.6.15-rc5-mm2/include/asm-x86_64/kprobes.h
@@ -78,6 +78,7 @@ static inline void restore_interrupts(st
local_irq_enable();
}
+extern void arch_remove_kprobe(struct kprobe *p, struct semaphore *s);
extern int post_kprobe_handler(struct pt_regs *regs);
extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
extern int kprobe_handler(struct pt_regs *regs);
Index: linux-2.6.15-rc5-mm2/include/linux/kprobes.h
===================================================================
--- linux-2.6.15-rc5-mm2.orig/include/linux/kprobes.h
+++ linux-2.6.15-rc5-mm2/include/linux/kprobes.h
@@ -152,7 +152,6 @@ extern spinlock_t kretprobe_lock;
extern int arch_prepare_kprobe(struct kprobe *p);
extern void arch_arm_kprobe(struct kprobe *p);
extern void arch_disarm_kprobe(struct kprobe *p);
-extern void arch_remove_kprobe(struct kprobe *p);
extern int arch_init_kprobes(void);
extern void show_registers(struct pt_regs *regs);
extern kprobe_opcode_t *get_insn_slot(void);
Index: linux-2.6.15-rc5-mm2/kernel/kprobes.c
===================================================================
--- linux-2.6.15-rc5-mm2.orig/kernel/kprobes.c
+++ linux-2.6.15-rc5-mm2/kernel/kprobes.c
@@ -528,9 +528,7 @@ void __kprobes unregister_kprobe(struct
list_del_rcu(&p->list);
kfree(old_p);
}
- down(&kprobe_mutex);
- arch_remove_kprobe(p);
- up(&kprobe_mutex);
+ arch_remove_kprobe(p, &kprobe_mutex);
}
}
--