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Kprobes: indicate kretprobe support in Kconfig

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Add CONFIG_HAVE_KRETPROBES to the arch/<arch>/Kconfig file for relevant
architectures with kprobes support.  This facilitates easy handling of
in-kernel modules (like samples/kprobes/kretprobe_example.c) that depend on
kretprobes being present in the kernel.

Thanks to Sam Ravnborg for helping make the patch more lean.

Per Mathieu's suggestion, added CONFIG_KRETPROBES and fixed up dependencies.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ananth N Mavinakayanahalli
2008-03-04 14:28:37 -08:00
committed by Linus Torvalds
parent 8182ec49a7
commit 9edddaa200
15 changed files with 19 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/asm-arm/kprobes.h
-1
View File
@@ -20,7 +20,6 @@
#include <linux/ptrace.h>
#include <linux/percpu.h>
#define ARCH_SUPPORTS_KRETPROBES
#define __ARCH_WANT_KPROBES_INSN_SLOT
#define MAX_INSN_SIZE 2
#define MAX_STACK_SIZE 64 /* 32 would probably be OK */
include/asm-ia64/kprobes.h
-1
View File
@@ -82,7 +82,6 @@ struct kprobe_ctlblk {
struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
};
#define ARCH_SUPPORTS_KRETPROBES
#define kretprobe_blacklist_size 0
#define SLOT0_OPCODE_SHIFT (37)
include/asm-powerpc/kprobes.h
-1
View File
@@ -80,7 +80,6 @@ typedef unsigned int kprobe_opcode_t;
#define is_trap(instr) (IS_TW(instr) || IS_TWI(instr))
#endif
#define ARCH_SUPPORTS_KRETPROBES
#define flush_insn_slot(p) do { } while (0)
#define kretprobe_blacklist_size 0
include/asm-s390/kprobes.h
-1
View File
@@ -46,7 +46,6 @@ typedef u16 kprobe_opcode_t;
? (MAX_STACK_SIZE) \
: (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
#define ARCH_SUPPORTS_KRETPROBES
#define kretprobe_blacklist_size 0
#define KPROBE_SWAP_INST 0x10
include/asm-sparc64/kprobes.h
-2
View File
@@ -14,8 +14,6 @@ typedef u32 kprobe_opcode_t;
#define arch_remove_kprobe(p) do {} while (0)
#define ARCH_SUPPORTS_KRETPROBES
#define flush_insn_slot(p) \
do { flushi(&(p)->ainsn.insn[0]); \
flushi(&(p)->ainsn.insn[1]); \
include/asm-x86/kprobes.h
-1
View File
@@ -42,7 +42,6 @@ typedef u8 kprobe_opcode_t;
: (((unsigned long)current_thread_info()) + THREAD_SIZE \
- (unsigned long)(ADDR)))
#define ARCH_SUPPORTS_KRETPROBES
#define flush_insn_slot(p) do { } while (0)
extern const int kretprobe_blacklist_size;
include/linux/kprobes.h
+3 -3
View File
@@ -125,11 +125,11 @@ struct jprobe {
DECLARE_PER_CPU(struct kprobe *, current_kprobe);
DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
#ifdef ARCH_SUPPORTS_KRETPROBES
#ifdef CONFIG_KRETPROBES
extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
struct pt_regs *regs);
extern int arch_trampoline_kprobe(struct kprobe *p);
#else /* ARCH_SUPPORTS_KRETPROBES */
#else /* CONFIG_KRETPROBES */
static inline void arch_prepare_kretprobe(struct kretprobe *rp,
struct pt_regs *regs)
{
@@ -138,7 +138,7 @@ static inline int arch_trampoline_kprobe(struct kprobe *p)
{
return 0;
}
#endif /* ARCH_SUPPORTS_KRETPROBES */
#endif /* CONFIG_KRETPROBES */
/*
* Function-return probe -
* Note: