From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Linux-mm <linux-mm@kvack.org>,
Arnaldo Carvalho de Melo <acme@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>,
Christoph Hellwig <hch@infradead.org>,
Jonathan Corbet <corbet@lwn.net>,
Thomas Gleixner <tglx@linutronix.de>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Oleg Nesterov <oleg@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
SystemTap <systemtap@sources.redhat.com>,
Jim Keniston <jkenisto@linux.vnet.ibm.com>,
Roland McGrath <roland@hack.frob.com>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH v3 2.6.39-rc1-tip 13/26] 13: uprobes: get the breakpoint address.
Date: Fri, 01 Apr 2011 14:44:00 -0000 [thread overview]
Message-ID: <20110401143507.15455.87968.sendpatchset@localhost6.localdomain6> (raw)
In-Reply-To: <20110401143223.15455.19844.sendpatchset@localhost6.localdomain6>
On a breakpoint hit, return the address where the breakpoint was hit.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
---
include/linux/uprobes.h | 5 +++++
kernel/uprobes.c | 11 +++++++++++
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index 10647be..91b808a 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -157,6 +157,7 @@ extern void uprobe_free_utask(struct task_struct *tsk);
struct vm_area_struct;
extern int uprobe_mmap(struct vm_area_struct *vma);
+extern unsigned long uprobes_get_bkpt_addr(struct pt_regs *regs);
extern void uprobe_dup_mmap(struct mm_struct *old_mm, struct mm_struct *mm);
extern void uprobes_free_xol_area(struct mm_struct *mm);
#else /* CONFIG_UPROBES is not defined */
@@ -179,5 +180,9 @@ static inline int uprobe_mmap(struct vm_area_struct *vma)
}
static inline void uprobe_free_utask(struct task_struct *tsk) {}
static inline void uprobes_free_xol_area(struct mm_struct *mm) {}
+static inline unsigned long uprobes_get_bkpt_addr(struct pt_regs *regs)
+{
+ return 0;
+}
#endif /* CONFIG_UPROBES */
#endif /* _LINUX_UPROBES_H */
diff --git a/kernel/uprobes.c b/kernel/uprobes.c
index 7663d18..dcae6dd 100644
--- a/kernel/uprobes.c
+++ b/kernel/uprobes.c
@@ -1190,6 +1190,17 @@ static void xol_free_insn_slot(struct task_struct *tsk, unsigned long slot_addr)
__func__, slot_addr);
}
+/**
+ * uprobes_get_bkpt_addr - compute address of bkpt given post-bkpt regs
+ * @regs: Reflects the saved state of the task after it has hit a breakpoint
+ * instruction.
+ * Return the address of the breakpoint instruction.
+ */
+unsigned long uprobes_get_bkpt_addr(struct pt_regs *regs)
+{
+ return instruction_pointer(regs) - UPROBES_BKPT_INSN_SIZE;
+}
+
/*
* Called with no locks held.
* Called in context of a exiting or a exec-ing thread.
next prev parent reply other threads:[~2011-04-01 14:44 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-01 14:42 [PATCH v3 2.6.39-rc1-tip 0/26] 0: Uprobes patchset with perf probe support Srikar Dronamraju
2011-04-01 14:42 ` [PATCH v3 2.6.39-rc1-tip 3/26] 3: X86 specific breakpoint definitions Srikar Dronamraju
2011-04-01 14:42 ` [PATCH v3 2.6.39-rc1-tip 2/26] 2: mm: Move replace_page() to mm/memory.c Srikar Dronamraju
2011-04-01 14:42 ` [PATCH v3 2.6.39-rc1-tip 1/26] 1: mm: replace_page() loses static attribute Srikar Dronamraju
2011-04-01 14:43 ` [PATCH v3 2.6.39-rc1-tip 5/26] 5: uprobes: Adding and remove a uprobe in a rb tree Srikar Dronamraju
2011-04-18 12:21 ` Peter Zijlstra
2011-04-01 14:43 ` [PATCH v3 2.6.39-rc1-tip 4/26] 4: uprobes: Breakground page replacement Srikar Dronamraju
2011-04-18 12:21 ` Peter Zijlstra
2011-04-01 14:43 ` [PATCH v3 2.6.39-rc1-tip 7/26] 7: x86: analyze instruction and determine fixups Srikar Dronamraju
2011-04-19 13:29 ` Steven Rostedt
2011-04-21 17:46 ` Srikar Dronamraju
2011-04-21 17:50 ` Peter Zijlstra
2011-04-01 14:43 ` [PATCH v3 2.6.39-rc1-tip 6/26] 6: Uprobes: register/unregister probes Srikar Dronamraju
2011-04-02 0:27 ` Stephen Wilson
2011-04-02 1:03 ` Srikar Dronamraju
2011-04-02 1:29 ` Stephen Wilson
2011-04-18 12:21 ` Peter Zijlstra
2011-04-01 14:43 ` [PATCH v3 2.6.39-rc1-tip 8/26] 8: uprobes: store/restore original instruction Srikar Dronamraju
2011-04-18 16:13 ` Peter Zijlstra
2011-04-01 14:44 ` Srikar Dronamraju [this message]
2011-04-18 16:48 ` [PATCH v3 2.6.39-rc1-tip 13/26] 13: uprobes: get the breakpoint address Peter Zijlstra
2011-04-01 14:44 ` [PATCH v3 2.6.39-rc1-tip 12/26] 12: uprobes: slot allocation for uprobes Srikar Dronamraju
2011-04-18 16:47 ` Peter Zijlstra
2011-04-19 6:40 ` Srikar Dronamraju
[not found] ` <BANLkTimw7dV9_aSsrUfzwSdwr6UwZDsRwg@mail.gmail.com>
2011-04-20 14:52 ` Frank Ch. Eigler
2011-04-21 14:25 ` Srikar Dronamraju
[not found] ` <1303397133.1708.41.camel@unknown001a4b0c2895>
2011-04-21 17:48 ` Srikar Dronamraju
2011-04-01 14:44 ` [PATCH v3 2.6.39-rc1-tip 10/26] 10: x86: architecture specific task information Srikar Dronamraju
2011-04-01 14:44 ` [PATCH v3 2.6.39-rc1-tip 9/26] 9: uprobes: mmap and fork hooks Srikar Dronamraju
2011-04-18 16:22 ` Peter Zijlstra
2011-04-18 16:30 ` Peter Zijlstra
2011-04-19 6:59 ` Srikar Dronamraju
2011-04-01 14:44 ` [PATCH v3 2.6.39-rc1-tip 11/26] 11: uprobes: task specific information Srikar Dronamraju
2011-04-01 14:45 ` [PATCH v3 2.6.39-rc1-tip 16/26] 16: x86: uprobes exception notifier for x86 Srikar Dronamraju
2011-04-01 14:45 ` [PATCH v3 2.6.39-rc1-tip 15/26] 15: uprobes: Handing int3 and singlestep exception Srikar Dronamraju
2011-04-19 13:04 ` Peter Zijlstra
2011-04-19 13:12 ` Steven Rostedt
2011-04-21 17:25 ` Srikar Dronamraju
2011-04-21 17:39 ` Peter Zijlstra
2011-04-19 13:40 ` Peter Zijlstra
2011-04-21 17:18 ` Srikar Dronamraju
2011-04-01 14:45 ` [PATCH v3 2.6.39-rc1-tip 17/26] 17: uprobes: register a notifier for uprobes Srikar Dronamraju
2011-04-19 13:55 ` Peter Zijlstra
2011-04-01 14:45 ` [PATCH v3 2.6.39-rc1-tip 14/26] 14: x86: x86 specific probe handling Srikar Dronamraju
2011-04-18 16:55 ` Peter Zijlstra
2011-04-19 5:57 ` Srikar Dronamraju
2011-04-18 16:59 ` Peter Zijlstra
2011-04-01 14:45 ` [PATCH v3 2.6.39-rc1-tip 18/26] 18: uprobes: commonly used filters Srikar Dronamraju
2011-04-05 1:27 ` Masami Hiramatsu
2011-04-19 13:58 ` Peter Zijlstra
2011-04-21 11:24 ` Srikar Dronamraju
2011-04-21 11:35 ` Peter Zijlstra
2011-04-21 12:04 ` Srikar Dronamraju
2011-04-01 14:46 ` [PATCH v3 2.6.39-rc1-tip 19/26] 19: tracing: Extract out common code for kprobes/uprobes traceevents Srikar Dronamraju
2011-04-01 14:46 ` [PATCH v3 2.6.39-rc1-tip 22/26] 22: perf: rename target_module to target Srikar Dronamraju
2011-04-04 10:06 ` Masami Hiramatsu
2011-04-06 23:46 ` Srikar Dronamraju
2011-04-01 14:46 ` [PATCH v3 2.6.39-rc1-tip 23/26] 23: perf: show possible probes in a given executable file or library Srikar Dronamraju
2011-04-04 10:16 ` Masami Hiramatsu
2011-04-06 22:50 ` Srikar Dronamraju
2011-04-01 14:46 ` [PATCH v3 2.6.39-rc1-tip 21/26] 21: Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Srikar Dronamraju
2011-04-01 14:57 ` [RESEND] [PATCH v3 2.6.39-rc1-tip 21/26] 21: Uprobe tracer documentation " Srikar Dronamraju
2011-04-01 14:46 ` [PATCH v3 2.6.39-rc1-tip 20/26] 20: tracing: uprobes trace_event interface Srikar Dronamraju
2011-04-01 14:47 ` [PATCH v3 2.6.39-rc1-tip 24/26] 24: perf: perf interface for uprobes Srikar Dronamraju
2011-04-01 14:47 ` [PATCH v3 2.6.39-rc1-tip 25/26] 25: perf: Documentation for perf uprobes Srikar Dronamraju
2011-04-01 14:47 ` [PATCH v3 2.6.39-rc1-tip 26/26] 26: uprobes: filter chain Srikar Dronamraju
2011-04-05 1:27 ` Masami Hiramatsu
2011-04-06 22:42 ` Srikar Dronamraju
2011-04-07 3:19 ` Masami Hiramatsu
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