lkml.org 
[lkml]   [2011]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH v2 2.6.38-rc8-tip 9/20] 9: x86: architecture specific task information.

On X86_64, we need to support rip relative instructions.
Rip relative instructions are handled by saving the scratch register
on probe hit and then retrieving the previously saved scratch register
after single-step. This value stored at probe hit is specific to each
task. Hence this is implemented as part of uprobe_task_arch_info.

Since x86_32 has no support for rip relative instructions, we dont need to
bother for x86_32.

Signed-off-by: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
arch/x86/include/asm/uprobes.h | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/uprobes.h b/arch/x86/include/asm/uprobes.h
index 0063207..e38950f 100644
--- a/arch/x86/include/asm/uprobes.h
+++ b/arch/x86/include/asm/uprobes.h
@@ -34,8 +34,13 @@ typedef u8 uprobe_opcode_t;
struct uprobe_arch_info {
unsigned long rip_rela_target_address;
};
+
+struct uprobe_task_arch_info {
+ unsigned long saved_scratch_register;
+};
#else
struct uprobe_arch_info {};
+struct uprobe_task_arch_info {};
#endif
struct uprobe;
extern int analyze_insn(struct task_struct *tsk, struct uprobe *uprobe);

\
 
 \ /
  Last update: 2011-03-14 14:43    [W:0.319 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site