| From | Srikar Dronamraju <> | Date | Mon, 14 Mar 2011 19:05:50 +0530 | Subject | [PATCH v2 2.6.38-rc8-tip 9/20] 9: x86: architecture specific task information. |
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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);
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