[PATCH v5 3.1.0-rc4-tip 10/26] x86: Set instruction pointer.
From: Srikar Dronamraju <hidden>
Date: 2011-09-20 12:15:34
Also in:
lkml
Subsystem:
the rest, uprobes, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Masami Hiramatsu, Oleg Nesterov, Peter Zijlstra, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Provides x86 specific routine to set the instruction pointer to the given address. Signed-off-by: Jim Keniston <redacted> Signed-off-by: Srikar Dronamraju <redacted> --- arch/x86/include/asm/uprobes.h | 1 + arch/x86/kernel/uprobes.c | 10 ++++++++++ 2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/uprobes.h b/arch/x86/include/asm/uprobes.h
index 4295ce0..35ac9d7 100644
--- a/arch/x86/include/asm/uprobes.h
+++ b/arch/x86/include/asm/uprobes.h@@ -39,4 +39,5 @@ struct uprobe_arch_info {}; #endif struct uprobe; extern int analyze_insn(struct task_struct *tsk, struct uprobe *uprobe); +extern void set_instruction_pointer(struct pt_regs *regs, unsigned long vaddr); #endif /* _ASM_UPROBES_H */
diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c
index e4fd077..e1c1dfe 100644
--- a/arch/x86/kernel/uprobes.c
+++ b/arch/x86/kernel/uprobes.c@@ -383,3 +383,13 @@ int analyze_insn(struct task_struct *tsk, struct uprobe *uprobe) prepare_fixups(uprobe, &insn); return 0; } + +/* + * @reg: reflects the saved state of the task + * @vaddr: the virtual address to jump to. + * Return 0 on success or a -ve number on error. + */ +void set_instruction_pointer(struct pt_regs *regs, unsigned long vaddr) +{ + regs->ip = vaddr; +} --
To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>