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Date: Tue, 24 Feb 2009 19:21:54 -0500 From: Tim Abbott <tabbott@....EDU> To: linux-kernel@...r.kernel.org Cc: Tim Abbott <tabbott@....edu>, Anders Kaseorg <andersk@....edu>, Jeff Arnold <jbarnold@....edu>, Waseem Daher <wdaher@....edu>, Denys Vlasenko <vda.linux@...glemail.com>, Nikanth Karthikesan <knikanth@...e.de>, Rusty Russell <rusty@...tcorp.com.au>, Andi Kleen <andi@...stfloor.org> Subject: [PATCH v2 3/4] Ksplice: Export symbols needed for Ksplice Ksplice uses __module_address and __module_text_address to determine which module contains various addresses. Ksplice uses __kernel_text_address to limit its check for trampolines (jump instructions inserted by Ksplice) to only text addresses. Ksplice uses task_curr in order to confirm that no other tasks are executing during Ksplice's kernel stack check. Ksplice uses find_bug and search_exception_tables as part of its conservative check that the user provided the correct source code for the running kernel. Signed-off-by: Tim Abbott <tabbott@....edu> --- kernel/extable.c | 3 +++ kernel/module.c | 2 ++ kernel/sched.c | 1 + lib/bug.c | 1 + 4 files changed, 7 insertions(+), 0 deletions(-) diff --git a/kernel/extable.c b/kernel/extable.c index 384f0da..ce08fe8 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -40,6 +40,7 @@ const struct exception_table_entry *search_exception_tables(unsigned long addr) e = search_module_extables(addr); return e; } +EXPORT_SYMBOL_GPL(search_exception_tables); __notrace_funcgraph int core_kernel_text(unsigned long addr) { @@ -60,6 +61,7 @@ __notrace_funcgraph int __kernel_text_address(unsigned long addr) return 1; return is_module_text_address(addr); } +EXPORT_SYMBOL_GPL(__kernel_text_address); int kernel_text_address(unsigned long addr) { @@ -83,3 +85,4 @@ int func_ptr_is_kernel_text(void *ptr) return 1; return is_module_text_address(addr); } +EXPORT_SYMBOL_GPL(kernel_text_address); diff --git a/kernel/module.c b/kernel/module.c index 77fbf38..b3135db 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2760,6 +2760,7 @@ __notrace_funcgraph struct module *__module_address(unsigned long addr) return mod; return NULL; } +EXPORT_SYMBOL_GPL(__module_address); /* * is_module_text_address - is this address inside module code? @@ -2798,6 +2799,7 @@ struct module *__module_text_address(unsigned long addr) } return mod; } +EXPORT_SYMBOL_GPL(__module_text_address); /* Don't grab lock, we're oopsing. */ void print_modules(void) diff --git a/kernel/sched.c b/kernel/sched.c index c1d0ed3..a35f940 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1801,6 +1801,7 @@ inline int task_curr(const struct task_struct *p) { return cpu_curr(task_cpu(p)) == p; } +EXPORT_SYMBOL_GPL(task_curr); static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu) { diff --git a/lib/bug.c b/lib/bug.c index 300e41a..c8491f9 100644 --- a/lib/bug.c +++ b/lib/bug.c @@ -124,6 +124,7 @@ const struct bug_entry *find_bug(unsigned long bugaddr) return module_find_bug(bugaddr); } +EXPORT_SYMBOL_GPL(find_bug); enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs) { -- 1.6.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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