From mboxrd@z Thu Jan 1 00:00:00 1970 From: tom.leiming@gmail.com (Ming Lei) Date: Wed, 23 Oct 2013 11:18:40 +0800 Subject: [RFC PATCH] kernel/kallsyms.c: only show legal kernel symbol Message-ID: <1382498320-26594-1-git-send-email-tom.leiming@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Address of non-module kernel symbol should always be located from CONFIG_PAGE_OFFSET on, so only show these legal kernel symbols in /proc/kallsyms. On ARM, some symbols(see below) may drop in relocatable code, so perf can't parse kernel symbols any more from /proc/kallsyms, this patch fixes the problem. 00000000 t __vectors_start 00000020 A cpu_v7_suspend_size 00001000 t __stubs_start 00001004 t vector_rst 00001020 t vector_irq 000010a0 t vector_dabt 00001120 t vector_pabt 000011a0 t vector_und 00001220 t vector_addrexcptn 00001224 t vector_fiq 00001224 T vector_fiq_offset The issue can be fixed in scripts/kallsyms.c too, but looks this approach is easier. Cc: Russell King Cc: linux-arm-kernel at lists.infradead.org Cc: Rusty Russell Cc: Chen Gang Signed-off-by: Ming Lei --- kernel/kallsyms.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index 3127ad5..184f271 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -543,7 +543,7 @@ static int s_show(struct seq_file *m, void *p) tolower(iter->type); seq_printf(m, "%pK %c %s\t[%s]\n", (void *)iter->value, type, iter->name, iter->module_name); - } else + } else if (iter->value >= CONFIG_PAGE_OFFSET) seq_printf(m, "%pK %c %s\n", (void *)iter->value, iter->type, iter->name); return 0; -- 1.7.9.5