linux-kernel - Re: [PATCH 4/6] kbuild: Support padding in kallsyms tables

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Message-ID: <20140208174645.GH12219@tassilo.jf.intel.com>
Date:	Sat, 8 Feb 2014 09:46:45 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:	mmarek@...e.cz, linux-kernel@...r.kernel.org,
	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 4/6] kbuild: Support padding in kallsyms tables

> With attached config I get:
> 
>   KSYM    .tmp_kallsyms2.o
> kallsyms: address pointers padding too short: 24495 missing
>   OBJCOPY .tmp_kallsyms2.bin
>   PATCHFILE vmlinux
> Not enough padding in vmlinux for new kallsyms, missing 192120
> Makefile:840: recipe for target 'vmlinux' failed

Nice test case thanks.  This should fix it.

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index e479076..fb6898f 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -197,15 +197,19 @@ static int symbol_valid_tr(struct sym_entry *s)
 {
 	size_t i;
 	struct text_range *tr;
+	int valid = 0;
 
 	for (i = 0; i < ARRAY_SIZE(text_ranges); ++i) {
 		tr = &text_ranges[i];
 
+		if (tr->start && tr->end)
+		    valid++;
+
 		if (s->addr >= tr->start && s->addr <= tr->end)
 			return 1;
 	}
 
-	return 0;
+	return valid ? 0 : 1;
 }
 
 static int symbol_valid(struct sym_entry *s)
--
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