linux-kernel - [PATCH] exclude h8300 local symbols (Re: kallsyms exclude local symbols)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 07 Aug 2008 19:36:18 -0400
From:	Yoshinori Sato <ysato@...rs.sourceforge.jp>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Paulo Marques <pmarques@...popie.com>
Cc:	lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] exclude h8300 local symbols (Re: kallsyms exclude local symbols)

At Thu, 07 Aug 2008 13:00:05 +0100,
Paulo Marques wrote:
> 
> Yoshinori Sato wrote:
> > h8300's nm output include '.Lfoo' local symbols.
> > [...]
> >  	/* exclude also MIPS ELF local symbols ($L123 instead of .L123) */
> > -	else if (str[0] == '$')
> > +	else if (str[0] == '$' || str[0] == '.')
> 
> The comment above needs some updating too. Something along these lines:
> 
> /* exclude also MIPS ELF local symbols (eg. $L123) and h8300 (eg .LM10) */
> 
> Other than that, the patch seems fine.
> 
> -- 
> Paulo Marques - www.grupopie.com
> 
> "...so she told me it was either her or the ham radio, over."

Thanks reply.

Update comment.
And same problem in modpost.

Warning message dirty.
WARNING: vmlinux.o(.text+0x304b): Section mismatch in reference from the variable .LM10 to the variable .init.text:_free_area_init
The function .LM10() references
the variable __init _free_area_init.
This is often because .LM10 lacks a __init
annotation or the annotation of _free_area_init is wrong.

fix it.
WARNING: vmlinux.o(.text+0x304b): Section mismatch in reference from the variable _paging_init to the variable .init.text:___alloc_bootmem
The function _paging_init() references
the variable __init ___alloc_bootmem.
This is often because _paging_init lacks a __init
annotation or the annotation of ___alloc_bootmem is wrong.

Signed-off-by: Yoshinori Sato <ysato@...rs.sourceforge.jp>

---
 scripts/kallsyms.c    |    5 +++--
 scripts/mod/modpost.c |    4 +++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index ad2434b..64ad9cf 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -105,8 +105,9 @@ static int read_symbol(FILE *in, struct sym_entry *s)
 	else if (toupper(stype) == 'U' ||
 		 is_arm_mapping_symbol(sym))
 		return -1;
-	/* exclude also MIPS ELF local symbols ($L123 instead of .L123) */
-	else if (str[0] == '$')
+	/* exclude also MIPS ELF (e.g. $L123) and h8300 elf (e.g. .LM123)
+	   local symbols */
+ 	else if (str[0] == '$' || str[0] == '.')
 		return -1;
 	/* exclude debugging symbols */
 	else if (stype == 'N')
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 418cd7d..e07f4ba 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1042,7 +1042,9 @@ static inline int is_valid_name(struct elf_info *elf, Elf_Sym *sym)
 {
 	const char *name = elf->strtab + sym->st_name;
 
-	if (!name || !strlen(name))
+	if (!name || !strlen(name) ||
+	/* exclude h8300 elf local symbols (e.g. .LM123) */
+	    name[0] == '.')
 		return 0;
 	return !is_arm_mapping_symbol(name);
 }
-- 
1.5.6.3

-- 
Yoshinori Sato
<ysato@...rs.sourceforge.jp>
--
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/