linux-kernel - [PATCH 3/3] kernel/module.c: Update debug alignment after symtable generation

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Message-Id: <1424902497-32141-4-git-send-email-lauraa@codeaurora.org>
Date:	Wed, 25 Feb 2015 14:14:57 -0800
From:	Laura Abbott <lauraa@...eaurora.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Laura Abbott <lauraa@...eaurora.org>,
	Will Deacon <will.deacon@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Kees Cook <keescook@...omium.org>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] kernel/module.c: Update debug alignment after symtable generation


When CONFIG_DEBUG_SET_MODULE_RONX is enabled, the sizes of
module sections are aligned up so appropriate permissions can
be applied. Adjusting for the symbol table may cause them to
become unaligned. Make sure to re-align the sizes afterward.

Signed-off-by: Laura Abbott <lauraa@...eaurora.org>
---
 kernel/module.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index b34813f..cc93cf6 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2313,11 +2313,13 @@ static void layout_symtab(struct module *mod, struct load_info *info)
 	info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1);
 	info->stroffs = mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym);
 	mod->core_size += strtab_size;
+	mod->core_size = debug_align(mod->core_size);
 
 	/* Put string table section at end of init part of module. */
 	strsect->sh_flags |= SHF_ALLOC;
 	strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect,
 					 info->index.str) | INIT_OFFSET_MASK;
+	mod->init_size = debug_align(mod->init_size);
 	pr_debug("\t%s\n", info->secstrings + strsect->sh_name);
 }
 
-- 
Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project

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