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authorDouglas Anderson <dianders@chromium.org>2013-08-29 00:08:01 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-02-05 22:35:38 -0800
commit30e2adb098750046be48eb595a7c6732a4293d54 (patch)
treed808544e6e57f1b871ab0e3aa8d6d4be8e08bc1b
parent6f80113d0c1a347bef06481a56b6d9c5bb90622f (diff)
downloadlinux-linaro-stable-30e2adb098750046be48eb595a7c6732a4293d54.tar.gz
ARM: 7829/1: Add ".text.unlikely" and ".text.hot" to arm unwind tables
commit 849b882b52df0f276d9ffded01d85654aa0da422 upstream. It appears that gcc may put some code in ".text.unlikely" or ".text.hot" sections. Right now those aren't accounted for in unwind tables. Add them. I found some docs about this at: http://gcc.gnu.org/onlinedocs/gcc-4.6.2/gcc.pdf Without this, if you have slub_debug turned on, you can get messages that look like this: unwind: Index not found 7f008c50 Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> [wangkai: backport to 3.10 - adjust context ] Signed-off-by: Wang Kai <morgan.wang@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/arm/include/asm/module.h2
-rw-r--r--arch/arm/kernel/module.c8
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/include/asm/module.h b/arch/arm/include/asm/module.h
index 0d3a28dbc8e5..ed690c49ef93 100644
--- a/arch/arm/include/asm/module.h
+++ b/arch/arm/include/asm/module.h
@@ -12,6 +12,8 @@ enum {
ARM_SEC_CORE,
ARM_SEC_EXIT,
ARM_SEC_DEVEXIT,
+ ARM_SEC_HOT,
+ ARM_SEC_UNLIKELY,
ARM_SEC_MAX,
};
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 1e9be5d25e56..af60478f54d0 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -296,6 +296,10 @@ int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
maps[ARM_SEC_EXIT].unw_sec = s;
else if (strcmp(".ARM.exidx.devexit.text", secname) == 0)
maps[ARM_SEC_DEVEXIT].unw_sec = s;
+ else if (strcmp(".ARM.exidx.text.unlikely", secname) == 0)
+ maps[ARM_SEC_UNLIKELY].unw_sec = s;
+ else if (strcmp(".ARM.exidx.text.hot", secname) == 0)
+ maps[ARM_SEC_HOT].unw_sec = s;
else if (strcmp(".init.text", secname) == 0)
maps[ARM_SEC_INIT].txt_sec = s;
else if (strcmp(".devinit.text", secname) == 0)
@@ -306,6 +310,10 @@ int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
maps[ARM_SEC_EXIT].txt_sec = s;
else if (strcmp(".devexit.text", secname) == 0)
maps[ARM_SEC_DEVEXIT].txt_sec = s;
+ else if (strcmp(".text.unlikely", secname) == 0)
+ maps[ARM_SEC_UNLIKELY].txt_sec = s;
+ else if (strcmp(".text.hot", secname) == 0)
+ maps[ARM_SEC_HOT].txt_sec = s;
}
for (i = 0; i < ARM_SEC_MAX; i++)