diff options
| author | Douglas Anderson <dianders@chromium.org> | 2013-08-29 00:08:01 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-09-02 13:49:47 +0100 |
| commit | 849b882b52df0f276d9ffded01d85654aa0da422 (patch) | |
| tree | 67714bc2487f389a78a6938d5773f13b59072f38 /arch/arm | |
| parent | 6a7d2c625656df5f8ad6e33aa3d164eefb1df8dc (diff) | |
ARM: 7829/1: Add ".text.unlikely" and ".text.hot" to arm unwind tables
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/module.h | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/module.c | 8 |
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 85c3fb6c93c2..084dc8896986 100644 --- a/arch/arm/kernel/module.c +++ b/arch/arm/kernel/module.c @@ -292,12 +292,20 @@ int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs, maps[ARM_SEC_CORE].unw_sec = s; else if (strcmp(".ARM.exidx.exit.text", secname) == 0) maps[ARM_SEC_EXIT].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(".text", secname) == 0) maps[ARM_SEC_CORE].txt_sec = s; else if (strcmp(".exit.text", secname) == 0) maps[ARM_SEC_EXIT].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++) |