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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-29 22:46:14 +1100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-29 22:46:14 +1100 |
| commit | 5ea293a9048d3a58cb0c840fa719d85ad14cba47 (patch) | |
| tree | 88d1dd1eece2cfcbd858ff2c00fb0240dcfab3c7 /lib | |
| parent | 03bc26cfefd6db756e6bc7fcda11dc17ada7be16 (diff) | |
| parent | d3883ecebbf9e095b9e379dabbbe8b2c1ee7a41c (diff) | |
| download | kernel-common-5ea293a9048d3a58cb0c840fa719d85ad14cba47.tar.gz kernel-common-5ea293a9048d3a58cb0c840fa719d85ad14cba47.tar.bz2 kernel-common-5ea293a9048d3a58cb0c840fa719d85ad14cba47.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (79 commits)
Remove references to "make dep"
kconfig: document use of HAVE_*
Introduce new section reference annotations tags: __ref, __refdata, __refconst
kbuild: warn about ld added unique sections
kbuild: add verbose option to Section mismatch reporting in modpost
kconfig: tristate choices with mixed tristate and boolean values
asm-generic/vmlix.lds.h: simplify __mem{init,exit}* dependencies
remove __attribute_used__
kbuild: support ARCH=x86 in buildtar
kconfig: remove "enable"
kbuild: simplified warning report in modpost
kbuild: introduce a few helpers in modpost
kbuild: use simpler section mismatch warnings in modpost
kbuild: link vmlinux.o before kallsyms passes
kbuild: introduce new option to enhance section mismatch analysis
Use separate sections for __dev/__cpu/__mem code/data
compiler.h: introduce __section()
all archs: consolidate init and exit sections in vmlinux.lds.h
kbuild: check section names consistently in modpost
kbuild: introduce blacklisting in modpost
...
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 14fb355e3caa..c4ecb2994ba3 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -79,6 +79,38 @@ config HEADERS_CHECK exported to $(INSTALL_HDR_PATH) (usually 'usr/include' in your build tree), to make sure they're suitable. +config DEBUG_SECTION_MISMATCH + bool "Enable full Section mismatch analysis" + default n + help + The section mismatch analysis checks if there are illegal + references from one section to another section. + Linux will during link or during runtime drop some sections + and any use of code/data previously in these sections will + most likely result in an oops. + In the code functions and variables are annotated with + __init, __devinit etc. (see full list in include/linux/init.h) + which result in the code/data being placed in specific sections. + The section mismatch anaylsis are always done after a full + kernel build but enabling this options will in addition + do the following: + - Add the option -fno-inline-functions-called-once to gcc + When inlining a function annotated __init in a non-init + function we would loose the section information and thus + the analysis would not catch the illegal reference. + This options tell gcc to inline less but will also + result in a larger kernel. + - Run the section mismatch analysis for each module/built-in.o + When we run the section mismatch analysis on vmlinux.o we + looses valueable information about where the mismatch was + introduced. + Running the analysis for each module/built-in.o file + will tell where the mismatch happens much closer to the + source. The drawback is that we will report the same + mismatch at least twice. + - Enable verbose reporting from modpost to help solving + the section mismatches reported. + config DEBUG_KERNEL bool "Kernel debugging" help |