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2015-05-15Enable SKIBOOT_GCOV build option for building with profilingStewart Smith1-0/+4
Enable build options for building skiboot with GCOV profiling, including a skeleton -lgcov replacement in the form of core/gcov-profiling.c We don't actually have to do anything as part of the gcov routines, gcov auto generates everything we need. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2015-02-26sparse: add make variable C to run sparse when compiling skibootCédric Le Goater1-0/+3
As this is done on the Linux kernel, one can now run sparse using C=1 on the command line. The variable CF can be used to tune the sparse options. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2015-02-23Makefile: Link with libgccMichael Neuling1-2/+3
Add linking with libgcc so that we can access functions like __builtin_*. Final size of skiboot remains unchanged with this patch. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2015-01-28Makefile: Move -m options from CPPFLAGS to CFLAGS & AFLAGSJeremy Kerr1-3/+3
The -m options are for the compiler, not the preprocessor. Since we may execute CC without CPPFLAGS, move these options to CFLAGS & AFLAGS. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-18Run the CCAN unit tests and add to coverage-reportStewart Smith1-3/+3
With some fun Makefile rules, we can pick up all CCAN unit tests. We exclude the unit test source files from the lcov report itself. Add skeleton ccan config.h and tap.h that are enough for us to build and run the test suite. Currently, the minimalist versions should be fine (and we don't need CCAN configurator). Also includes -Werror fixes for ccan tests. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-15Fix makefile dependency generation, especially for HOSTCCStewart Smith1-1/+1
Instead of having individual rules to generate .d, add -MMD to HOSTCC parameters, and just include the generated .d files. This fixes a few weird dependency issues. Also, make the mambo hello_kernel test depend on skiboot.lid Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-10Enable -WerrorStewart Smith1-2/+2
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-05Reduce -Wstack-usage down to 1024 bytes.Stewart Smith1-2/+2
We now warn on any function or stack frame that's going to use more than 1024 bytes of stack. The current biggest user with 912 bytes is p7ioc_init_ci_routing() Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-26fix Makefile when using a build directoryCédric Le Goater1-1/+2
When using a build directory different from the source tree, .C files and make_version.sh are not found : make: *** No rule to make target `libpore/p8_pore_table_gen_api_fixed.o', needed by `libpore/built-in.o'. make: *** No rule to make target `make_version.sh', needed by `version.c'. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-22Merge remote-tracking branch 'ltcgit/master'Benjamin Herrenschmidt1-12/+24
2014-11-19don't echo version during make.Stewart Smith1-1/+0
whoops Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-19Fail build when SKIBOOT_VERSION not set and not in git treeskiboot-4.0Stewart Smith1-1/+6
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-19Implement skiboot versioningStewart Smith1-8/+16
We grab a version from git tags (or SKIBOOT_VERSION environment variable), optionally tack on EXTRA_VERSION (if from git) as well as add things to the git version number if we're ahead of the most recent tag or the tree is dirty. Also fix-up makefiles so that we don't have to rebuild version.c every time you run make. fsp attn area needed updating as we can have >40 character version strings. We also export the version string via device tree rather than just the gitid. For buildroot builds, setting SKIBOOT_VERSION environment variable to the tag you grab will do the correct thing. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-18Add symbolic backtraces and expose skiboot map to LinuxBenjamin Herrenschmidt1-5/+10
We use a double link technique, doing a first pass with a .o containing a dummy symbol map, then re-linking with a new .o Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-17Stack checking extensionsBenjamin Herrenschmidt1-1/+10
This patch adds: - Normal builds are done with -fstack-protector (we want to investigate using -fstack-protector-strong on gcc4.9 but for now we just use that - Build with STACK_CHECK=1 will use -fstack-protector-all and -pg and will check the stack in mcount Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-11-17Quote built-in kernel path from MakefileBenjamin Herrenschmidt1-1/+1
Otherwise, if your path contains something like "linux-foo" then the "linux" part gets replaced by the preprocessor due to stupid built-ins. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-10-22Preliminary code coverage reporting infrastructureStewart Smith1-0/+8
Add support in core/test/Makefile.check to build -gcov binaries (with -lgcov and -fprofile-blah-blah) as well as some targets for producing lcov HTML code coverage reports. As part of this, I had to fix up an oddity in run-mem_region_init where that due to running under Valgrind, we'd be malloc()ed a heap with a small address, well inside the mem_regions we added but when not running under valgrind (e.g. for code coverage reporting) we would get a much larger address, outside this range and hit an assert. So, after fiddling with the memory stuff for this test, I think I have it right - it passes both under valgrind and not and does produce code coverage data. Currently, we're at this level of code coverage by unit tests: Hit Total Coverage Lines: 1936 2574 75.2 % Functions: 177 225 78.7 % Branches: 1243 2360 52.7 % The totals should largely be ignored due to the only code being counted is that linked into the unit tests (total LOC is ~50kLOC according to sloccount... so unit tests currently cover < 5%) Try the "make coverage-report" target, you'll get coverage-report directory with a LCOV HTML report Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-08-13Fix gitid generation when not in a git repositoryJoel Stanley1-1/+3
If skiboot doesn't live in a git repository, the makefile will go searching up the directory tree for one. To save confusion, only look in the source tree for the git repository. The gitid can be overridden by passing GIT_SHA=foo as an argument to make. This is useful for doing builds outside of a git tree, as buildroot does. Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-08-08Pretty print objcopy in build outputJoel Stanley1-1/+1
The objcopy call was the odd one out in our build output. Before: [LD] hw/built-in.o [LD] skiboot.elf powerpc-linux-gnu-objcopy -O binary -S skiboot.elf skiboot.lid [NM] skiboot.map After: [LD] hw/built-in.o [LD] skiboot.elf [OBJCOPY] skiboot.lid [NM] skiboot.map Signed-off-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-08-08Build with -ffreestanding so we can override printfStewart Smith1-3/+3
It turns out that GCC will use a builtin printf implementation that directly wraps vfprintf (or something), so when I tried to do my neat trick of overriding printf() with a call to vprlog() adding the timebase and default log level to the log message, it wouldn't work as GCC was being helpful. This change to compiler options will mean that other places where GCC is being helpful and using builtins rather than our implementations will go away, potentially helping/hurting us. We probably want to build with -ffreestanding anyway though. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-02Initial commit of Open Source releaseBenjamin Herrenschmidt1-0/+154
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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