From: AKASHI Takahiro Date: Wed, 30 Apr 2014 09:54:32 +0000 (+0100) Subject: ftrace: Add arm64 support to recordmcount X-Git-Tag: omap-for-v3.16/fixes-against-rc1~91^2~10^2~5 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af64d2aa872a174772ffc00e2558083f70193acb;p=pandora-kernel.git ftrace: Add arm64 support to recordmcount Recordmcount utility under scripts is run, after compiling each object, to find out all the locations of calling _mcount() and put them into specific seciton named __mcount_loc. Then linker collects all such information into a table in the kernel image (between __start_mcount_loc and __stop_mcount_loc) for later use by ftrace. This patch adds arm64 specific definitions to identify such locations. There are two types of implementation, C and Perl. On arm64, only C version is used to build the kernel now that CONFIG_HAVE_C_RECORDMCOUNT is on. But Perl version is also maintained. This patch also contains a workaround just in case where a header file, elf.h, on host machine doesn't have definitions of EM_AARCH64 nor R_AARCH64_ABS64. Without them, compiling C version of recordmcount will fail. Acked-by: Will Deacon Signed-off-by: AKASHI Takahiro Signed-off-by: Will Deacon --- Reading git-diff-tree failed