[PATCH 08/10] ARM: ftrace: fix and update dynamic ftrace
From: rostedt@goodmis.org (Steven Rostedt)
Date: 2010-03-13 17:43:05
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On Sat, 2010-03-13 at 12:19 +0530, Rabin Vincent wrote:
This adds mcount recording and updates dynamic ftrace for ARM to work with the new ftrace dyamic tracing implementation. It also adds support for the mcount format used by newer ARM compilers. With dynamic tracing, mcount() is implemented as a nop. Callsites are patched on startup with nops, and dynamically patched to call to the ftrace_caller() routine as needed. Signed-off-by: Rabin Vincent <rabin@rab.i
quoted hunk ↗ jump to hunk
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index f3c9c0a..319af1e 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl@@ -268,6 +268,8 @@ if ($arch eq "x86_64") { } elsif ($arch eq "arm") { $alignment = 2; $section_type = '%progbits'; + $mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_ARM_(CALL|PC24)" . + "\\s+(__gnu_mcount_nc|mcount)\$"; } elsif ($arch eq "ia64") { $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
Acked-by: Steven Rostedt <rostedt@goodmis.org> -- Steve