ftrace: handle generic arch calls

The recordmcount script requires that the actual arch is passed in.
This works well when ARCH=i386 or ARCH=x86_64 but does not handle the
case of ARCH=x86.

This patch adds a parameter to the function to pass in the number of
bits of the architecture. So that it can determine if x86 should be
run for x86_64 or i386 archs.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 18 insertions, 3 deletions

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 5ed4cbf1e0e1..468fbc9016c7 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -198,10 +198,16 @@ cmd_modversions =							\
         fi;
 endif
 
+ifdef CONFIG_64BIT
+arch_bits = 64
+else
+arch_bits = 32
+endif
+
 ifdef CONFIG_FTRACE_MCOUNT_RECORD
 cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl \
-        "$(ARCH)" "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" "$(NM)" "$(RM)" \
-        "$(MV)" "$(@)";
+        "$(ARCH)" "$(arch_bits)" "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" \
+        "$(NM)" "$(RM)" "$(MV)" "$(@)";
 endif
 
 define rule_cc_o_c
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index f56d760bd589..c1c618cd96f6 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -106,7 +106,8 @@ if ($#ARGV < 6) {
         exit(1);
 }
 
-my ($arch, $objdump, $objcopy, $cc, $ld, $nm, $rm, $mv, $inputfile) = @ARGV;
+my ($arch, $bits, $objdump, $objcopy, $cc,
+    $ld, $nm, $rm, $mv, $inputfile) = @ARGV;
 
 $objdump = "objdump" if ((length $objdump) == 0);
 $objcopy = "objcopy" if ((length $objcopy) == 0);
@@ -129,6 +130,14 @@ my $function_regex;	# Find the name of a function
                         #    (return offset and func name)
 my $mcount_regex;       # Find the call site to mcount (return offset)
 
+if ($arch eq "x86") {
+    if ($bits == 64) {
+        $arch = "x86_64";
+    } else {
+        $arch = "i386";
+    }
+}
+
 if ($arch eq "x86_64") {
     $section_regex = "Disassembly of section";
     $function_regex = "^([0-9a-fA-F]+)\\s+<(.*?)>:";