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Commit e58918ab authored by Jim Radford's avatar Jim Radford Committed by Ingo Molnar
Browse files

ftrace: scripts/recordmcount.pl support for ARM 



Impact: extend scripts/recordmcount.pl to ARM

Arm uses %progbits instead of @progbits and requires only 4 byte alignment.

[ Thanks to Sam Ravnborg for mentioning that ARM uses %progbits ]

Signed-off-by: default avatarJim Radford <radford@galvanix.com>
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 3a3d04ae

scripts/recordmcount.pl

+7 −1
Original line number Diff line number Diff line
@@ -136,6 +136,7 @@ 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)

my $alignment;		# The .align value to use for $mcount_section

my $section_type;	# Section header plus possible alignment command



if ($arch eq "x86") {

    if ($bits == 64) {
@@ -153,6 +154,7 @@ $nm_regex = "^[0-9a-fA-F]+\\s+t\\s+(\\S+)"; 
$section_regex = "Disassembly of section\\s+(\\S+):";

$function_regex = "^([0-9a-fA-F]+)\\s+<(.*?)>:";

$mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\smcount\$";

$section_type = '@progbits';

$type = ".long";



if ($arch eq "x86_64") {
@@ -192,6 +194,10 @@ if ($arch eq "x86_64") { 
	$type = ".quad";

    }



} elsif ($arch eq "arm") {

    $alignment = 2;

    $section_type = '%progbits';



} else {

    die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";

}
@@ -312,7 +318,7 @@ sub update_funcs 
	if (!$opened) {

	    open(FILE, ">$mcount_s") || die "can't create $mcount_s\n";

	    $opened = 1;

	    print FILE "\t.section $mcount_section,\"a\",\@progbits\n";

	    print FILE "\t.section $mcount_section,\"a\",$section_type\n";

	    print FILE "\t.align $alignment\n" if (defined($alignment));

	}

	printf FILE "\t%s %s + %d\n", $type, $ref_func, $offsets[$i] - $offset;