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

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: Jim Radford <radford@galvanix.com> Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Jim Radford · Ingo Molnar
1 parent 3a3d04aed0
Showing 1 changed file with 7 additions and 1 deletions Side-by-side Diff
scripts/recordmcount.pl
@@ -136,6 +136,7 @@
 			#    (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 @@
 $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 @@
 	$type = ".quad";
     }
  
+} elsif ($arch eq "arm") {
+    $alignment = 2;
+    $section_type = '%progbits';
+
 } else {
     die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
 }
@@ -312,7 +318,7 @@
 	if (!$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;
...	...	@@ -136,6 +136,7 @@
136	136	# (return offset and func name)
137	137	my $mcount_regex; # Find the call site to mcount (return offset)
138	138	my $alignment; # The .align value to use for $mcount_section
	139	+my $section_type; # Section header plus possible alignment command
139	140
140	141	if ($arch eq "x86") {
141	142	if ($bits == 64) {
...	...	@@ -153,6 +154,7 @@
153	154	$section_regex = "Disassembly of section\\s+(\\S+):";
154	155	$function_regex = "^([0-9a-fA-F]+)\\s+<(.*?)>:";
155	156	$mcount_regex = "^\\s([0-9a-fA-F]+):.\\smcount\$";
	157	+$section_type = '@progbits';
156	158	$type = ".long";
157	159
158	160	if ($arch eq "x86_64") {
...	...	@@ -192,6 +194,10 @@
192	194	$type = ".quad";
193	195	}
194	196
	197	+} elsif ($arch eq "arm") {
	198	+ $alignment = 2;
	199	+ $section_type = '%progbits';
	200	+
195	201	} else {
196	202	die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
197	203	}
...	...	@@ -312,7 +318,7 @@
312	318	if (!$opened) {
313	319	open(FILE, ">$mcount_s") \|\| die "can't create $mcount_s\n";
314	320	$opened = 1;
315		- print FILE "\t.section $mcount_section,\"a\",\@progbits\n";
	321	+ print FILE "\t.section $mcount_section,\"a\",$section_type\n";
316	322	print FILE "\t.align $alignment\n" if (defined($alignment));
317	323	}
318	324	printf FILE "\t%s %s + %d\n", $type, $ref_func, $offsets[$i] - $offset;