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-rwxr-xr-xscripts/recordmcount.pl21
1 files changed, 18 insertions, 3 deletions
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index 2ded5c8e6b8..409596eca12 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -101,7 +101,7 @@ $P =~ s@.*/@@g;
my $V = '0.1';
if ($#ARGV < 7) {
- print "usage: $P arch objdump objcopy cc ld nm rm mv is_module inputfile\n";
+ print "usage: $P arch bits objdump objcopy cc ld nm rm mv is_module inputfile\n";
print "version: $V\n";
exit(1);
}
@@ -275,7 +275,6 @@ if (!$found_version) {
"\tDisabling local function references.\n";
}
-
#
# Step 1: find all the local (static functions) and weak symbols.
# 't' is local, 'w/W' is weak (we never use a weak function)
@@ -343,13 +342,16 @@ sub update_funcs
#
# Step 2: find the sections and mcount call sites
#
-open(IN, "$objdump -dr $inputfile|") || die "error running $objdump";
+open(IN, "$objdump -hdr $inputfile|") || die "error running $objdump";
my $text;
+my $read_headers = 1;
+
while (<IN>) {
# is it a section?
if (/$section_regex/) {
+ $read_headers = 0;
# Only record text sections that we know are safe
if (defined($text_sections{$1})) {
@@ -383,6 +385,19 @@ while (<IN>) {
$ref_func = $text;
}
}
+ } elsif ($read_headers && /$mcount_section/) {
+ #
+ # Somehow the make process can execute this script on an
+ # object twice. If it does, we would duplicate the mcount
+ # section and it will cause the function tracer self test
+ # to fail. Check if the mcount section exists, and if it does,
+ # warn and exit.
+ #
+ print STDERR "ERROR: $mcount_section already in $inputfile\n" .
+ "\tThis may be an indication that your build is corrupted.\n" .
+ "\tDelete $inputfile and try again. If the same object file\n" .
+ "\tstill causes an issue, then disable CONFIG_DYNAMIC_FTRACE.\n";
+ exit(-1);
}
# is this a call site to mcount? If so, record it to print later