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: $V\n";
exit(1);
}
my ($arch, $bits, $objdump, $objcopy, $cc,
$ld, $nm, $rm, $mv, $is_module, $inputfile) = @ARGV;
+# This file refers to mcount and shouldn't be ftraced, so lets' ignore it
+if ($inputfile eq "kernel/trace/ftrace.o") {
+ exit(0);
+}
+
# Acceptable sections to record.
my %text_sections = (
".text" => 1,
$alignment = 2;
$section_type = '%progbits';
+} elsif ($arch eq "ia64") {
+ $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
+ $type = "data8";
+
+ if ($is_module eq "0") {
+ $cc .= " -mconstant-gp";
+ }
} else {
die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
}
"\tDisabling local function references.\n";
}
-
#
# Step 1: find all the local (static functions) and weak symbols.
# 't' is local, 'w/W' is weak (we never use a weak function)
#
# Step 2: find the sections and mcount call sites
#
-open(IN, "$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})) {
$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