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-rw-r--r--scripts/Makefile.build13
-rwxr-xr-xscripts/recordmcount.pl37
2 files changed, 39 insertions, 11 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index c7de8b3..39a9642 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -112,13 +112,13 @@ endif
# ---------------------------------------------------------------------------
# Default is built-in, unless we know otherwise
-modkern_cflags := $(CFLAGS_KERNEL)
+modkern_cflags = $(if $(part-of-module), $(CFLAGS_MODULE), $(CFLAGS_KERNEL))
quiet_modtag := $(empty) $(empty)
-$(real-objs-m) : modkern_cflags := $(CFLAGS_MODULE)
-$(real-objs-m:.o=.i) : modkern_cflags := $(CFLAGS_MODULE)
-$(real-objs-m:.o=.s) : modkern_cflags := $(CFLAGS_MODULE)
-$(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE)
+$(real-objs-m) : part-of-module := y
+$(real-objs-m:.o=.i) : part-of-module := y
+$(real-objs-m:.o=.s) : part-of-module := y
+$(real-objs-m:.o=.lst): part-of-module := y
$(real-objs-m) : quiet_modtag := [M]
$(real-objs-m:.o=.i) : quiet_modtag := [M]
@@ -205,7 +205,8 @@ endif
ifdef CONFIG_FTRACE_MCOUNT_RECORD
cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
"$(if $(CONFIG_64BIT),64,32)" \
- "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" "$(NM)" "$(RM)" "$(MV)" "$(@)";
+ "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
+ "$(if $(part-of-module),1,0)" "$(@)";
endif
define rule_cc_o_c
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index fe83141..409596e 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -100,14 +100,19 @@ $P =~ s@.*/@@g;
my $V = '0.1';
-if ($#ARGV < 6) {
- print "usage: $P arch objdump objcopy cc ld nm rm mv inputfile\n";
+if ($#ARGV < 7) {
+ 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, $inputfile) = @ARGV;
+ $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 = (
@@ -201,6 +206,13 @@ if ($arch eq "x86_64") {
$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 $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
}
@@ -263,7 +275,6 @@ if (!$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)
@@ -331,13 +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})) {
@@ -371,6 +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
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