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authorIngo Molnar <mingo@elte.hu>2009-04-01 15:54:19 -0400
committerIngo Molnar <mingo@elte.hu>2009-04-01 18:49:02 -0400
commit8302294f43250dc337108c51882a6007f2b1e2e0 (patch)
tree85acd4440799c46a372df9cad170fa0c21e59096 /scripts
parent4fe70410d9a219dabb47328effccae7e7f2a6e26 (diff)
parent2e572895bf3203e881356a4039ab0fa428ed2639 (diff)
Merge branch 'tracing/core-v2' into tracing-for-linus
Conflicts: include/linux/slub_def.h lib/Kconfig.debug mm/slob.c mm/slub.c
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.build13
-rw-r--r--scripts/kallsyms.c57
-rwxr-xr-xscripts/recordmcount.pl37
3 files changed, 96 insertions, 11 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index c7de8b39fcf1..39a9642927d3 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -112,13 +112,13 @@ endif
112# --------------------------------------------------------------------------- 112# ---------------------------------------------------------------------------
113 113
114# Default is built-in, unless we know otherwise 114# Default is built-in, unless we know otherwise
115modkern_cflags := $(CFLAGS_KERNEL) 115modkern_cflags = $(if $(part-of-module), $(CFLAGS_MODULE), $(CFLAGS_KERNEL))
116quiet_modtag := $(empty) $(empty) 116quiet_modtag := $(empty) $(empty)
117 117
118$(real-objs-m) : modkern_cflags := $(CFLAGS_MODULE) 118$(real-objs-m) : part-of-module := y
119$(real-objs-m:.o=.i) : modkern_cflags := $(CFLAGS_MODULE) 119$(real-objs-m:.o=.i) : part-of-module := y
120$(real-objs-m:.o=.s) : modkern_cflags := $(CFLAGS_MODULE) 120$(real-objs-m:.o=.s) : part-of-module := y
121$(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE) 121$(real-objs-m:.o=.lst): part-of-module := y
122 122
123$(real-objs-m) : quiet_modtag := [M] 123$(real-objs-m) : quiet_modtag := [M]
124$(real-objs-m:.o=.i) : quiet_modtag := [M] 124$(real-objs-m:.o=.i) : quiet_modtag := [M]
@@ -205,7 +205,8 @@ endif
205ifdef CONFIG_FTRACE_MCOUNT_RECORD 205ifdef CONFIG_FTRACE_MCOUNT_RECORD
206cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ 206cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
207 "$(if $(CONFIG_64BIT),64,32)" \ 207 "$(if $(CONFIG_64BIT),64,32)" \
208 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" "$(NM)" "$(RM)" "$(MV)" "$(@)"; 208 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
209 "$(if $(part-of-module),1,0)" "$(@)";
209endif 210endif
210 211
211define rule_cc_o_c 212define rule_cc_o_c
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index ad2434b26970..6654cbed965b 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -500,6 +500,51 @@ static void optimize_token_table(void)
500 optimize_result(); 500 optimize_result();
501} 501}
502 502
503/* guess for "linker script provide" symbol */
504static int may_be_linker_script_provide_symbol(const struct sym_entry *se)
505{
506 const char *symbol = (char *)se->sym + 1;
507 int len = se->len - 1;
508
509 if (len < 8)
510 return 0;
511
512 if (symbol[0] != '_' || symbol[1] != '_')
513 return 0;
514
515 /* __start_XXXXX */
516 if (!memcmp(symbol + 2, "start_", 6))
517 return 1;
518
519 /* __stop_XXXXX */
520 if (!memcmp(symbol + 2, "stop_", 5))
521 return 1;
522
523 /* __end_XXXXX */
524 if (!memcmp(symbol + 2, "end_", 4))
525 return 1;
526
527 /* __XXXXX_start */
528 if (!memcmp(symbol + len - 6, "_start", 6))
529 return 1;
530
531 /* __XXXXX_end */
532 if (!memcmp(symbol + len - 4, "_end", 4))
533 return 1;
534
535 return 0;
536}
537
538static int prefix_underscores_count(const char *str)
539{
540 const char *tail = str;
541
542 while (*tail != '_')
543 tail++;
544
545 return tail - str;
546}
547
503static int compare_symbols(const void *a, const void *b) 548static int compare_symbols(const void *a, const void *b)
504{ 549{
505 const struct sym_entry *sa; 550 const struct sym_entry *sa;
@@ -521,6 +566,18 @@ static int compare_symbols(const void *a, const void *b)
521 if (wa != wb) 566 if (wa != wb)
522 return wa - wb; 567 return wa - wb;
523 568
569 /* sort by "linker script provide" type */
570 wa = may_be_linker_script_provide_symbol(sa);
571 wb = may_be_linker_script_provide_symbol(sb);
572 if (wa != wb)
573 return wa - wb;
574
575 /* sort by the number of prefix underscores */
576 wa = prefix_underscores_count((const char *)sa->sym + 1);
577 wb = prefix_underscores_count((const char *)sb->sym + 1);
578 if (wa != wb)
579 return wa - wb;
580
524 /* sort by initial order, so that other symbols are left undisturbed */ 581 /* sort by initial order, so that other symbols are left undisturbed */
525 return sa->start_pos - sb->start_pos; 582 return sa->start_pos - sb->start_pos;
526} 583}
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index fe831412bea9..409596eca124 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -100,14 +100,19 @@ $P =~ s@.*/@@g;
100 100
101my $V = '0.1'; 101my $V = '0.1';
102 102
103if ($#ARGV < 6) { 103if ($#ARGV < 7) {
104 print "usage: $P arch objdump objcopy cc ld nm rm mv inputfile\n"; 104 print "usage: $P arch bits objdump objcopy cc ld nm rm mv is_module inputfile\n";
105 print "version: $V\n"; 105 print "version: $V\n";
106 exit(1); 106 exit(1);
107} 107}
108 108
109my ($arch, $bits, $objdump, $objcopy, $cc, 109my ($arch, $bits, $objdump, $objcopy, $cc,
110 $ld, $nm, $rm, $mv, $inputfile) = @ARGV; 110 $ld, $nm, $rm, $mv, $is_module, $inputfile) = @ARGV;
111
112# This file refers to mcount and shouldn't be ftraced, so lets' ignore it
113if ($inputfile eq "kernel/trace/ftrace.o") {
114 exit(0);
115}
111 116
112# Acceptable sections to record. 117# Acceptable sections to record.
113my %text_sections = ( 118my %text_sections = (
@@ -201,6 +206,13 @@ if ($arch eq "x86_64") {
201 $alignment = 2; 206 $alignment = 2;
202 $section_type = '%progbits'; 207 $section_type = '%progbits';
203 208
209} elsif ($arch eq "ia64") {
210 $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
211 $type = "data8";
212
213 if ($is_module eq "0") {
214 $cc .= " -mconstant-gp";
215 }
204} else { 216} else {
205 die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD"; 217 die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
206} 218}
@@ -263,7 +275,6 @@ if (!$found_version) {
263 "\tDisabling local function references.\n"; 275 "\tDisabling local function references.\n";
264} 276}
265 277
266
267# 278#
268# Step 1: find all the local (static functions) and weak symbols. 279# Step 1: find all the local (static functions) and weak symbols.
269# 't' is local, 'w/W' is weak (we never use a weak function) 280# 't' is local, 'w/W' is weak (we never use a weak function)
@@ -331,13 +342,16 @@ sub update_funcs
331# 342#
332# Step 2: find the sections and mcount call sites 343# Step 2: find the sections and mcount call sites
333# 344#
334open(IN, "$objdump -dr $inputfile|") || die "error running $objdump"; 345open(IN, "$objdump -hdr $inputfile|") || die "error running $objdump";
335 346
336my $text; 347my $text;
337 348
349my $read_headers = 1;
350
338while (<IN>) { 351while (<IN>) {
339 # is it a section? 352 # is it a section?
340 if (/$section_regex/) { 353 if (/$section_regex/) {
354 $read_headers = 0;
341 355
342 # Only record text sections that we know are safe 356 # Only record text sections that we know are safe
343 if (defined($text_sections{$1})) { 357 if (defined($text_sections{$1})) {
@@ -371,6 +385,19 @@ while (<IN>) {
371 $ref_func = $text; 385 $ref_func = $text;
372 } 386 }
373 } 387 }
388 } elsif ($read_headers && /$mcount_section/) {
389 #
390 # Somehow the make process can execute this script on an
391 # object twice. If it does, we would duplicate the mcount
392 # section and it will cause the function tracer self test
393 # to fail. Check if the mcount section exists, and if it does,
394 # warn and exit.
395 #
396 print STDERR "ERROR: $mcount_section already in $inputfile\n" .
397 "\tThis may be an indication that your build is corrupted.\n" .
398 "\tDelete $inputfile and try again. If the same object file\n" .
399 "\tstill causes an issue, then disable CONFIG_DYNAMIC_FTRACE.\n";
400 exit(-1);
374 } 401 }
375 402
376 # is this a call site to mcount? If so, record it to print later 403 # is this a call site to mcount? If so, record it to print later