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Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

Browse Source 
Pull kbuild updates from Michal Marek:

 - prototypes for x86 asm-exported symbols (Adam Borowski) and a warning
   about missing CRCs (Nick Piggin)

 - asm-exports fix for LTO (Nicolas Pitre)

 - thin archives improvements (Nick Piggin)

 - linker script fix for CONFIG_LD_DEAD_CODE_DATA_ELIMINATION (Nick
   Piggin)

 - genksyms support for __builtin_va_list keyword

 - misc minor fixes

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  x86/kbuild: enable modversions for symbols exported from asm
  kbuild: fix scripts/adjust_autoksyms.sh* for the no modules case
  scripts/kallsyms: remove last remnants of --page-offset option
  make use of make variable CURDIR instead of calling pwd
  kbuild: cmd_export_list: tighten the sed script
  kbuild: minor improvement for thin archives build
  kbuild: modpost warn if export version crc is missing
  kbuild: keep data tables through dead code elimination
  kbuild: improve linker compatibility with lib-ksyms.o build
  genksyms: Regenerate parser
  kbuild/genksyms: handle va_list type
  kbuild: thin archives for multi-y targets
  kbuild: kallsyms allow 3-pass generation if symbols size has changed
This commit is contained in:
Linus Torvalds
2016-12-17 16:24:13 -08:00
parent 0aaf2146ec 334bb77387
commit 41e0e24b45
27 changed files with 522 additions and 474 deletions
Download Patch File Download Diff File Expand all files Collapse all files
scripts/Makefile.build
+12 -5
View File
@@ -488,9 +488,9 @@ endif
quiet_cmd_export_list = EXPORTS $@
cmd_export_list = $(OBJDUMP) -h $< | \
sed -ne '/___ksymtab/{s/.*+/$(ref_prefix)/;s/ .*/)/;p}' >$(ksyms-lds);\
sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/$(ref_prefix)\1)/p' >$(ksyms-lds);\
rm -f $(dummy-object);\
$(AR) rcs$(KBUILD_ARFLAGS) $(dummy-object);\
echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\
$(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\
rm $(dummy-object) $(ksyms-lds)
@@ -517,11 +517,18 @@ $($(subst $(obj)/,,$(@:.o=-objs))) \
$($(subst $(obj)/,,$(@:.o=-y))) \
$($(subst $(obj)/,,$(@:.o=-m)))), $^)
quiet_cmd_link_multi-y = LD $@
cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
ifdef CONFIG_THIN_ARCHIVES
quiet_cmd_link_multi-y = AR $@
cmd_link_multi-y = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS) $@ $(link_multi_deps)
else
quiet_cmd_link_multi-y = LD $@
cmd_link_multi-y = $(cmd_link_multi-link)
endif
quiet_cmd_link_multi-m = LD [M] $@
cmd_link_multi-m = $(cmd_link_multi-y)
cmd_link_multi-m = $(cmd_link_multi-link)
$(multi-used-y): FORCE
$(call if_changed,link_multi-y)
scripts/adjust_autoksyms.sh
+1
View File
@@ -59,6 +59,7 @@ cat > "$new_ksyms_file" << EOT
*/
EOT
[ "$(ls -A "$MODVERDIR")" ] &&
sed -ns -e '3{s/ /\n/g;/^$/!p;}' "$MODVERDIR"/*.mod | sort -u |
while read sym; do
if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then
scripts/genksyms/keywords.gperf
+1
View File
@@ -27,6 +27,7 @@ __typeof, TYPEOF_KEYW
__typeof__, TYPEOF_KEYW
__volatile, VOLATILE_KEYW
__volatile__, VOLATILE_KEYW
__builtin_va_list, VA_LIST_KEYW
# According to rth, c99 defines _Bool, __restrict, __restrict__, restrict. KAO
_Bool, BOOL_KEYW
_restrict, RESTRICT_KEYW
scripts/genksyms/keywords.hash.c_shipped
+33 -32
View File
@@ -57,7 +57,7 @@ is_reserved_hash (register const char *str, register unsigned int len)
101, 101, 101, 101, 101, 101, 101, 101, 101, 0,
101, 101, 101, 101, 101, 101, 15, 101, 101, 101,
0, 101, 101, 101, 101, 101, 101, 101, 101, 101,
101, 101, 101, 101, 101, 0, 101, 0, 101, 5,
101, 101, 101, 101, 101, 0, 101, 0, 0, 5,
25, 20, 55, 30, 101, 15, 101, 101, 10, 0,
10, 40, 10, 101, 10, 5, 0, 10, 15, 101,
101, 101, 101, 101, 101, 101, 101, 101, 101, 101,
@@ -89,7 +89,7 @@ is_reserved_word (register const char *str, register unsigned int len)
{
enum
{
TOTAL_KEYWORDS = 46,
TOTAL_KEYWORDS = 47,
MIN_WORD_LENGTH = 3,
MAX_WORD_LENGTH = 24,
MIN_HASH_VALUE = 3,
@@ -99,7 +99,7 @@ is_reserved_word (register const char *str, register unsigned int len)
static const struct resword wordlist[] =
{
{""}, {""}, {""},
#line 35 "scripts/genksyms/keywords.gperf"
#line 36 "scripts/genksyms/keywords.gperf"
{"asm", ASM_KEYW},
{""},
#line 15 "scripts/genksyms/keywords.gperf"
@@ -119,20 +119,21 @@ is_reserved_word (register const char *str, register unsigned int len)
{"__const__", CONST_KEYW},
#line 25 "scripts/genksyms/keywords.gperf"
{"__signed__", SIGNED_KEYW},
#line 53 "scripts/genksyms/keywords.gperf"
{"static", STATIC_KEYW},
{""},
#line 48 "scripts/genksyms/keywords.gperf"
{"int", INT_KEYW},
#line 41 "scripts/genksyms/keywords.gperf"
{"char", CHAR_KEYW},
#line 42 "scripts/genksyms/keywords.gperf"
{"const", CONST_KEYW},
#line 54 "scripts/genksyms/keywords.gperf"
{"static", STATIC_KEYW},
#line 30 "scripts/genksyms/keywords.gperf"
{"__builtin_va_list", VA_LIST_KEYW},
#line 49 "scripts/genksyms/keywords.gperf"
{"int", INT_KEYW},
#line 42 "scripts/genksyms/keywords.gperf"
{"char", CHAR_KEYW},
#line 43 "scripts/genksyms/keywords.gperf"
{"const", CONST_KEYW},
#line 55 "scripts/genksyms/keywords.gperf"
{"struct", STRUCT_KEYW},
#line 33 "scripts/genksyms/keywords.gperf"
{"__restrict__", RESTRICT_KEYW},
#line 34 "scripts/genksyms/keywords.gperf"
{"__restrict__", RESTRICT_KEYW},
#line 35 "scripts/genksyms/keywords.gperf"
{"restrict", RESTRICT_KEYW},
#line 12 "scripts/genksyms/keywords.gperf"
{"EXPORT_SYMBOL_GPL_FUTURE", EXPORT_SYMBOL_KEYW},
@@ -143,7 +144,7 @@ is_reserved_word (register const char *str, register unsigned int len)
{"__volatile__", VOLATILE_KEYW},
#line 10 "scripts/genksyms/keywords.gperf"
{"EXPORT_SYMBOL", EXPORT_SYMBOL_KEYW},
#line 32 "scripts/genksyms/keywords.gperf"
#line 33 "scripts/genksyms/keywords.gperf"
{"_restrict", RESTRICT_KEYW},
{""},
#line 17 "scripts/genksyms/keywords.gperf"
@@ -152,64 +153,64 @@ is_reserved_word (register const char *str, register unsigned int len)
{"EXPORT_SYMBOL_GPL", EXPORT_SYMBOL_KEYW},
#line 21 "scripts/genksyms/keywords.gperf"
{"__extension__", EXTENSION_KEYW},
#line 44 "scripts/genksyms/keywords.gperf"
#line 45 "scripts/genksyms/keywords.gperf"
{"enum", ENUM_KEYW},
#line 13 "scripts/genksyms/keywords.gperf"
{"EXPORT_UNUSED_SYMBOL", EXPORT_SYMBOL_KEYW},
#line 45 "scripts/genksyms/keywords.gperf"
#line 46 "scripts/genksyms/keywords.gperf"
{"extern", EXTERN_KEYW},
{""},
#line 24 "scripts/genksyms/keywords.gperf"
{"__signed", SIGNED_KEYW},
#line 14 "scripts/genksyms/keywords.gperf"
{"EXPORT_UNUSED_SYMBOL_GPL", EXPORT_SYMBOL_KEYW},
#line 57 "scripts/genksyms/keywords.gperf"
#line 58 "scripts/genksyms/keywords.gperf"
{"union", UNION_KEYW},
{""}, {""},
#line 22 "scripts/genksyms/keywords.gperf"
{"__inline", INLINE_KEYW},
#line 40 "scripts/genksyms/keywords.gperf"
#line 41 "scripts/genksyms/keywords.gperf"
{"auto", AUTO_KEYW},
#line 28 "scripts/genksyms/keywords.gperf"
{"__volatile", VOLATILE_KEYW},
{""}, {""},
#line 58 "scripts/genksyms/keywords.gperf"
#line 59 "scripts/genksyms/keywords.gperf"
{"unsigned", UNSIGNED_KEYW},
{""},
#line 51 "scripts/genksyms/keywords.gperf"
#line 52 "scripts/genksyms/keywords.gperf"
{"short", SHORT_KEYW},
#line 47 "scripts/genksyms/keywords.gperf"
#line 48 "scripts/genksyms/keywords.gperf"
{"inline", INLINE_KEYW},
{""},
#line 60 "scripts/genksyms/keywords.gperf"
#line 61 "scripts/genksyms/keywords.gperf"
{"volatile", VOLATILE_KEYW},
#line 49 "scripts/genksyms/keywords.gperf"
#line 50 "scripts/genksyms/keywords.gperf"
{"long", LONG_KEYW},
#line 31 "scripts/genksyms/keywords.gperf"
#line 32 "scripts/genksyms/keywords.gperf"
{"_Bool", BOOL_KEYW},
{""}, {""},
#line 50 "scripts/genksyms/keywords.gperf"
#line 51 "scripts/genksyms/keywords.gperf"
{"register", REGISTER_KEYW},
#line 59 "scripts/genksyms/keywords.gperf"
#line 60 "scripts/genksyms/keywords.gperf"
{"void", VOID_KEYW},
{""},
#line 43 "scripts/genksyms/keywords.gperf"
#line 44 "scripts/genksyms/keywords.gperf"
{"double", DOUBLE_KEYW},
{""},
#line 26 "scripts/genksyms/keywords.gperf"
{"__typeof", TYPEOF_KEYW},
{""}, {""},
#line 52 "scripts/genksyms/keywords.gperf"
#line 53 "scripts/genksyms/keywords.gperf"
{"signed", SIGNED_KEYW},
{""}, {""}, {""}, {""},
#line 56 "scripts/genksyms/keywords.gperf"
#line 57 "scripts/genksyms/keywords.gperf"
{"typeof", TYPEOF_KEYW},
#line 55 "scripts/genksyms/keywords.gperf"
#line 56 "scripts/genksyms/keywords.gperf"
{"typedef", TYPEDEF_KEYW},
{""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
{""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
{""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
#line 46 "scripts/genksyms/keywords.gperf"
#line 47 "scripts/genksyms/keywords.gperf"
{"float", FLOAT_KEYW}
};
scripts/genksyms/parse.tab.c_shipped
+356 -352
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File diff suppressed because it is too large Load Diff
scripts/genksyms/parse.tab.h_shipped
+17 -16
View File
@@ -72,22 +72,23 @@ extern int yydebug;
VOID_KEYW = 281,
VOLATILE_KEYW = 282,
TYPEOF_KEYW = 283,
EXPORT_SYMBOL_KEYW = 284,
ASM_PHRASE = 285,
ATTRIBUTE_PHRASE = 286,
TYPEOF_PHRASE = 287,
BRACE_PHRASE = 288,
BRACKET_PHRASE = 289,
EXPRESSION_PHRASE = 290,
CHAR = 291,
DOTS = 292,
IDENT = 293,
INT = 294,
REAL = 295,
STRING = 296,
TYPE = 297,
OTHER = 298,
FILENAME = 299
VA_LIST_KEYW = 284,
EXPORT_SYMBOL_KEYW = 285,
ASM_PHRASE = 286,
ATTRIBUTE_PHRASE = 287,
TYPEOF_PHRASE = 288,
BRACE_PHRASE = 289,
BRACKET_PHRASE = 290,
EXPRESSION_PHRASE = 291,
CHAR = 292,
DOTS = 293,
IDENT = 294,
INT = 295,
REAL = 296,
STRING = 297,
TYPE = 298,
OTHER = 299,
FILENAME = 300
};
#endif
scripts/genksyms/parse.y
+2
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@@ -98,6 +98,7 @@ static void record_compound(struct string_list **keyw,
%token VOID_KEYW
%token VOLATILE_KEYW
%token TYPEOF_KEYW
%token VA_LIST_KEYW
%token EXPORT_SYMBOL_KEYW
@@ -261,6 +262,7 @@ simple_type_specifier:
| DOUBLE_KEYW
| VOID_KEYW
| BOOL_KEYW
| VA_LIST_KEYW
| TYPE { (*$1)->tag = SYM_TYPEDEF; $$ = $1; }
;
scripts/kallsyms.c
-1
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@@ -76,7 +76,6 @@ static void usage(void)
{
fprintf(stderr, "Usage: kallsyms [--all-symbols] "
"[--symbol-prefix=<prefix char>] "
"[--page-offset=<CONFIG_PAGE_OFFSET>] "
"[--base-relative] < in.map > out.S\n");
exit(1);
}
scripts/link-vmlinux.sh
+22 -15
View File
@@ -209,15 +209,6 @@ case "${KCONFIG_CONFIG}" in
. "./${KCONFIG_CONFIG}"
esac
archive_builtin
#link vmlinux.o
info LD vmlinux.o
modpost_link vmlinux.o
# modpost vmlinux.o to check for section mismatches
${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
# Update version
info GEN .version
if [ ! -r .version ]; then
@@ -231,6 +222,15 @@ fi;
# final build of init/
${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init GCC_PLUGINS_CFLAGS="${GCC_PLUGINS_CFLAGS}"
archive_builtin
#link vmlinux.o
info LD vmlinux.o
modpost_link vmlinux.o
# modpost vmlinux.o to check for section mismatches
${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
kallsymso=""
kallsyms_vmlinux=""
if [ -n "${CONFIG_KALLSYMS}" ]; then
@@ -246,10 +246,14 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
# the right size, but due to the added section, some
# addresses have shifted.
# From here, we generate a correct .tmp_kallsyms2.o
# 2a) We may use an extra pass as this has been necessary to
# woraround some alignment related bugs.
# KALLSYMS_EXTRA_PASS=1 is used to trigger this.
# 3) The correct ${kallsymso} is linked into the final vmlinux.
# 3) That link may have expanded the kernel image enough that
# more linker branch stubs / trampolines had to be added, which
# introduces new names, which further expands kallsyms. Do another
# pass if that is the case. In theory it's possible this results
# in even more stubs, but unlikely.
# KALLSYMS_EXTRA_PASS=1 may also used to debug or work around
# other bugs.
# 4) The correct ${kallsymso} is linked into the final vmlinux.
#
# a) Verify that the System.map from vmlinux matches the map from
# ${kallsymso}.
@@ -265,8 +269,11 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2
kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
# step 2a
if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
# step 3
size1=$(stat -c "%s" .tmp_kallsyms1.o)
size2=$(stat -c "%s" .tmp_kallsyms2.o)
if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
kallsymso=.tmp_kallsyms3.o
kallsyms_vmlinux=.tmp_vmlinux3
scripts/mod/modpost.c
+6
View File
@@ -609,6 +609,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
{
unsigned int crc;
enum export export;
bool is_crc = false;
if ((!is_vmlinux(mod->name) || mod->is_dot_o) &&
strncmp(symname, "__ksymtab", 9) == 0)
@@ -618,6 +619,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
/* CRC'd symbol */
if (strncmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) {
is_crc = true;
crc = (unsigned int) sym->st_value;
sym_update_crc(symname + strlen(CRC_PFX), mod, crc,
export);
@@ -663,6 +665,10 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
else
symname++;
#endif
if (is_crc) {
const char *e = is_vmlinux(mod->name) ?"":".ko";
warn("EXPORT symbol \"%s\" [%s%s] version generation failed, symbol will not be versioned.\n", symname + strlen(CRC_PFX), mod->name, e);
}
mod->unres = alloc_symbol(symname,
ELF_ST_BIND(sym->st_info) == STB_WEAK,
mod->unres);