Merge branch 'modpost' of git://git.pengutronix.de/git/ukl/linux-2.6 into kbuild/for-next
Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Michal Marek
commit
d224a94ab9
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@ -781,10 +781,13 @@ static void check_section(const char *modname, struct elf_info *elf,
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#define ALL_EXIT_TEXT_SECTIONS \
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".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$"
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#define ALL_INIT_SECTIONS INIT_SECTIONS, DEV_INIT_SECTIONS, \
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CPU_INIT_SECTIONS, MEM_INIT_SECTIONS
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#define ALL_EXIT_SECTIONS EXIT_SECTIONS, DEV_EXIT_SECTIONS, \
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CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS
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#define ALL_XXXINIT_SECTIONS DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, \
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MEM_INIT_SECTIONS
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#define ALL_XXXEXIT_SECTIONS DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, \
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MEM_EXIT_SECTIONS
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#define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS
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#define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS
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#define DATA_SECTIONS ".data$", ".data.rel$"
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#define TEXT_SECTIONS ".text$"
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@ -814,33 +817,29 @@ static const char *data_sections[] = { DATA_SECTIONS, NULL };
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/* symbols in .data that may refer to init/exit sections */
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static const char *symbol_white_list[] =
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{
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"*driver",
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"*_template", /* scsi uses *_template a lot */
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"*_timer", /* arm uses ops structures named _timer a lot */
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"*_sht", /* scsi also used *_sht to some extent */
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"*_ops",
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"*_probe",
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"*_probe_one",
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"*_console",
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NULL
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};
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#define DEFAULT_SYMBOL_WHITE_LIST \
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"*driver", \
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"*_template", /* scsi uses *_template a lot */ \
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"*_timer", /* arm uses ops structures named _timer a lot */ \
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"*_sht", /* scsi also used *_sht to some extent */ \
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"*_ops", \
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"*_probe", \
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"*_probe_one", \
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"*_console"
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static const char *head_sections[] = { ".head.text*", NULL };
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static const char *linker_symbols[] =
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{ "__init_begin", "_sinittext", "_einittext", NULL };
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enum mismatch {
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NO_MISMATCH,
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TEXT_TO_INIT,
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DATA_TO_INIT,
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TEXT_TO_EXIT,
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DATA_TO_EXIT,
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XXXINIT_TO_INIT,
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XXXEXIT_TO_EXIT,
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INIT_TO_EXIT,
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EXIT_TO_INIT,
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TEXT_TO_ANY_INIT,
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DATA_TO_ANY_INIT,
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TEXT_TO_ANY_EXIT,
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DATA_TO_ANY_EXIT,
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XXXINIT_TO_SOME_INIT,
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XXXEXIT_TO_SOME_EXIT,
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ANY_INIT_TO_ANY_EXIT,
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ANY_EXIT_TO_ANY_INIT,
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EXPORT_TO_INIT_EXIT,
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};
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@ -848,6 +847,7 @@ struct sectioncheck {
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const char *fromsec[20];
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const char *tosec[20];
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enum mismatch mismatch;
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const char *symbol_white_list[20];
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};
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const struct sectioncheck sectioncheck[] = {
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@ -857,80 +857,103 @@ const struct sectioncheck sectioncheck[] = {
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{
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.fromsec = { TEXT_SECTIONS, NULL },
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.tosec = { ALL_INIT_SECTIONS, NULL },
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.mismatch = TEXT_TO_INIT,
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.mismatch = TEXT_TO_ANY_INIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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{
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.fromsec = { DATA_SECTIONS, NULL },
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.tosec = { ALL_INIT_SECTIONS, NULL },
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.mismatch = DATA_TO_INIT,
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.tosec = { ALL_XXXINIT_SECTIONS, NULL },
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.mismatch = DATA_TO_ANY_INIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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{
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.fromsec = { DATA_SECTIONS, NULL },
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.tosec = { INIT_SECTIONS, NULL },
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.mismatch = DATA_TO_ANY_INIT,
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.symbol_white_list = {
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"*_template", "*_timer", "*_sht", "*_ops",
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"*_probe", "*_probe_one", "*_console", NULL
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},
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},
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{
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.fromsec = { TEXT_SECTIONS, NULL },
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.tosec = { ALL_EXIT_SECTIONS, NULL },
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.mismatch = TEXT_TO_EXIT,
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.mismatch = TEXT_TO_ANY_EXIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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{
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.fromsec = { DATA_SECTIONS, NULL },
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.tosec = { ALL_EXIT_SECTIONS, NULL },
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.mismatch = DATA_TO_EXIT,
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.mismatch = DATA_TO_ANY_EXIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not reference init code/data from devinit/cpuinit/meminit code/data */
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{
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.fromsec = { DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, MEM_INIT_SECTIONS, NULL },
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.fromsec = { ALL_XXXINIT_SECTIONS, NULL },
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.tosec = { INIT_SECTIONS, NULL },
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.mismatch = XXXINIT_TO_INIT,
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.mismatch = XXXINIT_TO_SOME_INIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not reference cpuinit code/data from meminit code/data */
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{
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.fromsec = { MEM_INIT_SECTIONS, NULL },
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.tosec = { CPU_INIT_SECTIONS, NULL },
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.mismatch = XXXINIT_TO_INIT,
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.mismatch = XXXINIT_TO_SOME_INIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not reference meminit code/data from cpuinit code/data */
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{
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.fromsec = { CPU_INIT_SECTIONS, NULL },
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.tosec = { MEM_INIT_SECTIONS, NULL },
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.mismatch = XXXINIT_TO_INIT,
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.mismatch = XXXINIT_TO_SOME_INIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not reference exit code/data from devexit/cpuexit/memexit code/data */
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{
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.fromsec = { DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS, NULL },
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.fromsec = { ALL_XXXEXIT_SECTIONS, NULL },
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.tosec = { EXIT_SECTIONS, NULL },
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.mismatch = XXXEXIT_TO_EXIT,
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.mismatch = XXXEXIT_TO_SOME_EXIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not reference cpuexit code/data from memexit code/data */
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{
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.fromsec = { MEM_EXIT_SECTIONS, NULL },
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.tosec = { CPU_EXIT_SECTIONS, NULL },
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.mismatch = XXXEXIT_TO_EXIT,
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.mismatch = XXXEXIT_TO_SOME_EXIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not reference memexit code/data from cpuexit code/data */
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{
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.fromsec = { CPU_EXIT_SECTIONS, NULL },
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.tosec = { MEM_EXIT_SECTIONS, NULL },
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.mismatch = XXXEXIT_TO_EXIT,
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.mismatch = XXXEXIT_TO_SOME_EXIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not use exit code/data from init code */
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{
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.fromsec = { ALL_INIT_SECTIONS, NULL },
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.tosec = { ALL_EXIT_SECTIONS, NULL },
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.mismatch = INIT_TO_EXIT,
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.mismatch = ANY_INIT_TO_ANY_EXIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not use init code/data from exit code */
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{
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.fromsec = { ALL_EXIT_SECTIONS, NULL },
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.tosec = { ALL_INIT_SECTIONS, NULL },
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.mismatch = EXIT_TO_INIT,
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.mismatch = ANY_EXIT_TO_ANY_INIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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},
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/* Do not export init/exit functions or data */
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{
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.fromsec = { "__ksymtab*", NULL },
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.tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL },
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.mismatch = EXPORT_TO_INIT_EXIT
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.mismatch = EXPORT_TO_INIT_EXIT,
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.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
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}
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};
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static int section_mismatch(const char *fromsec, const char *tosec)
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static const struct sectioncheck *section_mismatch(
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const char *fromsec, const char *tosec)
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{
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int i;
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int elems = sizeof(sectioncheck) / sizeof(struct sectioncheck);
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@ -939,10 +962,10 @@ static int section_mismatch(const char *fromsec, const char *tosec)
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for (i = 0; i < elems; i++) {
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if (match(fromsec, check->fromsec) &&
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match(tosec, check->tosec))
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return check->mismatch;
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return check;
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check++;
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}
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return NO_MISMATCH;
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return NULL;
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}
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/**
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@ -961,7 +984,7 @@ static int section_mismatch(const char *fromsec, const char *tosec)
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* Pattern 2:
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* Many drivers utilise a *driver container with references to
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* add, remove, probe functions etc.
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* These functions may often be marked __init and we do not want to
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* These functions may often be marked __devinit and we do not want to
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* warn here.
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* the pattern is identified by:
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* tosec = init or exit section
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@ -982,7 +1005,8 @@ static int section_mismatch(const char *fromsec, const char *tosec)
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* refsymname = __init_begin, _sinittext, _einittext
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*
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**/
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static int secref_whitelist(const char *fromsec, const char *fromsym,
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static int secref_whitelist(const struct sectioncheck *mismatch,
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const char *fromsec, const char *fromsym,
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const char *tosec, const char *tosym)
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{
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/* Check for pattern 1 */
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@ -994,7 +1018,7 @@ static int secref_whitelist(const char *fromsec, const char *fromsym,
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/* Check for pattern 2 */
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if (match(tosec, init_exit_sections) &&
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match(fromsec, data_sections) &&
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match(fromsym, symbol_white_list))
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match(fromsym, mismatch->symbol_white_list))
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return 0;
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/* Check for pattern 3 */
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@ -1155,7 +1179,8 @@ static int is_function(Elf_Sym *sym)
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* Try to find symbols near it so user can find it.
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* Check whitelist before warning - it may be a false positive.
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*/
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static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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static void report_sec_mismatch(const char *modname,
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const struct sectioncheck *mismatch,
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const char *fromsec,
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unsigned long long fromaddr,
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const char *fromsym,
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@ -1186,8 +1211,8 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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modname, fromsec, fromaddr, from, fromsym, from_p, to, tosec,
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tosym, to_p);
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switch (mismatch) {
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case TEXT_TO_INIT:
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switch (mismatch->mismatch) {
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case TEXT_TO_ANY_INIT:
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fprintf(stderr,
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"The function %s%s() references\n"
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"the %s %s%s%s.\n"
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@ -1197,8 +1222,8 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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to, sec2annotation(tosec), tosym, to_p,
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fromsym, sec2annotation(tosec), tosym);
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break;
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case DATA_TO_INIT: {
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const char **s = symbol_white_list;
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case DATA_TO_ANY_INIT: {
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const char *const *s = mismatch->symbol_white_list;
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fprintf(stderr,
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"The variable %s references\n"
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"the %s %s%s%s\n"
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@ -1211,15 +1236,15 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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fprintf(stderr, "\n");
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break;
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}
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case TEXT_TO_EXIT:
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case TEXT_TO_ANY_EXIT:
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fprintf(stderr,
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"The function %s() references a %s in an exit section.\n"
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"Often the %s %s%s has valid usage outside the exit section\n"
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"and the fix is to remove the %sannotation of %s.\n",
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fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym);
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break;
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case DATA_TO_EXIT: {
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const char **s = symbol_white_list;
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case DATA_TO_ANY_EXIT: {
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const char *const *s = mismatch->symbol_white_list;
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fprintf(stderr,
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"The variable %s references\n"
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"the %s %s%s%s\n"
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@ -1232,8 +1257,8 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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fprintf(stderr, "\n");
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break;
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}
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case XXXINIT_TO_INIT:
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case XXXEXIT_TO_EXIT:
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case XXXINIT_TO_SOME_INIT:
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case XXXEXIT_TO_SOME_EXIT:
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fprintf(stderr,
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"The %s %s%s%s references\n"
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"a %s %s%s%s.\n"
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@ -1243,7 +1268,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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to, sec2annotation(tosec), tosym, to_p,
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tosym, fromsym, tosym);
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break;
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case INIT_TO_EXIT:
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case ANY_INIT_TO_ANY_EXIT:
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fprintf(stderr,
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"The %s %s%s%s references\n"
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"a %s %s%s%s.\n"
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@ -1256,7 +1281,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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to, sec2annotation(tosec), tosym, to_p,
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sec2annotation(tosec), tosym, to_p);
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break;
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case EXIT_TO_INIT:
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case ANY_EXIT_TO_ANY_INIT:
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fprintf(stderr,
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"The %s %s%s%s references\n"
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"a %s %s%s%s.\n"
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@ -1275,8 +1300,6 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
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"Fix this by removing the %sannotation of %s "
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"or drop the export.\n",
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tosym, sec2annotation(tosec), sec2annotation(tosec), tosym);
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case NO_MISMATCH:
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/* To get warnings on missing members */
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break;
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}
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fprintf(stderr, "\n");
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@ -1286,11 +1309,11 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
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Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
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{
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const char *tosec;
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enum mismatch mismatch;
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const struct sectioncheck *mismatch;
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tosec = sec_name(elf, sym->st_shndx);
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mismatch = section_mismatch(fromsec, tosec);
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if (mismatch != NO_MISMATCH) {
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if (mismatch) {
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Elf_Sym *to;
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Elf_Sym *from;
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const char *tosym;
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@ -1302,7 +1325,8 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
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tosym = sym_name(elf, to);
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/* check whitelist - we may ignore it */
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if (secref_whitelist(fromsec, fromsym, tosec, tosym)) {
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if (secref_whitelist(mismatch,
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fromsec, fromsym, tosec, tosym)) {
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report_sec_mismatch(modname, mismatch,
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fromsec, r->r_offset, fromsym,
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is_function(from), tosec, tosym,
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