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modpost: make symbol white list a per mismatch type variable

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Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2010-01-30 20:52:50 +01:00
parent fc2f7efadb
commit af92a82d0f
1 changed files with 31 additions and 18 deletions
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49
scripts/mod/modpost.c
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@ -817,18 +817,15 @@ static const char *data_sections[] = { DATA_SECTIONS, NULL };
/* symbols in .data that may refer to init/exit sections */
static const char *symbol_white_list[] =
{
"*driver",
"*_template", /* scsi uses *_template a lot */
"*_timer", /* arm uses ops structures named _timer a lot */
"*_sht", /* scsi also used *_sht to some extent */
"*_ops",
"*_probe",
"*_probe_one",
"*_console",
NULL
};
#define DEFAULT_SYMBOL_WHITE_LIST \
"*driver", \
"*_template", /* scsi uses *_template a lot */ \
"*_timer", /* arm uses ops structures named _timer a lot */ \
"*_sht", /* scsi also used *_sht to some extent */ \
"*_ops", \
"*_probe", \
"*_probe_one", \
"*_console"
static const char *head_sections[] = { ".head.text*", NULL };
static const char *linker_symbols[] =
@ -850,6 +847,7 @@ struct sectioncheck {
const char *fromsec[20];
const char *tosec[20];
enum mismatch mismatch;
const char *symbol_white_list[20];
};
const struct sectioncheck sectioncheck[] = {
@ -860,75 +858,88 @@ const struct sectioncheck sectioncheck[] = {
.fromsec = { TEXT_SECTIONS, NULL },
.tosec = { ALL_INIT_SECTIONS, NULL },
.mismatch = TEXT_TO_ANY_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
{
.fromsec = { DATA_SECTIONS, NULL },
.tosec = { ALL_INIT_SECTIONS, NULL },
.mismatch = DATA_TO_ANY_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
{
.fromsec = { TEXT_SECTIONS, NULL },
.tosec = { ALL_EXIT_SECTIONS, NULL },
.mismatch = TEXT_TO_ANY_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
{
.fromsec = { DATA_SECTIONS, NULL },
.tosec = { ALL_EXIT_SECTIONS, NULL },
.mismatch = DATA_TO_ANY_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not reference init code/data from devinit/cpuinit/meminit code/data */
{
.fromsec = { ALL_XXXINIT_SECTIONS, NULL },
.tosec = { INIT_SECTIONS, NULL },
.mismatch = XXXINIT_TO_SOME_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not reference cpuinit code/data from meminit code/data */
{
.fromsec = { MEM_INIT_SECTIONS, NULL },
.tosec = { CPU_INIT_SECTIONS, NULL },
.mismatch = XXXINIT_TO_SOME_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not reference meminit code/data from cpuinit code/data */
{
.fromsec = { CPU_INIT_SECTIONS, NULL },
.tosec = { MEM_INIT_SECTIONS, NULL },
.mismatch = XXXINIT_TO_SOME_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not reference exit code/data from devexit/cpuexit/memexit code/data */
{
.fromsec = { ALL_XXXEXIT_SECTIONS, NULL },
.tosec = { EXIT_SECTIONS, NULL },
.mismatch = XXXEXIT_TO_SOME_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not reference cpuexit code/data from memexit code/data */
{
.fromsec = { MEM_EXIT_SECTIONS, NULL },
.tosec = { CPU_EXIT_SECTIONS, NULL },
.mismatch = XXXEXIT_TO_SOME_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not reference memexit code/data from cpuexit code/data */
{
.fromsec = { CPU_EXIT_SECTIONS, NULL },
.tosec = { MEM_EXIT_SECTIONS, NULL },
.mismatch = XXXEXIT_TO_SOME_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not use exit code/data from init code */
{
.fromsec = { ALL_INIT_SECTIONS, NULL },
.tosec = { ALL_EXIT_SECTIONS, NULL },
.mismatch = ANY_INIT_TO_ANY_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not use init code/data from exit code */
{
.fromsec = { ALL_EXIT_SECTIONS, NULL },
.tosec = { ALL_INIT_SECTIONS, NULL },
.mismatch = ANY_EXIT_TO_ANY_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
/* Do not export init/exit functions or data */
{
.fromsec = { "__ksymtab*", NULL },
.tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL },
.mismatch = EXPORT_TO_INIT_EXIT
.mismatch = EXPORT_TO_INIT_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
}
};
@ -985,7 +996,8 @@ static const struct sectioncheck *section_mismatch(
* refsymname = __init_begin, _sinittext, _einittext
*
**/
static int secref_whitelist(const char *fromsec, const char *fromsym,
static int secref_whitelist(const struct sectioncheck *mismatch,
const char *fromsec, const char *fromsym,
const char *tosec, const char *tosym)
{
/* Check for pattern 1 */
@ -997,7 +1009,7 @@ static int secref_whitelist(const char *fromsec, const char *fromsym,
/* Check for pattern 2 */
if (match(tosec, init_exit_sections) &&
match(fromsec, data_sections) &&
match(fromsym, symbol_white_list))
match(fromsym, mismatch->symbol_white_list))
return 0;
/* Check for pattern 3 */
@ -1202,7 +1214,7 @@ static void report_sec_mismatch(const char *modname,
fromsym, sec2annotation(tosec), tosym);
break;
case DATA_TO_ANY_INIT: {
const char **s = symbol_white_list;
const char *const *s = mismatch->symbol_white_list;
fprintf(stderr,
"The variable %s references\n"
"the %s %s%s%s\n"
@ -1223,7 +1235,7 @@ static void report_sec_mismatch(const char *modname,
fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym);
break;
case DATA_TO_ANY_EXIT: {
const char **s = symbol_white_list;
const char *const *s = mismatch->symbol_white_list;
fprintf(stderr,
"The variable %s references\n"
"the %s %s%s%s\n"
@ -1304,7 +1316,8 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
tosym = sym_name(elf, to);
/* check whitelist - we may ignore it */
if (secref_whitelist(fromsec, fromsym, tosec, tosym)) {
if (secref_whitelist(mismatch,
fromsec, fromsym, tosec, tosym)) {
report_sec_mismatch(modname, mismatch,
fromsec, r->r_offset, fromsym,
is_function(from), tosec, tosym,