diff options
| -rw-r--r-- | scripts/mod/modpost.c | 146 |
1 files changed, 60 insertions, 86 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 6c206b9212b..986513dcd70 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -625,6 +625,7 @@ static int number_prefix(const char *sym) /* The pattern is an array of simple patterns. * "foo" will match an exact string equal to "foo" + * "*foo" will match a string that ends with "foo" * "foo*" will match a string that begins with "foo" * "foo$" will match a string equal to "foo" or "foo.1" * where the '1' can be any number including several digits. @@ -638,8 +639,13 @@ int match(const char *sym, const char * const pat[]) p = *pat++; const char *endp = p + strlen(p) - 1; + /* "*foo" */ + if (*p == '*') { + if (strrcmp(sym, p + 1) == 0) + return 1; + } /* "foo*" */ - if (*endp == '*') { + else if (*endp == '*') { if (strncmp(sym, p, strlen(p) - 1) == 0) return 1; } @@ -660,54 +666,6 @@ int match(const char *sym, const char * const pat[]) return 0; } -/* - * Functions used only during module init is marked __init and is stored in - * a .init.text section. Likewise data is marked __initdata and stored in - * a .init.data section. - * If this section is one of these sections return 1 - * See include/linux/init.h for the details - */ -static int init_section(const char *name) -{ - if (strcmp(name, ".init") == 0) - return 1; - if (strncmp(name, ".init.", strlen(".init.")) == 0) - return 1; - return 0; -} - -/* - * Functions used only during module exit is marked __exit and is stored in - * a .exit.text section. Likewise data is marked __exitdata and stored in - * a .exit.data section. - * If this section is one of these sections return 1 - * See include/linux/init.h for the details - **/ -static int exit_section(const char *name) -{ - if (strcmp(name, ".exit.text") == 0) - return 1; - if (strcmp(name, ".exit.data") == 0) - return 1; - return 0; - -} - -/* - * Data sections are named like this: - * .data | .data.rel | .data.rel.* - * Return 1 if the specified section is a data section - */ -static int data_section(const char *name) -{ - if ((strcmp(name, ".data") == 0) || - (strcmp(name, ".data.rel") == 0) || - (strncmp(name, ".data.rel.", strlen(".data.rel.")) == 0)) - return 1; - else - return 0; -} - /* sections that we do not want to do full section mismatch check on */ static const char *section_white_list[] = { ".debug*", ".stab*", ".note*", ".got*", ".toc*", NULL }; @@ -721,9 +679,50 @@ static const char *section_white_list[] = #define INIT_SECTIONS INIT_DATA_SECTIONS, INIT_TEXT_SECTIONS #define EXIT_SECTIONS EXIT_DATA_SECTIONS, EXIT_TEXT_SECTIONS -#define DATA_SECTIONS ".data$" +#define DATA_SECTIONS ".data$", ".data.rel$" #define TEXT_SECTIONS ".text$" +/* init data sections */ +static const char *init_data_sections[] = { INIT_DATA_SECTIONS, NULL }; + +/* all init sections */ +static const char *init_sections[] = { INIT_SECTIONS, NULL }; + +/* All init and exit sections (code + data) */ +static const char *init_exit_sections[] = + {INIT_SECTIONS, EXIT_SECTIONS, NULL }; + +/* data section */ +static const char *data_sections[] = { DATA_SECTIONS, NULL }; + +/* sections that may refer to an init/exit section with no warning */ +static const char *initref_sections[] = +{ + ".text.init.refok*", + ".exit.text.refok*", + ".data.init.refok*", + 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 +}; + +static const char *head_sections[] = { ".head.text*", NULL }; +static const char *linker_symbols[] = + { "__init_begin", "_sinittext", "_einittext", NULL }; + struct sectioncheck { const char *fromsec[20]; const char *tosec[20]; @@ -817,55 +816,30 @@ static int secref_whitelist(const char *modname, const char *tosec, const char *fromsec, const char *atsym, const char *refsymname) { - const char **s; - const char *pat2sym[] = { - "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 - }; - - const char *pat3refsym[] = { - "__init_begin", - "_sinittext", - "_einittext", - NULL - }; - /* Check for pattern 0 */ - if ((strncmp(fromsec, ".text.init.refok", strlen(".text.init.refok")) == 0) || - (strncmp(fromsec, ".exit.text.refok", strlen(".exit.text.refok")) == 0) || - (strncmp(fromsec, ".data.init.refok", strlen(".data.init.refok")) == 0)) + if (match(fromsec, initref_sections)) return 1; /* Check for pattern 1 */ - if ((strcmp(tosec, ".init.data") == 0) && - (strncmp(fromsec, ".data", strlen(".data")) == 0) && + if (match(tosec, init_data_sections) && + match(fromsec, data_sections) && (strncmp(atsym, "__param", strlen("__param")) == 0)) return 1; /* Check for pattern 2 */ - if ((init_section(tosec) || exit_section(tosec)) - && data_section(fromsec)) - for (s = pat2sym; *s; s++) - if (strrcmp(atsym, *s) == 0) - return 1; + if (match(tosec, init_exit_sections) && + match(fromsec, data_sections) && + match(atsym, symbol_white_list)) + return 1; /* Check for pattern 3 */ - if ((strcmp(fromsec, ".text.head") == 0) && - ((strcmp(tosec, ".init.data") == 0) || - (strcmp(tosec, ".init.text") == 0))) + if (match(fromsec, head_sections) && + match(tosec, init_sections)) return 1; /* Check for pattern 4 */ - for (s = pat3refsym; *s; s++) - if (strcmp(refsymname, *s) == 0) - return 1; + if (match(refsymname, linker_symbols)) + return 1; return 0; } |