kbuild: check section names consistently in modpost

Now that match() is introduced use it consistently so
we can share the section name definitions.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 60 insertions, 86 deletions

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 6c206b9212b1..986513dcd700 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;
 }