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Date: Sun, 20 Jan 2008 21:09:00 +0100
From: Sam Ravnborg <sam@...nborg.org>
To: linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
linux-arch@...r.kernel.org
Cc: Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH] 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@...nborg.org>
---
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 6c206b9..986513d 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;
}
--
1.5.4.rc3.14.g44397
--
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