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kbuild: check section names consistently in modpost

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

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2008-01-20 10:43:27 +01:00
parent 10668220a9
commit 6c5bd235bf
1 changed files with 60 additions and 86 deletions
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146
scripts/mod/modpost.c
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@ -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;
}