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Diffstat (limited to 'scripts/mod/modpost.c')
-rw-r--r--scripts/mod/modpost.c197
1 files changed, 101 insertions, 96 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 4d1c59063b2..696d2a59e4b 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2,7 +2,7 @@
*
* Copyright 2003 Kai Germaschewski
* Copyright 2002-2004 Rusty Russell, IBM Corporation
- * Copyright 2006 Sam Ravnborg
+ * Copyright 2006-2008 Sam Ravnborg
* Based in part on module-init-tools/depmod.c,file2alias
*
* This software may be used and distributed according to the terms
@@ -74,7 +74,8 @@ static int is_vmlinux(const char *modname)
{
const char *myname;
- if ((myname = strrchr(modname, '/')))
+ myname = strrchr(modname, '/');
+ if (myname)
myname++;
else
myname = modname;
@@ -85,14 +86,13 @@ static int is_vmlinux(const char *modname)
void *do_nofail(void *ptr, const char *expr)
{
- if (!ptr) {
+ if (!ptr)
fatal("modpost: Memory allocation failure: %s.\n", expr);
- }
+
return ptr;
}
/* A list of all modules we processed */
-
static struct module *modules;
static struct module *find_module(char *modname)
@@ -115,7 +115,8 @@ static struct module *new_module(char *modname)
p = NOFAIL(strdup(modname));
/* strip trailing .o */
- if ((s = strrchr(p, '.')) != NULL)
+ s = strrchr(p, '.');
+ if (s != NULL)
if (strcmp(s, ".o") == 0)
*s = '\0';
@@ -156,7 +157,7 @@ static inline unsigned int tdb_hash(const char *name)
unsigned i; /* Used to cycle through random values. */
/* Set the initial value from the key size. */
- for (value = 0x238F13AF * strlen(name), i=0; name[i]; i++)
+ for (value = 0x238F13AF * strlen(name), i = 0; name[i]; i++)
value = (value + (((unsigned char *)name)[i] << (i*5 % 24)));
return (1103515243 * value + 12345);
@@ -200,7 +201,7 @@ static struct symbol *find_symbol(const char *name)
if (name[0] == '.')
name++;
- for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s=s->next) {
+ for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s = s->next) {
if (strcmp(s->name, name) == 0)
return s;
}
@@ -225,9 +226,10 @@ static const char *export_str(enum export ex)
return export_list[ex].str;
}
-static enum export export_no(const char * s)
+static enum export export_no(const char *s)
{
int i;
+
if (!s)
return export_unknown;
for (i = 0; export_list[i].export != export_unknown; i++) {
@@ -317,7 +319,7 @@ void *grab_file(const char *filename, unsigned long *size)
* spaces in the beginning of the line is trimmed away.
* Return a pointer to a static buffer.
**/
-char* get_next_line(unsigned long *pos, void *file, unsigned long size)
+char *get_next_line(unsigned long *pos, void *file, unsigned long size)
{
static char line[4096];
int skip = 1;
@@ -325,8 +327,7 @@ char* get_next_line(unsigned long *pos, void *file, unsigned long size)
signed char *p = (signed char *)file + *pos;
char *s = line;
- for (; *pos < size ; (*pos)++)
- {
+ for (; *pos < size ; (*pos)++) {
if (skip && isspace(*p)) {
p++;
continue;
@@ -388,7 +389,9 @@ static int parse_elf(struct elf_info *info, const char *filename)
/* Check if file offset is correct */
if (hdr->e_shoff > info->size) {
- fatal("section header offset=%lu in file '%s' is bigger then filesize=%lu\n", (unsigned long)hdr->e_shoff, filename, info->size);
+ fatal("section header offset=%lu in file '%s' is bigger than "
+ "filesize=%lu\n", (unsigned long)hdr->e_shoff,
+ filename, info->size);
return 0;
}
@@ -409,7 +412,10 @@ static int parse_elf(struct elf_info *info, const char *filename)
const char *secname;
if (sechdrs[i].sh_offset > info->size) {
- fatal("%s is truncated. sechdrs[i].sh_offset=%lu > sizeof(*hrd)=%lu\n", filename, (unsigned long)sechdrs[i].sh_offset, sizeof(*hdr));
+ fatal("%s is truncated. sechdrs[i].sh_offset=%lu > "
+ "sizeof(*hrd)=%zu\n", filename,
+ (unsigned long)sechdrs[i].sh_offset,
+ sizeof(*hdr));
return 0;
}
secname = secstrings + sechdrs[i].sh_name;
@@ -436,9 +442,9 @@ static int parse_elf(struct elf_info *info, const char *filename)
info->strtab = (void *)hdr +
sechdrs[sechdrs[i].sh_link].sh_offset;
}
- if (!info->symtab_start) {
+ if (!info->symtab_start)
fatal("%s has no symtab?\n", filename);
- }
+
/* Fix endianness in symbols */
for (sym = info->symtab_start; sym < info->symtab_stop; sym++) {
sym->st_shndx = TO_NATIVE(sym->st_shndx);
@@ -507,11 +513,13 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
#endif
if (memcmp(symname, MODULE_SYMBOL_PREFIX,
- strlen(MODULE_SYMBOL_PREFIX)) == 0)
- mod->unres = alloc_symbol(symname +
- strlen(MODULE_SYMBOL_PREFIX),
- ELF_ST_BIND(sym->st_info) == STB_WEAK,
- mod->unres);
+ strlen(MODULE_SYMBOL_PREFIX)) == 0) {
+ mod->unres =
+ alloc_symbol(symname +
+ strlen(MODULE_SYMBOL_PREFIX),
+ ELF_ST_BIND(sym->st_info) == STB_WEAK,
+ mod->unres);
+ }
break;
default:
/* All exported symbols */
@@ -580,21 +588,21 @@ static char *get_modinfo(void *modinfo, unsigned long modinfo_len,
**/
static int strrcmp(const char *s, const char *sub)
{
- int slen, sublen;
+ int slen, sublen;
if (!s || !sub)
return 1;
slen = strlen(s);
- sublen = strlen(sub);
+ sublen = strlen(sub);
if ((slen == 0) || (sublen == 0))
return 1;
- if (sublen > slen)
- return 1;
+ if (sublen > slen)
+ return 1;
- return memcmp(s + slen - sublen, sub, sublen);
+ return memcmp(s + slen - sublen, sub, sublen);
}
/*
@@ -671,7 +679,8 @@ static int data_section(const char *name)
* the pattern is identified by:
* tosec = init or exit section
* fromsec = data section
- * atsym = *driver, *_template, *_sht, *_ops, *_probe, *probe_one, *_console, *_timer
+ * atsym = *driver, *_template, *_sht, *_ops, *_probe,
+ * *probe_one, *_console, *_timer
*
* Pattern 3:
* Whitelist all refereces from .text.head to .init.data
@@ -731,15 +740,16 @@ static int secref_whitelist(const char *modname, const char *tosec,
return 1;
/* Check for pattern 2 */
- if ((init_section(tosec) || exit_section(tosec)) && data_section(fromsec))
+ if ((init_section(tosec) || exit_section(tosec))
+ && data_section(fromsec))
for (s = pat2sym; *s; s++)
if (strrcmp(atsym, *s) == 0)
return 1;
/* Check for pattern 3 */
if ((strcmp(fromsec, ".text.head") == 0) &&
- ((strcmp(tosec, ".init.data") == 0) ||
- (strcmp(tosec, ".init.text") == 0)))
+ ((strcmp(tosec, ".init.data") == 0) ||
+ (strcmp(tosec, ".init.text") == 0)))
return 1;
/* Check for pattern 4 */
@@ -816,7 +826,7 @@ static inline int is_valid_name(struct elf_info *elf, Elf_Sym *sym)
**/
static void find_symbols_between(struct elf_info *elf, Elf_Addr addr,
const char *sec,
- Elf_Sym **before, Elf_Sym **after)
+ Elf_Sym **before, Elf_Sym **after)
{
Elf_Sym *sym;
Elf_Ehdr *hdr = elf->hdr;
@@ -842,20 +852,15 @@ static void find_symbols_between(struct elf_info *elf, Elf_Addr addr,
if ((addr - sym->st_value) < beforediff) {
beforediff = addr - sym->st_value;
*before = sym;
- }
- else if ((addr - sym->st_value) == beforediff) {
+ } else if ((addr - sym->st_value) == beforediff) {
*before = sym;
}
- }
- else
- {
+ } else {
if ((sym->st_value - addr) < afterdiff) {
afterdiff = sym->st_value - addr;
*after = sym;
- }
- else if ((sym->st_value - addr) == afterdiff) {
+ } else if ((sym->st_value - addr) == afterdiff)
*after = sym;
- }
}
}
}
@@ -952,12 +957,14 @@ static int addend_arm_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
switch (r_typ) {
case R_ARM_ABS32:
/* From ARM ABI: (S + A) | T */
- r->r_addend = (int)(long)(elf->symtab_start + ELF_R_SYM(r->r_info));
+ r->r_addend = (int)(long)
+ (elf->symtab_start + ELF_R_SYM(r->r_info));
break;
case R_ARM_PC24:
/* From ARM ABI: ((S + A) | T) - P */
- r->r_addend = (int)(long)(elf->hdr + elf->sechdrs[rsection].sh_offset +
- (r->r_offset - elf->sechdrs[rsection].sh_addr));
+ r->r_addend = (int)(long)(elf->hdr +
+ elf->sechdrs[rsection].sh_offset +
+ (r->r_offset - elf->sechdrs[rsection].sh_addr));
break;
default:
return 1;
@@ -1002,7 +1009,7 @@ static int addend_mips_rel(struct elf_info *elf, int rsection, Elf_Rela *r)
**/
static void check_sec_ref(struct module *mod, const char *modname,
struct elf_info *elf,
- int section(const char*),
+ int section(const char *),
int section_ref_ok(const char *))
{
int i;
@@ -1022,7 +1029,7 @@ static void check_sec_ref(struct module *mod, const char *modname,
if (sechdrs[i].sh_type == SHT_RELA) {
Elf_Rela *rela;
Elf_Rela *start = (void *)hdr + sechdrs[i].sh_offset;
- Elf_Rela *stop = (void*)start + sechdrs[i].sh_size;
+ Elf_Rela *stop = (void *)start + sechdrs[i].sh_size;
name += strlen(".rela");
if (section_ref_ok(name))
continue;
@@ -1059,7 +1066,7 @@ static void check_sec_ref(struct module *mod, const char *modname,
} else if (sechdrs[i].sh_type == SHT_REL) {
Elf_Rel *rel;
Elf_Rel *start = (void *)hdr + sechdrs[i].sh_offset;
- Elf_Rel *stop = (void*)start + sechdrs[i].sh_size;
+ Elf_Rel *stop = (void *)start + sechdrs[i].sh_size;
name += strlen(".rel");
if (section_ref_ok(name))
continue;
@@ -1088,7 +1095,7 @@ static void check_sec_ref(struct module *mod, const char *modname,
continue;
break;
case EM_ARM:
- if(addend_arm_rel(elf, i, &r))
+ if (addend_arm_rel(elf, i, &r))
continue;
break;
case EM_MIPS:
@@ -1126,32 +1133,32 @@ static int initexit_section_ref_ok(const char *name)
const char **s;
/* Absolute section names */
const char *namelist1[] = {
- "__bug_table", /* used by powerpc for BUG() */
+ "__bug_table", /* used by powerpc for BUG() */
"__ex_table",
".altinstructions",
- ".cranges", /* used by sh64 */
+ ".cranges", /* used by sh64 */
".fixup",
- ".machvec", /* ia64 + powerpc uses these */
+ ".machvec", /* ia64 + powerpc uses these */
".machine.desc",
- ".opd", /* See comment [OPD] */
+ ".opd", /* See comment [OPD] */
"__dbe_table",
".parainstructions",
".pdr",
- ".plt", /* seen on ARCH=um build on x86_64. Harmless */
+ ".plt", /* seen on ARCH=um build on x86_64. Harmless */
".smp_locks",
".stab",
".m68k_fixup",
- ".xt.prop", /* xtensa informational section */
- ".xt.lit", /* xtensa informational section */
+ ".xt.prop", /* xtensa informational section */
+ ".xt.lit", /* xtensa informational section */
NULL
};
/* Start of section names */
const char *namelist2[] = {
".debug",
".eh_frame",
- ".note", /* ignore ELF notes - may contain anything */
- ".got", /* powerpc - global offset table */
- ".toc", /* powerpc - table of contents */
+ ".note", /* ignore ELF notes - may contain anything */
+ ".got", /* powerpc - global offset table */
+ ".toc", /* powerpc - table of contents */
NULL
};
/* part of section name */
@@ -1221,7 +1228,8 @@ static int init_section_ref_ok(const char *name)
return 1;
/* If section name ends with ".init" we allow references
- * as is the case with .initcallN.init, .early_param.init, .taglist.init etc
+ * as is the case with .initcallN.init, .early_param.init,
+ * .taglist.init etc
*/
if (strrcmp(name, ".init") == 0)
return 1;
@@ -1368,7 +1376,7 @@ static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
}
}
-static void check_for_unused(enum export exp, const char* m, const char* s)
+static void check_for_unused(enum export exp, const char *m, const char *s)
{
const char *e = is_vmlinux(m) ?"":".ko";
@@ -1401,7 +1409,7 @@ static void check_exports(struct module *mod)
if (!mod->gpl_compatible)
check_for_gpl_usage(exp->export, basename, exp->name);
check_for_unused(exp->export, basename, exp->name);
- }
+ }
}
/**
@@ -1465,9 +1473,8 @@ static int add_versions(struct buffer *b, struct module *mod)
buf_printf(b, "__attribute__((section(\"__versions\"))) = {\n");
for (s = mod->unres; s; s = s->next) {
- if (!s->module) {
+ if (!s->module)
continue;
- }
if (!s->crc_valid) {
warn("\"%s\" [%s.ko] has no CRC!\n",
s->name, mod->name);
@@ -1488,9 +1495,8 @@ static void add_depends(struct buffer *b, struct module *mod,
struct module *m;
int first = 1;
- for (m = modules; m; m = m->next) {
+ for (m = modules; m; m = m->next)
m->seen = is_vmlinux(m->name);
- }
buf_printf(b, "\n");
buf_printf(b, "static const char __module_depends[]\n");
@@ -1506,7 +1512,8 @@ static void add_depends(struct buffer *b, struct module *mod,
continue;
s->module->seen = 1;
- if ((p = strrchr(s->module->name, '/')) != NULL)
+ p = strrchr(s->module->name, '/');
+ if (p)
p++;
else
p = s->module->name;
@@ -1578,7 +1585,7 @@ static void read_dump(const char *fname, unsigned int kernel)
void *file = grab_file(fname, &size);
char *line;
- if (!file)
+ if (!file)
/* No symbol versions, silently ignore */
return;
@@ -1601,11 +1608,10 @@ static void read_dump(const char *fname, unsigned int kernel)
crc = strtoul(line, &d, 16);
if (*symname == '\0' || *modname == '\0' || *d != '\0')
goto fail;
-
- if (!(mod = find_module(modname))) {
- if (is_vmlinux(modname)) {
+ mod = find_module(modname);
+ if (!mod) {
+ if (is_vmlinux(modname))
have_vmlinux = 1;
- }
mod = new_module(NOFAIL(strdup(modname)));
mod->skip = 1;
}
@@ -1662,31 +1668,31 @@ int main(int argc, char **argv)
int err;
while ((opt = getopt(argc, argv, "i:I:mso:aw")) != -1) {
- switch(opt) {
- case 'i':
- kernel_read = optarg;
- break;
- case 'I':
- module_read = optarg;
- external_module = 1;
- break;
- case 'm':
- modversions = 1;
- break;
- case 'o':
- dump_write = optarg;
- break;
- case 'a':
- all_versions = 1;
- break;
- case 's':
- vmlinux_section_warnings = 0;
- break;
- case 'w':
- warn_unresolved = 1;
- break;
- default:
- exit(1);
+ switch (opt) {
+ case 'i':
+ kernel_read = optarg;
+ break;
+ case 'I':
+ module_read = optarg;
+ external_module = 1;
+ break;
+ case 'm':
+ modversions = 1;
+ break;
+ case 'o':
+ dump_write = optarg;
+ break;
+ case 'a':
+ all_versions = 1;
+ break;
+ case 's':
+ vmlinux_section_warnings = 0;
+ break;
+ case 'w':
+ warn_unresolved = 1;
+ break;
+ default:
+ exit(1);
}
}
@@ -1695,9 +1701,8 @@ int main(int argc, char **argv)
if (module_read)
read_dump(module_read, 0);
- while (optind < argc) {
+ while (optind < argc)
read_symbols(argv[optind++]);
- }
for (mod = modules; mod; mod = mod->next) {
if (mod->skip)
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-16 07:48:35 +0000