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authorRusty Russell <rusty@rustcorp.com.au>2009-03-31 13:05:34 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-03-31 13:05:34 +1030
commit8c8ef42aee8fcfb4128bb94c50d55c9f80ade525 (patch)
tree58141fdd1afc0887dcc3cb91ab4c7609df0963e7
parent9cb610d8e35fe3ec95a2fe2030b02f85aeea83c1 (diff)
module: include other structures in module version check
With CONFIG_MODVERSIONS, we version 'struct module' using a dummy export, but other things matter too: 1) 'struct modversion_info' determines the layout of the __versions section, 2) 'struct kernel_param' determines the layout of the __params section, 3) 'struct kernel_symbol' determines __ksymtab*. 4) 'struct marker' determines __markers. 5) 'struct tracepoint' determines __tracepoints. So we rename 'struct_module' to 'module_layout' and include these in the signature. Now it's general we can add others later on without confusion. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--kernel/module.c18
-rw-r--r--scripts/mod/modpost.c4
2 files changed, 15 insertions, 7 deletions
diff --git a/kernel/module.c b/kernel/module.c
index 784bf6d8f8c4..e8cf636e614b 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1052,9 +1052,9 @@ static inline int check_modstruct_version(Elf_Shdr *sechdrs,
{
const unsigned long *crc;
- if (!find_symbol("struct_module", NULL, &crc, true, false))
+ if (!find_symbol("module_layout", NULL, &crc, true, false))
BUG();
- return check_version(sechdrs, versindex, "struct_module", mod, crc);
+ return check_version(sechdrs, versindex, "module_layout", mod, crc);
}
/* First part is kernel version, which we ignore if module has crcs. */
@@ -2858,9 +2858,17 @@ void print_modules(void)
}
#ifdef CONFIG_MODVERSIONS
-/* Generate the signature for struct module here, too, for modversions. */
-void struct_module(struct module *mod) { return; }
-EXPORT_SYMBOL(struct_module);
+/* Generate the signature for all relevant module structures here.
+ * If these change, we don't want to try to parse the module. */
+void module_layout(struct module *mod,
+ struct modversion_info *ver,
+ struct kernel_param *kp,
+ struct kernel_symbol *ks,
+ struct marker *marker,
+ struct tracepoint *tp)
+{
+}
+EXPORT_SYMBOL(module_layout);
#endif
#ifdef CONFIG_MARKERS
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 7e62303133dc..8cc70612984c 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1607,12 +1607,12 @@ static void read_symbols(char *modname)
parse_elf_finish(&info);
- /* Our trick to get versioning for struct_module - it's
+ /* Our trick to get versioning for module struct etc. - it's
* never passed as an argument to an exported function, so
* the automatic versioning doesn't pick it up, but it's really
* important anyhow */
if (modversions)
- mod->unres = alloc_symbol("struct_module", 0, mod->unres);
+ mod->unres = alloc_symbol("module_layout", 0, mod->unres);
}
#define SZ 500