mirror of https://github.com/hak5/openwrt.git
201 lines
7.0 KiB
Diff
201 lines
7.0 KiB
Diff
From: Felix Fietkau <nbd@openwrt.org>
|
|
Subject: [PATCH] build: add a hack for removing non-essential module info
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
|
|
---
|
|
--- a/include/linux/module.h
|
|
+++ b/include/linux/module.h
|
|
@@ -82,7 +82,7 @@ void sort_extable(struct exception_table
|
|
void sort_main_extable(void);
|
|
void trim_init_extable(struct module *m);
|
|
|
|
-#ifdef MODULE
|
|
+#if defined(MODULE) && !defined(CONFIG_MODULE_STRIPPED)
|
|
#define MODULE_GENERIC_TABLE(gtype,name) \
|
|
extern const struct gtype##_id __mod_##gtype##_table \
|
|
__attribute__ ((unused, alias(__stringify(name))))
|
|
@@ -93,9 +93,10 @@ extern const struct gtype##_id __mod_##g
|
|
|
|
/* Generic info of form tag = "info" */
|
|
#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
|
|
+#define MODULE_INFO_STRIP(tag, info) __MODULE_INFO_STRIP(tag, tag, info)
|
|
|
|
/* For userspace: you can also call me... */
|
|
-#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
|
|
+#define MODULE_ALIAS(_alias) MODULE_INFO_STRIP(alias, _alias)
|
|
|
|
/*
|
|
* The following license idents are currently accepted as indicating free
|
|
@@ -131,10 +132,10 @@ extern const struct gtype##_id __mod_##g
|
|
* Author(s), use "Name <email>" or just "Name", for multiple
|
|
* authors use multiple MODULE_AUTHOR() statements/lines.
|
|
*/
|
|
-#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
|
|
+#define MODULE_AUTHOR(_author) MODULE_INFO_STRIP(author, _author)
|
|
|
|
/* What your module does. */
|
|
-#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
|
|
+#define MODULE_DESCRIPTION(_description) MODULE_INFO_STRIP(description, _description)
|
|
|
|
#define MODULE_DEVICE_TABLE(type,name) \
|
|
MODULE_GENERIC_TABLE(type##_device,name)
|
|
@@ -155,7 +156,9 @@ extern const struct gtype##_id __mod_##g
|
|
*/
|
|
|
|
#if defined(MODULE) || !defined(CONFIG_SYSFS)
|
|
-#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
|
|
+#define MODULE_VERSION(_version) MODULE_INFO_STRIP(version, _version)
|
|
+#elif defined(CONFIG_MODULE_STRIPPED)
|
|
+#define MODULE_VERSION(_version) __MODULE_INFO_DISABLED(version)
|
|
#else
|
|
#define MODULE_VERSION(_version) \
|
|
static struct module_version_attribute ___modver_attr = { \
|
|
@@ -177,7 +180,7 @@ extern const struct gtype##_id __mod_##g
|
|
/* Optional firmware file (or files) needed by the module
|
|
* format is simply firmware file name. Multiple firmware
|
|
* files require multiple MODULE_FIRMWARE() specifiers */
|
|
-#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
|
|
+#define MODULE_FIRMWARE(_firmware) MODULE_INFO_STRIP(firmware, _firmware)
|
|
|
|
/* Given an address, look for it in the exception tables */
|
|
const struct exception_table_entry *search_exception_tables(unsigned long add);
|
|
--- a/include/linux/moduleparam.h
|
|
+++ b/include/linux/moduleparam.h
|
|
@@ -16,6 +16,16 @@
|
|
/* Chosen so that structs with an unsigned long line up. */
|
|
#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))
|
|
|
|
+/* This struct is here for syntactic coherency, it is not used */
|
|
+#define __MODULE_INFO_DISABLED(name) \
|
|
+ struct __UNIQUE_ID(name) {}
|
|
+
|
|
+#ifdef CONFIG_MODULE_STRIPPED
|
|
+#define __MODULE_INFO_STRIP(tag, name, info) __MODULE_INFO_DISABLED(name)
|
|
+#else
|
|
+#define __MODULE_INFO_STRIP(tag, name, info) __MODULE_INFO(tag, name, info)
|
|
+#endif
|
|
+
|
|
#ifdef MODULE
|
|
#define __MODULE_INFO(tag, name, info) \
|
|
static const char __UNIQUE_ID(name)[] \
|
|
@@ -23,8 +33,7 @@ static const char __UNIQUE_ID(name)[]
|
|
= __stringify(tag) "=" info
|
|
#else /* !MODULE */
|
|
/* This struct is here for syntactic coherency, it is not used */
|
|
-#define __MODULE_INFO(tag, name, info) \
|
|
- struct __UNIQUE_ID(name) {}
|
|
+#define __MODULE_INFO(tag, name, info) __MODULE_INFO_DISABLED(name)
|
|
#endif
|
|
#define __MODULE_PARM_TYPE(name, _type) \
|
|
__MODULE_INFO(parmtype, name##type, #name ":" _type)
|
|
@@ -32,7 +41,7 @@ static const char __UNIQUE_ID(name)[]
|
|
/* One for each parameter, describing how to use it. Some files do
|
|
multiple of these per line, so can't just use MODULE_INFO. */
|
|
#define MODULE_PARM_DESC(_parm, desc) \
|
|
- __MODULE_INFO(parm, _parm, #_parm ":" desc)
|
|
+ __MODULE_INFO_STRIP(parm, _parm, #_parm ":" desc)
|
|
|
|
struct kernel_param;
|
|
|
|
--- a/init/Kconfig
|
|
+++ b/init/Kconfig
|
|
@@ -1783,6 +1783,13 @@ config MODULE_SIG_HASH
|
|
default "sha384" if MODULE_SIG_SHA384
|
|
default "sha512" if MODULE_SIG_SHA512
|
|
|
|
+config MODULE_STRIPPED
|
|
+ bool "Reduce module size"
|
|
+ depends on MODULES
|
|
+ help
|
|
+ Remove module parameter descriptions, author info, version, aliases,
|
|
+ device tables, etc.
|
|
+
|
|
endif # MODULES
|
|
|
|
config INIT_ALL_POSSIBLE
|
|
--- a/kernel/module.c
|
|
+++ b/kernel/module.c
|
|
@@ -2690,6 +2690,7 @@ static struct module *setup_load_info(st
|
|
|
|
static int check_modinfo(struct module *mod, struct load_info *info, int flags)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
const char *modmagic = get_modinfo(info, "vermagic");
|
|
int err;
|
|
|
|
@@ -2716,6 +2717,7 @@ static int check_modinfo(struct module *
|
|
" the quality is unknown, you have been warned.\n",
|
|
mod->name);
|
|
}
|
|
+#endif
|
|
|
|
/* Set up license info based on the info section */
|
|
set_license(mod, get_modinfo(info, "license"));
|
|
--- a/scripts/mod/modpost.c
|
|
+++ b/scripts/mod/modpost.c
|
|
@@ -1744,7 +1744,9 @@ static void read_symbols(char *modname)
|
|
symname = info.strtab + sym->st_name;
|
|
|
|
handle_modversions(mod, &info, sym, symname);
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
handle_moddevtable(mod, &info, sym, symname);
|
|
+#endif
|
|
}
|
|
if (!is_vmlinux(modname) ||
|
|
(is_vmlinux(modname) && vmlinux_section_warnings))
|
|
@@ -1888,7 +1890,9 @@ static void add_header(struct buffer *b,
|
|
buf_printf(b, "#include <linux/vermagic.h>\n");
|
|
buf_printf(b, "#include <linux/compiler.h>\n");
|
|
buf_printf(b, "\n");
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\n");
|
|
+#endif
|
|
buf_printf(b, "\n");
|
|
buf_printf(b, "struct module __this_module\n");
|
|
buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = {\n");
|
|
@@ -1905,16 +1909,20 @@ static void add_header(struct buffer *b,
|
|
|
|
static void add_intree_flag(struct buffer *b, int is_intree)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
if (is_intree)
|
|
buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n");
|
|
+#endif
|
|
}
|
|
|
|
static void add_staging_flag(struct buffer *b, const char *name)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
static const char *staging_dir = "drivers/staging";
|
|
|
|
if (strncmp(staging_dir, name, strlen(staging_dir)) == 0)
|
|
buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
|
|
+#endif
|
|
}
|
|
|
|
/**
|
|
@@ -2007,11 +2015,13 @@ static void add_depends(struct buffer *b
|
|
|
|
static void add_srcversion(struct buffer *b, struct module *mod)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
if (mod->srcversion[0]) {
|
|
buf_printf(b, "\n");
|
|
buf_printf(b, "MODULE_INFO(srcversion, \"%s\");\n",
|
|
mod->srcversion);
|
|
}
|
|
+#endif
|
|
}
|
|
|
|
static void write_if_changed(struct buffer *b, const char *fname)
|
|
@@ -2237,7 +2247,9 @@ int main(int argc, char **argv)
|
|
add_staging_flag(&buf, mod->name);
|
|
err |= add_versions(&buf, mod);
|
|
add_depends(&buf, mod, modules);
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
add_moddevtable(&buf, mod);
|
|
+#endif
|
|
add_srcversion(&buf, mod);
|
|
|
|
sprintf(fname, "%s.mod.c", mod->name);
|