mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
49cb5e501a
Use 'make target/linux/refresh' to refresh hack patches. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
213 lines
6.9 KiB
Diff
213 lines
6.9 KiB
Diff
From a779a482fb9b9f8fcdf8b2519c789b4b9bb5dd05 Mon Sep 17 00:00:00 2001
|
|
From: Felix Fietkau <nbd@nbd.name>
|
|
Date: Fri, 7 Jul 2017 16:56:48 +0200
|
|
Subject: build: add a hack for removing non-essential module info
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
include/linux/module.h | 13 ++++++++-----
|
|
include/linux/moduleparam.h | 15 ++++++++++++---
|
|
init/Kconfig | 7 +++++++
|
|
kernel/module.c | 5 ++++-
|
|
scripts/mod/modpost.c | 12 ++++++++++++
|
|
5 files changed, 43 insertions(+), 9 deletions(-)
|
|
|
|
--- a/include/linux/module.h
|
|
+++ b/include/linux/module.h
|
|
@@ -164,6 +164,7 @@ extern void cleanup_module(void);
|
|
|
|
/* 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)
|
|
@@ -233,12 +234,12 @@ extern void cleanup_module(void);
|
|
* 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)
|
|
|
|
-#ifdef MODULE
|
|
+#if defined(MODULE) && !defined(CONFIG_MODULE_STRIPPED)
|
|
/* Creates an alias so file2alias.c can find device table. */
|
|
#define MODULE_DEVICE_TABLE(type, name) \
|
|
extern typeof(name) __mod_##type##__##name##_device_table \
|
|
@@ -265,7 +266,9 @@ extern typeof(name) __mod_##type##__##na
|
|
*/
|
|
|
|
#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) \
|
|
MODULE_INFO(version, _version); \
|
|
@@ -288,7 +291,7 @@ extern typeof(name) __mod_##type##__##na
|
|
/* 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)
|
|
|
|
#define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, #ns)
|
|
|
|
--- a/include/linux/moduleparam.h
|
|
+++ b/include/linux/moduleparam.h
|
|
@@ -20,6 +20,16 @@
|
|
/* 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
|
|
+
|
|
#define __MODULE_INFO(tag, name, info) \
|
|
static const char __UNIQUE_ID(name)[] \
|
|
__used __section(".modinfo") __aligned(1) \
|
|
@@ -31,7 +41,7 @@
|
|
/* 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
|
|
@@ -2347,6 +2347,13 @@ config UNUSED_KSYMS_WHITELIST
|
|
one per line. The path can be absolute, or relative to the kernel
|
|
source tree.
|
|
|
|
+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 MODULES_TREE_LOOKUP
|
|
--- a/kernel/module.c
|
|
+++ b/kernel/module.c
|
|
@@ -1218,6 +1218,7 @@ static struct module_attribute *modinfo_
|
|
|
|
static const char vermagic[] = VERMAGIC_STRING;
|
|
|
|
+#if defined(CONFIG_MODVERSIONS) || !defined(CONFIG_MODULE_STRIPPED)
|
|
static int try_to_force_load(struct module *mod, const char *reason)
|
|
{
|
|
#ifdef CONFIG_MODULE_FORCE_LOAD
|
|
@@ -1229,6 +1230,7 @@ static int try_to_force_load(struct modu
|
|
return -ENOEXEC;
|
|
#endif
|
|
}
|
|
+#endif
|
|
|
|
#ifdef CONFIG_MODVERSIONS
|
|
|
|
@@ -3227,9 +3229,11 @@ static int setup_load_info(struct load_i
|
|
|
|
static int check_modinfo(struct module *mod, struct load_info *info, int flags)
|
|
{
|
|
- const char *modmagic = get_modinfo(info, "vermagic");
|
|
int err;
|
|
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
+ const char *modmagic = get_modinfo(info, "vermagic");
|
|
+
|
|
if (flags & MODULE_INIT_IGNORE_VERMAGIC)
|
|
modmagic = NULL;
|
|
|
|
@@ -3250,6 +3254,7 @@ static int check_modinfo(struct module *
|
|
mod->name);
|
|
add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK);
|
|
}
|
|
+#endif
|
|
|
|
check_modinfo_retpoline(mod, info);
|
|
|
|
--- a/scripts/mod/modpost.c
|
|
+++ b/scripts/mod/modpost.c
|
|
@@ -2033,7 +2033,9 @@ static void read_symbols(const char *mod
|
|
symname = remove_dot(info.strtab + sym->st_name);
|
|
|
|
handle_symbol(mod, &info, sym, symname);
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
handle_moddevtable(mod, &info, sym, symname);
|
|
+#endif
|
|
}
|
|
|
|
for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
|
|
@@ -2212,8 +2214,10 @@ static void add_header(struct buffer *b,
|
|
buf_printf(b, "BUILD_SALT;\n");
|
|
buf_printf(b, "BUILD_LTO_INFO;\n");
|
|
buf_printf(b, "\n");
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\n");
|
|
buf_printf(b, "MODULE_INFO(name, KBUILD_MODNAME);\n");
|
|
+#endif
|
|
buf_printf(b, "\n");
|
|
buf_printf(b, "__visible struct module __this_module\n");
|
|
buf_printf(b, "__section(\".gnu.linkonce.this_module\") = {\n");
|
|
@@ -2230,8 +2234,10 @@ 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
|
|
}
|
|
|
|
/* Cannot check for assembler */
|
|
@@ -2244,8 +2250,10 @@ static void add_retpoline(struct buffer
|
|
|
|
static void add_staging_flag(struct buffer *b, const char *name)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
if (strstarts(name, "drivers/staging"))
|
|
buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
|
|
+#endif
|
|
}
|
|
|
|
/**
|
|
@@ -2325,11 +2333,13 @@ 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_buf(struct buffer *b, const char *fname)
|
|
@@ -2578,7 +2588,9 @@ int main(int argc, char **argv)
|
|
add_staging_flag(&buf, mod->name);
|
|
add_versions(&buf, mod);
|
|
add_depends(&buf, mod);
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
add_moddevtable(&buf, mod);
|
|
+#endif
|
|
add_srcversion(&buf, mod);
|
|
|
|
sprintf(fname, "%s.mod.c", mod->name);
|