diff options
Diffstat (limited to 'target/linux/generic/hack-4.19/204-module_strip.patch')
| -rw-r--r-- | target/linux/generic/hack-4.19/204-module_strip.patch | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/target/linux/generic/hack-4.19/204-module_strip.patch b/target/linux/generic/hack-4.19/204-module_strip.patch new file mode 100644 index 0000000000..db65062fcf --- /dev/null +++ b/target/linux/generic/hack-4.19/204-module_strip.patch @@ -0,0 +1,208 @@ +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 +@@ -158,6 +158,7 @@ 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) +@@ -201,12 +202,12 @@ 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 \ +@@ -233,7 +234,9 @@ 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) \ + static struct module_version_attribute ___modver_attr = { \ +@@ -255,7 +258,7 @@ 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) + + struct notifier_block; + +--- a/include/linux/moduleparam.h ++++ b/include/linux/moduleparam.h +@@ -17,6 +17,16 @@ + /* 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)[] \ +@@ -24,8 +34,7 @@ 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) +@@ -33,7 +42,7 @@ 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 +@@ -1903,6 +1903,13 @@ config TRIM_UNUSED_KSYMS + + If unsure, or if you need to build out-of-tree modules, say N. + ++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 +@@ -3006,9 +3006,11 @@ static struct module *setup_load_info(st + + 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; + +@@ -3029,6 +3031,7 @@ 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 +@@ -1982,7 +1982,9 @@ static void read_symbols(char *modname) + symname = remove_dot(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)) +@@ -2143,8 +2145,10 @@ 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"); + 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, "__attribute__((section(\".gnu.linkonce.this_module\"))) = {\n"); +@@ -2161,8 +2165,10 @@ 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 */ +@@ -2175,10 +2181,12 @@ static void add_retpoline(struct buffer + + 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 + } + + /** +@@ -2277,11 +2285,13 @@ 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) +@@ -2518,7 +2528,9 @@ 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); |