diff options
Diffstat (limited to 'target/linux/generic/hack-6.1/204-module_strip.patch')
| -rw-r--r-- | target/linux/generic/hack-6.1/204-module_strip.patch | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/target/linux/generic/hack-6.1/204-module_strip.patch b/target/linux/generic/hack-6.1/204-module_strip.patch new file mode 100644 index 00000000000..bd168649f2e --- /dev/null +++ b/target/linux/generic/hack-6.1/204-module_strip.patch @@ -0,0 +1,210 @@ +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 +@@ -163,6 +163,7 @@ 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) +@@ -232,12 +233,12 @@ 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 \ +@@ -264,7 +265,9 @@ 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); \ +@@ -287,7 +290,7 @@ 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, __stringify(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/kernel/module/Kconfig ++++ b/kernel/module/Kconfig +@@ -290,4 +290,11 @@ config MODULES_TREE_LOOKUP + def_bool y + depends on PERF_EVENTS || TRACING || CFI_CLANG + ++config MODULE_STRIPPED ++ bool "Reduce module size" ++ depends on MODULES ++ help ++ Remove module parameter descriptions, author info, version, aliases, ++ device tables, etc. ++ + endif # MODULES +--- a/kernel/module/main.c ++++ b/kernel/module/main.c +@@ -988,6 +988,7 @@ size_t modinfo_attrs_count = ARRAY_SIZE( + + static const char vermagic[] = VERMAGIC_STRING; + ++#if defined(CONFIG_MODVERSIONS) || !defined(CONFIG_MODULE_STRIPPED) + int try_to_force_load(struct module *mod, const char *reason) + { + #ifdef CONFIG_MODULE_FORCE_LOAD +@@ -999,6 +1000,7 @@ int try_to_force_load(struct module *mod + return -ENOEXEC; + #endif + } ++#endif + + static char *get_modinfo(const struct load_info *info, const char *tag); + static char *get_next_modinfo(const struct load_info *info, const char *tag, +@@ -1958,9 +1960,11 @@ 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; + +@@ -1981,6 +1985,7 @@ 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 +@@ -1781,7 +1781,9 @@ 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++) { +@@ -1944,8 +1946,10 @@ 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"); +@@ -1959,8 +1963,10 @@ static void add_header(struct buffer *b, + buf_printf(b, "\t.arch = MODULE_ARCH_INIT,\n"); + buf_printf(b, "};\n"); + ++#ifndef CONFIG_MODULE_STRIPPED + if (!external_module) + buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n"); ++#endif + + buf_printf(b, + "\n" +@@ -1968,8 +1974,10 @@ static void add_header(struct buffer *b, + "MODULE_INFO(retpoline, \"Y\");\n" + "#endif\n"); + ++#ifndef CONFIG_MODULE_STRIPPED + if (strstarts(mod->name, "drivers/staging")) + buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n"); ++#endif + + if (strstarts(mod->name, "tools/testing")) + buf_printf(b, "\nMODULE_INFO(test, \"Y\");\n"); +@@ -2065,11 +2073,13 @@ 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) +@@ -2155,7 +2165,9 @@ static void write_mod_c_file(struct modu + add_exported_symbols(&buf, mod); + add_versions(&buf, mod); + add_depends(&buf, mod); ++#ifndef CONFIG_MODULE_STRIPPED + add_moddevtable(&buf, mod); ++#endif + add_srcversion(&buf, mod); + + ret = snprintf(fname, sizeof(fname), "%s.mod.c", mod->name); |