diff options
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | arch/Kconfig | 6 | ||||
| -rw-r--r-- | arch/blackfin/Kconfig | 5 | ||||
| -rw-r--r-- | arch/h8300/Kconfig | 5 | ||||
| -rw-r--r-- | arch/metag/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/mtd/chips/gen_probe.c | 8 | ||||
| -rw-r--r-- | include/asm-generic/unistd.h | 12 | ||||
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 8 | ||||
| -rw-r--r-- | include/linux/export.h | 20 | ||||
| -rw-r--r-- | include/linux/kernel.h | 7 | ||||
| -rw-r--r-- | include/linux/module.h | 4 | ||||
| -rw-r--r-- | kernel/modsign_certificate.S | 13 | ||||
| -rw-r--r-- | kernel/module.c | 2 | ||||
| -rw-r--r-- | scripts/Makefile.lib | 7 | ||||
| -rw-r--r-- | scripts/link-vmlinux.sh | 5 | ||||
| -rw-r--r-- | scripts/mod/modpost.c | 36 |
16 files changed, 57 insertions, 88 deletions
@@ -1398,7 +1398,7 @@ quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)) # Run depmod only if we have System.map and depmod is executable quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ - $(KERNELRELEASE) "$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))" + $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" # Create temporary dir for module support files # clean it up only when building all modules diff --git a/arch/Kconfig b/arch/Kconfig index 1455579791ec..7b433a4bcc28 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -384,6 +384,12 @@ config MODULES_USE_ELF_REL Modules only use ELF REL relocations. Modules with ELF RELA relocations will give an error. +config HAVE_UNDERSCORE_SYMBOL_PREFIX + bool + help + Some architectures generate an _ in front of C symbols; things like + module loading and assembly files need to know about this. + # # ABI hall of shame # diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index c3f2e0bc644a..453ebe46b065 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -1,7 +1,3 @@ -config SYMBOL_PREFIX - string - default "_" - config MMU def_bool n @@ -33,6 +29,7 @@ config BLACKFIN select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_WANT_OPTIONAL_GPIOLIB select HAVE_UID16 + select HAVE_UNDERSCORE_SYMBOL_PREFIX select VIRT_TO_BUS select ARCH_WANT_IPC_PARSE_VERSION select HAVE_GENERIC_HARDIRQS diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 79250de1b12a..303e4f9a79d1 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -12,10 +12,7 @@ config H8300 select MODULES_USE_ELF_RELA select OLD_SIGSUSPEND3 select OLD_SIGACTION - -config SYMBOL_PREFIX - string - default "_" + select HAVE_UNDERSCORE_SYMBOL_PREFIX config MMU bool diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig index afc8973d1488..2099617e3ec0 100644 --- a/arch/metag/Kconfig +++ b/arch/metag/Kconfig @@ -1,7 +1,3 @@ -config SYMBOL_PREFIX - string - default "_" - config METAG def_bool y select EMBEDDED @@ -27,6 +23,7 @@ config METAG select HAVE_MOD_ARCH_SPECIFIC select HAVE_PERF_EVENTS select HAVE_SYSCALL_TRACEPOINTS + select HAVE_UNDERSCORE_SYMBOL_PREFIX select IRQ_DOMAIN select MODULES_USE_ELF_RELA select OF diff --git a/drivers/mtd/chips/gen_probe.c b/drivers/mtd/chips/gen_probe.c index 3b9a2843c5f8..74dbb6bcf488 100644 --- a/drivers/mtd/chips/gen_probe.c +++ b/drivers/mtd/chips/gen_probe.c @@ -204,14 +204,16 @@ static inline struct mtd_info *cfi_cmdset_unknown(struct map_info *map, struct cfi_private *cfi = map->fldrv_priv; __u16 type = primary?cfi->cfiq->P_ID:cfi->cfiq->A_ID; #ifdef CONFIG_MODULES - char probename[16+sizeof(MODULE_SYMBOL_PREFIX)]; + char probename[sizeof(VMLINUX_SYMBOL_STR(cfi_cmdset_%4.4X))]; cfi_cmdset_fn_t *probe_function; - sprintf(probename, MODULE_SYMBOL_PREFIX "cfi_cmdset_%4.4X", type); + sprintf(probename, VMLINUX_SYMBOL_STR(cfi_cmdset_%4.4X), type); probe_function = __symbol_get(probename); if (!probe_function) { - request_module(probename + sizeof(MODULE_SYMBOL_PREFIX) - 1); + char modname[sizeof("cfi_cmdset_%4.4X")]; + sprintf(modname, "cfi_cmdset_%4.4X", type); + request_module(modname); probe_function = __symbol_get(probename); } diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h index 4077b5d9ff81..15c0598e1109 100644 --- a/include/asm-generic/unistd.h +++ b/include/asm-generic/unistd.h @@ -1,4 +1,5 @@ #include <uapi/asm-generic/unistd.h> +#include <linux/export.h> /* * These are required system calls, we should @@ -17,12 +18,7 @@ * but it doesn't work on all toolchains, so we just do it by hand */ #ifndef cond_syscall -#ifdef CONFIG_SYMBOL_PREFIX -#define __SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX -#else -#define __SYMBOL_PREFIX -#endif -#define cond_syscall(x) asm(".weak\t" __SYMBOL_PREFIX #x "\n\t" \ - ".set\t" __SYMBOL_PREFIX #x "," \ - __SYMBOL_PREFIX "sys_ni_syscall") +#define cond_syscall(x) asm(".weak\t" VMLINUX_SYMBOL_STR(x) "\n\t" \ + ".set\t" VMLINUX_SYMBOL_STR(x) "," \ + VMLINUX_SYMBOL_STR(sys_ni_syscall)) #endif diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index afa12c7a025c..eb58d2d7d971 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -52,13 +52,7 @@ #define LOAD_OFFSET 0 #endif -#ifndef SYMBOL_PREFIX -#define VMLINUX_SYMBOL(sym) sym -#else -#define PASTE2(x,y) x##y -#define PASTE(x,y) PASTE2(x,y) -#define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym) -#endif +#include <linux/export.h> /* Align . to a 8 byte boundary equals to maximum function alignment. */ #define ALIGN_FUNCTION() . = ALIGN(8) diff --git a/include/linux/export.h b/include/linux/export.h index 696c0f48afc7..412cd509effe 100644 --- a/include/linux/export.h +++ b/include/linux/export.h @@ -5,17 +5,24 @@ * to reduce the amount of pointless cruft we feed to gcc when only * exporting a simple symbol or two. * - * If you feel the need to add #include <linux/foo.h> to this file - * then you are doing something wrong and should go away silently. + * Try not to add #includes here. It slows compilation and makes kernel + * hackers place grumpy comments in header files. */ /* Some toolchains use a `_' prefix for all user symbols. */ -#ifdef CONFIG_SYMBOL_PREFIX -#define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX +#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX +#define __VMLINUX_SYMBOL(x) _##x +#define __VMLINUX_SYMBOL_STR(x) "_" #x #else -#define MODULE_SYMBOL_PREFIX "" +#define __VMLINUX_SYMBOL(x) x +#define __VMLINUX_SYMBOL_STR(x) #x #endif +/* Indirect, so macros are expanded before pasting. */ +#define VMLINUX_SYMBOL(x) __VMLINUX_SYMBOL(x) +#define VMLINUX_SYMBOL_STR(x) __VMLINUX_SYMBOL_STR(x) + +#ifndef __ASSEMBLY__ struct kernel_symbol { unsigned long value; @@ -51,7 +58,7 @@ extern struct module __this_module; __CRC_SYMBOL(sym, sec) \ static const char __kstrtab_##sym[] \ __attribute__((section("__ksymtab_strings"), aligned(1))) \ - = MODULE_SYMBOL_PREFIX #sym; \ + = VMLINUX_SYMBOL_STR(sym); \ static const struct kernel_symbol __ksymtab_##sym \ __used \ __attribute__((section("___ksymtab" sec "+" #sym), unused)) \ @@ -85,5 +92,6 @@ extern struct module __this_module; #define EXPORT_UNUSED_SYMBOL_GPL(sym) #endif /* CONFIG_MODULES */ +#endif /* !__ASSEMBLY__ */ #endif /* _LINUX_EXPORT_H */ diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 80d36874689b..e13e992eae8a 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -723,13 +723,6 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { } /* Trap pasters of __FUNCTION__ at compile-time */ #define __FUNCTION__ (__func__) -/* This helps us to avoid #ifdef CONFIG_SYMBOL_PREFIX */ -#ifdef CONFIG_SYMBOL_PREFIX -#define SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX -#else -#define SYMBOL_PREFIX "" -#endif - /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */ #ifdef CONFIG_FTRACE_MCOUNT_RECORD # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD diff --git a/include/linux/module.h b/include/linux/module.h index ead1b5719a12..46f1ea01e6f6 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -190,7 +190,7 @@ extern int modules_disabled; /* for sysctl */ /* Get/put a kernel symbol (calls must be symmetric) */ void *__symbol_get(const char *symbol); void *__symbol_get_gpl(const char *symbol); -#define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x))) +#define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x)))) /* modules using other modules: kdb wants to see this. */ struct module_use { @@ -453,7 +453,7 @@ extern void __module_put_and_exit(struct module *mod, long code) #ifdef CONFIG_MODULE_UNLOAD unsigned long module_refcount(struct module *mod); void __symbol_put(const char *symbol); -#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x) +#define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x)) void symbol_put_addr(void *addr); /* Sometimes we know we already have a refcount, and it's easier not diff --git a/kernel/modsign_certificate.S b/kernel/modsign_certificate.S index 246b4c6e6135..4a9a86d12c8b 100644 --- a/kernel/modsign_certificate.S +++ b/kernel/modsign_certificate.S @@ -1,15 +1,8 @@ -/* SYMBOL_PREFIX defined on commandline from CONFIG_SYMBOL_PREFIX */ -#ifndef SYMBOL_PREFIX -#define ASM_SYMBOL(sym) sym -#else -#define PASTE2(x,y) x##y -#define PASTE(x,y) PASTE2(x,y) -#define ASM_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym) -#endif +#include <linux/export.h> #define GLOBAL(name) \ - .globl ASM_SYMBOL(name); \ - ASM_SYMBOL(name): + .globl VMLINUX_SYMBOL(name); \ + VMLINUX_SYMBOL(name): .section ".init.data","aw" diff --git a/kernel/module.c b/kernel/module.c index 0925c9a71975..cfd4a3f68d7d 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -1209,7 +1209,7 @@ static inline int check_modstruct_version(Elf_Shdr *sechdrs, /* Since this should be found in kernel (which can't be removed), * no locking is necessary. */ - if (!find_symbol(MODULE_SYMBOL_PREFIX "module_layout", NULL, + if (!find_symbol(VMLINUX_SYMBOL_STR(module_layout), NULL, &crc, true, false)) BUG(); return check_version(sechdrs, versindex, "module_layout", mod, crc, diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 07125e697d7a..a373a1f66023 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -119,13 +119,6 @@ _c_flags += $(if $(patsubst n%,, \ $(CFLAGS_GCOV)) endif -ifdef CONFIG_SYMBOL_PREFIX -_sym_flags = -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX)) -_cpp_flags += $(_sym_flags) -_a_flags += $(_sym_flags) -endif - - # If building the kernel in a separate objtree expand all occurrences # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index 3d569d6022c2..014994936b1c 100644 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -74,9 +74,8 @@ kallsyms() info KSYM ${2} local kallsymopt; - if [ -n "${CONFIG_SYMBOL_PREFIX}" ]; then - kallsymopt="${kallsymopt} \ - --symbol-prefix=${CONFIG_SYMBOL_PREFIX}" + if [ -n "${CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX}" ]; then + kallsymopt="${kallsymopt} --symbol-prefix=_" fi if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 78b30c1548e9..282decfa29ae 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -18,14 +18,7 @@ #include "modpost.h" #include "../../include/generated/autoconf.h" #include "../../include/linux/license.h" - -/* Some toolchains use a `_' prefix for all user symbols. */ -#ifdef CONFIG_SYMBOL_PREFIX -#define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX -#else -#define MODULE_SYMBOL_PREFIX "" -#endif - +#include "../../include/linux/export.h" /* Are we using CONFIG_MODVERSIONS? */ int modversions = 0; @@ -562,7 +555,7 @@ static void parse_elf_finish(struct elf_info *info) static int ignore_undef_symbol(struct elf_info *info, const char *symname) { /* ignore __this_module, it will be resolved shortly */ - if (strcmp(symname, MODULE_SYMBOL_PREFIX "__this_module") == 0) + if (strcmp(symname, VMLINUX_SYMBOL_STR(__this_module)) == 0) return 1; /* ignore global offset table */ if (strcmp(symname, "_GLOBAL_OFFSET_TABLE_") == 0) @@ -583,8 +576,8 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname) return 0; } -#define CRC_PFX MODULE_SYMBOL_PREFIX "__crc_" -#define KSYMTAB_PFX MODULE_SYMBOL_PREFIX "__ksymtab_" +#define CRC_PFX VMLINUX_SYMBOL_STR(__crc_) +#define KSYMTAB_PFX VMLINUX_SYMBOL_STR(__ksymtab_) static void handle_modversions(struct module *mod, struct elf_info *info, Elf_Sym *sym, const char *symname) @@ -637,14 +630,15 @@ static void handle_modversions(struct module *mod, struct elf_info *info, } #endif - if (memcmp(symname, MODULE_SYMBOL_PREFIX, - strlen(MODULE_SYMBOL_PREFIX)) == 0) { - mod->unres = - alloc_symbol(symname + - strlen(MODULE_SYMBOL_PREFIX), - ELF_ST_BIND(sym->st_info) == STB_WEAK, - mod->unres); - } +#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX + if (symname[0] != '_') + break; + else + symname++; +#endif + mod->unres = alloc_symbol(symname, + ELF_ST_BIND(sym->st_info) == STB_WEAK, + mod->unres); break; default: /* All exported symbols */ @@ -652,9 +646,9 @@ static void handle_modversions(struct module *mod, struct elf_info *info, sym_add_exported(symname + strlen(KSYMTAB_PFX), mod, export); } - if (strcmp(symname, MODULE_SYMBOL_PREFIX "init_module") == 0) + if (strcmp(symname, VMLINUX_SYMBOL_STR(init_module)) == 0) mod->has_init = 1; - if (strcmp(symname, MODULE_SYMBOL_PREFIX "cleanup_module") == 0) + if (strcmp(symname, VMLINUX_SYMBOL_STR(cleanup_module)) == 0) mod->has_cleanup = 1; break; } |
