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modpost: remove symbol prefix support 

CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG.
They were removed by commit 4ba66a9760 ("arch: remove blackfin port"),
commit bb6fb6dfcc ("metag: Remove arch/metag/"), respectively.

No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX,
hence VMLINUX_SYMBOL_STR(foo) can be simplify replaced with "foo".

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Masahiro Yamada 2018-05-09 16:23:45 +09:00
parent d5940c60e0
commit b2c5cdcfd4
1 changed files with 10 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
scripts/mod/modpost.c
View File

@ -19,9 +19,7 @@
#include <stdbool.h>
#include <errno.h>
#include "modpost.h"
#include "../../include/generated/autoconf.h"
#include "../../include/linux/license.h"
#include "../../include/linux/export.h"
/* Are we using CONFIG_MODVERSIONS? */
static int modversions = 0;
@ -591,7 +589,7 @@ 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, VMLINUX_SYMBOL_STR(__this_module)) == 0)
if (strcmp(symname, "__this_module") == 0)
return 1;
/* ignore global offset table */
if (strcmp(symname, "_GLOBAL_OFFSET_TABLE_") == 0)
@ -617,9 +615,6 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
return 0;
}
#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)
{
@ -634,7 +629,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
export = export_from_sec(info, get_secindex(info, sym));
/* CRC'd symbol */
if (strncmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) {
if (strncmp(symname, "__crc_", strlen("__crc_")) == 0) {
is_crc = true;
crc = (unsigned int) sym->st_value;
if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS) {
@ -647,7 +642,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
info->sechdrs[sym->st_shndx].sh_addr : 0);
crc = *crcp;
}
sym_update_crc(symname + strlen(CRC_PFX), mod, crc,
sym_update_crc(symname + strlen("__crc_"), mod, crc,
export);
}
@ -685,15 +680,10 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
}
#endif
#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
if (symname[0] != '_')
break;
else
symname++;
#endif
if (is_crc) {
const char *e = is_vmlinux(mod->name) ?"":".ko";
warn("EXPORT symbol \"%s\" [%s%s] version generation failed, symbol will not be versioned.\n", symname + strlen(CRC_PFX), mod->name, e);
warn("EXPORT symbol \"%s\" [%s%s] version generation failed, symbol will not be versioned.\n",
symname + strlen("__crc_"), mod->name, e);
}
mod->unres = alloc_symbol(symname,
ELF_ST_BIND(sym->st_info) == STB_WEAK,
@ -701,13 +691,13 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
break;
default:
/* All exported symbols */
if (strncmp(symname, KSYMTAB_PFX, strlen(KSYMTAB_PFX)) == 0) {
sym_add_exported(symname + strlen(KSYMTAB_PFX), mod,
if (strncmp(symname, "__ksymtab_", strlen("__ksymtab_")) == 0) {
sym_add_exported(symname + strlen("__ksymtab_"), mod,
export);
}
if (strcmp(symname, VMLINUX_SYMBOL_STR(init_module)) == 0)
if (strcmp(symname, "init_module") == 0)
mod->has_init = 1;
if (strcmp(symname, VMLINUX_SYMBOL_STR(cleanup_module)) == 0)
if (strcmp(symname, "cleanup_module") == 0)
mod->has_cleanup = 1;
break;
}
@ -2230,7 +2220,7 @@ static int add_versions(struct buffer *b, struct module *mod)
err = 1;
break;
}
buf_printf(b, "\t{ %#8x, __VMLINUX_SYMBOL_STR(%s) },\n",
buf_printf(b, "\t{ %#8x, \"%s\" },\n",
s->crc, s->name);
}