forked from Minki/linux
MIPS: Fix module.c build for 32 bit
Fixes build failure introduced by "Make most arch asm/module.h files use asm-generic/module.h" by moving all the RELA processing code to a separate file to be used only for RELA processing on 64-bit kernels. CC arch/mips/kernel/module.o arch/mips/kernel/module.c:250:14: error: 'reloc_handlers_rela' defined but not used [-Werror=unused-variable] cc1: all warnings being treated as errors make[6]: *** [arch/mips/kernel/module.o] Error 1 Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Ralf Baechle
Rusty Russell
parent
c99af3752b
commit
6ede81239e
@ -31,6 +31,7 @@ obj-$(CONFIG_SYNC_R4K) += sync-r4k.o
|
||||
|
||||
obj-$(CONFIG_STACKTRACE) += stacktrace.o
|
||||
obj-$(CONFIG_MODULES) += mips_ksyms.o module.o
|
||||
obj-$(CONFIG_MODULES) += module-rela.o
|
||||
|
||||
obj-$(CONFIG_FUNCTION_TRACER) += mcount.o ftrace.o
|
||||
|
||||
|
||||
145
arch/mips/kernel/module-rela.c
Normal file
145
arch/mips/kernel/module-rela.c
Normal file
@ -0,0 +1,145 @@
|
||||
/*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*
|
||||
* Copyright (C) 2001 Rusty Russell.
|
||||
* Copyright (C) 2003, 2004 Ralf Baechle (ralf@linux-mips.org)
|
||||
* Copyright (C) 2005 Thiemo Seufer
|
||||
*/
|
||||
|
||||
#include <linux/elf.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/moduleloader.h>
|
||||
|
||||
extern int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v);
|
||||
|
||||
static int apply_r_mips_32_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*location = v;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
if (v % 4) {
|
||||
pr_err("module %s: dangerous R_MIPS_26 RELArelocation\n",
|
||||
me->name);
|
||||
return -ENOEXEC;
|
||||
}
|
||||
|
||||
if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
|
||||
printk(KERN_ERR
|
||||
"module %s: relocation overflow\n",
|
||||
me->name);
|
||||
return -ENOEXEC;
|
||||
}
|
||||
|
||||
*location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_hi16_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) |
|
||||
((((long long) v + 0x8000LL) >> 16) & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_lo16_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) | (v & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_64_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*(Elf_Addr *)location = v;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_higher_rela(struct module *me, u32 *location,
|
||||
Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) |
|
||||
((((long long) v + 0x80008000LL) >> 32) & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_highest_rela(struct module *me, u32 *location,
|
||||
Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) |
|
||||
((((long long) v + 0x800080008000LL) >> 48) & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int (*reloc_handlers_rela[]) (struct module *me, u32 *location,
|
||||
Elf_Addr v) = {
|
||||
[R_MIPS_NONE] = apply_r_mips_none,
|
||||
[R_MIPS_32] = apply_r_mips_32_rela,
|
||||
[R_MIPS_26] = apply_r_mips_26_rela,
|
||||
[R_MIPS_HI16] = apply_r_mips_hi16_rela,
|
||||
[R_MIPS_LO16] = apply_r_mips_lo16_rela,
|
||||
[R_MIPS_64] = apply_r_mips_64_rela,
|
||||
[R_MIPS_HIGHER] = apply_r_mips_higher_rela,
|
||||
[R_MIPS_HIGHEST] = apply_r_mips_highest_rela
|
||||
};
|
||||
|
||||
int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
|
||||
unsigned int symindex, unsigned int relsec,
|
||||
struct module *me)
|
||||
{
|
||||
Elf_Mips_Rela *rel = (void *) sechdrs[relsec].sh_addr;
|
||||
Elf_Sym *sym;
|
||||
u32 *location;
|
||||
unsigned int i;
|
||||
Elf_Addr v;
|
||||
int res;
|
||||
|
||||
pr_debug("Applying relocate section %u to %u\n", relsec,
|
||||
sechdrs[relsec].sh_info);
|
||||
|
||||
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
|
||||
/* This is where to make the change */
|
||||
location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
|
||||
+ rel[i].r_offset;
|
||||
/* This is the symbol it is referring to */
|
||||
sym = (Elf_Sym *)sechdrs[symindex].sh_addr
|
||||
+ ELF_MIPS_R_SYM(rel[i]);
|
||||
if (IS_ERR_VALUE(sym->st_value)) {
|
||||
/* Ignore unresolved weak symbol */
|
||||
if (ELF_ST_BIND(sym->st_info) == STB_WEAK)
|
||||
continue;
|
||||
printk(KERN_WARNING "%s: Unknown symbol %s\n",
|
||||
me->name, strtab + sym->st_name);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
v = sym->st_value + rel[i].r_addend;
|
||||
|
||||
res = reloc_handlers_rela[ELF_MIPS_R_TYPE(rel[i])](me, location, v);
|
||||
if (res)
|
||||
return res;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -51,7 +51,7 @@ void *module_alloc(unsigned long size)
|
||||
}
|
||||
#endif
|
||||
|
||||
static int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v)
|
||||
int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
@ -63,13 +63,6 @@ static int apply_r_mips_32_rel(struct module *me, u32 *location, Elf_Addr v)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_32_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*location = v;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
if (v % 4) {
|
||||
@ -91,26 +84,6 @@ static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
if (v % 4) {
|
||||
pr_err("module %s: dangerous R_MIPS_26 RELArelocation\n",
|
||||
me->name);
|
||||
return -ENOEXEC;
|
||||
}
|
||||
|
||||
if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
|
||||
printk(KERN_ERR
|
||||
"module %s: relocation overflow\n",
|
||||
me->name);
|
||||
return -ENOEXEC;
|
||||
}
|
||||
|
||||
*location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
struct mips_hi16 *n;
|
||||
@ -132,14 +105,6 @@ static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_hi16_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) |
|
||||
((((long long) v + 0x8000LL) >> 16) & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void free_relocation_chain(struct mips_hi16 *l)
|
||||
{
|
||||
struct mips_hi16 *next;
|
||||
@ -217,38 +182,6 @@ out_danger:
|
||||
return -ENOEXEC;
|
||||
}
|
||||
|
||||
static int apply_r_mips_lo16_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) | (v & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_64_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*(Elf_Addr *)location = v;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_higher_rela(struct module *me, u32 *location,
|
||||
Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) |
|
||||
((((long long) v + 0x80008000LL) >> 32) & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_highest_rela(struct module *me, u32 *location,
|
||||
Elf_Addr v)
|
||||
{
|
||||
*location = (*location & 0xffff0000) |
|
||||
((((long long) v + 0x800080008000LL) >> 48) & 0xffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int (*reloc_handlers_rel[]) (struct module *me, u32 *location,
|
||||
Elf_Addr v) = {
|
||||
[R_MIPS_NONE] = apply_r_mips_none,
|
||||
@ -258,18 +191,6 @@ static int (*reloc_handlers_rel[]) (struct module *me, u32 *location,
|
||||
[R_MIPS_LO16] = apply_r_mips_lo16_rel
|
||||
};
|
||||
|
||||
static int (*reloc_handlers_rela[]) (struct module *me, u32 *location,
|
||||
Elf_Addr v) = {
|
||||
[R_MIPS_NONE] = apply_r_mips_none,
|
||||
[R_MIPS_32] = apply_r_mips_32_rela,
|
||||
[R_MIPS_26] = apply_r_mips_26_rela,
|
||||
[R_MIPS_HI16] = apply_r_mips_hi16_rela,
|
||||
[R_MIPS_LO16] = apply_r_mips_lo16_rela,
|
||||
[R_MIPS_64] = apply_r_mips_64_rela,
|
||||
[R_MIPS_HIGHER] = apply_r_mips_higher_rela,
|
||||
[R_MIPS_HIGHEST] = apply_r_mips_highest_rela
|
||||
};
|
||||
|
||||
int apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
|
||||
unsigned int symindex, unsigned int relsec,
|
||||
struct module *me)
|
||||
@ -324,46 +245,6 @@ int apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
|
||||
return 0;
|
||||
}
|
||||
|
||||
int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
|
||||
unsigned int symindex, unsigned int relsec,
|
||||
struct module *me)
|
||||
{
|
||||
Elf_Mips_Rela *rel = (void *) sechdrs[relsec].sh_addr;
|
||||
Elf_Sym *sym;
|
||||
u32 *location;
|
||||
unsigned int i;
|
||||
Elf_Addr v;
|
||||
int res;
|
||||
|
||||
pr_debug("Applying relocate section %u to %u\n", relsec,
|
||||
sechdrs[relsec].sh_info);
|
||||
|
||||
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
|
||||
/* This is where to make the change */
|
||||
location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
|
||||
+ rel[i].r_offset;
|
||||
/* This is the symbol it is referring to */
|
||||
sym = (Elf_Sym *)sechdrs[symindex].sh_addr
|
||||
+ ELF_MIPS_R_SYM(rel[i]);
|
||||
if (IS_ERR_VALUE(sym->st_value)) {
|
||||
/* Ignore unresolved weak symbol */
|
||||
if (ELF_ST_BIND(sym->st_info) == STB_WEAK)
|
||||
continue;
|
||||
printk(KERN_WARNING "%s: Unknown symbol %s\n",
|
||||
me->name, strtab + sym->st_name);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
v = sym->st_value + rel[i].r_addend;
|
||||
|
||||
res = reloc_handlers_rela[ELF_MIPS_R_TYPE(rel[i])](me, location, v);
|
||||
if (res)
|
||||
return res;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Given an address, look for it in the module exception tables. */
|
||||
const struct exception_table_entry *search_module_dbetables(unsigned long addr)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user