mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 10:37:45 +07:00
7034228792
Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/*
|
|
* 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;
|
|
}
|