mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-17 01:34:00 +08:00
66574cc054
This patch removes all the module loader hook implementations in the architecture specific code where the functionality is the same as that now provided by the recently added default hooks. Signed-off-by: Jonas Bonn <jonas@southpole.se> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/* Kernel module help for SH.
|
|
|
|
SHcompact version by Kaz Kojima and Paul Mundt.
|
|
|
|
SHmedia bits:
|
|
|
|
Copyright 2004 SuperH (UK) Ltd
|
|
Author: Richard Curnow
|
|
|
|
Based on the sh version, and on code from the sh64-specific parts of
|
|
modutils, originally written by Richard Curnow and Ben Gaster.
|
|
|
|
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
|
|
*/
|
|
#include <linux/moduleloader.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/bug.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <asm/unaligned.h>
|
|
#include <asm/dwarf.h>
|
|
|
|
int apply_relocate_add(Elf32_Shdr *sechdrs,
|
|
const char *strtab,
|
|
unsigned int symindex,
|
|
unsigned int relsec,
|
|
struct module *me)
|
|
{
|
|
unsigned int i;
|
|
Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
|
|
Elf32_Sym *sym;
|
|
Elf32_Addr relocation;
|
|
uint32_t *location;
|
|
uint32_t value;
|
|
|
|
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. Note that all
|
|
undefined symbols have been resolved. */
|
|
sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
|
|
+ ELF32_R_SYM(rel[i].r_info);
|
|
relocation = sym->st_value + rel[i].r_addend;
|
|
|
|
#ifdef CONFIG_SUPERH64
|
|
/* For text addresses, bit2 of the st_other field indicates
|
|
* whether the symbol is SHmedia (1) or SHcompact (0). If
|
|
* SHmedia, the LSB of the symbol needs to be asserted
|
|
* for the CPU to be in SHmedia mode when it starts executing
|
|
* the branch target. */
|
|
relocation |= !!(sym->st_other & 4);
|
|
#endif
|
|
|
|
switch (ELF32_R_TYPE(rel[i].r_info)) {
|
|
case R_SH_NONE:
|
|
break;
|
|
case R_SH_DIR32:
|
|
value = get_unaligned(location);
|
|
value += relocation;
|
|
put_unaligned(value, location);
|
|
break;
|
|
case R_SH_REL32:
|
|
relocation = (relocation - (Elf32_Addr) location);
|
|
value = get_unaligned(location);
|
|
value += relocation;
|
|
put_unaligned(value, location);
|
|
break;
|
|
case R_SH_IMM_LOW16:
|
|
*location = (*location & ~0x3fffc00) |
|
|
((relocation & 0xffff) << 10);
|
|
break;
|
|
case R_SH_IMM_MEDLOW16:
|
|
*location = (*location & ~0x3fffc00) |
|
|
(((relocation >> 16) & 0xffff) << 10);
|
|
break;
|
|
case R_SH_IMM_LOW16_PCREL:
|
|
relocation -= (Elf32_Addr) location;
|
|
*location = (*location & ~0x3fffc00) |
|
|
((relocation & 0xffff) << 10);
|
|
break;
|
|
case R_SH_IMM_MEDLOW16_PCREL:
|
|
relocation -= (Elf32_Addr) location;
|
|
*location = (*location & ~0x3fffc00) |
|
|
(((relocation >> 16) & 0xffff) << 10);
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "module %s: Unknown relocation: %u\n",
|
|
me->name, ELF32_R_TYPE(rel[i].r_info));
|
|
return -ENOEXEC;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int module_finalize(const Elf_Ehdr *hdr,
|
|
const Elf_Shdr *sechdrs,
|
|
struct module *me)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret |= module_dwarf_finalize(hdr, sechdrs, me);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void module_arch_cleanup(struct module *mod)
|
|
{
|
|
module_dwarf_cleanup(mod);
|
|
}
|