sh: Merge sh and sh64 module.c.
This is trivial, in that they're both effectively the same for the base relocations anyways. SH-5 doesn't need the unaligned bits, and has a few extra relocations, which are never hit on non-SH5 parts. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
parent
ba2727b556
commit
1cb80fcfe2
|
@ -1,5 +1,15 @@
|
|||
/* 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
|
||||
|
@ -21,12 +31,6 @@
|
|||
#include <linux/string.h>
|
||||
#include <linux/kernel.h>
|
||||
|
||||
#if 0
|
||||
#define DEBUGP printk
|
||||
#else
|
||||
#define DEBUGP(fmt...)
|
||||
#endif
|
||||
|
||||
void *module_alloc(unsigned long size)
|
||||
{
|
||||
if (size == 0)
|
||||
|
@ -52,6 +56,7 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
|
|||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SUPERH32
|
||||
#define COPY_UNALIGNED_WORD(sw, tw, align) \
|
||||
{ \
|
||||
void *__s = &(sw), *__t = &(tw); \
|
||||
|
@ -74,6 +79,10 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
|
|||
break; \
|
||||
} \
|
||||
}
|
||||
#else
|
||||
/* One thing SHmedia doesn't screw up! */
|
||||
#define COPY_UNALIGNED_WORD(sw, tw, align) { (tw) = (sw); }
|
||||
#endif
|
||||
|
||||
int apply_relocate_add(Elf32_Shdr *sechdrs,
|
||||
const char *strtab,
|
||||
|
@ -89,8 +98,8 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
|
|||
uint32_t value;
|
||||
int align;
|
||||
|
||||
DEBUGP("Applying relocate section %u to %u\n", relsec,
|
||||
sechdrs[relsec].sh_info);
|
||||
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
|
||||
|
@ -102,17 +111,44 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
|
|||
relocation = sym->st_value + rel[i].r_addend;
|
||||
align = (int)location & 3;
|
||||
|
||||
#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_DIR32:
|
||||
COPY_UNALIGNED_WORD (*location, value, align);
|
||||
COPY_UNALIGNED_WORD (*location, value, align);
|
||||
value += relocation;
|
||||
COPY_UNALIGNED_WORD (value, *location, align);
|
||||
COPY_UNALIGNED_WORD (value, *location, align);
|
||||
break;
|
||||
case R_SH_REL32:
|
||||
relocation = (relocation - (Elf32_Addr) location);
|
||||
COPY_UNALIGNED_WORD (*location, value, align);
|
||||
relocation = (relocation - (Elf32_Addr) location);
|
||||
COPY_UNALIGNED_WORD (*location, value, align);
|
||||
value += relocation;
|
||||
COPY_UNALIGNED_WORD (value, *location, align);
|
||||
COPY_UNALIGNED_WORD (value, *location, align);
|
||||
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",
|
||||
|
|
|
@ -1,161 +0,0 @@
|
|||
/* Kernel module help for sh64.
|
||||
|
||||
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 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.
|
||||
|
||||
*/
|
||||
#include <linux/moduleloader.h>
|
||||
#include <linux/elf.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/kernel.h>
|
||||
|
||||
#if 0
|
||||
#define DEBUGP printk
|
||||
#else
|
||||
#define DEBUGP(fmt...)
|
||||
#endif
|
||||
|
||||
void *module_alloc(unsigned long size)
|
||||
{
|
||||
if (size == 0)
|
||||
return NULL;
|
||||
return vmalloc(size);
|
||||
}
|
||||
|
||||
|
||||
/* Free memory returned from module_alloc */
|
||||
void module_free(struct module *mod, void *module_region)
|
||||
{
|
||||
vfree(module_region);
|
||||
/* FIXME: If module_region == mod->init_region, trim exception
|
||||
table entries. */
|
||||
}
|
||||
|
||||
/* We don't need anything special. */
|
||||
int module_frob_arch_sections(Elf_Ehdr *hdr,
|
||||
Elf_Shdr *sechdrs,
|
||||
char *secstrings,
|
||||
struct module *mod)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
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;
|
||||
int align;
|
||||
int is_shmedia;
|
||||
|
||||
DEBUGP("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;
|
||||
align = (int)location & 3;
|
||||
|
||||
/* 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. */
|
||||
is_shmedia = (sym->st_other & 4) ? 1 : 0;
|
||||
if (is_shmedia) {
|
||||
relocation |= 1;
|
||||
}
|
||||
|
||||
switch (ELF32_R_TYPE(rel[i].r_info)) {
|
||||
case R_SH_DIR32:
|
||||
DEBUGP("R_SH_DIR32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
|
||||
*location += relocation;
|
||||
break;
|
||||
case R_SH_REL32:
|
||||
DEBUGP("R_SH_REL32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
|
||||
relocation -= (Elf32_Addr) location;
|
||||
*location += relocation;
|
||||
break;
|
||||
case R_SH_IMM_LOW16:
|
||||
DEBUGP("R_SH_IMM_LOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
|
||||
*location = (*location & ~0x3fffc00) |
|
||||
((relocation & 0xffff) << 10);
|
||||
break;
|
||||
case R_SH_IMM_MEDLOW16:
|
||||
DEBUGP("R_SH_IMM_MEDLOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
|
||||
*location = (*location & ~0x3fffc00) |
|
||||
(((relocation >> 16) & 0xffff) << 10);
|
||||
break;
|
||||
case R_SH_IMM_LOW16_PCREL:
|
||||
DEBUGP("R_SH_IMM_LOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
|
||||
relocation -= (Elf32_Addr) location;
|
||||
*location = (*location & ~0x3fffc00) |
|
||||
((relocation & 0xffff) << 10);
|
||||
break;
|
||||
case R_SH_IMM_MEDLOW16_PCREL:
|
||||
DEBUGP("R_SH_IMM_MEDLOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
|
||||
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 apply_relocate(Elf32_Shdr *sechdrs,
|
||||
const char *strtab,
|
||||
unsigned int symindex,
|
||||
unsigned int relsec,
|
||||
struct module *me)
|
||||
{
|
||||
printk(KERN_ERR "module %s: REL RELOCATION unsupported\n",
|
||||
me->name);
|
||||
return -ENOEXEC;
|
||||
}
|
||||
|
||||
int module_finalize(const Elf_Ehdr *hdr,
|
||||
const Elf_Shdr *sechdrs,
|
||||
struct module *me)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
void module_arch_cleanup(struct module *mod)
|
||||
{
|
||||
}
|
||||
|
Loading…
Reference in a new issue