mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 13:22:23 +00:00
595d681f2c
The latest Blackfin toolchain has fixed its relocation scheme to match other ports: always use R_BFIN_ prefix and capitalize everything. This brings the kernel in line with those fixes. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
365 lines
11 KiB
C
365 lines
11 KiB
C
/*
|
|
* File: arch/blackfin/kernel/module.c
|
|
* Based on:
|
|
* Author:
|
|
*
|
|
* Created:
|
|
* Description:
|
|
*
|
|
* Modified:
|
|
* Copyright 2004-2006 Analog Devices Inc.
|
|
*
|
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* 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, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
|
|
#include <linux/moduleloader.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/cacheflush.h>
|
|
|
|
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);
|
|
}
|
|
|
|
/* Transfer the section to the L1 memory */
|
|
int
|
|
module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs,
|
|
char *secstrings, struct module *mod)
|
|
{
|
|
/*
|
|
* XXX: sechdrs are vmalloced in kernel/module.c
|
|
* and would be vfreed just after module is loaded,
|
|
* so we hack to keep the only information we needed
|
|
* in mod->arch to correctly free L1 I/D sram later.
|
|
* NOTE: this breaks the semantic of mod->arch structure.
|
|
*/
|
|
Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;
|
|
void *dest = NULL;
|
|
|
|
for (s = sechdrs; s < sechdrs_end; ++s) {
|
|
if ((strcmp(".l1.text", secstrings + s->sh_name) == 0) ||
|
|
((strcmp(".text", secstrings + s->sh_name) == 0) &&
|
|
(hdr->e_flags & EF_BFIN_CODE_IN_L1) && (s->sh_size > 0))) {
|
|
dest = l1_inst_sram_alloc(s->sh_size);
|
|
mod->arch.text_l1 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L1 instruction memory allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
dma_memcpy(dest, (void *)s->sh_addr, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
if ((strcmp(".l1.data", secstrings + s->sh_name) == 0) ||
|
|
((strcmp(".data", secstrings + s->sh_name) == 0) &&
|
|
(hdr->e_flags & EF_BFIN_DATA_IN_L1) && (s->sh_size > 0))) {
|
|
dest = l1_data_sram_alloc(s->sh_size);
|
|
mod->arch.data_a_l1 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L1 data memory allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
memcpy(dest, (void *)s->sh_addr, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
if (strcmp(".l1.bss", secstrings + s->sh_name) == 0 ||
|
|
((strcmp(".bss", secstrings + s->sh_name) == 0) &&
|
|
(hdr->e_flags & EF_BFIN_DATA_IN_L1) && (s->sh_size > 0))) {
|
|
dest = l1_data_sram_alloc(s->sh_size);
|
|
mod->arch.bss_a_l1 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L1 data memory allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
memset(dest, 0, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
if (strcmp(".l1.data.B", secstrings + s->sh_name) == 0) {
|
|
dest = l1_data_B_sram_alloc(s->sh_size);
|
|
mod->arch.data_b_l1 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L1 data memory allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
memcpy(dest, (void *)s->sh_addr, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
if (strcmp(".l1.bss.B", secstrings + s->sh_name) == 0) {
|
|
dest = l1_data_B_sram_alloc(s->sh_size);
|
|
mod->arch.bss_b_l1 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L1 data memory allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
memset(dest, 0, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
if ((strcmp(".l2.text", secstrings + s->sh_name) == 0) ||
|
|
((strcmp(".text", secstrings + s->sh_name) == 0) &&
|
|
(hdr->e_flags & EF_BFIN_CODE_IN_L2) && (s->sh_size > 0))) {
|
|
dest = l2_sram_alloc(s->sh_size);
|
|
mod->arch.text_l2 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L2 SRAM allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
memcpy(dest, (void *)s->sh_addr, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
if ((strcmp(".l2.data", secstrings + s->sh_name) == 0) ||
|
|
((strcmp(".data", secstrings + s->sh_name) == 0) &&
|
|
(hdr->e_flags & EF_BFIN_DATA_IN_L2) && (s->sh_size > 0))) {
|
|
dest = l2_sram_alloc(s->sh_size);
|
|
mod->arch.data_l2 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L2 SRAM allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
memcpy(dest, (void *)s->sh_addr, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
if (strcmp(".l2.bss", secstrings + s->sh_name) == 0 ||
|
|
((strcmp(".bss", secstrings + s->sh_name) == 0) &&
|
|
(hdr->e_flags & EF_BFIN_DATA_IN_L2) && (s->sh_size > 0))) {
|
|
dest = l2_sram_alloc(s->sh_size);
|
|
mod->arch.bss_l2 = dest;
|
|
if (dest == NULL) {
|
|
printk(KERN_ERR
|
|
"module %s: L2 SRAM allocation failed\n",
|
|
mod->name);
|
|
return -1;
|
|
}
|
|
memset(dest, 0, s->sh_size);
|
|
s->sh_flags &= ~SHF_ALLOC;
|
|
s->sh_addr = (unsigned long)dest;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
apply_relocate(Elf_Shdr * sechdrs, const char *strtab,
|
|
unsigned int symindex, unsigned int relsec, struct module *me)
|
|
{
|
|
printk(KERN_ERR "module %s: .rel unsupported\n", me->name);
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
/* FUNCTION : apply_relocate_add */
|
|
/* ABSTRACT : Blackfin specific relocation handling for the loadable */
|
|
/* modules. Modules are expected to be .o files. */
|
|
/* Arithmetic relocations are handled. */
|
|
/* We do not expect LSETUP to be split and hence is not */
|
|
/* handled. */
|
|
/* R_BFIN_BYTE and R_BFIN_BYTE2 are also not handled as the */
|
|
/* gas does not generate it. */
|
|
/*************************************************************************/
|
|
int
|
|
apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab,
|
|
unsigned int symindex, unsigned int relsec,
|
|
struct module *mod)
|
|
{
|
|
unsigned int i;
|
|
unsigned short tmp;
|
|
Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
|
|
Elf32_Sym *sym;
|
|
uint32_t *location32;
|
|
uint16_t *location16;
|
|
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 */
|
|
location16 =
|
|
(uint16_t *) (sechdrs[sechdrs[relsec].sh_info].sh_addr +
|
|
rel[i].r_offset);
|
|
location32 = (uint32_t *) location16;
|
|
/* 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);
|
|
value = sym->st_value;
|
|
value += rel[i].r_addend;
|
|
pr_debug("location is %x, value is %x type is %d \n",
|
|
(unsigned int) location32, value,
|
|
ELF32_R_TYPE(rel[i].r_info));
|
|
#ifdef CONFIG_SMP
|
|
if ((unsigned long)location16 >= COREB_L1_DATA_A_START) {
|
|
printk(KERN_ERR "module %s: cannot relocate in L1: %u (SMP kernel)",
|
|
mod->name, ELF32_R_TYPE(rel[i].r_info));
|
|
return -ENOEXEC;
|
|
}
|
|
#endif
|
|
switch (ELF32_R_TYPE(rel[i].r_info)) {
|
|
|
|
case R_BFIN_PCREL24:
|
|
case R_BFIN_PCREL24_JUMP_L:
|
|
/* Add the value, subtract its postition */
|
|
location16 =
|
|
(uint16_t *) (sechdrs[sechdrs[relsec].sh_info].
|
|
sh_addr + rel[i].r_offset - 2);
|
|
location32 = (uint32_t *) location16;
|
|
value -= (uint32_t) location32;
|
|
value >>= 1;
|
|
if ((value & 0xFF000000) != 0 &&
|
|
(value & 0xFF000000) != 0xFF000000) {
|
|
printk(KERN_ERR "module %s: relocation overflow\n",
|
|
mod->name);
|
|
return -ENOEXEC;
|
|
}
|
|
pr_debug("value is %x, before %x-%x after %x-%x\n", value,
|
|
*location16, *(location16 + 1),
|
|
(*location16 & 0xff00) | (value >> 16 & 0x00ff),
|
|
value & 0xffff);
|
|
*location16 =
|
|
(*location16 & 0xff00) | (value >> 16 & 0x00ff);
|
|
*(location16 + 1) = value & 0xffff;
|
|
break;
|
|
case R_BFIN_PCREL12_JUMP:
|
|
case R_BFIN_PCREL12_JUMP_S:
|
|
value -= (uint32_t) location32;
|
|
value >>= 1;
|
|
*location16 = (value & 0xfff);
|
|
break;
|
|
case R_BFIN_PCREL10:
|
|
value -= (uint32_t) location32;
|
|
value >>= 1;
|
|
*location16 = (value & 0x3ff);
|
|
break;
|
|
case R_BFIN_LUIMM16:
|
|
pr_debug("before %x after %x\n", *location16,
|
|
(value & 0xffff));
|
|
tmp = (value & 0xffff);
|
|
if ((unsigned long)location16 >= L1_CODE_START) {
|
|
dma_memcpy(location16, &tmp, 2);
|
|
} else
|
|
*location16 = tmp;
|
|
break;
|
|
case R_BFIN_HUIMM16:
|
|
pr_debug("before %x after %x\n", *location16,
|
|
((value >> 16) & 0xffff));
|
|
tmp = ((value >> 16) & 0xffff);
|
|
if ((unsigned long)location16 >= L1_CODE_START) {
|
|
dma_memcpy(location16, &tmp, 2);
|
|
} else
|
|
*location16 = tmp;
|
|
break;
|
|
case R_BFIN_RIMM16:
|
|
*location16 = (value & 0xffff);
|
|
break;
|
|
case R_BFIN_BYTE4_DATA:
|
|
pr_debug("before %x after %x\n", *location32, value);
|
|
*location32 = value;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "module %s: Unknown relocation: %u\n",
|
|
mod->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 *mod)
|
|
{
|
|
unsigned int i, strindex = 0, symindex = 0;
|
|
char *secstrings;
|
|
long err = 0;
|
|
|
|
secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
|
|
|
|
for (i = 1; i < hdr->e_shnum; i++) {
|
|
/* Internal symbols and strings. */
|
|
if (sechdrs[i].sh_type == SHT_SYMTAB) {
|
|
symindex = i;
|
|
strindex = sechdrs[i].sh_link;
|
|
}
|
|
}
|
|
|
|
for (i = 1; i < hdr->e_shnum; i++) {
|
|
const char *strtab = (char *)sechdrs[strindex].sh_addr;
|
|
unsigned int info = sechdrs[i].sh_info;
|
|
|
|
/* Not a valid relocation section? */
|
|
if (info >= hdr->e_shnum)
|
|
continue;
|
|
|
|
if ((sechdrs[i].sh_type == SHT_RELA) &&
|
|
((strcmp(".rela.l2.text", secstrings + sechdrs[i].sh_name) == 0) ||
|
|
(strcmp(".rela.l1.text", secstrings + sechdrs[i].sh_name) == 0) ||
|
|
((strcmp(".rela.text", secstrings + sechdrs[i].sh_name) == 0) &&
|
|
(hdr->e_flags & (EF_BFIN_CODE_IN_L1|EF_BFIN_CODE_IN_L2))))) {
|
|
err = apply_relocate_add((Elf_Shdr *) sechdrs, strtab,
|
|
symindex, i, mod);
|
|
if (err < 0)
|
|
return -ENOEXEC;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void module_arch_cleanup(struct module *mod)
|
|
{
|
|
l1_inst_sram_free(mod->arch.text_l1);
|
|
l1_data_A_sram_free(mod->arch.data_a_l1);
|
|
l1_data_A_sram_free(mod->arch.bss_a_l1);
|
|
l1_data_B_sram_free(mod->arch.data_b_l1);
|
|
l1_data_B_sram_free(mod->arch.bss_b_l1);
|
|
l2_sram_free(mod->arch.text_l2);
|
|
l2_sram_free(mod->arch.data_l2);
|
|
l2_sram_free(mod->arch.bss_l2);
|
|
}
|