Improved modules loader, more robust and works on 64bit kernels.
Signed-off-by: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>hifive-unleashed-5.1
Thiemo Seufer
Ralf Baechle
parent
7ee8798f37
commit
4e6a05fe5f
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@ -11,11 +11,7 @@ obj-y += cpu-probe.o branch.o entry.o genex.o irq.o process.o \
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binfmt_irix-objs := irixelf.o irixinv.o irixioctl.o irixsig.o \
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irix5sys.o sysirix.o
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ifdef CONFIG_MODULES
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obj-y += mips_ksyms.o module.o
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obj-$(CONFIG_32BIT) += module-elf32.o
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obj-$(CONFIG_64BIT) += module-elf64.o
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endif
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obj-$(CONFIG_MODULES) += mips_ksyms.o module.o
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obj-$(CONFIG_CPU_R3000) += r2300_fpu.o r2300_switch.o
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obj-$(CONFIG_CPU_TX39XX) += r2300_fpu.o r2300_switch.o
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@ -1,250 +0,0 @@
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Copyright (C) 2001 Rusty Russell.
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* Copyright (C) 2003, 2004 Ralf Baechle (ralf@linux-mips.org)
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*/
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#undef DEBUG
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#include <linux/moduleloader.h>
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#include <linux/elf.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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struct mips_hi16 {
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struct mips_hi16 *next;
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Elf32_Addr *addr;
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Elf32_Addr value;
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};
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static struct mips_hi16 *mips_hi16_list;
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void *module_alloc(unsigned long size)
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{
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if (size == 0)
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return NULL;
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return vmalloc(size);
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}
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/* Free memory returned from module_alloc */
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void module_free(struct module *mod, void *module_region)
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{
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vfree(module_region);
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/* FIXME: If module_region == mod->init_region, trim exception
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table entries. */
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}
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int module_frob_arch_sections(Elf_Ehdr *hdr,
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Elf_Shdr *sechdrs,
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char *secstrings,
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struct module *mod)
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{
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return 0;
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}
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static int apply_r_mips_none(struct module *me, uint32_t *location,
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Elf32_Addr v)
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{
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return 0;
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}
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static int apply_r_mips_32(struct module *me, uint32_t *location,
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Elf32_Addr v)
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{
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*location += v;
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return 0;
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}
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static int apply_r_mips_26(struct module *me, uint32_t *location,
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Elf32_Addr v)
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{
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if (v % 4) {
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printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
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return -ENOEXEC;
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}
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if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
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printk(KERN_ERR
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"module %s: relocation overflow\n",
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me->name);
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return -ENOEXEC;
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}
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*location = (*location & ~0x03ffffff) |
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((*location + (v >> 2)) & 0x03ffffff);
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return 0;
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}
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static int apply_r_mips_hi16(struct module *me, uint32_t *location,
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Elf32_Addr v)
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{
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struct mips_hi16 *n;
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/*
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* We cannot relocate this one now because we don't know the value of
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* the carry we need to add. Save the information, and let LO16 do the
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* actual relocation.
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*/
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n = kmalloc(sizeof *n, GFP_KERNEL);
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if (!n)
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return -ENOMEM;
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n->addr = location;
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n->value = v;
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n->next = mips_hi16_list;
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mips_hi16_list = n;
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return 0;
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}
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static int apply_r_mips_lo16(struct module *me, uint32_t *location,
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Elf32_Addr v)
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{
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unsigned long insnlo = *location;
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Elf32_Addr val, vallo;
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/* Sign extend the addend we extract from the lo insn. */
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vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
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if (mips_hi16_list != NULL) {
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struct mips_hi16 *l;
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l = mips_hi16_list;
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while (l != NULL) {
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struct mips_hi16 *next;
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unsigned long insn;
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/*
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* The value for the HI16 had best be the same.
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*/
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if (v != l->value)
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goto out_danger;
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/*
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* Do the HI16 relocation. Note that we actually don't
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* need to know anything about the LO16 itself, except
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* where to find the low 16 bits of the addend needed
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* by the LO16.
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*/
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insn = *l->addr;
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val = ((insn & 0xffff) << 16) + vallo;
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val += v;
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/*
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* Account for the sign extension that will happen in
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* the low bits.
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*/
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val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff;
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insn = (insn & ~0xffff) | val;
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*l->addr = insn;
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next = l->next;
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kfree(l);
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l = next;
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}
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mips_hi16_list = NULL;
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}
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/*
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* Ok, we're done with the HI16 relocs. Now deal with the LO16.
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*/
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val = v + vallo;
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insnlo = (insnlo & ~0xffff) | (val & 0xffff);
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*location = insnlo;
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return 0;
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out_danger:
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printk(KERN_ERR "module %s: dangerous " "relocation\n", me->name);
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return -ENOEXEC;
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}
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static int (*reloc_handlers[]) (struct module *me, uint32_t *location,
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Elf32_Addr v) = {
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[R_MIPS_NONE] = apply_r_mips_none,
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[R_MIPS_32] = apply_r_mips_32,
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[R_MIPS_26] = apply_r_mips_26,
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[R_MIPS_HI16] = apply_r_mips_hi16,
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[R_MIPS_LO16] = apply_r_mips_lo16
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};
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int apply_relocate(Elf32_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *me)
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{
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Elf32_Rel *rel = (void *) sechdrs[relsec].sh_addr;
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Elf32_Sym *sym;
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uint32_t *location;
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unsigned int i;
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Elf32_Addr v;
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int res;
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pr_debug("Applying relocate section %u to %u\n", relsec,
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sechdrs[relsec].sh_info);
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for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
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Elf32_Word r_info = rel[i].r_info;
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/* This is where to make the change */
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location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
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+ rel[i].r_offset;
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/* This is the symbol it is referring to */
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sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
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+ ELF32_R_SYM(r_info);
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if (!sym->st_value) {
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printk(KERN_WARNING "%s: Unknown symbol %s\n",
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me->name, strtab + sym->st_name);
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return -ENOENT;
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}
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v = sym->st_value;
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res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v);
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if (res)
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return res;
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}
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return 0;
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}
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int apply_relocate_add(Elf32_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *me)
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{
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/*
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* Current binutils always generate .rela relocations. Keep smiling
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* if it's empty, abort otherwise.
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*/
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if (!sechdrs[relsec].sh_size)
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return 0;
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printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
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me->name);
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return -ENOEXEC;
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}
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@ -1,274 +0,0 @@
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Copyright (C) 2001 Rusty Russell.
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* Copyright (C) 2003, 2004 Ralf Baechle (ralf@linux-mips.org)
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*/
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#undef DEBUG
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#include <linux/moduleloader.h>
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#include <linux/elf.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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struct mips_hi16 {
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struct mips_hi16 *next;
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Elf32_Addr *addr;
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Elf64_Addr value;
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};
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static struct mips_hi16 *mips_hi16_list;
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void *module_alloc(unsigned long size)
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{
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if (size == 0)
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return NULL;
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return vmalloc(size);
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}
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/* Free memory returned from module_alloc */
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void module_free(struct module *mod, void *module_region)
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{
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vfree(module_region);
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/* FIXME: If module_region == mod->init_region, trim exception
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table entries. */
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}
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int module_frob_arch_sections(Elf_Ehdr *hdr,
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Elf_Shdr *sechdrs,
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char *secstrings,
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struct module *mod)
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{
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return 0;
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}
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int apply_relocate(Elf64_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *me)
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{
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/*
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* We don't want to deal with REL relocations - RELA is so much saner.
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*/
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if (!sechdrs[relsec].sh_size)
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return 0;
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printk(KERN_ERR "module %s: REL relocation unsupported\n",
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me->name);
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return -ENOEXEC;
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}
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static int apply_r_mips_none(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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return 0;
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}
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static int apply_r_mips_32(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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*location = v;
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return 0;
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}
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static int apply_r_mips_26(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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if (v % 4) {
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printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
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return -ENOEXEC;
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}
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if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
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printk(KERN_ERR
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"module %s: relocation overflow\n",
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me->name);
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return -ENOEXEC;
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}
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*location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff);
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return 0;
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}
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static int apply_r_mips_hi16(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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struct mips_hi16 *n;
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/*
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* We cannot relocate this one now because we don't know the value of
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* the carry we need to add. Save the information, and let LO16 do the
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* actual relocation.
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*/
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n = kmalloc(sizeof *n, GFP_KERNEL);
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if (!n)
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return -ENOMEM;
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n->addr = location;
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n->value = v;
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n->next = mips_hi16_list;
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mips_hi16_list = n;
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return 0;
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}
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static int apply_r_mips_lo16(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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unsigned long insnlo = *location;
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Elf32_Addr val, vallo;
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/* Sign extend the addend we extract from the lo insn. */
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vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
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if (mips_hi16_list != NULL) {
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struct mips_hi16 *l;
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l = mips_hi16_list;
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while (l != NULL) {
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struct mips_hi16 *next;
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unsigned long insn;
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/*
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* The value for the HI16 had best be the same.
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*/
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if (v != l->value)
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goto out_danger;
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/*
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* Do the HI16 relocation. Note that we actually don't
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* need to know anything about the LO16 itself, except
|
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* where to find the low 16 bits of the addend needed
|
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* by the LO16.
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*/
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insn = *l->addr;
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val = ((insn & 0xffff) << 16) + vallo;
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val += v;
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/*
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* Account for the sign extension that will happen in
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* the low bits.
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*/
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val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff;
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insn = (insn & ~0xffff) | val;
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*l->addr = insn;
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next = l->next;
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kfree(l);
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l = next;
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}
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mips_hi16_list = NULL;
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}
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/*
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* Ok, we're done with the HI16 relocs. Now deal with the LO16.
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*/
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insnlo = (insnlo & ~0xffff) | (v & 0xffff);
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*location = insnlo;
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return 0;
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out_danger:
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printk(KERN_ERR "module %s: dangerous " "relocation\n", me->name);
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return -ENOEXEC;
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}
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static int apply_r_mips_64(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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*(uint64_t *) location = v;
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return 0;
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}
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static int apply_r_mips_higher(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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*location = (*location & 0xffff0000) |
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((((long long) v + 0x80008000LL) >> 32) & 0xffff);
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return 0;
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}
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static int apply_r_mips_highest(struct module *me, uint32_t *location,
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Elf64_Addr v)
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{
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*location = (*location & 0xffff0000) |
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((((long long) v + 0x800080008000LL) >> 48) & 0xffff);
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return 0;
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}
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static int (*reloc_handlers[]) (struct module *me, uint32_t *location,
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Elf64_Addr v) = {
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[R_MIPS_NONE] = apply_r_mips_none,
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[R_MIPS_32] = apply_r_mips_32,
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[R_MIPS_26] = apply_r_mips_26,
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[R_MIPS_HI16] = apply_r_mips_hi16,
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[R_MIPS_LO16] = apply_r_mips_lo16,
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[R_MIPS_64] = apply_r_mips_64,
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[R_MIPS_HIGHER] = apply_r_mips_higher,
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[R_MIPS_HIGHEST] = apply_r_mips_highest
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};
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||||
int apply_relocate_add(Elf64_Shdr *sechdrs,
|
||||
const char *strtab,
|
||||
unsigned int symindex,
|
||||
unsigned int relsec,
|
||||
struct module *me)
|
||||
{
|
||||
Elf64_Mips_Rela *rel = (void *) sechdrs[relsec].sh_addr;
|
||||
Elf64_Sym *sym;
|
||||
uint32_t *location;
|
||||
unsigned int i;
|
||||
Elf64_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 = (Elf64_Sym *)sechdrs[symindex].sh_addr + rel[i].r_sym;
|
||||
if (!sym->st_value) {
|
||||
printk(KERN_WARNING "%s: Unknown symbol %s\n",
|
||||
me->name, strtab + sym->st_name);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
v = sym->st_value;
|
||||
|
||||
res = reloc_handlers[rel[i].r_type](me, location, v);
|
||||
if (res)
|
||||
return res;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1,9 +1,345 @@
|
|||
/*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#undef DEBUG
|
||||
|
||||
#include <linux/moduleloader.h>
|
||||
#include <linux/elf.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/spinlock.h>
|
||||
|
||||
struct mips_hi16 {
|
||||
struct mips_hi16 *next;
|
||||
Elf_Addr *addr;
|
||||
Elf_Addr value;
|
||||
};
|
||||
|
||||
static struct mips_hi16 *mips_hi16_list;
|
||||
|
||||
static LIST_HEAD(dbe_list);
|
||||
static DEFINE_SPINLOCK(dbe_lock);
|
||||
|
||||
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. */
|
||||
}
|
||||
|
||||
int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
|
||||
char *secstrings, struct module *mod)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_32_rel(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
*location += 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) {
|
||||
printk(KERN_ERR "module %s: dangerous relocation\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) |
|
||||
((*location + (v >> 2)) & 0x03ffffff);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
if (v % 4) {
|
||||
printk(KERN_ERR "module %s: dangerous relocation\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;
|
||||
|
||||
/*
|
||||
* We cannot relocate this one now because we don't know the value of
|
||||
* the carry we need to add. Save the information, and let LO16 do the
|
||||
* actual relocation.
|
||||
*/
|
||||
n = kmalloc(sizeof *n, GFP_KERNEL);
|
||||
if (!n)
|
||||
return -ENOMEM;
|
||||
|
||||
n->addr = (Elf_Addr *)location;
|
||||
n->value = v;
|
||||
n->next = mips_hi16_list;
|
||||
mips_hi16_list = n;
|
||||
|
||||
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_rel(struct module *me, u32 *location, Elf_Addr v)
|
||||
{
|
||||
unsigned long insnlo = *location;
|
||||
Elf_Addr val, vallo;
|
||||
|
||||
/* Sign extend the addend we extract from the lo insn. */
|
||||
vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000;
|
||||
|
||||
if (mips_hi16_list != NULL) {
|
||||
struct mips_hi16 *l;
|
||||
|
||||
l = mips_hi16_list;
|
||||
while (l != NULL) {
|
||||
struct mips_hi16 *next;
|
||||
unsigned long insn;
|
||||
|
||||
/*
|
||||
* The value for the HI16 had best be the same.
|
||||
*/
|
||||
if (v != l->value)
|
||||
goto out_danger;
|
||||
|
||||
/*
|
||||
* Do the HI16 relocation. Note that we actually don't
|
||||
* need to know anything about the LO16 itself, except
|
||||
* where to find the low 16 bits of the addend needed
|
||||
* by the LO16.
|
||||
*/
|
||||
insn = *l->addr;
|
||||
val = ((insn & 0xffff) << 16) + vallo;
|
||||
val += v;
|
||||
|
||||
/*
|
||||
* Account for the sign extension that will happen in
|
||||
* the low bits.
|
||||
*/
|
||||
val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff;
|
||||
|
||||
insn = (insn & ~0xffff) | val;
|
||||
*l->addr = insn;
|
||||
|
||||
next = l->next;
|
||||
kfree(l);
|
||||
l = next;
|
||||
}
|
||||
|
||||
mips_hi16_list = NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Ok, we're done with the HI16 relocs. Now deal with the LO16.
|
||||
*/
|
||||
val = v + vallo;
|
||||
insnlo = (insnlo & ~0xffff) | (val & 0xffff);
|
||||
*location = insnlo;
|
||||
|
||||
return 0;
|
||||
|
||||
out_danger:
|
||||
printk(KERN_ERR "module %s: dangerous " "relocation\n", me->name);
|
||||
|
||||
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,
|
||||
[R_MIPS_32] = apply_r_mips_32_rel,
|
||||
[R_MIPS_26] = apply_r_mips_26_rel,
|
||||
[R_MIPS_HI16] = apply_r_mips_hi16_rel,
|
||||
[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)
|
||||
{
|
||||
Elf_Mips_Rel *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 (!sym->st_value) {
|
||||
printk(KERN_WARNING "%s: Unknown symbol %s\n",
|
||||
me->name, strtab + sym->st_name);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
v = sym->st_value;
|
||||
|
||||
res = reloc_handlers_rel[ELF_MIPS_R_TYPE(rel[i])](me, location, v);
|
||||
if (res)
|
||||
return res;
|
||||
}
|
||||
|
||||
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 (!sym->st_value) {
|
||||
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)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -14,15 +14,23 @@ struct mod_arch_specific {
|
|||
|
||||
typedef uint8_t Elf64_Byte; /* Type for a 8-bit quantity. */
|
||||
|
||||
typedef struct
|
||||
{
|
||||
Elf64_Addr r_offset; /* Address of relocation. */
|
||||
Elf64_Word r_sym; /* Symbol index. */
|
||||
Elf64_Byte r_ssym; /* Special symbol. */
|
||||
Elf64_Byte r_type3; /* Third relocation. */
|
||||
Elf64_Byte r_type2; /* Second relocation. */
|
||||
Elf64_Byte r_type; /* First relocation. */
|
||||
Elf64_Sxword r_addend; /* Addend. */
|
||||
typedef struct {
|
||||
Elf64_Addr r_offset; /* Address of relocation. */
|
||||
Elf64_Word r_sym; /* Symbol index. */
|
||||
Elf64_Byte r_ssym; /* Special symbol. */
|
||||
Elf64_Byte r_type3; /* Third relocation. */
|
||||
Elf64_Byte r_type2; /* Second relocation. */
|
||||
Elf64_Byte r_type; /* First relocation. */
|
||||
} Elf64_Mips_Rel;
|
||||
|
||||
typedef struct {
|
||||
Elf64_Addr r_offset; /* Address of relocation. */
|
||||
Elf64_Word r_sym; /* Symbol index. */
|
||||
Elf64_Byte r_ssym; /* Special symbol. */
|
||||
Elf64_Byte r_type3; /* Third relocation. */
|
||||
Elf64_Byte r_type2; /* Second relocation. */
|
||||
Elf64_Byte r_type; /* First relocation. */
|
||||
Elf64_Sxword r_addend; /* Addend. */
|
||||
} Elf64_Mips_Rela;
|
||||
|
||||
#ifdef CONFIG_32BIT
|
||||
|
|
@ -30,6 +38,13 @@ typedef struct
|
|||
#define Elf_Shdr Elf32_Shdr
|
||||
#define Elf_Sym Elf32_Sym
|
||||
#define Elf_Ehdr Elf32_Ehdr
|
||||
#define Elf_Addr Elf32_Addr
|
||||
|
||||
#define Elf_Mips_Rel Elf32_Rel
|
||||
#define Elf_Mips_Rela Elf32_Rela
|
||||
|
||||
#define ELF_MIPS_R_SYM(rel) ELF32_R_SYM(rel.r_info)
|
||||
#define ELF_MIPS_R_TYPE(rel) ELF32_R_TYPE(rel.r_info)
|
||||
|
||||
#endif
|
||||
|
||||
|
|
@ -38,6 +53,13 @@ typedef struct
|
|||
#define Elf_Shdr Elf64_Shdr
|
||||
#define Elf_Sym Elf64_Sym
|
||||
#define Elf_Ehdr Elf64_Ehdr
|
||||
#define Elf_Addr Elf64_Addr
|
||||
|
||||
#define Elf_Mips_Rel Elf64_Mips_Rel
|
||||
#define Elf_Mips_Rela Elf64_Mips_Rela
|
||||
|
||||
#define ELF_MIPS_R_SYM(rel) (rel.r_sym)
|
||||
#define ELF_MIPS_R_TYPE(rel) (rel.r_type)
|
||||
|
||||
#endif
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue