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-rw-r--r--arch/mips/kernel/module-elf64.c274
1 files changed, 0 insertions, 274 deletions
diff --git a/arch/mips/kernel/module-elf64.c b/arch/mips/kernel/module-elf64.c
deleted file mode 100644
index e804792ee1ee..000000000000
--- a/arch/mips/kernel/module-elf64.c
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- * 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)
- */
-
-#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>
-
-struct mips_hi16 {
- struct mips_hi16 *next;
- Elf32_Addr *addr;
- Elf64_Addr value;
-};
-
-static struct mips_hi16 *mips_hi16_list;
-
-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;
-}
-
-int apply_relocate(Elf64_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- /*
- * We don't want to deal with REL relocations - RELA is so much saner.
- */
- if (!sechdrs[relsec].sh_size)
- return 0;
-
- printk(KERN_ERR "module %s: REL relocation unsupported\n",
- me->name);
- return -ENOEXEC;
-}
-
-static int apply_r_mips_none(struct module *me, uint32_t *location,
- Elf64_Addr v)
-{
- return 0;
-}
-
-static int apply_r_mips_32(struct module *me, uint32_t *location,
- Elf64_Addr v)
-{
- *location = v;
-
- return 0;
-}
-
-static int apply_r_mips_26(struct module *me, uint32_t *location,
- Elf64_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(struct module *me, uint32_t *location,
- Elf64_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 = location;
- n->value = v;
- n->next = mips_hi16_list;
- mips_hi16_list = n;
-
- return 0;
-}
-
-static int apply_r_mips_lo16(struct module *me, uint32_t *location,
- Elf64_Addr v)
-{
- unsigned long insnlo = *location;
- Elf32_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.
- */
- insnlo = (insnlo & ~0xffff) | (v & 0xffff);
- *location = insnlo;
-
- return 0;
-
-out_danger:
- printk(KERN_ERR "module %s: dangerous " "relocation\n", me->name);
-
- return -ENOEXEC;
-}
-
-static int apply_r_mips_64(struct module *me, uint32_t *location,
- Elf64_Addr v)
-{
- *(uint64_t *) location = v;
-
- return 0;
-}
-
-
-static int apply_r_mips_higher(struct module *me, uint32_t *location,
- Elf64_Addr v)
-{
- *location = (*location & 0xffff0000) |
- ((((long long) v + 0x80008000LL) >> 32) & 0xffff);
-
- return 0;
-}
-
-static int apply_r_mips_highest(struct module *me, uint32_t *location,
- Elf64_Addr v)
-{
- *location = (*location & 0xffff0000) |
- ((((long long) v + 0x800080008000LL) >> 48) & 0xffff);
-
- return 0;
-}
-
-static int (*reloc_handlers[]) (struct module *me, uint32_t *location,
- Elf64_Addr v) = {
- [R_MIPS_NONE] = apply_r_mips_none,
- [R_MIPS_32] = apply_r_mips_32,
- [R_MIPS_26] = apply_r_mips_26,
- [R_MIPS_HI16] = apply_r_mips_hi16,
- [R_MIPS_LO16] = apply_r_mips_lo16,
- [R_MIPS_64] = apply_r_mips_64,
- [R_MIPS_HIGHER] = apply_r_mips_higher,
- [R_MIPS_HIGHEST] = apply_r_mips_highest
-};
-
-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;
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.