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278 lines
7.3 KiB
278 lines
7.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) 2005-2017 Andes Technology Corporation |
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#include <linux/module.h> |
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#include <linux/elf.h> |
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#include <linux/vmalloc.h> |
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#include <linux/moduleloader.h> |
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#include <linux/pgtable.h> |
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void *module_alloc(unsigned long size) |
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{ |
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return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, |
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GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, |
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__builtin_return_address(0)); |
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} |
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void module_free(struct module *module, void *region) |
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{ |
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vfree(region); |
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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, struct module *mod) |
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{ |
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return 0; |
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} |
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void do_reloc16(unsigned int val, unsigned int *loc, unsigned int val_mask, |
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unsigned int val_shift, unsigned int loc_mask, |
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unsigned int partial_in_place, unsigned int swap) |
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{ |
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unsigned int tmp = 0, tmp2 = 0; |
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__asm__ __volatile__("\tlhi.bi\t%0, [%2], 0\n" |
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"\tbeqz\t%3, 1f\n" |
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"\twsbh\t%0, %1\n" |
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"1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap) |
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); |
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tmp2 = tmp & loc_mask; |
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if (partial_in_place) { |
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tmp &= (~loc_mask); |
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tmp = |
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tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask); |
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} else { |
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tmp = tmp2 | ((val & val_mask) >> val_shift); |
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} |
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__asm__ __volatile__("\tbeqz\t%3, 2f\n" |
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"\twsbh\t%0, %1\n" |
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"2:\n" |
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"\tshi.bi\t%0, [%2], 0\n":"=r"(tmp):"0"(tmp), |
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"r"(loc), "r"(swap) |
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); |
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} |
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void do_reloc32(unsigned int val, unsigned int *loc, unsigned int val_mask, |
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unsigned int val_shift, unsigned int loc_mask, |
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unsigned int partial_in_place, unsigned int swap) |
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{ |
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unsigned int tmp = 0, tmp2 = 0; |
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__asm__ __volatile__("\tlmw.bi\t%0, [%2], %0, 0\n" |
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"\tbeqz\t%3, 1f\n" |
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"\twsbh\t%0, %1\n" |
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"\trotri\t%0, %1, 16\n" |
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"1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap) |
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); |
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tmp2 = tmp & loc_mask; |
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if (partial_in_place) { |
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tmp &= (~loc_mask); |
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tmp = |
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tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask); |
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} else { |
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tmp = tmp2 | ((val & val_mask) >> val_shift); |
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} |
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__asm__ __volatile__("\tbeqz\t%3, 2f\n" |
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"\twsbh\t%0, %1\n" |
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"\trotri\t%0, %1, 16\n" |
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"2:\n" |
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"\tsmw.bi\t%0, [%2], %0, 0\n":"=r"(tmp):"0"(tmp), |
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"r"(loc), "r"(swap) |
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); |
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} |
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static inline int exceed_limit(int offset, unsigned int val_mask, |
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struct module *module, Elf32_Rela * rel, |
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unsigned int relindex, unsigned int reloc_order) |
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{ |
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int abs_off = offset < 0 ? ~offset : offset; |
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if (abs_off & (~val_mask)) { |
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pr_err("\n%s: relocation type %d out of range.\n" |
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"please rebuild the kernel module with gcc option \"-Wa,-mno-small-text\".\n", |
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module->name, ELF32_R_TYPE(rel->r_info)); |
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pr_err("section %d reloc %d offset 0x%x relative 0x%x.\n", |
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relindex, reloc_order, rel->r_offset, offset); |
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return true; |
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} |
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return false; |
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} |
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#ifdef __NDS32_EL__ |
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#define NEED_SWAP 1 |
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#else |
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#define NEED_SWAP 0 |
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#endif |
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int |
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apply_relocate_add(Elf32_Shdr * sechdrs, const char *strtab, |
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unsigned int symindex, unsigned int relindex, |
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struct module *module) |
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{ |
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Elf32_Shdr *symsec = sechdrs + symindex; |
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Elf32_Shdr *relsec = sechdrs + relindex; |
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Elf32_Shdr *dstsec = sechdrs + relsec->sh_info; |
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Elf32_Rela *rel = (void *)relsec->sh_addr; |
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unsigned int i; |
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for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) { |
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Elf32_Addr *loc; |
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Elf32_Sym *sym; |
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Elf32_Addr v; |
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s32 offset; |
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offset = ELF32_R_SYM(rel->r_info); |
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if (offset < 0 |
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|| offset > (symsec->sh_size / sizeof(Elf32_Sym))) { |
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pr_err("%s: bad relocation\n", module->name); |
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pr_err("section %d reloc %d\n", relindex, i); |
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return -ENOEXEC; |
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} |
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sym = ((Elf32_Sym *) symsec->sh_addr) + offset; |
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if (rel->r_offset < 0 |
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|| rel->r_offset > dstsec->sh_size - sizeof(u16)) { |
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pr_err("%s: out of bounds relocation\n", module->name); |
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pr_err("section %d reloc %d offset 0x%0x size %d\n", |
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relindex, i, rel->r_offset, dstsec->sh_size); |
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return -ENOEXEC; |
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} |
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loc = (Elf32_Addr *) (dstsec->sh_addr + rel->r_offset); |
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v = sym->st_value + rel->r_addend; |
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switch (ELF32_R_TYPE(rel->r_info)) { |
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case R_NDS32_NONE: |
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case R_NDS32_INSN16: |
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case R_NDS32_LABEL: |
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case R_NDS32_LONGCALL1: |
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case R_NDS32_LONGCALL2: |
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case R_NDS32_LONGCALL3: |
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case R_NDS32_LONGCALL4: |
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case R_NDS32_LONGJUMP1: |
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case R_NDS32_LONGJUMP2: |
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case R_NDS32_LONGJUMP3: |
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case R_NDS32_9_FIXED_RELA: |
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case R_NDS32_15_FIXED_RELA: |
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case R_NDS32_17_FIXED_RELA: |
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case R_NDS32_25_FIXED_RELA: |
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case R_NDS32_LOADSTORE: |
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case R_NDS32_DWARF2_OP1_RELA: |
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case R_NDS32_DWARF2_OP2_RELA: |
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case R_NDS32_DWARF2_LEB_RELA: |
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case R_NDS32_RELA_NOP_MIX ... R_NDS32_RELA_NOP_MAX: |
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break; |
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case R_NDS32_32_RELA: |
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do_reloc32(v, loc, 0xffffffff, 0, 0, 0, 0); |
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break; |
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case R_NDS32_HI20_RELA: |
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do_reloc32(v, loc, 0xfffff000, 12, 0xfff00000, 0, |
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NEED_SWAP); |
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break; |
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case R_NDS32_LO12S3_RELA: |
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do_reloc32(v, loc, 0x00000fff, 3, 0xfffff000, 0, |
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NEED_SWAP); |
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break; |
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case R_NDS32_LO12S2_RELA: |
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do_reloc32(v, loc, 0x00000fff, 2, 0xfffff000, 0, |
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NEED_SWAP); |
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break; |
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case R_NDS32_LO12S1_RELA: |
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do_reloc32(v, loc, 0x00000fff, 1, 0xfffff000, 0, |
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NEED_SWAP); |
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break; |
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case R_NDS32_LO12S0_RELA: |
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case R_NDS32_LO12S0_ORI_RELA: |
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do_reloc32(v, loc, 0x00000fff, 0, 0xfffff000, 0, |
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NEED_SWAP); |
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break; |
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case R_NDS32_9_PCREL_RELA: |
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if (exceed_limit |
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((v - (Elf32_Addr) loc), 0x000000ff, module, rel, |
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relindex, i)) |
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return -ENOEXEC; |
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do_reloc16(v - (Elf32_Addr) loc, loc, 0x000001ff, 1, |
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0xffffff00, 0, NEED_SWAP); |
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break; |
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case R_NDS32_15_PCREL_RELA: |
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if (exceed_limit |
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((v - (Elf32_Addr) loc), 0x00003fff, module, rel, |
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relindex, i)) |
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return -ENOEXEC; |
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do_reloc32(v - (Elf32_Addr) loc, loc, 0x00007fff, 1, |
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0xffffc000, 0, NEED_SWAP); |
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break; |
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case R_NDS32_17_PCREL_RELA: |
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if (exceed_limit |
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((v - (Elf32_Addr) loc), 0x0000ffff, module, rel, |
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relindex, i)) |
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return -ENOEXEC; |
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do_reloc32(v - (Elf32_Addr) loc, loc, 0x0001ffff, 1, |
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0xffff0000, 0, NEED_SWAP); |
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break; |
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case R_NDS32_25_PCREL_RELA: |
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if (exceed_limit |
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((v - (Elf32_Addr) loc), 0x00ffffff, module, rel, |
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relindex, i)) |
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return -ENOEXEC; |
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do_reloc32(v - (Elf32_Addr) loc, loc, 0x01ffffff, 1, |
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0xff000000, 0, NEED_SWAP); |
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break; |
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case R_NDS32_WORD_9_PCREL_RELA: |
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if (exceed_limit |
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((v - (Elf32_Addr) loc), 0x000000ff, module, rel, |
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relindex, i)) |
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return -ENOEXEC; |
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do_reloc32(v - (Elf32_Addr) loc, loc, 0x000001ff, 1, |
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0xffffff00, 0, NEED_SWAP); |
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break; |
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case R_NDS32_SDA15S3_RELA: |
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case R_NDS32_SDA15S2_RELA: |
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case R_NDS32_SDA15S1_RELA: |
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case R_NDS32_SDA15S0_RELA: |
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pr_err("%s: unsupported relocation type %d.\n", |
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module->name, ELF32_R_TYPE(rel->r_info)); |
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pr_err |
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("Small data section access doesn't work in the kernel space; " |
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"please rebuild the kernel module with gcc option -mcmodel=large.\n"); |
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pr_err("section %d reloc %d offset 0x%x size %d\n", |
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relindex, i, rel->r_offset, dstsec->sh_size); |
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break; |
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default: |
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pr_err("%s: unsupported relocation type %d.\n", |
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module->name, ELF32_R_TYPE(rel->r_info)); |
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pr_err("section %d reloc %d offset 0x%x size %d\n", |
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relindex, i, rel->r_offset, dstsec->sh_size); |
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} |
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} |
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return 0; |
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} |
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int |
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module_finalize(const Elf32_Ehdr * hdr, const Elf_Shdr * sechdrs, |
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struct module *module) |
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{ |
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return 0; |
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} |
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void module_arch_cleanup(struct module *mod) |
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{ |
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}
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