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228 lines
5.2 KiB
228 lines
5.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Kernel module help for sparc64. |
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* |
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* Copyright (C) 2001 Rusty Russell. |
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* Copyright (C) 2002 David S. Miller. |
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*/ |
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#include <linux/moduleloader.h> |
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#include <linux/kernel.h> |
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#include <linux/elf.h> |
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#include <linux/vmalloc.h> |
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#include <linux/fs.h> |
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#include <linux/gfp.h> |
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#include <linux/string.h> |
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#include <linux/ctype.h> |
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#include <linux/mm.h> |
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#include <asm/processor.h> |
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#include <asm/spitfire.h> |
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#include <asm/cacheflush.h> |
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#include "entry.h" |
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#ifdef CONFIG_SPARC64 |
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#include <linux/jump_label.h> |
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static void *module_map(unsigned long size) |
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{ |
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if (PAGE_ALIGN(size) > MODULES_LEN) |
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return NULL; |
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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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#else |
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static void *module_map(unsigned long size) |
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{ |
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return vmalloc(size); |
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} |
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#endif /* CONFIG_SPARC64 */ |
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void *module_alloc(unsigned long size) |
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{ |
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void *ret; |
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ret = module_map(size); |
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if (ret) |
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memset(ret, 0, size); |
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return ret; |
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} |
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/* Make generic code ignore STT_REGISTER dummy undefined symbols. */ |
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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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unsigned int symidx; |
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Elf_Sym *sym; |
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char *strtab; |
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int i; |
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for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) { |
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if (symidx == hdr->e_shnum-1) { |
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printk("%s: no symtab found.\n", mod->name); |
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return -ENOEXEC; |
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} |
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} |
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sym = (Elf_Sym *)sechdrs[symidx].sh_addr; |
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strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr; |
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for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) { |
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if (sym[i].st_shndx == SHN_UNDEF) { |
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if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) |
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sym[i].st_shndx = SHN_ABS; |
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} |
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} |
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return 0; |
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} |
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int apply_relocate_add(Elf_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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unsigned int i; |
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Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr; |
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Elf_Sym *sym; |
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u8 *location; |
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u32 *loc32; |
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for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { |
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Elf_Addr v; |
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/* This is where to make the change */ |
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location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr |
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+ rel[i].r_offset; |
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loc32 = (u32 *) location; |
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#ifdef CONFIG_SPARC64 |
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BUG_ON(((u64)location >> (u64)32) != (u64)0); |
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#endif /* CONFIG_SPARC64 */ |
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/* This is the symbol it is referring to. Note that all |
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undefined symbols have been resolved. */ |
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sym = (Elf_Sym *)sechdrs[symindex].sh_addr |
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+ ELF_R_SYM(rel[i].r_info); |
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v = sym->st_value + rel[i].r_addend; |
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switch (ELF_R_TYPE(rel[i].r_info) & 0xff) { |
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case R_SPARC_DISP32: |
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v -= (Elf_Addr) location; |
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*loc32 = v; |
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break; |
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#ifdef CONFIG_SPARC64 |
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case R_SPARC_64: |
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location[0] = v >> 56; |
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location[1] = v >> 48; |
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location[2] = v >> 40; |
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location[3] = v >> 32; |
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location[4] = v >> 24; |
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location[5] = v >> 16; |
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location[6] = v >> 8; |
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location[7] = v >> 0; |
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break; |
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case R_SPARC_WDISP19: |
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v -= (Elf_Addr) location; |
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*loc32 = (*loc32 & ~0x7ffff) | |
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((v >> 2) & 0x7ffff); |
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break; |
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case R_SPARC_OLO10: |
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*loc32 = (*loc32 & ~0x1fff) | |
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(((v & 0x3ff) + |
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(ELF_R_TYPE(rel[i].r_info) >> 8)) |
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& 0x1fff); |
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break; |
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#endif /* CONFIG_SPARC64 */ |
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case R_SPARC_32: |
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case R_SPARC_UA32: |
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location[0] = v >> 24; |
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location[1] = v >> 16; |
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location[2] = v >> 8; |
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location[3] = v >> 0; |
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break; |
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case R_SPARC_WDISP30: |
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v -= (Elf_Addr) location; |
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*loc32 = (*loc32 & ~0x3fffffff) | |
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((v >> 2) & 0x3fffffff); |
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break; |
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case R_SPARC_WDISP22: |
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v -= (Elf_Addr) location; |
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*loc32 = (*loc32 & ~0x3fffff) | |
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((v >> 2) & 0x3fffff); |
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break; |
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case R_SPARC_LO10: |
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*loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff); |
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break; |
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case R_SPARC_HI22: |
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*loc32 = (*loc32 & ~0x3fffff) | |
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((v >> 10) & 0x3fffff); |
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break; |
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default: |
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printk(KERN_ERR "module %s: Unknown relocation: %x\n", |
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me->name, |
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(int) (ELF_R_TYPE(rel[i].r_info) & 0xff)); |
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return -ENOEXEC; |
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} |
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} |
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return 0; |
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} |
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#ifdef CONFIG_SPARC64 |
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static void do_patch_sections(const Elf_Ehdr *hdr, |
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const Elf_Shdr *sechdrs) |
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{ |
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const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL; |
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char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; |
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for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { |
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if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name)) |
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sun4v_1insn = s; |
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if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name)) |
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sun4v_2insn = s; |
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} |
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if (sun4v_1insn && tlb_type == hypervisor) { |
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void *p = (void *) sun4v_1insn->sh_addr; |
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sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size); |
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} |
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if (sun4v_2insn && tlb_type == hypervisor) { |
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void *p = (void *) sun4v_2insn->sh_addr; |
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sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size); |
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} |
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} |
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int module_finalize(const Elf_Ehdr *hdr, |
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const Elf_Shdr *sechdrs, |
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struct module *me) |
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{ |
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/* make jump label nops */ |
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jump_label_apply_nops(me); |
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do_patch_sections(hdr, sechdrs); |
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/* Cheetah's I-cache is fully coherent. */ |
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if (tlb_type == spitfire) { |
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unsigned long va; |
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flushw_all(); |
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for (va = 0; va < (PAGE_SIZE << 1); va += 32) |
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spitfire_put_icache_tag(va, 0x0); |
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__asm__ __volatile__("flush %g6"); |
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} |
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return 0; |
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} |
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#endif /* CONFIG_SPARC64 */
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