// SPDX-License-Identifier: GPL-2.0/* Kernel module help for sparc64. * * Copyright (C) 2001 Rusty Russell. * Copyright (C) 2002 David S. Miller. */ #include <linux/moduleloader.h>#include <linux/kernel.h>#include <linux/elf.h>#include <linux/vmalloc.h>#include <linux/fs.h>#include <linux/gfp.h>#include <linux/string.h>#include <linux/ctype.h>#include <linux/mm.h> #include <asm/processor.h>#include <asm/spitfire.h>#include <asm/cacheflush.h> #include "entry.h" /* Make generic code ignore STT_REGISTER dummy undefined symbols.  */int module_frob_arch_sections(Elf_Ehdr *hdr,			      Elf_Shdr *sechdrs,			      char *secstrings,			      struct module *mod){	unsigned int symidx;	Elf_Sym *sym;	int i; 	for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {		if (symidx == hdr->e_shnum-1) {			printk("%s: no symtab found.\n", mod->name);			return -ENOEXEC;		}	}	sym = (Elf_Sym *)sechdrs[symidx].sh_addr; 	for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {		if (sym[i].st_shndx == SHN_UNDEF) {			if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER)				sym[i].st_shndx = SHN_ABS;		}	}	return 0;} int apply_relocate_add(Elf_Shdr *sechdrs,		       const char *strtab,		       unsigned int symindex,		       unsigned int relsec,		       struct module *me){	unsigned int i;	Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;	Elf_Sym *sym;	u8 *location;	u32 *loc32; 	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {		Elf_Addr v; 		/* This is where to make the change */		location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr			+ rel[i].r_offset;		loc32 = (u32 *) location; #ifdef CONFIG_SPARC64		BUG_ON(((u64)location >> (u64)32) != (u64)0);#endif /* CONFIG_SPARC64 */ 		/* This is the symbol it is referring to.  Note that all		   undefined symbols have been resolved.  */		sym = (Elf_Sym *)sechdrs[symindex].sh_addr			+ ELF_R_SYM(rel[i].r_info);		v = sym->st_value + rel[i].r_addend; 		switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {		case R_SPARC_DISP32:			v -= (Elf_Addr) location;			*loc32 = v;			break;#ifdef CONFIG_SPARC64		case R_SPARC_64:		case R_SPARC_UA64:			location[0] = v >> 56;			location[1] = v >> 48;			location[2] = v >> 40;			location[3] = v >> 32;			location[4] = v >> 24;			location[5] = v >> 16;			location[6] = v >>  8;			location[7] = v >>  0;			break; 		case R_SPARC_WDISP19:			v -= (Elf_Addr) location;			*loc32 = (*loc32 & ~0x7ffff) |				((v >> 2) & 0x7ffff);			break; 		case R_SPARC_OLO10:			*loc32 = (*loc32 & ~0x1fff) |				(((v & 0x3ff) +				  (ELF_R_TYPE(rel[i].r_info) >> 8))				 & 0x1fff);			break;#endif /* CONFIG_SPARC64 */ 		case R_SPARC_32:		case R_SPARC_UA32:			location[0] = v >> 24;			location[1] = v >> 16;			location[2] = v >>  8;			location[3] = v >>  0;			break; 		case R_SPARC_WDISP30:			v -= (Elf_Addr) location;			*loc32 = (*loc32 & ~0x3fffffff) |				((v >> 2) & 0x3fffffff);			break; 		case R_SPARC_WDISP22:			v -= (Elf_Addr) location;			*loc32 = (*loc32 & ~0x3fffff) |				((v >> 2) & 0x3fffff);			break; 		case R_SPARC_LO10:			*loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);			break; 		case R_SPARC_HI22:			*loc32 = (*loc32 & ~0x3fffff) |				((v >> 10) & 0x3fffff);			break; 		default:			printk(KERN_ERR "module %s: Unknown relocation: 0x%x\n",			       me->name,			       (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));			return -ENOEXEC;		}	}	return 0;} #ifdef CONFIG_SPARC64static void do_patch_sections(const Elf_Ehdr *hdr,			      const Elf_Shdr *sechdrs){	const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;	char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; 	for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {		if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))			sun4v_1insn = s;		if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))			sun4v_2insn = s;	} 	if (sun4v_1insn && tlb_type == hypervisor) {		void *p = (void *) sun4v_1insn->sh_addr;		sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);	}	if (sun4v_2insn && tlb_type == hypervisor) {		void *p = (void *) sun4v_2insn->sh_addr;		sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);	}} int module_finalize(const Elf_Ehdr *hdr,		    const Elf_Shdr *sechdrs,		    struct module *me){	do_patch_sections(hdr, sechdrs); 	/* Cheetah's I-cache is fully coherent.  */	if (tlb_type == spitfire) {		unsigned long va; 		flushw_all();		for (va =  0; va < (PAGE_SIZE << 1); va += 32)			spitfire_put_icache_tag(va, 0x0);		__asm__ __volatile__("flush %g6");	} 	return 0;}#endif /* CONFIG_SPARC64 */