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