/* Kernel module help for sparc32. * * 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/string.h> void *module_alloc(unsigned long size) { void *ret; /* We handle the zero case fine, unlike vmalloc */ if (size == 0) return NULL; ret = vmalloc(size); if (!ret) ret = ERR_PTR(-ENOMEM); else memset(ret, 0, size); return ret; } /* Free memory returned from module_core_alloc/module_init_alloc */ void module_free(struct module *mod, void *module_region) { vfree(module_region); /* FIXME: If module_region == mod->init_region, trim exception table entries. */ } /* We don't need anything special. */ long module_core_size(const Elf32_Ehdr *hdr, const Elf32_Shdr *sechdrs, const char *secstrings, struct module *module) { return module->core_size; } long module_init_size(const Elf32_Ehdr *hdr, const Elf32_Shdr *sechdrs, const char *secstrings, struct module *module) { return module->init_size; } int apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relsec, struct module *me) { printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n", me->name); return -ENOEXEC; } int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relsec, struct module *me) { unsigned int i; Elf32_Rela *rel = (void *)sechdrs[relsec].sh_offset; Elf32_Sym *sym; u8 *location; u32 *loc32; for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { Elf32_Addr v; /* This is where to make the change */ location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_offset + rel[i].r_offset; loc32 = (u32 *) location; /* This is the symbol it is referring to */ sym = (Elf32_Sym *)sechdrs[symindex].sh_offset + ELF32_R_SYM(rel[i].r_info); if (!(v = sym->st_value)) { printk(KERN_WARNING "%s: Unknown symbol %s\n", me->name, strtab + sym->st_name); return -ENOENT; } v += rel[i].r_addend; switch (ELF32_R_TYPE(rel[i].r_info)) { case R_SPARC_32: location[0] = v >> 24; location[1] = v >> 16; location[2] = v >> 8; location[3] = v >> 0; break; case R_SPARC_WDISP30: v -= (Elf32_Addr) location; *loc32 = (*loc32 & ~0x3fffffff) | ((v >> 2) & 0x3fffffff); break; case R_SPARC_WDISP22: v -= (Elf32_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: %x\n", me->name, (int) (ELF32_R_TYPE(rel[i].r_info) & 0xff)); return -ENOEXEC; }; } return 0; } int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { return 0; }