diff options
Diffstat (limited to 'target/linux/sibyte/patches-3.3/106-no_module_reloc.patch')
| -rw-r--r-- | target/linux/sibyte/patches-3.3/106-no_module_reloc.patch | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/target/linux/sibyte/patches-3.3/106-no_module_reloc.patch b/target/linux/sibyte/patches-3.3/106-no_module_reloc.patch new file mode 100644 index 000000000..8082c3d02 --- /dev/null +++ b/target/linux/sibyte/patches-3.3/106-no_module_reloc.patch @@ -0,0 +1,370 @@ +--- a/arch/mips/Makefile ++++ b/arch/mips/Makefile +@@ -90,8 +90,8 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin + cflags-y += -G 0 -mno-abicalls -fno-pic -pipe + cflags-y += -msoft-float + LDFLAGS_vmlinux += -G 0 -static -n -nostdlib +-KBUILD_AFLAGS_MODULE += -mno-long-calls +-KBUILD_CFLAGS_MODULE += -mno-long-calls ++KBUILD_AFLAGS_MODULE += -mlong-calls ++KBUILD_CFLAGS_MODULE += -mlong-calls + + cflags-y += -ffreestanding + +--- a/arch/mips/include/asm/module.h ++++ b/arch/mips/include/asm/module.h +@@ -9,11 +9,6 @@ struct mod_arch_specific { + struct list_head dbe_list; + const struct exception_table_entry *dbe_start; + const struct exception_table_entry *dbe_end; +- +- void *phys_plt_tbl; +- void *virt_plt_tbl; +- unsigned int phys_plt_offset; +- unsigned int virt_plt_offset; + }; + + typedef uint8_t Elf64_Byte; /* Type for a 8-bit quantity. */ +--- a/arch/mips/kernel/module.c ++++ b/arch/mips/kernel/module.c +@@ -44,117 +44,6 @@ static struct mips_hi16 *mips_hi16_list; + static LIST_HEAD(dbe_list); + static DEFINE_SPINLOCK(dbe_lock); + +-/* +- * Get the potential max trampolines size required of the init and +- * non-init sections. Only used if we cannot find enough contiguous +- * physically mapped memory to put the module into. +- */ +-static unsigned int +-get_plt_size(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, +- const char *secstrings, unsigned int symindex, bool is_init) +-{ +- unsigned long ret = 0; +- unsigned int i, j; +- Elf_Sym *syms; +- +- /* Everything marked ALLOC (this includes the exported symbols) */ +- for (i = 1; i < hdr->e_shnum; ++i) { +- unsigned int info = sechdrs[i].sh_info; +- +- if (sechdrs[i].sh_type != SHT_REL +- && sechdrs[i].sh_type != SHT_RELA) +- continue; +- +- /* Not a valid relocation section? */ +- if (info >= hdr->e_shnum) +- continue; +- +- /* Don't bother with non-allocated sections */ +- if (!(sechdrs[info].sh_flags & SHF_ALLOC)) +- continue; +- +- /* If it's called *.init*, and we're not init, we're +- not interested */ +- if ((strstr(secstrings + sechdrs[i].sh_name, ".init") != 0) +- != is_init) +- continue; +- +- syms = (Elf_Sym *) sechdrs[symindex].sh_addr; +- if (sechdrs[i].sh_type == SHT_REL) { +- Elf_Mips_Rel *rel = (void *) sechdrs[i].sh_addr; +- unsigned int size = sechdrs[i].sh_size / sizeof(*rel); +- +- for (j = 0; j < size; ++j) { +- Elf_Sym *sym; +- +- if (ELF_MIPS_R_TYPE(rel[j]) != R_MIPS_26) +- continue; +- +- sym = syms + ELF_MIPS_R_SYM(rel[j]); +- if (!is_init && sym->st_shndx != SHN_UNDEF) +- continue; +- +- ret += 4 * sizeof(int); +- } +- } else { +- Elf_Mips_Rela *rela = (void *) sechdrs[i].sh_addr; +- unsigned int size = sechdrs[i].sh_size / sizeof(*rela); +- +- for (j = 0; j < size; ++j) { +- Elf_Sym *sym; +- +- if (ELF_MIPS_R_TYPE(rela[j]) != R_MIPS_26) +- continue; +- +- sym = syms + ELF_MIPS_R_SYM(rela[j]); +- if (!is_init && sym->st_shndx != SHN_UNDEF) +- continue; +- +- ret += 4 * sizeof(int); +- } +- } +- } +- +- return ret; +-} +- +-#ifndef MODULE_START +-static void *alloc_phys(unsigned long size) +-{ +- unsigned order; +- struct page *page; +- struct page *p; +- +- size = PAGE_ALIGN(size); +- order = get_order(size); +- +- page = alloc_pages(GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN | +- __GFP_THISNODE, order); +- if (!page) +- return NULL; +- +- split_page(page, order); +- +- for (p = page + (size >> PAGE_SHIFT); p < page + (1 << order); ++p) +- __free_page(p); +- +- return page_address(page); +-} +-#endif +- +-static void free_phys(void *ptr, unsigned long size) +-{ +- struct page *page; +- struct page *end; +- +- page = virt_to_page(ptr); +- end = page + (PAGE_ALIGN(size) >> PAGE_SHIFT); +- +- for (; page < end; ++page) +- __free_page(page); +-} +- +- + void *module_alloc(unsigned long size) + { + #ifdef MODULE_START +@@ -162,99 +51,21 @@ void *module_alloc(unsigned long size) + GFP_KERNEL, PAGE_KERNEL, -1, + __builtin_return_address(0)); + #else +- void *ptr; +- + if (size == 0) + return NULL; +- +- ptr = alloc_phys(size); +- +- /* If we failed to allocate physically contiguous memory, +- * fall back to regular vmalloc. The module loader code will +- * create jump tables to handle long jumps */ +- if (!ptr) +- return vmalloc(size); +- +- return ptr; +-#endif +-} +- +-static inline bool is_phys_addr(void *ptr) +-{ +-#ifdef CONFIG_64BIT +- return (KSEGX((unsigned long)ptr) == CKSEG0); +-#else +- return (KSEGX(ptr) == KSEG0); ++ return vmalloc(size); + #endif + } + + /* Free memory returned from module_alloc */ + void module_free(struct module *mod, void *module_region) + { +- if (is_phys_addr(module_region)) { +- if (mod->module_init == module_region) +- free_phys(module_region, mod->init_size); +- else if (mod->module_core == module_region) +- free_phys(module_region, mod->core_size); +- else +- BUG(); +- } else { +- vfree(module_region); +- } +-} +- +-static void *__module_alloc(int size, bool phys) +-{ +- void *ptr; +- +- if (phys) +- ptr = kmalloc(size, GFP_KERNEL); +- else +- ptr = vmalloc(size); +- return ptr; +-} +- +-static void __module_free(void *ptr) +-{ +- if (is_phys_addr(ptr)) +- kfree(ptr); +- else +- vfree(ptr); ++ vfree(module_region); + } + + int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, + char *secstrings, struct module *mod) + { +- unsigned int symindex = 0; +- unsigned int core_size, init_size; +- int i; +- +- for (i = 1; i < hdr->e_shnum; i++) +- if (sechdrs[i].sh_type == SHT_SYMTAB) +- symindex = i; +- +- core_size = get_plt_size(hdr, sechdrs, secstrings, symindex, false); +- init_size = get_plt_size(hdr, sechdrs, secstrings, symindex, true); +- +- mod->arch.phys_plt_offset = 0; +- mod->arch.virt_plt_offset = 0; +- mod->arch.phys_plt_tbl = NULL; +- mod->arch.virt_plt_tbl = NULL; +- +- if ((core_size + init_size) == 0) +- return 0; +- +- mod->arch.phys_plt_tbl = __module_alloc(core_size + init_size, 1); +- if (!mod->arch.phys_plt_tbl) +- return -ENOMEM; +- +- mod->arch.virt_plt_tbl = __module_alloc(core_size + init_size, 0); +- if (!mod->arch.virt_plt_tbl) { +- __module_free(mod->arch.phys_plt_tbl); +- mod->arch.phys_plt_tbl = NULL; +- return -ENOMEM; +- } +- + return 0; + } + +@@ -277,36 +88,28 @@ static int apply_r_mips_32_rela(struct m + return 0; + } + +-static Elf_Addr add_plt_entry_to(unsigned *plt_offset, +- void *start, Elf_Addr v) ++static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v) + { +- unsigned *tramp = start + *plt_offset; +- *plt_offset += 4 * sizeof(int); +- +- /* adjust carry for addiu */ +- if (v & 0x00008000) +- v += 0x10000; +- +- tramp[0] = 0x3c190000 | (v >> 16); /* lui t9, hi16 */ +- tramp[1] = 0x27390000 | (v & 0xffff); /* addiu t9, t9, lo16 */ +- tramp[2] = 0x03200008; /* jr t9 */ +- tramp[3] = 0x00000000; /* nop */ ++ if (v % 4) { ++ pr_err("module %s: dangerous R_MIPS_26 REL relocation\n", ++ me->name); ++ return -ENOEXEC; ++ } + +- return (Elf_Addr) tramp; +-} ++ if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { ++ printk(KERN_ERR ++ "module %s: relocation overflow\n", ++ me->name); ++ return -ENOEXEC; ++ } + +-static Elf_Addr add_plt_entry(struct module *me, void *location, Elf_Addr v) +-{ +- if (is_phys_addr(location)) +- return add_plt_entry_to(&me->arch.phys_plt_offset, +- me->arch.phys_plt_tbl, v); +- else +- return add_plt_entry_to(&me->arch.virt_plt_offset, +- me->arch.virt_plt_tbl, v); ++ *location = (*location & ~0x03ffffff) | ++ ((*location + (v >> 2)) & 0x03ffffff); + ++ return 0; + } + +-static int set_r_mips_26(struct module *me, u32 *location, u32 ofs, Elf_Addr v) ++static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v) + { + if (v % 4) { + pr_err("module %s: dangerous R_MIPS_26 RELArelocation\n", +@@ -315,31 +118,17 @@ static int set_r_mips_26(struct module * + } + + if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { +- v = add_plt_entry(me, location, v + (ofs << 2)); +- if (!v) { +- printk(KERN_ERR ++ printk(KERN_ERR + "module %s: relocation overflow\n", + me->name); +- return -ENOEXEC; +- } +- ofs = 0; ++ return -ENOEXEC; + } + +- *location = (*location & ~0x03ffffff) | ((ofs + (v >> 2)) & 0x03ffffff); ++ *location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff); + + return 0; + } + +-static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v) +-{ +- return set_r_mips_26(me, location, *location & 0x03ffffff, v); +-} +- +-static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v) +-{ +- return set_r_mips_26(me, location, 0, v); +-} +- + static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v) + { + struct mips_hi16 *n; +@@ -607,32 +396,11 @@ int module_finalize(const Elf_Ehdr *hdr, + list_add(&me->arch.dbe_list, &dbe_list); + spin_unlock_irq(&dbe_lock); + } +- +- /* Get rid of the fixup trampoline if we're running the module +- * from physically mapped address space */ +- if (me->arch.phys_plt_offset == 0) { +- __module_free(me->arch.phys_plt_tbl); +- me->arch.phys_plt_tbl = NULL; +- } +- if (me->arch.virt_plt_offset == 0) { +- __module_free(me->arch.virt_plt_tbl); +- me->arch.virt_plt_tbl = NULL; +- } +- + return 0; + } + + void module_arch_cleanup(struct module *mod) + { +- if (mod->arch.phys_plt_tbl) { +- __module_free(mod->arch.phys_plt_tbl); +- mod->arch.phys_plt_tbl = NULL; +- } +- if (mod->arch.virt_plt_tbl) { +- __module_free(mod->arch.virt_plt_tbl); +- mod->arch.virt_plt_tbl = NULL; +- } +- + spin_lock_irq(&dbe_lock); + list_del(&mod->arch.dbe_list); + spin_unlock_irq(&dbe_lock); |