diff options
Diffstat (limited to 'target/linux/generic/patches-3.13/305-mips_module_reloc.patch')
| -rw-r--r-- | target/linux/generic/patches-3.13/305-mips_module_reloc.patch | 352 |
1 files changed, 0 insertions, 352 deletions
diff --git a/target/linux/generic/patches-3.13/305-mips_module_reloc.patch b/target/linux/generic/patches-3.13/305-mips_module_reloc.patch deleted file mode 100644 index 2e92916f97..0000000000 --- a/target/linux/generic/patches-3.13/305-mips_module_reloc.patch +++ /dev/null @@ -1,352 +0,0 @@ ---- a/arch/mips/Makefile -+++ b/arch/mips/Makefile -@@ -90,8 +90,13 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin - cflags-y += -G 0 -mno-abicalls -fno-pic -pipe -mno-branch-likely - cflags-y += -msoft-float - LDFLAGS_vmlinux += -G 0 -static -n -nostdlib --gc-sections --sort-section=name -+ifdef CONFIG_64BIT - KBUILD_AFLAGS_MODULE += -mlong-calls - KBUILD_CFLAGS_MODULE += -mlong-calls -+else -+KBUILD_AFLAGS_MODULE += -mno-long-calls -+KBUILD_CFLAGS_MODULE += -mno-long-calls -+endif - - ifndef CONFIG_FUNCTION_TRACER - KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections ---- a/arch/mips/include/asm/module.h -+++ b/arch/mips/include/asm/module.h -@@ -11,6 +11,11 @@ struct mod_arch_specific { - const struct exception_table_entry *dbe_start; - const struct exception_table_entry *dbe_end; - struct mips_hi16 *r_mips_hi16_list; -+ -+ 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 -@@ -43,14 +43,222 @@ struct mips_hi16 { - static LIST_HEAD(dbe_list); - static DEFINE_SPINLOCK(dbe_lock); - --#ifdef MODULE_START -+/* -+ * 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 - return __vmalloc_node_range(size, 1, MODULE_START, MODULE_END, - GFP_KERNEL, PAGE_KERNEL, NUMA_NO_NODE, - __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); - #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); -+} -+ -+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; -+ -+ 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 (IS_ENABLED(CONFIG_64BIT)) -+ return 0; -+ -+ 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); -+ -+ 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; -+} - - int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v) - { -@@ -64,8 +272,39 @@ static int apply_r_mips_32_rel(struct mo - return 0; - } - -+static Elf_Addr add_plt_entry_to(unsigned *plt_offset, -+ void *start, 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 */ -+ -+ return (Elf_Addr) tramp; -+} -+ -+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); -+ -+} -+ - static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v) - { -+ u32 ofs = *location & 0x03ffffff; -+ - if (v % 4) { - pr_err("module %s: dangerous R_MIPS_26 REL relocation\n", - me->name); -@@ -73,14 +312,17 @@ static int apply_r_mips_26_rel(struct mo - } - - if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { -- printk(KERN_ERR -- "module %s: relocation overflow\n", -- me->name); -- return -ENOEXEC; -+ v = add_plt_entry(me, location, v + (ofs << 2)); -+ if (!v) { -+ printk(KERN_ERR -+ "module %s: relocation overflow\n", me->name); -+ return -ENOEXEC; -+ } -+ ofs = 0; - } - - *location = (*location & ~0x03ffffff) | -- ((*location + (v >> 2)) & 0x03ffffff); -+ ((ofs + (v >> 2)) & 0x03ffffff); - - return 0; - } -@@ -287,11 +529,32 @@ 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); |