From: Felix Fietkau Date: Mon, 14 Jan 2013 18:55:36 +0000 (+0000) Subject: kernel: port 203-kallsyms_uncompressed.patch and 305-mips_module_reloc.patch to 3.8 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=b3b04e9fb1af92e90fab2d437bed5a45b78c4380;p=librecmc%2Flibrecmc.git kernel: port 203-kallsyms_uncompressed.patch and 305-mips_module_reloc.patch to 3.8 SVN-Revision: 35162 --- diff --git a/target/linux/generic/patches-3.8/203-kallsyms_uncompressed.patch b/target/linux/generic/patches-3.8/203-kallsyms_uncompressed.patch new file mode 100644 index 0000000000..dbb4f8ffbe --- /dev/null +++ b/target/linux/generic/patches-3.8/203-kallsyms_uncompressed.patch @@ -0,0 +1,108 @@ +--- a/scripts/kallsyms.c ++++ b/scripts/kallsyms.c +@@ -54,6 +54,7 @@ static struct text_range text_ranges[] = + static struct sym_entry *table; + static unsigned int table_size, table_cnt; + static int all_symbols = 0; ++static int uncompressed = 0; + static char symbol_prefix_char = '\0'; + + int token_profit[0x10000]; +@@ -360,6 +361,9 @@ static void write_src(void) + + free(markers); + ++ if (uncompressed) ++ return; ++ + output_label("kallsyms_token_table"); + off = 0; + for (i = 0; i < 256; i++) { +@@ -418,6 +422,9 @@ static void *find_token(unsigned char *s + { + int i; + ++ if (uncompressed) ++ return NULL; ++ + for (i = 0; i < len - 1; i++) { + if (str[i] == token[0] && str[i+1] == token[1]) + return &str[i]; +@@ -490,6 +497,9 @@ static void optimize_result(void) + { + int i, best; + ++ if (uncompressed) ++ return; ++ + /* using the '\0' symbol last allows compress_symbols to use standard + * fast string functions */ + for (i = 255; i >= 0; i--) { +@@ -646,7 +656,9 @@ int main(int argc, char **argv) + if ((*p == '"' && *(p+2) == '"') || (*p == '\'' && *(p+2) == '\'')) + p++; + symbol_prefix_char = *p; +- } else ++ } else if (strcmp(argv[i], "--uncompressed") == 0) ++ uncompressed = 1; ++ else + usage(); + } + } else if (argc != 1) +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -1257,6 +1257,17 @@ config KALLSYMS_ALL + + Say N unless you really need all symbols. + ++config KALLSYMS_UNCOMPRESSED ++ bool "Keep kallsyms uncompressed" ++ depends on KALLSYMS ++ help ++ Normally kallsyms contains compressed symbols (using a token table), ++ reducing the uncompressed kernel image size. Keeping the symbol table ++ uncompressed significantly improves the size of this part in compressed ++ kernel images. ++ ++ Say N unless you need compressed kernel images to be small. ++ + config HOTPLUG + def_bool y + +--- a/scripts/link-vmlinux.sh ++++ b/scripts/link-vmlinux.sh +@@ -83,6 +83,10 @@ kallsyms() + kallsymopt="${kallsymopt} --all-symbols" + fi + ++ if [ -n "${CONFIG_KALLSYMS_UNCOMPRESSED}" ]; then ++ kallsymopt="${kallsymopt} --uncompressed" ++ fi ++ + local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \ + ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}" + +--- a/kernel/kallsyms.c ++++ b/kernel/kallsyms.c +@@ -106,6 +106,11 @@ static unsigned int kallsyms_expand_symb + * For every byte on the compressed symbol data, copy the table + * entry for that byte. + */ ++#ifdef CONFIG_KALLSYMS_UNCOMPRESSED ++ memcpy(result, data + 1, len - 1); ++ result += len - 1; ++ len = 0; ++#endif + while (len) { + tptr = &kallsyms_token_table[kallsyms_token_index[*data]]; + data++; +@@ -133,6 +138,9 @@ static unsigned int kallsyms_expand_symb + */ + static char kallsyms_get_symbol_type(unsigned int off) + { ++#ifdef CONFIG_KALLSYMS_UNCOMPRESSED ++ return kallsyms_names[off + 1]; ++#endif + /* + * Get just the first code, look it up in the token table, + * and return the first char from this token. diff --git a/target/linux/generic/patches-3.8/305-mips_module_reloc.patch b/target/linux/generic/patches-3.8/305-mips_module_reloc.patch new file mode 100644 index 0000000000..3c51d14cf7 --- /dev/null +++ b/target/linux/generic/patches-3.8/305-mips_module_reloc.patch @@ -0,0 +1,350 @@ +--- a/arch/mips/Makefile ++++ b/arch/mips/Makefile +@@ -90,8 +90,13 @@ all-$(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 ++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 + + cflags-y += -ffreestanding + +--- 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 +@@ -42,14 +42,219 @@ 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, -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); + #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; ++ ++ 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; ++} + + int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v) + { +@@ -63,8 +268,39 @@ 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); +@@ -72,14 +308,17 @@ 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); ++ *location = (*location & ~0x03ffffff) | ((ofs + (v >> 2)) & 0x03ffffff); + + return 0; + } +@@ -286,11 +525,32 @@ 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);