From: Thomas Gleixner Date: Thu, 11 Oct 2007 09:14:21 +0000 (+0200) Subject: x86_64: prepare shared kernel/module.c X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0856268597a2ce7efc30390695d655d3dee05ca8;p=deliverable%2Flinux.git x86_64: prepare shared kernel/module.c Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile index 5ddd94b34b2c..8c48cd7b399c 100644 --- a/arch/x86_64/kernel/Makefile +++ b/arch/x86_64/kernel/Makefile @@ -38,7 +38,7 @@ obj-$(CONFIG_X86_VSMP) += vsmp.o obj-$(CONFIG_K8_NB) += k8.o obj-$(CONFIG_AUDIT) += audit.o -obj-$(CONFIG_MODULES) += module.o +obj-$(CONFIG_MODULES) += module_64.o obj-$(CONFIG_PCI) += early-quirks.o obj-y += topology.o diff --git a/arch/x86_64/kernel/module.c b/arch/x86_64/kernel/module.c deleted file mode 100644 index a888e67f5874..000000000000 --- a/arch/x86_64/kernel/module.c +++ /dev/null @@ -1,185 +0,0 @@ -/* Kernel module help for x86-64 - Copyright (C) 2001 Rusty Russell. - Copyright (C) 2002,2003 Andi Kleen, SuSE Labs. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -*/ -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#define DEBUGP(fmt...) - -#ifndef CONFIG_UML -void module_free(struct module *mod, void *module_region) -{ - vfree(module_region); - /* FIXME: If module_region == mod->init_region, trim exception - table entries. */ -} - -void *module_alloc(unsigned long size) -{ - struct vm_struct *area; - - if (!size) - return NULL; - size = PAGE_ALIGN(size); - if (size > MODULES_LEN) - return NULL; - - area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END); - if (!area) - return NULL; - - return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC); -} -#endif - -/* We don't need anything special. */ -int module_frob_arch_sections(Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - char *secstrings, - struct module *mod) -{ - return 0; -} - -int apply_relocate_add(Elf64_Shdr *sechdrs, - const char *strtab, - unsigned int symindex, - unsigned int relsec, - struct module *me) -{ - unsigned int i; - Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr; - Elf64_Sym *sym; - void *loc; - u64 val; - - DEBUGP("Applying relocate section %u to %u\n", relsec, - sechdrs[relsec].sh_info); - for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { - /* This is where to make the change */ - loc = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr - + rel[i].r_offset; - - /* This is the symbol it is referring to. Note that all - undefined symbols have been resolved. */ - sym = (Elf64_Sym *)sechdrs[symindex].sh_addr - + ELF64_R_SYM(rel[i].r_info); - - DEBUGP("type %d st_value %Lx r_addend %Lx loc %Lx\n", - (int)ELF64_R_TYPE(rel[i].r_info), - sym->st_value, rel[i].r_addend, (u64)loc); - - val = sym->st_value + rel[i].r_addend; - - switch (ELF64_R_TYPE(rel[i].r_info)) { - case R_X86_64_NONE: - break; - case R_X86_64_64: - *(u64 *)loc = val; - break; - case R_X86_64_32: - *(u32 *)loc = val; - if (val != *(u32 *)loc) - goto overflow; - break; - case R_X86_64_32S: - *(s32 *)loc = val; - if ((s64)val != *(s32 *)loc) - goto overflow; - break; - case R_X86_64_PC32: - val -= (u64)loc; - *(u32 *)loc = val; -#if 0 - if ((s64)val != *(s32 *)loc) - goto overflow; -#endif - break; - default: - printk(KERN_ERR "module %s: Unknown rela relocation: %Lu\n", - me->name, ELF64_R_TYPE(rel[i].r_info)); - return -ENOEXEC; - } - } - return 0; - -overflow: - printk(KERN_ERR "overflow in relocation type %d val %Lx\n", - (int)ELF64_R_TYPE(rel[i].r_info), val); - printk(KERN_ERR "`%s' likely not compiled with -mcmodel=kernel\n", - me->name); - return -ENOEXEC; -} - -int apply_relocate(Elf_Shdr *sechdrs, - const char *strtab, - unsigned int symindex, - unsigned int relsec, - struct module *me) -{ - printk("non add relocation not supported\n"); - return -ENOSYS; -} - -int module_finalize(const Elf_Ehdr *hdr, - const Elf_Shdr *sechdrs, - struct module *me) -{ - const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL; - char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; - - for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { - if (!strcmp(".text", secstrings + s->sh_name)) - text = s; - if (!strcmp(".altinstructions", secstrings + s->sh_name)) - alt = s; - if (!strcmp(".smp_locks", secstrings + s->sh_name)) - locks= s; - } - - if (alt) { - /* patch .altinstructions */ - void *aseg = (void *)alt->sh_addr; - apply_alternatives(aseg, aseg + alt->sh_size); - } - if (locks && text) { - void *lseg = (void *)locks->sh_addr; - void *tseg = (void *)text->sh_addr; - alternatives_smp_module_add(me, me->name, - lseg, lseg + locks->sh_size, - tseg, tseg + text->sh_size); - } - - return module_bug_finalize(hdr, sechdrs, me); -} - -void module_arch_cleanup(struct module *mod) -{ - alternatives_smp_module_del(mod); - module_bug_cleanup(mod); -} diff --git a/arch/x86_64/kernel/module_64.c b/arch/x86_64/kernel/module_64.c new file mode 100644 index 000000000000..a888e67f5874 --- /dev/null +++ b/arch/x86_64/kernel/module_64.c @@ -0,0 +1,185 @@ +/* Kernel module help for x86-64 + Copyright (C) 2001 Rusty Russell. + Copyright (C) 2002,2003 Andi Kleen, SuSE Labs. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define DEBUGP(fmt...) + +#ifndef CONFIG_UML +void module_free(struct module *mod, void *module_region) +{ + vfree(module_region); + /* FIXME: If module_region == mod->init_region, trim exception + table entries. */ +} + +void *module_alloc(unsigned long size) +{ + struct vm_struct *area; + + if (!size) + return NULL; + size = PAGE_ALIGN(size); + if (size > MODULES_LEN) + return NULL; + + area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END); + if (!area) + return NULL; + + return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC); +} +#endif + +/* We don't need anything special. */ +int module_frob_arch_sections(Elf_Ehdr *hdr, + Elf_Shdr *sechdrs, + char *secstrings, + struct module *mod) +{ + return 0; +} + +int apply_relocate_add(Elf64_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr; + Elf64_Sym *sym; + void *loc; + u64 val; + + DEBUGP("Applying relocate section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { + /* This is where to make the change */ + loc = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf64_Sym *)sechdrs[symindex].sh_addr + + ELF64_R_SYM(rel[i].r_info); + + DEBUGP("type %d st_value %Lx r_addend %Lx loc %Lx\n", + (int)ELF64_R_TYPE(rel[i].r_info), + sym->st_value, rel[i].r_addend, (u64)loc); + + val = sym->st_value + rel[i].r_addend; + + switch (ELF64_R_TYPE(rel[i].r_info)) { + case R_X86_64_NONE: + break; + case R_X86_64_64: + *(u64 *)loc = val; + break; + case R_X86_64_32: + *(u32 *)loc = val; + if (val != *(u32 *)loc) + goto overflow; + break; + case R_X86_64_32S: + *(s32 *)loc = val; + if ((s64)val != *(s32 *)loc) + goto overflow; + break; + case R_X86_64_PC32: + val -= (u64)loc; + *(u32 *)loc = val; +#if 0 + if ((s64)val != *(s32 *)loc) + goto overflow; +#endif + break; + default: + printk(KERN_ERR "module %s: Unknown rela relocation: %Lu\n", + me->name, ELF64_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + return 0; + +overflow: + printk(KERN_ERR "overflow in relocation type %d val %Lx\n", + (int)ELF64_R_TYPE(rel[i].r_info), val); + printk(KERN_ERR "`%s' likely not compiled with -mcmodel=kernel\n", + me->name); + return -ENOEXEC; +} + +int apply_relocate(Elf_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + printk("non add relocation not supported\n"); + return -ENOSYS; +} + +int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, + struct module *me) +{ + const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL; + char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + + for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { + if (!strcmp(".text", secstrings + s->sh_name)) + text = s; + if (!strcmp(".altinstructions", secstrings + s->sh_name)) + alt = s; + if (!strcmp(".smp_locks", secstrings + s->sh_name)) + locks= s; + } + + if (alt) { + /* patch .altinstructions */ + void *aseg = (void *)alt->sh_addr; + apply_alternatives(aseg, aseg + alt->sh_size); + } + if (locks && text) { + void *lseg = (void *)locks->sh_addr; + void *tseg = (void *)text->sh_addr; + alternatives_smp_module_add(me, me->name, + lseg, lseg + locks->sh_size, + tseg, tseg + text->sh_size); + } + + return module_bug_finalize(hdr, sechdrs, me); +} + +void module_arch_cleanup(struct module *mod) +{ + alternatives_smp_module_del(mod); + module_bug_cleanup(mod); +}