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fs/binfmt_elf_fdpic.c
48.7 KB
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/* binfmt_elf_fdpic.c: FDPIC ELF binary format * |
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* Copyright (C) 2003, 2004, 2006 Red Hat, Inc. All Rights Reserved. |
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* Written by David Howells (dhowells@redhat.com) * Derived from binfmt_elf.c * * 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. */ #include <linux/module.h> #include <linux/fs.h> #include <linux/stat.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/mman.h> #include <linux/errno.h> #include <linux/signal.h> #include <linux/binfmts.h> #include <linux/string.h> #include <linux/file.h> #include <linux/fcntl.h> #include <linux/slab.h> |
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#include <linux/pagemap.h> |
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#include <linux/security.h> |
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#include <linux/highmem.h> |
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#include <linux/highuid.h> |
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#include <linux/personality.h> #include <linux/ptrace.h> #include <linux/init.h> |
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#include <linux/elf.h> #include <linux/elf-fdpic.h> #include <linux/elfcore.h> |
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#include <linux/coredump.h> |
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#include <asm/uaccess.h> #include <asm/param.h> #include <asm/pgalloc.h> typedef char *elf_caddr_t; |
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#if 0 #define kdebug(fmt, ...) printk("FDPIC "fmt" " ,##__VA_ARGS__ ) #else #define kdebug(fmt, ...) do {} while(0) #endif |
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#if 0 #define kdcore(fmt, ...) printk("FDPIC "fmt" " ,##__VA_ARGS__ ) #else #define kdcore(fmt, ...) do {} while(0) #endif |
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MODULE_LICENSE("GPL"); |
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static int load_elf_fdpic_binary(struct linux_binprm *, struct pt_regs *); static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *, struct file *); static int elf_fdpic_map_file(struct elf_fdpic_params *, struct file *, struct mm_struct *, const char *); |
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|
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static int create_elf_fdpic_tables(struct linux_binprm *, struct mm_struct *, struct elf_fdpic_params *, struct elf_fdpic_params *); |
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#ifndef CONFIG_MMU |
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static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *, unsigned long *); static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *, struct file *, struct mm_struct *); |
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#endif |
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static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *, struct file *, struct mm_struct *); |
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|
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#ifdef CONFIG_ELF_CORE |
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static int elf_fdpic_core_dump(struct coredump_params *cprm); |
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#endif |
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static struct linux_binfmt elf_fdpic_format = { .module = THIS_MODULE, .load_binary = load_elf_fdpic_binary, |
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#ifdef CONFIG_ELF_CORE |
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.core_dump = elf_fdpic_core_dump, #endif |
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.min_coredump = ELF_EXEC_PAGESIZE, }; |
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static int __init init_elf_fdpic_binfmt(void) { return register_binfmt(&elf_fdpic_format); } |
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static void __exit exit_elf_fdpic_binfmt(void) { unregister_binfmt(&elf_fdpic_format); } |
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core_initcall(init_elf_fdpic_binfmt); |
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module_exit(exit_elf_fdpic_binfmt); |
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static int is_elf_fdpic(struct elfhdr *hdr, struct file *file) { if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0) return 0; if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN) return 0; if (!elf_check_arch(hdr) || !elf_check_fdpic(hdr)) return 0; if (!file->f_op || !file->f_op->mmap) return 0; return 1; } /*****************************************************************************/ /* * read the program headers table into memory */ |
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static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *file) |
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{ struct elf32_phdr *phdr; unsigned long size; int retval, loop; if (params->hdr.e_phentsize != sizeof(struct elf_phdr)) return -ENOMEM; if (params->hdr.e_phnum > 65536U / sizeof(struct elf_phdr)) return -ENOMEM; size = params->hdr.e_phnum * sizeof(struct elf_phdr); params->phdrs = kmalloc(size, GFP_KERNEL); if (!params->phdrs) return -ENOMEM; |
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retval = kernel_read(file, params->hdr.e_phoff, (char *) params->phdrs, size); |
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if (unlikely(retval != size)) return retval < 0 ? retval : -ENOEXEC; |
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/* determine stack size for this binary */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (phdr->p_type != PT_GNU_STACK) continue; if (phdr->p_flags & PF_X) params->flags |= ELF_FDPIC_FLAG_EXEC_STACK; else params->flags |= ELF_FDPIC_FLAG_NOEXEC_STACK; params->stack_size = phdr->p_memsz; break; } return 0; |
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} |
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/*****************************************************************************/ /* * load an fdpic binary into various bits of memory */ |
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static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs) |
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{ struct elf_fdpic_params exec_params, interp_params; struct elf_phdr *phdr; |
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unsigned long stack_size, entryaddr; |
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#ifdef ELF_FDPIC_PLAT_INIT unsigned long dynaddr; #endif |
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#ifndef CONFIG_MMU unsigned long stack_prot; #endif |
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struct file *interpreter = NULL; /* to shut gcc up */ char *interpreter_name = NULL; int executable_stack; int retval, i; |
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kdebug("____ LOAD %d ____", current->pid); |
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memset(&exec_params, 0, sizeof(exec_params)); memset(&interp_params, 0, sizeof(interp_params)); exec_params.hdr = *(struct elfhdr *) bprm->buf; exec_params.flags = ELF_FDPIC_FLAG_PRESENT | ELF_FDPIC_FLAG_EXECUTABLE; /* check that this is a binary we know how to deal with */ retval = -ENOEXEC; if (!is_elf_fdpic(&exec_params.hdr, bprm->file)) goto error; /* read the program header table */ retval = elf_fdpic_fetch_phdrs(&exec_params, bprm->file); if (retval < 0) goto error; /* scan for a program header that specifies an interpreter */ phdr = exec_params.phdrs; for (i = 0; i < exec_params.hdr.e_phnum; i++, phdr++) { switch (phdr->p_type) { case PT_INTERP: retval = -ENOMEM; if (phdr->p_filesz > PATH_MAX) goto error; retval = -ENOENT; if (phdr->p_filesz < 2) goto error; /* read the name of the interpreter into memory */ |
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interpreter_name = kmalloc(phdr->p_filesz, GFP_KERNEL); |
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if (!interpreter_name) goto error; retval = kernel_read(bprm->file, phdr->p_offset, interpreter_name, phdr->p_filesz); |
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if (unlikely(retval != phdr->p_filesz)) { if (retval >= 0) retval = -ENOEXEC; |
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goto error; |
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} |
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retval = -ENOENT; if (interpreter_name[phdr->p_filesz - 1] != '\0') goto error; kdebug("Using ELF interpreter %s", interpreter_name); /* replace the program with the interpreter */ interpreter = open_exec(interpreter_name); retval = PTR_ERR(interpreter); if (IS_ERR(interpreter)) { interpreter = NULL; goto error; } |
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/* * If the binary is not readable then enforce * mm->dumpable = 0 regardless of the interpreter's * permissions. */ if (file_permission(interpreter, MAY_READ) < 0) bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP; |
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retval = kernel_read(interpreter, 0, bprm->buf, BINPRM_BUF_SIZE); |
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if (unlikely(retval != BINPRM_BUF_SIZE)) { if (retval >= 0) retval = -ENOEXEC; |
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goto error; |
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} |
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interp_params.hdr = *((struct elfhdr *) bprm->buf); break; case PT_LOAD: #ifdef CONFIG_MMU if (exec_params.load_addr == 0) exec_params.load_addr = phdr->p_vaddr; #endif break; } } if (elf_check_const_displacement(&exec_params.hdr)) exec_params.flags |= ELF_FDPIC_FLAG_CONSTDISP; /* perform insanity checks on the interpreter */ if (interpreter_name) { retval = -ELIBBAD; if (!is_elf_fdpic(&interp_params.hdr, interpreter)) goto error; interp_params.flags = ELF_FDPIC_FLAG_PRESENT; /* read the interpreter's program header table */ retval = elf_fdpic_fetch_phdrs(&interp_params, interpreter); if (retval < 0) goto error; } stack_size = exec_params.stack_size; |
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if (exec_params.flags & ELF_FDPIC_FLAG_EXEC_STACK) executable_stack = EXSTACK_ENABLE_X; else if (exec_params.flags & ELF_FDPIC_FLAG_NOEXEC_STACK) executable_stack = EXSTACK_DISABLE_X; |
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else executable_stack = EXSTACK_DEFAULT; |
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if (stack_size == 0) { stack_size = interp_params.stack_size; if (interp_params.flags & ELF_FDPIC_FLAG_EXEC_STACK) executable_stack = EXSTACK_ENABLE_X; else if (interp_params.flags & ELF_FDPIC_FLAG_NOEXEC_STACK) executable_stack = EXSTACK_DISABLE_X; else executable_stack = EXSTACK_DEFAULT; } |
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retval = -ENOEXEC; if (stack_size == 0) goto error; if (elf_check_const_displacement(&interp_params.hdr)) interp_params.flags |= ELF_FDPIC_FLAG_CONSTDISP; /* flush all traces of the currently running executable */ retval = flush_old_exec(bprm); if (retval) goto error; /* there's now no turning back... the old userspace image is dead, * defunct, deceased, etc. after this point we have to exit via * error_kill */ set_personality(PER_LINUX_FDPIC); |
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if (elf_read_implies_exec(&exec_params.hdr, executable_stack)) current->personality |= READ_IMPLIES_EXEC; |
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setup_new_exec(bprm); |
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set_binfmt(&elf_fdpic_format); current->mm->start_code = 0; current->mm->end_code = 0; current->mm->start_stack = 0; current->mm->start_data = 0; current->mm->end_data = 0; current->mm->context.exec_fdpic_loadmap = 0; current->mm->context.interp_fdpic_loadmap = 0; current->flags &= ~PF_FORKNOEXEC; #ifdef CONFIG_MMU elf_fdpic_arch_lay_out_mm(&exec_params, &interp_params, ¤t->mm->start_stack, ¤t->mm->start_brk); |
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|
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retval = setup_arg_pages(bprm, current->mm->start_stack, executable_stack); |
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if (retval < 0) { send_sig(SIGKILL, current, 0); goto error_kill; } #endif /* load the executable and interpreter into memory */ |
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retval = elf_fdpic_map_file(&exec_params, bprm->file, current->mm, "executable"); |
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if (retval < 0) goto error_kill; if (interpreter_name) { retval = elf_fdpic_map_file(&interp_params, interpreter, current->mm, "interpreter"); if (retval < 0) { printk(KERN_ERR "Unable to load interpreter "); goto error_kill; } allow_write_access(interpreter); fput(interpreter); interpreter = NULL; } #ifdef CONFIG_MMU if (!current->mm->start_brk) current->mm->start_brk = current->mm->end_data; |
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current->mm->brk = current->mm->start_brk = PAGE_ALIGN(current->mm->start_brk); |
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#else /* create a stack and brk area big enough for everyone * - the brk heap starts at the bottom and works up * - the stack starts at the top and works down */ stack_size = (stack_size + PAGE_SIZE - 1) & PAGE_MASK; if (stack_size < PAGE_SIZE * 2) stack_size = PAGE_SIZE * 2; |
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stack_prot = PROT_READ | PROT_WRITE; if (executable_stack == EXSTACK_ENABLE_X || (executable_stack == EXSTACK_DEFAULT && VM_STACK_FLAGS & VM_EXEC)) stack_prot |= PROT_EXEC; |
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down_write(¤t->mm->mmap_sem); |
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current->mm->start_brk = do_mmap(NULL, 0, stack_size, stack_prot, |
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_UNINITIALIZED | MAP_GROWSDOWN, |
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0); |
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if (IS_ERR_VALUE(current->mm->start_brk)) { |
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up_write(¤t->mm->mmap_sem); retval = current->mm->start_brk; current->mm->start_brk = 0; goto error_kill; } |
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up_write(¤t->mm->mmap_sem); current->mm->brk = current->mm->start_brk; current->mm->context.end_brk = current->mm->start_brk; |
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current->mm->context.end_brk += (stack_size > PAGE_SIZE) ? (stack_size - PAGE_SIZE) : 0; |
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current->mm->start_stack = current->mm->start_brk + stack_size; #endif |
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install_exec_creds(bprm); |
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current->flags &= ~PF_FORKNOEXEC; |
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if (create_elf_fdpic_tables(bprm, current->mm, &exec_params, &interp_params) < 0) |
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goto error_kill; |
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kdebug("- start_code %lx", current->mm->start_code); kdebug("- end_code %lx", current->mm->end_code); kdebug("- start_data %lx", current->mm->start_data); kdebug("- end_data %lx", current->mm->end_data); kdebug("- start_brk %lx", current->mm->start_brk); kdebug("- brk %lx", current->mm->brk); kdebug("- start_stack %lx", current->mm->start_stack); |
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#ifdef ELF_FDPIC_PLAT_INIT /* * The ABI may specify that certain registers be set up in special * ways (on i386 %edx is the address of a DT_FINI function, for * example. This macro performs whatever initialization to * the regs structure is required. */ |
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dynaddr = interp_params.dynamic_addr ?: exec_params.dynamic_addr; ELF_FDPIC_PLAT_INIT(regs, exec_params.map_addr, interp_params.map_addr, dynaddr); |
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#endif /* everything is now ready... get the userspace context ready to roll */ |
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entryaddr = interp_params.entry_addr ?: exec_params.entry_addr; start_thread(regs, entryaddr, current->mm->start_stack); |
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|
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retval = 0; error: if (interpreter) { allow_write_access(interpreter); fput(interpreter); } |
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kfree(interpreter_name); kfree(exec_params.phdrs); kfree(exec_params.loadmap); kfree(interp_params.phdrs); kfree(interp_params.loadmap); |
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return retval; /* unrecoverable error - kill the process */ |
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error_kill: |
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send_sig(SIGSEGV, current, 0); goto error; |
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} |
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/*****************************************************************************/ |
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#ifndef ELF_BASE_PLATFORM /* * AT_BASE_PLATFORM indicates the "real" hardware/microarchitecture. * If the arch defines ELF_BASE_PLATFORM (in asm/elf.h), the value * will be copied to the user stack in the same manner as AT_PLATFORM. */ #define ELF_BASE_PLATFORM NULL #endif |
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/* |
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* present useful information to the program by shovelling it onto the new * process's stack |
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*/ static int create_elf_fdpic_tables(struct linux_binprm *bprm, struct mm_struct *mm, struct elf_fdpic_params *exec_params, struct elf_fdpic_params *interp_params) { |
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const struct cred *cred = current_cred(); |
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unsigned long sp, csp, nitems; |
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elf_caddr_t __user *argv, *envp; |
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size_t platform_len = 0, len; |
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char *k_platform, *k_base_platform; char __user *u_platform, *u_base_platform, *p; |
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long hwcap; int loop; |
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int nr; /* reset for each csp adjustment */ |
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|
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#ifdef CONFIG_MMU |
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/* In some cases (e.g. Hyper-Threading), we want to avoid L1 evictions * by the processes running on the same package. One thing we can do is * to shuffle the initial stack for them, so we give the architecture * an opportunity to do so here. */ sp = arch_align_stack(bprm->p); |
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#else sp = mm->start_stack; /* stack the program arguments and environment */ if (elf_fdpic_transfer_args_to_stack(bprm, &sp) < 0) return -EFAULT; #endif |
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hwcap = ELF_HWCAP; |
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/* * If this architecture has a platform capability string, copy it * to userspace. In some cases (Sparc), this info is impossible * for userspace to get any other way, in others (i386) it is * merely difficult. */ |
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k_platform = ELF_PLATFORM; |
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u_platform = NULL; |
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if (k_platform) { platform_len = strlen(k_platform) + 1; sp -= platform_len; |
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u_platform = (char __user *) sp; |
1da177e4c Linux-2.6.12-rc2 |
505 506 507 |
if (__copy_to_user(u_platform, k_platform, platform_len) != 0) return -EFAULT; } |
ec23847d6 binfmt_elf_fdpic:... |
508 509 510 511 512 513 514 515 516 517 518 519 520 521 |
/* * If this architecture has a "base" platform capability * string, copy it to userspace. */ k_base_platform = ELF_BASE_PLATFORM; u_base_platform = NULL; if (k_base_platform) { platform_len = strlen(k_base_platform) + 1; sp -= platform_len; u_base_platform = (char __user *) sp; if (__copy_to_user(u_base_platform, k_base_platform, platform_len) != 0) return -EFAULT; } |
1da177e4c Linux-2.6.12-rc2 |
522 523 524 525 526 527 528 |
sp &= ~7UL; /* stack the load map(s) */ len = sizeof(struct elf32_fdpic_loadmap); len += sizeof(struct elf32_fdpic_loadseg) * exec_params->loadmap->nsegs; sp = (sp - len) & ~7UL; exec_params->map_addr = sp; |
530018bf3 [PATCH] frv: binf... |
529 |
if (copy_to_user((void __user *) sp, exec_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
530 531 532 533 534 535 |
return -EFAULT; current->mm->context.exec_fdpic_loadmap = (unsigned long) sp; if (interp_params->loadmap) { len = sizeof(struct elf32_fdpic_loadmap); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
536 537 |
len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs; |
1da177e4c Linux-2.6.12-rc2 |
538 539 |
sp = (sp - len) & ~7UL; interp_params->map_addr = sp; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
540 541 |
if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
542 543 544 545 546 547 |
return -EFAULT; current->mm->context.interp_fdpic_loadmap = (unsigned long) sp; } /* force 16 byte _final_ alignment here for generality */ |
5edc2a512 binfmt_elf_fdpic:... |
548 |
#define DLINFO_ITEMS 15 |
1da177e4c Linux-2.6.12-rc2 |
549 |
|
ec23847d6 binfmt_elf_fdpic:... |
550 551 |
nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) + (k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH; |
1da177e4c Linux-2.6.12-rc2 |
552 |
|
5edc2a512 binfmt_elf_fdpic:... |
553 554 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) nitems++; |
1da177e4c Linux-2.6.12-rc2 |
555 556 557 558 559 560 561 562 563 564 |
csp = sp; sp -= nitems * 2 * sizeof(unsigned long); sp -= (bprm->envc + 1) * sizeof(char *); /* envv[] */ sp -= (bprm->argc + 1) * sizeof(char *); /* argv[] */ sp -= 1 * sizeof(unsigned long); /* argc */ csp -= sp & 15UL; sp -= sp & 15UL; /* put the ELF interpreter info on the stack */ |
9b14ec35f binfmt_elf_fdpic:... |
565 |
#define NEW_AUX_ENT(id, val) \ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
566 567 568 569 570 571 |
do { \ struct { unsigned long _id, _val; } __user *ent; \ \ ent = (void __user *) csp; \ __put_user((id), &ent[nr]._id); \ __put_user((val), &ent[nr]._val); \ |
9b14ec35f binfmt_elf_fdpic:... |
572 |
nr++; \ |
1da177e4c Linux-2.6.12-rc2 |
573 |
} while (0) |
9b14ec35f binfmt_elf_fdpic:... |
574 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
575 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
576 |
NEW_AUX_ENT(AT_NULL, 0); |
1da177e4c Linux-2.6.12-rc2 |
577 |
if (k_platform) { |
9b14ec35f binfmt_elf_fdpic:... |
578 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
579 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
580 |
NEW_AUX_ENT(AT_PLATFORM, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
581 |
(elf_addr_t) (unsigned long) u_platform); |
1da177e4c Linux-2.6.12-rc2 |
582 |
} |
ec23847d6 binfmt_elf_fdpic:... |
583 584 585 586 587 588 |
if (k_base_platform) { nr = 0; csp -= 2 * sizeof(unsigned long); NEW_AUX_ENT(AT_BASE_PLATFORM, (elf_addr_t) (unsigned long) u_base_platform); } |
5edc2a512 binfmt_elf_fdpic:... |
589 590 591 592 593 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) { nr = 0; csp -= 2 * sizeof(unsigned long); NEW_AUX_ENT(AT_EXECFD, bprm->interp_data); } |
9b14ec35f binfmt_elf_fdpic:... |
594 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
595 |
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
596 597 598 599 600 601 602 603 604 |
NEW_AUX_ENT(AT_HWCAP, hwcap); NEW_AUX_ENT(AT_PAGESZ, PAGE_SIZE); NEW_AUX_ENT(AT_CLKTCK, CLOCKS_PER_SEC); NEW_AUX_ENT(AT_PHDR, exec_params->ph_addr); NEW_AUX_ENT(AT_PHENT, sizeof(struct elf_phdr)); NEW_AUX_ENT(AT_PHNUM, exec_params->hdr.e_phnum); NEW_AUX_ENT(AT_BASE, interp_params->elfhdr_addr); NEW_AUX_ENT(AT_FLAGS, 0); NEW_AUX_ENT(AT_ENTRY, exec_params->entry_addr); |
86a264abe CRED: Wrap curren... |
605 606 607 608 |
NEW_AUX_ENT(AT_UID, (elf_addr_t) cred->uid); NEW_AUX_ENT(AT_EUID, (elf_addr_t) cred->euid); NEW_AUX_ENT(AT_GID, (elf_addr_t) cred->gid); NEW_AUX_ENT(AT_EGID, (elf_addr_t) cred->egid); |
5edc2a512 binfmt_elf_fdpic:... |
609 610 |
NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm)); NEW_AUX_ENT(AT_EXECFN, bprm->exec); |
1da177e4c Linux-2.6.12-rc2 |
611 612 |
#ifdef ARCH_DLINFO |
9b14ec35f binfmt_elf_fdpic:... |
613 614 |
nr = 0; csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long); |
1da177e4c Linux-2.6.12-rc2 |
615 616 617 618 619 620 621 622 623 |
/* ARCH_DLINFO must come last so platform specific code can enforce * special alignment requirements on the AUXV if necessary (eg. PPC). */ ARCH_DLINFO; #endif #undef NEW_AUX_ENT /* allocate room for argv[] and envv[] */ csp -= (bprm->envc + 1) * sizeof(elf_caddr_t); |
530018bf3 [PATCH] frv: binf... |
624 |
envp = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
625 |
csp -= (bprm->argc + 1) * sizeof(elf_caddr_t); |
530018bf3 [PATCH] frv: binf... |
626 |
argv = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
627 628 629 |
/* stack argc */ csp -= sizeof(unsigned long); |
530018bf3 [PATCH] frv: binf... |
630 |
__put_user(bprm->argc, (unsigned long __user *) csp); |
1da177e4c Linux-2.6.12-rc2 |
631 |
|
88bcd5126 BUG_ON() Conversi... |
632 |
BUG_ON(csp != sp); |
1da177e4c Linux-2.6.12-rc2 |
633 634 635 636 637 |
/* fill in the argv[] array */ #ifdef CONFIG_MMU current->mm->arg_start = bprm->p; #else |
8a2ab7f5d [PATCH] FDPIC: Ad... |
638 639 |
current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p); |
1da177e4c Linux-2.6.12-rc2 |
640 |
#endif |
530018bf3 [PATCH] frv: binf... |
641 |
p = (char __user *) current->mm->arg_start; |
1da177e4c Linux-2.6.12-rc2 |
642 643 |
for (loop = bprm->argc; loop > 0; loop--) { __put_user((elf_caddr_t) p, argv++); |
b6a2fea39 mm: variable leng... |
644 645 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
646 647 648 649 650 651 652 653 654 655 |
return -EINVAL; p += len; } __put_user(NULL, argv); current->mm->arg_end = (unsigned long) p; /* fill in the envv[] array */ current->mm->env_start = (unsigned long) p; for (loop = bprm->envc; loop > 0; loop--) { __put_user((elf_caddr_t)(unsigned long) p, envp++); |
b6a2fea39 mm: variable leng... |
656 657 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
658 659 660 661 662 663 664 665 |
return -EINVAL; p += len; } __put_user(NULL, envp); current->mm->env_end = (unsigned long) p; mm->start_stack = (unsigned long) sp; return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
666 |
} |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 671 672 673 |
/*****************************************************************************/ /* * transfer the program arguments and environment from the holding pages onto * the stack */ #ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
674 675 |
static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned long *_sp) |
1da177e4c Linux-2.6.12-rc2 |
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 |
{ unsigned long index, stop, sp; char *src; int ret = 0; stop = bprm->p >> PAGE_SHIFT; sp = *_sp; for (index = MAX_ARG_PAGES - 1; index >= stop; index--) { src = kmap(bprm->page[index]); sp -= PAGE_SIZE; if (copy_to_user((void *) sp, src, PAGE_SIZE) != 0) ret = -EFAULT; kunmap(bprm->page[index]); if (ret < 0) goto out; } *_sp = (*_sp - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p)) & ~15; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
695 |
out: |
1da177e4c Linux-2.6.12-rc2 |
696 |
return ret; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
697 |
} |
1da177e4c Linux-2.6.12-rc2 |
698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 |
#endif /*****************************************************************************/ /* * load the appropriate binary image (executable or interpreter) into memory * - we assume no MMU is available * - if no other PIC bits are set in params->hdr->e_flags * - we assume that the LOADable segments in the binary are independently relocatable * - we assume R/O executable segments are shareable * - else * - we assume the loadable parts of the image to require fixed displacement * - the image is not shareable */ static int elf_fdpic_map_file(struct elf_fdpic_params *params, struct file *file, struct mm_struct *mm, const char *what) { struct elf32_fdpic_loadmap *loadmap; #ifdef CONFIG_MMU struct elf32_fdpic_loadseg *mseg; #endif struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, stop; unsigned nloads, tmp; size_t size; int loop, ret; /* allocate a load map table */ nloads = 0; for (loop = 0; loop < params->hdr.e_phnum; loop++) if (params->phdrs[loop].p_type == PT_LOAD) nloads++; if (nloads == 0) return -ELIBBAD; size = sizeof(*loadmap) + nloads * sizeof(*seg); |
b87576d59 fs: Convert kmall... |
737 |
loadmap = kzalloc(size, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
738 739 740 741 |
if (!loadmap) return -ENOMEM; params->loadmap = loadmap; |
1da177e4c Linux-2.6.12-rc2 |
742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 |
loadmap->version = ELF32_FDPIC_LOADMAP_VERSION; loadmap->nsegs = nloads; load_addr = params->load_addr; seg = loadmap->segs; /* map the requested LOADs into the memory space */ switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) { case ELF_FDPIC_FLAG_CONSTDISP: case ELF_FDPIC_FLAG_CONTIGUOUS: #ifndef CONFIG_MMU ret = elf_fdpic_map_file_constdisp_on_uclinux(params, file, mm); if (ret < 0) return ret; break; #endif default: ret = elf_fdpic_map_file_by_direct_mmap(params, file, mm); if (ret < 0) return ret; break; } /* map the entry point */ if (params->hdr.e_entry) { seg = loadmap->segs; for (loop = loadmap->nsegs; loop > 0; loop--, seg++) { if (params->hdr.e_entry >= seg->p_vaddr && |
8a2ab7f5d [PATCH] FDPIC: Ad... |
771 |
params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) { |
1da177e4c Linux-2.6.12-rc2 |
772 |
params->entry_addr = |
8a2ab7f5d [PATCH] FDPIC: Ad... |
773 774 |
(params->hdr.e_entry - seg->p_vaddr) + seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
775 776 777 778 779 780 |
break; } } } /* determine where the program header table has wound up if mapped */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
781 782 |
stop = params->hdr.e_phoff; stop += params->hdr.e_phnum * sizeof (struct elf_phdr); |
1da177e4c Linux-2.6.12-rc2 |
783 784 785 786 787 788 789 790 791 792 793 794 795 |
phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (phdr->p_type != PT_LOAD) continue; if (phdr->p_offset > params->hdr.e_phoff || phdr->p_offset + phdr->p_filesz < stop) continue; seg = loadmap->segs; for (loop = loadmap->nsegs; loop > 0; loop--, seg++) { if (phdr->p_vaddr >= seg->p_vaddr && |
8a2ab7f5d [PATCH] FDPIC: Ad... |
796 797 798 799 800 |
phdr->p_vaddr + phdr->p_filesz <= seg->p_vaddr + seg->p_memsz) { params->ph_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr + |
1da177e4c Linux-2.6.12-rc2 |
801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 |
params->hdr.e_phoff - phdr->p_offset; break; } } break; } /* determine where the dynamic section has wound up if there is one */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (phdr->p_type != PT_DYNAMIC) continue; seg = loadmap->segs; for (loop = loadmap->nsegs; loop > 0; loop--, seg++) { if (phdr->p_vaddr >= seg->p_vaddr && |
8a2ab7f5d [PATCH] FDPIC: Ad... |
817 818 819 820 821 822 823 824 825 |
phdr->p_vaddr + phdr->p_memsz <= seg->p_vaddr + seg->p_memsz) { params->dynamic_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr; /* check the dynamic section contains at least * one item, and that the last item is a NULL * entry */ |
1da177e4c Linux-2.6.12-rc2 |
826 827 828 829 830 |
if (phdr->p_memsz == 0 || phdr->p_memsz % sizeof(Elf32_Dyn) != 0) goto dynamic_error; tmp = phdr->p_memsz / sizeof(Elf32_Dyn); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
831 832 |
if (((Elf32_Dyn *) params->dynamic_addr)[tmp - 1].d_tag != 0) |
1da177e4c Linux-2.6.12-rc2 |
833 834 835 836 837 838 839 840 |
goto dynamic_error; break; } } break; } /* now elide adjacent segments in the load map on MMU linux |
8a2ab7f5d [PATCH] FDPIC: Ad... |
841 842 |
* - on uClinux the holes between may actually be filled with system * stuff or stuff from other processes |
1da177e4c Linux-2.6.12-rc2 |
843 844 845 846 847 848 849 850 851 852 |
*/ #ifdef CONFIG_MMU nloads = loadmap->nsegs; mseg = loadmap->segs; seg = mseg + 1; for (loop = 1; loop < nloads; loop++) { /* see if we have a candidate for merging */ if (seg->p_vaddr - mseg->p_vaddr == seg->addr - mseg->addr) { load_addr = PAGE_ALIGN(mseg->addr + mseg->p_memsz); if (load_addr == (seg->addr & PAGE_MASK)) { |
8a2ab7f5d [PATCH] FDPIC: Ad... |
853 854 855 |
mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz); |
1da177e4c Linux-2.6.12-rc2 |
856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 |
mseg->p_memsz += seg->addr & ~PAGE_MASK; mseg->p_memsz += seg->p_memsz; loadmap->nsegs--; continue; } } mseg++; if (mseg != seg) *mseg = *seg; } #endif kdebug("Mapped Object [%s]:", what); kdebug("- elfhdr : %lx", params->elfhdr_addr); kdebug("- entry : %lx", params->entry_addr); kdebug("- PHDR[] : %lx", params->ph_addr); kdebug("- DYNAMIC[]: %lx", params->dynamic_addr); seg = loadmap->segs; for (loop = 0; loop < loadmap->nsegs; loop++, seg++) kdebug("- LOAD[%d] : %08x-%08x [va=%x ms=%x]", loop, seg->addr, seg->addr + seg->p_memsz - 1, seg->p_vaddr, seg->p_memsz); return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
882 |
dynamic_error: |
1da177e4c Linux-2.6.12-rc2 |
883 884 |
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu) ", |
0f7fc9e4d [PATCH] VFS: chan... |
885 |
what, file->f_path.dentry->d_inode->i_ino); |
1da177e4c Linux-2.6.12-rc2 |
886 |
return -ELIBBAD; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
887 |
} |
1da177e4c Linux-2.6.12-rc2 |
888 889 890 891 892 893 |
/*****************************************************************************/ /* * map a file with constant displacement under uClinux */ #ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
894 895 896 897 |
static int elf_fdpic_map_file_constdisp_on_uclinux( struct elf_fdpic_params *params, struct file *file, struct mm_struct *mm) |
1da177e4c Linux-2.6.12-rc2 |
898 899 900 901 902 903 904 905 906 |
{ struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, base = ULONG_MAX, top = 0, maddr = 0, mflags; loff_t fpos; int loop, ret; load_addr = params->load_addr; seg = params->loadmap->segs; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
907 908 |
/* determine the bounds of the contiguous overall allocation we must * make */ |
1da177e4c Linux-2.6.12-rc2 |
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 |
phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (params->phdrs[loop].p_type != PT_LOAD) continue; if (base > phdr->p_vaddr) base = phdr->p_vaddr; if (top < phdr->p_vaddr + phdr->p_memsz) top = phdr->p_vaddr + phdr->p_memsz; } /* allocate one big anon block for everything */ mflags = MAP_PRIVATE; if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE) mflags |= MAP_EXECUTABLE; down_write(&mm->mmap_sem); maddr = do_mmap(NULL, load_addr, top - base, PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0); up_write(&mm->mmap_sem); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
929 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 |
return (int) maddr; if (load_addr != 0) load_addr += PAGE_ALIGN(top - base); /* and then load the file segments into it */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (params->phdrs[loop].p_type != PT_LOAD) continue; fpos = phdr->p_offset; seg->addr = maddr + (phdr->p_vaddr - base); seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
946 947 |
ret = file->f_op->read(file, (void *) seg->addr, phdr->p_filesz, &fpos); |
1da177e4c Linux-2.6.12-rc2 |
948 949 950 951 952 953 954 955 |
if (ret < 0) return ret; /* map the ELF header address if in this segment */ if (phdr->p_offset == 0) params->elfhdr_addr = seg->addr; /* clear any space allocated but not loaded */ |
ab4ad5551 bin_elf_fdpic: ch... |
956 |
if (phdr->p_filesz < phdr->p_memsz) { |
e30c7c3b3 binfmt_elf_fdpic:... |
957 958 959 |
if (clear_user((void *) (seg->addr + phdr->p_filesz), phdr->p_memsz - phdr->p_filesz)) return -EFAULT; |
ab4ad5551 bin_elf_fdpic: ch... |
960 |
} |
1da177e4c Linux-2.6.12-rc2 |
961 962 963 |
if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
964 965 966 967 968 |
if (!mm->start_code) { mm->start_code = seg->addr; mm->end_code = seg->addr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
969 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
970 |
mm->start_data = seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
971 |
mm->end_data = seg->addr + phdr->p_memsz; |
1da177e4c Linux-2.6.12-rc2 |
972 |
} |
1da177e4c Linux-2.6.12-rc2 |
973 974 975 976 977 978 |
} seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
979 |
} |
1da177e4c Linux-2.6.12-rc2 |
980 981 982 983 984 985 986 987 988 989 990 991 992 |
#endif /*****************************************************************************/ /* * map a binary by direct mmap() of the individual PT_LOAD segments */ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params, struct file *file, struct mm_struct *mm) { struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, delta_vaddr; |
e30c7c3b3 binfmt_elf_fdpic:... |
993 |
int loop, dvset; |
1da177e4c Linux-2.6.12-rc2 |
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 |
load_addr = params->load_addr; delta_vaddr = 0; dvset = 0; seg = params->loadmap->segs; /* deal with each load segment separately */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { unsigned long maddr, disp, excess, excess1; int prot = 0, flags; if (phdr->p_type != PT_LOAD) continue; kdebug("[LOAD] va=%lx of=%lx fs=%lx ms=%lx", (unsigned long) phdr->p_vaddr, (unsigned long) phdr->p_offset, (unsigned long) phdr->p_filesz, (unsigned long) phdr->p_memsz); /* determine the mapping parameters */ if (phdr->p_flags & PF_R) prot |= PROT_READ; if (phdr->p_flags & PF_W) prot |= PROT_WRITE; if (phdr->p_flags & PF_X) prot |= PROT_EXEC; flags = MAP_PRIVATE | MAP_DENYWRITE; if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE) flags |= MAP_EXECUTABLE; maddr = 0; switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) { case ELF_FDPIC_FLAG_INDEPENDENT: /* PT_LOADs are independently locatable */ break; case ELF_FDPIC_FLAG_HONOURVADDR: /* the specified virtual address must be honoured */ maddr = phdr->p_vaddr; flags |= MAP_FIXED; break; case ELF_FDPIC_FLAG_CONSTDISP: /* constant displacement |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1040 1041 |
* - can be mapped anywhere, but must be mapped as a * unit |
1da177e4c Linux-2.6.12-rc2 |
1042 1043 1044 1045 1046 |
*/ if (!dvset) { maddr = load_addr; delta_vaddr = phdr->p_vaddr; dvset = 1; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1047 |
} else { |
1da177e4c Linux-2.6.12-rc2 |
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 |
maddr = load_addr + phdr->p_vaddr - delta_vaddr; flags |= MAP_FIXED; } break; case ELF_FDPIC_FLAG_CONTIGUOUS: /* contiguity handled later */ break; default: BUG(); } maddr &= PAGE_MASK; /* create the mapping */ disp = phdr->p_vaddr & ~PAGE_MASK; down_write(&mm->mmap_sem); maddr = do_mmap(file, maddr, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp); up_write(&mm->mmap_sem); kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1071 1072 |
loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp, maddr); |
1da177e4c Linux-2.6.12-rc2 |
1073 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
1074 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
1075 |
return (int) maddr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1076 1077 |
if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS) |
1da177e4c Linux-2.6.12-rc2 |
1078 1079 1080 1081 1082 1083 1084 1085 1086 |
load_addr += PAGE_ALIGN(phdr->p_memsz + disp); seg->addr = maddr + disp; seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; /* map the ELF header address if in this segment */ if (phdr->p_offset == 0) params->elfhdr_addr = seg->addr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1087 1088 |
/* clear the bit between beginning of mapping and beginning of * PT_LOAD */ |
1da177e4c Linux-2.6.12-rc2 |
1089 1090 |
if (prot & PROT_WRITE && disp > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp); |
e30c7c3b3 binfmt_elf_fdpic:... |
1091 1092 |
if (clear_user((void __user *) maddr, disp)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 |
maddr += disp; } /* clear any space allocated but not loaded * - on uClinux we can just clear the lot * - on MMU linux we'll get a SIGBUS beyond the last page * extant in the file */ excess = phdr->p_memsz - phdr->p_filesz; excess1 = PAGE_SIZE - ((maddr + phdr->p_filesz) & ~PAGE_MASK); #ifdef CONFIG_MMU |
1da177e4c Linux-2.6.12-rc2 |
1105 1106 1107 1108 1109 1110 |
if (excess > excess1) { unsigned long xaddr = maddr + phdr->p_filesz + excess1; unsigned long xmaddr; flags |= MAP_FIXED | MAP_ANONYMOUS; down_write(&mm->mmap_sem); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1111 1112 |
xmaddr = do_mmap(NULL, xaddr, excess - excess1, prot, flags, 0); |
1da177e4c Linux-2.6.12-rc2 |
1113 1114 1115 1116 |
up_write(&mm->mmap_sem); kdebug("mmap[%d] <anon>" " ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1117 1118 |
loop, xaddr, excess - excess1, prot, flags, xmaddr); |
1da177e4c Linux-2.6.12-rc2 |
1119 1120 1121 1122 1123 1124 1125 1126 |
if (xmaddr != xaddr) return -ENOMEM; } if (prot & PROT_WRITE && excess1 > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess1); |
e30c7c3b3 binfmt_elf_fdpic:... |
1127 1128 1129 |
if (clear_user((void __user *) maddr + phdr->p_filesz, excess1)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1130 1131 1132 1133 1134 1135 |
} #else if (excess > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess); |
e30c7c3b3 binfmt_elf_fdpic:... |
1136 1137 |
if (clear_user((void *) maddr + phdr->p_filesz, excess)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1138 1139 1140 1141 1142 |
} #endif if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
1143 1144 1145 1146 |
if (!mm->start_code) { mm->start_code = maddr; mm->end_code = maddr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1147 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
1148 1149 1150 1151 1152 1153 1154 1155 1156 |
mm->start_data = maddr; mm->end_data = maddr + phdr->p_memsz; } } seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1157 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 |
/*****************************************************************************/ /* * ELF-FDPIC core dumper * * Modelled on fs/exec.c:aout_core_dump() * Jeremy Fitzhardinge <jeremy@sw.oz.au> * * Modelled on fs/binfmt_elf.c core dumper */ |
698ba7b5a elf: kill USE_ELF... |
1168 |
#ifdef CONFIG_ELF_CORE |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1169 1170 |
/* |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1171 1172 1173 1174 1175 1176 |
* Decide whether a segment is worth dumping; default is yes to be * sure (missing info is worse than too much; etc). * Personally I'd include everything, and use the coredump limit... * * I think we should skip something. But I am not sure how. H.J. */ |
ee78b0a61 coredump masking:... |
1177 |
static int maydump(struct vm_area_struct *vma, unsigned long mm_flags) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1178 |
{ |
ee78b0a61 coredump masking:... |
1179 |
int dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 |
/* Do not dump I/O mapped devices or special mappings */ if (vma->vm_flags & (VM_IO | VM_RESERVED)) { kdcore("%08lx: %08lx: no (IO)", vma->vm_start, vma->vm_flags); return 0; } /* If we may not read the contents, don't allow us to dump * them either. "dump_write()" can't handle it anyway. */ if (!(vma->vm_flags & VM_READ)) { kdcore("%08lx: %08lx: no (!read)", vma->vm_start, vma->vm_flags); return 0; } |
ee78b0a61 coredump masking:... |
1193 |
/* By default, dump shared memory if mapped from an anonymous file. */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1194 |
if (vma->vm_flags & VM_SHARED) { |
0f7fc9e4d [PATCH] VFS: chan... |
1195 |
if (vma->vm_file->f_path.dentry->d_inode->i_nlink == 0) { |
ee78b0a61 coredump masking:... |
1196 1197 1198 1199 |
dump_ok = test_bit(MMF_DUMP_ANON_SHARED, &mm_flags); kdcore("%08lx: %08lx: %s (share)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1200 |
} |
ee78b0a61 coredump masking:... |
1201 1202 1203 1204 |
dump_ok = test_bit(MMF_DUMP_MAPPED_SHARED, &mm_flags); kdcore("%08lx: %08lx: %s (share)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1205 1206 1207 |
} #ifdef CONFIG_MMU |
ee78b0a61 coredump masking:... |
1208 |
/* By default, if it hasn't been written to, don't write it out */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1209 |
if (!vma->anon_vma) { |
ee78b0a61 coredump masking:... |
1210 1211 1212 1213 |
dump_ok = test_bit(MMF_DUMP_MAPPED_PRIVATE, &mm_flags); kdcore("%08lx: %08lx: %s (!anon)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1214 1215 |
} #endif |
ee78b0a61 coredump masking:... |
1216 1217 1218 1219 |
dump_ok = test_bit(MMF_DUMP_ANON_PRIVATE, &mm_flags); kdcore("%08lx: %08lx: %s", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 |
} /* An ELF note in memory */ struct memelfnote { const char *name; int type; unsigned int datasz; void *data; }; static int notesize(struct memelfnote *en) { int sz; sz = sizeof(struct elf_note); sz += roundup(strlen(en->name) + 1, 4); sz += roundup(en->datasz, 4); return sz; } /* #define DEBUG */ |
05f47fda9 coredump: unify d... |
1243 1244 |
#define DUMP_WRITE(addr, nr, foffset) \ do { if (!dump_write(file, (addr), (nr))) return 0; *foffset += (nr); } while(0) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1245 |
|
05f47fda9 coredump: unify d... |
1246 |
static int alignfile(struct file *file, loff_t *foffset) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1247 |
{ |
05f47fda9 coredump: unify d... |
1248 1249 1250 1251 |
static const char buf[4] = { 0, }; DUMP_WRITE(buf, roundup(*foffset, 4) - *foffset, foffset); return 1; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1252 |
|
05f47fda9 coredump: unify d... |
1253 1254 1255 1256 |
static int writenote(struct memelfnote *men, struct file *file, loff_t *foffset) { struct elf_note en; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1257 1258 1259 |
en.n_namesz = strlen(men->name) + 1; en.n_descsz = men->datasz; en.n_type = men->type; |
05f47fda9 coredump: unify d... |
1260 1261 1262 1263 1264 1265 1266 |
DUMP_WRITE(&en, sizeof(en), foffset); DUMP_WRITE(men->name, en.n_namesz, foffset); if (!alignfile(file, foffset)) return 0; DUMP_WRITE(men->data, men->datasz, foffset); if (!alignfile(file, foffset)) return 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1267 1268 1269 1270 |
return 1; } #undef DUMP_WRITE |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1271 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 |
static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs) { memcpy(elf->e_ident, ELFMAG, SELFMAG); elf->e_ident[EI_CLASS] = ELF_CLASS; elf->e_ident[EI_DATA] = ELF_DATA; elf->e_ident[EI_VERSION] = EV_CURRENT; elf->e_ident[EI_OSABI] = ELF_OSABI; memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD); elf->e_type = ET_CORE; elf->e_machine = ELF_ARCH; elf->e_version = EV_CURRENT; elf->e_entry = 0; elf->e_phoff = sizeof(struct elfhdr); elf->e_shoff = 0; elf->e_flags = ELF_FDPIC_CORE_EFLAGS; elf->e_ehsize = sizeof(struct elfhdr); elf->e_phentsize = sizeof(struct elf_phdr); elf->e_phnum = segs; elf->e_shentsize = 0; elf->e_shnum = 0; elf->e_shstrndx = 0; return; } static inline void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset) { phdr->p_type = PT_NOTE; phdr->p_offset = offset; phdr->p_vaddr = 0; phdr->p_paddr = 0; phdr->p_filesz = sz; phdr->p_memsz = 0; phdr->p_flags = 0; phdr->p_align = 0; return; } static inline void fill_note(struct memelfnote *note, const char *name, int type, unsigned int sz, void *data) { note->name = name; note->type = type; note->datasz = sz; note->data = data; return; } /* * fill up all the fields in prstatus from the given task struct, except |
3ad2f3fbb tree-wide: Assort... |
1322 |
* registers which need to be filled up separately. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1323 1324 1325 1326 1327 1328 1329 |
*/ static void fill_prstatus(struct elf_prstatus *prstatus, struct task_struct *p, long signr) { prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; prstatus->pr_sigpend = p->pending.signal.sig[0]; prstatus->pr_sighold = p->blocked.sig[0]; |
3b34fc588 elf_core_dump: us... |
1330 1331 1332 |
rcu_read_lock(); prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1333 |
prstatus->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1334 1335 |
prstatus->pr_pgrp = task_pgrp_vnr(p); prstatus->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1336 |
if (thread_group_leader(p)) { |
2515ddc6d binfmt_elf_fdpic:... |
1337 |
struct task_cputime cputime; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1338 |
/* |
2515ddc6d binfmt_elf_fdpic:... |
1339 1340 |
* This is the record for the group leader. It shows the * group-wide total, not its individual thread total. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1341 |
*/ |
2515ddc6d binfmt_elf_fdpic:... |
1342 1343 1344 |
thread_group_cputime(p, &cputime); cputime_to_timeval(cputime.utime, &prstatus->pr_utime); cputime_to_timeval(cputime.stime, &prstatus->pr_stime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 |
} else { cputime_to_timeval(p->utime, &prstatus->pr_utime); cputime_to_timeval(p->stime, &prstatus->pr_stime); } cputime_to_timeval(p->signal->cutime, &prstatus->pr_cutime); cputime_to_timeval(p->signal->cstime, &prstatus->pr_cstime); prstatus->pr_exec_fdpic_loadmap = p->mm->context.exec_fdpic_loadmap; prstatus->pr_interp_fdpic_loadmap = p->mm->context.interp_fdpic_loadmap; } static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p, struct mm_struct *mm) { |
c69e8d9c0 CRED: Use RCU to ... |
1359 |
const struct cred *cred; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 |
unsigned int i, len; /* first copy the parameters from user space */ memset(psinfo, 0, sizeof(struct elf_prpsinfo)); len = mm->arg_end - mm->arg_start; if (len >= ELF_PRARGSZ) len = ELF_PRARGSZ - 1; if (copy_from_user(&psinfo->pr_psargs, (const char __user *) mm->arg_start, len)) return -EFAULT; for (i = 0; i < len; i++) if (psinfo->pr_psargs[i] == 0) psinfo->pr_psargs[i] = ' '; psinfo->pr_psargs[len] = 0; |
3b34fc588 elf_core_dump: us... |
1375 1376 1377 |
rcu_read_lock(); psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1378 |
psinfo->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1379 1380 |
psinfo->pr_pgrp = task_pgrp_vnr(p); psinfo->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1381 1382 1383 1384 1385 1386 1387 |
i = p->state ? ffz(~p->state) + 1 : 0; psinfo->pr_state = i; psinfo->pr_sname = (i > 5) ? '.' : "RSDTZW"[i]; psinfo->pr_zomb = psinfo->pr_sname == 'Z'; psinfo->pr_nice = task_nice(p); psinfo->pr_flag = p->flags; |
c69e8d9c0 CRED: Use RCU to ... |
1388 1389 1390 1391 1392 |
rcu_read_lock(); cred = __task_cred(p); SET_UID(psinfo->pr_uid, cred->uid); SET_GID(psinfo->pr_gid, cred->gid); rcu_read_unlock(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 |
strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname)); return 0; } /* Here is the structure in which status of each thread is captured. */ struct elf_thread_status { struct list_head list; struct elf_prstatus prstatus; /* NT_PRSTATUS */ elf_fpregset_t fpu; /* NT_PRFPREG */ struct task_struct *thread; #ifdef ELF_CORE_COPY_XFPREGS |
5b20cd80b x86: replace NT_P... |
1406 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 |
#endif struct memelfnote notes[3]; int num_notes; }; /* * In order to add the specific thread information for the elf file format, * we need to keep a linked list of every thread's pr_status and then create * a single section for them in the final core file. */ static int elf_dump_thread_status(long signr, struct elf_thread_status *t) { struct task_struct *p = t->thread; int sz = 0; t->num_notes = 0; fill_prstatus(&t->prstatus, p, signr); elf_core_copy_task_regs(p, &t->prstatus.pr_reg); fill_note(&t->notes[0], "CORE", NT_PRSTATUS, sizeof(t->prstatus), &t->prstatus); t->num_notes++; sz += notesize(&t->notes[0]); t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu); if (t->prstatus.pr_fpvalid) { fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu), &t->fpu); t->num_notes++; sz += notesize(&t->notes[1]); } #ifdef ELF_CORE_COPY_XFPREGS if (elf_core_copy_task_xfpregs(p, &t->xfpu)) { |
5b20cd80b x86: replace NT_P... |
1442 1443 |
fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu), &t->xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1444 1445 1446 1447 1448 1449 |
t->num_notes++; sz += notesize(&t->notes[2]); } #endif return sz; } |
8d9032bbe elf coredump: add... |
1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 |
static void fill_extnum_info(struct elfhdr *elf, struct elf_shdr *shdr4extnum, elf_addr_t e_shoff, int segs) { elf->e_shoff = e_shoff; elf->e_shentsize = sizeof(*shdr4extnum); elf->e_shnum = 1; elf->e_shstrndx = SHN_UNDEF; memset(shdr4extnum, 0, sizeof(*shdr4extnum)); shdr4extnum->sh_type = SHT_NULL; shdr4extnum->sh_size = elf->e_shnum; shdr4extnum->sh_link = elf->e_shstrndx; shdr4extnum->sh_info = segs; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1465 1466 1467 1468 |
/* * dump the segments for an MMU process */ #ifdef CONFIG_MMU |
e2e00906a coredump masking:... |
1469 |
static int elf_fdpic_dump_segments(struct file *file, size_t *size, |
ee78b0a61 coredump masking:... |
1470 |
unsigned long *limit, unsigned long mm_flags) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1471 1472 |
{ struct vm_area_struct *vma; |
f3e8fccd0 mm: add get_dump_... |
1473 |
int err = 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1474 1475 1476 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { unsigned long addr; |
ee78b0a61 coredump masking:... |
1477 |
if (!maydump(vma, mm_flags)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1478 |
continue; |
f3e8fccd0 mm: add get_dump_... |
1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 |
for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { struct page *page = get_dump_page(addr); if (page) { void *kaddr = kmap(page); *size += PAGE_SIZE; if (*size > *limit) err = -EFBIG; else if (!dump_write(file, kaddr, PAGE_SIZE)) err = -EIO; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1489 1490 |
kunmap(page); page_cache_release(page); |
05f47fda9 coredump: unify d... |
1491 |
} else if (!dump_seek(file, PAGE_SIZE)) |
f3e8fccd0 mm: add get_dump_... |
1492 1493 1494 |
err = -EFBIG; if (err) goto out; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1495 1496 |
} } |
f3e8fccd0 mm: add get_dump_... |
1497 1498 |
out: return err; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1499 1500 1501 1502 1503 1504 1505 |
} #endif /* * dump the segments for a NOMMU process */ #ifndef CONFIG_MMU |
e2e00906a coredump masking:... |
1506 |
static int elf_fdpic_dump_segments(struct file *file, size_t *size, |
ee78b0a61 coredump masking:... |
1507 |
unsigned long *limit, unsigned long mm_flags) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1508 |
{ |
8feae1311 NOMMU: Make VMAs ... |
1509 |
struct vm_area_struct *vma; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1510 |
|
8feae1311 NOMMU: Make VMAs ... |
1511 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
ee78b0a61 coredump masking:... |
1512 |
if (!maydump(vma, mm_flags)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 |
continue; if ((*size += PAGE_SIZE) > *limit) return -EFBIG; if (!dump_write(file, (void *) vma->vm_start, vma->vm_end - vma->vm_start)) return -EIO; } return 0; } #endif |
8d9032bbe elf coredump: add... |
1526 1527 1528 1529 |
static size_t elf_core_vma_data_size(unsigned long mm_flags) { struct vm_area_struct *vma; size_t size = 0; |
47568d4c5 FDPIC: For-loop i... |
1530 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) |
8d9032bbe elf coredump: add... |
1531 1532 1533 1534 |
if (maydump(vma, mm_flags)) size += vma->vm_end - vma->vm_start; return size; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1535 1536 1537 1538 1539 1540 1541 |
/* * Actual dumper * * This is a two-pass process; first we find the offsets of the bits, * and then they are actually written out. If we run out of core limit * we just truncate. */ |
f6151dfea mm: introduce cor... |
1542 |
static int elf_fdpic_core_dump(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1543 1544 1545 1546 1547 1548 1549 1550 1551 |
{ #define NUM_NOTES 6 int has_dumped = 0; mm_segment_t fs; int segs; size_t size = 0; int i; struct vm_area_struct *vma; struct elfhdr *elf = NULL; |
05f47fda9 coredump: unify d... |
1552 |
loff_t offset = 0, dataoff, foffset; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1553 1554 1555 1556 |
int numnote; struct memelfnote *notes = NULL; struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1557 1558 1559 1560 1561 1562 1563 |
LIST_HEAD(thread_list); struct list_head *t; elf_fpregset_t *fpu = NULL; #ifdef ELF_CORE_COPY_XFPREGS elf_fpxregset_t *xfpu = NULL; #endif int thread_status_size = 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1564 |
elf_addr_t *auxv; |
93eb211e6 elf coredump: mak... |
1565 |
struct elf_phdr *phdr4note = NULL; |
8d9032bbe elf coredump: add... |
1566 1567 1568 |
struct elf_shdr *shdr4extnum = NULL; Elf_Half e_phnum; elf_addr_t e_shoff; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 |
/* * We no longer stop all VM operations. * * This is because those proceses that could possibly change map_count * or the mmap / vma pages are now blocked in do_exit on current * finishing this core dump. * * Only ptrace can touch these memory addresses, but it doesn't change * the map_count or the pages allocated. So no possibility of crashing * exists while dumping the mm->vm_next areas to the core file. */ /* alloc memory for large data structures: too large to be on stack */ elf = kmalloc(sizeof(*elf), GFP_KERNEL); if (!elf) goto cleanup; prstatus = kzalloc(sizeof(*prstatus), GFP_KERNEL); if (!prstatus) goto cleanup; psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL); if (!psinfo) goto cleanup; notes = kmalloc(NUM_NOTES * sizeof(struct memelfnote), GFP_KERNEL); if (!notes) goto cleanup; fpu = kmalloc(sizeof(*fpu), GFP_KERNEL); if (!fpu) goto cleanup; #ifdef ELF_CORE_COPY_XFPREGS xfpu = kmalloc(sizeof(*xfpu), GFP_KERNEL); if (!xfpu) goto cleanup; #endif |
f6151dfea mm: introduce cor... |
1603 |
if (cprm->signr) { |
182c515fd coredump: elf_fdp... |
1604 |
struct core_thread *ct; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1605 |
struct elf_thread_status *tmp; |
182c515fd coredump: elf_fdp... |
1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 |
for (ct = current->mm->core_state->dumper.next; ct; ct = ct->next) { tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); if (!tmp) goto cleanup; tmp->thread = ct->task; list_add(&tmp->list, &thread_list); } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1616 1617 1618 1619 1620 |
list_for_each(t, &thread_list) { struct elf_thread_status *tmp; int sz; tmp = list_entry(t, struct elf_thread_status, list); |
f6151dfea mm: introduce cor... |
1621 |
sz = elf_dump_thread_status(cprm->signr, tmp); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1622 1623 1624 1625 1626 |
thread_status_size += sz; } } /* now collect the dump for the current */ |
f6151dfea mm: introduce cor... |
1627 1628 |
fill_prstatus(prstatus, current, cprm->signr); elf_core_copy_regs(&prstatus->pr_reg, cprm->regs); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1629 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1630 |
segs = current->mm->map_count; |
1fcccbac8 elf coredump: rep... |
1631 |
segs += elf_core_extra_phdrs(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1632 |
|
8d9032bbe elf coredump: add... |
1633 1634 1635 1636 1637 1638 1639 |
/* for notes section */ segs++; /* If segs > PN_XNUM(0xffff), then e_phnum overflows. To avoid * this, kernel supports extended numbering. Have a look at * include/linux/elf.h for further information. */ e_phnum = segs > PN_XNUM ? PN_XNUM : segs; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1640 |
/* Set up header */ |
8d9032bbe elf coredump: add... |
1641 |
fill_elf_fdpic_header(elf, e_phnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 |
has_dumped = 1; current->flags |= PF_DUMPCORE; /* * Set up the notes in similar form to SVR4 core dumps made * with info from their /proc. */ fill_note(notes + 0, "CORE", NT_PRSTATUS, sizeof(*prstatus), prstatus); fill_psinfo(psinfo, current->group_leader, current->mm); fill_note(notes + 1, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo); numnote = 2; auxv = (elf_addr_t *) current->mm->saved_auxv; i = 0; do i += 2; while (auxv[i - 2] != AT_NULL); fill_note(¬es[numnote++], "CORE", NT_AUXV, i * sizeof(elf_addr_t), auxv); /* Try to dump the FPU. */ if ((prstatus->pr_fpvalid = |
f6151dfea mm: introduce cor... |
1668 |
elf_core_copy_task_fpregs(current, cprm->regs, fpu))) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1669 1670 1671 1672 1673 |
fill_note(notes + numnote++, "CORE", NT_PRFPREG, sizeof(*fpu), fpu); #ifdef ELF_CORE_COPY_XFPREGS if (elf_core_copy_task_xfpregs(current, xfpu)) fill_note(notes + numnote++, |
5b20cd80b x86: replace NT_P... |
1674 |
"LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1675 1676 1677 1678 |
#endif fs = get_fs(); set_fs(KERNEL_DS); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1679 |
offset += sizeof(*elf); /* Elf header */ |
8d9032bbe elf coredump: add... |
1680 |
offset += segs * sizeof(struct elf_phdr); /* Program headers */ |
05f47fda9 coredump: unify d... |
1681 |
foffset = offset; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1682 1683 1684 |
/* Write notes phdr entry */ { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1685 1686 1687 1688 1689 1690 |
int sz = 0; for (i = 0; i < numnote; i++) sz += notesize(notes + i); sz += thread_status_size; |
93eb211e6 elf coredump: mak... |
1691 1692 |
phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL); if (!phdr4note) |
088e7af73 coredump: move du... |
1693 |
goto end_coredump; |
93eb211e6 elf coredump: mak... |
1694 1695 1696 |
fill_elf_note_phdr(phdr4note, sz, offset); offset += sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1697 1698 1699 1700 |
} /* Page-align dumped data */ dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
30736a4d4 coredump: pass mm... |
1701 |
offset += elf_core_vma_data_size(cprm->mm_flags); |
8d9032bbe elf coredump: add... |
1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 |
offset += elf_core_extra_data_size(); e_shoff = offset; if (e_phnum == PN_XNUM) { shdr4extnum = kmalloc(sizeof(*shdr4extnum), GFP_KERNEL); if (!shdr4extnum) goto end_coredump; fill_extnum_info(elf, shdr4extnum, e_shoff, segs); } offset = dataoff; |
93eb211e6 elf coredump: mak... |
1713 1714 1715 1716 1717 1718 1719 1720 |
size += sizeof(*elf); if (size > cprm->limit || !dump_write(cprm->file, elf, sizeof(*elf))) goto end_coredump; size += sizeof(*phdr4note); if (size > cprm->limit || !dump_write(cprm->file, phdr4note, sizeof(*phdr4note))) goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1721 |
/* write program headers for segments dump */ |
8feae1311 NOMMU: Make VMAs ... |
1722 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1723 1724 |
struct elf_phdr phdr; size_t sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1725 1726 1727 1728 1729 1730 |
sz = vma->vm_end - vma->vm_start; phdr.p_type = PT_LOAD; phdr.p_offset = offset; phdr.p_vaddr = vma->vm_start; phdr.p_paddr = 0; |
30736a4d4 coredump: pass mm... |
1731 |
phdr.p_filesz = maydump(vma, cprm->mm_flags) ? sz : 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1732 1733 1734 1735 1736 1737 1738 1739 |
phdr.p_memsz = sz; offset += phdr.p_filesz; phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0; if (vma->vm_flags & VM_WRITE) phdr.p_flags |= PF_W; if (vma->vm_flags & VM_EXEC) phdr.p_flags |= PF_X; phdr.p_align = ELF_EXEC_PAGESIZE; |
088e7af73 coredump: move du... |
1740 1741 1742 1743 |
size += sizeof(phdr); if (size > cprm->limit || !dump_write(cprm->file, &phdr, sizeof(phdr))) goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1744 |
} |
1fcccbac8 elf coredump: rep... |
1745 1746 |
if (!elf_core_write_extra_phdrs(cprm->file, offset, &size, cprm->limit)) goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1747 1748 1749 |
/* write out the notes section */ for (i = 0; i < numnote; i++) |
05f47fda9 coredump: unify d... |
1750 |
if (!writenote(notes + i, cprm->file, &foffset)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1751 1752 1753 1754 1755 1756 1757 1758 |
goto end_coredump; /* write out the thread status notes section */ list_for_each(t, &thread_list) { struct elf_thread_status *tmp = list_entry(t, struct elf_thread_status, list); for (i = 0; i < tmp->num_notes; i++) |
05f47fda9 coredump: unify d... |
1759 |
if (!writenote(&tmp->notes[i], cprm->file, &foffset)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1760 1761 |
goto end_coredump; } |
05f47fda9 coredump: unify d... |
1762 |
if (!dump_seek(cprm->file, dataoff - foffset)) |
f3e8fccd0 mm: add get_dump_... |
1763 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1764 |
|
f6151dfea mm: introduce cor... |
1765 |
if (elf_fdpic_dump_segments(cprm->file, &size, &cprm->limit, |
30736a4d4 coredump: pass mm... |
1766 |
cprm->mm_flags) < 0) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1767 |
goto end_coredump; |
1fcccbac8 elf coredump: rep... |
1768 1769 |
if (!elf_core_write_extra_data(cprm->file, &size, cprm->limit)) goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1770 |
|
8d9032bbe elf coredump: add... |
1771 1772 1773 1774 1775 1776 1777 |
if (e_phnum == PN_XNUM) { size += sizeof(*shdr4extnum); if (size > cprm->limit || !dump_write(cprm->file, shdr4extnum, sizeof(*shdr4extnum))) goto end_coredump; } |
2f48912d1 binfmt_elf_fdpic:... |
1778 |
if (cprm->file->f_pos != offset) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1779 1780 1781 1782 |
/* Sanity check */ printk(KERN_WARNING "elf_core_dump: file->f_pos (%lld) != offset (%lld) ", |
2f48912d1 binfmt_elf_fdpic:... |
1783 |
cprm->file->f_pos, offset); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 |
} end_coredump: set_fs(fs); cleanup: while (!list_empty(&thread_list)) { struct list_head *tmp = thread_list.next; list_del(tmp); kfree(list_entry(tmp, struct elf_thread_status, list)); } |
93eb211e6 elf coredump: mak... |
1795 |
kfree(phdr4note); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 |
kfree(elf); kfree(prstatus); kfree(psinfo); kfree(notes); kfree(fpu); #ifdef ELF_CORE_COPY_XFPREGS kfree(xfpu); #endif return has_dumped; #undef NUM_NOTES } |
698ba7b5a elf: kill USE_ELF... |
1807 |
#endif /* CONFIG_ELF_CORE */ |