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fs/binfmt_elf_fdpic.c
47.8 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 <linux/dax.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 *); |
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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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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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#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) { |
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register_binfmt(&elf_fdpic_format); return 0; |
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} |
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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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|
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static int is_elf(struct elfhdr *hdr, struct file *file) |
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{ if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0) return 0; if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN) return 0; |
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if (!elf_check_arch(hdr)) |
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return 0; |
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if (!file->f_op->mmap) |
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return 0; return 1; } |
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#ifndef elf_check_fdpic #define elf_check_fdpic(x) 0 #endif #ifndef elf_check_const_displacement #define elf_check_const_displacement(x) 0 #endif static int is_constdisp(struct elfhdr *hdr) { if (!elf_check_fdpic(hdr)) return 1; if (elf_check_const_displacement(hdr)) return 1; return 0; } |
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/*****************************************************************************/ /* * 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) |
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{ struct elf_fdpic_params exec_params, interp_params; |
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struct pt_regs *regs = current_pt_regs(); |
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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; |
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if (!is_elf(&exec_params.hdr, bprm->file)) |
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goto error; |
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if (!elf_check_fdpic(&exec_params.hdr)) { #ifdef CONFIG_MMU /* binfmt_elf handles non-fdpic elf except on nommu */ goto error; #else /* nommu can only load ET_DYN (PIE) ELF */ if (exec_params.hdr.e_type != ET_DYN) goto error; #endif } |
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/* 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. */ |
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would_dump(bprm, interpreter); |
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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; } } |
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if (is_constdisp(&exec_params.hdr)) |
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exec_params.flags |= ELF_FDPIC_FLAG_CONSTDISP; /* perform insanity checks on the interpreter */ if (interpreter_name) { retval = -ELIBBAD; |
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if (!is_elf(&interp_params.hdr, interpreter)) |
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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) |
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stack_size = 131072UL; /* same as exec.c's default commit */ |
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if (is_constdisp(&interp_params.hdr)) |
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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, |
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* defunct, deceased, etc. */ |
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if (elf_check_fdpic(&exec_params.hdr)) set_personality(PER_LINUX_FDPIC); else set_personality(PER_LINUX); |
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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; |
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#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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retval = setup_arg_pages(bprm, current->mm->start_stack, executable_stack); |
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if (retval < 0) goto error; |
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#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) |
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goto error; |
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if (interpreter_name) { retval = elf_fdpic_map_file(&interp_params, interpreter, current->mm, "interpreter"); if (retval < 0) { printk(KERN_ERR "Unable to load interpreter "); |
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goto error; |
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} 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 |
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/* create a stack area and zero-size brk area */ |
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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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current->mm->start_brk = vm_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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retval = current->mm->start_brk; current->mm->start_brk = 0; |
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goto error; |
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} |
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current->mm->brk = current->mm->start_brk; current->mm->context.end_brk = current->mm->start_brk; |
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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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if (create_elf_fdpic_tables(bprm, current->mm, &exec_params, &interp_params) < 0) |
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goto error; |
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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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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; |
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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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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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/* * 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; |
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if (__copy_to_user(u_platform, k_platform, platform_len) != 0) return -EFAULT; } |
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/* * 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; } |
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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; |
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if (copy_to_user((void __user *) sp, exec_params->loadmap, len) != 0) |
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|
537 538 539 540 541 542 |
return -EFAULT; current->mm->context.exec_fdpic_loadmap = (unsigned long) sp; if (interp_params->loadmap) { len = sizeof(struct elf32_fdpic_loadmap); |
8a2ab7f5d
|
543 544 |
len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs; |
1da177e4c
|
545 546 |
sp = (sp - len) & ~7UL; interp_params->map_addr = sp; |
8a2ab7f5d
|
547 548 |
if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0) |
1da177e4c
|
549 550 551 552 553 554 |
return -EFAULT; current->mm->context.interp_fdpic_loadmap = (unsigned long) sp; } /* force 16 byte _final_ alignment here for generality */ |
5edc2a512
|
555 |
#define DLINFO_ITEMS 15 |
1da177e4c
|
556 |
|
ec23847d6
|
557 558 |
nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) + (k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH; |
1da177e4c
|
559 |
|
5edc2a512
|
560 561 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) nitems++; |
1da177e4c
|
562 563 564 565 566 567 568 569 570 571 |
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
|
572 |
#define NEW_AUX_ENT(id, val) \ |
8a2ab7f5d
|
573 574 575 576 577 578 |
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
|
579 |
nr++; \ |
1da177e4c
|
580 |
} while (0) |
9b14ec35f
|
581 |
nr = 0; |
1da177e4c
|
582 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f
|
583 |
NEW_AUX_ENT(AT_NULL, 0); |
1da177e4c
|
584 |
if (k_platform) { |
9b14ec35f
|
585 |
nr = 0; |
1da177e4c
|
586 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f
|
587 |
NEW_AUX_ENT(AT_PLATFORM, |
8a2ab7f5d
|
588 |
(elf_addr_t) (unsigned long) u_platform); |
1da177e4c
|
589 |
} |
ec23847d6
|
590 591 592 593 594 595 |
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
|
596 597 598 599 600 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) { nr = 0; csp -= 2 * sizeof(unsigned long); NEW_AUX_ENT(AT_EXECFD, bprm->interp_data); } |
9b14ec35f
|
601 |
nr = 0; |
1da177e4c
|
602 |
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long); |
2171364d1
|
603 604 605 606 |
NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP); #ifdef ELF_HWCAP2 NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2); #endif |
9b14ec35f
|
607 608 609 610 611 612 613 614 |
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); |
ebc887b27
|
615 616 617 618 |
NEW_AUX_ENT(AT_UID, (elf_addr_t) from_kuid_munged(cred->user_ns, cred->uid)); NEW_AUX_ENT(AT_EUID, (elf_addr_t) from_kuid_munged(cred->user_ns, cred->euid)); NEW_AUX_ENT(AT_GID, (elf_addr_t) from_kgid_munged(cred->user_ns, cred->gid)); NEW_AUX_ENT(AT_EGID, (elf_addr_t) from_kgid_munged(cred->user_ns, cred->egid)); |
5edc2a512
|
619 620 |
NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm)); NEW_AUX_ENT(AT_EXECFN, bprm->exec); |
1da177e4c
|
621 622 |
#ifdef ARCH_DLINFO |
9b14ec35f
|
623 624 |
nr = 0; csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long); |
1da177e4c
|
625 626 627 628 629 630 631 632 633 |
/* 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
|
634 |
envp = (elf_caddr_t __user *) csp; |
1da177e4c
|
635 |
csp -= (bprm->argc + 1) * sizeof(elf_caddr_t); |
530018bf3
|
636 |
argv = (elf_caddr_t __user *) csp; |
1da177e4c
|
637 638 639 |
/* stack argc */ csp -= sizeof(unsigned long); |
530018bf3
|
640 |
__put_user(bprm->argc, (unsigned long __user *) csp); |
1da177e4c
|
641 |
|
88bcd5126
|
642 |
BUG_ON(csp != sp); |
1da177e4c
|
643 644 645 646 647 |
/* fill in the argv[] array */ #ifdef CONFIG_MMU current->mm->arg_start = bprm->p; #else |
8a2ab7f5d
|
648 649 |
current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p); |
1da177e4c
|
650 |
#endif |
530018bf3
|
651 |
p = (char __user *) current->mm->arg_start; |
1da177e4c
|
652 653 |
for (loop = bprm->argc; loop > 0; loop--) { __put_user((elf_caddr_t) p, argv++); |
b6a2fea39
|
654 655 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c
|
656 657 658 659 660 661 662 663 664 665 |
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
|
666 667 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c
|
668 669 670 671 672 673 674 675 |
return -EINVAL; p += len; } __put_user(NULL, envp); current->mm->env_end = (unsigned long) p; mm->start_stack = (unsigned long) sp; return 0; |
8a2ab7f5d
|
676 |
} |
1da177e4c
|
677 678 679 680 681 682 683 |
/*****************************************************************************/ /* * transfer the program arguments and environment from the holding pages onto * the stack */ #ifndef CONFIG_MMU |
8a2ab7f5d
|
684 685 |
static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned long *_sp) |
1da177e4c
|
686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 |
{ 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
|
705 |
out: |
1da177e4c
|
706 |
return ret; |
8a2ab7f5d
|
707 |
} |
1da177e4c
|
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 |
#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
|
747 |
loadmap = kzalloc(size, GFP_KERNEL); |
1da177e4c
|
748 749 750 751 |
if (!loadmap) return -ENOMEM; params->loadmap = loadmap; |
1da177e4c
|
752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 |
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
|
781 |
params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) { |
1da177e4c
|
782 |
params->entry_addr = |
8a2ab7f5d
|
783 784 |
(params->hdr.e_entry - seg->p_vaddr) + seg->addr; |
1da177e4c
|
785 786 787 788 789 790 |
break; } } } /* determine where the program header table has wound up if mapped */ |
8a2ab7f5d
|
791 792 |
stop = params->hdr.e_phoff; stop += params->hdr.e_phnum * sizeof (struct elf_phdr); |
1da177e4c
|
793 794 795 796 797 798 799 800 801 802 803 804 805 |
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
|
806 807 808 809 810 |
phdr->p_vaddr + phdr->p_filesz <= seg->p_vaddr + seg->p_memsz) { params->ph_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr + |
1da177e4c
|
811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 |
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
|
827 828 829 830 831 832 833 834 835 |
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
|
836 837 838 839 840 |
if (phdr->p_memsz == 0 || phdr->p_memsz % sizeof(Elf32_Dyn) != 0) goto dynamic_error; tmp = phdr->p_memsz / sizeof(Elf32_Dyn); |
8a2ab7f5d
|
841 842 |
if (((Elf32_Dyn *) params->dynamic_addr)[tmp - 1].d_tag != 0) |
1da177e4c
|
843 844 845 846 847 848 849 850 |
goto dynamic_error; break; } } break; } /* now elide adjacent segments in the load map on MMU linux |
8a2ab7f5d
|
851 852 |
* - on uClinux the holes between may actually be filled with system * stuff or stuff from other processes |
1da177e4c
|
853 854 855 856 857 858 859 860 861 862 |
*/ #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
|
863 864 865 |
mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz); |
1da177e4c
|
866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 |
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
|
892 |
dynamic_error: |
1da177e4c
|
893 894 |
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu) ", |
496ad9aa8
|
895 |
what, file_inode(file)->i_ino); |
1da177e4c
|
896 |
return -ELIBBAD; |
8a2ab7f5d
|
897 |
} |
1da177e4c
|
898 899 900 901 902 903 |
/*****************************************************************************/ /* * map a file with constant displacement under uClinux */ #ifndef CONFIG_MMU |
8a2ab7f5d
|
904 905 906 907 |
static int elf_fdpic_map_file_constdisp_on_uclinux( struct elf_fdpic_params *params, struct file *file, struct mm_struct *mm) |
1da177e4c
|
908 909 910 911 |
{ struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, base = ULONG_MAX, top = 0, maddr = 0, mflags; |
1da177e4c
|
912 913 914 915 |
int loop, ret; load_addr = params->load_addr; seg = params->loadmap->segs; |
8a2ab7f5d
|
916 917 |
/* determine the bounds of the contiguous overall allocation we must * make */ |
1da177e4c
|
918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 |
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; |
6be5ceb02
|
933 |
maddr = vm_mmap(NULL, load_addr, top - base, |
1da177e4c
|
934 |
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0); |
8a2ab7f5d
|
935 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c
|
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; |
1da177e4c
|
946 947 948 |
seg->addr = maddr + (phdr->p_vaddr - base); seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; |
3dc20cb28
|
949 950 |
ret = read_code(file, seg->addr, phdr->p_offset, phdr->p_filesz); |
1da177e4c
|
951 952 953 954 955 956 957 958 |
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
|
959 |
if (phdr->p_filesz < phdr->p_memsz) { |
e30c7c3b3
|
960 961 962 |
if (clear_user((void *) (seg->addr + phdr->p_filesz), phdr->p_memsz - phdr->p_filesz)) return -EFAULT; |
ab4ad5551
|
963 |
} |
1da177e4c
|
964 965 966 |
if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472
|
967 968 969 970 971 |
if (!mm->start_code) { mm->start_code = seg->addr; mm->end_code = seg->addr + phdr->p_memsz; } |
8a2ab7f5d
|
972 |
} else if (!mm->start_data) { |
1da177e4c
|
973 |
mm->start_data = seg->addr; |
1da177e4c
|
974 |
mm->end_data = seg->addr + phdr->p_memsz; |
1da177e4c
|
975 |
} |
1da177e4c
|
976 977 978 979 980 981 |
} seg++; } return 0; |
8a2ab7f5d
|
982 |
} |
1da177e4c
|
983 984 985 986 987 988 989 990 991 992 993 994 995 |
#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
|
996 |
int loop, dvset; |
1da177e4c
|
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 1040 1041 1042 |
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
|
1043 1044 |
* - can be mapped anywhere, but must be mapped as a * unit |
1da177e4c
|
1045 1046 1047 1048 1049 |
*/ if (!dvset) { maddr = load_addr; delta_vaddr = phdr->p_vaddr; dvset = 1; |
8a2ab7f5d
|
1050 |
} else { |
1da177e4c
|
1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 |
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; |
6be5ceb02
|
1068 |
maddr = vm_mmap(file, maddr, phdr->p_memsz + disp, prot, flags, |
1da177e4c
|
1069 |
phdr->p_offset - disp); |
1da177e4c
|
1070 1071 |
kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx", |
8a2ab7f5d
|
1072 1073 |
loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp, maddr); |
1da177e4c
|
1074 |
|
8a2ab7f5d
|
1075 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c
|
1076 |
return (int) maddr; |
8a2ab7f5d
|
1077 1078 |
if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS) |
1da177e4c
|
1079 1080 1081 1082 1083 1084 1085 1086 1087 |
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
|
1088 1089 |
/* clear the bit between beginning of mapping and beginning of * PT_LOAD */ |
1da177e4c
|
1090 1091 |
if (prot & PROT_WRITE && disp > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp); |
e30c7c3b3
|
1092 1093 |
if (clear_user((void __user *) maddr, disp)) return -EFAULT; |
1da177e4c
|
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 |
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
|
1106 1107 1108 1109 1110 |
if (excess > excess1) { unsigned long xaddr = maddr + phdr->p_filesz + excess1; unsigned long xmaddr; flags |= MAP_FIXED | MAP_ANONYMOUS; |
6be5ceb02
|
1111 |
xmaddr = vm_mmap(NULL, xaddr, excess - excess1, |
8a2ab7f5d
|
1112 |
prot, flags, 0); |
1da177e4c
|
1113 1114 1115 |
kdebug("mmap[%d] <anon>" " ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx", |
8a2ab7f5d
|
1116 1117 |
loop, xaddr, excess - excess1, prot, flags, xmaddr); |
1da177e4c
|
1118 1119 1120 1121 1122 1123 1124 1125 |
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
|
1126 1127 1128 |
if (clear_user((void __user *) maddr + phdr->p_filesz, excess1)) return -EFAULT; |
1da177e4c
|
1129 1130 1131 1132 1133 1134 |
} #else if (excess > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess); |
e30c7c3b3
|
1135 1136 |
if (clear_user((void *) maddr + phdr->p_filesz, excess)) return -EFAULT; |
1da177e4c
|
1137 1138 1139 1140 1141 |
} #endif if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472
|
1142 1143 1144 1145 |
if (!mm->start_code) { mm->start_code = maddr; mm->end_code = maddr + phdr->p_memsz; } |
8a2ab7f5d
|
1146 |
} else if (!mm->start_data) { |
1da177e4c
|
1147 1148 1149 1150 1151 1152 1153 1154 1155 |
mm->start_data = maddr; mm->end_data = maddr + phdr->p_memsz; } } seg++; } return 0; |
8a2ab7f5d
|
1156 |
} |
6d8c4e3b0
|
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 |
/*****************************************************************************/ /* * 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
|
1167 |
#ifdef CONFIG_ELF_CORE |
6d8c4e3b0
|
1168 1169 |
/* |
6d8c4e3b0
|
1170 1171 1172 1173 1174 1175 |
* 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
|
1176 |
static int maydump(struct vm_area_struct *vma, unsigned long mm_flags) |
6d8c4e3b0
|
1177 |
{ |
ee78b0a61
|
1178 |
int dump_ok; |
6d8c4e3b0
|
1179 |
/* Do not dump I/O mapped devices or special mappings */ |
314e51b98
|
1180 |
if (vma->vm_flags & VM_IO) { |
6d8c4e3b0
|
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 |
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; } |
ab27a8d04
|
1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 |
/* support for DAX */ if (vma_is_dax(vma)) { if (vma->vm_flags & VM_SHARED) { dump_ok = test_bit(MMF_DUMP_DAX_SHARED, &mm_flags); kdcore("%08lx: %08lx: %s (DAX shared)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); } else { dump_ok = test_bit(MMF_DUMP_DAX_PRIVATE, &mm_flags); kdcore("%08lx: %08lx: %s (DAX private)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); } return dump_ok; } |
ee78b0a61
|
1205 |
/* By default, dump shared memory if mapped from an anonymous file. */ |
6d8c4e3b0
|
1206 |
if (vma->vm_flags & VM_SHARED) { |
496ad9aa8
|
1207 |
if (file_inode(vma->vm_file)->i_nlink == 0) { |
ee78b0a61
|
1208 1209 1210 1211 |
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
|
1212 |
} |
ee78b0a61
|
1213 1214 1215 1216 |
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
|
1217 1218 1219 |
} #ifdef CONFIG_MMU |
ee78b0a61
|
1220 |
/* By default, if it hasn't been written to, don't write it out */ |
6d8c4e3b0
|
1221 |
if (!vma->anon_vma) { |
ee78b0a61
|
1222 1223 1224 1225 |
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
|
1226 1227 |
} #endif |
ee78b0a61
|
1228 1229 1230 1231 |
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
|
1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 |
} /* 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 */ |
e6c1baa9b
|
1255 |
static int writenote(struct memelfnote *men, struct coredump_params *cprm) |
05f47fda9
|
1256 1257 |
{ struct elf_note en; |
6d8c4e3b0
|
1258 1259 1260 |
en.n_namesz = strlen(men->name) + 1; en.n_descsz = men->datasz; en.n_type = men->type; |
e6c1baa9b
|
1261 |
return dump_emit(cprm, &en, sizeof(en)) && |
22a8cb824
|
1262 1263 |
dump_emit(cprm, men->name, en.n_namesz) && dump_align(cprm, 4) && dump_emit(cprm, men->data, men->datasz) && dump_align(cprm, 4); |
6d8c4e3b0
|
1264 |
} |
6d8c4e3b0
|
1265 |
|
6d8c4e3b0
|
1266 1267 1268 1269 1270 1271 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 |
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
|
1316 |
* registers which need to be filled up separately. |
6d8c4e3b0
|
1317 1318 1319 1320 1321 1322 1323 |
*/ 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
|
1324 1325 1326 |
rcu_read_lock(); prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3
|
1327 |
prstatus->pr_pid = task_pid_vnr(p); |
b488893a3
|
1328 1329 |
prstatus->pr_pgrp = task_pgrp_vnr(p); prstatus->pr_sid = task_session_vnr(p); |
6d8c4e3b0
|
1330 |
if (thread_group_leader(p)) { |
2515ddc6d
|
1331 |
struct task_cputime cputime; |
6d8c4e3b0
|
1332 |
/* |
2515ddc6d
|
1333 1334 |
* This is the record for the group leader. It shows the * group-wide total, not its individual thread total. |
6d8c4e3b0
|
1335 |
*/ |
2515ddc6d
|
1336 1337 1338 |
thread_group_cputime(p, &cputime); cputime_to_timeval(cputime.utime, &prstatus->pr_utime); cputime_to_timeval(cputime.stime, &prstatus->pr_stime); |
6d8c4e3b0
|
1339 |
} else { |
6fac4829c
|
1340 1341 1342 1343 1344 |
cputime_t utime, stime; task_cputime(p, &utime, &stime); cputime_to_timeval(utime, &prstatus->pr_utime); cputime_to_timeval(stime, &prstatus->pr_stime); |
6d8c4e3b0
|
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 |
} 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
|
1356 |
const struct cred *cred; |
6d8c4e3b0
|
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 |
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
|
1372 1373 1374 |
rcu_read_lock(); psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3
|
1375 |
psinfo->pr_pid = task_pid_vnr(p); |
b488893a3
|
1376 1377 |
psinfo->pr_pgrp = task_pgrp_vnr(p); psinfo->pr_sid = task_session_vnr(p); |
6d8c4e3b0
|
1378 1379 1380 1381 1382 1383 1384 |
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
|
1385 1386 |
rcu_read_lock(); cred = __task_cred(p); |
ebc887b27
|
1387 1388 |
SET_UID(psinfo->pr_uid, from_kuid_munged(cred->user_ns, cred->uid)); SET_GID(psinfo->pr_gid, from_kgid_munged(cred->user_ns, cred->gid)); |
c69e8d9c0
|
1389 |
rcu_read_unlock(); |
6d8c4e3b0
|
1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 |
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
|
1403 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ |
6d8c4e3b0
|
1404 1405 1406 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 |
#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
|
1439 1440 |
fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu), &t->xfpu); |
6d8c4e3b0
|
1441 1442 1443 1444 1445 1446 |
t->num_notes++; sz += notesize(&t->notes[2]); } #endif return sz; } |
8d9032bbe
|
1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 |
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
|
1462 1463 1464 |
/* * dump the segments for an MMU process */ |
e6c1baa9b
|
1465 |
static bool elf_fdpic_dump_segments(struct coredump_params *cprm) |
6d8c4e3b0
|
1466 1467 1468 1469 1470 |
{ struct vm_area_struct *vma; for (vma = current->mm->mmap; vma; vma = vma->vm_next) { unsigned long addr; |
e6c1baa9b
|
1471 |
if (!maydump(vma, cprm->mm_flags)) |
6d8c4e3b0
|
1472 |
continue; |
e6c1baa9b
|
1473 |
#ifdef CONFIG_MMU |
f3e8fccd0
|
1474 1475 |
for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { |
e6c1baa9b
|
1476 |
bool res; |
f3e8fccd0
|
1477 1478 1479 |
struct page *page = get_dump_page(addr); if (page) { void *kaddr = kmap(page); |
e6c1baa9b
|
1480 |
res = dump_emit(cprm, kaddr, PAGE_SIZE); |
6d8c4e3b0
|
1481 1482 |
kunmap(page); page_cache_release(page); |
e6c1baa9b
|
1483 |
} else { |
9b56d5438
|
1484 |
res = dump_skip(cprm, PAGE_SIZE); |
e6c1baa9b
|
1485 1486 1487 |
} if (!res) return false; |
6d8c4e3b0
|
1488 |
} |
e6c1baa9b
|
1489 1490 |
#else if (!dump_emit(cprm, (void *) vma->vm_start, |
6d8c4e3b0
|
1491 |
vma->vm_end - vma->vm_start)) |
e6c1baa9b
|
1492 1493 |
return false; #endif |
6d8c4e3b0
|
1494 |
} |
e6c1baa9b
|
1495 |
return true; |
6d8c4e3b0
|
1496 |
} |
6d8c4e3b0
|
1497 |
|
8d9032bbe
|
1498 1499 1500 1501 |
static size_t elf_core_vma_data_size(unsigned long mm_flags) { struct vm_area_struct *vma; size_t size = 0; |
47568d4c5
|
1502 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) |
8d9032bbe
|
1503 1504 1505 1506 |
if (maydump(vma, mm_flags)) size += vma->vm_end - vma->vm_start; return size; } |
6d8c4e3b0
|
1507 1508 1509 1510 1511 1512 1513 |
/* * 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
|
1514 |
static int elf_fdpic_core_dump(struct coredump_params *cprm) |
6d8c4e3b0
|
1515 1516 1517 1518 1519 |
{ #define NUM_NOTES 6 int has_dumped = 0; mm_segment_t fs; int segs; |
6d8c4e3b0
|
1520 1521 1522 |
int i; struct vm_area_struct *vma; struct elfhdr *elf = NULL; |
9b56d5438
|
1523 |
loff_t offset = 0, dataoff; |
6d8c4e3b0
|
1524 1525 1526 1527 |
int numnote; struct memelfnote *notes = NULL; struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */ |
6d8c4e3b0
|
1528 1529 1530 1531 1532 1533 1534 |
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
|
1535 |
elf_addr_t *auxv; |
93eb211e6
|
1536 |
struct elf_phdr *phdr4note = NULL; |
8d9032bbe
|
1537 1538 1539 |
struct elf_shdr *shdr4extnum = NULL; Elf_Half e_phnum; elf_addr_t e_shoff; |
afabada95
|
1540 1541 |
struct core_thread *ct; struct elf_thread_status *tmp; |
6d8c4e3b0
|
1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 |
/* * 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 |
afabada95
|
1576 1577 1578 1579 1580 |
for (ct = current->mm->core_state->dumper.next; ct; ct = ct->next) { tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); if (!tmp) goto cleanup; |
182c515fd
|
1581 |
|
afabada95
|
1582 1583 1584 |
tmp->thread = ct->task; list_add(&tmp->list, &thread_list); } |
182c515fd
|
1585 |
|
afabada95
|
1586 1587 1588 |
list_for_each(t, &thread_list) { struct elf_thread_status *tmp; int sz; |
6d8c4e3b0
|
1589 |
|
afabada95
|
1590 1591 1592 |
tmp = list_entry(t, struct elf_thread_status, list); sz = elf_dump_thread_status(cprm->siginfo->si_signo, tmp); thread_status_size += sz; |
6d8c4e3b0
|
1593 1594 1595 |
} /* now collect the dump for the current */ |
5ab1c309b
|
1596 |
fill_prstatus(prstatus, current, cprm->siginfo->si_signo); |
f6151dfea
|
1597 |
elf_core_copy_regs(&prstatus->pr_reg, cprm->regs); |
6d8c4e3b0
|
1598 |
|
6d8c4e3b0
|
1599 |
segs = current->mm->map_count; |
1fcccbac8
|
1600 |
segs += elf_core_extra_phdrs(); |
6d8c4e3b0
|
1601 |
|
8d9032bbe
|
1602 1603 1604 1605 1606 1607 1608 |
/* 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
|
1609 |
/* Set up header */ |
8d9032bbe
|
1610 |
fill_elf_fdpic_header(elf, e_phnum); |
6d8c4e3b0
|
1611 1612 |
has_dumped = 1; |
6d8c4e3b0
|
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 |
/* * 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
|
1635 |
elf_core_copy_task_fpregs(current, cprm->regs, fpu))) |
6d8c4e3b0
|
1636 1637 1638 1639 1640 |
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
|
1641 |
"LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu); |
6d8c4e3b0
|
1642 1643 1644 1645 |
#endif fs = get_fs(); set_fs(KERNEL_DS); |
6d8c4e3b0
|
1646 |
offset += sizeof(*elf); /* Elf header */ |
8d9032bbe
|
1647 |
offset += segs * sizeof(struct elf_phdr); /* Program headers */ |
6d8c4e3b0
|
1648 1649 1650 |
/* Write notes phdr entry */ { |
6d8c4e3b0
|
1651 1652 1653 1654 1655 1656 |
int sz = 0; for (i = 0; i < numnote; i++) sz += notesize(notes + i); sz += thread_status_size; |
93eb211e6
|
1657 1658 |
phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL); if (!phdr4note) |
088e7af73
|
1659 |
goto end_coredump; |
93eb211e6
|
1660 1661 1662 |
fill_elf_note_phdr(phdr4note, sz, offset); offset += sz; |
6d8c4e3b0
|
1663 1664 1665 1666 |
} /* Page-align dumped data */ dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
30736a4d4
|
1667 |
offset += elf_core_vma_data_size(cprm->mm_flags); |
8d9032bbe
|
1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 |
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; |
e6c1baa9b
|
1679 |
if (!dump_emit(cprm, elf, sizeof(*elf))) |
93eb211e6
|
1680 |
goto end_coredump; |
e6c1baa9b
|
1681 |
if (!dump_emit(cprm, phdr4note, sizeof(*phdr4note))) |
93eb211e6
|
1682 |
goto end_coredump; |
6d8c4e3b0
|
1683 |
/* write program headers for segments dump */ |
8feae1311
|
1684 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
6d8c4e3b0
|
1685 1686 |
struct elf_phdr phdr; size_t sz; |
6d8c4e3b0
|
1687 1688 1689 1690 1691 1692 |
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
|
1693 |
phdr.p_filesz = maydump(vma, cprm->mm_flags) ? sz : 0; |
6d8c4e3b0
|
1694 1695 1696 1697 1698 1699 1700 1701 |
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; |
e6c1baa9b
|
1702 |
if (!dump_emit(cprm, &phdr, sizeof(phdr))) |
088e7af73
|
1703 |
goto end_coredump; |
6d8c4e3b0
|
1704 |
} |
506f21c55
|
1705 |
if (!elf_core_write_extra_phdrs(cprm, offset)) |
1fcccbac8
|
1706 |
goto end_coredump; |
6d8c4e3b0
|
1707 1708 1709 |
/* write out the notes section */ for (i = 0; i < numnote; i++) |
e6c1baa9b
|
1710 |
if (!writenote(notes + i, cprm)) |
6d8c4e3b0
|
1711 1712 1713 1714 1715 1716 1717 1718 |
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++) |
e6c1baa9b
|
1719 |
if (!writenote(&tmp->notes[i], cprm)) |
6d8c4e3b0
|
1720 1721 |
goto end_coredump; } |
9b56d5438
|
1722 |
if (!dump_skip(cprm, dataoff - cprm->written)) |
f3e8fccd0
|
1723 |
goto end_coredump; |
6d8c4e3b0
|
1724 |
|
e6c1baa9b
|
1725 |
if (!elf_fdpic_dump_segments(cprm)) |
6d8c4e3b0
|
1726 |
goto end_coredump; |
aa3e7eaf0
|
1727 |
if (!elf_core_write_extra_data(cprm)) |
1fcccbac8
|
1728 |
goto end_coredump; |
6d8c4e3b0
|
1729 |
|
8d9032bbe
|
1730 |
if (e_phnum == PN_XNUM) { |
e6c1baa9b
|
1731 |
if (!dump_emit(cprm, shdr4extnum, sizeof(*shdr4extnum))) |
8d9032bbe
|
1732 1733 |
goto end_coredump; } |
2f48912d1
|
1734 |
if (cprm->file->f_pos != offset) { |
6d8c4e3b0
|
1735 1736 1737 1738 |
/* Sanity check */ printk(KERN_WARNING "elf_core_dump: file->f_pos (%lld) != offset (%lld) ", |
2f48912d1
|
1739 |
cprm->file->f_pos, offset); |
6d8c4e3b0
|
1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 |
} 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
|
1751 |
kfree(phdr4note); |
6d8c4e3b0
|
1752 1753 1754 1755 1756 |
kfree(elf); kfree(prstatus); kfree(psinfo); kfree(notes); kfree(fpu); |
bcb65a797
|
1757 |
kfree(shdr4extnum); |
6d8c4e3b0
|
1758 1759 1760 1761 1762 1763 |
#ifdef ELF_CORE_COPY_XFPREGS kfree(xfpu); #endif return has_dumped; #undef NUM_NOTES } |
698ba7b5a
|
1764 |
#endif /* CONFIG_ELF_CORE */ |