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fs/binfmt_elf_fdpic.c
46.9 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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|
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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_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) { |
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register_binfmt(&elf_fdpic_format); return 0; |
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} |
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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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|
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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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|
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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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|
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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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|
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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; |
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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) { |
86a264abe CRED: Wrap curren... |
474 |
const struct cred *cred = current_cred(); |
1da177e4c Linux-2.6.12-rc2 |
475 |
unsigned long sp, csp, nitems; |
530018bf3 [PATCH] frv: binf... |
476 |
elf_caddr_t __user *argv, *envp; |
1da177e4c Linux-2.6.12-rc2 |
477 |
size_t platform_len = 0, len; |
ec23847d6 binfmt_elf_fdpic:... |
478 479 |
char *k_platform, *k_base_platform; char __user *u_platform, *u_base_platform, *p; |
1da177e4c Linux-2.6.12-rc2 |
480 |
int loop; |
9b14ec35f binfmt_elf_fdpic:... |
481 |
int nr; /* reset for each csp adjustment */ |
1da177e4c Linux-2.6.12-rc2 |
482 |
|
1da177e4c Linux-2.6.12-rc2 |
483 |
#ifdef CONFIG_MMU |
c7637941d binfmt_elf_fdpic:... |
484 485 486 487 488 489 |
/* 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); |
1da177e4c Linux-2.6.12-rc2 |
490 491 492 493 |
#else sp = mm->start_stack; /* stack the program arguments and environment */ |
7e7ec6a93 elf_fdpic_transfe... |
494 |
if (transfer_args_to_stack(bprm, &sp) < 0) |
1da177e4c Linux-2.6.12-rc2 |
495 |
return -EFAULT; |
7e7ec6a93 elf_fdpic_transfe... |
496 |
sp &= ~15; |
1da177e4c Linux-2.6.12-rc2 |
497 |
#endif |
ec23847d6 binfmt_elf_fdpic:... |
498 499 500 501 502 503 |
/* * 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. */ |
1da177e4c Linux-2.6.12-rc2 |
504 |
k_platform = ELF_PLATFORM; |
1aeb21d62 [PATCH] FDPIC: Fi... |
505 |
u_platform = NULL; |
1da177e4c Linux-2.6.12-rc2 |
506 507 508 509 |
if (k_platform) { platform_len = strlen(k_platform) + 1; sp -= platform_len; |
530018bf3 [PATCH] frv: binf... |
510 |
u_platform = (char __user *) sp; |
1da177e4c Linux-2.6.12-rc2 |
511 512 513 |
if (__copy_to_user(u_platform, k_platform, platform_len) != 0) return -EFAULT; } |
ec23847d6 binfmt_elf_fdpic:... |
514 515 516 517 518 519 520 521 522 523 524 525 526 527 |
/* * 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 |
528 529 530 531 532 533 534 |
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... |
535 |
if (copy_to_user((void __user *) sp, exec_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
536 537 538 539 540 541 |
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... |
542 543 |
len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs; |
1da177e4c Linux-2.6.12-rc2 |
544 545 |
sp = (sp - len) & ~7UL; interp_params->map_addr = sp; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
546 547 |
if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
548 549 550 551 552 553 |
return -EFAULT; current->mm->context.interp_fdpic_loadmap = (unsigned long) sp; } /* force 16 byte _final_ alignment here for generality */ |
5edc2a512 binfmt_elf_fdpic:... |
554 |
#define DLINFO_ITEMS 15 |
1da177e4c Linux-2.6.12-rc2 |
555 |
|
ec23847d6 binfmt_elf_fdpic:... |
556 557 |
nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) + (k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH; |
1da177e4c Linux-2.6.12-rc2 |
558 |
|
5edc2a512 binfmt_elf_fdpic:... |
559 560 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) nitems++; |
1da177e4c Linux-2.6.12-rc2 |
561 562 563 564 565 566 567 568 569 570 |
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:... |
571 |
#define NEW_AUX_ENT(id, val) \ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
572 573 574 575 576 577 |
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:... |
578 |
nr++; \ |
1da177e4c Linux-2.6.12-rc2 |
579 |
} while (0) |
9b14ec35f binfmt_elf_fdpic:... |
580 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
581 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
582 |
NEW_AUX_ENT(AT_NULL, 0); |
1da177e4c Linux-2.6.12-rc2 |
583 |
if (k_platform) { |
9b14ec35f binfmt_elf_fdpic:... |
584 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
585 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
586 |
NEW_AUX_ENT(AT_PLATFORM, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
587 |
(elf_addr_t) (unsigned long) u_platform); |
1da177e4c Linux-2.6.12-rc2 |
588 |
} |
ec23847d6 binfmt_elf_fdpic:... |
589 590 591 592 593 594 |
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:... |
595 596 597 598 599 |
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:... |
600 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
601 |
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long); |
2171364d1 powerpc: Add HWCA... |
602 603 604 605 |
NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP); #ifdef ELF_HWCAP2 NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2); #endif |
9b14ec35f binfmt_elf_fdpic:... |
606 607 608 609 610 611 612 613 |
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 userns: Convert b... |
614 615 616 617 |
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 binfmt_elf_fdpic:... |
618 619 |
NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm)); NEW_AUX_ENT(AT_EXECFN, bprm->exec); |
1da177e4c Linux-2.6.12-rc2 |
620 621 |
#ifdef ARCH_DLINFO |
9b14ec35f binfmt_elf_fdpic:... |
622 623 |
nr = 0; csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long); |
1da177e4c Linux-2.6.12-rc2 |
624 625 626 627 628 629 630 631 632 |
/* 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... |
633 |
envp = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
634 |
csp -= (bprm->argc + 1) * sizeof(elf_caddr_t); |
530018bf3 [PATCH] frv: binf... |
635 |
argv = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
636 637 638 |
/* stack argc */ csp -= sizeof(unsigned long); |
530018bf3 [PATCH] frv: binf... |
639 |
__put_user(bprm->argc, (unsigned long __user *) csp); |
1da177e4c Linux-2.6.12-rc2 |
640 |
|
88bcd5126 BUG_ON() Conversi... |
641 |
BUG_ON(csp != sp); |
1da177e4c Linux-2.6.12-rc2 |
642 643 644 645 646 |
/* fill in the argv[] array */ #ifdef CONFIG_MMU current->mm->arg_start = bprm->p; #else |
8a2ab7f5d [PATCH] FDPIC: Ad... |
647 648 |
current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p); |
1da177e4c Linux-2.6.12-rc2 |
649 |
#endif |
530018bf3 [PATCH] frv: binf... |
650 |
p = (char __user *) current->mm->arg_start; |
1da177e4c Linux-2.6.12-rc2 |
651 652 |
for (loop = bprm->argc; loop > 0; loop--) { __put_user((elf_caddr_t) p, argv++); |
b6a2fea39 mm: variable leng... |
653 654 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
655 656 657 658 659 660 661 662 663 664 |
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... |
665 666 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 671 672 673 674 |
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... |
675 |
} |
1da177e4c Linux-2.6.12-rc2 |
676 677 |
/*****************************************************************************/ |
1da177e4c Linux-2.6.12-rc2 |
678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 |
/* * 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... |
714 |
loadmap = kzalloc(size, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
715 716 717 718 |
if (!loadmap) return -ENOMEM; params->loadmap = loadmap; |
1da177e4c Linux-2.6.12-rc2 |
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 |
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... |
748 |
params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) { |
1da177e4c Linux-2.6.12-rc2 |
749 |
params->entry_addr = |
8a2ab7f5d [PATCH] FDPIC: Ad... |
750 751 |
(params->hdr.e_entry - seg->p_vaddr) + seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
752 753 754 755 756 757 |
break; } } } /* determine where the program header table has wound up if mapped */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
758 759 |
stop = params->hdr.e_phoff; stop += params->hdr.e_phnum * sizeof (struct elf_phdr); |
1da177e4c Linux-2.6.12-rc2 |
760 761 762 763 764 765 766 767 768 769 770 771 772 |
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... |
773 774 775 776 777 |
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 |
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 |
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... |
794 795 796 797 798 799 800 801 802 |
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 |
803 804 805 806 807 |
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... |
808 809 |
if (((Elf32_Dyn *) params->dynamic_addr)[tmp - 1].d_tag != 0) |
1da177e4c Linux-2.6.12-rc2 |
810 811 812 813 814 815 816 817 |
goto dynamic_error; break; } } break; } /* now elide adjacent segments in the load map on MMU linux |
8a2ab7f5d [PATCH] FDPIC: Ad... |
818 819 |
* - on uClinux the holes between may actually be filled with system * stuff or stuff from other processes |
1da177e4c Linux-2.6.12-rc2 |
820 821 822 823 824 825 826 827 828 829 |
*/ #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... |
830 831 832 |
mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz); |
1da177e4c Linux-2.6.12-rc2 |
833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 |
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... |
859 |
dynamic_error: |
1da177e4c Linux-2.6.12-rc2 |
860 861 |
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu) ", |
496ad9aa8 new helper: file_... |
862 |
what, file_inode(file)->i_ino); |
1da177e4c Linux-2.6.12-rc2 |
863 |
return -ELIBBAD; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
864 |
} |
1da177e4c Linux-2.6.12-rc2 |
865 866 867 868 869 870 |
/*****************************************************************************/ /* * map a file with constant displacement under uClinux */ #ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
871 872 873 874 |
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 |
875 876 877 878 |
{ struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, base = ULONG_MAX, top = 0, maddr = 0, mflags; |
1da177e4c Linux-2.6.12-rc2 |
879 880 881 882 |
int loop, ret; load_addr = params->load_addr; seg = params->loadmap->segs; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
883 884 |
/* determine the bounds of the contiguous overall allocation we must * make */ |
1da177e4c Linux-2.6.12-rc2 |
885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 |
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 VM: add "vm_mmap(... |
900 |
maddr = vm_mmap(NULL, load_addr, top - base, |
1da177e4c Linux-2.6.12-rc2 |
901 |
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
902 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
903 904 905 906 907 908 909 910 911 912 |
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 Linux-2.6.12-rc2 |
913 914 915 |
seg->addr = maddr + (phdr->p_vaddr - base); seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; |
3dc20cb28 new helper: read_... |
916 917 |
ret = read_code(file, seg->addr, phdr->p_offset, phdr->p_filesz); |
1da177e4c Linux-2.6.12-rc2 |
918 919 920 921 922 923 924 925 |
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... |
926 |
if (phdr->p_filesz < phdr->p_memsz) { |
e30c7c3b3 binfmt_elf_fdpic:... |
927 928 929 |
if (clear_user((void *) (seg->addr + phdr->p_filesz), phdr->p_memsz - phdr->p_filesz)) return -EFAULT; |
ab4ad5551 bin_elf_fdpic: ch... |
930 |
} |
1da177e4c Linux-2.6.12-rc2 |
931 932 933 |
if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
934 935 936 937 938 |
if (!mm->start_code) { mm->start_code = seg->addr; mm->end_code = seg->addr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
939 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
940 |
mm->start_data = seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
941 |
mm->end_data = seg->addr + phdr->p_memsz; |
1da177e4c Linux-2.6.12-rc2 |
942 |
} |
1da177e4c Linux-2.6.12-rc2 |
943 944 945 946 947 948 |
} seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
949 |
} |
1da177e4c Linux-2.6.12-rc2 |
950 951 952 953 954 955 956 957 958 959 960 961 962 |
#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:... |
963 |
int loop, dvset; |
1da177e4c Linux-2.6.12-rc2 |
964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 |
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... |
1010 1011 |
* - can be mapped anywhere, but must be mapped as a * unit |
1da177e4c Linux-2.6.12-rc2 |
1012 1013 1014 1015 1016 |
*/ if (!dvset) { maddr = load_addr; delta_vaddr = phdr->p_vaddr; dvset = 1; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1017 |
} else { |
1da177e4c Linux-2.6.12-rc2 |
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 |
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 VM: add "vm_mmap(... |
1035 |
maddr = vm_mmap(file, maddr, phdr->p_memsz + disp, prot, flags, |
1da177e4c Linux-2.6.12-rc2 |
1036 |
phdr->p_offset - disp); |
1da177e4c Linux-2.6.12-rc2 |
1037 1038 |
kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1039 1040 |
loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp, maddr); |
1da177e4c Linux-2.6.12-rc2 |
1041 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
1042 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
1043 |
return (int) maddr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1044 1045 |
if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS) |
1da177e4c Linux-2.6.12-rc2 |
1046 1047 1048 1049 1050 1051 1052 1053 1054 |
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... |
1055 1056 |
/* clear the bit between beginning of mapping and beginning of * PT_LOAD */ |
1da177e4c Linux-2.6.12-rc2 |
1057 1058 |
if (prot & PROT_WRITE && disp > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp); |
e30c7c3b3 binfmt_elf_fdpic:... |
1059 1060 |
if (clear_user((void __user *) maddr, disp)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 |
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 |
1073 1074 1075 1076 1077 |
if (excess > excess1) { unsigned long xaddr = maddr + phdr->p_filesz + excess1; unsigned long xmaddr; flags |= MAP_FIXED | MAP_ANONYMOUS; |
6be5ceb02 VM: add "vm_mmap(... |
1078 |
xmaddr = vm_mmap(NULL, xaddr, excess - excess1, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1079 |
prot, flags, 0); |
1da177e4c Linux-2.6.12-rc2 |
1080 1081 1082 |
kdebug("mmap[%d] <anon>" " ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1083 1084 |
loop, xaddr, excess - excess1, prot, flags, xmaddr); |
1da177e4c Linux-2.6.12-rc2 |
1085 1086 1087 1088 1089 1090 1091 1092 |
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:... |
1093 1094 1095 |
if (clear_user((void __user *) maddr + phdr->p_filesz, excess1)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1096 1097 1098 1099 1100 1101 |
} #else if (excess > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess); |
e30c7c3b3 binfmt_elf_fdpic:... |
1102 1103 |
if (clear_user((void *) maddr + phdr->p_filesz, excess)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1104 1105 1106 1107 1108 |
} #endif if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
1109 1110 1111 1112 |
if (!mm->start_code) { mm->start_code = maddr; mm->end_code = maddr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1113 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
1114 1115 1116 1117 1118 1119 1120 1121 1122 |
mm->start_data = maddr; mm->end_data = maddr + phdr->p_memsz; } } seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1123 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 |
/*****************************************************************************/ /* * 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... |
1134 |
#ifdef CONFIG_ELF_CORE |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1135 1136 |
/* |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1137 1138 1139 1140 1141 1142 |
* 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:... |
1143 |
static int maydump(struct vm_area_struct *vma, unsigned long mm_flags) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1144 |
{ |
ee78b0a61 coredump masking:... |
1145 |
int dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1146 |
/* Do not dump I/O mapped devices or special mappings */ |
314e51b98 mm: kill vma flag... |
1147 |
if (vma->vm_flags & VM_IO) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 |
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 coredump: add DAX... |
1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 |
/* 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 coredump masking:... |
1172 |
/* By default, dump shared memory if mapped from an anonymous file. */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1173 |
if (vma->vm_flags & VM_SHARED) { |
496ad9aa8 new helper: file_... |
1174 |
if (file_inode(vma->vm_file)->i_nlink == 0) { |
ee78b0a61 coredump masking:... |
1175 1176 1177 1178 |
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... |
1179 |
} |
ee78b0a61 coredump masking:... |
1180 1181 1182 1183 |
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... |
1184 1185 1186 |
} #ifdef CONFIG_MMU |
ee78b0a61 coredump masking:... |
1187 |
/* By default, if it hasn't been written to, don't write it out */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1188 |
if (!vma->anon_vma) { |
ee78b0a61 coredump masking:... |
1189 1190 1191 1192 |
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... |
1193 1194 |
} #endif |
ee78b0a61 coredump masking:... |
1195 1196 1197 1198 |
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... |
1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 |
} /* 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 convert the rest ... |
1222 |
static int writenote(struct memelfnote *men, struct coredump_params *cprm) |
05f47fda9 coredump: unify d... |
1223 1224 |
{ struct elf_note en; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1225 1226 1227 |
en.n_namesz = strlen(men->name) + 1; en.n_descsz = men->datasz; en.n_type = men->type; |
e6c1baa9b convert the rest ... |
1228 |
return dump_emit(cprm, &en, sizeof(en)) && |
22a8cb824 new helper: dump_... |
1229 1230 |
dump_emit(cprm, men->name, en.n_namesz) && dump_align(cprm, 4) && dump_emit(cprm, men->data, men->datasz) && dump_align(cprm, 4); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1231 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1232 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 |
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... |
1283 |
* registers which need to be filled up separately. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1284 1285 1286 1287 1288 1289 1290 |
*/ 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... |
1291 1292 1293 |
rcu_read_lock(); prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1294 |
prstatus->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1295 1296 |
prstatus->pr_pgrp = task_pgrp_vnr(p); prstatus->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1297 |
if (thread_group_leader(p)) { |
2515ddc6d binfmt_elf_fdpic:... |
1298 |
struct task_cputime cputime; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1299 |
/* |
2515ddc6d binfmt_elf_fdpic:... |
1300 1301 |
* This is the record for the group leader. It shows the * group-wide total, not its individual thread total. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1302 |
*/ |
2515ddc6d binfmt_elf_fdpic:... |
1303 1304 1305 |
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... |
1306 |
} else { |
6fac4829c cputime: Use acce... |
1307 1308 1309 1310 1311 |
cputime_t utime, stime; task_cputime(p, &utime, &stime); cputime_to_timeval(utime, &prstatus->pr_utime); cputime_to_timeval(stime, &prstatus->pr_stime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 |
} 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 ... |
1323 |
const struct cred *cred; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 |
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... |
1339 1340 1341 |
rcu_read_lock(); psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1342 |
psinfo->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1343 1344 |
psinfo->pr_pgrp = task_pgrp_vnr(p); psinfo->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1345 1346 1347 1348 1349 1350 1351 |
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 ... |
1352 1353 |
rcu_read_lock(); cred = __task_cred(p); |
ebc887b27 userns: Convert b... |
1354 1355 |
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 CRED: Use RCU to ... |
1356 |
rcu_read_unlock(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 |
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... |
1370 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 |
#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... |
1406 1407 |
fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu), &t->xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1408 1409 1410 1411 1412 1413 |
t->num_notes++; sz += notesize(&t->notes[2]); } #endif return sz; } |
8d9032bbe elf coredump: add... |
1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 |
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... |
1429 1430 1431 |
/* * dump the segments for an MMU process */ |
e6c1baa9b convert the rest ... |
1432 |
static bool elf_fdpic_dump_segments(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1433 1434 1435 1436 1437 |
{ struct vm_area_struct *vma; for (vma = current->mm->mmap; vma; vma = vma->vm_next) { unsigned long addr; |
e6c1baa9b convert the rest ... |
1438 |
if (!maydump(vma, cprm->mm_flags)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1439 |
continue; |
e6c1baa9b convert the rest ... |
1440 |
#ifdef CONFIG_MMU |
f3e8fccd0 mm: add get_dump_... |
1441 1442 |
for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { |
e6c1baa9b convert the rest ... |
1443 |
bool res; |
f3e8fccd0 mm: add get_dump_... |
1444 1445 1446 |
struct page *page = get_dump_page(addr); if (page) { void *kaddr = kmap(page); |
e6c1baa9b convert the rest ... |
1447 |
res = dump_emit(cprm, kaddr, PAGE_SIZE); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1448 |
kunmap(page); |
09cbfeaf1 mm, fs: get rid o... |
1449 |
put_page(page); |
e6c1baa9b convert the rest ... |
1450 |
} else { |
9b56d5438 dump_skip(): dump... |
1451 |
res = dump_skip(cprm, PAGE_SIZE); |
e6c1baa9b convert the rest ... |
1452 1453 1454 |
} if (!res) return false; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1455 |
} |
e6c1baa9b convert the rest ... |
1456 1457 |
#else if (!dump_emit(cprm, (void *) vma->vm_start, |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1458 |
vma->vm_end - vma->vm_start)) |
e6c1baa9b convert the rest ... |
1459 1460 |
return false; #endif |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1461 |
} |
e6c1baa9b convert the rest ... |
1462 |
return true; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1463 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1464 |
|
8d9032bbe elf coredump: add... |
1465 1466 1467 1468 |
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... |
1469 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) |
8d9032bbe elf coredump: add... |
1470 1471 1472 1473 |
if (maydump(vma, mm_flags)) size += vma->vm_end - vma->vm_start; return size; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1474 1475 1476 1477 1478 1479 1480 |
/* * 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... |
1481 |
static int elf_fdpic_core_dump(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1482 1483 1484 1485 1486 |
{ #define NUM_NOTES 6 int has_dumped = 0; mm_segment_t fs; int segs; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1487 1488 1489 |
int i; struct vm_area_struct *vma; struct elfhdr *elf = NULL; |
9b56d5438 dump_skip(): dump... |
1490 |
loff_t offset = 0, dataoff; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1491 1492 1493 1494 |
int numnote; struct memelfnote *notes = NULL; struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1495 1496 1497 1498 1499 1500 1501 |
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... |
1502 |
elf_addr_t *auxv; |
93eb211e6 elf coredump: mak... |
1503 |
struct elf_phdr *phdr4note = NULL; |
8d9032bbe elf coredump: add... |
1504 1505 1506 |
struct elf_shdr *shdr4extnum = NULL; Elf_Half e_phnum; elf_addr_t e_shoff; |
afabada95 elf{,_fdpic} core... |
1507 1508 |
struct core_thread *ct; struct elf_thread_status *tmp; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 |
/* * 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 elf{,_fdpic} core... |
1543 1544 1545 1546 1547 |
for (ct = current->mm->core_state->dumper.next; ct; ct = ct->next) { tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); if (!tmp) goto cleanup; |
182c515fd coredump: elf_fdp... |
1548 |
|
afabada95 elf{,_fdpic} core... |
1549 1550 1551 |
tmp->thread = ct->task; list_add(&tmp->list, &thread_list); } |
182c515fd coredump: elf_fdp... |
1552 |
|
afabada95 elf{,_fdpic} core... |
1553 1554 1555 |
list_for_each(t, &thread_list) { struct elf_thread_status *tmp; int sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1556 |
|
afabada95 elf{,_fdpic} core... |
1557 1558 1559 |
tmp = list_entry(t, struct elf_thread_status, list); sz = elf_dump_thread_status(cprm->siginfo->si_signo, tmp); thread_status_size += sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1560 1561 1562 |
} /* now collect the dump for the current */ |
5ab1c309b coredump: pass si... |
1563 |
fill_prstatus(prstatus, current, cprm->siginfo->si_signo); |
f6151dfea mm: introduce cor... |
1564 |
elf_core_copy_regs(&prstatus->pr_reg, cprm->regs); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1565 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1566 |
segs = current->mm->map_count; |
1fcccbac8 elf coredump: rep... |
1567 |
segs += elf_core_extra_phdrs(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1568 |
|
8d9032bbe elf coredump: add... |
1569 1570 1571 1572 1573 1574 1575 |
/* 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... |
1576 |
/* Set up header */ |
8d9032bbe elf coredump: add... |
1577 |
fill_elf_fdpic_header(elf, e_phnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1578 1579 |
has_dumped = 1; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 |
/* * 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... |
1602 |
elf_core_copy_task_fpregs(current, cprm->regs, fpu))) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1603 1604 1605 1606 1607 |
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... |
1608 |
"LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1609 1610 1611 1612 |
#endif fs = get_fs(); set_fs(KERNEL_DS); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1613 |
offset += sizeof(*elf); /* Elf header */ |
8d9032bbe elf coredump: add... |
1614 |
offset += segs * sizeof(struct elf_phdr); /* Program headers */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1615 1616 1617 |
/* Write notes phdr entry */ { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1618 1619 1620 1621 1622 1623 |
int sz = 0; for (i = 0; i < numnote; i++) sz += notesize(notes + i); sz += thread_status_size; |
93eb211e6 elf coredump: mak... |
1624 1625 |
phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL); if (!phdr4note) |
088e7af73 coredump: move du... |
1626 |
goto end_coredump; |
93eb211e6 elf coredump: mak... |
1627 1628 1629 |
fill_elf_note_phdr(phdr4note, sz, offset); offset += sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1630 1631 1632 1633 |
} /* Page-align dumped data */ dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
30736a4d4 coredump: pass mm... |
1634 |
offset += elf_core_vma_data_size(cprm->mm_flags); |
8d9032bbe elf coredump: add... |
1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 |
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 convert the rest ... |
1646 |
if (!dump_emit(cprm, elf, sizeof(*elf))) |
93eb211e6 elf coredump: mak... |
1647 |
goto end_coredump; |
e6c1baa9b convert the rest ... |
1648 |
if (!dump_emit(cprm, phdr4note, sizeof(*phdr4note))) |
93eb211e6 elf coredump: mak... |
1649 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1650 |
/* write program headers for segments dump */ |
8feae1311 NOMMU: Make VMAs ... |
1651 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1652 1653 |
struct elf_phdr phdr; size_t sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1654 1655 1656 1657 1658 1659 |
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... |
1660 |
phdr.p_filesz = maydump(vma, cprm->mm_flags) ? sz : 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1661 1662 1663 1664 1665 1666 1667 1668 |
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 convert the rest ... |
1669 |
if (!dump_emit(cprm, &phdr, sizeof(phdr))) |
088e7af73 coredump: move du... |
1670 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1671 |
} |
506f21c55 switch elf_core_w... |
1672 |
if (!elf_core_write_extra_phdrs(cprm, offset)) |
1fcccbac8 elf coredump: rep... |
1673 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1674 1675 1676 |
/* write out the notes section */ for (i = 0; i < numnote; i++) |
e6c1baa9b convert the rest ... |
1677 |
if (!writenote(notes + i, cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1678 1679 1680 1681 1682 1683 1684 1685 |
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 convert the rest ... |
1686 |
if (!writenote(&tmp->notes[i], cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1687 1688 |
goto end_coredump; } |
1607f09c2 coredump: fix dum... |
1689 |
if (!dump_skip(cprm, dataoff - cprm->pos)) |
f3e8fccd0 mm: add get_dump_... |
1690 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1691 |
|
e6c1baa9b convert the rest ... |
1692 |
if (!elf_fdpic_dump_segments(cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1693 |
goto end_coredump; |
aa3e7eaf0 switch elf_core_w... |
1694 |
if (!elf_core_write_extra_data(cprm)) |
1fcccbac8 elf coredump: rep... |
1695 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1696 |
|
8d9032bbe elf coredump: add... |
1697 |
if (e_phnum == PN_XNUM) { |
e6c1baa9b convert the rest ... |
1698 |
if (!dump_emit(cprm, shdr4extnum, sizeof(*shdr4extnum))) |
8d9032bbe elf coredump: add... |
1699 1700 |
goto end_coredump; } |
2f48912d1 binfmt_elf_fdpic:... |
1701 |
if (cprm->file->f_pos != offset) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1702 1703 1704 1705 |
/* Sanity check */ printk(KERN_WARNING "elf_core_dump: file->f_pos (%lld) != offset (%lld) ", |
2f48912d1 binfmt_elf_fdpic:... |
1706 |
cprm->file->f_pos, offset); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 |
} 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... |
1718 |
kfree(phdr4note); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1719 1720 1721 1722 1723 |
kfree(elf); kfree(prstatus); kfree(psinfo); kfree(notes); kfree(fpu); |
bcb65a797 FDPIC: Fix memory... |
1724 |
kfree(shdr4extnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1725 1726 1727 1728 1729 1730 |
#ifdef ELF_CORE_COPY_XFPREGS kfree(xfpu); #endif return has_dumped; #undef NUM_NOTES } |
698ba7b5a elf: kill USE_ELF... |
1731 |
#endif /* CONFIG_ELF_CORE */ |