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fs/binfmt_elf_fdpic.c
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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> |
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#include <linux/sched/coredump.h> #include <linux/sched/task_stack.h> |
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#include <linux/sched/cputime.h> |
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#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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|
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#include <linux/uaccess.h> |
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#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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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; |
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loff_t pos = params->hdr.e_phoff; |
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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->phdrs, size, &pos); |
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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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loff_t pos; |
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|
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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; |
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pos = phdr->p_offset; retval = kernel_read(bprm->file, interpreter_name, phdr->p_filesz, &pos); |
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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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pos = 0; retval = kernel_read(interpreter, bprm->buf, BINPRM_BUF_SIZE, &pos); |
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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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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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458 459 |
/*****************************************************************************/ |
ec23847d6 binfmt_elf_fdpic:... |
460 461 462 463 464 465 466 467 468 |
#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 |
1da177e4c Linux-2.6.12-rc2 |
469 |
/* |
c7637941d binfmt_elf_fdpic:... |
470 471 |
* present useful information to the program by shovelling it onto the new * process's stack |
1da177e4c Linux-2.6.12-rc2 |
472 473 474 475 476 477 |
*/ 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... |
478 |
const struct cred *cred = current_cred(); |
1da177e4c Linux-2.6.12-rc2 |
479 |
unsigned long sp, csp, nitems; |
530018bf3 [PATCH] frv: binf... |
480 |
elf_caddr_t __user *argv, *envp; |
1da177e4c Linux-2.6.12-rc2 |
481 |
size_t platform_len = 0, len; |
ec23847d6 binfmt_elf_fdpic:... |
482 483 |
char *k_platform, *k_base_platform; char __user *u_platform, *u_base_platform, *p; |
1da177e4c Linux-2.6.12-rc2 |
484 |
int loop; |
9b14ec35f binfmt_elf_fdpic:... |
485 |
int nr; /* reset for each csp adjustment */ |
1da177e4c Linux-2.6.12-rc2 |
486 |
|
1da177e4c Linux-2.6.12-rc2 |
487 |
#ifdef CONFIG_MMU |
c7637941d binfmt_elf_fdpic:... |
488 489 490 491 492 493 |
/* 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 |
494 495 496 497 |
#else sp = mm->start_stack; /* stack the program arguments and environment */ |
7e7ec6a93 elf_fdpic_transfe... |
498 |
if (transfer_args_to_stack(bprm, &sp) < 0) |
1da177e4c Linux-2.6.12-rc2 |
499 |
return -EFAULT; |
7e7ec6a93 elf_fdpic_transfe... |
500 |
sp &= ~15; |
1da177e4c Linux-2.6.12-rc2 |
501 |
#endif |
ec23847d6 binfmt_elf_fdpic:... |
502 503 504 505 506 507 |
/* * 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 |
508 |
k_platform = ELF_PLATFORM; |
1aeb21d62 [PATCH] FDPIC: Fi... |
509 |
u_platform = NULL; |
1da177e4c Linux-2.6.12-rc2 |
510 511 512 513 |
if (k_platform) { platform_len = strlen(k_platform) + 1; sp -= platform_len; |
530018bf3 [PATCH] frv: binf... |
514 |
u_platform = (char __user *) sp; |
1da177e4c Linux-2.6.12-rc2 |
515 516 517 |
if (__copy_to_user(u_platform, k_platform, platform_len) != 0) return -EFAULT; } |
ec23847d6 binfmt_elf_fdpic:... |
518 519 520 521 522 523 524 525 526 527 528 529 530 531 |
/* * 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 |
532 533 534 535 536 537 538 |
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... |
539 |
if (copy_to_user((void __user *) sp, exec_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
540 541 542 543 544 545 |
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... |
546 547 |
len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs; |
1da177e4c Linux-2.6.12-rc2 |
548 549 |
sp = (sp - len) & ~7UL; interp_params->map_addr = sp; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
550 551 |
if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
552 553 554 555 556 557 |
return -EFAULT; current->mm->context.interp_fdpic_loadmap = (unsigned long) sp; } /* force 16 byte _final_ alignment here for generality */ |
5edc2a512 binfmt_elf_fdpic:... |
558 |
#define DLINFO_ITEMS 15 |
1da177e4c Linux-2.6.12-rc2 |
559 |
|
ec23847d6 binfmt_elf_fdpic:... |
560 561 |
nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) + (k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH; |
1da177e4c Linux-2.6.12-rc2 |
562 |
|
5edc2a512 binfmt_elf_fdpic:... |
563 564 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) nitems++; |
1da177e4c Linux-2.6.12-rc2 |
565 566 567 568 569 570 571 572 573 574 |
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:... |
575 |
#define NEW_AUX_ENT(id, val) \ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
576 577 578 579 580 581 |
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:... |
582 |
nr++; \ |
1da177e4c Linux-2.6.12-rc2 |
583 |
} while (0) |
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_NULL, 0); |
1da177e4c Linux-2.6.12-rc2 |
587 |
if (k_platform) { |
9b14ec35f binfmt_elf_fdpic:... |
588 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
589 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
590 |
NEW_AUX_ENT(AT_PLATFORM, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
591 |
(elf_addr_t) (unsigned long) u_platform); |
1da177e4c Linux-2.6.12-rc2 |
592 |
} |
ec23847d6 binfmt_elf_fdpic:... |
593 594 595 596 597 598 |
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:... |
599 600 601 602 603 |
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:... |
604 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
605 |
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long); |
2171364d1 powerpc: Add HWCA... |
606 607 608 609 |
NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP); #ifdef ELF_HWCAP2 NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2); #endif |
9b14ec35f binfmt_elf_fdpic:... |
610 611 612 613 614 615 616 617 |
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... |
618 619 620 621 |
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)); |
c425e189f binfmt: Introduce... |
622 |
NEW_AUX_ENT(AT_SECURE, bprm->secureexec); |
5edc2a512 binfmt_elf_fdpic:... |
623 |
NEW_AUX_ENT(AT_EXECFN, bprm->exec); |
1da177e4c Linux-2.6.12-rc2 |
624 625 |
#ifdef ARCH_DLINFO |
9b14ec35f binfmt_elf_fdpic:... |
626 627 |
nr = 0; csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long); |
1da177e4c Linux-2.6.12-rc2 |
628 629 630 631 632 633 634 635 636 |
/* 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... |
637 |
envp = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
638 |
csp -= (bprm->argc + 1) * sizeof(elf_caddr_t); |
530018bf3 [PATCH] frv: binf... |
639 |
argv = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
640 641 642 |
/* stack argc */ csp -= sizeof(unsigned long); |
530018bf3 [PATCH] frv: binf... |
643 |
__put_user(bprm->argc, (unsigned long __user *) csp); |
1da177e4c Linux-2.6.12-rc2 |
644 |
|
88bcd5126 BUG_ON() Conversi... |
645 |
BUG_ON(csp != sp); |
1da177e4c Linux-2.6.12-rc2 |
646 647 648 649 650 |
/* fill in the argv[] array */ #ifdef CONFIG_MMU current->mm->arg_start = bprm->p; #else |
8a2ab7f5d [PATCH] FDPIC: Ad... |
651 652 |
current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p); |
1da177e4c Linux-2.6.12-rc2 |
653 |
#endif |
530018bf3 [PATCH] frv: binf... |
654 |
p = (char __user *) current->mm->arg_start; |
1da177e4c Linux-2.6.12-rc2 |
655 656 |
for (loop = bprm->argc; loop > 0; loop--) { __put_user((elf_caddr_t) p, argv++); |
b6a2fea39 mm: variable leng... |
657 658 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
659 660 661 662 663 664 665 666 667 668 |
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... |
669 670 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
671 672 673 674 675 676 677 678 |
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... |
679 |
} |
1da177e4c Linux-2.6.12-rc2 |
680 681 |
/*****************************************************************************/ |
1da177e4c Linux-2.6.12-rc2 |
682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 |
/* * 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... |
718 |
loadmap = kzalloc(size, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
719 720 721 722 |
if (!loadmap) return -ENOMEM; params->loadmap = loadmap; |
1da177e4c Linux-2.6.12-rc2 |
723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 |
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... |
752 |
params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) { |
1da177e4c Linux-2.6.12-rc2 |
753 |
params->entry_addr = |
8a2ab7f5d [PATCH] FDPIC: Ad... |
754 755 |
(params->hdr.e_entry - seg->p_vaddr) + seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
756 757 758 759 760 761 |
break; } } } /* determine where the program header table has wound up if mapped */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
762 763 |
stop = params->hdr.e_phoff; stop += params->hdr.e_phnum * sizeof (struct elf_phdr); |
1da177e4c Linux-2.6.12-rc2 |
764 765 766 767 768 769 770 771 772 773 774 775 776 |
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... |
777 778 779 780 781 |
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 |
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 |
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... |
798 799 800 801 802 803 804 805 806 |
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 |
807 808 809 810 811 |
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... |
812 813 |
if (((Elf32_Dyn *) params->dynamic_addr)[tmp - 1].d_tag != 0) |
1da177e4c Linux-2.6.12-rc2 |
814 815 816 817 818 819 820 821 |
goto dynamic_error; break; } } break; } /* now elide adjacent segments in the load map on MMU linux |
8a2ab7f5d [PATCH] FDPIC: Ad... |
822 823 |
* - on uClinux the holes between may actually be filled with system * stuff or stuff from other processes |
1da177e4c Linux-2.6.12-rc2 |
824 825 826 827 828 829 830 831 832 833 |
*/ #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... |
834 835 836 |
mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz); |
1da177e4c Linux-2.6.12-rc2 |
837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 |
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... |
863 |
dynamic_error: |
1da177e4c Linux-2.6.12-rc2 |
864 865 |
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu) ", |
496ad9aa8 new helper: file_... |
866 |
what, file_inode(file)->i_ino); |
1da177e4c Linux-2.6.12-rc2 |
867 |
return -ELIBBAD; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
868 |
} |
1da177e4c Linux-2.6.12-rc2 |
869 870 871 872 873 874 |
/*****************************************************************************/ /* * map a file with constant displacement under uClinux */ #ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
875 876 877 878 |
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 |
879 880 881 882 |
{ 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 |
883 884 885 886 |
int loop, ret; load_addr = params->load_addr; seg = params->loadmap->segs; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
887 888 |
/* determine the bounds of the contiguous overall allocation we must * make */ |
1da177e4c Linux-2.6.12-rc2 |
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 |
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(... |
904 |
maddr = vm_mmap(NULL, load_addr, top - base, |
1da177e4c Linux-2.6.12-rc2 |
905 |
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
906 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
907 908 909 910 911 912 913 914 915 916 |
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 |
917 918 919 |
seg->addr = maddr + (phdr->p_vaddr - base); seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; |
3dc20cb28 new helper: read_... |
920 921 |
ret = read_code(file, seg->addr, phdr->p_offset, phdr->p_filesz); |
1da177e4c Linux-2.6.12-rc2 |
922 923 924 925 926 927 928 929 |
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... |
930 |
if (phdr->p_filesz < phdr->p_memsz) { |
e30c7c3b3 binfmt_elf_fdpic:... |
931 932 933 |
if (clear_user((void *) (seg->addr + phdr->p_filesz), phdr->p_memsz - phdr->p_filesz)) return -EFAULT; |
ab4ad5551 bin_elf_fdpic: ch... |
934 |
} |
1da177e4c Linux-2.6.12-rc2 |
935 936 937 |
if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
938 939 940 941 942 |
if (!mm->start_code) { mm->start_code = seg->addr; mm->end_code = seg->addr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
943 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
944 |
mm->start_data = seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
945 |
mm->end_data = seg->addr + phdr->p_memsz; |
1da177e4c Linux-2.6.12-rc2 |
946 |
} |
1da177e4c Linux-2.6.12-rc2 |
947 948 949 950 951 952 |
} seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
953 |
} |
1da177e4c Linux-2.6.12-rc2 |
954 955 956 957 958 959 960 961 962 963 964 965 966 |
#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:... |
967 |
int loop, dvset; |
1da177e4c Linux-2.6.12-rc2 |
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 1010 1011 1012 1013 |
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... |
1014 1015 |
* - can be mapped anywhere, but must be mapped as a * unit |
1da177e4c Linux-2.6.12-rc2 |
1016 1017 1018 1019 1020 |
*/ if (!dvset) { maddr = load_addr; delta_vaddr = phdr->p_vaddr; dvset = 1; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1021 |
} else { |
1da177e4c Linux-2.6.12-rc2 |
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 |
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(... |
1039 |
maddr = vm_mmap(file, maddr, phdr->p_memsz + disp, prot, flags, |
1da177e4c Linux-2.6.12-rc2 |
1040 |
phdr->p_offset - disp); |
1da177e4c Linux-2.6.12-rc2 |
1041 1042 |
kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1043 1044 |
loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp, maddr); |
1da177e4c Linux-2.6.12-rc2 |
1045 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
1046 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
1047 |
return (int) maddr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1048 1049 |
if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS) |
1da177e4c Linux-2.6.12-rc2 |
1050 1051 1052 1053 1054 1055 1056 1057 1058 |
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... |
1059 1060 |
/* clear the bit between beginning of mapping and beginning of * PT_LOAD */ |
1da177e4c Linux-2.6.12-rc2 |
1061 1062 |
if (prot & PROT_WRITE && disp > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp); |
e30c7c3b3 binfmt_elf_fdpic:... |
1063 1064 |
if (clear_user((void __user *) maddr, disp)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 |
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 |
1077 1078 1079 1080 1081 |
if (excess > excess1) { unsigned long xaddr = maddr + phdr->p_filesz + excess1; unsigned long xmaddr; flags |= MAP_FIXED | MAP_ANONYMOUS; |
6be5ceb02 VM: add "vm_mmap(... |
1082 |
xmaddr = vm_mmap(NULL, xaddr, excess - excess1, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1083 |
prot, flags, 0); |
1da177e4c Linux-2.6.12-rc2 |
1084 1085 1086 |
kdebug("mmap[%d] <anon>" " ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1087 1088 |
loop, xaddr, excess - excess1, prot, flags, xmaddr); |
1da177e4c Linux-2.6.12-rc2 |
1089 1090 1091 1092 1093 1094 1095 1096 |
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:... |
1097 1098 1099 |
if (clear_user((void __user *) maddr + phdr->p_filesz, excess1)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1100 1101 1102 1103 1104 1105 |
} #else if (excess > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess); |
e30c7c3b3 binfmt_elf_fdpic:... |
1106 1107 |
if (clear_user((void *) maddr + phdr->p_filesz, excess)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1108 1109 1110 1111 1112 |
} #endif if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
1113 1114 1115 1116 |
if (!mm->start_code) { mm->start_code = maddr; mm->end_code = maddr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1117 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
1118 1119 1120 1121 1122 1123 1124 1125 1126 |
mm->start_data = maddr; mm->end_data = maddr + phdr->p_memsz; } } seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1127 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 |
/*****************************************************************************/ /* * 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... |
1138 |
#ifdef CONFIG_ELF_CORE |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1139 1140 |
/* |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1141 1142 1143 1144 1145 1146 |
* 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:... |
1147 |
static int maydump(struct vm_area_struct *vma, unsigned long mm_flags) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1148 |
{ |
ee78b0a61 coredump masking:... |
1149 |
int dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1150 |
/* Do not dump I/O mapped devices or special mappings */ |
314e51b98 mm: kill vma flag... |
1151 |
if (vma->vm_flags & VM_IO) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 |
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... |
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 |
/* 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:... |
1176 |
/* By default, dump shared memory if mapped from an anonymous file. */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1177 |
if (vma->vm_flags & VM_SHARED) { |
496ad9aa8 new helper: file_... |
1178 |
if (file_inode(vma->vm_file)->i_nlink == 0) { |
ee78b0a61 coredump masking:... |
1179 1180 1181 1182 |
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... |
1183 |
} |
ee78b0a61 coredump masking:... |
1184 1185 1186 1187 |
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... |
1188 1189 1190 |
} #ifdef CONFIG_MMU |
ee78b0a61 coredump masking:... |
1191 |
/* By default, if it hasn't been written to, don't write it out */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1192 |
if (!vma->anon_vma) { |
ee78b0a61 coredump masking:... |
1193 1194 1195 1196 |
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... |
1197 1198 |
} #endif |
ee78b0a61 coredump masking:... |
1199 1200 1201 1202 |
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... |
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 |
} /* 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 ... |
1226 |
static int writenote(struct memelfnote *men, struct coredump_params *cprm) |
05f47fda9 coredump: unify d... |
1227 1228 |
{ struct elf_note en; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1229 1230 1231 |
en.n_namesz = strlen(men->name) + 1; en.n_descsz = men->datasz; en.n_type = men->type; |
e6c1baa9b convert the rest ... |
1232 |
return dump_emit(cprm, &en, sizeof(en)) && |
22a8cb824 new helper: dump_... |
1233 1234 |
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... |
1235 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1236 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
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 1283 1284 1285 1286 |
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... |
1287 |
* registers which need to be filled up separately. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1288 1289 1290 1291 1292 1293 1294 |
*/ 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... |
1295 1296 1297 |
rcu_read_lock(); prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1298 |
prstatus->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1299 1300 |
prstatus->pr_pgrp = task_pgrp_vnr(p); prstatus->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1301 |
if (thread_group_leader(p)) { |
cd19c364b fs/binfmt: Conver... |
1302 |
struct task_cputime cputime; |
2515ddc6d binfmt_elf_fdpic:... |
1303 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1304 |
/* |
2515ddc6d binfmt_elf_fdpic:... |
1305 1306 |
* This is the record for the group leader. It shows the * group-wide total, not its individual thread total. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1307 |
*/ |
cd19c364b fs/binfmt: Conver... |
1308 1309 1310 |
thread_group_cputime(p, &cputime); prstatus->pr_utime = ns_to_timeval(cputime.utime); prstatus->pr_stime = ns_to_timeval(cputime.stime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1311 |
} else { |
cd19c364b fs/binfmt: Conver... |
1312 |
u64 utime, stime; |
6fac4829c cputime: Use acce... |
1313 |
|
cd19c364b fs/binfmt: Conver... |
1314 1315 1316 |
task_cputime(p, &utime, &stime); prstatus->pr_utime = ns_to_timeval(utime); prstatus->pr_stime = ns_to_timeval(stime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1317 |
} |
5613fda9a sched/cputime: Co... |
1318 1319 |
prstatus->pr_cutime = ns_to_timeval(p->signal->cutime); prstatus->pr_cstime = ns_to_timeval(p->signal->cstime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1320 1321 1322 1323 1324 1325 1326 1327 |
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 ... |
1328 |
const struct cred *cred; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 |
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... |
1344 1345 1346 |
rcu_read_lock(); psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1347 |
psinfo->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1348 1349 |
psinfo->pr_pgrp = task_pgrp_vnr(p); psinfo->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1350 1351 1352 1353 1354 1355 1356 |
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 ... |
1357 1358 |
rcu_read_lock(); cred = __task_cred(p); |
ebc887b27 userns: Convert b... |
1359 1360 |
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 ... |
1361 |
rcu_read_unlock(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 |
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... |
1375 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
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 1406 1407 1408 1409 1410 |
#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... |
1411 1412 |
fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu), &t->xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1413 1414 1415 1416 1417 1418 |
t->num_notes++; sz += notesize(&t->notes[2]); } #endif return sz; } |
8d9032bbe elf coredump: add... |
1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 |
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... |
1434 1435 1436 |
/* * dump the segments for an MMU process */ |
e6c1baa9b convert the rest ... |
1437 |
static bool elf_fdpic_dump_segments(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1438 1439 1440 1441 1442 |
{ struct vm_area_struct *vma; for (vma = current->mm->mmap; vma; vma = vma->vm_next) { unsigned long addr; |
e6c1baa9b convert the rest ... |
1443 |
if (!maydump(vma, cprm->mm_flags)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1444 |
continue; |
e6c1baa9b convert the rest ... |
1445 |
#ifdef CONFIG_MMU |
f3e8fccd0 mm: add get_dump_... |
1446 1447 |
for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { |
e6c1baa9b convert the rest ... |
1448 |
bool res; |
f3e8fccd0 mm: add get_dump_... |
1449 1450 1451 |
struct page *page = get_dump_page(addr); if (page) { void *kaddr = kmap(page); |
e6c1baa9b convert the rest ... |
1452 |
res = dump_emit(cprm, kaddr, PAGE_SIZE); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1453 |
kunmap(page); |
09cbfeaf1 mm, fs: get rid o... |
1454 |
put_page(page); |
e6c1baa9b convert the rest ... |
1455 |
} else { |
9b56d5438 dump_skip(): dump... |
1456 |
res = dump_skip(cprm, PAGE_SIZE); |
e6c1baa9b convert the rest ... |
1457 1458 1459 |
} if (!res) return false; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1460 |
} |
e6c1baa9b convert the rest ... |
1461 1462 |
#else if (!dump_emit(cprm, (void *) vma->vm_start, |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1463 |
vma->vm_end - vma->vm_start)) |
e6c1baa9b convert the rest ... |
1464 1465 |
return false; #endif |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1466 |
} |
e6c1baa9b convert the rest ... |
1467 |
return true; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1468 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1469 |
|
8d9032bbe elf coredump: add... |
1470 1471 1472 1473 |
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... |
1474 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) |
8d9032bbe elf coredump: add... |
1475 1476 1477 1478 |
if (maydump(vma, mm_flags)) size += vma->vm_end - vma->vm_start; return size; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1479 1480 1481 1482 1483 1484 1485 |
/* * 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... |
1486 |
static int elf_fdpic_core_dump(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1487 1488 1489 1490 1491 |
{ #define NUM_NOTES 6 int has_dumped = 0; mm_segment_t fs; int segs; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1492 1493 1494 |
int i; struct vm_area_struct *vma; struct elfhdr *elf = NULL; |
9b56d5438 dump_skip(): dump... |
1495 |
loff_t offset = 0, dataoff; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1496 1497 1498 1499 |
int numnote; struct memelfnote *notes = NULL; struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1500 1501 1502 1503 1504 1505 1506 |
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... |
1507 |
elf_addr_t *auxv; |
93eb211e6 elf coredump: mak... |
1508 |
struct elf_phdr *phdr4note = NULL; |
8d9032bbe elf coredump: add... |
1509 1510 1511 |
struct elf_shdr *shdr4extnum = NULL; Elf_Half e_phnum; elf_addr_t e_shoff; |
afabada95 elf{,_fdpic} core... |
1512 1513 |
struct core_thread *ct; struct elf_thread_status *tmp; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
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 1543 1544 1545 1546 1547 |
/* * 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... |
1548 1549 1550 1551 1552 |
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... |
1553 |
|
afabada95 elf{,_fdpic} core... |
1554 1555 1556 |
tmp->thread = ct->task; list_add(&tmp->list, &thread_list); } |
182c515fd coredump: elf_fdp... |
1557 |
|
afabada95 elf{,_fdpic} core... |
1558 1559 1560 |
list_for_each(t, &thread_list) { struct elf_thread_status *tmp; int sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1561 |
|
afabada95 elf{,_fdpic} core... |
1562 1563 1564 |
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... |
1565 1566 1567 |
} /* now collect the dump for the current */ |
5ab1c309b coredump: pass si... |
1568 |
fill_prstatus(prstatus, current, cprm->siginfo->si_signo); |
f6151dfea mm: introduce cor... |
1569 |
elf_core_copy_regs(&prstatus->pr_reg, cprm->regs); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1570 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1571 |
segs = current->mm->map_count; |
1fcccbac8 elf coredump: rep... |
1572 |
segs += elf_core_extra_phdrs(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1573 |
|
8d9032bbe elf coredump: add... |
1574 1575 1576 1577 1578 1579 1580 |
/* 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... |
1581 |
/* Set up header */ |
8d9032bbe elf coredump: add... |
1582 |
fill_elf_fdpic_header(elf, e_phnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1583 1584 |
has_dumped = 1; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 |
/* * 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... |
1607 |
elf_core_copy_task_fpregs(current, cprm->regs, fpu))) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1608 1609 1610 1611 1612 |
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... |
1613 |
"LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1614 1615 1616 1617 |
#endif fs = get_fs(); set_fs(KERNEL_DS); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1618 |
offset += sizeof(*elf); /* Elf header */ |
8d9032bbe elf coredump: add... |
1619 |
offset += segs * sizeof(struct elf_phdr); /* Program headers */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1620 1621 1622 |
/* Write notes phdr entry */ { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1623 1624 1625 1626 1627 1628 |
int sz = 0; for (i = 0; i < numnote; i++) sz += notesize(notes + i); sz += thread_status_size; |
93eb211e6 elf coredump: mak... |
1629 1630 |
phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL); if (!phdr4note) |
088e7af73 coredump: move du... |
1631 |
goto end_coredump; |
93eb211e6 elf coredump: mak... |
1632 1633 1634 |
fill_elf_note_phdr(phdr4note, sz, offset); offset += sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1635 1636 1637 1638 |
} /* Page-align dumped data */ dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
30736a4d4 coredump: pass mm... |
1639 |
offset += elf_core_vma_data_size(cprm->mm_flags); |
8d9032bbe elf coredump: add... |
1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 |
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 ... |
1651 |
if (!dump_emit(cprm, elf, sizeof(*elf))) |
93eb211e6 elf coredump: mak... |
1652 |
goto end_coredump; |
e6c1baa9b convert the rest ... |
1653 |
if (!dump_emit(cprm, phdr4note, sizeof(*phdr4note))) |
93eb211e6 elf coredump: mak... |
1654 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1655 |
/* write program headers for segments dump */ |
8feae1311 NOMMU: Make VMAs ... |
1656 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1657 1658 |
struct elf_phdr phdr; size_t sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1659 1660 1661 1662 1663 1664 |
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... |
1665 |
phdr.p_filesz = maydump(vma, cprm->mm_flags) ? sz : 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1666 1667 1668 1669 1670 1671 1672 1673 |
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 ... |
1674 |
if (!dump_emit(cprm, &phdr, sizeof(phdr))) |
088e7af73 coredump: move du... |
1675 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1676 |
} |
506f21c55 switch elf_core_w... |
1677 |
if (!elf_core_write_extra_phdrs(cprm, offset)) |
1fcccbac8 elf coredump: rep... |
1678 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1679 1680 1681 |
/* write out the notes section */ for (i = 0; i < numnote; i++) |
e6c1baa9b convert the rest ... |
1682 |
if (!writenote(notes + i, cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1683 1684 1685 1686 1687 1688 1689 1690 |
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 ... |
1691 |
if (!writenote(&tmp->notes[i], cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1692 1693 |
goto end_coredump; } |
1607f09c2 coredump: fix dum... |
1694 |
if (!dump_skip(cprm, dataoff - cprm->pos)) |
f3e8fccd0 mm: add get_dump_... |
1695 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1696 |
|
e6c1baa9b convert the rest ... |
1697 |
if (!elf_fdpic_dump_segments(cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1698 |
goto end_coredump; |
aa3e7eaf0 switch elf_core_w... |
1699 |
if (!elf_core_write_extra_data(cprm)) |
1fcccbac8 elf coredump: rep... |
1700 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1701 |
|
8d9032bbe elf coredump: add... |
1702 |
if (e_phnum == PN_XNUM) { |
e6c1baa9b convert the rest ... |
1703 |
if (!dump_emit(cprm, shdr4extnum, sizeof(*shdr4extnum))) |
8d9032bbe elf coredump: add... |
1704 1705 |
goto end_coredump; } |
2f48912d1 binfmt_elf_fdpic:... |
1706 |
if (cprm->file->f_pos != offset) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1707 1708 1709 1710 |
/* Sanity check */ printk(KERN_WARNING "elf_core_dump: file->f_pos (%lld) != offset (%lld) ", |
2f48912d1 binfmt_elf_fdpic:... |
1711 |
cprm->file->f_pos, offset); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 |
} 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... |
1723 |
kfree(phdr4note); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1724 1725 1726 1727 1728 |
kfree(elf); kfree(prstatus); kfree(psinfo); kfree(notes); kfree(fpu); |
bcb65a797 FDPIC: Fix memory... |
1729 |
kfree(shdr4extnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1730 1731 1732 1733 1734 1735 |
#ifdef ELF_CORE_COPY_XFPREGS kfree(xfpu); #endif return has_dumped; #undef NUM_NOTES } |
698ba7b5a elf: kill USE_ELF... |
1736 |
#endif /* CONFIG_ELF_CORE */ |