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fs/binfmt_elf_fdpic.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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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 |
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*/ #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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|
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static void __exit exit_elf_fdpic_binfmt(void) { unregister_binfmt(&elf_fdpic_format); } |
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core_initcall(init_elf_fdpic_binfmt); |
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module_exit(exit_elf_fdpic_binfmt); |
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static int is_elf(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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#ifdef ARCH_HAS_SETUP_ADDITIONAL_PAGES retval = arch_setup_additional_pages(bprm, !!interpreter_name); if (retval < 0) goto error; #endif |
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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 |
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finalize_exec(bprm); |
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/* 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); } |
f99d49adf [PATCH] kfree cle... |
452 453 454 455 456 |
kfree(interpreter_name); kfree(exec_params.phdrs); kfree(exec_params.loadmap); kfree(interp_params.phdrs); kfree(interp_params.loadmap); |
1da177e4c Linux-2.6.12-rc2 |
457 |
return retval; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
458 |
} |
1da177e4c Linux-2.6.12-rc2 |
459 460 |
/*****************************************************************************/ |
ec23847d6 binfmt_elf_fdpic:... |
461 462 463 464 465 466 467 468 469 |
#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 |
470 |
/* |
c7637941d binfmt_elf_fdpic:... |
471 472 |
* present useful information to the program by shovelling it onto the new * process's stack |
1da177e4c Linux-2.6.12-rc2 |
473 474 475 476 477 478 |
*/ 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... |
479 |
const struct cred *cred = current_cred(); |
1da177e4c Linux-2.6.12-rc2 |
480 |
unsigned long sp, csp, nitems; |
530018bf3 [PATCH] frv: binf... |
481 |
elf_caddr_t __user *argv, *envp; |
1da177e4c Linux-2.6.12-rc2 |
482 |
size_t platform_len = 0, len; |
ec23847d6 binfmt_elf_fdpic:... |
483 484 |
char *k_platform, *k_base_platform; char __user *u_platform, *u_base_platform, *p; |
1da177e4c Linux-2.6.12-rc2 |
485 |
int loop; |
9b14ec35f binfmt_elf_fdpic:... |
486 |
int nr; /* reset for each csp adjustment */ |
1da177e4c Linux-2.6.12-rc2 |
487 |
|
1da177e4c Linux-2.6.12-rc2 |
488 |
#ifdef CONFIG_MMU |
c7637941d binfmt_elf_fdpic:... |
489 490 491 492 493 494 |
/* 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 |
495 496 497 498 |
#else sp = mm->start_stack; /* stack the program arguments and environment */ |
7e7ec6a93 elf_fdpic_transfe... |
499 |
if (transfer_args_to_stack(bprm, &sp) < 0) |
1da177e4c Linux-2.6.12-rc2 |
500 |
return -EFAULT; |
7e7ec6a93 elf_fdpic_transfe... |
501 |
sp &= ~15; |
1da177e4c Linux-2.6.12-rc2 |
502 |
#endif |
ec23847d6 binfmt_elf_fdpic:... |
503 504 505 506 507 508 |
/* * 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 |
509 |
k_platform = ELF_PLATFORM; |
1aeb21d62 [PATCH] FDPIC: Fi... |
510 |
u_platform = NULL; |
1da177e4c Linux-2.6.12-rc2 |
511 512 513 514 |
if (k_platform) { platform_len = strlen(k_platform) + 1; sp -= platform_len; |
530018bf3 [PATCH] frv: binf... |
515 |
u_platform = (char __user *) sp; |
1da177e4c Linux-2.6.12-rc2 |
516 517 518 |
if (__copy_to_user(u_platform, k_platform, platform_len) != 0) return -EFAULT; } |
ec23847d6 binfmt_elf_fdpic:... |
519 520 521 522 523 524 525 526 527 528 529 530 531 532 |
/* * 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 |
533 534 535 536 537 538 539 |
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... |
540 |
if (copy_to_user((void __user *) sp, exec_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
541 542 543 544 545 546 |
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... |
547 548 |
len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs; |
1da177e4c Linux-2.6.12-rc2 |
549 550 |
sp = (sp - len) & ~7UL; interp_params->map_addr = sp; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
551 552 |
if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
553 554 555 556 557 558 |
return -EFAULT; current->mm->context.interp_fdpic_loadmap = (unsigned long) sp; } /* force 16 byte _final_ alignment here for generality */ |
5edc2a512 binfmt_elf_fdpic:... |
559 |
#define DLINFO_ITEMS 15 |
1da177e4c Linux-2.6.12-rc2 |
560 |
|
ec23847d6 binfmt_elf_fdpic:... |
561 562 |
nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) + (k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH; |
1da177e4c Linux-2.6.12-rc2 |
563 |
|
5edc2a512 binfmt_elf_fdpic:... |
564 565 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) nitems++; |
1da177e4c Linux-2.6.12-rc2 |
566 567 568 569 570 571 572 573 574 575 |
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:... |
576 |
#define NEW_AUX_ENT(id, val) \ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
577 578 579 580 581 582 |
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:... |
583 |
nr++; \ |
1da177e4c Linux-2.6.12-rc2 |
584 |
} while (0) |
9b14ec35f binfmt_elf_fdpic:... |
585 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
586 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
587 |
NEW_AUX_ENT(AT_NULL, 0); |
1da177e4c Linux-2.6.12-rc2 |
588 |
if (k_platform) { |
9b14ec35f binfmt_elf_fdpic:... |
589 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
590 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
591 |
NEW_AUX_ENT(AT_PLATFORM, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
592 |
(elf_addr_t) (unsigned long) u_platform); |
1da177e4c Linux-2.6.12-rc2 |
593 |
} |
ec23847d6 binfmt_elf_fdpic:... |
594 595 596 597 598 599 |
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:... |
600 601 602 603 604 |
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:... |
605 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
606 |
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long); |
2171364d1 powerpc: Add HWCA... |
607 608 609 610 |
NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP); #ifdef ELF_HWCAP2 NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2); #endif |
9b14ec35f binfmt_elf_fdpic:... |
611 612 613 614 615 616 617 618 |
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... |
619 620 621 622 |
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... |
623 |
NEW_AUX_ENT(AT_SECURE, bprm->secureexec); |
5edc2a512 binfmt_elf_fdpic:... |
624 |
NEW_AUX_ENT(AT_EXECFN, bprm->exec); |
1da177e4c Linux-2.6.12-rc2 |
625 626 |
#ifdef ARCH_DLINFO |
9b14ec35f binfmt_elf_fdpic:... |
627 628 |
nr = 0; csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long); |
1da177e4c Linux-2.6.12-rc2 |
629 630 631 632 633 634 635 636 637 |
/* 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... |
638 |
envp = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
639 |
csp -= (bprm->argc + 1) * sizeof(elf_caddr_t); |
530018bf3 [PATCH] frv: binf... |
640 |
argv = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
641 642 643 |
/* stack argc */ csp -= sizeof(unsigned long); |
530018bf3 [PATCH] frv: binf... |
644 |
__put_user(bprm->argc, (unsigned long __user *) csp); |
1da177e4c Linux-2.6.12-rc2 |
645 |
|
88bcd5126 BUG_ON() Conversi... |
646 |
BUG_ON(csp != sp); |
1da177e4c Linux-2.6.12-rc2 |
647 648 649 650 651 |
/* fill in the argv[] array */ #ifdef CONFIG_MMU current->mm->arg_start = bprm->p; #else |
8a2ab7f5d [PATCH] FDPIC: Ad... |
652 653 |
current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p); |
1da177e4c Linux-2.6.12-rc2 |
654 |
#endif |
530018bf3 [PATCH] frv: binf... |
655 |
p = (char __user *) current->mm->arg_start; |
1da177e4c Linux-2.6.12-rc2 |
656 657 |
for (loop = bprm->argc; loop > 0; loop--) { __put_user((elf_caddr_t) p, argv++); |
b6a2fea39 mm: variable leng... |
658 659 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
660 661 662 663 664 665 666 667 668 669 |
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... |
670 671 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
672 673 674 675 676 677 678 679 |
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... |
680 |
} |
1da177e4c Linux-2.6.12-rc2 |
681 682 |
/*****************************************************************************/ |
1da177e4c Linux-2.6.12-rc2 |
683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 |
/* * 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... |
719 |
loadmap = kzalloc(size, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
720 721 722 723 |
if (!loadmap) return -ENOMEM; params->loadmap = loadmap; |
1da177e4c Linux-2.6.12-rc2 |
724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 |
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... |
753 |
params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) { |
1da177e4c Linux-2.6.12-rc2 |
754 |
params->entry_addr = |
8a2ab7f5d [PATCH] FDPIC: Ad... |
755 756 |
(params->hdr.e_entry - seg->p_vaddr) + seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
757 758 759 760 761 762 |
break; } } } /* determine where the program header table has wound up if mapped */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
763 764 |
stop = params->hdr.e_phoff; stop += params->hdr.e_phnum * sizeof (struct elf_phdr); |
1da177e4c Linux-2.6.12-rc2 |
765 766 767 768 769 770 771 772 773 774 775 776 777 |
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... |
778 779 780 781 782 |
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 |
783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 |
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... |
799 800 |
phdr->p_vaddr + phdr->p_memsz <= seg->p_vaddr + seg->p_memsz) { |
cdf38888e binfmt_elf_fdpic:... |
801 802 |
Elf32_Dyn __user *dyn; Elf32_Sword d_tag; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
803 804 805 806 807 808 809 |
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 |
810 811 812 813 814 |
if (phdr->p_memsz == 0 || phdr->p_memsz % sizeof(Elf32_Dyn) != 0) goto dynamic_error; tmp = phdr->p_memsz / sizeof(Elf32_Dyn); |
cdf38888e binfmt_elf_fdpic:... |
815 816 817 |
dyn = (Elf32_Dyn __user *)params->dynamic_addr; __get_user(d_tag, &dyn[tmp - 1].d_tag); if (d_tag != 0) |
1da177e4c Linux-2.6.12-rc2 |
818 819 820 821 822 823 824 825 |
goto dynamic_error; break; } } break; } /* now elide adjacent segments in the load map on MMU linux |
8a2ab7f5d [PATCH] FDPIC: Ad... |
826 827 |
* - on uClinux the holes between may actually be filled with system * stuff or stuff from other processes |
1da177e4c Linux-2.6.12-rc2 |
828 829 830 831 832 833 834 835 836 837 |
*/ #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... |
838 839 840 |
mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz); |
1da177e4c Linux-2.6.12-rc2 |
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 |
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... |
867 |
dynamic_error: |
1da177e4c Linux-2.6.12-rc2 |
868 869 |
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu) ", |
496ad9aa8 new helper: file_... |
870 |
what, file_inode(file)->i_ino); |
1da177e4c Linux-2.6.12-rc2 |
871 |
return -ELIBBAD; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
872 |
} |
1da177e4c Linux-2.6.12-rc2 |
873 874 875 876 877 878 |
/*****************************************************************************/ /* * map a file with constant displacement under uClinux */ #ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
879 880 881 882 |
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 |
883 884 885 886 |
{ 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 |
887 888 889 890 |
int loop, ret; load_addr = params->load_addr; seg = params->loadmap->segs; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
891 892 |
/* determine the bounds of the contiguous overall allocation we must * make */ |
1da177e4c Linux-2.6.12-rc2 |
893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 |
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(... |
908 |
maddr = vm_mmap(NULL, load_addr, top - base, |
1da177e4c Linux-2.6.12-rc2 |
909 |
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
910 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
911 912 913 914 915 916 917 918 919 920 |
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 |
921 922 923 |
seg->addr = maddr + (phdr->p_vaddr - base); seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; |
3dc20cb28 new helper: read_... |
924 925 |
ret = read_code(file, seg->addr, phdr->p_offset, phdr->p_filesz); |
1da177e4c Linux-2.6.12-rc2 |
926 927 928 929 930 931 932 933 |
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... |
934 |
if (phdr->p_filesz < phdr->p_memsz) { |
e30c7c3b3 binfmt_elf_fdpic:... |
935 936 937 |
if (clear_user((void *) (seg->addr + phdr->p_filesz), phdr->p_memsz - phdr->p_filesz)) return -EFAULT; |
ab4ad5551 bin_elf_fdpic: ch... |
938 |
} |
1da177e4c Linux-2.6.12-rc2 |
939 940 941 |
if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
942 943 944 945 946 |
if (!mm->start_code) { mm->start_code = seg->addr; mm->end_code = seg->addr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
947 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
948 |
mm->start_data = seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
949 |
mm->end_data = seg->addr + phdr->p_memsz; |
1da177e4c Linux-2.6.12-rc2 |
950 |
} |
1da177e4c Linux-2.6.12-rc2 |
951 952 953 954 955 956 |
} seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
957 |
} |
1da177e4c Linux-2.6.12-rc2 |
958 959 960 961 962 963 964 965 966 967 968 969 970 |
#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:... |
971 |
int loop, dvset; |
1da177e4c Linux-2.6.12-rc2 |
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 1014 1015 1016 1017 |
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... |
1018 1019 |
* - can be mapped anywhere, but must be mapped as a * unit |
1da177e4c Linux-2.6.12-rc2 |
1020 1021 1022 1023 1024 |
*/ if (!dvset) { maddr = load_addr; delta_vaddr = phdr->p_vaddr; dvset = 1; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1025 |
} else { |
1da177e4c Linux-2.6.12-rc2 |
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 |
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(... |
1043 |
maddr = vm_mmap(file, maddr, phdr->p_memsz + disp, prot, flags, |
1da177e4c Linux-2.6.12-rc2 |
1044 |
phdr->p_offset - disp); |
1da177e4c Linux-2.6.12-rc2 |
1045 1046 |
kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1047 1048 |
loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp, maddr); |
1da177e4c Linux-2.6.12-rc2 |
1049 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
1050 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
1051 |
return (int) maddr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1052 1053 |
if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS) |
1da177e4c Linux-2.6.12-rc2 |
1054 1055 1056 1057 1058 1059 1060 1061 1062 |
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... |
1063 1064 |
/* clear the bit between beginning of mapping and beginning of * PT_LOAD */ |
1da177e4c Linux-2.6.12-rc2 |
1065 1066 |
if (prot & PROT_WRITE && disp > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp); |
e30c7c3b3 binfmt_elf_fdpic:... |
1067 1068 |
if (clear_user((void __user *) maddr, disp)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 |
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 |
1081 1082 1083 1084 1085 |
if (excess > excess1) { unsigned long xaddr = maddr + phdr->p_filesz + excess1; unsigned long xmaddr; flags |= MAP_FIXED | MAP_ANONYMOUS; |
6be5ceb02 VM: add "vm_mmap(... |
1086 |
xmaddr = vm_mmap(NULL, xaddr, excess - excess1, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1087 |
prot, flags, 0); |
1da177e4c Linux-2.6.12-rc2 |
1088 1089 1090 |
kdebug("mmap[%d] <anon>" " ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1091 1092 |
loop, xaddr, excess - excess1, prot, flags, xmaddr); |
1da177e4c Linux-2.6.12-rc2 |
1093 1094 1095 1096 1097 1098 1099 1100 |
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:... |
1101 1102 1103 |
if (clear_user((void __user *) maddr + phdr->p_filesz, excess1)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1104 1105 1106 1107 1108 1109 |
} #else if (excess > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess); |
e30c7c3b3 binfmt_elf_fdpic:... |
1110 1111 |
if (clear_user((void *) maddr + phdr->p_filesz, excess)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1112 1113 1114 1115 1116 |
} #endif if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
1117 1118 1119 1120 |
if (!mm->start_code) { mm->start_code = maddr; mm->end_code = maddr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1121 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
1122 1123 1124 1125 1126 1127 1128 1129 1130 |
mm->start_data = maddr; mm->end_data = maddr + phdr->p_memsz; } } seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1131 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 |
/*****************************************************************************/ /* * 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... |
1142 |
#ifdef CONFIG_ELF_CORE |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1143 1144 |
/* |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1145 1146 1147 1148 1149 1150 |
* 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:... |
1151 |
static int maydump(struct vm_area_struct *vma, unsigned long mm_flags) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1152 |
{ |
ee78b0a61 coredump masking:... |
1153 |
int dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1154 |
/* Do not dump I/O mapped devices or special mappings */ |
314e51b98 mm: kill vma flag... |
1155 |
if (vma->vm_flags & VM_IO) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 |
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... |
1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
/* 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:... |
1180 |
/* By default, dump shared memory if mapped from an anonymous file. */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1181 |
if (vma->vm_flags & VM_SHARED) { |
496ad9aa8 new helper: file_... |
1182 |
if (file_inode(vma->vm_file)->i_nlink == 0) { |
ee78b0a61 coredump masking:... |
1183 1184 1185 1186 |
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... |
1187 |
} |
ee78b0a61 coredump masking:... |
1188 1189 1190 1191 |
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... |
1192 1193 1194 |
} #ifdef CONFIG_MMU |
ee78b0a61 coredump masking:... |
1195 |
/* By default, if it hasn't been written to, don't write it out */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1196 |
if (!vma->anon_vma) { |
ee78b0a61 coredump masking:... |
1197 1198 1199 1200 |
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... |
1201 1202 |
} #endif |
ee78b0a61 coredump masking:... |
1203 1204 1205 1206 |
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... |
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 |
} /* 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 ... |
1230 |
static int writenote(struct memelfnote *men, struct coredump_params *cprm) |
05f47fda9 coredump: unify d... |
1231 1232 |
{ struct elf_note en; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1233 1234 1235 |
en.n_namesz = strlen(men->name) + 1; en.n_descsz = men->datasz; en.n_type = men->type; |
e6c1baa9b convert the rest ... |
1236 |
return dump_emit(cprm, &en, sizeof(en)) && |
22a8cb824 new helper: dump_... |
1237 1238 |
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... |
1239 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1240 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
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 1287 1288 1289 1290 |
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... |
1291 |
* registers which need to be filled up separately. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1292 1293 1294 1295 1296 1297 1298 |
*/ 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... |
1299 1300 1301 |
rcu_read_lock(); prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1302 |
prstatus->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1303 1304 |
prstatus->pr_pgrp = task_pgrp_vnr(p); prstatus->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1305 |
if (thread_group_leader(p)) { |
cd19c364b fs/binfmt: Conver... |
1306 |
struct task_cputime cputime; |
2515ddc6d binfmt_elf_fdpic:... |
1307 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1308 |
/* |
2515ddc6d binfmt_elf_fdpic:... |
1309 1310 |
* This is the record for the group leader. It shows the * group-wide total, not its individual thread total. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1311 |
*/ |
cd19c364b fs/binfmt: Conver... |
1312 1313 1314 |
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... |
1315 |
} else { |
cd19c364b fs/binfmt: Conver... |
1316 |
u64 utime, stime; |
6fac4829c cputime: Use acce... |
1317 |
|
cd19c364b fs/binfmt: Conver... |
1318 1319 1320 |
task_cputime(p, &utime, &stime); prstatus->pr_utime = ns_to_timeval(utime); prstatus->pr_stime = ns_to_timeval(stime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1321 |
} |
5613fda9a sched/cputime: Co... |
1322 1323 |
prstatus->pr_cutime = ns_to_timeval(p->signal->cutime); prstatus->pr_cstime = ns_to_timeval(p->signal->cstime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1324 1325 1326 1327 1328 1329 1330 1331 |
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 ... |
1332 |
const struct cred *cred; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 |
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... |
1348 1349 1350 |
rcu_read_lock(); psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1351 |
psinfo->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1352 1353 |
psinfo->pr_pgrp = task_pgrp_vnr(p); psinfo->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1354 1355 1356 1357 1358 1359 1360 |
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 ... |
1361 1362 |
rcu_read_lock(); cred = __task_cred(p); |
ebc887b27 userns: Convert b... |
1363 1364 |
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 ... |
1365 |
rcu_read_unlock(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 |
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... |
1379 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
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 1411 1412 1413 1414 |
#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... |
1415 1416 |
fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu), &t->xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1417 1418 1419 1420 1421 1422 |
t->num_notes++; sz += notesize(&t->notes[2]); } #endif return sz; } |
8d9032bbe elf coredump: add... |
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 |
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... |
1438 1439 1440 |
/* * dump the segments for an MMU process */ |
e6c1baa9b convert the rest ... |
1441 |
static bool elf_fdpic_dump_segments(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1442 1443 1444 1445 |
{ struct vm_area_struct *vma; for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
11e3e8d6d elf_fdpic: fix un... |
1446 |
#ifdef CONFIG_MMU |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1447 |
unsigned long addr; |
11e3e8d6d elf_fdpic: fix un... |
1448 |
#endif |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1449 |
|
e6c1baa9b convert the rest ... |
1450 |
if (!maydump(vma, cprm->mm_flags)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1451 |
continue; |
e6c1baa9b convert the rest ... |
1452 |
#ifdef CONFIG_MMU |
f3e8fccd0 mm: add get_dump_... |
1453 1454 |
for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { |
e6c1baa9b convert the rest ... |
1455 |
bool res; |
f3e8fccd0 mm: add get_dump_... |
1456 1457 1458 |
struct page *page = get_dump_page(addr); if (page) { void *kaddr = kmap(page); |
e6c1baa9b convert the rest ... |
1459 |
res = dump_emit(cprm, kaddr, PAGE_SIZE); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1460 |
kunmap(page); |
09cbfeaf1 mm, fs: get rid o... |
1461 |
put_page(page); |
e6c1baa9b convert the rest ... |
1462 |
} else { |
9b56d5438 dump_skip(): dump... |
1463 |
res = dump_skip(cprm, PAGE_SIZE); |
e6c1baa9b convert the rest ... |
1464 1465 1466 |
} if (!res) return false; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1467 |
} |
e6c1baa9b convert the rest ... |
1468 1469 |
#else if (!dump_emit(cprm, (void *) vma->vm_start, |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1470 |
vma->vm_end - vma->vm_start)) |
e6c1baa9b convert the rest ... |
1471 1472 |
return false; #endif |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1473 |
} |
e6c1baa9b convert the rest ... |
1474 |
return true; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1475 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1476 |
|
8d9032bbe elf coredump: add... |
1477 1478 1479 1480 |
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... |
1481 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) |
8d9032bbe elf coredump: add... |
1482 1483 1484 1485 |
if (maydump(vma, mm_flags)) size += vma->vm_end - vma->vm_start; return size; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1486 1487 1488 1489 1490 1491 1492 |
/* * 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... |
1493 |
static int elf_fdpic_core_dump(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1494 1495 1496 1497 1498 |
{ #define NUM_NOTES 6 int has_dumped = 0; mm_segment_t fs; int segs; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1499 1500 1501 |
int i; struct vm_area_struct *vma; struct elfhdr *elf = NULL; |
9b56d5438 dump_skip(): dump... |
1502 |
loff_t offset = 0, dataoff; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1503 1504 1505 1506 |
int numnote; struct memelfnote *notes = NULL; struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1507 1508 1509 1510 1511 1512 1513 |
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... |
1514 |
elf_addr_t *auxv; |
93eb211e6 elf coredump: mak... |
1515 |
struct elf_phdr *phdr4note = NULL; |
8d9032bbe elf coredump: add... |
1516 1517 1518 |
struct elf_shdr *shdr4extnum = NULL; Elf_Half e_phnum; elf_addr_t e_shoff; |
afabada95 elf{,_fdpic} core... |
1519 1520 |
struct core_thread *ct; struct elf_thread_status *tmp; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 |
/* * 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; |
6da2ec560 treewide: kmalloc... |
1544 1545 |
notes = kmalloc_array(NUM_NOTES, sizeof(struct memelfnote), GFP_KERNEL); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 |
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... |
1556 1557 1558 1559 1560 |
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... |
1561 |
|
afabada95 elf{,_fdpic} core... |
1562 1563 1564 |
tmp->thread = ct->task; list_add(&tmp->list, &thread_list); } |
182c515fd coredump: elf_fdp... |
1565 |
|
afabada95 elf{,_fdpic} core... |
1566 1567 1568 |
list_for_each(t, &thread_list) { struct elf_thread_status *tmp; int sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1569 |
|
afabada95 elf{,_fdpic} core... |
1570 1571 1572 |
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... |
1573 1574 1575 |
} /* now collect the dump for the current */ |
5ab1c309b coredump: pass si... |
1576 |
fill_prstatus(prstatus, current, cprm->siginfo->si_signo); |
f6151dfea mm: introduce cor... |
1577 |
elf_core_copy_regs(&prstatus->pr_reg, cprm->regs); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1578 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1579 |
segs = current->mm->map_count; |
1fcccbac8 elf coredump: rep... |
1580 |
segs += elf_core_extra_phdrs(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1581 |
|
8d9032bbe elf coredump: add... |
1582 1583 1584 1585 1586 1587 1588 |
/* 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... |
1589 |
/* Set up header */ |
8d9032bbe elf coredump: add... |
1590 |
fill_elf_fdpic_header(elf, e_phnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1591 1592 |
has_dumped = 1; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 |
/* * 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... |
1615 |
elf_core_copy_task_fpregs(current, cprm->regs, fpu))) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1616 1617 1618 1619 1620 |
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... |
1621 |
"LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1622 1623 1624 1625 |
#endif fs = get_fs(); set_fs(KERNEL_DS); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1626 |
offset += sizeof(*elf); /* Elf header */ |
8d9032bbe elf coredump: add... |
1627 |
offset += segs * sizeof(struct elf_phdr); /* Program headers */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1628 1629 1630 |
/* Write notes phdr entry */ { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1631 1632 1633 1634 1635 1636 |
int sz = 0; for (i = 0; i < numnote; i++) sz += notesize(notes + i); sz += thread_status_size; |
93eb211e6 elf coredump: mak... |
1637 1638 |
phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL); if (!phdr4note) |
088e7af73 coredump: move du... |
1639 |
goto end_coredump; |
93eb211e6 elf coredump: mak... |
1640 1641 1642 |
fill_elf_note_phdr(phdr4note, sz, offset); offset += sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1643 1644 1645 1646 |
} /* Page-align dumped data */ dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
30736a4d4 coredump: pass mm... |
1647 |
offset += elf_core_vma_data_size(cprm->mm_flags); |
8d9032bbe elf coredump: add... |
1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 |
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 ... |
1659 |
if (!dump_emit(cprm, elf, sizeof(*elf))) |
93eb211e6 elf coredump: mak... |
1660 |
goto end_coredump; |
e6c1baa9b convert the rest ... |
1661 |
if (!dump_emit(cprm, phdr4note, sizeof(*phdr4note))) |
93eb211e6 elf coredump: mak... |
1662 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1663 |
/* write program headers for segments dump */ |
8feae1311 NOMMU: Make VMAs ... |
1664 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1665 1666 |
struct elf_phdr phdr; size_t sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1667 1668 1669 1670 1671 1672 |
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... |
1673 |
phdr.p_filesz = maydump(vma, cprm->mm_flags) ? sz : 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1674 1675 1676 1677 1678 1679 1680 1681 |
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 ... |
1682 |
if (!dump_emit(cprm, &phdr, sizeof(phdr))) |
088e7af73 coredump: move du... |
1683 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1684 |
} |
506f21c55 switch elf_core_w... |
1685 |
if (!elf_core_write_extra_phdrs(cprm, offset)) |
1fcccbac8 elf coredump: rep... |
1686 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1687 1688 1689 |
/* write out the notes section */ for (i = 0; i < numnote; i++) |
e6c1baa9b convert the rest ... |
1690 |
if (!writenote(notes + i, cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1691 1692 1693 1694 1695 1696 1697 1698 |
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 ... |
1699 |
if (!writenote(&tmp->notes[i], cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1700 1701 |
goto end_coredump; } |
1607f09c2 coredump: fix dum... |
1702 |
if (!dump_skip(cprm, dataoff - cprm->pos)) |
f3e8fccd0 mm: add get_dump_... |
1703 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1704 |
|
e6c1baa9b convert the rest ... |
1705 |
if (!elf_fdpic_dump_segments(cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1706 |
goto end_coredump; |
aa3e7eaf0 switch elf_core_w... |
1707 |
if (!elf_core_write_extra_data(cprm)) |
1fcccbac8 elf coredump: rep... |
1708 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1709 |
|
8d9032bbe elf coredump: add... |
1710 |
if (e_phnum == PN_XNUM) { |
e6c1baa9b convert the rest ... |
1711 |
if (!dump_emit(cprm, shdr4extnum, sizeof(*shdr4extnum))) |
8d9032bbe elf coredump: add... |
1712 1713 |
goto end_coredump; } |
2f48912d1 binfmt_elf_fdpic:... |
1714 |
if (cprm->file->f_pos != offset) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1715 1716 1717 1718 |
/* Sanity check */ printk(KERN_WARNING "elf_core_dump: file->f_pos (%lld) != offset (%lld) ", |
2f48912d1 binfmt_elf_fdpic:... |
1719 |
cprm->file->f_pos, offset); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 |
} 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... |
1731 |
kfree(phdr4note); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1732 1733 1734 1735 1736 |
kfree(elf); kfree(prstatus); kfree(psinfo); kfree(notes); kfree(fpu); |
bcb65a797 FDPIC: Fix memory... |
1737 |
kfree(shdr4extnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1738 1739 1740 1741 1742 1743 |
#ifdef ELF_CORE_COPY_XFPREGS kfree(xfpu); #endif return has_dumped; #undef NUM_NOTES } |
698ba7b5a elf: kill USE_ELF... |
1744 |
#endif /* CONFIG_ELF_CORE */ |