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fs/binfmt_elf.c
60.4 KB
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// SPDX-License-Identifier: GPL-2.0-only |
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/* * linux/fs/binfmt_elf.c * * These are the functions used to load ELF format executables as used * on SVr4 machines. Information on the format may be found in the book * "UNIX SYSTEM V RELEASE 4 Programmers Guide: Ansi C and Programming Support * Tools". * * Copyright 1993, 1994: Eric Youngdale (ericy@cais.com). */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/fs.h> |
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#include <linux/log2.h> |
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#include <linux/mm.h> #include <linux/mman.h> |
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#include <linux/errno.h> #include <linux/signal.h> #include <linux/binfmts.h> #include <linux/string.h> #include <linux/file.h> |
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#include <linux/slab.h> |
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#include <linux/personality.h> #include <linux/elfcore.h> #include <linux/init.h> #include <linux/highuid.h> |
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#include <linux/compiler.h> #include <linux/highmem.h> |
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#include <linux/hugetlb.h> |
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#include <linux/pagemap.h> |
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#include <linux/vmalloc.h> |
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#include <linux/security.h> |
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#include <linux/random.h> |
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#include <linux/elf.h> |
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#include <linux/elf-randomize.h> |
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#include <linux/utsname.h> |
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#include <linux/coredump.h> |
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#include <linux/sched.h> |
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#include <linux/sched/coredump.h> |
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#include <linux/sched/task_stack.h> |
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#include <linux/sched/cputime.h> |
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#include <linux/sizes.h> #include <linux/types.h> |
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#include <linux/cred.h> |
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#include <linux/dax.h> |
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#include <linux/uaccess.h> |
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#include <asm/param.h> #include <asm/page.h> |
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#ifndef ELF_COMPAT #define ELF_COMPAT 0 #endif |
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#ifndef user_long_t #define user_long_t long #endif |
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#ifndef user_siginfo_t #define user_siginfo_t siginfo_t #endif |
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/* That's for binfmt_elf_fdpic to deal with */ #ifndef elf_check_fdpic #define elf_check_fdpic(ex) false #endif |
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static int load_elf_binary(struct linux_binprm *bprm); |
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|
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#ifdef CONFIG_USELIB static int load_elf_library(struct file *); #else #define load_elf_library NULL #endif |
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/* * If we don't support core dumping, then supply a NULL so we * don't even try. */ |
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#ifdef CONFIG_ELF_CORE |
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static int elf_core_dump(struct coredump_params *cprm); |
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#else #define elf_core_dump NULL #endif #if ELF_EXEC_PAGESIZE > PAGE_SIZE |
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#define ELF_MIN_ALIGN ELF_EXEC_PAGESIZE |
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#else |
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#define ELF_MIN_ALIGN PAGE_SIZE |
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#endif #ifndef ELF_CORE_EFLAGS #define ELF_CORE_EFLAGS 0 #endif #define ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(ELF_MIN_ALIGN-1)) #define ELF_PAGEOFFSET(_v) ((_v) & (ELF_MIN_ALIGN-1)) #define ELF_PAGEALIGN(_v) (((_v) + ELF_MIN_ALIGN - 1) & ~(ELF_MIN_ALIGN - 1)) static struct linux_binfmt elf_format = { |
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.module = THIS_MODULE, .load_binary = load_elf_binary, .load_shlib = load_elf_library, .core_dump = elf_core_dump, .min_coredump = ELF_EXEC_PAGESIZE, |
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}; |
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#define BAD_ADDR(x) (unlikely((unsigned long)(x) >= TASK_SIZE)) |
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|
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static int set_brk(unsigned long start, unsigned long end, int prot) |
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{ start = ELF_PAGEALIGN(start); end = ELF_PAGEALIGN(end); if (end > start) { |
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/* * Map the last of the bss segment. * If the header is requesting these pages to be * executable, honour that (ppc32 needs this). */ int error = vm_brk_flags(start, end - start, prot & PROT_EXEC ? VM_EXEC : 0); |
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if (error) return error; |
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} current->mm->start_brk = current->mm->brk = end; return 0; } |
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/* We need to explicitly zero any fractional pages after the data section (i.e. bss). This would contain the junk from the file that should not |
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be in memory */ |
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static int padzero(unsigned long elf_bss) { unsigned long nbyte; nbyte = ELF_PAGEOFFSET(elf_bss); if (nbyte) { nbyte = ELF_MIN_ALIGN - nbyte; if (clear_user((void __user *) elf_bss, nbyte)) return -EFAULT; } return 0; } |
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/* Let's use some macros to make this stack manipulation a little clearer */ |
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#ifdef CONFIG_STACK_GROWSUP #define STACK_ADD(sp, items) ((elf_addr_t __user *)(sp) + (items)) #define STACK_ROUND(sp, items) \ ((15 + (unsigned long) ((sp) + (items))) &~ 15UL) |
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#define STACK_ALLOC(sp, len) ({ \ elf_addr_t __user *old_sp = (elf_addr_t __user *)sp; sp += len; \ old_sp; }) |
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#else #define STACK_ADD(sp, items) ((elf_addr_t __user *)(sp) - (items)) #define STACK_ROUND(sp, items) \ (((unsigned long) (sp - items)) &~ 15UL) #define STACK_ALLOC(sp, len) ({ sp -= len ; sp; }) #endif |
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#ifndef ELF_BASE_PLATFORM /* * AT_BASE_PLATFORM indicates the "real" hardware/microarchitecture. * If the arch defines ELF_BASE_PLATFORM (in asm/elf.h), the value * will be copied to the user stack in the same manner as AT_PLATFORM. */ #define ELF_BASE_PLATFORM NULL #endif |
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static int |
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create_elf_tables(struct linux_binprm *bprm, const struct elfhdr *exec, unsigned long load_addr, unsigned long interp_load_addr, unsigned long e_entry) |
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{ |
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struct mm_struct *mm = current->mm; |
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unsigned long p = bprm->p; int argc = bprm->argc; int envc = bprm->envc; |
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elf_addr_t __user *sp; elf_addr_t __user *u_platform; |
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elf_addr_t __user *u_base_platform; |
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elf_addr_t __user *u_rand_bytes; |
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const char *k_platform = ELF_PLATFORM; |
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const char *k_base_platform = ELF_BASE_PLATFORM; |
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unsigned char k_rand_bytes[16]; |
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int items; elf_addr_t *elf_info; |
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int ei_index; |
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const struct cred *cred = current_cred(); |
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struct vm_area_struct *vma; |
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/* |
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* In some cases (e.g. Hyper-Threading), we want to avoid L1 * evictions by the processes running on the same package. One * thing we can do is to shuffle the initial stack for them. */ p = arch_align_stack(p); /* |
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* If this architecture has a platform capability string, copy it * to userspace. In some cases (Sparc), this info is impossible * for userspace to get any other way, in others (i386) it is * merely difficult. */ |
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u_platform = NULL; if (k_platform) { size_t len = strlen(k_platform) + 1; |
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u_platform = (elf_addr_t __user *)STACK_ALLOC(p, len); |
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if (copy_to_user(u_platform, k_platform, len)) |
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return -EFAULT; } |
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/* * If this architecture has a "base" platform capability * string, copy it to userspace. */ u_base_platform = NULL; if (k_base_platform) { size_t len = strlen(k_base_platform) + 1; u_base_platform = (elf_addr_t __user *)STACK_ALLOC(p, len); |
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if (copy_to_user(u_base_platform, k_base_platform, len)) |
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return -EFAULT; } |
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/* * Generate 16 random bytes for userspace PRNG seeding. */ get_random_bytes(k_rand_bytes, sizeof(k_rand_bytes)); u_rand_bytes = (elf_addr_t __user *) STACK_ALLOC(p, sizeof(k_rand_bytes)); |
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if (copy_to_user(u_rand_bytes, k_rand_bytes, sizeof(k_rand_bytes))) |
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return -EFAULT; |
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/* Create the ELF interpreter info */ |
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elf_info = (elf_addr_t *)mm->saved_auxv; |
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/* update AT_VECTOR_SIZE_BASE if the number of NEW_AUX_ENT() changes */ |
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#define NEW_AUX_ENT(id, val) \ |
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do { \ |
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*elf_info++ = id; \ *elf_info++ = val; \ |
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} while (0) |
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#ifdef ARCH_DLINFO /* * ARCH_DLINFO must come first so PPC can do its special alignment of * AUXV. |
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* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT() in * ARCH_DLINFO changes |
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*/ ARCH_DLINFO; #endif NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP); NEW_AUX_ENT(AT_PAGESZ, ELF_EXEC_PAGESIZE); NEW_AUX_ENT(AT_CLKTCK, CLOCKS_PER_SEC); NEW_AUX_ENT(AT_PHDR, load_addr + exec->e_phoff); |
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NEW_AUX_ENT(AT_PHENT, sizeof(struct elf_phdr)); |
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NEW_AUX_ENT(AT_PHNUM, exec->e_phnum); NEW_AUX_ENT(AT_BASE, interp_load_addr); NEW_AUX_ENT(AT_FLAGS, 0); |
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NEW_AUX_ENT(AT_ENTRY, e_entry); |
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NEW_AUX_ENT(AT_UID, from_kuid_munged(cred->user_ns, cred->uid)); NEW_AUX_ENT(AT_EUID, from_kuid_munged(cred->user_ns, cred->euid)); NEW_AUX_ENT(AT_GID, from_kgid_munged(cred->user_ns, cred->gid)); NEW_AUX_ENT(AT_EGID, from_kgid_munged(cred->user_ns, cred->egid)); |
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NEW_AUX_ENT(AT_SECURE, bprm->secureexec); |
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NEW_AUX_ENT(AT_RANDOM, (elf_addr_t)(unsigned long)u_rand_bytes); |
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#ifdef ELF_HWCAP2 NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2); #endif |
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NEW_AUX_ENT(AT_EXECFN, bprm->exec); |
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if (k_platform) { |
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NEW_AUX_ENT(AT_PLATFORM, |
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(elf_addr_t)(unsigned long)u_platform); |
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} |
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if (k_base_platform) { NEW_AUX_ENT(AT_BASE_PLATFORM, (elf_addr_t)(unsigned long)u_base_platform); } |
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if (bprm->have_execfd) { NEW_AUX_ENT(AT_EXECFD, bprm->execfd); |
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} #undef NEW_AUX_ENT /* AT_NULL is zero; clear the rest too */ |
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memset(elf_info, 0, (char *)mm->saved_auxv + sizeof(mm->saved_auxv) - (char *)elf_info); |
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/* And advance past the AT_NULL entry. */ |
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elf_info += 2; |
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|
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ei_index = elf_info - (elf_addr_t *)mm->saved_auxv; |
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sp = STACK_ADD(p, ei_index); |
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items = (argc + 1) + (envc + 1) + 1; |
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bprm->p = STACK_ROUND(sp, items); /* Point sp at the lowest address on the stack */ #ifdef CONFIG_STACK_GROWSUP sp = (elf_addr_t __user *)bprm->p - items - ei_index; |
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bprm->exec = (unsigned long)sp; /* XXX: PARISC HACK */ |
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#else sp = (elf_addr_t __user *)bprm->p; #endif |
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/* * Grow the stack manually; some architectures have a limit on how * far ahead a user-space access may be in order to grow the stack. */ |
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if (mmap_read_lock_killable(mm)) return -EINTR; |
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vma = find_extend_vma(mm, bprm->p); |
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mmap_read_unlock(mm); |
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if (!vma) return -EFAULT; |
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/* Now, let's put argc (and argv, envp if appropriate) on the stack */ |
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if (put_user(argc, sp++)) |
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return -EFAULT; |
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|
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/* Populate list of argv pointers back to argv strings. */ |
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p = mm->arg_end = mm->arg_start; |
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while (argc-- > 0) { size_t len; |
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if (put_user((elf_addr_t)p, sp++)) |
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return -EFAULT; |
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len = strnlen_user((void __user *)p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
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return -EINVAL; |
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p += len; } |
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if (put_user(0, sp++)) |
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return -EFAULT; |
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mm->arg_end = p; |
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/* Populate list of envp pointers back to envp strings. */ |
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mm->env_end = mm->env_start = p; |
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while (envc-- > 0) { size_t len; |
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if (put_user((elf_addr_t)p, sp++)) |
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return -EFAULT; |
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len = strnlen_user((void __user *)p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
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return -EINVAL; |
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p += len; } |
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if (put_user(0, sp++)) |
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return -EFAULT; |
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mm->env_end = p; |
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/* Put the elf_info on the stack in the right place. */ |
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if (copy_to_user(sp, mm->saved_auxv, ei_index * sizeof(elf_addr_t))) |
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return -EFAULT; return 0; } |
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static unsigned long elf_map(struct file *filep, unsigned long addr, |
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const struct elf_phdr *eppnt, int prot, int type, |
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unsigned long total_size) |
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{ unsigned long map_addr; |
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unsigned long size = eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr); unsigned long off = eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr); addr = ELF_PAGESTART(addr); size = ELF_PAGEALIGN(size); |
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|
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/* mmap() will return -EINVAL if given a zero size, but a * segment with zero filesize is perfectly valid */ |
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if (!size) return addr; |
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/* * total_size is the size of the ELF (interpreter) image. * The _first_ mmap needs to know the full size, otherwise * randomization might put this image into an overlapping * position with the ELF binary image. (since size < total_size) * So we first map the 'big' image - and unmap the remainder at * the end. (which unmap is needed for ELF images with holes.) */ if (total_size) { total_size = ELF_PAGEALIGN(total_size); |
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map_addr = vm_mmap(filep, addr, total_size, prot, type, off); |
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if (!BAD_ADDR(map_addr)) |
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vm_munmap(map_addr+size, total_size-size); |
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} else |
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370 |
map_addr = vm_mmap(filep, addr, size, prot, type, off); |
cc503c1b4 x86: PIE executab... |
371 |
|
d23a61ee9 fs, elf: don't co... |
372 373 374 375 376 |
if ((type & MAP_FIXED_NOREPLACE) && PTR_ERR((void *)map_addr) == -EEXIST) pr_info("%d (%s): Uhuuh, elf segment at %px requested but the memory is mapped already ", task_pid_nr(current), current->comm, (void *)addr); |
4ed286395 fs, elf: drop MAP... |
377 |
|
1da177e4c Linux-2.6.12-rc2 |
378 379 |
return(map_addr); } |
49ac98196 fs/binfmt_elf.c: ... |
380 |
static unsigned long total_mapping_size(const struct elf_phdr *cmds, int nr) |
cc503c1b4 x86: PIE executab... |
381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 |
{ int i, first_idx = -1, last_idx = -1; for (i = 0; i < nr; i++) { if (cmds[i].p_type == PT_LOAD) { last_idx = i; if (first_idx == -1) first_idx = i; } } if (first_idx == -1) return 0; return cmds[last_idx].p_vaddr + cmds[last_idx].p_memsz - ELF_PAGESTART(cmds[first_idx].p_vaddr); } |
658c03356 fs/binfmt_elf.c: ... |
397 398 399 400 401 402 403 404 405 406 |
static int elf_read(struct file *file, void *buf, size_t len, loff_t pos) { ssize_t rv; rv = kernel_read(file, buf, len, &pos); if (unlikely(rv != len)) { return (rv < 0) ? rv : -EIO; } return 0; } |
ce81bb256 fs/binfmt_elf: us... |
407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 |
static unsigned long maximum_alignment(struct elf_phdr *cmds, int nr) { unsigned long alignment = 0; int i; for (i = 0; i < nr; i++) { if (cmds[i].p_type == PT_LOAD) { unsigned long p_align = cmds[i].p_align; /* skip non-power of two alignments as invalid */ if (!is_power_of_2(p_align)) continue; alignment = max(alignment, p_align); } } /* ensure we align to at least one page */ return ELF_PAGEALIGN(alignment); } |
6a8d38945 binfmt_elf: Hoist... |
426 427 428 429 430 431 432 433 434 |
/** * load_elf_phdrs() - load ELF program headers * @elf_ex: ELF header of the binary whose program headers should be loaded * @elf_file: the opened ELF binary file * * Loads ELF program headers from the binary file elf_file, which has the ELF * header pointed to by elf_ex, into a newly allocated array. The caller is * responsible for freeing the allocated data. Returns an ERR_PTR upon failure. */ |
49ac98196 fs/binfmt_elf.c: ... |
435 |
static struct elf_phdr *load_elf_phdrs(const struct elfhdr *elf_ex, |
6a8d38945 binfmt_elf: Hoist... |
436 437 438 |
struct file *elf_file) { struct elf_phdr *elf_phdata = NULL; |
faf1c3152 fs/binfmt_elf.c: ... |
439 |
int retval, err = -1; |
faf1c3152 fs/binfmt_elf.c: ... |
440 |
unsigned int size; |
6a8d38945 binfmt_elf: Hoist... |
441 442 443 444 445 446 447 448 449 |
/* * If the size of this structure has changed, then punt, since * we will be doing the wrong thing. */ if (elf_ex->e_phentsize != sizeof(struct elf_phdr)) goto out; /* Sanity check the number of program headers... */ |
6a8d38945 binfmt_elf: Hoist... |
450 451 |
/* ...and their total size. */ size = sizeof(struct elf_phdr) * elf_ex->e_phnum; |
faf1c3152 fs/binfmt_elf.c: ... |
452 |
if (size == 0 || size > 65536 || size > ELF_MIN_ALIGN) |
6a8d38945 binfmt_elf: Hoist... |
453 454 455 456 457 458 459 |
goto out; elf_phdata = kmalloc(size, GFP_KERNEL); if (!elf_phdata) goto out; /* Read in the program headers */ |
658c03356 fs/binfmt_elf.c: ... |
460 461 462 |
retval = elf_read(elf_file, elf_phdata, size, elf_ex->e_phoff); if (retval < 0) { err = retval; |
6a8d38945 binfmt_elf: Hoist... |
463 464 465 466 467 468 469 470 471 472 473 474 |
goto out; } /* Success! */ err = 0; out: if (err) { kfree(elf_phdata); elf_phdata = NULL; } return elf_phdata; } |
cc503c1b4 x86: PIE executab... |
475 |
|
774c105ed binfmt_elf: allow... |
476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 |
#ifndef CONFIG_ARCH_BINFMT_ELF_STATE /** * struct arch_elf_state - arch-specific ELF loading state * * This structure is used to preserve architecture specific data during * the loading of an ELF file, throughout the checking of architecture * specific ELF headers & through to the point where the ELF load is * known to be proceeding (ie. SET_PERSONALITY). * * This implementation is a dummy for architectures which require no * specific state. */ struct arch_elf_state { }; #define INIT_ARCH_ELF_STATE {} /** * arch_elf_pt_proc() - check a PT_LOPROC..PT_HIPROC ELF program header * @ehdr: The main ELF header * @phdr: The program header to check * @elf: The open ELF file * @is_interp: True if the phdr is from the interpreter of the ELF being * loaded, else false. * @state: Architecture-specific state preserved throughout the process * of loading the ELF. * * Inspects the program header phdr to validate its correctness and/or * suitability for the system. Called once per ELF program header in the * range PT_LOPROC to PT_HIPROC, for both the ELF being loaded and its * interpreter. * * Return: Zero to proceed with the ELF load, non-zero to fail the ELF load * with that return code. */ static inline int arch_elf_pt_proc(struct elfhdr *ehdr, struct elf_phdr *phdr, struct file *elf, bool is_interp, struct arch_elf_state *state) { /* Dummy implementation, always proceed */ return 0; } /** |
54d15714f binfmt_elf: Corre... |
522 |
* arch_check_elf() - check an ELF executable |
774c105ed binfmt_elf: allow... |
523 524 |
* @ehdr: The main ELF header * @has_interp: True if the ELF has an interpreter, else false. |
eb4bc076f ELF: Also pass an... |
525 |
* @interp_ehdr: The interpreter's ELF header |
774c105ed binfmt_elf: allow... |
526 527 528 529 530 531 532 533 534 535 536 |
* @state: Architecture-specific state preserved throughout the process * of loading the ELF. * * Provides a final opportunity for architecture code to reject the loading * of the ELF & cause an exec syscall to return an error. This is called after * all program headers to be checked by arch_elf_pt_proc have been. * * Return: Zero to proceed with the ELF load, non-zero to fail the ELF load * with that return code. */ static inline int arch_check_elf(struct elfhdr *ehdr, bool has_interp, |
eb4bc076f ELF: Also pass an... |
537 |
struct elfhdr *interp_ehdr, |
774c105ed binfmt_elf: allow... |
538 539 540 541 542 543 544 |
struct arch_elf_state *state) { /* Dummy implementation, always proceed */ return 0; } #endif /* !CONFIG_ARCH_BINFMT_ELF_STATE */ |
cc503c1b4 x86: PIE executab... |
545 |
|
fe0f67660 elf: Allow arch t... |
546 547 |
static inline int make_prot(u32 p_flags, struct arch_elf_state *arch_state, bool has_interp, bool is_interp) |
d8e7cb39a fs/binfmt_elf.c: ... |
548 549 550 551 552 553 554 555 556 |
{ int prot = 0; if (p_flags & PF_R) prot |= PROT_READ; if (p_flags & PF_W) prot |= PROT_WRITE; if (p_flags & PF_X) prot |= PROT_EXEC; |
fe0f67660 elf: Allow arch t... |
557 558 |
return arch_elf_adjust_prot(prot, arch_state, has_interp, is_interp); |
d8e7cb39a fs/binfmt_elf.c: ... |
559 |
} |
1da177e4c Linux-2.6.12-rc2 |
560 561 562 563 |
/* This is much more generalized than the library routine read function, so we keep this separate. Technically the library read function is only provided so that we can read a.out libraries that have an ELF header */ |
f4e5cc2c4 [PATCH] binfmt_el... |
564 |
static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex, |
81696d5d5 fs/binfmt_elf.c: ... |
565 |
struct file *interpreter, |
fe0f67660 elf: Allow arch t... |
566 567 |
unsigned long no_base, struct elf_phdr *interp_elf_phdata, struct arch_elf_state *arch_state) |
1da177e4c Linux-2.6.12-rc2 |
568 |
{ |
1da177e4c Linux-2.6.12-rc2 |
569 570 571 572 |
struct elf_phdr *eppnt; unsigned long load_addr = 0; int load_addr_set = 0; unsigned long last_bss = 0, elf_bss = 0; |
16e72e9b3 powerpc: do not m... |
573 |
int bss_prot = 0; |
1da177e4c Linux-2.6.12-rc2 |
574 |
unsigned long error = ~0UL; |
cc503c1b4 x86: PIE executab... |
575 |
unsigned long total_size; |
6a8d38945 binfmt_elf: Hoist... |
576 |
int i; |
1da177e4c Linux-2.6.12-rc2 |
577 578 579 580 581 |
/* First of all, some simple consistency checks */ if (interp_elf_ex->e_type != ET_EXEC && interp_elf_ex->e_type != ET_DYN) goto out; |
4755200b6 binfmt_elf: don't... |
582 583 |
if (!elf_check_arch(interp_elf_ex) || elf_check_fdpic(interp_elf_ex)) |
1da177e4c Linux-2.6.12-rc2 |
584 |
goto out; |
72c2d5319 file->f_op is nev... |
585 |
if (!interpreter->f_op->mmap) |
1da177e4c Linux-2.6.12-rc2 |
586 |
goto out; |
a9d9ef133 binfmt_elf: load ... |
587 588 |
total_size = total_mapping_size(interp_elf_phdata, interp_elf_ex->e_phnum); |
cc503c1b4 x86: PIE executab... |
589 590 |
if (!total_size) { error = -EINVAL; |
a9d9ef133 binfmt_elf: load ... |
591 |
goto out; |
cc503c1b4 x86: PIE executab... |
592 |
} |
a9d9ef133 binfmt_elf: load ... |
593 |
eppnt = interp_elf_phdata; |
f4e5cc2c4 [PATCH] binfmt_el... |
594 595 596 |
for (i = 0; i < interp_elf_ex->e_phnum; i++, eppnt++) { if (eppnt->p_type == PT_LOAD) { int elf_type = MAP_PRIVATE | MAP_DENYWRITE; |
fe0f67660 elf: Allow arch t... |
597 598 |
int elf_prot = make_prot(eppnt->p_flags, arch_state, true, true); |
f4e5cc2c4 [PATCH] binfmt_el... |
599 600 |
unsigned long vaddr = 0; unsigned long k, map_addr; |
f4e5cc2c4 [PATCH] binfmt_el... |
601 602 |
vaddr = eppnt->p_vaddr; if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) |
4ed286395 fs, elf: drop MAP... |
603 |
elf_type |= MAP_FIXED_NOREPLACE; |
cc503c1b4 x86: PIE executab... |
604 605 |
else if (no_base && interp_elf_ex->e_type == ET_DYN) load_addr = -vaddr; |
f4e5cc2c4 [PATCH] binfmt_el... |
606 607 |
map_addr = elf_map(interpreter, load_addr + vaddr, |
bb1ad8205 x86: PIE executab... |
608 |
eppnt, elf_prot, elf_type, total_size); |
cc503c1b4 x86: PIE executab... |
609 |
total_size = 0; |
f4e5cc2c4 [PATCH] binfmt_el... |
610 611 |
error = map_addr; if (BAD_ADDR(map_addr)) |
a9d9ef133 binfmt_elf: load ... |
612 |
goto out; |
f4e5cc2c4 [PATCH] binfmt_el... |
613 614 615 616 617 618 619 620 621 622 623 624 625 |
if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) { load_addr = map_addr - ELF_PAGESTART(vaddr); load_addr_set = 1; } /* * Check to see if the section's size will overflow the * allowed task size. Note that p_filesz must always be * <= p_memsize so it's only necessary to check p_memsz. */ k = load_addr + eppnt->p_vaddr; |
ce51059be [PATCH] binfmt_el... |
626 |
if (BAD_ADDR(k) || |
f4e5cc2c4 [PATCH] binfmt_el... |
627 628 629 630 |
eppnt->p_filesz > eppnt->p_memsz || eppnt->p_memsz > TASK_SIZE || TASK_SIZE - eppnt->p_memsz < k) { error = -ENOMEM; |
a9d9ef133 binfmt_elf: load ... |
631 |
goto out; |
f4e5cc2c4 [PATCH] binfmt_el... |
632 633 634 635 636 637 638 639 640 641 642 643 644 645 |
} /* * Find the end of the file mapping for this phdr, and * keep track of the largest address we see for this. */ k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; if (k > elf_bss) elf_bss = k; /* * Do the same thing for the memory mapping - between * elf_bss and last_bss is the bss section. */ |
0036d1f7e binfmt_elf: fix c... |
646 |
k = load_addr + eppnt->p_vaddr + eppnt->p_memsz; |
16e72e9b3 powerpc: do not m... |
647 |
if (k > last_bss) { |
f4e5cc2c4 [PATCH] binfmt_el... |
648 |
last_bss = k; |
16e72e9b3 powerpc: do not m... |
649 650 |
bss_prot = elf_prot; } |
f4e5cc2c4 [PATCH] binfmt_el... |
651 |
} |
1da177e4c Linux-2.6.12-rc2 |
652 |
} |
0036d1f7e binfmt_elf: fix c... |
653 654 655 656 657 658 659 660 661 662 663 664 |
/* * Now fill out the bss section: first pad the last page from * the file up to the page boundary, and zero it from elf_bss * up to the end of the page. */ if (padzero(elf_bss)) { error = -EFAULT; goto out; } /* * Next, align both the file and mem bss up to the page size, * since this is where elf_bss was just zeroed up to, and where |
16e72e9b3 powerpc: do not m... |
665 |
* last_bss will end after the vm_brk_flags() below. |
0036d1f7e binfmt_elf: fix c... |
666 667 668 669 |
*/ elf_bss = ELF_PAGEALIGN(elf_bss); last_bss = ELF_PAGEALIGN(last_bss); /* Finally, if there is still more bss to allocate, do it. */ |
752015d1b binfmt_elf: fix P... |
670 |
if (last_bss > elf_bss) { |
16e72e9b3 powerpc: do not m... |
671 672 |
error = vm_brk_flags(elf_bss, last_bss - elf_bss, bss_prot & PROT_EXEC ? VM_EXEC : 0); |
5d22fc25d mm: remove more I... |
673 |
if (error) |
a9d9ef133 binfmt_elf: load ... |
674 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
675 |
} |
cc503c1b4 x86: PIE executab... |
676 |
error = load_addr; |
1da177e4c Linux-2.6.12-rc2 |
677 678 679 |
out: return error; } |
1da177e4c Linux-2.6.12-rc2 |
680 681 682 683 |
/* * These are the functions used to load ELF style executables and shared * libraries. There is no binary dependent code anywhere else. */ |
00e19ceec ELF: Add ELF prog... |
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 |
static int parse_elf_property(const char *data, size_t *off, size_t datasz, struct arch_elf_state *arch, bool have_prev_type, u32 *prev_type) { size_t o, step; const struct gnu_property *pr; int ret; if (*off == datasz) return -ENOENT; if (WARN_ON_ONCE(*off > datasz || *off % ELF_GNU_PROPERTY_ALIGN)) return -EIO; o = *off; datasz -= *off; if (datasz < sizeof(*pr)) return -ENOEXEC; pr = (const struct gnu_property *)(data + o); o += sizeof(*pr); datasz -= sizeof(*pr); if (pr->pr_datasz > datasz) return -ENOEXEC; WARN_ON_ONCE(o % ELF_GNU_PROPERTY_ALIGN); step = round_up(pr->pr_datasz, ELF_GNU_PROPERTY_ALIGN); if (step > datasz) return -ENOEXEC; /* Properties are supposed to be unique and sorted on pr_type: */ if (have_prev_type && pr->pr_type <= *prev_type) return -ENOEXEC; *prev_type = pr->pr_type; ret = arch_parse_elf_property(pr->pr_type, data + o, pr->pr_datasz, ELF_COMPAT, arch); if (ret) return ret; *off = o + step; return 0; } #define NOTE_DATA_SZ SZ_1K #define GNU_PROPERTY_TYPE_0_NAME "GNU" #define NOTE_NAME_SZ (sizeof(GNU_PROPERTY_TYPE_0_NAME)) static int parse_elf_properties(struct file *f, const struct elf_phdr *phdr, struct arch_elf_state *arch) { union { struct elf_note nhdr; char data[NOTE_DATA_SZ]; } note; loff_t pos; ssize_t n; size_t off, datasz; int ret; bool have_prev_type; u32 prev_type; if (!IS_ENABLED(CONFIG_ARCH_USE_GNU_PROPERTY) || !phdr) return 0; /* load_elf_binary() shouldn't call us unless this is true... */ if (WARN_ON_ONCE(phdr->p_type != PT_GNU_PROPERTY)) return -ENOEXEC; /* If the properties are crazy large, that's too bad (for now): */ if (phdr->p_filesz > sizeof(note)) return -ENOEXEC; pos = phdr->p_offset; n = kernel_read(f, ¬e, phdr->p_filesz, &pos); BUILD_BUG_ON(sizeof(note) < sizeof(note.nhdr) + NOTE_NAME_SZ); if (n < 0 || n < sizeof(note.nhdr) + NOTE_NAME_SZ) return -EIO; if (note.nhdr.n_type != NT_GNU_PROPERTY_TYPE_0 || note.nhdr.n_namesz != NOTE_NAME_SZ || strncmp(note.data + sizeof(note.nhdr), GNU_PROPERTY_TYPE_0_NAME, n - sizeof(note.nhdr))) return -ENOEXEC; off = round_up(sizeof(note.nhdr) + NOTE_NAME_SZ, ELF_GNU_PROPERTY_ALIGN); if (off > n) return -ENOEXEC; if (note.nhdr.n_descsz > n - off) return -ENOEXEC; datasz = off + note.nhdr.n_descsz; have_prev_type = false; do { ret = parse_elf_property(note.data, &off, datasz, arch, have_prev_type, &prev_type); have_prev_type = true; } while (!ret); return ret == -ENOENT ? 0 : ret; } |
71613c3b8 get rid of pt_reg... |
788 |
static int load_elf_binary(struct linux_binprm *bprm) |
1da177e4c Linux-2.6.12-rc2 |
789 790 791 792 |
{ struct file *interpreter = NULL; /* to shut gcc up */ unsigned long load_addr = 0, load_bias = 0; int load_addr_set = 0; |
1da177e4c Linux-2.6.12-rc2 |
793 |
unsigned long error; |
a9d9ef133 binfmt_elf: load ... |
794 |
struct elf_phdr *elf_ppnt, *elf_phdata, *interp_elf_phdata = NULL; |
00e19ceec ELF: Add ELF prog... |
795 |
struct elf_phdr *elf_property_phdata = NULL; |
1da177e4c Linux-2.6.12-rc2 |
796 |
unsigned long elf_bss, elf_brk; |
16e72e9b3 powerpc: do not m... |
797 |
int bss_prot = 0; |
1da177e4c Linux-2.6.12-rc2 |
798 |
int retval, i; |
cc503c1b4 x86: PIE executab... |
799 |
unsigned long elf_entry; |
a62c5b1b6 fs/binfmt_elf.c: ... |
800 |
unsigned long e_entry; |
cc503c1b4 x86: PIE executab... |
801 |
unsigned long interp_load_addr = 0; |
1da177e4c Linux-2.6.12-rc2 |
802 |
unsigned long start_code, end_code, start_data, end_data; |
1a530a6f2 binfmt_elf: quiet... |
803 |
unsigned long reloc_func_desc __maybe_unused = 0; |
8de61e69c [PATCH] fs: remov... |
804 |
int executable_stack = EXSTACK_DEFAULT; |
a62c5b1b6 fs/binfmt_elf.c: ... |
805 |
struct elfhdr *elf_ex = (struct elfhdr *)bprm->buf; |
0693ffebc fs/binfmt_elf.c: ... |
806 |
struct elfhdr *interp_elf_ex = NULL; |
774c105ed binfmt_elf: allow... |
807 |
struct arch_elf_state arch_state = INIT_ARCH_ELF_STATE; |
03c6d723e fs/binfmt_elf.c: ... |
808 |
struct mm_struct *mm; |
249b08e4e elf: init pt_regs... |
809 |
struct pt_regs *regs; |
1da177e4c Linux-2.6.12-rc2 |
810 |
|
1da177e4c Linux-2.6.12-rc2 |
811 812 |
retval = -ENOEXEC; /* First of all, some simple consistency checks */ |
a62c5b1b6 fs/binfmt_elf.c: ... |
813 |
if (memcmp(elf_ex->e_ident, ELFMAG, SELFMAG) != 0) |
1da177e4c Linux-2.6.12-rc2 |
814 |
goto out; |
a62c5b1b6 fs/binfmt_elf.c: ... |
815 |
if (elf_ex->e_type != ET_EXEC && elf_ex->e_type != ET_DYN) |
1da177e4c Linux-2.6.12-rc2 |
816 |
goto out; |
a62c5b1b6 fs/binfmt_elf.c: ... |
817 |
if (!elf_check_arch(elf_ex)) |
1da177e4c Linux-2.6.12-rc2 |
818 |
goto out; |
a62c5b1b6 fs/binfmt_elf.c: ... |
819 |
if (elf_check_fdpic(elf_ex)) |
4755200b6 binfmt_elf: don't... |
820 |
goto out; |
72c2d5319 file->f_op is nev... |
821 |
if (!bprm->file->f_op->mmap) |
1da177e4c Linux-2.6.12-rc2 |
822 |
goto out; |
a62c5b1b6 fs/binfmt_elf.c: ... |
823 |
elf_phdata = load_elf_phdrs(elf_ex, bprm->file); |
1da177e4c Linux-2.6.12-rc2 |
824 825 |
if (!elf_phdata) goto out; |
1da177e4c Linux-2.6.12-rc2 |
826 |
elf_ppnt = elf_phdata; |
a62c5b1b6 fs/binfmt_elf.c: ... |
827 |
for (i = 0; i < elf_ex->e_phnum; i++, elf_ppnt++) { |
be0deb585 fs/binfmt_elf.c: ... |
828 |
char *elf_interpreter; |
1da177e4c Linux-2.6.12-rc2 |
829 |
|
00e19ceec ELF: Add ELF prog... |
830 831 832 833 |
if (elf_ppnt->p_type == PT_GNU_PROPERTY) { elf_property_phdata = elf_ppnt; continue; } |
be0deb585 fs/binfmt_elf.c: ... |
834 835 |
if (elf_ppnt->p_type != PT_INTERP) continue; |
1fb844961 [PATCH] core-dump... |
836 |
|
be0deb585 fs/binfmt_elf.c: ... |
837 838 839 840 841 842 843 |
/* * This is the program interpreter used for shared libraries - * for now assume that this is an a.out format binary. */ retval = -ENOEXEC; if (elf_ppnt->p_filesz > PATH_MAX || elf_ppnt->p_filesz < 2) goto out_free_ph; |
1da177e4c Linux-2.6.12-rc2 |
844 |
|
be0deb585 fs/binfmt_elf.c: ... |
845 846 847 848 |
retval = -ENOMEM; elf_interpreter = kmalloc(elf_ppnt->p_filesz, GFP_KERNEL); if (!elf_interpreter) goto out_free_ph; |
cc338010a fs/binfmt_elf.c: ... |
849 |
|
658c03356 fs/binfmt_elf.c: ... |
850 851 852 |
retval = elf_read(bprm->file, elf_interpreter, elf_ppnt->p_filesz, elf_ppnt->p_offset); if (retval < 0) |
be0deb585 fs/binfmt_elf.c: ... |
853 |
goto out_free_interp; |
be0deb585 fs/binfmt_elf.c: ... |
854 855 856 857 858 859 860 861 862 |
/* make sure path is NULL terminated */ retval = -ENOEXEC; if (elf_interpreter[elf_ppnt->p_filesz - 1] != '\0') goto out_free_interp; interpreter = open_exec(elf_interpreter); kfree(elf_interpreter); retval = PTR_ERR(interpreter); if (IS_ERR(interpreter)) |
cc338010a fs/binfmt_elf.c: ... |
863 |
goto out_free_ph; |
be0deb585 fs/binfmt_elf.c: ... |
864 865 866 867 868 869 |
/* * If the binary is not readable then enforce mm->dumpable = 0 * regardless of the interpreter's permissions. */ would_dump(bprm, interpreter); |
0693ffebc fs/binfmt_elf.c: ... |
870 871 872 873 874 |
interp_elf_ex = kmalloc(sizeof(*interp_elf_ex), GFP_KERNEL); if (!interp_elf_ex) { retval = -ENOMEM; goto out_free_ph; } |
be0deb585 fs/binfmt_elf.c: ... |
875 |
/* Get the exec headers */ |
c69bcc932 fs/binfmt_elf.c: ... |
876 877 |
retval = elf_read(interpreter, interp_elf_ex, sizeof(*interp_elf_ex), 0); |
658c03356 fs/binfmt_elf.c: ... |
878 |
if (retval < 0) |
be0deb585 fs/binfmt_elf.c: ... |
879 |
goto out_free_dentry; |
be0deb585 fs/binfmt_elf.c: ... |
880 881 882 883 884 885 |
break; out_free_interp: kfree(elf_interpreter); goto out_free_ph; |
1da177e4c Linux-2.6.12-rc2 |
886 887 888 |
} elf_ppnt = elf_phdata; |
a62c5b1b6 fs/binfmt_elf.c: ... |
889 |
for (i = 0; i < elf_ex->e_phnum; i++, elf_ppnt++) |
774c105ed binfmt_elf: allow... |
890 891 |
switch (elf_ppnt->p_type) { case PT_GNU_STACK: |
1da177e4c Linux-2.6.12-rc2 |
892 893 894 895 896 |
if (elf_ppnt->p_flags & PF_X) executable_stack = EXSTACK_ENABLE_X; else executable_stack = EXSTACK_DISABLE_X; break; |
774c105ed binfmt_elf: allow... |
897 898 |
case PT_LOPROC ... PT_HIPROC: |
a62c5b1b6 fs/binfmt_elf.c: ... |
899 |
retval = arch_elf_pt_proc(elf_ex, elf_ppnt, |
774c105ed binfmt_elf: allow... |
900 901 902 903 904 |
bprm->file, false, &arch_state); if (retval) goto out_free_dentry; break; |
1da177e4c Linux-2.6.12-rc2 |
905 |
} |
1da177e4c Linux-2.6.12-rc2 |
906 907 |
/* Some simple consistency checks for the interpreter */ |
cc338010a fs/binfmt_elf.c: ... |
908 |
if (interpreter) { |
1da177e4c Linux-2.6.12-rc2 |
909 |
retval = -ELIBBAD; |
d20894a23 Remove a.out inte... |
910 |
/* Not an ELF interpreter */ |
c69bcc932 fs/binfmt_elf.c: ... |
911 |
if (memcmp(interp_elf_ex->e_ident, ELFMAG, SELFMAG) != 0) |
1da177e4c Linux-2.6.12-rc2 |
912 |
goto out_free_dentry; |
1da177e4c Linux-2.6.12-rc2 |
913 |
/* Verify the interpreter has a valid arch */ |
c69bcc932 fs/binfmt_elf.c: ... |
914 915 |
if (!elf_check_arch(interp_elf_ex) || elf_check_fdpic(interp_elf_ex)) |
1da177e4c Linux-2.6.12-rc2 |
916 |
goto out_free_dentry; |
a9d9ef133 binfmt_elf: load ... |
917 918 |
/* Load the interpreter program headers */ |
c69bcc932 fs/binfmt_elf.c: ... |
919 |
interp_elf_phdata = load_elf_phdrs(interp_elf_ex, |
a9d9ef133 binfmt_elf: load ... |
920 921 922 |
interpreter); if (!interp_elf_phdata) goto out_free_dentry; |
774c105ed binfmt_elf: allow... |
923 924 |
/* Pass PT_LOPROC..PT_HIPROC headers to arch code */ |
00e19ceec ELF: Add ELF prog... |
925 |
elf_property_phdata = NULL; |
774c105ed binfmt_elf: allow... |
926 |
elf_ppnt = interp_elf_phdata; |
c69bcc932 fs/binfmt_elf.c: ... |
927 |
for (i = 0; i < interp_elf_ex->e_phnum; i++, elf_ppnt++) |
774c105ed binfmt_elf: allow... |
928 |
switch (elf_ppnt->p_type) { |
00e19ceec ELF: Add ELF prog... |
929 930 931 |
case PT_GNU_PROPERTY: elf_property_phdata = elf_ppnt; break; |
774c105ed binfmt_elf: allow... |
932 |
case PT_LOPROC ... PT_HIPROC: |
c69bcc932 fs/binfmt_elf.c: ... |
933 |
retval = arch_elf_pt_proc(interp_elf_ex, |
774c105ed binfmt_elf: allow... |
934 935 936 937 938 939 |
elf_ppnt, interpreter, true, &arch_state); if (retval) goto out_free_dentry; break; } |
1da177e4c Linux-2.6.12-rc2 |
940 |
} |
00e19ceec ELF: Add ELF prog... |
941 942 943 944 |
retval = parse_elf_properties(interpreter ?: bprm->file, elf_property_phdata, &arch_state); if (retval) goto out_free_dentry; |
774c105ed binfmt_elf: allow... |
945 946 947 948 949 |
/* * Allow arch code to reject the ELF at this point, whilst it's * still possible to return an error to the code that invoked * the exec syscall. */ |
a62c5b1b6 fs/binfmt_elf.c: ... |
950 |
retval = arch_check_elf(elf_ex, |
c69bcc932 fs/binfmt_elf.c: ... |
951 |
!!interpreter, interp_elf_ex, |
eb4bc076f ELF: Also pass an... |
952 |
&arch_state); |
774c105ed binfmt_elf: allow... |
953 954 |
if (retval) goto out_free_dentry; |
1da177e4c Linux-2.6.12-rc2 |
955 |
/* Flush all traces of the currently running executable */ |
2388777a0 exec: Rename flus... |
956 |
retval = begin_new_exec(bprm); |
1da177e4c Linux-2.6.12-rc2 |
957 958 |
if (retval) goto out_free_dentry; |
1da177e4c Linux-2.6.12-rc2 |
959 960 |
/* Do this immediately, since STACK_TOP as used in setup_arg_pages may depend on the personality. */ |
a62c5b1b6 fs/binfmt_elf.c: ... |
961 962 |
SET_PERSONALITY2(*elf_ex, &arch_state); if (elf_read_implies_exec(*elf_ex, executable_stack)) |
1da177e4c Linux-2.6.12-rc2 |
963 |
current->personality |= READ_IMPLIES_EXEC; |
f4e5cc2c4 [PATCH] binfmt_el... |
964 |
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) |
1da177e4c Linux-2.6.12-rc2 |
965 |
current->flags |= PF_RANDOMIZE; |
221af7f87 Split 'flush_old_... |
966 967 |
setup_new_exec(bprm); |
1da177e4c Linux-2.6.12-rc2 |
968 969 970 |
/* Do this so that we can load the interpreter, if need be. We will change some of these later */ |
1da177e4c Linux-2.6.12-rc2 |
971 972 |
retval = setup_arg_pages(bprm, randomize_stack_top(STACK_TOP), executable_stack); |
19d860a14 handle suicide on... |
973 |
if (retval < 0) |
1da177e4c Linux-2.6.12-rc2 |
974 |
goto out_free_dentry; |
1da177e4c Linux-2.6.12-rc2 |
975 |
|
852643165 fs//binfmt_elf.c:... |
976 977 978 979 980 981 982 |
elf_bss = 0; elf_brk = 0; start_code = ~0UL; end_code = 0; start_data = 0; end_data = 0; |
af901ca18 tree-wide: fix as... |
983 |
/* Now we do a little grungy work by mmapping the ELF image into |
cc503c1b4 x86: PIE executab... |
984 |
the correct location in memory. */ |
f4e5cc2c4 [PATCH] binfmt_el... |
985 |
for(i = 0, elf_ppnt = elf_phdata; |
a62c5b1b6 fs/binfmt_elf.c: ... |
986 |
i < elf_ex->e_phnum; i++, elf_ppnt++) { |
b212921b1 elf: don't use MA... |
987 |
int elf_prot, elf_flags; |
1da177e4c Linux-2.6.12-rc2 |
988 |
unsigned long k, vaddr; |
a87938b2e fs/binfmt_elf.c: ... |
989 |
unsigned long total_size = 0; |
ce81bb256 fs/binfmt_elf: us... |
990 |
unsigned long alignment; |
1da177e4c Linux-2.6.12-rc2 |
991 992 993 994 995 996 997 998 999 1000 |
if (elf_ppnt->p_type != PT_LOAD) continue; if (unlikely (elf_brk > elf_bss)) { unsigned long nbyte; /* There was a PT_LOAD segment with p_memsz > p_filesz before this one. Map anonymous pages, if needed, and clear the area. */ |
f670d0ecd binfmt_elf: cleanups |
1001 |
retval = set_brk(elf_bss + load_bias, |
16e72e9b3 powerpc: do not m... |
1002 1003 |
elf_brk + load_bias, bss_prot); |
19d860a14 handle suicide on... |
1004 |
if (retval) |
1da177e4c Linux-2.6.12-rc2 |
1005 |
goto out_free_dentry; |
1da177e4c Linux-2.6.12-rc2 |
1006 1007 1008 1009 1010 1011 1012 1013 1014 |
nbyte = ELF_PAGEOFFSET(elf_bss); if (nbyte) { nbyte = ELF_MIN_ALIGN - nbyte; if (nbyte > elf_brk - elf_bss) nbyte = elf_brk - elf_bss; if (clear_user((void __user *)elf_bss + load_bias, nbyte)) { /* * This bss-zeroing can fail if the ELF |
f4e5cc2c4 [PATCH] binfmt_el... |
1015 |
* file specifies odd protections. So |
1da177e4c Linux-2.6.12-rc2 |
1016 1017 1018 1019 1020 |
* we don't check the return value */ } } } |
fe0f67660 elf: Allow arch t... |
1021 1022 |
elf_prot = make_prot(elf_ppnt->p_flags, &arch_state, !!interpreter, false); |
1da177e4c Linux-2.6.12-rc2 |
1023 |
|
f4e5cc2c4 [PATCH] binfmt_el... |
1024 |
elf_flags = MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE; |
1da177e4c Linux-2.6.12-rc2 |
1025 1026 |
vaddr = elf_ppnt->p_vaddr; |
eab09532d binfmt_elf: use E... |
1027 1028 1029 1030 |
/* * If we are loading ET_EXEC or we have already performed * the ET_DYN load_addr calculations, proceed normally. */ |
a62c5b1b6 fs/binfmt_elf.c: ... |
1031 |
if (elf_ex->e_type == ET_EXEC || load_addr_set) { |
b212921b1 elf: don't use MA... |
1032 |
elf_flags |= MAP_FIXED; |
a62c5b1b6 fs/binfmt_elf.c: ... |
1033 |
} else if (elf_ex->e_type == ET_DYN) { |
eab09532d binfmt_elf: use E... |
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 |
/* * This logic is run once for the first LOAD Program * Header for ET_DYN binaries to calculate the * randomization (load_bias) for all the LOAD * Program Headers, and to calculate the entire * size of the ELF mapping (total_size). (Note that * load_addr_set is set to true later once the * initial mapping is performed.) * * There are effectively two types of ET_DYN * binaries: programs (i.e. PIE: ET_DYN with INTERP) * and loaders (ET_DYN without INTERP, since they * _are_ the ELF interpreter). The loaders must * be loaded away from programs since the program * may otherwise collide with the loader (especially * for ET_EXEC which does not have a randomized * position). For example to handle invocations of * "./ld.so someprog" to test out a new version of * the loader, the subsequent program that the * loader loads must avoid the loader itself, so * they cannot share the same load range. Sufficient * room for the brk must be allocated with the * loader as well, since brk must be available with * the loader. * * Therefore, programs are loaded offset from * ELF_ET_DYN_BASE and loaders are loaded into the * independently randomized mmap region (0 load_bias * without MAP_FIXED). */ |
cc338010a fs/binfmt_elf.c: ... |
1064 |
if (interpreter) { |
eab09532d binfmt_elf: use E... |
1065 1066 1067 |
load_bias = ELF_ET_DYN_BASE; if (current->flags & PF_RANDOMIZE) load_bias += arch_mmap_rnd(); |
ce81bb256 fs/binfmt_elf: us... |
1068 1069 1070 |
alignment = maximum_alignment(elf_phdata, elf_ex->e_phnum); if (alignment) load_bias &= ~(alignment - 1); |
b212921b1 elf: don't use MA... |
1071 |
elf_flags |= MAP_FIXED; |
eab09532d binfmt_elf: use E... |
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 |
} else load_bias = 0; /* * Since load_bias is used for all subsequent loading * calculations, we must lower it by the first vaddr * so that the remaining calculations based on the * ELF vaddrs will be correctly offset. The result * is then page aligned. */ load_bias = ELF_PAGESTART(load_bias - vaddr); |
a87938b2e fs/binfmt_elf.c: ... |
1083 |
total_size = total_mapping_size(elf_phdata, |
a62c5b1b6 fs/binfmt_elf.c: ... |
1084 |
elf_ex->e_phnum); |
a87938b2e fs/binfmt_elf.c: ... |
1085 |
if (!total_size) { |
2b1d3ae94 fs/binfmt_elf.c:l... |
1086 |
retval = -EINVAL; |
a87938b2e fs/binfmt_elf.c: ... |
1087 1088 |
goto out_free_dentry; } |
1da177e4c Linux-2.6.12-rc2 |
1089 |
} |
f4e5cc2c4 [PATCH] binfmt_el... |
1090 |
error = elf_map(bprm->file, load_bias + vaddr, elf_ppnt, |
a87938b2e fs/binfmt_elf.c: ... |
1091 |
elf_prot, elf_flags, total_size); |
1da177e4c Linux-2.6.12-rc2 |
1092 |
if (BAD_ADDR(error)) { |
b140f2510 Invalid return va... |
1093 1094 |
retval = IS_ERR((void *)error) ? PTR_ERR((void*)error) : -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1095 1096 1097 1098 1099 1100 |
goto out_free_dentry; } if (!load_addr_set) { load_addr_set = 1; load_addr = (elf_ppnt->p_vaddr - elf_ppnt->p_offset); |
a62c5b1b6 fs/binfmt_elf.c: ... |
1101 |
if (elf_ex->e_type == ET_DYN) { |
1da177e4c Linux-2.6.12-rc2 |
1102 1103 1104 1105 1106 1107 1108 |
load_bias += error - ELF_PAGESTART(load_bias + vaddr); load_addr += load_bias; reloc_func_desc = load_bias; } } k = elf_ppnt->p_vaddr; |
f67ef4462 fs/binfmt_elf.c: ... |
1109 |
if ((elf_ppnt->p_flags & PF_X) && k < start_code) |
f4e5cc2c4 [PATCH] binfmt_el... |
1110 1111 1112 |
start_code = k; if (start_data < k) start_data = k; |
1da177e4c Linux-2.6.12-rc2 |
1113 1114 1115 1116 1117 1118 |
/* * Check to see if the section's size will overflow the * allowed task size. Note that p_filesz must always be * <= p_memsz so it is only necessary to check p_memsz. */ |
ce51059be [PATCH] binfmt_el... |
1119 |
if (BAD_ADDR(k) || elf_ppnt->p_filesz > elf_ppnt->p_memsz || |
1da177e4c Linux-2.6.12-rc2 |
1120 1121 |
elf_ppnt->p_memsz > TASK_SIZE || TASK_SIZE - elf_ppnt->p_memsz < k) { |
f4e5cc2c4 [PATCH] binfmt_el... |
1122 |
/* set_brk can never work. Avoid overflows. */ |
b140f2510 Invalid return va... |
1123 |
retval = -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 |
goto out_free_dentry; } k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; if (k > elf_bss) elf_bss = k; if ((elf_ppnt->p_flags & PF_X) && end_code < k) end_code = k; if (end_data < k) end_data = k; k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; |
16e72e9b3 powerpc: do not m... |
1136 1137 |
if (k > elf_brk) { bss_prot = elf_prot; |
1da177e4c Linux-2.6.12-rc2 |
1138 |
elf_brk = k; |
16e72e9b3 powerpc: do not m... |
1139 |
} |
1da177e4c Linux-2.6.12-rc2 |
1140 |
} |
a62c5b1b6 fs/binfmt_elf.c: ... |
1141 |
e_entry = elf_ex->e_entry + load_bias; |
1da177e4c Linux-2.6.12-rc2 |
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 |
elf_bss += load_bias; elf_brk += load_bias; start_code += load_bias; end_code += load_bias; start_data += load_bias; end_data += load_bias; /* Calling set_brk effectively mmaps the pages that we need * for the bss and break sections. We must do this before * mapping in the interpreter, to make sure it doesn't wind * up getting placed where the bss needs to go. */ |
16e72e9b3 powerpc: do not m... |
1154 |
retval = set_brk(elf_bss, elf_brk, bss_prot); |
19d860a14 handle suicide on... |
1155 |
if (retval) |
1da177e4c Linux-2.6.12-rc2 |
1156 |
goto out_free_dentry; |
6de505173 [PATCH] binfmt_el... |
1157 |
if (likely(elf_bss != elf_brk) && unlikely(padzero(elf_bss))) { |
1da177e4c Linux-2.6.12-rc2 |
1158 1159 1160 |
retval = -EFAULT; /* Nobody gets to see this, but.. */ goto out_free_dentry; } |
cc338010a fs/binfmt_elf.c: ... |
1161 |
if (interpreter) { |
c69bcc932 fs/binfmt_elf.c: ... |
1162 |
elf_entry = load_elf_interp(interp_elf_ex, |
d20894a23 Remove a.out inte... |
1163 |
interpreter, |
fe0f67660 elf: Allow arch t... |
1164 1165 |
load_bias, interp_elf_phdata, &arch_state); |
d20894a23 Remove a.out inte... |
1166 1167 1168 1169 1170 1171 |
if (!IS_ERR((void *)elf_entry)) { /* * load_elf_interp() returns relocation * adjustment */ interp_load_addr = elf_entry; |
c69bcc932 fs/binfmt_elf.c: ... |
1172 |
elf_entry += interp_elf_ex->e_entry; |
cc503c1b4 x86: PIE executab... |
1173 |
} |
1da177e4c Linux-2.6.12-rc2 |
1174 |
if (BAD_ADDR(elf_entry)) { |
ce51059be [PATCH] binfmt_el... |
1175 1176 |
retval = IS_ERR((void *)elf_entry) ? (int)elf_entry : -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1177 1178 1179 1180 1181 1182 |
goto out_free_dentry; } reloc_func_desc = interp_load_addr; allow_write_access(interpreter); fput(interpreter); |
0693ffebc fs/binfmt_elf.c: ... |
1183 1184 |
kfree(interp_elf_ex); |
aa0d1564b fs/binfmt_elf.c: ... |
1185 |
kfree(interp_elf_phdata); |
1da177e4c Linux-2.6.12-rc2 |
1186 |
} else { |
a62c5b1b6 fs/binfmt_elf.c: ... |
1187 |
elf_entry = e_entry; |
5342fba54 [PATCH] x86_64: C... |
1188 |
if (BAD_ADDR(elf_entry)) { |
ce51059be [PATCH] binfmt_el... |
1189 |
retval = -EINVAL; |
5342fba54 [PATCH] x86_64: C... |
1190 1191 |
goto out_free_dentry; } |
1da177e4c Linux-2.6.12-rc2 |
1192 1193 1194 |
} kfree(elf_phdata); |
1da177e4c Linux-2.6.12-rc2 |
1195 |
set_binfmt(&elf_format); |
547ee84ce [PATCH] ppc64: Im... |
1196 |
#ifdef ARCH_HAS_SETUP_ADDITIONAL_PAGES |
cc338010a fs/binfmt_elf.c: ... |
1197 |
retval = arch_setup_additional_pages(bprm, !!interpreter); |
19d860a14 handle suicide on... |
1198 |
if (retval < 0) |
18c8baff8 [PATCH] Fix error... |
1199 |
goto out; |
547ee84ce [PATCH] ppc64: Im... |
1200 |
#endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */ |
a62c5b1b6 fs/binfmt_elf.c: ... |
1201 1202 |
retval = create_elf_tables(bprm, elf_ex, load_addr, interp_load_addr, e_entry); |
19d860a14 handle suicide on... |
1203 |
if (retval < 0) |
b6a2fea39 mm: variable leng... |
1204 |
goto out; |
03c6d723e fs/binfmt_elf.c: ... |
1205 1206 1207 1208 1209 1210 1211 |
mm = current->mm; mm->end_code = end_code; mm->start_code = start_code; mm->start_data = start_data; mm->end_data = end_data; mm->start_stack = bprm->p; |
1da177e4c Linux-2.6.12-rc2 |
1212 |
|
4471a675d brk: COMPAT_BRK: ... |
1213 |
if ((current->flags & PF_RANDOMIZE) && (randomize_va_space > 1)) { |
bbdc6076d binfmt_elf: move ... |
1214 1215 1216 1217 1218 1219 1220 |
/* * For architectures with ELF randomization, when executing * a loader directly (i.e. no interpreter listed in ELF * headers), move the brk area out of the mmap region * (since it grows up, and may collide early with the stack * growing down), and into the unused ELF_ET_DYN_BASE region. */ |
7be3cb019 binfmt_elf: Do no... |
1221 |
if (IS_ENABLED(CONFIG_ARCH_HAS_ELF_RANDOMIZE) && |
03c6d723e fs/binfmt_elf.c: ... |
1222 1223 1224 |
elf_ex->e_type == ET_DYN && !interpreter) { mm->brk = mm->start_brk = ELF_ET_DYN_BASE; } |
bbdc6076d binfmt_elf: move ... |
1225 |
|
03c6d723e fs/binfmt_elf.c: ... |
1226 |
mm->brk = mm->start_brk = arch_randomize_brk(mm); |
204db6ed1 mm: fold arch_ran... |
1227 |
#ifdef compat_brk_randomized |
4471a675d brk: COMPAT_BRK: ... |
1228 1229 1230 |
current->brk_randomized = 1; #endif } |
c1d171a00 x86: randomize brk |
1231 |
|
1da177e4c Linux-2.6.12-rc2 |
1232 1233 1234 1235 |
if (current->personality & MMAP_PAGE_ZERO) { /* Why this, you ask??? Well SVr4 maps page 0 as read-only, and some applications "depend" upon this behavior. Since we do not have the power to recompile these, we |
f4e5cc2c4 [PATCH] binfmt_el... |
1236 |
emulate the SVr4 behavior. Sigh. */ |
6be5ceb02 VM: add "vm_mmap(... |
1237 |
error = vm_mmap(NULL, 0, PAGE_SIZE, PROT_READ | PROT_EXEC, |
1da177e4c Linux-2.6.12-rc2 |
1238 |
MAP_FIXED | MAP_PRIVATE, 0); |
1da177e4c Linux-2.6.12-rc2 |
1239 |
} |
249b08e4e elf: init pt_regs... |
1240 |
regs = current_pt_regs(); |
1da177e4c Linux-2.6.12-rc2 |
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 |
#ifdef ELF_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. In addition, it may also specify (eg, PowerPC64 ELF) * that the e_entry field is the address of the function descriptor * for the startup routine, rather than the address of the startup * routine itself. This macro performs whatever initialization to * the regs structure is required as well as any relocations to the * function descriptor entries when executing dynamically links apps. */ ELF_PLAT_INIT(regs, reloc_func_desc); #endif |
b83838313 exec: introduce f... |
1254 |
finalize_exec(bprm); |
1da177e4c Linux-2.6.12-rc2 |
1255 |
start_thread(regs, elf_entry, bprm->p); |
1da177e4c Linux-2.6.12-rc2 |
1256 1257 |
retval = 0; out: |
1da177e4c Linux-2.6.12-rc2 |
1258 1259 1260 1261 |
return retval; /* error cleanup */ out_free_dentry: |
0693ffebc fs/binfmt_elf.c: ... |
1262 |
kfree(interp_elf_ex); |
a9d9ef133 binfmt_elf: load ... |
1263 |
kfree(interp_elf_phdata); |
1da177e4c Linux-2.6.12-rc2 |
1264 1265 1266 |
allow_write_access(interpreter); if (interpreter) fput(interpreter); |
1da177e4c Linux-2.6.12-rc2 |
1267 1268 1269 1270 |
out_free_ph: kfree(elf_phdata); goto out; } |
69369a700 fs, kernel: permi... |
1271 |
#ifdef CONFIG_USELIB |
1da177e4c Linux-2.6.12-rc2 |
1272 1273 |
/* This is really simpleminded and specialized - we are loading an a.out library that is given an ELF header. */ |
1da177e4c Linux-2.6.12-rc2 |
1274 1275 1276 1277 1278 1279 1280 1281 1282 |
static int load_elf_library(struct file *file) { struct elf_phdr *elf_phdata; struct elf_phdr *eppnt; unsigned long elf_bss, bss, len; int retval, error, i, j; struct elfhdr elf_ex; error = -ENOEXEC; |
658c03356 fs/binfmt_elf.c: ... |
1283 1284 |
retval = elf_read(file, &elf_ex, sizeof(elf_ex), 0); if (retval < 0) |
1da177e4c Linux-2.6.12-rc2 |
1285 1286 1287 1288 1289 1290 1291 |
goto out; if (memcmp(elf_ex.e_ident, ELFMAG, SELFMAG) != 0) goto out; /* First of all, some simple consistency checks */ if (elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 || |
72c2d5319 file->f_op is nev... |
1292 |
!elf_check_arch(&elf_ex) || !file->f_op->mmap) |
1da177e4c Linux-2.6.12-rc2 |
1293 |
goto out; |
4755200b6 binfmt_elf: don't... |
1294 1295 |
if (elf_check_fdpic(&elf_ex)) goto out; |
1da177e4c Linux-2.6.12-rc2 |
1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 |
/* Now read in all of the header information */ j = sizeof(struct elf_phdr) * elf_ex.e_phnum; /* j < ELF_MIN_ALIGN because elf_ex.e_phnum <= 2 */ error = -ENOMEM; elf_phdata = kmalloc(j, GFP_KERNEL); if (!elf_phdata) goto out; eppnt = elf_phdata; error = -ENOEXEC; |
658c03356 fs/binfmt_elf.c: ... |
1309 1310 |
retval = elf_read(file, eppnt, j, elf_ex.e_phoff); if (retval < 0) |
1da177e4c Linux-2.6.12-rc2 |
1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 |
goto out_free_ph; for (j = 0, i = 0; i<elf_ex.e_phnum; i++) if ((eppnt + i)->p_type == PT_LOAD) j++; if (j != 1) goto out_free_ph; while (eppnt->p_type != PT_LOAD) eppnt++; /* Now use mmap to map the library into memory. */ |
6be5ceb02 VM: add "vm_mmap(... |
1323 |
error = vm_mmap(file, |
1da177e4c Linux-2.6.12-rc2 |
1324 1325 1326 1327 |
ELF_PAGESTART(eppnt->p_vaddr), (eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr)), PROT_READ | PROT_WRITE | PROT_EXEC, |
4ed286395 fs, elf: drop MAP... |
1328 |
MAP_FIXED_NOREPLACE | MAP_PRIVATE | MAP_DENYWRITE, |
1da177e4c Linux-2.6.12-rc2 |
1329 1330 |
(eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr))); |
1da177e4c Linux-2.6.12-rc2 |
1331 1332 1333 1334 1335 1336 1337 1338 |
if (error != ELF_PAGESTART(eppnt->p_vaddr)) goto out_free_ph; elf_bss = eppnt->p_vaddr + eppnt->p_filesz; if (padzero(elf_bss)) { error = -EFAULT; goto out_free_ph; } |
24962af7e fs, elf: make sur... |
1339 1340 |
len = ELF_PAGEALIGN(eppnt->p_filesz + eppnt->p_vaddr); bss = ELF_PAGEALIGN(eppnt->p_memsz + eppnt->p_vaddr); |
ecc2bc8ac mm, elf: handle v... |
1341 1342 |
if (bss > len) { error = vm_brk(len, bss - len); |
5d22fc25d mm: remove more I... |
1343 |
if (error) |
ecc2bc8ac mm, elf: handle v... |
1344 1345 |
goto out_free_ph; } |
1da177e4c Linux-2.6.12-rc2 |
1346 1347 1348 1349 1350 1351 1352 |
error = 0; out_free_ph: kfree(elf_phdata); out: return error; } |
69369a700 fs, kernel: permi... |
1353 |
#endif /* #ifdef CONFIG_USELIB */ |
1da177e4c Linux-2.6.12-rc2 |
1354 |
|
698ba7b5a elf: kill USE_ELF... |
1355 |
#ifdef CONFIG_ELF_CORE |
1da177e4c Linux-2.6.12-rc2 |
1356 1357 1358 1359 1360 1361 |
/* * ELF core dumper * * Modelled on fs/exec.c:aout_core_dump() * Jeremy Fitzhardinge <jeremy@sw.oz.au> */ |
1da177e4c Linux-2.6.12-rc2 |
1362 |
|
1da177e4c Linux-2.6.12-rc2 |
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 |
/* 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; } |
ecc8c7725 new helper: dump_... |
1382 |
static int writenote(struct memelfnote *men, struct coredump_params *cprm) |
d025c9db7 [PATCH] Support p... |
1383 1384 |
{ struct elf_note en; |
1da177e4c Linux-2.6.12-rc2 |
1385 1386 1387 |
en.n_namesz = strlen(men->name) + 1; en.n_descsz = men->datasz; en.n_type = men->type; |
ecc8c7725 new helper: dump_... |
1388 |
return dump_emit(cprm, &en, sizeof(en)) && |
22a8cb824 new helper: dump_... |
1389 1390 |
dump_emit(cprm, men->name, en.n_namesz) && dump_align(cprm, 4) && dump_emit(cprm, men->data, men->datasz) && dump_align(cprm, 4); |
1da177e4c Linux-2.6.12-rc2 |
1391 |
} |
1da177e4c Linux-2.6.12-rc2 |
1392 |
|
3aba481fc elf core dump: no... |
1393 |
static void fill_elf_header(struct elfhdr *elf, int segs, |
d3330cf08 binfmt_elf: remov... |
1394 |
u16 machine, u32 flags) |
1da177e4c Linux-2.6.12-rc2 |
1395 |
{ |
6970c8eff BINFMT: fill_elf_... |
1396 |
memset(elf, 0, sizeof(*elf)); |
1da177e4c Linux-2.6.12-rc2 |
1397 1398 1399 1400 1401 |
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; |
1da177e4c Linux-2.6.12-rc2 |
1402 1403 |
elf->e_type = ET_CORE; |
3aba481fc elf core dump: no... |
1404 |
elf->e_machine = machine; |
1da177e4c Linux-2.6.12-rc2 |
1405 |
elf->e_version = EV_CURRENT; |
1da177e4c Linux-2.6.12-rc2 |
1406 |
elf->e_phoff = sizeof(struct elfhdr); |
3aba481fc elf core dump: no... |
1407 |
elf->e_flags = flags; |
1da177e4c Linux-2.6.12-rc2 |
1408 1409 1410 |
elf->e_ehsize = sizeof(struct elfhdr); elf->e_phentsize = sizeof(struct elf_phdr); elf->e_phnum = segs; |
1da177e4c Linux-2.6.12-rc2 |
1411 |
} |
8d6b5eeea [PATCH] binfmt_el... |
1412 |
static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset) |
1da177e4c Linux-2.6.12-rc2 |
1413 1414 1415 1416 1417 1418 1419 1420 1421 |
{ 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; |
1da177e4c Linux-2.6.12-rc2 |
1422 1423 1424 1425 1426 1427 1428 1429 1430 |
} static 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; |
1da177e4c Linux-2.6.12-rc2 |
1431 1432 1433 |
} /* |
f4e5cc2c4 [PATCH] binfmt_el... |
1434 1435 |
* fill up all the fields in prstatus from the given task struct, except * registers which need to be filled up separately. |
1da177e4c Linux-2.6.12-rc2 |
1436 1437 |
*/ static void fill_prstatus(struct elf_prstatus *prstatus, |
f4e5cc2c4 [PATCH] binfmt_el... |
1438 |
struct task_struct *p, long signr) |
1da177e4c Linux-2.6.12-rc2 |
1439 1440 1441 1442 |
{ 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... |
1443 1444 1445 |
rcu_read_lock(); prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1446 |
prstatus->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1447 1448 |
prstatus->pr_pgrp = task_pgrp_vnr(p); prstatus->pr_sid = task_session_vnr(p); |
1da177e4c Linux-2.6.12-rc2 |
1449 |
if (thread_group_leader(p)) { |
cd19c364b fs/binfmt: Conver... |
1450 |
struct task_cputime cputime; |
f06febc96 timers: fix itime... |
1451 |
|
1da177e4c Linux-2.6.12-rc2 |
1452 |
/* |
f06febc96 timers: fix itime... |
1453 1454 |
* This is the record for the group leader. It shows the * group-wide total, not its individual thread total. |
1da177e4c Linux-2.6.12-rc2 |
1455 |
*/ |
cd19c364b fs/binfmt: Conver... |
1456 |
thread_group_cputime(p, &cputime); |
e2bb80d55 y2038: elfcore: U... |
1457 1458 |
prstatus->pr_utime = ns_to_kernel_old_timeval(cputime.utime); prstatus->pr_stime = ns_to_kernel_old_timeval(cputime.stime); |
1da177e4c Linux-2.6.12-rc2 |
1459 |
} else { |
cd19c364b fs/binfmt: Conver... |
1460 |
u64 utime, stime; |
6fac4829c cputime: Use acce... |
1461 |
|
cd19c364b fs/binfmt: Conver... |
1462 |
task_cputime(p, &utime, &stime); |
e2bb80d55 y2038: elfcore: U... |
1463 1464 |
prstatus->pr_utime = ns_to_kernel_old_timeval(utime); prstatus->pr_stime = ns_to_kernel_old_timeval(stime); |
1da177e4c Linux-2.6.12-rc2 |
1465 |
} |
5613fda9a sched/cputime: Co... |
1466 |
|
e2bb80d55 y2038: elfcore: U... |
1467 1468 |
prstatus->pr_cutime = ns_to_kernel_old_timeval(p->signal->cutime); prstatus->pr_cstime = ns_to_kernel_old_timeval(p->signal->cstime); |
1da177e4c Linux-2.6.12-rc2 |
1469 1470 1471 1472 1473 |
} static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p, struct mm_struct *mm) { |
c69e8d9c0 CRED: Use RCU to ... |
1474 |
const struct cred *cred; |
a84a50595 [PATCH] fix Linux... |
1475 |
unsigned int i, len; |
1da177e4c Linux-2.6.12-rc2 |
1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 |
/* 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... |
1490 1491 1492 |
rcu_read_lock(); psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1493 |
psinfo->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1494 1495 |
psinfo->pr_pgrp = task_pgrp_vnr(p); psinfo->pr_sid = task_session_vnr(p); |
1da177e4c Linux-2.6.12-rc2 |
1496 1497 1498 |
i = p->state ? ffz(~p->state) + 1 : 0; psinfo->pr_state = i; |
551485481 [PATCH] remove ne... |
1499 |
psinfo->pr_sname = (i > 5) ? '.' : "RSDTZW"[i]; |
1da177e4c Linux-2.6.12-rc2 |
1500 1501 1502 |
psinfo->pr_zomb = psinfo->pr_sname == 'Z'; psinfo->pr_nice = task_nice(p); psinfo->pr_flag = p->flags; |
c69e8d9c0 CRED: Use RCU to ... |
1503 1504 |
rcu_read_lock(); cred = __task_cred(p); |
ebc887b27 userns: Convert b... |
1505 1506 |
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 ... |
1507 |
rcu_read_unlock(); |
1da177e4c Linux-2.6.12-rc2 |
1508 1509 1510 1511 |
strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname)); return 0; } |
3aba481fc elf core dump: no... |
1512 1513 1514 1515 1516 1517 1518 1519 1520 |
static void fill_auxv_note(struct memelfnote *note, struct mm_struct *mm) { elf_addr_t *auxv = (elf_addr_t *) mm->saved_auxv; int i = 0; do i += 2; while (auxv[i - 2] != AT_NULL); fill_note(note, "CORE", NT_AUXV, i * sizeof(elf_addr_t), auxv); } |
49ae4d4b1 coredump: add a n... |
1521 |
static void fill_siginfo_note(struct memelfnote *note, user_siginfo_t *csigdata, |
ae7795bc6 signal: Distingui... |
1522 |
const kernel_siginfo_t *siginfo) |
49ae4d4b1 coredump: add a n... |
1523 |
{ |
fa4751f45 binfmt_elf: remov... |
1524 |
copy_siginfo_to_external(csigdata, siginfo); |
49ae4d4b1 coredump: add a n... |
1525 1526 |
fill_note(note, "CORE", NT_SIGINFO, sizeof(*csigdata), csigdata); } |
2aa362c49 coredump: extend ... |
1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 |
#define MAX_FILE_NOTE_SIZE (4*1024*1024) /* * Format of NT_FILE note: * * long count -- how many files are mapped * long page_size -- units for file_ofs * array of [COUNT] elements of * long start * long end * long file_ofs * followed by COUNT filenames in ASCII: "FILE1" NUL "FILE2" NUL... */ |
720236569 fs/binfmt_elf.c: ... |
1539 |
static int fill_files_note(struct memelfnote *note) |
2aa362c49 coredump: extend ... |
1540 |
{ |
03c6d723e fs/binfmt_elf.c: ... |
1541 |
struct mm_struct *mm = current->mm; |
2aa362c49 coredump: extend ... |
1542 1543 1544 1545 1546 1547 1548 |
struct vm_area_struct *vma; unsigned count, size, names_ofs, remaining, n; user_long_t *data; user_long_t *start_end_ofs; char *name_base, *name_curpos; /* *Estimated* file count and total data size needed */ |
03c6d723e fs/binfmt_elf.c: ... |
1549 |
count = mm->map_count; |
60c9d92f8 elf: fix NT_FILE ... |
1550 1551 |
if (count > UINT_MAX / 64) return -EINVAL; |
2aa362c49 coredump: extend ... |
1552 1553 1554 1555 1556 |
size = count * 64; names_ofs = (2 + 3 * count) * sizeof(data[0]); alloc: if (size >= MAX_FILE_NOTE_SIZE) /* paranoia check */ |
720236569 fs/binfmt_elf.c: ... |
1557 |
return -EINVAL; |
2aa362c49 coredump: extend ... |
1558 |
size = round_up(size, PAGE_SIZE); |
1fbede6e6 fs/binfmt_elf.c: ... |
1559 1560 1561 1562 |
/* * "size" can be 0 here legitimately. * Let it ENOMEM and omit NT_FILE section which will be empty anyway. */ |
86a2bb5ad coredump: fix spa... |
1563 1564 |
data = kvmalloc(size, GFP_KERNEL); if (ZERO_OR_NULL_PTR(data)) |
720236569 fs/binfmt_elf.c: ... |
1565 |
return -ENOMEM; |
2aa362c49 coredump: extend ... |
1566 1567 1568 1569 1570 |
start_end_ofs = data + 2; name_base = name_curpos = ((char *)data) + names_ofs; remaining = size - names_ofs; count = 0; |
03c6d723e fs/binfmt_elf.c: ... |
1571 |
for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) { |
2aa362c49 coredump: extend ... |
1572 1573 1574 1575 1576 1577 |
struct file *file; const char *filename; file = vma->vm_file; if (!file) continue; |
9bf39ab2a vfs: add file_pat... |
1578 |
filename = file_path(file, name_curpos, remaining); |
2aa362c49 coredump: extend ... |
1579 1580 |
if (IS_ERR(filename)) { if (PTR_ERR(filename) == -ENAMETOOLONG) { |
86a2bb5ad coredump: fix spa... |
1581 |
kvfree(data); |
2aa362c49 coredump: extend ... |
1582 1583 1584 1585 1586 |
size = size * 5 / 4; goto alloc; } continue; } |
9bf39ab2a vfs: add file_pat... |
1587 |
/* file_path() fills at the end, move name down */ |
2aa362c49 coredump: extend ... |
1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 |
/* n = strlen(filename) + 1: */ n = (name_curpos + remaining) - filename; remaining = filename - name_curpos; memmove(name_curpos, filename, n); name_curpos += n; *start_end_ofs++ = vma->vm_start; *start_end_ofs++ = vma->vm_end; *start_end_ofs++ = vma->vm_pgoff; count++; } /* Now we know exact count of files, can store it */ data[0] = count; data[1] = PAGE_SIZE; /* |
03c6d723e fs/binfmt_elf.c: ... |
1604 |
* Count usually is less than mm->map_count, |
2aa362c49 coredump: extend ... |
1605 1606 |
* we need to move filenames down. */ |
03c6d723e fs/binfmt_elf.c: ... |
1607 |
n = mm->map_count - count; |
2aa362c49 coredump: extend ... |
1608 1609 1610 1611 1612 1613 1614 1615 1616 |
if (n != 0) { unsigned shift_bytes = n * 3 * sizeof(data[0]); memmove(name_base - shift_bytes, name_base, name_curpos - name_base); name_curpos -= shift_bytes; } size = name_curpos - (char *)data; fill_note(note, "CORE", NT_FILE, size, data); |
720236569 fs/binfmt_elf.c: ... |
1617 |
return 0; |
2aa362c49 coredump: extend ... |
1618 |
} |
4206d3aa1 elf core dump: no... |
1619 1620 1621 1622 1623 1624 1625 |
#ifdef CORE_DUMP_USE_REGSET #include <linux/regset.h> struct elf_thread_core_info { struct elf_thread_core_info *next; struct task_struct *task; struct elf_prstatus prstatus; |
5e01fdff0 fs: Replace zero-... |
1626 |
struct memelfnote notes[]; |
4206d3aa1 elf core dump: no... |
1627 1628 1629 1630 1631 |
}; struct elf_note_info { struct elf_thread_core_info *thread; struct memelfnote psinfo; |
49ae4d4b1 coredump: add a n... |
1632 |
struct memelfnote signote; |
4206d3aa1 elf core dump: no... |
1633 |
struct memelfnote auxv; |
2aa362c49 coredump: extend ... |
1634 |
struct memelfnote files; |
49ae4d4b1 coredump: add a n... |
1635 |
user_siginfo_t csigdata; |
4206d3aa1 elf core dump: no... |
1636 1637 1638 |
size_t size; int thread_notes; }; |
d31472b6d core dump: user_r... |
1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 |
/* * When a regset has a writeback hook, we call it on each thread before * dumping user memory. On register window machines, this makes sure the * user memory backing the register data is up to date before we read it. */ static void do_thread_regset_writeback(struct task_struct *task, const struct user_regset *regset) { if (regset->writeback) regset->writeback(task, regset, 1); } |
0953f65d5 elf: Allow core d... |
1650 |
#ifndef PRSTATUS_SIZE |
90954e7b9 x86/coredump: Use... |
1651 |
#define PRSTATUS_SIZE(S, R) sizeof(S) |
0953f65d5 elf: Allow core d... |
1652 1653 1654 |
#endif #ifndef SET_PR_FPVALID |
90954e7b9 x86/coredump: Use... |
1655 |
#define SET_PR_FPVALID(S, V, R) ((S)->pr_fpvalid = (V)) |
0953f65d5 elf: Allow core d... |
1656 |
#endif |
4206d3aa1 elf core dump: no... |
1657 1658 1659 1660 1661 |
static int fill_thread_core_info(struct elf_thread_core_info *t, const struct user_regset_view *view, long signr, size_t *total) { unsigned int i; |
b4e9c9549 introduction of r... |
1662 |
int regset0_size; |
4206d3aa1 elf core dump: no... |
1663 1664 1665 1666 1667 1668 1669 1670 |
/* * NT_PRSTATUS is the one special case, because the regset data * goes into the pr_reg field inside the note contents, rather * than being the whole note contents. We fill the reset in here. * We assume that regset 0 is NT_PRSTATUS. */ fill_prstatus(&t->prstatus, t->task, signr); |
b4e9c9549 introduction of r... |
1671 1672 1673 1674 |
regset0_size = regset_get(t->task, &view->regsets[0], sizeof(t->prstatus.pr_reg), &t->prstatus.pr_reg); if (regset0_size < 0) return 0; |
4206d3aa1 elf core dump: no... |
1675 1676 |
fill_note(&t->notes[0], "CORE", NT_PRSTATUS, |
27e64b4be regset: Add suppo... |
1677 |
PRSTATUS_SIZE(t->prstatus, regset0_size), &t->prstatus); |
4206d3aa1 elf core dump: no... |
1678 |
*total += notesize(&t->notes[0]); |
d31472b6d core dump: user_r... |
1679 |
do_thread_regset_writeback(t->task, &view->regsets[0]); |
4206d3aa1 elf core dump: no... |
1680 1681 1682 1683 1684 1685 1686 |
/* * Each other regset might generate a note too. For each regset * that has no core_note_type or is inactive, we leave t->notes[i] * all zero and we'll know to skip writing it later. */ for (i = 1; i < view->n; ++i) { const struct user_regset *regset = &view->regsets[i]; |
b4e9c9549 introduction of r... |
1687 1688 1689 1690 |
int note_type = regset->core_note_type; bool is_fpreg = note_type == NT_PRFPREG; void *data; int ret; |
d31472b6d core dump: user_r... |
1691 |
do_thread_regset_writeback(t->task, regset); |
b4e9c9549 introduction of r... |
1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 |
if (!note_type) // not for coredumps continue; if (regset->active && regset->active(t->task, regset) <= 0) continue; ret = regset_get_alloc(t->task, regset, ~0U, &data); if (ret < 0) continue; if (is_fpreg) SET_PR_FPVALID(&t->prstatus, 1, regset0_size); fill_note(&t->notes[i], is_fpreg ? "CORE" : "LINUX", note_type, ret, data); *total += notesize(&t->notes[i]); |
4206d3aa1 elf core dump: no... |
1708 1709 1710 1711 1712 1713 1714 |
} return 1; } static int fill_note_info(struct elfhdr *elf, int phdrs, struct elf_note_info *info, |
ae7795bc6 signal: Distingui... |
1715 |
const kernel_siginfo_t *siginfo, struct pt_regs *regs) |
4206d3aa1 elf core dump: no... |
1716 1717 1718 1719 1720 |
{ struct task_struct *dump_task = current; const struct user_regset_view *view = task_user_regset_view(dump_task); struct elf_thread_core_info *t; struct elf_prpsinfo *psinfo; |
83914441f coredump: elf_cor... |
1721 |
struct core_thread *ct; |
4206d3aa1 elf core dump: no... |
1722 1723 1724 1725 1726 1727 |
unsigned int i; info->size = 0; info->thread = NULL; psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL); |
6899e92d6 binfmt_elf: fix c... |
1728 1729 |
if (psinfo == NULL) { info->psinfo.data = NULL; /* So we don't free this wrongly */ |
4206d3aa1 elf core dump: no... |
1730 |
return 0; |
6899e92d6 binfmt_elf: fix c... |
1731 |
} |
4206d3aa1 elf core dump: no... |
1732 |
|
e2dbe1255 elf: fix one chec... |
1733 |
fill_note(&info->psinfo, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo); |
4206d3aa1 elf core dump: no... |
1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 |
/* * Figure out how many notes we're going to need for each thread. */ info->thread_notes = 0; for (i = 0; i < view->n; ++i) if (view->regsets[i].core_note_type != 0) ++info->thread_notes; /* * Sanity check. We rely on regset 0 being in NT_PRSTATUS, * since it is our one special case. */ if (unlikely(info->thread_notes == 0) || unlikely(view->regsets[0].core_note_type != NT_PRSTATUS)) { WARN_ON(1); return 0; } /* * Initialize the ELF file header. */ fill_elf_header(elf, phdrs, |
d3330cf08 binfmt_elf: remov... |
1756 |
view->e_machine, view->e_flags); |
4206d3aa1 elf core dump: no... |
1757 1758 1759 1760 |
/* * Allocate a structure for each thread. */ |
83914441f coredump: elf_cor... |
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 |
for (ct = &dump_task->mm->core_state->dumper; ct; ct = ct->next) { t = kzalloc(offsetof(struct elf_thread_core_info, notes[info->thread_notes]), GFP_KERNEL); if (unlikely(!t)) return 0; t->task = ct->task; if (ct->task == dump_task || !info->thread) { t->next = info->thread; info->thread = t; } else { /* * Make sure to keep the original task at * the head of the list. */ t->next = info->thread->next; info->thread->next = t; |
4206d3aa1 elf core dump: no... |
1779 |
} |
83914441f coredump: elf_cor... |
1780 |
} |
4206d3aa1 elf core dump: no... |
1781 1782 1783 1784 1785 |
/* * Now fill in each thread's information. */ for (t = info->thread; t != NULL; t = t->next) |
5ab1c309b coredump: pass si... |
1786 |
if (!fill_thread_core_info(t, view, siginfo->si_signo, &info->size)) |
4206d3aa1 elf core dump: no... |
1787 1788 1789 1790 1791 1792 1793 |
return 0; /* * Fill in the two process-wide notes. */ fill_psinfo(psinfo, dump_task->group_leader, dump_task->mm); info->size += notesize(&info->psinfo); |
49ae4d4b1 coredump: add a n... |
1794 1795 |
fill_siginfo_note(&info->signote, &info->csigdata, siginfo); info->size += notesize(&info->signote); |
4206d3aa1 elf core dump: no... |
1796 1797 |
fill_auxv_note(&info->auxv, current->mm); info->size += notesize(&info->auxv); |
720236569 fs/binfmt_elf.c: ... |
1798 1799 |
if (fill_files_note(&info->files) == 0) info->size += notesize(&info->files); |
2aa362c49 coredump: extend ... |
1800 |
|
4206d3aa1 elf core dump: no... |
1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 |
return 1; } static size_t get_note_info_size(struct elf_note_info *info) { return info->size; } /* * Write all the notes for each thread. When writing the first thread, the * process-wide notes are interleaved after the first thread-specific note. */ static int write_note_info(struct elf_note_info *info, |
ecc8c7725 new helper: dump_... |
1814 |
struct coredump_params *cprm) |
4206d3aa1 elf core dump: no... |
1815 |
{ |
b219e25f8 fs/binfmt_elf.c: ... |
1816 |
bool first = true; |
4206d3aa1 elf core dump: no... |
1817 1818 1819 1820 |
struct elf_thread_core_info *t = info->thread; do { int i; |
ecc8c7725 new helper: dump_... |
1821 |
if (!writenote(&t->notes[0], cprm)) |
4206d3aa1 elf core dump: no... |
1822 |
return 0; |
ecc8c7725 new helper: dump_... |
1823 |
if (first && !writenote(&info->psinfo, cprm)) |
4206d3aa1 elf core dump: no... |
1824 |
return 0; |
ecc8c7725 new helper: dump_... |
1825 |
if (first && !writenote(&info->signote, cprm)) |
49ae4d4b1 coredump: add a n... |
1826 |
return 0; |
ecc8c7725 new helper: dump_... |
1827 |
if (first && !writenote(&info->auxv, cprm)) |
4206d3aa1 elf core dump: no... |
1828 |
return 0; |
720236569 fs/binfmt_elf.c: ... |
1829 |
if (first && info->files.data && |
ecc8c7725 new helper: dump_... |
1830 |
!writenote(&info->files, cprm)) |
2aa362c49 coredump: extend ... |
1831 |
return 0; |
4206d3aa1 elf core dump: no... |
1832 1833 1834 |
for (i = 1; i < info->thread_notes; ++i) if (t->notes[i].data && |
ecc8c7725 new helper: dump_... |
1835 |
!writenote(&t->notes[i], cprm)) |
4206d3aa1 elf core dump: no... |
1836 |
return 0; |
b219e25f8 fs/binfmt_elf.c: ... |
1837 |
first = false; |
4206d3aa1 elf core dump: no... |
1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 |
t = t->next; } while (t); return 1; } static void free_note_info(struct elf_note_info *info) { struct elf_thread_core_info *threads = info->thread; while (threads) { unsigned int i; struct elf_thread_core_info *t = threads; threads = t->next; WARN_ON(t->notes[0].data && t->notes[0].data != &t->prstatus); for (i = 1; i < info->thread_notes; ++i) kfree(t->notes[i].data); kfree(t); } kfree(info->psinfo.data); |
86a2bb5ad coredump: fix spa... |
1857 |
kvfree(info->files.data); |
4206d3aa1 elf core dump: no... |
1858 1859 1860 |
} #else |
1da177e4c Linux-2.6.12-rc2 |
1861 1862 1863 1864 1865 1866 1867 |
/* 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; |
1da177e4c Linux-2.6.12-rc2 |
1868 1869 1870 1871 1872 1873 |
struct memelfnote notes[3]; int num_notes; }; /* * In order to add the specific thread information for the elf file format, |
f4e5cc2c4 [PATCH] binfmt_el... |
1874 1875 |
* we need to keep a linked list of every threads pr_status and then create * a single section for them in the final core file. |
1da177e4c Linux-2.6.12-rc2 |
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 |
*/ static int elf_dump_thread_status(long signr, struct elf_thread_status *t) { int sz = 0; struct task_struct *p = t->thread; t->num_notes = 0; fill_prstatus(&t->prstatus, p, signr); elf_core_copy_task_regs(p, &t->prstatus.pr_reg); |
f4e5cc2c4 [PATCH] binfmt_el... |
1886 1887 |
fill_note(&t->notes[0], "CORE", NT_PRSTATUS, sizeof(t->prstatus), &(t->prstatus)); |
1da177e4c Linux-2.6.12-rc2 |
1888 1889 |
t->num_notes++; sz += notesize(&t->notes[0]); |
f4e5cc2c4 [PATCH] binfmt_el... |
1890 1891 1892 1893 |
if ((t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu))) { fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu), &(t->fpu)); |
1da177e4c Linux-2.6.12-rc2 |
1894 1895 1896 |
t->num_notes++; sz += notesize(&t->notes[1]); } |
1da177e4c Linux-2.6.12-rc2 |
1897 1898 |
return sz; } |
3aba481fc elf core dump: no... |
1899 1900 |
struct elf_note_info { struct memelfnote *notes; |
720236569 fs/binfmt_elf.c: ... |
1901 |
struct memelfnote *notes_files; |
3aba481fc elf core dump: no... |
1902 1903 1904 1905 |
struct elf_prstatus *prstatus; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo; /* NT_PRPSINFO */ struct list_head thread_list; elf_fpregset_t *fpu; |
49ae4d4b1 coredump: add a n... |
1906 |
user_siginfo_t csigdata; |
3aba481fc elf core dump: no... |
1907 1908 1909 |
int thread_status_size; int numnote; }; |
0cf062d0f elf: clean up fil... |
1910 |
static int elf_note_info_init(struct elf_note_info *info) |
3aba481fc elf core dump: no... |
1911 |
{ |
0cf062d0f elf: clean up fil... |
1912 |
memset(info, 0, sizeof(*info)); |
3aba481fc elf core dump: no... |
1913 |
INIT_LIST_HEAD(&info->thread_list); |
49ae4d4b1 coredump: add a n... |
1914 |
/* Allocate space for ELF notes */ |
6da2ec560 treewide: kmalloc... |
1915 |
info->notes = kmalloc_array(8, sizeof(struct memelfnote), GFP_KERNEL); |
3aba481fc elf core dump: no... |
1916 1917 1918 1919 |
if (!info->notes) return 0; info->psinfo = kmalloc(sizeof(*info->psinfo), GFP_KERNEL); if (!info->psinfo) |
f34f9d186 coredump: prevent... |
1920 |
return 0; |
3aba481fc elf core dump: no... |
1921 1922 |
info->prstatus = kmalloc(sizeof(*info->prstatus), GFP_KERNEL); if (!info->prstatus) |
f34f9d186 coredump: prevent... |
1923 |
return 0; |
3aba481fc elf core dump: no... |
1924 1925 |
info->fpu = kmalloc(sizeof(*info->fpu), GFP_KERNEL); if (!info->fpu) |
f34f9d186 coredump: prevent... |
1926 |
return 0; |
0cf062d0f elf: clean up fil... |
1927 |
return 1; |
0cf062d0f elf: clean up fil... |
1928 1929 1930 1931 |
} static int fill_note_info(struct elfhdr *elf, int phdrs, struct elf_note_info *info, |
ae7795bc6 signal: Distingui... |
1932 |
const kernel_siginfo_t *siginfo, struct pt_regs *regs) |
0cf062d0f elf: clean up fil... |
1933 |
{ |
afabada95 elf{,_fdpic} core... |
1934 1935 |
struct core_thread *ct; struct elf_thread_status *ets; |
0cf062d0f elf: clean up fil... |
1936 1937 1938 |
if (!elf_note_info_init(info)) return 0; |
3aba481fc elf core dump: no... |
1939 |
|
afabada95 elf{,_fdpic} core... |
1940 1941 1942 1943 1944 |
for (ct = current->mm->core_state->dumper.next; ct; ct = ct->next) { ets = kzalloc(sizeof(*ets), GFP_KERNEL); if (!ets) return 0; |
83914441f coredump: elf_cor... |
1945 |
|
afabada95 elf{,_fdpic} core... |
1946 1947 1948 |
ets->thread = ct->task; list_add(&ets->list, &info->thread_list); } |
83914441f coredump: elf_cor... |
1949 |
|
93f044e28 fs/binfmt_elf.c: ... |
1950 |
list_for_each_entry(ets, &info->thread_list, list) { |
afabada95 elf{,_fdpic} core... |
1951 |
int sz; |
3aba481fc elf core dump: no... |
1952 |
|
afabada95 elf{,_fdpic} core... |
1953 1954 |
sz = elf_dump_thread_status(siginfo->si_signo, ets); info->thread_status_size += sz; |
3aba481fc elf core dump: no... |
1955 1956 1957 |
} /* now collect the dump for the current */ memset(info->prstatus, 0, sizeof(*info->prstatus)); |
5ab1c309b coredump: pass si... |
1958 |
fill_prstatus(info->prstatus, current, siginfo->si_signo); |
3aba481fc elf core dump: no... |
1959 1960 1961 |
elf_core_copy_regs(&info->prstatus->pr_reg, regs); /* Set up header */ |
d3330cf08 binfmt_elf: remov... |
1962 |
fill_elf_header(elf, phdrs, ELF_ARCH, ELF_CORE_EFLAGS); |
3aba481fc elf core dump: no... |
1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 |
/* * Set up the notes in similar form to SVR4 core dumps made * with info from their /proc. */ fill_note(info->notes + 0, "CORE", NT_PRSTATUS, sizeof(*info->prstatus), info->prstatus); fill_psinfo(info->psinfo, current->group_leader, current->mm); fill_note(info->notes + 1, "CORE", NT_PRPSINFO, sizeof(*info->psinfo), info->psinfo); |
2aa362c49 coredump: extend ... |
1974 1975 |
fill_siginfo_note(info->notes + 2, &info->csigdata, siginfo); fill_auxv_note(info->notes + 3, current->mm); |
720236569 fs/binfmt_elf.c: ... |
1976 |
info->numnote = 4; |
3aba481fc elf core dump: no... |
1977 |
|
720236569 fs/binfmt_elf.c: ... |
1978 1979 1980 1981 |
if (fill_files_note(info->notes + info->numnote) == 0) { info->notes_files = info->notes + info->numnote; info->numnote++; } |
3aba481fc elf core dump: no... |
1982 1983 1984 1985 1986 1987 1988 |
/* Try to dump the FPU. */ info->prstatus->pr_fpvalid = elf_core_copy_task_fpregs(current, regs, info->fpu); if (info->prstatus->pr_fpvalid) fill_note(info->notes + info->numnote++, "CORE", NT_PRFPREG, sizeof(*info->fpu), info->fpu); |
3aba481fc elf core dump: no... |
1989 |
return 1; |
3aba481fc elf core dump: no... |
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 |
} static size_t get_note_info_size(struct elf_note_info *info) { int sz = 0; int i; for (i = 0; i < info->numnote; i++) sz += notesize(info->notes + i); sz += info->thread_status_size; return sz; } static int write_note_info(struct elf_note_info *info, |
ecc8c7725 new helper: dump_... |
2006 |
struct coredump_params *cprm) |
3aba481fc elf core dump: no... |
2007 |
{ |
93f044e28 fs/binfmt_elf.c: ... |
2008 |
struct elf_thread_status *ets; |
3aba481fc elf core dump: no... |
2009 |
int i; |
3aba481fc elf core dump: no... |
2010 2011 |
for (i = 0; i < info->numnote; i++) |
ecc8c7725 new helper: dump_... |
2012 |
if (!writenote(info->notes + i, cprm)) |
3aba481fc elf core dump: no... |
2013 2014 2015 |
return 0; /* write out the thread status notes section */ |
93f044e28 fs/binfmt_elf.c: ... |
2016 2017 2018 |
list_for_each_entry(ets, &info->thread_list, list) { for (i = 0; i < ets->num_notes; i++) if (!writenote(&ets->notes[i], cprm)) |
3aba481fc elf core dump: no... |
2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 |
return 0; } return 1; } static void free_note_info(struct elf_note_info *info) { while (!list_empty(&info->thread_list)) { struct list_head *tmp = info->thread_list.next; list_del(tmp); kfree(list_entry(tmp, struct elf_thread_status, list)); } |
720236569 fs/binfmt_elf.c: ... |
2032 2033 |
/* Free data possibly allocated by fill_files_note(): */ if (info->notes_files) |
86a2bb5ad coredump: fix spa... |
2034 |
kvfree(info->notes_files->data); |
2aa362c49 coredump: extend ... |
2035 |
|
3aba481fc elf core dump: no... |
2036 2037 2038 2039 |
kfree(info->prstatus); kfree(info->psinfo); kfree(info->notes); kfree(info->fpu); |
3aba481fc elf core dump: no... |
2040 |
} |
4206d3aa1 elf core dump: no... |
2041 |
#endif |
8d9032bbe elf coredump: add... |
2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 |
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; } |
1da177e4c Linux-2.6.12-rc2 |
2057 2058 2059 2060 2061 2062 2063 |
/* * 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... |
2064 |
static int elf_core_dump(struct coredump_params *cprm) |
1da177e4c Linux-2.6.12-rc2 |
2065 |
{ |
1da177e4c Linux-2.6.12-rc2 |
2066 |
int has_dumped = 0; |
a07279c9a binfmt_elf, binfm... |
2067 2068 |
int vma_count, segs, i; size_t vma_data_size; |
225a3f53e fs/binfmt_elf.c: ... |
2069 |
struct elfhdr elf; |
cdc3d5627 switch elf_coredu... |
2070 |
loff_t offset = 0, dataoff; |
720236569 fs/binfmt_elf.c: ... |
2071 |
struct elf_note_info info = { }; |
93eb211e6 elf coredump: mak... |
2072 |
struct elf_phdr *phdr4note = NULL; |
8d9032bbe elf coredump: add... |
2073 2074 2075 |
struct elf_shdr *shdr4extnum = NULL; Elf_Half e_phnum; elf_addr_t e_shoff; |
a07279c9a binfmt_elf, binfm... |
2076 2077 2078 2079 |
struct core_vma_metadata *vma_meta; if (dump_vma_snapshot(cprm, &vma_count, &vma_meta, &vma_data_size)) return 0; |
1da177e4c Linux-2.6.12-rc2 |
2080 |
|
341c87bf3 elf: limit max ma... |
2081 2082 2083 2084 |
/* * The number of segs are recored into ELF header as 16bit value. * Please check DEFAULT_MAX_MAP_COUNT definition when you modify here. */ |
a07279c9a binfmt_elf, binfm... |
2085 |
segs = vma_count + elf_core_extra_phdrs(); |
f47aef55d [PATCH] i386 vDSO... |
2086 |
|
8d9032bbe elf coredump: add... |
2087 2088 2089 2090 2091 2092 2093 |
/* 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; |
1da177e4c Linux-2.6.12-rc2 |
2094 |
/* |
3aba481fc elf core dump: no... |
2095 2096 |
* Collect all the non-memory information about the process for the * notes. This also sets up the file header. |
1da177e4c Linux-2.6.12-rc2 |
2097 |
*/ |
225a3f53e fs/binfmt_elf.c: ... |
2098 |
if (!fill_note_info(&elf, e_phnum, &info, cprm->siginfo, cprm->regs)) |
d2530b436 binfmt_elf: remov... |
2099 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2100 |
|
3aba481fc elf core dump: no... |
2101 |
has_dumped = 1; |
079148b91 coredump: factor ... |
2102 |
|
225a3f53e fs/binfmt_elf.c: ... |
2103 |
offset += sizeof(elf); /* Elf header */ |
8d9032bbe elf coredump: add... |
2104 |
offset += segs * sizeof(struct elf_phdr); /* Program headers */ |
1da177e4c Linux-2.6.12-rc2 |
2105 2106 2107 |
/* Write notes phdr entry */ { |
3aba481fc elf core dump: no... |
2108 |
size_t sz = get_note_info_size(&info); |
1da177e4c Linux-2.6.12-rc2 |
2109 |
|
e55014923 [POWERPC] spufs: ... |
2110 |
sz += elf_coredump_extra_notes_size(); |
bf1ab978b [POWERPC] coredum... |
2111 |
|
93eb211e6 elf coredump: mak... |
2112 2113 |
phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL); if (!phdr4note) |
088e7af73 coredump: move du... |
2114 |
goto end_coredump; |
93eb211e6 elf coredump: mak... |
2115 2116 2117 |
fill_elf_note_phdr(phdr4note, sz, offset); offset += sz; |
1da177e4c Linux-2.6.12-rc2 |
2118 |
} |
1da177e4c Linux-2.6.12-rc2 |
2119 |
dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
52f5592e5 fs/binfmt_elf.c: ... |
2120 |
offset += vma_data_size; |
8d9032bbe elf coredump: add... |
2121 2122 2123 2124 2125 2126 2127 |
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; |
225a3f53e fs/binfmt_elf.c: ... |
2128 |
fill_extnum_info(&elf, shdr4extnum, e_shoff, segs); |
8d9032bbe elf coredump: add... |
2129 2130 2131 |
} offset = dataoff; |
225a3f53e fs/binfmt_elf.c: ... |
2132 |
if (!dump_emit(cprm, &elf, sizeof(elf))) |
93eb211e6 elf coredump: mak... |
2133 |
goto end_coredump; |
ecc8c7725 new helper: dump_... |
2134 |
if (!dump_emit(cprm, phdr4note, sizeof(*phdr4note))) |
93eb211e6 elf coredump: mak... |
2135 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2136 |
/* Write program headers for segments dump */ |
a07279c9a binfmt_elf, binfm... |
2137 2138 |
for (i = 0; i < vma_count; i++) { struct core_vma_metadata *meta = vma_meta + i; |
1da177e4c Linux-2.6.12-rc2 |
2139 |
struct elf_phdr phdr; |
1da177e4c Linux-2.6.12-rc2 |
2140 2141 2142 |
phdr.p_type = PT_LOAD; phdr.p_offset = offset; |
a07279c9a binfmt_elf, binfm... |
2143 |
phdr.p_vaddr = meta->start; |
1da177e4c Linux-2.6.12-rc2 |
2144 |
phdr.p_paddr = 0; |
a07279c9a binfmt_elf, binfm... |
2145 2146 |
phdr.p_filesz = meta->dump_size; phdr.p_memsz = meta->end - meta->start; |
1da177e4c Linux-2.6.12-rc2 |
2147 |
offset += phdr.p_filesz; |
a07279c9a binfmt_elf, binfm... |
2148 2149 2150 2151 |
phdr.p_flags = 0; if (meta->flags & VM_READ) phdr.p_flags |= PF_R; if (meta->flags & VM_WRITE) |
f4e5cc2c4 [PATCH] binfmt_el... |
2152 |
phdr.p_flags |= PF_W; |
a07279c9a binfmt_elf, binfm... |
2153 |
if (meta->flags & VM_EXEC) |
f4e5cc2c4 [PATCH] binfmt_el... |
2154 |
phdr.p_flags |= PF_X; |
1da177e4c Linux-2.6.12-rc2 |
2155 |
phdr.p_align = ELF_EXEC_PAGESIZE; |
ecc8c7725 new helper: dump_... |
2156 |
if (!dump_emit(cprm, &phdr, sizeof(phdr))) |
088e7af73 coredump: move du... |
2157 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2158 |
} |
506f21c55 switch elf_core_w... |
2159 |
if (!elf_core_write_extra_phdrs(cprm, offset)) |
1fcccbac8 elf coredump: rep... |
2160 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2161 2162 |
/* write out the notes section */ |
ecc8c7725 new helper: dump_... |
2163 |
if (!write_note_info(&info, cprm)) |
3aba481fc elf core dump: no... |
2164 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2165 |
|
cdc3d5627 switch elf_coredu... |
2166 |
if (elf_coredump_extra_notes_write(cprm)) |
e55014923 [POWERPC] spufs: ... |
2167 |
goto end_coredump; |
bf1ab978b [POWERPC] coredum... |
2168 |
|
d025c9db7 [PATCH] Support p... |
2169 |
/* Align to page */ |
1607f09c2 coredump: fix dum... |
2170 |
if (!dump_skip(cprm, dataoff - cprm->pos)) |
f3e8fccd0 mm: add get_dump_... |
2171 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2172 |
|
a07279c9a binfmt_elf, binfm... |
2173 2174 2175 2176 |
for (i = 0; i < vma_count; i++) { struct core_vma_metadata *meta = vma_meta + i; if (!dump_user_range(cprm, meta->start, meta->dump_size)) |
afc63a97b coredump: refacto... |
2177 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2178 |
} |
4d22c75d4 coredump: Ensure ... |
2179 |
dump_truncate(cprm); |
1da177e4c Linux-2.6.12-rc2 |
2180 |
|
aa3e7eaf0 switch elf_core_w... |
2181 |
if (!elf_core_write_extra_data(cprm)) |
1fcccbac8 elf coredump: rep... |
2182 |
goto end_coredump; |
1da177e4c Linux-2.6.12-rc2 |
2183 |
|
8d9032bbe elf coredump: add... |
2184 |
if (e_phnum == PN_XNUM) { |
13046ece9 binfmt_elf: conve... |
2185 |
if (!dump_emit(cprm, shdr4extnum, sizeof(*shdr4extnum))) |
8d9032bbe elf coredump: add... |
2186 2187 |
goto end_coredump; } |
1da177e4c Linux-2.6.12-rc2 |
2188 |
end_coredump: |
3aba481fc elf core dump: no... |
2189 |
free_note_info(&info); |
8d9032bbe elf coredump: add... |
2190 |
kfree(shdr4extnum); |
a07279c9a binfmt_elf, binfm... |
2191 |
kvfree(vma_meta); |
93eb211e6 elf coredump: mak... |
2192 |
kfree(phdr4note); |
1da177e4c Linux-2.6.12-rc2 |
2193 |
return has_dumped; |
1da177e4c Linux-2.6.12-rc2 |
2194 |
} |
698ba7b5a elf: kill USE_ELF... |
2195 |
#endif /* CONFIG_ELF_CORE */ |
1da177e4c Linux-2.6.12-rc2 |
2196 2197 2198 |
static int __init init_elf_binfmt(void) { |
8fc3dc5a3 __register_binfmt... |
2199 2200 |
register_binfmt(&elf_format); return 0; |
1da177e4c Linux-2.6.12-rc2 |
2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 |
} static void __exit exit_elf_binfmt(void) { /* Remove the COFF and ELF loaders. */ unregister_binfmt(&elf_format); } core_initcall(init_elf_binfmt); module_exit(exit_elf_binfmt); MODULE_LICENSE("GPL"); |