linux-imx

// SPDX-License-Identifier: GPL-2.0

/****************************************************************************/

/*

 *  linux/fs/binfmt_flat.c

 *

 *  Copyright (C) 2000-2003 David McCullough <davidm@snapgear.com>

 *  Copyright (C) 2002 Greg Ungerer <gerg@snapgear.com>

 *  Copyright (C) 2002 SnapGear, by Paul Dale <pauli@snapgear.com>

 *  Copyright (C) 2000, 2001 Lineo, by David McCullough <davidm@lineo.com>

 *  based heavily on:

 *

 *  linux/fs/binfmt_aout.c:

 *      Copyright (C) 1991, 1992, 1996  Linus Torvalds

 *  linux/fs/binfmt_flat.c for 2.0 kernel

 *      Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>

 *  JAN/99 -- coded full program relocation (gerg@snapgear.com)

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/kernel.h>

#include <linux/sched.h>

#include <linux/sched/task_stack.h>

#include <linux/mm.h>

#include <linux/mman.h>

#include <linux/errno.h>

#include <linux/signal.h>

#include <linux/string.h>

#include <linux/fs.h>

#include <linux/file.h>

#include <linux/ptrace.h>

#include <linux/user.h>

#include <linux/slab.h>

#include <linux/binfmts.h>

#include <linux/personality.h>

#include <linux/init.h>

#include <linux/flat.h>

#include <linux/uaccess.h>

#include <linux/vmalloc.h>

​

#include <asm/byteorder.h>

#include <asm/unaligned.h>

#include <asm/cacheflush.h>

#include <asm/page.h>

​

/****************************************************************************/

​

/*

 * User data (data section and bss) needs to be aligned.

 * We pick 0x20 here because it is the max value elf2flt has always

 * used in producing FLAT files, and because it seems to be large

 * enough to make all the gcc alignment related tests happy.

 */

#define FLAT_DATA_ALIGN (0x20)

​

/*

 * User data (stack) also needs to be aligned.

 * Here we can be a bit looser than the data sections since this

 * needs to only meet arch ABI requirements.

 */

#define FLAT_STACK_ALIGN    max_t(unsigned long, sizeof(void *), ARCH_SLAB_MINALIGN)

​

#define RELOC_FAILED 0xff00ff01     /* Relocation incorrect somewhere */

#define UNLOADED_LIB 0x7ff000ff     /* Placeholder for unused library */

​

struct lib_info {

    struct {

        unsigned long start_code;       /* Start of text segment */

        unsigned long start_data;       /* Start of data segment */

        unsigned long start_brk;        /* End of data segment */

        unsigned long text_len;         /* Length of text segment */

        unsigned long entry;            /* Start address for this module */

        unsigned long build_date;       /* When this one was compiled */

        bool loaded;                /* Has this library been loaded? */

    } lib_list[MAX_SHARED_LIBS];

};

​

#ifdef CONFIG_BINFMT_SHARED_FLAT

static int load_flat_shared_library(int id, struct lib_info *p);

#endif

​

static int load_flat_binary(struct linux_binprm *);

static int flat_core_dump(struct coredump_params *cprm);

​

static struct linux_binfmt flat_format = {

    .module     = THIS_MODULE,

    .load_binary    = load_flat_binary,

    .core_dump  = flat_core_dump,

    .min_coredump   = PAGE_SIZE

};

​

/****************************************************************************/