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53 lines
1.1 KiB
53 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/mm_types.h>
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#include <linux/binfmts.h>
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#include <linux/a.out.h>
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static int load_binary(struct linux_binprm *bprm)
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{
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struct exec *eh = (struct exec *)bprm->buf;
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unsigned long loader;
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struct file *file;
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int retval;
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if (eh->fh.f_magic != 0x183 || (eh->fh.f_flags & 0x3000) != 0x3000)
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return -ENOEXEC;
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if (bprm->loader)
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return -ENOEXEC;
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allow_write_access(bprm->file);
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fput(bprm->file);
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bprm->file = NULL;
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loader = bprm->vma->vm_end - sizeof(void *);
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file = open_exec("/sbin/loader");
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retval = PTR_ERR(file);
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if (IS_ERR(file))
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return retval;
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/* Remember if the application is TASO. */
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bprm->taso = eh->ah.entry < 0x100000000UL;
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bprm->file = file;
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bprm->loader = loader;
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retval = prepare_binprm(bprm);
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if (retval < 0)
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return retval;
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return search_binary_handler(bprm);
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}
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static struct linux_binfmt loader_format = {
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.load_binary = load_binary,
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};
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static int __init init_loader_binfmt(void)
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{
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insert_binfmt(&loader_format);
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return 0;
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}
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arch_initcall(init_loader_binfmt);
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