/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_BINFMTS_H#define _LINUX_BINFMTS_H #include <linux/sched.h>#include <linux/unistd.h>#include <asm/exec.h>#include <uapi/linux/binfmts.h> struct filename;struct coredump_params; #define CORENAME_MAX_SIZE 128 /* * This structure is used to hold the arguments that are used when loading binaries. */struct linux_binprm {#ifdef CONFIG_MMU	struct vm_area_struct *vma;	unsigned long vma_pages;#else# define MAX_ARG_PAGES	32	struct page *page[MAX_ARG_PAGES];#endif	struct mm_struct *mm;	unsigned long p; /* current top of mem */	unsigned long argmin; /* rlimit marker for copy_strings() */	unsigned int		/* Should an execfd be passed to userspace? */		have_execfd:1, 		/* Use the creds of a script (see binfmt_misc) */		execfd_creds:1,		/*		 * Set by bprm_creds_for_exec hook to indicate a		 * privilege-gaining exec has happened. Used to set		 * AT_SECURE auxv for glibc.		 */		secureexec:1,		/*		 * Set when errors can no longer be returned to the		 * original userspace.		 */		point_of_no_return:1;	struct file *executable; /* Executable to pass to the interpreter */	struct file *interpreter;	struct file *file;	struct cred *cred;	/* new credentials */	int unsafe;		/* how unsafe this exec is (mask of LSM_UNSAFE_*) */	unsigned int per_clear;	/* bits to clear in current->personality */	int argc, envc;	const char *filename;	/* Name of binary as seen by procps */	const char *interp;	/* Name of the binary really executed. Most				   of the time same as filename, but could be				   different for binfmt_{misc,script} */	const char *fdpath;	/* generated filename for execveat */	unsigned interp_flags;	int execfd;		/* File descriptor of the executable */	unsigned long loader, exec; 	struct rlimit rlim_stack; /* Saved RLIMIT_STACK used during exec. */ 	char buf[BINPRM_BUF_SIZE];} __randomize_layout; #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT) /* filename of the binary will be inaccessible after exec */#define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2#define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT) /* preserve argv0 for the interpreter  */#define BINPRM_FLAGS_PRESERVE_ARGV0_BIT 3#define BINPRM_FLAGS_PRESERVE_ARGV0 (1 << BINPRM_FLAGS_PRESERVE_ARGV0_BIT) /* * This structure defines the functions that are used to load the binary formats that * linux accepts. */struct linux_binfmt {	struct list_head lh;	struct module *module;	int (*load_binary)(struct linux_binprm *);	int (*load_shlib)(struct file *);#ifdef CONFIG_COREDUMP	int (*core_dump)(struct coredump_params *cprm);	unsigned long min_coredump;	/* minimal dump size */#endif} __randomize_layout; #if IS_ENABLED(CONFIG_BINFMT_MISC)struct binfmt_misc {	struct list_head entries;	rwlock_t entries_lock;	bool enabled;} __randomize_layout; extern struct binfmt_misc init_binfmt_misc;#endif extern void __register_binfmt(struct linux_binfmt *fmt, int insert); /* Registration of default binfmt handlers */static inline void register_binfmt(struct linux_binfmt *fmt){	__register_binfmt(fmt, 0);}/* Same as above, but adds a new binfmt at the top of the list */static inline void insert_binfmt(struct linux_binfmt *fmt){	__register_binfmt(fmt, 1);} extern void unregister_binfmt(struct linux_binfmt *); extern int __must_check remove_arg_zero(struct linux_binprm *);extern int begin_new_exec(struct linux_binprm * bprm);extern void setup_new_exec(struct linux_binprm * bprm);extern void finalize_exec(struct linux_binprm *bprm);extern void would_dump(struct linux_binprm *, struct file *); extern int suid_dumpable; /* Stack area protections */#define EXSTACK_DEFAULT   0	/* Whatever the arch defaults to */#define EXSTACK_DISABLE_X 1	/* Disable executable stacks */#define EXSTACK_ENABLE_X  2	/* Enable executable stacks */ extern int setup_arg_pages(struct linux_binprm * bprm,			   unsigned long stack_top,			   int executable_stack);extern int transfer_args_to_stack(struct linux_binprm *bprm,				  unsigned long *sp_location);extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm);int copy_string_kernel(const char *arg, struct linux_binprm *bprm);extern void set_binfmt(struct linux_binfmt *new);extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t); int kernel_execve(const char *filename,		  const char *const *argv, const char *const *envp); #endif /* _LINUX_BINFMTS_H */