[mirror_ubuntu-artful-kernel.git] / include / linux / binfmts.h

#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;

#define CORENAME_MAX_SIZE 128

/*
 * This structure is used to hold the arguments that are used when loading binaries.
 */
struct linux_binprm {
	char buf[BINPRM_BUF_SIZE];
#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 int
		cred_prepared:1,/* true if creds already prepared (multiple
				 * preps happen for interpreters) */
		cap_effective:1;/* true if has elevated effective capabilities,
				 * false if not; except for init which inherits
				 * its parent's caps anyway */
#ifdef __alpha__
	unsigned int taso:1;
#endif
	unsigned int recursion_depth; /* only for search_binary_handler() */
	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} */
	unsigned interp_flags;
	unsigned interp_data;
	unsigned long loader, exec;
} __randomize_layout;

#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)

/* fd of the binary should be passed to the interpreter */
#define BINPRM_FLAGS_EXECFD_BIT 1
#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_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)

/* Function parameter for binfmt->coredump */
struct coredump_params {
	const siginfo_t *siginfo;
	struct pt_regs *regs;
	struct file *file;
	unsigned long limit;
	unsigned long mm_flags;
	loff_t written;
	loff_t pos;
};

/*
 * 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 *);
	int (*core_dump)(struct coredump_params *cprm);
	unsigned long min_coredump;	/* minimal dump size */
} __randomize_layout;

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 prepare_binprm(struct linux_binprm *);
extern int __must_check remove_arg_zero(struct linux_binprm *);
extern int search_binary_handler(struct linux_binprm *);
extern int flush_old_exec(struct linux_binprm * bprm);
extern void setup_new_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(char *interp, struct linux_binprm *bprm);
extern int copy_strings_kernel(int argc, const char *const *argv,
			       struct linux_binprm *bprm);
extern int prepare_bprm_creds(struct linux_binprm *bprm);
extern void install_exec_creds(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);

extern int do_execve(struct filename *,
		     const char __user * const __user *,
		     const char __user * const __user *);
extern int do_execveat(int, struct filename *,
		       const char __user * const __user *,
		       const char __user * const __user *,
		       int);

#endif /* _LINUX_BINFMTS_H */
Commit	Line	Data
	1	#ifndef _LINUX_BINFMTS_H
	2	#define _LINUX_BINFMTS_H
	3
	4	#include <linux/sched.h>
	5	#include <linux/unistd.h>
	6	#include <asm/exec.h>
	7	#include <uapi/linux/binfmts.h>
	8
	9	struct filename;
	10
	11	#define CORENAME_MAX_SIZE 128
	12
	13	/*
	14	* This structure is used to hold the arguments that are used when loading binaries.
	15	*/
	16	struct linux_binprm {
	17	char buf[BINPRM_BUF_SIZE];
	18	#ifdef CONFIG_MMU
	19	struct vm_area_struct *vma;
	20	unsigned long vma_pages;
	21	#else
	22	# define MAX_ARG_PAGES 32
	23	struct page *page[MAX_ARG_PAGES];
	24	#endif
	25	struct mm_struct *mm;
	26	unsigned long p; /* current top of mem */
	27	unsigned int
	28	cred_prepared:1,/* true if creds already prepared (multiple
	29	* preps happen for interpreters) */
	30	cap_effective:1;/* true if has elevated effective capabilities,
	31	* false if not; except for init which inherits
	32	* its parent's caps anyway */
	33	#ifdef __alpha__
	34	unsigned int taso:1;
	35	#endif
	36	unsigned int recursion_depth; /* only for search_binary_handler() */
	37	struct file * file;
	38	struct cred cred; / new credentials */
	39	int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_) /
	40	unsigned int per_clear; /* bits to clear in current->personality */
	41	int argc, envc;
	42	const char * filename; /* Name of binary as seen by procps */
	43	const char * interp; /* Name of the binary really executed. Most
	44	of the time same as filename, but could be
	45	different for binfmt_{misc,script} */
	46	unsigned interp_flags;
	47	unsigned interp_data;
	48	unsigned long loader, exec;
	49	} __randomize_layout;
	50
	51	#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
	52	#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
	53
	54	/* fd of the binary should be passed to the interpreter */
	55	#define BINPRM_FLAGS_EXECFD_BIT 1
	56	#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
	57
	58	/* filename of the binary will be inaccessible after exec */
	59	#define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2
	60	#define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT)
	61
	62	/* Function parameter for binfmt->coredump */
	63	struct coredump_params {
	64	const siginfo_t *siginfo;
	65	struct pt_regs *regs;
	66	struct file *file;
	67	unsigned long limit;
	68	unsigned long mm_flags;
	69	loff_t written;
	70	loff_t pos;
	71	};
	72
	73	/*
	74	* This structure defines the functions that are used to load the binary formats that
	75	* linux accepts.
	76	*/
	77	struct linux_binfmt {
	78	struct list_head lh;
	79	struct module *module;
	80	int (load_binary)(struct linux_binprm );
	81	int (load_shlib)(struct file );
	82	int (core_dump)(struct coredump_params cprm);
	83	unsigned long min_coredump; /* minimal dump size */
	84	} __randomize_layout;
	85
	86	extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
	87
	88	/* Registration of default binfmt handlers */
	89	static inline void register_binfmt(struct linux_binfmt *fmt)
	90	{
	91	__register_binfmt(fmt, 0);
	92	}
	93	/* Same as above, but adds a new binfmt at the top of the list */
	94	static inline void insert_binfmt(struct linux_binfmt *fmt)
	95	{
	96	__register_binfmt(fmt, 1);
	97	}
	98
	99	extern void unregister_binfmt(struct linux_binfmt *);
	100
	101	extern int prepare_binprm(struct linux_binprm *);
	102	extern int __must_check remove_arg_zero(struct linux_binprm *);
	103	extern int search_binary_handler(struct linux_binprm *);
	104	extern int flush_old_exec(struct linux_binprm * bprm);
	105	extern void setup_new_exec(struct linux_binprm * bprm);
	106	extern void would_dump(struct linux_binprm , struct file );
	107
	108	extern int suid_dumpable;
	109
	110	/* Stack area protections */
	111	#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
	112	#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
	113	#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
	114
	115	extern int setup_arg_pages(struct linux_binprm * bprm,
	116	unsigned long stack_top,
	117	int executable_stack);
	118	extern int transfer_args_to_stack(struct linux_binprm *bprm,
	119	unsigned long *sp_location);
	120	extern int bprm_change_interp(char interp, struct linux_binprm bprm);
	121	extern int copy_strings_kernel(int argc, const char const argv,
	122	struct linux_binprm *bprm);
	123	extern int prepare_bprm_creds(struct linux_binprm *bprm);
	124	extern void install_exec_creds(struct linux_binprm *bprm);
	125	extern void set_binfmt(struct linux_binfmt *new);
	126	extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
	127
	128	extern int do_execve(struct filename *,
	129	const char __user * const __user *,
	130	const char __user * const __user *);
	131	extern int do_execveat(int, struct filename *,
	132	const char __user * const __user *,
	133	const char __user * const __user *,
	134	int);
	135
	136	#endif /* _LINUX_BINFMTS_H */