[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / binfmts.h

#ifndef _LINUX_BINFMTS_H
#define _LINUX_BINFMTS_H

#include <linux/capability.h>

struct pt_regs;

/*
 * These are the maximum length and maximum number of strings passed to the
 * execve() system call.  MAX_ARG_STRLEN is essentially random but serves to
 * prevent the kernel from being unduly impacted by misaddressed pointers.
 * MAX_ARG_STRINGS is chosen to fit in a signed 32-bit integer.
 */
#define MAX_ARG_STRLEN (PAGE_SIZE * 32)
#define MAX_ARG_STRINGS 0x7FFFFFFF

/* sizeof(linux_binprm->buf) */
#define BINPRM_BUF_SIZE 128

#ifdef __KERNEL__
#include <linux/sched.h>

#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;
	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;
	char tcomm[TASK_COMM_LEN];
};

#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)

#define BINPRM_MAX_RECURSION 4

/* Function parameter for binfmt->coredump */
struct coredump_params {
	long signr;
	struct pt_regs *regs;
	struct file *file;
	unsigned long limit;
	unsigned long mm_flags;
};

/*
 * 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 *, struct  pt_regs * regs);
	int (*load_shlib)(struct file *);
	int (*core_dump)(struct coredump_params *cprm);
	unsigned long min_coredump;	/* minimal dump size */
};

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 *, struct pt_regs *);
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;
#define SUID_DUMP_DISABLE	0	/* No setuid dumping */
#define SUID_DUMP_USER		1	/* Dump as user of process */
#define SUID_DUMP_ROOT		2	/* Dump as root */

/* 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 bprm_mm_init(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 do_coredump(long signr, int exit_code, struct pt_regs *regs);
extern void set_binfmt(struct linux_binfmt *new);
extern void free_bprm(struct linux_binprm *);

#endif /* __KERNEL__ */
#endif /* _LINUX_BINFMTS_H */
Commit	Line	Data
	1	#ifndef _LINUX_BINFMTS_H
	2	#define _LINUX_BINFMTS_H
	3
	4	#include <linux/capability.h>
	5
	6	struct pt_regs;
	7
	8	/*
	9	* These are the maximum length and maximum number of strings passed to the
	10	* execve() system call. MAX_ARG_STRLEN is essentially random but serves to
	11	* prevent the kernel from being unduly impacted by misaddressed pointers.
	12	* MAX_ARG_STRINGS is chosen to fit in a signed 32-bit integer.
	13	*/
	14	#define MAX_ARG_STRLEN (PAGE_SIZE * 32)
	15	#define MAX_ARG_STRINGS 0x7FFFFFFF
	16
	17	/* sizeof(linux_binprm->buf) */
	18	#define BINPRM_BUF_SIZE 128
	19
	20	#ifdef __KERNEL__
	21	#include <linux/sched.h>
	22
	23	#define CORENAME_MAX_SIZE 128
	24
	25	/*
	26	* This structure is used to hold the arguments that are used when loading binaries.
	27	*/
	28	struct linux_binprm {
	29	char buf[BINPRM_BUF_SIZE];
	30	#ifdef CONFIG_MMU
	31	struct vm_area_struct *vma;
	32	unsigned long vma_pages;
	33	#else
	34	# define MAX_ARG_PAGES 32
	35	struct page *page[MAX_ARG_PAGES];
	36	#endif
	37	struct mm_struct *mm;
	38	unsigned long p; /* current top of mem */
	39	unsigned int
	40	cred_prepared:1,/* true if creds already prepared (multiple
	41	* preps happen for interpreters) */
	42	cap_effective:1;/* true if has elevated effective capabilities,
	43	* false if not; except for init which inherits
	44	* its parent's caps anyway */
	45	#ifdef __alpha__
	46	unsigned int taso:1;
	47	#endif
	48	unsigned int recursion_depth;
	49	struct file * file;
	50	struct cred cred; / new credentials */
	51	int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_) /
	52	unsigned int per_clear; /* bits to clear in current->personality */
	53	int argc, envc;
	54	const char * filename; /* Name of binary as seen by procps */
	55	const char * interp; /* Name of the binary really executed. Most
	56	of the time same as filename, but could be
	57	different for binfmt_{misc,script} */
	58	unsigned interp_flags;
	59	unsigned interp_data;
	60	unsigned long loader, exec;
	61	char tcomm[TASK_COMM_LEN];
	62	};
	63
	64	#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
	65	#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
	66
	67	/* fd of the binary should be passed to the interpreter */
	68	#define BINPRM_FLAGS_EXECFD_BIT 1
	69	#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
	70
	71	#define BINPRM_MAX_RECURSION 4
	72
	73	/* Function parameter for binfmt->coredump */
	74	struct coredump_params {
	75	long signr;
	76	struct pt_regs *regs;
	77	struct file *file;
	78	unsigned long limit;
	79	unsigned long mm_flags;
	80	};
	81
	82	/*
	83	* This structure defines the functions that are used to load the binary formats that
	84	* linux accepts.
	85	*/
	86	struct linux_binfmt {
	87	struct list_head lh;
	88	struct module *module;
	89	int (load_binary)(struct linux_binprm , struct pt_regs * regs);
	90	int (load_shlib)(struct file );
	91	int (core_dump)(struct coredump_params cprm);
	92	unsigned long min_coredump; /* minimal dump size */
	93	};
	94
	95	extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
	96
	97	/* Registration of default binfmt handlers */
	98	static inline void register_binfmt(struct linux_binfmt *fmt)
	99	{
	100	__register_binfmt(fmt, 0);
	101	}
	102	/* Same as above, but adds a new binfmt at the top of the list */
	103	static inline void insert_binfmt(struct linux_binfmt *fmt)
	104	{
	105	__register_binfmt(fmt, 1);
	106	}
	107
	108	extern void unregister_binfmt(struct linux_binfmt *);
	109
	110	extern int prepare_binprm(struct linux_binprm *);
	111	extern int __must_check remove_arg_zero(struct linux_binprm *);
	112	extern int search_binary_handler(struct linux_binprm , struct pt_regs );
	113	extern int flush_old_exec(struct linux_binprm * bprm);
	114	extern void setup_new_exec(struct linux_binprm * bprm);
	115	extern void would_dump(struct linux_binprm , struct file );
	116
	117	extern int suid_dumpable;
	118	#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
	119	#define SUID_DUMP_USER 1 /* Dump as user of process */
	120	#define SUID_DUMP_ROOT 2 /* Dump as root */
	121
	122	/* Stack area protections */
	123	#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
	124	#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
	125	#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
	126
	127	extern int setup_arg_pages(struct linux_binprm * bprm,
	128	unsigned long stack_top,
	129	int executable_stack);
	130	extern int bprm_mm_init(struct linux_binprm *bprm);
	131	extern int copy_strings_kernel(int argc, const char const argv,
	132	struct linux_binprm *bprm);
	133	extern int prepare_bprm_creds(struct linux_binprm *bprm);
	134	extern void install_exec_creds(struct linux_binprm *bprm);
	135	extern void do_coredump(long signr, int exit_code, struct pt_regs *regs);
	136	extern void set_binfmt(struct linux_binfmt *new);
	137	extern void free_bprm(struct linux_binprm *);
	138
	139	#endif /* __KERNEL__ */
	140	#endif /* _LINUX_BINFMTS_H */