cregit-Linux how code gets into the kernel

Release 4.12 include/linux/binfmts.h

Directory: include/linux


#include <linux/sched.h>
#include <linux/unistd.h>
#include <asm/exec.h>
#include <uapi/linux/binfmts.h>

struct filename;


 * This structure is used to hold the arguments that are used when loading binaries.

struct linux_binprm {
char buf[BINPRM_BUF_SIZE];
struct vm_area_struct *vma;
unsigned long vma_pages;

# define MAX_ARG_PAGES	32
struct page *page[MAX_ARG_PAGES];
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;
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;



/* fd of the binary should be passed to the interpreter */



/* filename of the binary will be inaccessible after exec */



/* 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 */

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); }


Ivan Kokshaysky1789.47%150.00%
Al Viro210.53%150.00%

/* 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); }


Ivan Kokshaysky1789.47%150.00%
Al Viro210.53%150.00%

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 */

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Al Viro427.25%813.33%
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David Howells356.04%46.67%
Masami Hiramatsu274.66%23.33%
Andrew Morton254.32%23.33%
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Directory: include/linux
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