147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
/* 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;
|
|
|
|
#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;
|
|
#ifdef __alpha__
|
|
unsigned int taso:1;
|
|
#endif
|
|
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)
|
|
|
|
/* Function parameter for binfmt->coredump */
|
|
struct coredump_params {
|
|
const kernel_siginfo_t *siginfo;
|
|
struct pt_regs *regs;
|
|
struct file *file;
|
|
unsigned long limit;
|
|
unsigned long mm_flags;
|
|
loff_t written;
|
|
loff_t pos;
|
|
loff_t to_skip;
|
|
};
|
|
|
|
/*
|
|
* 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 __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 */
|