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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154/* 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; unsigned long argmin; /* rlimit marker for copy_strings() */#else# define MAX_ARG_PAGES 32 struct page *page[MAX_ARG_PAGES];#endif struct mm_struct *mm; struct mm_struct *old_mm; /* replaced address space, freed by setup_new_exec() */ /* user_ns published to task->exec_state at execve, narrowed by would_dump(). */ struct user_namespace *user_ns; unsigned long p; /* current top of mem */ 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, /* Set when "comm" must come from the dentry. */ comm_from_dentry:1, /* * Set by user space to check executability according to the * caller's environment. */ is_check: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 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 *);#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 */