diff options
Diffstat (limited to 'kernel/include/linux/binfmts.h')
| -rw-r--r-- | kernel/include/linux/binfmts.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/kernel/include/linux/binfmts.h b/kernel/include/linux/binfmts.h new file mode 100644 index 000000000..576e4639c --- /dev/null +++ b/kernel/include/linux/binfmts.h @@ -0,0 +1,123 @@ +#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> + +#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; +}; + +#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; +}; + +/* + * 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); +} +/* 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 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); + +#endif /* _LINUX_BINFMTS_H */ |