diff options
Diffstat (limited to 'include/linux/binfmts.h')
| -rw-r--r-- | include/linux/binfmts.h | 95 |
1 files changed, 55 insertions, 40 deletions
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h index b7fc55ec8d4..61f29e5ea84 100644 --- a/include/linux/binfmts.h +++ b/include/linux/binfmts.h @@ -1,54 +1,49 @@ #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> +#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{ +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 */ - int sh_bang; + 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; - int e_uid, e_gid; - kernel_cap_t cap_inheritable, cap_permitted; - bool cap_effective; - void *security; + 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; - char * filename; /* Name of binary as seen by procps */ - char * interp; /* Name of the binary really executed. Most + 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; - unsigned long argv_len; }; #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0 @@ -58,6 +53,15 @@ struct linux_binprm{ #define BINPRM_FLAGS_EXECFD_BIT 1 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_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 @@ -66,25 +70,35 @@ struct linux_binprm{ struct linux_binfmt { struct list_head lh; struct module *module; - int (*load_binary)(struct linux_binprm *, struct pt_regs * regs); + int (*load_binary)(struct linux_binprm *); int (*load_shlib)(struct file *); - int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); + int (*core_dump)(struct coredump_params *cprm); unsigned long min_coredump; /* minimal dump size */ - int hasvdso; }; -extern int register_binfmt(struct linux_binfmt *); +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 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; -#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 */ @@ -94,11 +108,12 @@ extern int suid_dumpable; 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,char ** argv,struct linux_binprm *bprm); -extern void compute_creds(struct linux_binprm *binprm); -extern int do_coredump(long signr, int exit_code, struct pt_regs * regs); -extern int set_binfmt(struct linux_binfmt *new); +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 /* __KERNEL__ */ #endif /* _LINUX_BINFMTS_H */ |