diff options
Diffstat (limited to 'include/linux/binfmts.h')
| -rw-r--r-- | include/linux/binfmts.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h new file mode 100644 index 00000000000..54f820832c7 --- /dev/null +++ b/include/linux/binfmts.h @@ -0,0 +1,87 @@ +#ifndef _LINUX_BINFMTS_H +#define _LINUX_BINFMTS_H + +#include <linux/capability.h> + +struct pt_regs; + +/* + * MAX_ARG_PAGES defines the number of pages allocated for arguments + * and envelope for the new program. 32 should suffice, this gives + * a maximum env+arg of 128kB w/4KB pages! + */ +#define MAX_ARG_PAGES 32 + +/* sizeof(linux_binprm->buf) */ +#define BINPRM_BUF_SIZE 128 + +#ifdef __KERNEL__ + +/* + * This structure is used to hold the arguments that are used when loading binaries. + */ +struct linux_binprm{ + char buf[BINPRM_BUF_SIZE]; + struct page *page[MAX_ARG_PAGES]; + struct mm_struct *mm; + unsigned long p; /* current top of mem */ + int sh_bang; + struct file * file; + int e_uid, e_gid; + kernel_cap_t cap_inheritable, cap_permitted, cap_effective; + void *security; + int argc, envc; + char * filename; /* Name of binary as seen by procps */ + 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) + + +/* + * This structure defines the functions that are used to load the binary formats that + * linux accepts. + */ +struct linux_binfmt { + struct linux_binfmt * next; + struct module *module; + int (*load_binary)(struct linux_binprm *, struct pt_regs * regs); + int (*load_shlib)(struct file *); + int (*core_dump)(long signr, struct pt_regs * regs, struct file * file); + unsigned long min_coredump; /* minimal dump size */ +}; + +extern int register_binfmt(struct linux_binfmt *); +extern int unregister_binfmt(struct linux_binfmt *); + +extern int prepare_binprm(struct linux_binprm *); +extern void remove_arg_zero(struct linux_binprm *); +extern int search_binary_handler(struct linux_binprm *,struct pt_regs *); +extern int flush_old_exec(struct linux_binprm * bprm); + +/* 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 copy_strings(int argc,char __user * __user * argv,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); + +#endif /* __KERNEL__ */ +#endif /* _LINUX_BINFMTS_H */ |