lib/libexec/libexec.h

   1 #ifndef _LIBEXEC_H_
   2 #define _LIBEXEC_H_ 1
   3
   4 #include <sys/exec_elf.h>
   5
   6 struct exec_info;
   7
   8 typedef int (*libexec_loadfunc_t)(struct exec_info *execi,
   9         off_t offset, off_t vaddr, size_t len);
  10
  11 typedef int (*libexec_clearfunc_t)(struct exec_info *execi,
  12         off_t vaddr, size_t len);
  13
  14 typedef int (*libexec_allocfunc_t)(struct exec_info *execi,
  15         off_t vaddr, size_t len);
  16
  17 typedef int (*libexec_procclearfunc_t)(struct exec_info *execi);
  18
  19 struct exec_info {
  20     /* Filled in by libexec caller */
  21     endpoint_t  proc_e;                 /* Process endpoint */
  22     char *hdr;                          /* Header or full image */
  23     size_t hdr_len;                     /* Size of hdr */
  24     vir_bytes frame_len;                /* Stack size */
  25     char progname[PROC_NAME_LEN];       /* Program name */
  26     uid_t new_uid;                      /* Process UID after exec */
  27     gid_t new_gid;                      /* Process GID after exec */
  28     int allow_setuid;                   /* Allow set{u,g}id execution? */
  29     vir_bytes stack_size;               /* Desired stack size */
  30     vir_bytes load_offset;              /* Desired load offset */
  31     off_t filesize;                     /* How big is the file */
  32
  33     /* Callback pointers for use by libexec */
  34     libexec_loadfunc_t copymem;         /* Copy callback */
  35     libexec_clearfunc_t clearmem;       /* Clear callback */
  36     libexec_allocfunc_t allocmem_prealloc; /* Alloc callback */
  37     libexec_allocfunc_t allocmem_ondemand; /* Alloc callback */
  38     libexec_procclearfunc_t clearproc;  /* Clear process callback */
  39     void *opaque;                       /* Callback data */
  40
  41     /* Filled in by libexec load function */
  42     vir_bytes load_base;                /* Where executable is loaded */
  43     vir_bytes pc;                       /* Entry point of exec file */
  44     vir_bytes stack_high;               /* High stack addr */
  45 };
  46
  47 int elf_has_interpreter(char *exec_hdr, int hdr_len, char *interp, int maxsz);
  48 int elf_phdr(char *exec_hdr, int hdr_len, vir_bytes *phdr);
  49
  50 void libexec_patch_ptr(char stack[ARG_MAX], vir_bytes base);
  51 int libexec_pm_newexec(endpoint_t proc_e, struct exec_info *execi);
  52
  53 typedef int (*libexec_exec_loadfunc_t)(struct exec_info *execi);
  54 int libexec_load_elf(struct exec_info *execi);
  55
  56 int libexec_copy_memcpy(struct exec_info *execi, off_t offset, off_t vaddr, size_t len);
  57 int libexec_clear_memset(struct exec_info *execi, off_t vaddr, size_t len);
  58 int libexec_alloc_mmap_prealloc(struct exec_info *execi, off_t vaddr, size_t len);
  59 int libexec_alloc_mmap_ondemand(struct exec_info *execi, off_t vaddr, size_t len);
  60 int libexec_clearproc_vm_procctl(struct exec_info *execi);
  61 int libexec_clear_sys_memset(struct exec_info *execi, off_t vaddr, size_t len);
  62
  63 #endif /* !_LIBEXEC_H_ */