minix/lib/libexec/exec_general.c

   1 #define _SYSTEM 1
   2
   3 #include <minix/type.h>
   4 #include <minix/const.h>
   5 #include <sys/param.h>
   6 #include <assert.h>
   7 #include <unistd.h>
   8 #include <errno.h>
   9 #include <libexec.h>
  10 #include <string.h>
  11 #include <assert.h>
  12 #include <minix/ipc.h>
  13 #include <minix/com.h>
  14 #include <minix/callnr.h>
  15 #include <minix/vm.h>
  16 #include <minix/ipc.h>
  17 #include <minix/syslib.h>
  18 #include <sys/mman.h>
  19 #include <machine/elf.h>
  20
  21 int libexec_alloc_mmap_prealloc_junk(struct exec_info *execi, vir_bytes vaddr, size_t len)
  22 {
  23         if(minix_mmap_for(execi->proc_e, (void *) vaddr, len,
  24                 PROT_READ|PROT_WRITE|PROT_EXEC,
  25                 MAP_ANON|MAP_PREALLOC|MAP_UNINITIALIZED|MAP_FIXED, -1, 0) == MAP_FAILED) {
  26                 return ENOMEM;
  27         }
  28
  29         return OK;
  30 }
  31
  32 int libexec_alloc_mmap_prealloc_cleared(struct exec_info *execi, vir_bytes vaddr, size_t len)
  33 {
  34         if(minix_mmap_for(execi->proc_e, (void *) vaddr, len,
  35                 PROT_READ|PROT_WRITE|PROT_EXEC,
  36                 MAP_ANON|MAP_PREALLOC|MAP_FIXED, -1, 0) == MAP_FAILED) {
  37                 return ENOMEM;
  38         }
  39
  40         return OK;
  41 }
  42
  43 int libexec_alloc_mmap_ondemand(struct exec_info *execi, vir_bytes vaddr, size_t len)
  44 {
  45         if(minix_mmap_for(execi->proc_e, (void *) vaddr, len,
  46                 PROT_READ|PROT_WRITE|PROT_EXEC,
  47                 MAP_ANON|MAP_FIXED, -1, 0) == MAP_FAILED) {
  48                 return ENOMEM;
  49         }
  50
  51         return OK;
  52 }
  53
  54 int libexec_clearproc_vm_procctl(struct exec_info *execi)
  55 {
  56         return vm_procctl_clear(execi->proc_e);
  57 }
  58
  59 int libexec_clear_sys_memset(struct exec_info *execi, vir_bytes vaddr, size_t len)
  60 {
  61         return sys_memset(execi->proc_e, 0, vaddr, len);
  62 }
  63
  64 int libexec_copy_memcpy(struct exec_info *execi,
  65         off_t off, vir_bytes vaddr, size_t len)
  66 {
  67         assert(off + len <= execi->hdr_len);
  68         memcpy((char *) vaddr, (char *) execi->hdr + off, len);
  69         return OK;
  70 }
  71
  72 int libexec_clear_memset(struct exec_info *execi, vir_bytes vaddr, size_t len)
  73 {
  74         memset((char *) vaddr, 0, len);
  75         return OK;
  76 }
  77
  78 int libexec_pm_newexec(endpoint_t proc_e, struct exec_info *e)
  79 {
  80   int r;
  81   message m;
  82
  83   memset(&m, 0, sizeof(m));
  84   m.m_type = PM_EXEC_NEW;
  85   m.m_lexec_pm_exec_new.endpt = proc_e;
  86   m.m_lexec_pm_exec_new.ptr = (vir_bytes)e;
  87   if ((r = ipc_sendrec(PM_PROC_NR, &m)) != OK) return(r);
  88
  89   e->allow_setuid = !!m.m_pm_lexec_exec_new.suid;
  90
  91   return(m.m_type);
  92 }