granicus.if.org Git - strace/blob - ldt.c

   1 #include "defs.h"
   2
   3 #if defined I386 || defined X86_64 || defined X32
   4
   5 # include <asm/ldt.h>
   6
   7 void
   8 print_user_desc(struct tcb *tcp, long addr)
   9 {
  10         struct user_desc desc;
  11
  12         if (umove(tcp, addr, &desc) < 0) {
  13                 tprintf("%lx", addr);
  14                 return;
  15         }
  16
  17         if (!verbose(tcp)) {
  18                 tprintf("{entry_number:%d, ...}", desc.entry_number);
  19                 return;
  20         }
  21
  22         tprintf("{entry_number:%d, "
  23                 "base_addr:%#08x, "
  24                 "limit:%d, "
  25                 "seg_32bit:%d, "
  26                 "contents:%d, "
  27                 "read_exec_only:%d, "
  28                 "limit_in_pages:%d, "
  29                 "seg_not_present:%d, "
  30                 "useable:%d}",
  31                 desc.entry_number,
  32                 desc.base_addr,
  33                 desc.limit,
  34                 desc.seg_32bit,
  35                 desc.contents,
  36                 desc.read_exec_only,
  37                 desc.limit_in_pages,
  38                 desc.seg_not_present,
  39                 desc.useable);
  40 }
  41
  42 SYS_FUNC(modify_ldt)
  43 {
  44         if (entering(tcp)) {
  45                 tprintf("%ld, ", tcp->u_arg[0]);
  46                 if (tcp->u_arg[1] == 0
  47                     || tcp->u_arg[2] != sizeof(struct user_desc)) {
  48                         tprintf("%lx", tcp->u_arg[1]);
  49                 } else {
  50                         print_user_desc(tcp, tcp->u_arg[1]);
  51                 }
  52                 tprintf(", %lu", tcp->u_arg[2]);
  53         }
  54         return 0;
  55 }
  56
  57 SYS_FUNC(set_thread_area)
  58 {
  59         if (entering(tcp)) {
  60                 print_user_desc(tcp, tcp->u_arg[0]);
  61         } else {
  62                 struct user_desc desc;
  63
  64                 if (syserror(tcp) || umove(tcp, tcp->u_arg[0], &desc) < 0) {
  65                         /* returned entry_number is not available */
  66                 } else {
  67                         static char outstr[32];
  68
  69                         sprintf(outstr, "entry_number:%d", desc.entry_number);
  70                         tcp->auxstr = outstr;
  71                         return RVAL_STR;
  72                 }
  73         }
  74         return 0;
  75 }
  76
  77 SYS_FUNC(get_thread_area)
  78 {
  79         if (exiting(tcp)) {
  80                 if (syserror(tcp))
  81                         tprintf("%lx", tcp->u_arg[0]);
  82                 else
  83                         print_user_desc(tcp, tcp->u_arg[0]);
  84         }
  85         return 0;
  86 }
  87
  88 #endif /* I386 || X86_64 || X32 */
  89
  90 #if defined(M68K) || defined(MIPS)
  91 SYS_FUNC(set_thread_area)
  92 {
  93         if (entering(tcp))
  94                 tprintf("%#lx", tcp->u_arg[0]);
  95         return 0;
  96
  97 }
  98 #endif
  99
 100 #if defined(M68K)
 101 SYS_FUNC(get_thread_area)
 102 {
 103         return RVAL_HEX;
 104 }
 105 #endif