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