* gdb.dwarf2/dup-psym.exp: Use prepare_for_testing_full.

[deliverable/binutils-gdb.git] / gdb / amd64-linux-nat.c

diff --git a/gdb/amd64-linux-nat.c b/gdb/amd64-linux-nat.c
index 23eadbd79c64b3e9336377e21daa2d49dda6ea72..01982acf17c26fd840eeafcc281db0ec9a429c5c 100644 (file)
--- a/gdb/amd64-linux-nat.c
+++ b/gdb/amd64-linux-nat.c
@@ -34,6 +34,7 @@
 #include <sys/debugreg.h>
 #include <sys/syscall.h>
 #include <sys/procfs.h>
+#include <sys/user.h>
 #include <asm/prctl.h>
 /* FIXME ezannoni-2003-07-09: we need <sys/reg.h> to be included after
    <asm/ptrace.h> because the latter redefines FS and GS for no apparent
@@ -479,10 +480,39 @@ ps_get_thread_area (const struct ps_prochandle *ph,
       switch (idx)
        {
        case FS:
+#ifdef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE
+           {
+             /* PTRACE_ARCH_PRCTL is obsolete since 2.6.25, where the
+                fs_base and gs_base fields of user_regs_struct can be
+                used directly.  */
+             unsigned long fs;
+             errno = 0;
+             fs = ptrace (PTRACE_PEEKUSER, lwpid,
+                          offsetof (struct user_regs_struct, fs_base), 0);
+             if (errno == 0)
+               {
+                 *base = (void *) fs;
+                 return PS_OK;
+               }
+           }
+#endif
          if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
            return PS_OK;
          break;
        case GS:
+#ifdef HAVE_STRUCT_USER_REGS_STRUCT_GS_BASE
+           {
+             unsigned long gs;
+             errno = 0;
+             gs = ptrace (PTRACE_PEEKUSER, lwpid,
+                          offsetof (struct user_regs_struct, gs_base), 0);
+             if (errno == 0)
+               {
+                 *base = (void *) gs;
+                 return PS_OK;
+               }
+           }
+#endif
          if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
            return PS_OK;
          break;