PR 17819: Fix --build-id=tree when using --compress-debug-sections.

[deliverable/binutils-gdb.git] / gdb / amd64fbsd-nat.c

diff --git a/gdb/amd64fbsd-nat.c b/gdb/amd64fbsd-nat.c
index b1b261c19610d5424f93448fa0054af4e6cad480..4745b4426e1aeda48e3ae7dc9cc5fc1f6fb12e29 100644 (file)
--- a/gdb/amd64fbsd-nat.c
+++ b/gdb/amd64fbsd-nat.c
@@ -151,6 +151,50 @@ amd64fbsd_mourn_inferior (struct target_ops *ops)
   super_mourn_inferior (ops);
 }
 
+/* Implement the to_read_description method.  */
+
+static const struct target_desc *
+amd64fbsd_read_description (struct target_ops *ops)
+{
+#ifdef PT_GETXSTATE_INFO
+  static int xsave_probed;
+  static uint64_t xcr0;
+#endif
+  struct reg regs;
+  int is64;
+
+  if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
+             (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+    perror_with_name (_("Couldn't get registers"));
+  is64 = (regs.r_cs == GSEL (GUCODE_SEL, SEL_UPL));
+#ifdef PT_GETXSTATE_INFO
+  if (!xsave_probed)
+    {
+      struct ptrace_xstate_info info;
+
+      if (ptrace (PT_GETXSTATE_INFO, ptid_get_pid (inferior_ptid),
+                 (PTRACE_TYPE_ARG3) &info, sizeof (info)) == 0)
+       {
+         amd64bsd_xsave_len = info.xsave_len;
+         xcr0 = info.xsave_mask;
+       }
+      xsave_probed = 1;
+    }
+
+  if (amd64bsd_xsave_len != 0)
+    {
+      if (is64)
+       return amd64_target_description (xcr0);
+      else
+       return i386_target_description (xcr0);
+    }
+#endif
+  if (is64)
+    return tdesc_amd64;
+  else
+    return tdesc_i386;
+}
+
 /* Provide a prototype to silence -Wmissing-prototypes.  */
 void _initialize_amd64fbsd_nat (void);
 
@@ -181,10 +225,9 @@ _initialize_amd64fbsd_nat (void)
 
   super_mourn_inferior = t->to_mourn_inferior;
   t->to_mourn_inferior = amd64fbsd_mourn_inferior;
+  t->to_read_description = amd64fbsd_read_description;
 
-  t->to_pid_to_exec_file = fbsd_pid_to_exec_file;
-  t->to_find_memory_regions = fbsd_find_memory_regions;
-  add_target (t);
+  fbsd_nat_add_target (t);
 
   /* Support debugging kernel virtual memory images.  */
   bsd_kvm_add_target (amd64fbsd_supply_pcb);