Move gdbserver tdesc header funcs to c file

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

diff --git a/gdb/gnu-nat.c b/gdb/gnu-nat.c
index 2ae20318f96563560a73c9fcfb42f9941d9569b7..8271565a042b9ea247daa1e27f3d4899acb14aa2 100644 (file)
--- a/gdb/gnu-nat.c
+++ b/gdb/gnu-nat.c
@@ -1,5 +1,5 @@
 /* Interface GDB to the GNU Hurd.
-   Copyright (C) 1992-2017 Free Software Foundation, Inc.
+   Copyright (C) 1992-2018 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -52,6 +52,8 @@ extern "C"
 #include <setjmp.h>
 #include <signal.h>
 #include <sys/ptrace.h>
+#include <elf.h>
+#include <link.h>
 
 #include "inferior.h"
 #include "symtab.h"
@@ -2253,7 +2255,7 @@ gnu_attach (struct target_ops *ops, const char *args, int from_tty)
    previously attached.  It *might* work if the program was
    started via fork.  */
 static void
-gnu_detach (struct target_ops *ops, const char *args, int from_tty)
+gnu_detach (struct target_ops *ops, inferior *inf, int from_tty)
 {
   int pid;
 
@@ -2541,6 +2543,60 @@ gnu_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
     }
 }
 
+/* GNU does not have auxv, but we can at least fake the AT_ENTRY entry for PIE
+   binaries.  */
+static enum target_xfer_status
+gnu_xfer_auxv (gdb_byte *readbuf, const gdb_byte *writebuf,
+              CORE_ADDR memaddr, ULONGEST len, ULONGEST *xfered_len)
+{
+  task_t task = (gnu_current_inf
+                ? (gnu_current_inf->task
+                   ? gnu_current_inf->task->port : 0)
+                : 0);
+  process_t proc;
+  int res;
+  kern_return_t err;
+  vm_address_t entry;
+  ElfW(auxv_t) auxv[2];
+
+  if (task == MACH_PORT_NULL)
+    return TARGET_XFER_E_IO;
+  if (writebuf != NULL)
+    return TARGET_XFER_E_IO;
+
+  if (memaddr == sizeof (auxv))
+    return TARGET_XFER_EOF;
+  if (memaddr > sizeof (auxv))
+    return TARGET_XFER_E_IO;
+
+  err = proc_task2proc (proc_server, task, &proc);
+  if (err != 0)
+    return TARGET_XFER_E_IO;
+
+  /* Get entry from proc server.  */
+  err = proc_get_entry (proc, &entry);
+  if (err != 0)
+    return TARGET_XFER_E_IO;
+
+  /* Fake auxv entry.  */
+  auxv[0].a_type = AT_ENTRY;
+  auxv[0].a_un.a_val = entry;
+  auxv[1].a_type = AT_NULL;
+  auxv[1].a_un.a_val = 0;
+
+  inf_debug (gnu_current_inf, "reading auxv %s[%s] --> %s",
+            paddress (target_gdbarch (), memaddr), pulongest (len),
+            host_address_to_string (readbuf));
+
+  if (memaddr + len > sizeof (auxv))
+    len = sizeof (auxv) - memaddr;
+
+  memcpy (readbuf, (gdb_byte *) &auxv + memaddr, len);
+  *xfered_len = len;
+
+  return TARGET_XFER_OK;
+}
+
 /* Target to_xfer_partial implementation.  */
 
 static enum target_xfer_status
@@ -2553,6 +2609,8 @@ gnu_xfer_partial (struct target_ops *ops, enum target_object object,
     {
     case TARGET_OBJECT_MEMORY:
       return gnu_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
+    case TARGET_OBJECT_AUXV:
+      return gnu_xfer_auxv (readbuf, writebuf, offset, len, xfered_len);
     default:
       return TARGET_XFER_E_IO;
     }
@@ -2742,7 +2800,7 @@ show_thread_default_cmd (const char *args, int from_tty)
 }
 
 static int
-parse_int_arg (char *args, char *cmd_prefix)
+parse_int_arg (const char *args, char *cmd_prefix)
 {
   if (args)
     {
@@ -2757,7 +2815,7 @@ parse_int_arg (char *args, char *cmd_prefix)
 }
 
 static int
-_parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix)
+_parse_bool_arg (const char *args, char *t_val, char *f_val, char *cmd_prefix)
 {
   if (!args || strcmp (args, t_val) == 0)
     return 1;
@@ -2818,13 +2876,13 @@ set_task_pause_cmd (int arg, int from_tty)
 }
 
 static void
-set_task_pause_cmd (char *args, int from_tty)
+set_task_pause_cmd (const char *args, int from_tty)
 {
   set_task_pause_cmd (parse_bool_arg (args, "set task pause"), from_tty);
 }
 
 static void
-show_task_pause_cmd (char *args, int from_tty)
+show_task_pause_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2836,14 +2894,14 @@ show_task_pause_cmd (char *args, int from_tty)
 }
 
 static void
-set_task_detach_sc_cmd (char *args, int from_tty)
+set_task_detach_sc_cmd (const char *args, int from_tty)
 {
   cur_inf ()->detach_sc = parse_int_arg (args,
                                         "set task detach-suspend-count");
 }
 
 static void
-show_task_detach_sc_cmd (char *args, int from_tty)
+show_task_detach_sc_cmd (const char *args, int from_tty)
 {
   check_empty (args, "show task detach-suspend-count");
   printf_unfiltered ("The inferior task will be left with a "
@@ -2853,7 +2911,7 @@ show_task_detach_sc_cmd (char *args, int from_tty)
 
 \f
 static void
-set_thread_default_pause_cmd (char *args, int from_tty)
+set_thread_default_pause_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2862,7 +2920,7 @@ set_thread_default_pause_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_default_pause_cmd (char *args, int from_tty)
+show_thread_default_pause_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
   int sc = inf->default_thread_pause_sc;
@@ -2874,7 +2932,7 @@ show_thread_default_pause_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_default_run_cmd (char *args, int from_tty)
+set_thread_default_run_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2883,7 +2941,7 @@ set_thread_default_run_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_default_run_cmd (char *args, int from_tty)
+show_thread_default_run_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2893,14 +2951,14 @@ show_thread_default_run_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_default_detach_sc_cmd (char *args, int from_tty)
+set_thread_default_detach_sc_cmd (const char *args, int from_tty)
 {
   cur_inf ()->default_thread_detach_sc =
     parse_int_arg (args, "set thread default detach-suspend-count");
 }
 
 static void
-show_thread_default_detach_sc_cmd (char *args, int from_tty)
+show_thread_default_detach_sc_cmd (const char *args, int from_tty)
 {
   check_empty (args, "show thread default detach-suspend-count");
   printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
@@ -2946,7 +3004,7 @@ steal_exc_port (struct proc *proc, mach_port_t name)
 }
 
 static void
-set_task_exc_port_cmd (char *args, int from_tty)
+set_task_exc_port_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2956,13 +3014,13 @@ set_task_exc_port_cmd (char *args, int from_tty)
 }
 
 static void
-set_stopped_cmd (char *args, int from_tty)
+set_stopped_cmd (const char *args, int from_tty)
 {
   cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped");
 }
 
 static void
-show_stopped_cmd (char *args, int from_tty)
+show_stopped_cmd (const char *args, int from_tty)
 {
   struct inf *inf = active_inf ();
 
@@ -2972,7 +3030,7 @@ show_stopped_cmd (char *args, int from_tty)
 }
 
 static void
-set_sig_thread_cmd (char *args, int from_tty)
+set_sig_thread_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2990,7 +3048,7 @@ set_sig_thread_cmd (char *args, int from_tty)
 }
 
 static void
-show_sig_thread_cmd (char *args, int from_tty)
+show_sig_thread_cmd (const char *args, int from_tty)
 {
   struct inf *inf = active_inf ();
 
@@ -3016,13 +3074,13 @@ set_signals_cmd (int arg, int from_tty)
 }
 
 static void
-set_signals_cmd (char *args, int from_tty)
+set_signals_cmd (const char *args, int from_tty)
 {
   set_signals_cmd(parse_bool_arg (args, "set signals"), from_tty);
 }
 
 static void
-show_signals_cmd (char *args, int from_tty)
+show_signals_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -3045,13 +3103,13 @@ set_exceptions_cmd (int arg, int from_tty)
 }
 
 static void
-set_exceptions_cmd (char *args, int from_tty)
+set_exceptions_cmd (const char *args, int from_tty)
 {
   set_exceptions_cmd (parse_bool_arg (args, "set exceptions"), from_tty);
 }
 
 static void
-show_exceptions_cmd (char *args, int from_tty)
+show_exceptions_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -3099,7 +3157,7 @@ show_task_cmd (const char *args, int from_tty)
 
 \f
 static void
-set_noninvasive_cmd (char *args, int from_tty)
+set_noninvasive_cmd (const char *args, int from_tty)
 {
   /* Invert the sense of the arg for each component.  */
   int inv_arg = parse_bool_arg (args, "set noninvasive") ? 0 : 1;
@@ -3145,31 +3203,31 @@ info_port_rights (const char *args, mach_port_type_t only)
 }
 
 static void
-info_send_rights_cmd (char *args, int from_tty)
+info_send_rights_cmd (const char *args, int from_tty)
 {
   info_port_rights (args, MACH_PORT_TYPE_SEND);
 }
 
 static void
-info_recv_rights_cmd (char *args, int from_tty)
+info_recv_rights_cmd (const char *args, int from_tty)
 {
   info_port_rights (args, MACH_PORT_TYPE_RECEIVE);
 }
 
 static void
-info_port_sets_cmd (char *args, int from_tty)
+info_port_sets_cmd (const char *args, int from_tty)
 {
   info_port_rights (args, MACH_PORT_TYPE_PORT_SET);
 }
 
 static void
-info_dead_names_cmd (char *args, int from_tty)
+info_dead_names_cmd (const char *args, int from_tty)
 {
   info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME);
 }
 
 static void
-info_port_rights_cmd (char *args, int from_tty)
+info_port_rights_cmd (const char *args, int from_tty)
 {
   info_port_rights (args, ~0);
 }
@@ -3301,7 +3359,7 @@ This is the same as setting `task pause', `exceptions', and\n\
 
 \f
 static void
-set_thread_pause_cmd (char *args, int from_tty)
+set_thread_pause_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
   int old_sc = thread->pause_sc;
@@ -3314,7 +3372,7 @@ set_thread_pause_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_pause_cmd (char *args, int from_tty)
+show_thread_pause_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
   int sc = thread->pause_sc;
@@ -3327,7 +3385,7 @@ show_thread_pause_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_run_cmd (char *args, int from_tty)
+set_thread_run_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3335,7 +3393,7 @@ set_thread_run_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_run_cmd (char *args, int from_tty)
+show_thread_run_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3346,14 +3404,14 @@ show_thread_run_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_detach_sc_cmd (char *args, int from_tty)
+set_thread_detach_sc_cmd (const char *args, int from_tty)
 {
   cur_thread ()->detach_sc = parse_int_arg (args,
                                            "set thread detach-suspend-count");
 }
 
 static void
-show_thread_detach_sc_cmd (char *args, int from_tty)
+show_thread_detach_sc_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3365,7 +3423,7 @@ show_thread_detach_sc_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_exc_port_cmd (char *args, int from_tty)
+set_thread_exc_port_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3389,7 +3447,7 @@ show_thread_cmd (char *args, int from_tty)
 #endif
 
 static void
-thread_takeover_sc_cmd (char *args, int from_tty)
+thread_takeover_sc_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();