Don't print symbol on address 0x0

[deliverable/binutils-gdb.git] / gdb / i386-linux-nat.c

diff --git a/gdb/i386-linux-nat.c b/gdb/i386-linux-nat.c
index be2b6c9f9c95c0798b00a2e9f772da6aba5f4fb7..ff96501d4d50b9b0406b7b887244ffa04e4276ab 100644 (file)
--- a/gdb/i386-linux-nat.c
+++ b/gdb/i386-linux-nat.c
@@ -1,6 +1,6 @@
 /* Native-dependent code for GNU/Linux i386.
 
-   Copyright (C) 1999-2013 Free Software Foundation, Inc.
+   Copyright (C) 1999-2014 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -25,11 +25,11 @@
 #include "regset.h"
 #include "target.h"
 #include "linux-nat.h"
-#include "linux-btrace.h"
+#include "nat/linux-btrace.h"
 #include "btrace.h"
 
 #include "gdb_assert.h"
-#include "gdb_string.h"
+#include <string.h>
 #include "elf/common.h"
 #include <sys/uio.h>
 #include <sys/ptrace.h>
@@ -102,7 +102,7 @@ static int have_ptrace_getregset = -1;
   (I386_ST0_REGNUM <= (regno) && (regno) < I386_SSE_NUM_REGS)
 
 #define GETXSTATEREGS_SUPPLIES(regno) \
-  (I386_ST0_REGNUM <= (regno) && (regno) < I386_AVX_NUM_REGS)
+  (I386_ST0_REGNUM <= (regno) && (regno) < I386_AVX512_NUM_REGS)
 
 /* Does the current host support the GETREGS request?  */
 int have_ptrace_getregs =
@@ -148,9 +148,9 @@ fetch_register (struct regcache *regcache, int regno)
     }
 
   /* GNU/Linux LWP ID's are process ID's.  */
-  tid = TIDGET (inferior_ptid);
+  tid = ptid_get_lwp (inferior_ptid);
   if (tid == 0)
-    tid = PIDGET (inferior_ptid); /* Not a threaded program.  */
+    tid = ptid_get_pid (inferior_ptid); /* Not a threaded program.  */
 
   errno = 0;
   val = ptrace (PTRACE_PEEKUSER, tid,
@@ -176,9 +176,9 @@ store_register (const struct regcache *regcache, int regno)
     return;
 
   /* GNU/Linux LWP ID's are process ID's.  */
-  tid = TIDGET (inferior_ptid);
+  tid = ptid_get_lwp (inferior_ptid);
   if (tid == 0)
-    tid = PIDGET (inferior_ptid); /* Not a threaded program.  */
+    tid = ptid_get_pid (inferior_ptid); /* Not a threaded program.  */
 
   errno = 0;
   regcache_raw_collect (regcache, regno, &val);
@@ -514,9 +514,9 @@ i386_linux_fetch_inferior_registers (struct target_ops *ops,
     }
 
   /* GNU/Linux LWP ID's are process ID's.  */
-  tid = TIDGET (inferior_ptid);
+  tid = ptid_get_lwp (inferior_ptid);
   if (tid == 0)
-    tid = PIDGET (inferior_ptid); /* Not a threaded program.  */
+    tid = ptid_get_pid (inferior_ptid); /* Not a threaded program.  */
 
   /* Use the PTRACE_GETFPXREGS request whenever possible, since it
      transfers more registers in one system call, and we'll cache the
@@ -595,9 +595,9 @@ i386_linux_store_inferior_registers (struct target_ops *ops,
     }
 
   /* GNU/Linux LWP ID's are process ID's.  */
-  tid = TIDGET (inferior_ptid);
+  tid = ptid_get_lwp (inferior_ptid);
   if (tid == 0)
-    tid = PIDGET (inferior_ptid); /* Not a threaded program.  */
+    tid = ptid_get_pid (inferior_ptid); /* Not a threaded program.  */
 
   /* Use the PTRACE_SETFPXREGS requests whenever possible, since it
      transfers more registers in one system call.  But remember that
@@ -652,9 +652,9 @@ i386_linux_dr_get (ptid_t ptid, int regnum)
   int tid;
   unsigned long value;
 
-  tid = TIDGET (ptid);
+  tid = ptid_get_lwp (ptid);
   if (tid == 0)
-    tid = PIDGET (ptid);
+    tid = ptid_get_pid (ptid);
 
   errno = 0;
   value = ptrace (PTRACE_PEEKUSER, tid,
@@ -672,9 +672,9 @@ i386_linux_dr_set (ptid_t ptid, int regnum, unsigned long value)
 {
   int tid;
 
-  tid = TIDGET (ptid);
+  tid = ptid_get_lwp (ptid);
   if (tid == 0)
-    tid = PIDGET (ptid);
+    tid = ptid_get_pid (ptid);
 
   errno = 0;
   ptrace (PTRACE_POKEUSER, tid,
@@ -778,6 +778,8 @@ i386_linux_prepare_to_resume (struct lwp_info *lwp)
       /* See amd64_linux_prepare_to_resume for Linux kernel note on
         i386_linux_dr_set calls ordering.  */
 
+      i386_linux_dr_set (lwp->ptid, DR_CONTROL, 0);
+
       for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
        if (state->dr_ref_count[i] > 0)
          {
@@ -790,7 +792,8 @@ i386_linux_prepare_to_resume (struct lwp_info *lwp)
            clear_status = 1;
          }
 
-      i386_linux_dr_set (lwp->ptid, DR_CONTROL, state->dr_control_mirror);
+      if (state->dr_control_mirror != 0)
+       i386_linux_dr_set (lwp->ptid, DR_CONTROL, state->dr_control_mirror);
 
       lwp->arch_private->debug_registers_changed = 0;
     }
@@ -917,7 +920,7 @@ static void
 i386_linux_resume (struct target_ops *ops,
                   ptid_t ptid, int step, enum gdb_signal signal)
 {
-  int pid = PIDGET (ptid);
+  int pid = ptid_get_pid (ptid);
 
   int request;
 
@@ -982,13 +985,14 @@ i386_linux_resume (struct target_ops *ops,
     perror_with_name (("ptrace"));
 }
 
-static void (*super_post_startup_inferior) (ptid_t ptid);
+static void (*super_post_startup_inferior) (struct target_ops *self,
+                                           ptid_t ptid);
 
 static void
-i386_linux_child_post_startup_inferior (ptid_t ptid)
+i386_linux_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
 {
   i386_cleanup_dregs ();
-  super_post_startup_inferior (ptid);
+  super_post_startup_inferior (self, ptid);
 }
 
 /* Get Linux/x86 target description from running target.  */
@@ -1000,9 +1004,9 @@ i386_linux_read_description (struct target_ops *ops)
   static uint64_t xcr0;
 
   /* GNU/Linux LWP ID's are process ID's.  */
-  tid = TIDGET (inferior_ptid);
+  tid = ptid_get_lwp (inferior_ptid);
   if (tid == 0)
-    tid = PIDGET (inferior_ptid); /* Not a threaded program.  */
+    tid = ptid_get_pid (inferior_ptid); /* Not a threaded program.  */
 
 #ifdef HAVE_PTRACE_GETFPXREGS
   if (have_ptrace_getfpxregs == -1)
@@ -1041,9 +1045,21 @@ i386_linux_read_description (struct target_ops *ops)
     }
 
   /* Check the native XCR0 only if PTRACE_GETREGSET is available.  */
-  if (have_ptrace_getregset
-      && (xcr0 & I386_XSTATE_AVX_MASK) == I386_XSTATE_AVX_MASK)
-    return tdesc_i386_avx_linux;
+  if (have_ptrace_getregset)
+    {
+      switch ((xcr0 & I386_XSTATE_ALL_MASK))
+       {
+       case I386_XSTATE_MPX_AVX512_MASK:
+       case I386_XSTATE_AVX512_MASK:
+         return tdesc_i386_avx512_linux;
+       case I386_XSTATE_MPX_MASK:
+         return tdesc_i386_mpx_linux;
+       case I386_XSTATE_AVX_MASK:
+         return tdesc_i386_avx_linux;
+       default:
+         return tdesc_i386_linux;
+       }
+    }
   else
     return tdesc_i386_linux;
 }
@@ -1051,7 +1067,7 @@ i386_linux_read_description (struct target_ops *ops)
 /* Enable branch tracing.  */
 
 static struct btrace_target_info *
-i386_linux_enable_btrace (ptid_t ptid)
+i386_linux_enable_btrace (struct target_ops *self, ptid_t ptid)
 {
   struct btrace_target_info *tinfo;
   struct gdbarch *gdbarch;
@@ -1073,23 +1089,34 @@ i386_linux_enable_btrace (ptid_t ptid)
 /* Disable branch tracing.  */
 
 static void
-i386_linux_disable_btrace (struct btrace_target_info *tinfo)
+i386_linux_disable_btrace (struct target_ops *self,
+                          struct btrace_target_info *tinfo)
 {
-  int errcode = linux_disable_btrace (tinfo);
+  enum btrace_error errcode = linux_disable_btrace (tinfo);
 
-  if (errcode != 0)
-    error (_("Could not disable branch tracing: %s."), safe_strerror (errcode));
+  if (errcode != BTRACE_ERR_NONE)
+    error (_("Could not disable branch tracing."));
 }
 
 /* Teardown branch tracing.  */
 
 static void
-i386_linux_teardown_btrace (struct btrace_target_info *tinfo)
+i386_linux_teardown_btrace (struct target_ops *self,
+                           struct btrace_target_info *tinfo)
 {
   /* Ignore errors.  */
   linux_disable_btrace (tinfo);
 }
 
+static enum btrace_error
+i386_linux_read_btrace (struct target_ops *self,
+                       VEC (btrace_block_s) **data,
+                       struct btrace_target_info *btinfo,
+                       enum btrace_read_type type)
+{
+  return linux_read_btrace (data, btinfo, type);
+}
+
 /* -Wmissing-prototypes */
 extern initialize_file_ftype _initialize_i386_linux_nat;
 
@@ -1128,7 +1155,7 @@ _initialize_i386_linux_nat (void)
   t->to_enable_btrace = i386_linux_enable_btrace;
   t->to_disable_btrace = i386_linux_disable_btrace;
   t->to_teardown_btrace = i386_linux_teardown_btrace;
-  t->to_read_btrace = linux_read_btrace;
+  t->to_read_btrace = i386_linux_read_btrace;
 
   /* Register the target.  */
   linux_nat_add_target (t);