X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdb%2Famd64fbsd-tdep.c;h=18ef0473e344421d00859869ff3637b85e1b59b9;hb=91158a569dc571a9916dfad98c6c95ce789ad18d;hp=6814dd97e96fd015d1a1f283ab96b61521da072e;hpb=af2336475251b043c1dea6cdc557ee01dde2948b;p=binutils-gdb.git

diff --git a/gdb/amd64fbsd-tdep.c b/gdb/amd64fbsd-tdep.c
index 6814dd97e96..18ef0473e34 100644
--- a/gdb/amd64fbsd-tdep.c
+++ b/gdb/amd64fbsd-tdep.c
@@ -1,12 +1,13 @@
 /* Target-dependent code for FreeBSD/amd64.
 
-   Copyright 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010
+   Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -15,9 +16,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
 #include "arch-utils.h"
@@ -26,24 +25,27 @@
 #include "regcache.h"
 #include "osabi.h"
 
+#include "gdb_assert.h"
 #include "gdb_string.h"
 
-#include "x86-64-tdep.h"
+#include "amd64-tdep.h"
+#include "bsd-uthread.h"
+#include "solib-svr4.h"
 
 /* Support for signal handlers.  */
 
-/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
-   routine, return the address of the associated sigcontext structure.  */
+/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
+   address of the associated sigcontext structure.  */
 
 static CORE_ADDR
-amd64fbsd_sigcontext_addr (struct frame_info *next_frame)
+amd64fbsd_sigcontext_addr (struct frame_info *this_frame)
 {
   CORE_ADDR sp;
 
   /* The `struct sigcontext' (which really is an `ucontext_t' on
      FreeBSD/amd64) lives at a fixed offset in the signal frame.  See
      <machine/sigframe.h>.  */
-  sp = frame_unwind_register_unsigned (next_frame, X86_64_RSP_REGNUM);
+  sp = frame_unwind_register_unsigned (this_frame, AMD64_RSP_REGNUM);
   return sp + 16;
 }
 
@@ -85,8 +87,8 @@ static int amd64fbsd_r_reg_offset[] =
 };
 
 /* Location of the signal trampoline.  */
-CORE_ADDR amd64fbsd_sigtramp_start = 0x7fffffffffc0;
-CORE_ADDR amd64fbsd_sigtramp_end = 0x7fffffffffe0;
+CORE_ADDR amd64fbsd_sigtramp_start_addr = 0x7fffffffffc0ULL;
+CORE_ADDR amd64fbsd_sigtramp_end_addr = 0x7fffffffffe0ULL;
 
 /* From <machine/signal.h>.  */
 int amd64fbsd_sc_reg_offset[] =
@@ -117,7 +119,69 @@ int amd64fbsd_sc_reg_offset[] =
   -1				/* %gs */
 };
 
-void
+/* From /usr/src/lib/libc/amd64/gen/_setjmp.S.  */
+static int amd64fbsd_jmp_buf_reg_offset[] =
+{
+  -1,				/* %rax */
+  1 * 8,			/* %rbx */
+  -1,				/* %rcx */
+  -1,				/* %rdx */
+  -1,				/* %rsi */
+  -1,				/* %rdi */
+  3 * 8,			/* %rbp */
+  2 * 8,			/* %rsp */
+  -1,				/* %r8 ... */
+  -1,
+  -1,
+  -1,				/* ... %r11 */
+  4 * 8,			/* %r12 ... */
+  5 * 8,
+  6 * 8,
+  7 * 8,			/* ... %r15 */
+  0 * 8				/* %rip */
+};
+
+static void
+amd64fbsd_supply_uthread (struct regcache *regcache,
+			  int regnum, CORE_ADDR addr)
+{
+  gdb_byte buf[8];
+  int i;
+
+  gdb_assert (regnum >= -1);
+
+  for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++)
+    {
+      if (amd64fbsd_jmp_buf_reg_offset[i] != -1
+	  && (regnum == -1 || regnum == i))
+	{
+	  read_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8);
+	  regcache_raw_supply (regcache, i, buf);
+	}
+    }
+}
+
+static void
+amd64fbsd_collect_uthread (const struct regcache *regcache,
+			   int regnum, CORE_ADDR addr)
+{
+  gdb_byte buf[8];
+  int i;
+
+  gdb_assert (regnum >= -1);
+
+  for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++)
+    {
+      if (amd64fbsd_jmp_buf_reg_offset[i] != -1
+	  && (regnum == -1 || regnum == i))
+	{
+	  regcache_raw_collect (regcache, i, buf);
+	  write_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8);
+	}
+    }
+}
+
+static void
 amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
@@ -129,13 +193,21 @@ amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   tdep->gregset_num_regs = ARRAY_SIZE (amd64fbsd_r_reg_offset);
   tdep->sizeof_gregset = 22 * 8;
 
-  x86_64_init_abi (info, gdbarch);
+  amd64_init_abi (info, gdbarch);
 
-  tdep->sigtramp_start = amd64fbsd_sigtramp_start;
-  tdep->sigtramp_end = amd64fbsd_sigtramp_end;
+  tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr;
+  tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr;
   tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
   tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
   tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset);
+
+  /* FreeBSD provides a user-level threads implementation.  */
+  bsd_uthread_set_supply_uthread (gdbarch, amd64fbsd_supply_uthread);
+  bsd_uthread_set_collect_uthread (gdbarch, amd64fbsd_collect_uthread);
+
+  /* FreeBSD uses SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_lp64_fetch_link_map_offsets);
 }