From 1c02b2a55e4a455f9e854278dd658dc826b4b169 Mon Sep 17 00:00:00 2001
From: Mark Kettenis <kettenis@gnu.org>
Date: Sun, 16 Jan 2005 21:53:35 +0000
Subject: * amd64fbsd-tdep.c: Update copyright year.  Include "gdb_assert.h"
 and "bsd-uthread.h". (amd64fbsd_jmp_buf_reg_offset): New variable.
 (amd64fbsd_supply_uthread, amd64fbsd_collect_uthread): New functions.
 (amd64fbsd_init_abi): Set supply_uthread and collect_uthread. *
 i386fbsd-tdep.c: Fix typo. * Makefile.in (amd64fbsd-tdep.o): Update
 dependencies. * config/i386/fbsd64.mt (TDEPFILES): Add bsd-uthread.o.

---
 gdb/amd64fbsd-tdep.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 69 insertions(+), 1 deletion(-)

(limited to 'gdb/amd64fbsd-tdep.c')

diff --git a/gdb/amd64fbsd-tdep.c b/gdb/amd64fbsd-tdep.c
index e4e02ab..7d32894 100644
--- a/gdb/amd64fbsd-tdep.c
+++ b/gdb/amd64fbsd-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for FreeBSD/amd64.
 
-   Copyright 2003, 2004 Free Software Foundation, Inc.
+   Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -26,9 +26,11 @@
 #include "regcache.h"
 #include "osabi.h"
 
+#include "gdb_assert.h"
 #include "gdb_string.h"
 
 #include "amd64-tdep.h"
+#include "bsd-uthread.h"
 #include "solib-svr4.h"
 
 /* Support for signal handlers.  */
@@ -118,6 +120,68 @@ int amd64fbsd_sc_reg_offset[] =
   -1				/* %gs */
 };
 
+/* 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)
+{
+  char 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)
+{
+  char 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);
+	}
+    }
+}
+
 void
 amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
@@ -138,6 +202,10 @@ amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   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);
-- 
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