/* Target-dependent code for FreeBSD/i386.
- Copyright 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
+ 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,
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"
+#include "gdbcore.h"
#include "osabi.h"
+#include "regcache.h"
+
+#include "gdb_assert.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
+#include "bsd-uthread.h"
#include "solib-svr4.h"
/* FreeBSD 3.0-RELEASE or later. */
CORE_ADDR i386fbsd_sigtramp_end_addr = 0xbfbfdff0;
/* From <machine/signal.h>. */
-static int i386fbsd_sc_reg_offset[] =
+int i386fbsd_sc_reg_offset[] =
{
8 + 14 * 4, /* %eax */
8 + 13 * 4, /* %ecx */
8 + 16 * 4 /* %gs */
};
+/* From /usr/src/lib/libc/i386/gen/_setjmp.S. */
+static int i386fbsd_jmp_buf_reg_offset[] =
+{
+ -1, /* %eax */
+ -1, /* %ecx */
+ -1, /* %edx */
+ 1 * 4, /* %ebx */
+ 2 * 4, /* %esp */
+ 3 * 4, /* %ebp */
+ 4 * 4, /* %esi */
+ 5 * 4, /* %edi */
+ 0 * 4 /* %eip */
+};
+
+static void
+i386fbsd_supply_uthread (struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ char buf[4];
+ int i;
+
+ gdb_assert (regnum >= -1);
+
+ for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
+ {
+ if (i386fbsd_jmp_buf_reg_offset[i] != -1
+ && (regnum == -1 || regnum == i))
+ {
+ read_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
+ regcache_raw_supply (regcache, i, buf);
+ }
+ }
+}
+
+static void
+i386fbsd_collect_uthread (const struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ char buf[4];
+ int i;
+
+ gdb_assert (regnum >= -1);
+
+ for (i = 0; i < ARRAY_SIZE (i386fbsd_jmp_buf_reg_offset); i++)
+ {
+ if (i386fbsd_jmp_buf_reg_offset[i] != -1
+ && (regnum == -1 || regnum == i))
+ {
+ regcache_raw_collect (regcache, i, buf);
+ write_memory (addr + i386fbsd_jmp_buf_reg_offset[i], buf, 4);
+ }
+ }
+}
+
static void
i386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
/* FreeBSD has a more complete `struct sigcontext'. */
tdep->sc_reg_offset = i386fbsd_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (i386fbsd_sc_reg_offset);
+
+ /* FreeBSD provides a user-level threads implementation. */
+ bsd_uthread_set_supply_uthread (gdbarch, i386fbsd_supply_uthread);
+ bsd_uthread_set_collect_uthread (gdbarch, i386fbsd_collect_uthread);
}
static void
i386_elf_init_abi (info, gdbarch);
/* FreeBSD ELF uses SVR4-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, generic_in_solib_call_trampoline);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}