/* Target-dependent code for i386 BSD's.
- Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright (C) 2001-2004, 2007-2012 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"
/* Support for signal handlers. */
-/* Return whether PC is in a BSD sigtramp routine. */
-
-static int
-i386bsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
-
- return (pc >= tdep->sigtramp_start && pc < tdep->sigtramp_end);
-}
-
-/* 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
-i386bsd_sigcontext_addr (struct frame_info *next_frame)
+i386bsd_sigcontext_addr (struct frame_info *this_frame)
{
- char buf[4];
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[4];
CORE_ADDR sp;
- frame_unwind_register (next_frame, SP_REGNUM, buf);
- sp = extract_unsigned_integer (buf, 4);
-
- return read_memory_unsigned_integer (sp + 8, 4);
-}
-
-/* Return the start address of the sigtramp routine. */
-
-CORE_ADDR
-i386bsd_sigtramp_start (CORE_ADDR pc)
-{
- return gdbarch_tdep (current_gdbarch)->sigtramp_start;
-}
-
-/* Return the end address of the sigtramp routine. */
+ get_frame_register (this_frame, I386_ESP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 4, byte_order);
-CORE_ADDR
-i386bsd_sigtramp_end (CORE_ADDR pc)
-{
- return gdbarch_tdep (current_gdbarch)->sigtramp_end;
+ return read_memory_unsigned_integer (sp + 8, 4, byte_order);
}
\f
/* Support for shared libraries. */
-/* Return non-zero if we are in a shared library trampoline code stub. */
-
-int
-i386bsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
-{
- return (name && !strcmp (name, "_DYNAMIC"));
-}
-
/* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */
/* From <machine/signal.h>. */
-int i386bsd_sc_pc_offset = 20;
-int i386bsd_sc_sp_offset = 8;
+int i386bsd_sc_reg_offset[] =
+{
+ -1, /* %eax */
+ -1, /* %ecx */
+ -1, /* %edx */
+ -1, /* %ebx */
+ 8 + 0 * 4, /* %esp */
+ 8 + 1 * 4, /* %ebp */
+ -1, /* %esi */
+ -1, /* %edi */
+ 8 + 3 * 4, /* %eip */
+ 8 + 4 * 4, /* %eflags */
+ -1, /* %cs */
+ -1, /* %ss */
+ -1, /* %ds */
+ -1, /* %es */
+ -1, /* %fs */
+ -1 /* %gs */
+};
void
i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- set_gdbarch_pc_in_sigtramp (gdbarch, i386bsd_pc_in_sigtramp);
-
- /* Allow the recognition of sigtramps as a function named <sigtramp>. */
- set_gdbarch_sigtramp_start (gdbarch, i386bsd_sigtramp_start);
- set_gdbarch_sigtramp_end (gdbarch, i386bsd_sigtramp_end);
-
- /* Assume SunOS-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline (gdbarch,
- i386bsd_aout_in_solib_call_trampoline);
-
tdep->jb_pc_offset = 0;
tdep->sigtramp_start = 0xfdbfdfc0;
tdep->sigtramp_end = 0xfdbfe000;
tdep->sigcontext_addr = i386bsd_sigcontext_addr;
- tdep->sc_pc_offset = i386bsd_sc_pc_offset;
- tdep->sc_sp_offset = i386bsd_sc_sp_offset;
-}
-
-/* FreeBSD 3.0-RELEASE or later. */
-
-CORE_ADDR i386fbsd_sigtramp_start = 0xbfbfdf20;
-CORE_ADDR i386fbsd_sigtramp_end = 0xbfbfdff0;
-
-static void
-i386fbsdaout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* Obviously FreeBSD is BSD-based. */
- i386bsd_init_abi (info, gdbarch);
-
- /* FreeBSD uses -freg-struct-return by default. */
- tdep->struct_return = reg_struct_return;
-
- /* FreeBSD uses a different memory layout. */
- tdep->sigtramp_start = i386fbsd_sigtramp_start;
- tdep->sigtramp_end = i386fbsd_sigtramp_end;
-}
-
-static void
-i386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- /* It's almost identical to FreeBSD a.out. */
- i386fbsdaout_init_abi (info, gdbarch);
-
- /* Except that it uses ELF. */
- 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);
-}
-
-/* FreeBSD 4.0-RELEASE or later. */
-
-/* From <machine/signal.h>. */
-int i386fbsd4_sc_pc_offset = 76;
-int i386fbsd4_sc_sp_offset = 88;
-
-static void
-i386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* Inherit stuff from older releases. We assume that FreeBSD
- 4.0-RELEASE always uses ELF. */
- i386fbsd_init_abi (info, gdbarch);
-
- /* FreeBSD 4.0 introduced a new `struct sigcontext'. */
- tdep->sc_pc_offset = i386fbsd4_sc_pc_offset;
- tdep->sc_sp_offset = i386fbsd4_sc_sp_offset;
+ tdep->sc_reg_offset = i386bsd_sc_reg_offset;
+ tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
}
\f
return GDB_OSABI_UNKNOWN;
}
+static enum gdb_osabi
+i386bsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_AOUT;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
\f
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_i386bsd_tdep (void);
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
i386bsd_aout_osabi_sniffer);
- gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_AOUT,
- i386fbsdaout_init_abi);
- gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_FREEBSD_ELF,
- i386fbsd4_init_abi);
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
+ i386bsd_core_osabi_sniffer);
}
projects / deliverable / binutils-gdb.git / blobdiff