/* Target-dependent code for i386 BSD's.
- Copyright 2001, 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 2001-2014 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 "frame.h"
#include "gdbcore.h"
#include "regcache.h"
+#include "osabi.h"
#include "i386-tdep.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 FRAME is for a BSD sigtramp routine, return the address of
- the associated sigcontext structure.
-
- Note: This function is used for Solaris 2 too, so don't make it
- static. */
-
-CORE_ADDR
-i386bsd_sigcontext_addr (struct frame_info *frame)
-{
- if (frame->next)
- /* If this isn't the top frame, the next frame must be for the
- signal handler itself. A pointer to the sigcontext structure
- is passed as the third argument to the signal handler. */
- return read_memory_unsigned_integer (frame->next->frame + 16, 4);
-
- /* This is the top frame. We'll have to find the address of the
- sigcontext structure by looking at the stack pointer. */
- return read_memory_unsigned_integer (read_register (SP_REGNUM) + 8, 4);
-}
-
-/* Return the start address of the sigtramp routine. */
+/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
+ address of the associated sigcontext structure. */
-CORE_ADDR
-i386bsd_sigtramp_start (CORE_ADDR pc)
+static CORE_ADDR
+i386bsd_sigcontext_addr (struct frame_info *this_frame)
{
- return gdbarch_tdep (current_gdbarch)->sigtramp_start;
-}
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[4];
+ CORE_ADDR sp;
-/* 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_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 */
+};
-static void
+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);
-
- /* 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;
-}
-
-/* NetBSD 1.0 or later. */
-
-/* From <machine/signal.h>. */
-int i386nbsd_sc_pc_offset = 44;
-
-static void
-i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* Obviously NetBSD is BSD-based. */
- i386bsd_init_abi (info, gdbarch);
-
- /* NetBSD uses -freg-struct-return by default. */
- tdep->struct_return = reg_struct_return;
-
- /* NetBSD uses a different memory layout. */
- tdep->sigtramp_start = 0xbfbfdf20;
- tdep->sigtramp_end = 0xbfbfdff0;
-
- /* NetBSD has a `struct sigcontext' that's different from the
- origional 4.3 BSD. */
- tdep->sc_pc_offset = i386nbsd_sc_pc_offset;
-}
-
-/* NetBSD ELF. */
-static void
-i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* It's still NetBSD. */
- i386nbsd_init_abi (info, gdbarch);
-
- /* But ELF-based. */
- i386_elf_init_abi (info, gdbarch);
-
- /* NetBSD ELF uses SVR4-style shared libraries. */
- set_gdbarch_in_solib_call_trampoline (gdbarch,
- generic_in_solib_call_trampoline);
-
- /* NetBSD ELF uses -fpcc-struct-return by default. */
- tdep->struct_return = pcc_struct_return;
-
- /* We support the SSE registers on NetBSD ELF. */
- tdep->num_xmm_regs = I386_NUM_XREGS - 1;
- set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I386_NUM_FREGS
- + I386_NUM_XREGS);
-}
-
-/* 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;
-
-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_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, GDB_OSABI_NETBSD_AOUT,
- i386nbsd_init_abi);
- gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_ELF,
- i386nbsdelf_init_abi);
- gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_FREEBSD_AOUT,
- i386fbsdaout_init_abi);
- gdbarch_register_osabi (bfd_arch_i386, 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 / platform / upstream / binutils.git / blobdiff