mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-25 02:53:48 +08:00
125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/* Target-dependent code for FreeBSD/Alpha.
|
||
Copyright 2001, 2002, 2003 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
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
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. */
|
||
|
||
#include "defs.h"
|
||
#include "value.h"
|
||
#include "osabi.h"
|
||
|
||
#include "alpha-tdep.h"
|
||
|
||
static int
|
||
alphafbsd_use_struct_convention (int gcc_p, struct type *type)
|
||
{
|
||
enum type_code code;
|
||
int i;
|
||
|
||
/* All aggregate types that won't fit in a register must be returned
|
||
in memory. */
|
||
if (TYPE_LENGTH (type) > ALPHA_REGISTER_SIZE)
|
||
return 1;
|
||
|
||
/* The only aggregate types that can be returned in a register are
|
||
structs and unions. Arrays must be returned in memory. */
|
||
code = TYPE_CODE (type);
|
||
if (code != TYPE_CODE_STRUCT && code != TYPE_CODE_UNION)
|
||
return 1;
|
||
|
||
/* We need to check if this struct/union is "integer" like. For
|
||
this to be true, the offset of each adressable subfield must be
|
||
zero. Note that bit fields are not addressable. */
|
||
for (i = 0; i < TYPE_NFIELDS (type); i++)
|
||
{
|
||
/* If the field bitsize is non-zero, it isn't adressable. */
|
||
if (TYPE_FIELD_BITPOS (type, i) != 0
|
||
&& TYPE_FIELD_BITSIZE (type, i) == 0)
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Support for signal handlers. */
|
||
|
||
/* Return whether PC is in a BSD sigtramp routine. */
|
||
|
||
CORE_ADDR alphafbsd_sigtramp_start = 0x11ffff68;
|
||
CORE_ADDR alphafbsd_sigtramp_end = 0x11ffffe0;
|
||
|
||
static int
|
||
alphafbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
|
||
{
|
||
return (pc >= alphafbsd_sigtramp_start && pc < alphafbsd_sigtramp_end);
|
||
}
|
||
|
||
static LONGEST
|
||
alphafbsd_sigtramp_offset (CORE_ADDR pc)
|
||
{
|
||
return pc - alphafbsd_sigtramp_start;
|
||
}
|
||
|
||
/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
|
||
routine, return the address of the associated sigcontext structure. */
|
||
|
||
static CORE_ADDR
|
||
alphafbsd_sigcontext_addr (struct frame_info *next_frame)
|
||
{
|
||
return frame_unwind_register_unsigned (next_frame, ALPHA_SP_REGNUM) + 24;
|
||
}
|
||
|
||
/* FreeBSD 5.0-RELEASE or later. */
|
||
|
||
static void
|
||
alphafbsd_init_abi (struct gdbarch_info info,
|
||
struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* Hook into the DWARF CFI frame unwinder. */
|
||
alpha_dwarf2_init_abi (info, gdbarch);
|
||
|
||
/* Hook into the MDEBUG frame unwinder. */
|
||
alpha_mdebug_init_abi (info, gdbarch);
|
||
|
||
set_gdbarch_use_struct_convention (gdbarch, alphafbsd_use_struct_convention);
|
||
|
||
set_gdbarch_pc_in_sigtramp (gdbarch, alphafbsd_pc_in_sigtramp);
|
||
|
||
tdep->dynamic_sigtramp_offset = alphafbsd_sigtramp_offset;
|
||
tdep->sigcontext_addr = alphafbsd_sigcontext_addr;
|
||
tdep->sc_pc_offset = 288;
|
||
tdep->sc_regs_offset = 24;
|
||
tdep->sc_fpregs_offset = 320;
|
||
|
||
tdep->jb_pc = 2;
|
||
tdep->jb_elt_size = 8;
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_alphafbsd_tdep (void);
|
||
|
||
void
|
||
_initialize_alphafbsd_tdep (void)
|
||
{
|
||
gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_FREEBSD_ELF,
|
||
alphafbsd_init_abi);
|
||
}
|