2004-05-24 21:00:09 +00:00
|
|
|
|
/* Target-dependent code for the Motorola 88000 series.
|
|
|
|
|
|
2007-01-09 17:59:20 +00:00
|
|
|
|
Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
|
2004-05-24 21:00:09 +00:00
|
|
|
|
|
|
|
|
|
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
|
2005-12-17 22:34:03 +00:00
|
|
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
|
|
|
Boston, MA 02110-1301, USA. */
|
2004-05-24 21:00:09 +00:00
|
|
|
|
|
|
|
|
|
#include "defs.h"
|
|
|
|
|
#include "arch-utils.h"
|
|
|
|
|
#include "dis-asm.h"
|
|
|
|
|
#include "frame.h"
|
|
|
|
|
#include "frame-base.h"
|
|
|
|
|
#include "frame-unwind.h"
|
|
|
|
|
#include "gdbcore.h"
|
|
|
|
|
#include "gdbtypes.h"
|
|
|
|
|
#include "regcache.h"
|
|
|
|
|
#include "regset.h"
|
|
|
|
|
#include "symtab.h"
|
|
|
|
|
#include "trad-frame.h"
|
|
|
|
|
#include "value.h"
|
|
|
|
|
|
|
|
|
|
#include "gdb_assert.h"
|
|
|
|
|
#include "gdb_string.h"
|
|
|
|
|
|
|
|
|
|
#include "m88k-tdep.h"
|
|
|
|
|
|
|
|
|
|
/* Fetch the instruction at PC. */
|
|
|
|
|
|
|
|
|
|
static unsigned long
|
|
|
|
|
m88k_fetch_instruction (CORE_ADDR pc)
|
|
|
|
|
{
|
|
|
|
|
return read_memory_unsigned_integer (pc, 4);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Register information. */
|
|
|
|
|
|
|
|
|
|
/* Return the name of register REGNUM. */
|
|
|
|
|
|
|
|
|
|
static const char *
|
|
|
|
|
m88k_register_name (int regnum)
|
|
|
|
|
{
|
|
|
|
|
static char *register_names[] =
|
|
|
|
|
{
|
|
|
|
|
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
|
|
|
|
|
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
|
|
|
|
|
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
|
|
|
|
|
"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
|
|
|
|
|
"epsr", "fpsr", "fpcr", "sxip", "snip", "sfip"
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
if (regnum >= 0 && regnum < ARRAY_SIZE (register_names))
|
|
|
|
|
return register_names[regnum];
|
|
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return the GDB type object for the "standard" data type of data in
|
|
|
|
|
register REGNUM. */
|
|
|
|
|
|
|
|
|
|
static struct type *
|
|
|
|
|
m88k_register_type (struct gdbarch *gdbarch, int regnum)
|
|
|
|
|
{
|
|
|
|
|
/* SXIP, SNIP, SFIP and R1 contain code addresses. */
|
|
|
|
|
if ((regnum >= M88K_SXIP_REGNUM && regnum <= M88K_SFIP_REGNUM)
|
|
|
|
|
|| regnum == M88K_R1_REGNUM)
|
|
|
|
|
return builtin_type_void_func_ptr;
|
|
|
|
|
|
|
|
|
|
/* R30 and R31 typically contains data addresses. */
|
|
|
|
|
if (regnum == M88K_R30_REGNUM || regnum == M88K_R31_REGNUM)
|
|
|
|
|
return builtin_type_void_data_ptr;
|
|
|
|
|
|
|
|
|
|
return builtin_type_int32;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
m88k_addr_bits_remove (CORE_ADDR addr)
|
|
|
|
|
{
|
|
|
|
|
/* All instructures are 4-byte aligned. The lower 2 bits of SXIP,
|
|
|
|
|
SNIP and SFIP are used for special purposes: bit 0 is the
|
|
|
|
|
exception bit and bit 1 is the valid bit. */
|
|
|
|
|
return addr & ~0x3;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Use the program counter to determine the contents and size of a
|
|
|
|
|
breakpoint instruction. Return a pointer to a string of bytes that
|
|
|
|
|
encode a breakpoint instruction, store the length of the string in
|
|
|
|
|
*LEN and optionally adjust *PC to point to the correct memory
|
|
|
|
|
location for inserting the breakpoint. */
|
|
|
|
|
|
2005-05-14 11:50:36 +00:00
|
|
|
|
static const gdb_byte *
|
2004-05-24 21:00:09 +00:00
|
|
|
|
m88k_breakpoint_from_pc (CORE_ADDR *pc, int *len)
|
|
|
|
|
{
|
|
|
|
|
/* tb 0,r0,511 */
|
2005-05-14 11:50:36 +00:00
|
|
|
|
static gdb_byte break_insn[] = { 0xf0, 0x00, 0xd1, 0xff };
|
2004-05-24 21:00:09 +00:00
|
|
|
|
|
|
|
|
|
*len = sizeof (break_insn);
|
|
|
|
|
return break_insn;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
m88k_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR pc;
|
|
|
|
|
|
|
|
|
|
pc = frame_unwind_register_unsigned (next_frame, M88K_SXIP_REGNUM);
|
|
|
|
|
return m88k_addr_bits_remove (pc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
m88k_write_pc (CORE_ADDR pc, ptid_t ptid)
|
|
|
|
|
{
|
|
|
|
|
/* According to the MC88100 RISC Microprocessor User's Manual,
|
|
|
|
|
section 6.4.3.1.2:
|
|
|
|
|
|
|
|
|
|
"... can be made to return to a particular instruction by placing
|
|
|
|
|
a valid instruction address in the SNIP and the next sequential
|
|
|
|
|
instruction address in the SFIP (with V bits set and E bits
|
|
|
|
|
clear). The rte resumes execution at the instruction pointed to
|
|
|
|
|
by the SNIP, then the SFIP."
|
|
|
|
|
|
|
|
|
|
The E bit is the least significant bit (bit 0). The V (valid)
|
|
|
|
|
bit is bit 1. This is why we logical or 2 into the values we are
|
|
|
|
|
writing below. It turns out that SXIP plays no role when
|
|
|
|
|
returning from an exception so nothing special has to be done
|
|
|
|
|
with it. We could even (presumably) give it a totally bogus
|
|
|
|
|
value. */
|
|
|
|
|
|
|
|
|
|
write_register_pid (M88K_SXIP_REGNUM, pc, ptid);
|
|
|
|
|
write_register_pid (M88K_SNIP_REGNUM, pc | 2, ptid);
|
|
|
|
|
write_register_pid (M88K_SFIP_REGNUM, (pc + 4) | 2, ptid);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* The functions on this page are intended to be used to classify
|
|
|
|
|
function arguments. */
|
|
|
|
|
|
|
|
|
|
/* Check whether TYPE is "Integral or Pointer". */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
m88k_integral_or_pointer_p (const struct type *type)
|
|
|
|
|
{
|
|
|
|
|
switch (TYPE_CODE (type))
|
|
|
|
|
{
|
|
|
|
|
case TYPE_CODE_INT:
|
|
|
|
|
case TYPE_CODE_BOOL:
|
|
|
|
|
case TYPE_CODE_CHAR:
|
|
|
|
|
case TYPE_CODE_ENUM:
|
|
|
|
|
case TYPE_CODE_RANGE:
|
|
|
|
|
{
|
|
|
|
|
/* We have byte, half-word, word and extended-word/doubleword
|
|
|
|
|
integral types. */
|
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
|
return (len == 1 || len == 2 || len == 4 || len == 8);
|
|
|
|
|
}
|
|
|
|
|
return 1;
|
|
|
|
|
case TYPE_CODE_PTR:
|
|
|
|
|
case TYPE_CODE_REF:
|
|
|
|
|
{
|
|
|
|
|
/* Allow only 32-bit pointers. */
|
|
|
|
|
return (TYPE_LENGTH (type) == 4);
|
|
|
|
|
}
|
|
|
|
|
return 1;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Check whether TYPE is "Floating". */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
m88k_floating_p (const struct type *type)
|
|
|
|
|
{
|
|
|
|
|
switch (TYPE_CODE (type))
|
|
|
|
|
{
|
|
|
|
|
case TYPE_CODE_FLT:
|
|
|
|
|
{
|
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
|
return (len == 4 || len == 8);
|
|
|
|
|
}
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Check whether TYPE is "Structure or Union". */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
m88k_structure_or_union_p (const struct type *type)
|
|
|
|
|
{
|
|
|
|
|
switch (TYPE_CODE (type))
|
|
|
|
|
{
|
|
|
|
|
case TYPE_CODE_STRUCT:
|
|
|
|
|
case TYPE_CODE_UNION:
|
|
|
|
|
return 1;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Check whether TYPE has 8-byte alignment. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
m88k_8_byte_align_p (struct type *type)
|
|
|
|
|
{
|
|
|
|
|
if (m88k_structure_or_union_p (type))
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < TYPE_NFIELDS (type); i++)
|
|
|
|
|
{
|
|
|
|
|
struct type *subtype = check_typedef (TYPE_FIELD_TYPE (type, i));
|
|
|
|
|
|
|
|
|
|
if (m88k_8_byte_align_p (subtype))
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (m88k_integral_or_pointer_p (type) || m88k_floating_p (type))
|
|
|
|
|
return (TYPE_LENGTH (type) == 8);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Check whether TYPE can be passed in a register. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
m88k_in_register_p (struct type *type)
|
|
|
|
|
{
|
|
|
|
|
if (m88k_integral_or_pointer_p (type) || m88k_floating_p (type))
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
|
|
if (m88k_structure_or_union_p (type) && TYPE_LENGTH (type) == 4)
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
m88k_store_arguments (struct regcache *regcache, int nargs,
|
|
|
|
|
struct value **args, CORE_ADDR sp)
|
|
|
|
|
{
|
|
|
|
|
int num_register_words = 0;
|
|
|
|
|
int num_stack_words = 0;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nargs; i++)
|
|
|
|
|
{
|
2004-11-12 Andrew Cagney <cagney@gnu.org>
* sparc-tdep.c: Replace VALUE_TYPE with value_type.
* v850-tdep.c, sparc64-tdep.c, sh-tdep.c: Ditto.
* sh64-tdep.c, s390-tdep.c, mcore-tdep.c: Ditto.
* h8300-tdep.c, arm-linux-tdep.c, amd64-tdep.c: Ditto.
* hppa-tdep.c, mips-tdep.c, m88k-tdep.c: Ditto.
* m68hc11-tdep.c, m32r-tdep.c, ia64-tdep.c: Ditto.
* frv-tdep.c, cris-tdep.c, avr-tdep.c, alpha-tdep.c: Ditto.
2004-11-13 02:15:33 +00:00
|
|
|
|
struct type *type = value_type (args[i]);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
|
|
|
|
|
|
if (m88k_integral_or_pointer_p (type) && len < 4)
|
|
|
|
|
{
|
|
|
|
|
args[i] = value_cast (builtin_type_int32, args[i]);
|
2004-11-12 Andrew Cagney <cagney@gnu.org>
* sparc-tdep.c: Replace VALUE_TYPE with value_type.
* v850-tdep.c, sparc64-tdep.c, sh-tdep.c: Ditto.
* sh64-tdep.c, s390-tdep.c, mcore-tdep.c: Ditto.
* h8300-tdep.c, arm-linux-tdep.c, amd64-tdep.c: Ditto.
* hppa-tdep.c, mips-tdep.c, m88k-tdep.c: Ditto.
* m68hc11-tdep.c, m32r-tdep.c, ia64-tdep.c: Ditto.
* frv-tdep.c, cris-tdep.c, avr-tdep.c, alpha-tdep.c: Ditto.
2004-11-13 02:15:33 +00:00
|
|
|
|
type = value_type (args[i]);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
len = TYPE_LENGTH (type);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (m88k_in_register_p (type))
|
|
|
|
|
{
|
|
|
|
|
int num_words = 0;
|
|
|
|
|
|
|
|
|
|
if (num_register_words % 2 == 1 && m88k_8_byte_align_p (type))
|
|
|
|
|
num_words++;
|
|
|
|
|
|
|
|
|
|
num_words += ((len + 3) / 4);
|
|
|
|
|
if (num_register_words + num_words <= 8)
|
|
|
|
|
{
|
|
|
|
|
num_register_words += num_words;
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* We've run out of available registers. Pass the argument
|
|
|
|
|
on the stack. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (num_stack_words % 2 == 1 && m88k_8_byte_align_p (type))
|
|
|
|
|
num_stack_words++;
|
|
|
|
|
|
|
|
|
|
num_stack_words += ((len + 3) / 4);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Allocate stack space. */
|
|
|
|
|
sp = align_down (sp - 32 - num_stack_words * 4, 16);
|
|
|
|
|
num_stack_words = num_register_words = 0;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nargs; i++)
|
|
|
|
|
{
|
2005-02-06 Andrew Cagney <cagney@gnu.org>
* value.c (value_contents, value_contents_writeable): New
functions.
* value.h (VALUE_CONTENTS): Delete macro.
(value_contents, value_contents_writeable): Declare.
* xstormy16-tdep.c, value.c, valops.c, valarith.c: Update.
* stack.c, sparc-tdep.c, sparc64-tdep.c, sh-tdep.c: Update.
* sh64-tdep.c, scm-valprint.c, scm-exp.c, s390-tdep.c: Update.
* rs6000-tdep.c, p-valprint.c, printcmd.c: Update.
* ppc-sysv-tdep.c, mips-tdep.c, mi/mi-main.c: Update.
* m88k-tdep.c, m68hc11-tdep.c, m32r-tdep.c: Update.
* jv-valprint.c, ia64-tdep.c, hppa-tdep.c: Update.
* hpacc-abi.c, f-valprint.c, frv-tdep.c, eval.c: Update.
* c-valprint.c, cris-tdep.c, cp-valprint.c: Update.
* cli/cli-dump.c, breakpoint.c, avr-tdep.c, arm-tdep.c: Update.
* arm-linux-tdep.c, amd64-tdep.c, alpha-tdep.c: Update.
* ada-valprint.c, ada-lang.c: Update.
2005-02-07 00:09:56 +00:00
|
|
|
|
const bfd_byte *valbuf = value_contents (args[i]);
|
2004-11-12 Andrew Cagney <cagney@gnu.org>
* sparc-tdep.c: Replace VALUE_TYPE with value_type.
* v850-tdep.c, sparc64-tdep.c, sh-tdep.c: Ditto.
* sh64-tdep.c, s390-tdep.c, mcore-tdep.c: Ditto.
* h8300-tdep.c, arm-linux-tdep.c, amd64-tdep.c: Ditto.
* hppa-tdep.c, mips-tdep.c, m88k-tdep.c: Ditto.
* m68hc11-tdep.c, m32r-tdep.c, ia64-tdep.c: Ditto.
* frv-tdep.c, cris-tdep.c, avr-tdep.c, alpha-tdep.c: Ditto.
2004-11-13 02:15:33 +00:00
|
|
|
|
struct type *type = value_type (args[i]);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
|
int stack_word = num_stack_words;
|
|
|
|
|
|
|
|
|
|
if (m88k_in_register_p (type))
|
|
|
|
|
{
|
|
|
|
|
int register_word = num_register_words;
|
|
|
|
|
|
|
|
|
|
if (register_word % 2 == 1 && m88k_8_byte_align_p (type))
|
|
|
|
|
register_word++;
|
|
|
|
|
|
|
|
|
|
gdb_assert (len == 4 || len == 8);
|
|
|
|
|
|
|
|
|
|
if (register_word + len / 8 < 8)
|
|
|
|
|
{
|
|
|
|
|
int regnum = M88K_R2_REGNUM + register_word;
|
|
|
|
|
|
|
|
|
|
regcache_raw_write (regcache, regnum, valbuf);
|
|
|
|
|
if (len > 4)
|
|
|
|
|
regcache_raw_write (regcache, regnum + 1, valbuf + 4);
|
|
|
|
|
|
|
|
|
|
num_register_words = (register_word + len / 4);
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (stack_word % 2 == -1 && m88k_8_byte_align_p (type))
|
|
|
|
|
stack_word++;
|
|
|
|
|
|
|
|
|
|
write_memory (sp + stack_word * 4, valbuf, len);
|
|
|
|
|
num_stack_words = (stack_word + (len + 3) / 4);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return sp;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
2004-06-07 02:02:55 +00:00
|
|
|
|
m88k_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
|
2004-05-24 21:00:09 +00:00
|
|
|
|
struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
|
|
|
|
|
struct value **args, CORE_ADDR sp, int struct_return,
|
|
|
|
|
CORE_ADDR struct_addr)
|
|
|
|
|
{
|
|
|
|
|
/* Set up the function arguments. */
|
|
|
|
|
sp = m88k_store_arguments (regcache, nargs, args, sp);
|
|
|
|
|
gdb_assert (sp % 16 == 0);
|
|
|
|
|
|
|
|
|
|
/* Store return value address. */
|
|
|
|
|
if (struct_return)
|
|
|
|
|
regcache_raw_write_unsigned (regcache, M88K_R12_REGNUM, struct_addr);
|
|
|
|
|
|
|
|
|
|
/* Store the stack pointer and return address in the appropriate
|
|
|
|
|
registers. */
|
|
|
|
|
regcache_raw_write_unsigned (regcache, M88K_R31_REGNUM, sp);
|
|
|
|
|
regcache_raw_write_unsigned (regcache, M88K_R1_REGNUM, bp_addr);
|
|
|
|
|
|
|
|
|
|
/* Return the stack pointer. */
|
|
|
|
|
return sp;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static struct frame_id
|
|
|
|
|
m88k_unwind_dummy_id (struct gdbarch *arch, struct frame_info *next_frame)
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR sp;
|
|
|
|
|
|
|
|
|
|
sp = frame_unwind_register_unsigned (next_frame, M88K_R31_REGNUM);
|
|
|
|
|
return frame_id_build (sp, frame_pc_unwind (next_frame));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Determine, for architecture GDBARCH, how a return value of TYPE
|
|
|
|
|
should be returned. If it is supposed to be returned in registers,
|
|
|
|
|
and READBUF is non-zero, read the appropriate value from REGCACHE,
|
|
|
|
|
and copy it into READBUF. If WRITEBUF is non-zero, write the value
|
|
|
|
|
from WRITEBUF into REGCACHE. */
|
|
|
|
|
|
|
|
|
|
static enum return_value_convention
|
|
|
|
|
m88k_return_value (struct gdbarch *gdbarch, struct type *type,
|
2005-05-14 11:50:36 +00:00
|
|
|
|
struct regcache *regcache, gdb_byte *readbuf,
|
|
|
|
|
const gdb_byte *writebuf)
|
2004-05-24 21:00:09 +00:00
|
|
|
|
{
|
|
|
|
|
int len = TYPE_LENGTH (type);
|
2005-05-14 11:50:36 +00:00
|
|
|
|
gdb_byte buf[8];
|
2004-05-24 21:00:09 +00:00
|
|
|
|
|
|
|
|
|
if (!m88k_integral_or_pointer_p (type) && !m88k_floating_p (type))
|
|
|
|
|
return RETURN_VALUE_STRUCT_CONVENTION;
|
|
|
|
|
|
|
|
|
|
if (readbuf)
|
|
|
|
|
{
|
|
|
|
|
/* Read the contents of R2 and (if necessary) R3. */
|
|
|
|
|
regcache_cooked_read (regcache, M88K_R2_REGNUM, buf);
|
|
|
|
|
if (len > 4)
|
|
|
|
|
{
|
|
|
|
|
regcache_cooked_read (regcache, M88K_R3_REGNUM, buf + 4);
|
|
|
|
|
gdb_assert (len == 8);
|
|
|
|
|
memcpy (readbuf, buf, len);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* Just stripping off any unused bytes should preserve the
|
|
|
|
|
signed-ness just fine. */
|
|
|
|
|
memcpy (readbuf, buf + 4 - len, len);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (writebuf)
|
|
|
|
|
{
|
|
|
|
|
/* Read the contents to R2 and (if necessary) R3. */
|
|
|
|
|
if (len > 4)
|
|
|
|
|
{
|
|
|
|
|
gdb_assert (len == 8);
|
|
|
|
|
memcpy (buf, writebuf, 8);
|
|
|
|
|
regcache_cooked_write (regcache, M88K_R3_REGNUM, buf + 4);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* ??? Do we need to do any sign-extension here? */
|
|
|
|
|
memcpy (buf + 4 - len, writebuf, len);
|
|
|
|
|
}
|
|
|
|
|
regcache_cooked_write (regcache, M88K_R2_REGNUM, buf);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return RETURN_VALUE_REGISTER_CONVENTION;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Default frame unwinder. */
|
|
|
|
|
|
|
|
|
|
struct m88k_frame_cache
|
|
|
|
|
{
|
|
|
|
|
/* Base address. */
|
|
|
|
|
CORE_ADDR base;
|
|
|
|
|
CORE_ADDR pc;
|
|
|
|
|
|
|
|
|
|
int sp_offset;
|
|
|
|
|
int fp_offset;
|
|
|
|
|
|
|
|
|
|
/* Table of saved registers. */
|
|
|
|
|
struct trad_frame_saved_reg *saved_regs;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Prologue analysis. */
|
|
|
|
|
|
|
|
|
|
/* Macros for extracting fields from instructions. */
|
|
|
|
|
|
|
|
|
|
#define BITMASK(pos, width) (((0x1 << (width)) - 1) << (pos))
|
|
|
|
|
#define EXTRACT_FIELD(val, pos, width) ((val) >> (pos) & BITMASK (0, width))
|
|
|
|
|
#define SUBU_OFFSET(x) ((unsigned)(x & 0xFFFF))
|
|
|
|
|
#define ST_OFFSET(x) ((unsigned)((x) & 0xFFFF))
|
|
|
|
|
#define ST_SRC(x) EXTRACT_FIELD ((x), 21, 5)
|
|
|
|
|
#define ADDU_OFFSET(x) ((unsigned)(x & 0xFFFF))
|
|
|
|
|
|
|
|
|
|
/* Possible actions to be taken by the prologue analyzer for the
|
|
|
|
|
instructions it encounters. */
|
|
|
|
|
|
|
|
|
|
enum m88k_prologue_insn_action
|
|
|
|
|
{
|
|
|
|
|
M88K_PIA_SKIP, /* Ignore. */
|
|
|
|
|
M88K_PIA_NOTE_ST, /* Note register store. */
|
|
|
|
|
M88K_PIA_NOTE_STD, /* Note register pair store. */
|
|
|
|
|
M88K_PIA_NOTE_SP_ADJUSTMENT, /* Note stack pointer adjustment. */
|
|
|
|
|
M88K_PIA_NOTE_FP_ASSIGNMENT, /* Note frame pointer assignment. */
|
|
|
|
|
M88K_PIA_NOTE_BRANCH, /* Note branch. */
|
|
|
|
|
M88K_PIA_NOTE_PROLOGUE_END /* Note end of prologue. */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Table of instructions that may comprise a function prologue. */
|
|
|
|
|
|
|
|
|
|
struct m88k_prologue_insn
|
|
|
|
|
{
|
|
|
|
|
unsigned long insn;
|
|
|
|
|
unsigned long mask;
|
|
|
|
|
enum m88k_prologue_insn_action action;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct m88k_prologue_insn m88k_prologue_insn_table[] =
|
|
|
|
|
{
|
|
|
|
|
/* Various register move instructions. */
|
|
|
|
|
{ 0x58000000, 0xf800ffff, M88K_PIA_SKIP }, /* or/or.u with immed of 0 */
|
|
|
|
|
{ 0xf4005800, 0xfc1fffe0, M88K_PIA_SKIP }, /* or rd,r0,rs */
|
|
|
|
|
{ 0xf4005800, 0xfc00ffff, M88K_PIA_SKIP }, /* or rd,rs,r0 */
|
|
|
|
|
|
|
|
|
|
/* Various other instructions. */
|
|
|
|
|
{ 0x58000000, 0xf8000000, M88K_PIA_SKIP }, /* or/or.u */
|
|
|
|
|
|
|
|
|
|
/* Stack pointer setup: "subu sp,sp,n" where n is a multiple of 8. */
|
|
|
|
|
{ 0x67ff0000, 0xffff0007, M88K_PIA_NOTE_SP_ADJUSTMENT },
|
|
|
|
|
|
|
|
|
|
/* Frame pointer assignment: "addu r30,r31,n". */
|
|
|
|
|
{ 0x63df0000, 0xffff0000, M88K_PIA_NOTE_FP_ASSIGNMENT },
|
|
|
|
|
|
|
|
|
|
/* Store to stack instructions; either "st rx,sp,n" or "st.d rx,sp,n". */
|
|
|
|
|
{ 0x241f0000, 0xfc1f0000, M88K_PIA_NOTE_ST }, /* st rx,sp,n */
|
|
|
|
|
{ 0x201f0000, 0xfc1f0000, M88K_PIA_NOTE_STD }, /* st.d rs,sp,n */
|
|
|
|
|
|
|
|
|
|
/* Instructions needed for setting up r25 for pic code. */
|
|
|
|
|
{ 0x5f200000, 0xffff0000, M88K_PIA_SKIP }, /* or.u r25,r0,offset_high */
|
|
|
|
|
{ 0xcc000002, 0xffffffff, M88K_PIA_SKIP }, /* bsr.n Lab */
|
|
|
|
|
{ 0x5b390000, 0xffff0000, M88K_PIA_SKIP }, /* or r25,r25,offset_low */
|
|
|
|
|
{ 0xf7396001, 0xffffffff, M88K_PIA_SKIP }, /* Lab: addu r25,r25,r1 */
|
|
|
|
|
|
|
|
|
|
/* Various branch or jump instructions which have a delay slot --
|
|
|
|
|
these do not form part of the prologue, but the instruction in
|
|
|
|
|
the delay slot might be a store instruction which should be
|
|
|
|
|
noted. */
|
|
|
|
|
{ 0xc4000000, 0xe4000000, M88K_PIA_NOTE_BRANCH },
|
|
|
|
|
/* br.n, bsr.n, bb0.n, or bb1.n */
|
|
|
|
|
{ 0xec000000, 0xfc000000, M88K_PIA_NOTE_BRANCH }, /* bcnd.n */
|
|
|
|
|
{ 0xf400c400, 0xfffff7e0, M88K_PIA_NOTE_BRANCH }, /* jmp.n or jsr.n */
|
|
|
|
|
|
|
|
|
|
/* Catch all. Ends prologue analysis. */
|
|
|
|
|
{ 0x00000000, 0x00000000, M88K_PIA_NOTE_PROLOGUE_END }
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Do a full analysis of the function prologue at PC and update CACHE
|
|
|
|
|
accordingly. Bail out early if LIMIT is reached. Return the
|
|
|
|
|
address where the analysis stopped. If LIMIT points beyond the
|
|
|
|
|
function prologue, the return address should be the end of the
|
|
|
|
|
prologue. */
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
m88k_analyze_prologue (CORE_ADDR pc, CORE_ADDR limit,
|
|
|
|
|
struct m88k_frame_cache *cache)
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR end = limit;
|
|
|
|
|
|
|
|
|
|
/* Provide a dummy cache if necessary. */
|
|
|
|
|
if (cache == NULL)
|
|
|
|
|
{
|
|
|
|
|
size_t sizeof_saved_regs =
|
|
|
|
|
(M88K_R31_REGNUM + 1) * sizeof (struct trad_frame_saved_reg);
|
|
|
|
|
|
|
|
|
|
cache = alloca (sizeof (struct m88k_frame_cache));
|
|
|
|
|
cache->saved_regs = alloca (sizeof_saved_regs);
|
|
|
|
|
|
|
|
|
|
/* We only initialize the members we care about. */
|
|
|
|
|
cache->saved_regs[M88K_R1_REGNUM].addr = -1;
|
|
|
|
|
cache->fp_offset = -1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
while (pc < limit)
|
|
|
|
|
{
|
|
|
|
|
struct m88k_prologue_insn *pi = m88k_prologue_insn_table;
|
|
|
|
|
unsigned long insn = m88k_fetch_instruction (pc);
|
|
|
|
|
|
|
|
|
|
while ((insn & pi->mask) != pi->insn)
|
|
|
|
|
pi++;
|
|
|
|
|
|
|
|
|
|
switch (pi->action)
|
|
|
|
|
{
|
|
|
|
|
case M88K_PIA_SKIP:
|
|
|
|
|
/* If we have a frame pointer, and R1 has been saved,
|
|
|
|
|
consider this instruction as not being part of the
|
|
|
|
|
prologue. */
|
|
|
|
|
if (cache->fp_offset != -1
|
|
|
|
|
&& cache->saved_regs[M88K_R1_REGNUM].addr != -1)
|
|
|
|
|
return min (pc, end);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case M88K_PIA_NOTE_ST:
|
|
|
|
|
case M88K_PIA_NOTE_STD:
|
|
|
|
|
/* If no frame has been allocated, the stores aren't part of
|
|
|
|
|
the prologue. */
|
|
|
|
|
if (cache->sp_offset == 0)
|
|
|
|
|
return min (pc, end);
|
|
|
|
|
|
|
|
|
|
/* Record location of saved registers. */
|
|
|
|
|
{
|
|
|
|
|
int regnum = ST_SRC (insn) + M88K_R0_REGNUM;
|
|
|
|
|
ULONGEST offset = ST_OFFSET (insn);
|
|
|
|
|
|
|
|
|
|
cache->saved_regs[regnum].addr = offset;
|
|
|
|
|
if (pi->action == M88K_PIA_NOTE_STD && regnum < M88K_R31_REGNUM)
|
|
|
|
|
cache->saved_regs[regnum + 1].addr = offset + 4;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case M88K_PIA_NOTE_SP_ADJUSTMENT:
|
|
|
|
|
/* A second stack pointer adjustment isn't part of the
|
|
|
|
|
prologue. */
|
|
|
|
|
if (cache->sp_offset != 0)
|
|
|
|
|
return min (pc, end);
|
|
|
|
|
|
|
|
|
|
/* Store stack pointer adjustment. */
|
|
|
|
|
cache->sp_offset = -SUBU_OFFSET (insn);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case M88K_PIA_NOTE_FP_ASSIGNMENT:
|
|
|
|
|
/* A second frame pointer assignment isn't part of the
|
|
|
|
|
prologue. */
|
|
|
|
|
if (cache->fp_offset != -1)
|
|
|
|
|
return min (pc, end);
|
|
|
|
|
|
|
|
|
|
/* Record frame pointer assignment. */
|
|
|
|
|
cache->fp_offset = ADDU_OFFSET (insn);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case M88K_PIA_NOTE_BRANCH:
|
|
|
|
|
/* The branch instruction isn't part of the prologue, but
|
|
|
|
|
the instruction in the delay slot might be. Limit the
|
|
|
|
|
prologue analysis to the delay slot and record the branch
|
|
|
|
|
instruction as the end of the prologue. */
|
2004-05-30 18:16:31 +00:00
|
|
|
|
limit = min (limit, pc + 2 * M88K_INSN_SIZE);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
end = pc;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case M88K_PIA_NOTE_PROLOGUE_END:
|
|
|
|
|
return min (pc, end);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pc += M88K_INSN_SIZE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return end;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* An upper limit to the size of the prologue. */
|
|
|
|
|
const int m88k_max_prologue_size = 128 * M88K_INSN_SIZE;
|
|
|
|
|
|
|
|
|
|
/* Return the address of first real instruction of the function
|
|
|
|
|
starting at PC. */
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
m88k_skip_prologue (CORE_ADDR pc)
|
|
|
|
|
{
|
|
|
|
|
struct symtab_and_line sal;
|
|
|
|
|
CORE_ADDR func_start, func_end;
|
|
|
|
|
|
|
|
|
|
/* This is the preferred method, find the end of the prologue by
|
|
|
|
|
using the debugging information. */
|
|
|
|
|
if (find_pc_partial_function (pc, NULL, &func_start, &func_end))
|
|
|
|
|
{
|
|
|
|
|
sal = find_pc_line (func_start, 0);
|
|
|
|
|
|
|
|
|
|
if (sal.end < func_end && pc <= sal.end)
|
|
|
|
|
return sal.end;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return m88k_analyze_prologue (pc, pc + m88k_max_prologue_size, NULL);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
struct m88k_frame_cache *
|
|
|
|
|
m88k_frame_cache (struct frame_info *next_frame, void **this_cache)
|
|
|
|
|
{
|
|
|
|
|
struct m88k_frame_cache *cache;
|
|
|
|
|
CORE_ADDR frame_sp;
|
|
|
|
|
|
|
|
|
|
if (*this_cache)
|
|
|
|
|
return *this_cache;
|
|
|
|
|
|
|
|
|
|
cache = FRAME_OBSTACK_ZALLOC (struct m88k_frame_cache);
|
|
|
|
|
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
|
|
|
|
|
cache->fp_offset = -1;
|
|
|
|
|
|
|
|
|
|
cache->pc = frame_func_unwind (next_frame);
|
|
|
|
|
if (cache->pc != 0)
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR addr_in_block = frame_unwind_address_in_block (next_frame);
|
|
|
|
|
m88k_analyze_prologue (cache->pc, addr_in_block, cache);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Calculate the stack pointer used in the prologue. */
|
|
|
|
|
if (cache->fp_offset != -1)
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR fp;
|
|
|
|
|
|
|
|
|
|
fp = frame_unwind_register_unsigned (next_frame, M88K_R30_REGNUM);
|
|
|
|
|
frame_sp = fp - cache->fp_offset;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* If we know where the return address is saved, we can take a
|
|
|
|
|
solid guess at what the frame pointer should be. */
|
|
|
|
|
if (cache->saved_regs[M88K_R1_REGNUM].addr != -1)
|
|
|
|
|
cache->fp_offset = cache->saved_regs[M88K_R1_REGNUM].addr - 4;
|
|
|
|
|
frame_sp = frame_unwind_register_unsigned (next_frame, M88K_R31_REGNUM);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Now that we know the stack pointer, adjust the location of the
|
|
|
|
|
saved registers. */
|
|
|
|
|
{
|
|
|
|
|
int regnum;
|
|
|
|
|
|
|
|
|
|
for (regnum = M88K_R0_REGNUM; regnum < M88K_R31_REGNUM; regnum ++)
|
|
|
|
|
if (cache->saved_regs[regnum].addr != -1)
|
|
|
|
|
cache->saved_regs[regnum].addr += frame_sp;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Calculate the frame's base. */
|
|
|
|
|
cache->base = frame_sp - cache->sp_offset;
|
|
|
|
|
trad_frame_set_value (cache->saved_regs, M88K_R31_REGNUM, cache->base);
|
|
|
|
|
|
|
|
|
|
/* Identify SXIP with the return address in R1. */
|
|
|
|
|
cache->saved_regs[M88K_SXIP_REGNUM] = cache->saved_regs[M88K_R1_REGNUM];
|
|
|
|
|
|
|
|
|
|
*this_cache = cache;
|
|
|
|
|
return cache;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
m88k_frame_this_id (struct frame_info *next_frame, void **this_cache,
|
|
|
|
|
struct frame_id *this_id)
|
|
|
|
|
{
|
|
|
|
|
struct m88k_frame_cache *cache = m88k_frame_cache (next_frame, this_cache);
|
|
|
|
|
|
|
|
|
|
/* This marks the outermost frame. */
|
|
|
|
|
if (cache->base == 0)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
(*this_id) = frame_id_build (cache->base, cache->pc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
m88k_frame_prev_register (struct frame_info *next_frame, void **this_cache,
|
|
|
|
|
int regnum, int *optimizedp,
|
|
|
|
|
enum lval_type *lvalp, CORE_ADDR *addrp,
|
2005-06-12 11:53:00 +00:00
|
|
|
|
int *realnump, gdb_byte *valuep)
|
2004-05-24 21:00:09 +00:00
|
|
|
|
{
|
|
|
|
|
struct m88k_frame_cache *cache = m88k_frame_cache (next_frame, this_cache);
|
|
|
|
|
|
|
|
|
|
if (regnum == M88K_SNIP_REGNUM || regnum == M88K_SFIP_REGNUM)
|
|
|
|
|
{
|
|
|
|
|
if (valuep)
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR pc;
|
|
|
|
|
|
2004-07-31 21:53:17 +00:00
|
|
|
|
trad_frame_get_prev_register (next_frame, cache->saved_regs,
|
|
|
|
|
M88K_SXIP_REGNUM, optimizedp,
|
|
|
|
|
lvalp, addrp, realnump, valuep);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
|
|
|
|
|
pc = extract_unsigned_integer (valuep, 4);
|
2004-05-30 18:16:31 +00:00
|
|
|
|
if (regnum == M88K_SFIP_REGNUM)
|
2004-05-24 21:00:09 +00:00
|
|
|
|
pc += 4;
|
2004-05-30 18:16:31 +00:00
|
|
|
|
store_unsigned_integer (valuep, 4, pc + 4);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* It's a computed value. */
|
|
|
|
|
*optimizedp = 0;
|
|
|
|
|
*lvalp = not_lval;
|
|
|
|
|
*addrp = 0;
|
|
|
|
|
*realnump = -1;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2004-07-31 21:53:17 +00:00
|
|
|
|
trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
|
|
|
|
|
optimizedp, lvalp, addrp, realnump, valuep);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const struct frame_unwind m88k_frame_unwind =
|
|
|
|
|
{
|
|
|
|
|
NORMAL_FRAME,
|
|
|
|
|
m88k_frame_this_id,
|
|
|
|
|
m88k_frame_prev_register
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const struct frame_unwind *
|
|
|
|
|
m88k_frame_sniffer (struct frame_info *next_frame)
|
|
|
|
|
{
|
|
|
|
|
return &m88k_frame_unwind;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
|
m88k_frame_base_address (struct frame_info *next_frame, void **this_cache)
|
|
|
|
|
{
|
|
|
|
|
struct m88k_frame_cache *cache = m88k_frame_cache (next_frame, this_cache);
|
|
|
|
|
|
|
|
|
|
if (cache->fp_offset != -1)
|
|
|
|
|
return cache->base + cache->sp_offset + cache->fp_offset;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const struct frame_base m88k_frame_base =
|
|
|
|
|
{
|
|
|
|
|
&m88k_frame_unwind,
|
|
|
|
|
m88k_frame_base_address,
|
|
|
|
|
m88k_frame_base_address,
|
|
|
|
|
m88k_frame_base_address
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Core file support. */
|
|
|
|
|
|
|
|
|
|
/* Supply register REGNUM from the buffer specified by GREGS and LEN
|
|
|
|
|
in the general-purpose register set REGSET to register cache
|
|
|
|
|
REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
m88k_supply_gregset (const struct regset *regset,
|
|
|
|
|
struct regcache *regcache,
|
|
|
|
|
int regnum, const void *gregs, size_t len)
|
|
|
|
|
{
|
2005-05-14 11:50:36 +00:00
|
|
|
|
const gdb_byte *regs = gregs;
|
2004-05-24 21:00:09 +00:00
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < M88K_NUM_REGS; i++)
|
|
|
|
|
{
|
|
|
|
|
if (regnum == i || regnum == -1)
|
|
|
|
|
regcache_raw_supply (regcache, i, regs + i * 4);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Motorola 88000 register set. */
|
|
|
|
|
|
|
|
|
|
static struct regset m88k_gregset =
|
|
|
|
|
{
|
|
|
|
|
NULL,
|
|
|
|
|
m88k_supply_gregset
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Return the appropriate register set for the core section identified
|
|
|
|
|
by SECT_NAME and SECT_SIZE. */
|
|
|
|
|
|
|
|
|
|
static const struct regset *
|
|
|
|
|
m88k_regset_from_core_section (struct gdbarch *gdbarch,
|
|
|
|
|
const char *sect_name, size_t sect_size)
|
|
|
|
|
{
|
|
|
|
|
if (strcmp (sect_name, ".reg") == 0 && sect_size >= M88K_NUM_REGS * 4)
|
|
|
|
|
return &m88k_gregset;
|
|
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static struct gdbarch *
|
|
|
|
|
m88k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|
|
|
|
{
|
|
|
|
|
struct gdbarch *gdbarch;
|
|
|
|
|
|
|
|
|
|
/* If there is already a candidate, use it. */
|
|
|
|
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
|
|
|
|
if (arches != NULL)
|
|
|
|
|
return arches->gdbarch;
|
|
|
|
|
|
|
|
|
|
/* Allocate space for the new architecture. */
|
|
|
|
|
gdbarch = gdbarch_alloc (&info, NULL);
|
|
|
|
|
|
|
|
|
|
/* There is no real `long double'. */
|
|
|
|
|
set_gdbarch_long_double_bit (gdbarch, 64);
|
* doublest.c (floatformat_from_length): Use the right element from
gdbarch floatformats.
(floatformat_from_type, extract_typed_floating)
(store_typed_floating): Likewise.
* doublest.h: Remove declarations for undefined floatformat arrays.
* gdbarch.sh (float_format, double_format, long_double_format): Change
to pairs.
(pformat): Update for pairs.
* gdbarch.c, gdbarch.h: Regenerated.
* gdbtypes.c (floatformats_ieee_single, floatformats_ieee_double)
(floatformats_ieee_double_littlebyte_bigword)
(floatformats_i387_ext, floatformats_m68881_ext, floatformats_arm_ext)
(floatformats_ia64_spill, floatformats_ia64_quad, floatformats_vax_f)
(floatformats_vax_d): New variables.
(builtin_type_ieee_single, builtin_type_ieee_double)
(builtin_type_arm_ext, builtin_type_ia64_spill)
(builtin_type_ia64_quad): Replace arrays with individual types.
(builtin_type_ieee_single_big, builtin_type_ieee_single_little)
(builtin_type_ieee_double_big, builtin_type_ieee_double_little)
(builtin_type_ieee_double_littlebyte_bigword, builtin_type_i960_ext)
(builtin_type_m88110_ext, builtin_type_m88110_harris_ext)
(builtin_type_arm_ext_big, builtin_type_arm_ext_littlebyte_bigword)
(builtin_type_ia64_spill_big, builtin_type_ia64_spill_little)
(builtin_type_ia64_quad_big, builtin_type_ia64_quad_little): Delete
unused and endian-specific types.
(recursive_dump_type): Update for floatformat pairs.
(build_flt): Move higher. Handle bit == -1. Take a floatformat pair.
(build_gdbtypes): Use build_flt.
(_initialize_gdbtypes): Update set of initialized types.
* gdbtypes.h: Update declarations to match gdbtypes.c.
(struct main_type): Store a pointer to two floatformats.
* arch-utils.c (default_float_format, default_double_format): Delete.
* arch-utils.h (default_float_format, default_double_format): Delete.
* arm-tdep.c, avr-tdep.c, hppa-tdep.c, hppabsd-tdep.c, i386-tdep.c,
ia64-tdep.c, iq2000-tdep.c, m68k-tdep.c, m88k-tdep.c,
mips-linux-tdep.c, mips-tdep.c, mt-tdep.c, ppcobsd-tdep.c,
sparc-linux-tdep.c, sparc-tdep.c, sparcnbsd-tdep.c, spu-tdep.c,
vax-tdep.c, alpha-tdep.c, ppc-sysv-tdep.c: Update.
2007-01-29 17:31:06 +00:00
|
|
|
|
set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
|
2004-05-24 21:00:09 +00:00
|
|
|
|
|
|
|
|
|
set_gdbarch_num_regs (gdbarch, M88K_NUM_REGS);
|
|
|
|
|
set_gdbarch_register_name (gdbarch, m88k_register_name);
|
|
|
|
|
set_gdbarch_register_type (gdbarch, m88k_register_type);
|
|
|
|
|
|
|
|
|
|
/* Register numbers of various important registers. */
|
|
|
|
|
set_gdbarch_sp_regnum (gdbarch, M88K_R31_REGNUM);
|
|
|
|
|
set_gdbarch_pc_regnum (gdbarch, M88K_SXIP_REGNUM);
|
|
|
|
|
|
|
|
|
|
/* Core file support. */
|
|
|
|
|
set_gdbarch_regset_from_core_section
|
|
|
|
|
(gdbarch, m88k_regset_from_core_section);
|
|
|
|
|
|
|
|
|
|
set_gdbarch_print_insn (gdbarch, print_insn_m88k);
|
|
|
|
|
|
|
|
|
|
set_gdbarch_skip_prologue (gdbarch, m88k_skip_prologue);
|
|
|
|
|
|
|
|
|
|
/* Stack grows downward. */
|
|
|
|
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
|
|
|
|
|
|
|
|
|
/* Call dummy code. */
|
|
|
|
|
set_gdbarch_push_dummy_call (gdbarch, m88k_push_dummy_call);
|
|
|
|
|
set_gdbarch_unwind_dummy_id (gdbarch, m88k_unwind_dummy_id);
|
|
|
|
|
|
|
|
|
|
/* Return value info */
|
|
|
|
|
set_gdbarch_return_value (gdbarch, m88k_return_value);
|
|
|
|
|
|
|
|
|
|
set_gdbarch_addr_bits_remove (gdbarch, m88k_addr_bits_remove);
|
|
|
|
|
set_gdbarch_breakpoint_from_pc (gdbarch, m88k_breakpoint_from_pc);
|
|
|
|
|
set_gdbarch_unwind_pc (gdbarch, m88k_unwind_pc);
|
|
|
|
|
set_gdbarch_write_pc (gdbarch, m88k_write_pc);
|
|
|
|
|
|
|
|
|
|
frame_base_set_default (gdbarch, &m88k_frame_base);
|
|
|
|
|
frame_unwind_append_sniffer (gdbarch, m88k_frame_sniffer);
|
|
|
|
|
|
|
|
|
|
return gdbarch;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
|
|
|
void _initialize_m88k_tdep (void);
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
_initialize_m88k_tdep (void)
|
|
|
|
|
{
|
|
|
|
|
gdbarch_register (bfd_arch_m88k, m88k_gdbarch_init, NULL);
|
|
|
|
|
}
|