/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
- Copyright 1996, 1997, 1998, 1999, 2000, 2001
- Free Software Foundation, Inc.
+
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
+ Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "frame.h"
#include "inferior.h"
-#include "obstack.h"
#include "target.h"
#include "value.h"
#include "bfd.h"
#include "regcache.h"
#include "arch-utils.h"
+#define D0_REGNUM 0
+#define D2_REGNUM 2
+#define D3_REGNUM 3
+#define A0_REGNUM 4
+#define A2_REGNUM 6
+#define A3_REGNUM 7
+#define MDR_REGNUM 10
+#define PSW_REGNUM 11
+#define LIR_REGNUM 12
+#define LAR_REGNUM 13
+#define MDRQ_REGNUM 14
+#define E0_REGNUM 15
+#define MCRH_REGNUM 26
+#define MCRL_REGNUM 27
+#define MCVF_REGNUM 28
+
+enum movm_register_bits {
+ movm_exother_bit = 0x01,
+ movm_exreg1_bit = 0x02,
+ movm_exreg0_bit = 0x04,
+ movm_other_bit = 0x08,
+ movm_a3_bit = 0x10,
+ movm_a2_bit = 0x20,
+ movm_d3_bit = 0x40,
+ movm_d2_bit = 0x80
+};
+
extern void _initialize_mn10300_tdep (void);
static CORE_ADDR mn10300_analyze_prologue (struct frame_info *fi,
CORE_ADDR pc);
return regs[reg];
}
-static char *
+static const char *
mn10300_generic_register_name (int reg)
{
static char *regs[] =
}
-static char *
+static const char *
am33_register_name (int reg)
{
static char *regs[] =
mn10300_store_return_value (struct type *type, char *valbuf)
{
if (TYPE_CODE (type) == TYPE_CODE_PTR)
- write_register_bytes (REGISTER_BYTE (4), valbuf, TYPE_LENGTH (type));
+ deprecated_write_register_bytes (REGISTER_BYTE (4), valbuf,
+ TYPE_LENGTH (type));
else
- write_register_bytes (REGISTER_BYTE (0), valbuf, TYPE_LENGTH (type));
+ deprecated_write_register_bytes (REGISTER_BYTE (0), valbuf,
+ TYPE_LENGTH (type));
}
static struct frame_info *analyze_dummy_frame (CORE_ADDR, CORE_ADDR);
}
dummy->next = NULL;
dummy->prev = NULL;
- dummy->pc = pc;
+ deprecated_update_frame_pc_hack (dummy, pc);
dummy->frame = frame;
dummy->extra_info->status = 0;
dummy->extra_info->stack_size = 0;
- memset (dummy->saved_regs, '\000', SIZEOF_FRAME_SAVED_REGS);
+ memset (get_frame_saved_regs (dummy), '\000', SIZEOF_FRAME_SAVED_REGS);
mn10300_analyze_prologue (dummy, 0);
return dummy;
}
so we need a single byte breakpoint. Matsushita hasn't defined
one, so we defined it ourselves. */
-static unsigned char *
+const static unsigned char *
mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)
{
static char breakpoint[] =
/* The `other' bit leaves a blank area of four bytes at the
beginning of its block of saved registers, making it 32 bytes
long in total. */
- fi->saved_regs[LAR_REGNUM] = fi->frame + offset + 4;
- fi->saved_regs[LIR_REGNUM] = fi->frame + offset + 8;
- fi->saved_regs[MDR_REGNUM] = fi->frame + offset + 12;
- fi->saved_regs[A0_REGNUM + 1] = fi->frame + offset + 16;
- fi->saved_regs[A0_REGNUM] = fi->frame + offset + 20;
- fi->saved_regs[D0_REGNUM + 1] = fi->frame + offset + 24;
- fi->saved_regs[D0_REGNUM] = fi->frame + offset + 28;
+ get_frame_saved_regs (fi)[LAR_REGNUM] = fi->frame + offset + 4;
+ get_frame_saved_regs (fi)[LIR_REGNUM] = fi->frame + offset + 8;
+ get_frame_saved_regs (fi)[MDR_REGNUM] = fi->frame + offset + 12;
+ get_frame_saved_regs (fi)[A0_REGNUM + 1] = fi->frame + offset + 16;
+ get_frame_saved_regs (fi)[A0_REGNUM] = fi->frame + offset + 20;
+ get_frame_saved_regs (fi)[D0_REGNUM + 1] = fi->frame + offset + 24;
+ get_frame_saved_regs (fi)[D0_REGNUM] = fi->frame + offset + 28;
offset += 32;
}
if (movm_args & movm_a3_bit)
{
- fi->saved_regs[A3_REGNUM] = fi->frame + offset;
+ get_frame_saved_regs (fi)[A3_REGNUM] = fi->frame + offset;
offset += 4;
}
if (movm_args & movm_a2_bit)
{
- fi->saved_regs[A2_REGNUM] = fi->frame + offset;
+ get_frame_saved_regs (fi)[A2_REGNUM] = fi->frame + offset;
offset += 4;
}
if (movm_args & movm_d3_bit)
{
- fi->saved_regs[D3_REGNUM] = fi->frame + offset;
+ get_frame_saved_regs (fi)[D3_REGNUM] = fi->frame + offset;
offset += 4;
}
if (movm_args & movm_d2_bit)
{
- fi->saved_regs[D2_REGNUM] = fi->frame + offset;
+ get_frame_saved_regs (fi)[D2_REGNUM] = fi->frame + offset;
offset += 4;
}
if (AM33_MODE)
{
if (movm_args & movm_exother_bit)
{
- fi->saved_regs[MCVF_REGNUM] = fi->frame + offset;
- fi->saved_regs[MCRL_REGNUM] = fi->frame + offset + 4;
- fi->saved_regs[MCRH_REGNUM] = fi->frame + offset + 8;
- fi->saved_regs[MDRQ_REGNUM] = fi->frame + offset + 12;
- fi->saved_regs[E0_REGNUM + 1] = fi->frame + offset + 16;
- fi->saved_regs[E0_REGNUM + 0] = fi->frame + offset + 20;
+ get_frame_saved_regs (fi)[MCVF_REGNUM] = fi->frame + offset;
+ get_frame_saved_regs (fi)[MCRL_REGNUM] = fi->frame + offset + 4;
+ get_frame_saved_regs (fi)[MCRH_REGNUM] = fi->frame + offset + 8;
+ get_frame_saved_regs (fi)[MDRQ_REGNUM] = fi->frame + offset + 12;
+ get_frame_saved_regs (fi)[E0_REGNUM + 1] = fi->frame + offset + 16;
+ get_frame_saved_regs (fi)[E0_REGNUM + 0] = fi->frame + offset + 20;
offset += 24;
}
if (movm_args & movm_exreg1_bit)
{
- fi->saved_regs[E0_REGNUM + 7] = fi->frame + offset;
- fi->saved_regs[E0_REGNUM + 6] = fi->frame + offset + 4;
- fi->saved_regs[E0_REGNUM + 5] = fi->frame + offset + 8;
- fi->saved_regs[E0_REGNUM + 4] = fi->frame + offset + 12;
+ get_frame_saved_regs (fi)[E0_REGNUM + 7] = fi->frame + offset;
+ get_frame_saved_regs (fi)[E0_REGNUM + 6] = fi->frame + offset + 4;
+ get_frame_saved_regs (fi)[E0_REGNUM + 5] = fi->frame + offset + 8;
+ get_frame_saved_regs (fi)[E0_REGNUM + 4] = fi->frame + offset + 12;
offset += 16;
}
if (movm_args & movm_exreg0_bit)
{
- fi->saved_regs[E0_REGNUM + 3] = fi->frame + offset;
- fi->saved_regs[E0_REGNUM + 2] = fi->frame + offset + 4;
+ get_frame_saved_regs (fi)[E0_REGNUM + 3] = fi->frame + offset;
+ get_frame_saved_regs (fi)[E0_REGNUM + 2] = fi->frame + offset + 4;
offset += 8;
}
}
/* The main purpose of this file is dealing with prologues to extract
information about stack frames and saved registers.
- For reference here's how prologues look on the mn10300:
+ In gcc/config/mn13000/mn10300.c, the expand_prologue prologue
+ function is pretty readable, and has a nice explanation of how the
+ prologue is generated. The prologues generated by that code will
+ have the following form (NOTE: the current code doesn't handle all
+ this!):
+
+ + If this is an old-style varargs function, then its arguments
+ need to be flushed back to the stack:
+
+ mov d0,(4,sp)
+ mov d1,(4,sp)
+
+ + If we use any of the callee-saved registers, save them now.
+
+ movm [some callee-saved registers],(sp)
+
+ + If we have any floating-point registers to save:
+
+ - Decrement the stack pointer to reserve space for the registers.
+ If the function doesn't need a frame pointer, we may combine
+ this with the adjustment that reserves space for the frame.
+
+ add -SIZE, sp
+
+ - Save the floating-point registers. We have two possible
+ strategies:
+
+ . Save them at fixed offset from the SP:
+
+ fmov fsN,(OFFSETN,sp)
+ fmov fsM,(OFFSETM,sp)
+ ...
+
+ Note that, if OFFSETN happens to be zero, you'll get the
+ different opcode: fmov fsN,(sp)
+
+ . Or, set a0 to the start of the save area, and then use
+ post-increment addressing to save the FP registers.
+
+ mov sp, a0
+ add SIZE, a0
+ fmov fsN,(a0+)
+ fmov fsM,(a0+)
+ ...
+
+ + If the function needs a frame pointer, we set it here.
- With frame pointer:
- movm [d2,d3,a2,a3],sp
- mov sp,a3
- add <size>,sp
+ mov sp, a3
- Without frame pointer:
- movm [d2,d3,a2,a3],sp (if needed)
- add <size>,sp
+ + Now we reserve space for the stack frame proper. This could be
+ merged into the `add -SIZE, sp' instruction for FP saves up
+ above, unless we needed to set the frame pointer in the previous
+ step, or the frame is so large that allocating the whole thing at
+ once would put the FP register save slots out of reach of the
+ addressing mode (128 bytes).
+
+ add -SIZE, sp
One day we might keep the stack pointer constant, that won't
change the code for prologues, but it will make the frame
save instructions.
MY_FRAME_IN_FP: The base of the current frame is in the
- frame pointer register ($a2).
+ frame pointer register ($a3).
NO_MORE_FRAMES: Set this if the current frame is "start" or
if the first instruction looks like mov <imm>,sp. This tells
/* Use the PC in the frame if it's provided to look up the
start of this function. */
- pc = (fi ? fi->pc : pc);
+ pc = (fi ? get_frame_pc (fi) : pc);
/* Find the start of this function. */
status = find_pc_partial_function (pc, &name, &func_addr, &func_end);
{
if (fi->next == NULL)
fi->frame = read_sp ();
- return fi->pc;
+ return get_frame_pc (fi);
}
/* Similarly if we're stopped on the first insn of a prologue as our
frame hasn't been allocated yet. */
- if (fi && fi->pc == func_addr)
+ if (fi && get_frame_pc (fi) == func_addr)
{
if (fi->next == NULL)
fi->frame = read_sp ();
- return fi->pc;
+ return get_frame_pc (fi);
}
/* Figure out where to stop scanning. */
- stop = fi ? fi->pc : func_end;
+ stop = fi ? get_frame_pc (fi) : func_end;
/* Don't walk off the end of the function. */
stop = stop > func_end ? func_end : stop;
return addr;
}
- /* First see if this insn sets the stack pointer; if so, it's something
- we won't understand, so quit now. */
+ /* First see if this insn sets the stack pointer from a register; if
+ so, it's probably the initialization of the stack pointer in _start,
+ so mark this as the bottom-most frame. */
if (buf[0] == 0xf2 && (buf[1] & 0xf3) == 0xf0)
{
if (fi)
/* Reserve four bytes for every register saved. */
for (i = 0; i < NUM_REGS; i++)
- if (fi->saved_regs[i])
+ if (get_frame_saved_regs (fi)[i])
adjust += 4;
/* If we saved LIR, then it's most likely we used a `movm'
instruction with the `other' bit set, in which case the SP is
decremented by an extra four bytes, "to simplify calculation
of the transfer area", according to the processor manual. */
- if (fi->saved_regs[LIR_REGNUM])
+ if (get_frame_saved_regs (fi)[LIR_REGNUM])
adjust += 4;
return adjust;
{
/* Our caller has a frame pointer. So find the frame in $a3 or
in the stack. */
- if (fi->saved_regs[A3_REGNUM])
- return (read_memory_integer (fi->saved_regs[A3_REGNUM], REGISTER_SIZE));
+ if (get_frame_saved_regs (fi)[A3_REGNUM])
+ return (read_memory_integer (get_frame_saved_regs (fi)[A3_REGNUM], REGISTER_SIZE));
else
return read_register (A3_REGNUM);
}
/* Restore any saved registers. */
for (regnum = 0; regnum < NUM_REGS; regnum++)
- if (frame->saved_regs[regnum] != 0)
+ if (get_frame_saved_regs (frame)[regnum] != 0)
{
ULONGEST value;
- value = read_memory_unsigned_integer (frame->saved_regs[regnum],
+ value = read_memory_unsigned_integer (get_frame_saved_regs (frame)[regnum],
REGISTER_RAW_SIZE (regnum));
write_register (regnum, value);
}
/* Actually cut back the stack. */
- write_register (SP_REGNUM, FRAME_FP (frame));
+ write_register (SP_REGNUM, get_frame_base (frame));
/* Don't we need to set the PC?!? XXX FIXME. */
}
registers. Most of the work is done in mn10300_analyze_prologue().
Note that when we are called for the last frame (currently active frame),
- that fi->pc and fi->frame will already be setup. However, fi->frame will
+ that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will
be valid only if this routine uses FP. For previous frames, fi-frame will
always be correct. mn10300_analyze_prologue will fix fi->frame if
it's not valid.
mn10300_init_extra_frame_info (int fromleaf, struct frame_info *fi)
{
if (fi->next)
- fi->pc = FRAME_SAVED_PC (fi->next);
+ deprecated_update_frame_pc_hack (fi, FRAME_SAVED_PC (fi->next));
frame_saved_regs_zalloc (fi);
fi->extra_info = (struct frame_extra_info *)
printf_filtered ("%s: ", name);
/* Get the data */
- if (read_relative_register_raw_bytes (regnum, raw_buffer))
+ if (!frame_register_read (deprecated_selected_frame, regnum, raw_buffer))
{
printf_filtered ("[invalid]");
return;
else
{
int byte;
- if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
{
for (byte = REGISTER_RAW_SIZE (regnum) - REGISTER_VIRTUAL_SIZE (regnum);
byte < REGISTER_RAW_SIZE (regnum);
set_gdbarch_register_virtual_size (gdbarch, mn10300_register_virtual_size);
set_gdbarch_register_virtual_type (gdbarch, mn10300_register_virtual_type);
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, mn10300_dwarf2_reg_to_regnum);
- set_gdbarch_do_registers_info (gdbarch, mn10300_do_registers_info);
+ set_gdbarch_deprecated_do_registers_info (gdbarch, mn10300_do_registers_info);
set_gdbarch_sp_regnum (gdbarch, 8);
set_gdbarch_pc_regnum (gdbarch, 9);
set_gdbarch_fp_regnum (gdbarch, 31);
set_gdbarch_decr_pc_after_break (gdbarch, 0);
/* Stack unwinding. */
- set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register);
- set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid);
set_gdbarch_saved_pc_after_call (gdbarch, mn10300_saved_pc_after_call);
set_gdbarch_init_extra_frame_info (gdbarch, mn10300_init_extra_frame_info);
- set_gdbarch_init_frame_pc (gdbarch, init_frame_pc_noop);
+ set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_noop);
set_gdbarch_frame_init_saved_regs (gdbarch, mn10300_frame_init_saved_regs);
set_gdbarch_frame_chain (gdbarch, mn10300_frame_chain);
set_gdbarch_frame_saved_pc (gdbarch, mn10300_frame_saved_pc);
- set_gdbarch_extract_return_value (gdbarch, mn10300_extract_return_value);
- set_gdbarch_extract_struct_value_address
+ set_gdbarch_deprecated_extract_return_value (gdbarch, mn10300_extract_return_value);
+ set_gdbarch_deprecated_extract_struct_value_address
(gdbarch, mn10300_extract_struct_value_address);
- set_gdbarch_store_return_value (gdbarch, mn10300_store_return_value);
+ set_gdbarch_deprecated_store_return_value (gdbarch, mn10300_store_return_value);
set_gdbarch_store_struct_return (gdbarch, mn10300_store_struct_return);
set_gdbarch_pop_frame (gdbarch, mn10300_pop_frame);
set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue);
set_gdbarch_frame_args_skip (gdbarch, 0);
- set_gdbarch_frame_args_address (gdbarch, default_frame_address);
- set_gdbarch_frame_locals_address (gdbarch, default_frame_address);
set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
/* That's right, we're using the stack pointer as our frame pointer. */
set_gdbarch_read_fp (gdbarch, generic_target_read_sp);
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
- set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
set_gdbarch_call_dummy_words (gdbarch, mn10300_call_dummy_words);
set_gdbarch_sizeof_call_dummy_words (gdbarch,
set_gdbarch_call_dummy_length (gdbarch, 0);
set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
set_gdbarch_call_dummy_start_offset (gdbarch, 0);
- set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point);
- set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
+ set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point);
set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
set_gdbarch_push_arguments (gdbarch, mn10300_push_arguments);
set_gdbarch_reg_struct_has_addr (gdbarch, mn10300_reg_struct_has_addr);