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binutils-gdb/gdb/mn10200-tdep.c

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// OBSOLETE /* Target-dependent code for the Matsushita MN10200 for GDB, the GNU debugger.
// OBSOLETE
// OBSOLETE Copyright 1997, 1998, 1999, 2000, 2001, 2003 Free Software
// OBSOLETE Foundation, Inc.
// OBSOLETE
// OBSOLETE This file is part of GDB.
// OBSOLETE
// OBSOLETE This program is free software; you can redistribute it and/or modify
// OBSOLETE it under the terms of the GNU General Public License as published by
// OBSOLETE the Free Software Foundation; either version 2 of the License, or
// OBSOLETE (at your option) any later version.
// OBSOLETE
// OBSOLETE This program is distributed in the hope that it will be useful,
// OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of
// OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// OBSOLETE GNU General Public License for more details.
// OBSOLETE
// OBSOLETE You should have received a copy of the GNU General Public License
// OBSOLETE along with this program; if not, write to the Free Software
// OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330,
// OBSOLETE Boston, MA 02111-1307, USA. */
// OBSOLETE
// OBSOLETE #include "defs.h"
// OBSOLETE #include "frame.h"
// OBSOLETE #include "inferior.h"
// OBSOLETE #include "target.h"
// OBSOLETE #include "value.h"
// OBSOLETE #include "bfd.h"
// OBSOLETE #include "gdb_string.h"
// OBSOLETE #include "gdbcore.h"
// OBSOLETE #include "symfile.h"
// OBSOLETE #include "regcache.h"
// OBSOLETE
// OBSOLETE
// OBSOLETE /* Should call_function allocate stack space for a struct return? */
// OBSOLETE int
// OBSOLETE mn10200_use_struct_convention (int gcc_p, struct type *type)
// OBSOLETE {
// OBSOLETE return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8);
// OBSOLETE }
// OBSOLETE /* *INDENT-OFF* */
// OBSOLETE /* The main purpose of this file is dealing with prologues to extract
// OBSOLETE information about stack frames and saved registers.
// OBSOLETE
// OBSOLETE For reference here's how prologues look on the mn10200:
// OBSOLETE
// OBSOLETE With frame pointer:
// OBSOLETE mov fp,a0
// OBSOLETE mov sp,fp
// OBSOLETE add <size>,sp
// OBSOLETE Register saves for d2, d3, a1, a2 as needed. Saves start
// OBSOLETE at fp - <size> + <outgoing_args_size> and work towards higher
// OBSOLETE addresses. Note that the saves are actually done off the stack
// OBSOLETE pointer in the prologue! This makes for smaller code and easier
// OBSOLETE prologue scanning as the displacement fields will unlikely
// OBSOLETE be more than 8 bits!
// OBSOLETE
// OBSOLETE Without frame pointer:
// OBSOLETE add <size>,sp
// OBSOLETE Register saves for d2, d3, a1, a2 as needed. Saves start
// OBSOLETE at sp + <outgoing_args_size> and work towards higher addresses.
// OBSOLETE
// OBSOLETE Out of line prologue:
// OBSOLETE add <local size>,sp -- optional
// OBSOLETE jsr __prologue
// OBSOLETE add <outgoing_size>,sp -- optional
// OBSOLETE
// OBSOLETE The stack pointer remains constant throughout the life of most
// OBSOLETE functions. As a result the compiler will usually omit the
// OBSOLETE frame pointer, so we must handle frame pointerless functions. */
// OBSOLETE
// OBSOLETE /* Analyze the prologue to determine where registers are saved,
// OBSOLETE the end of the prologue, etc etc. Return the end of the prologue
// OBSOLETE scanned.
// OBSOLETE
// OBSOLETE We store into FI (if non-null) several tidbits of information:
// OBSOLETE
// OBSOLETE * stack_size -- size of this stack frame. Note that if we stop in
// OBSOLETE certain parts of the prologue/epilogue we may claim the size of the
// OBSOLETE current frame is zero. This happens when the current frame has
// OBSOLETE not been allocated yet or has already been deallocated.
// OBSOLETE
// OBSOLETE * fsr -- Addresses of registers saved in the stack by this frame.
// OBSOLETE
// OBSOLETE * status -- A (relatively) generic status indicator. It's a bitmask
// OBSOLETE with the following bits:
// OBSOLETE
// OBSOLETE MY_FRAME_IN_SP: The base of the current frame is actually in
// OBSOLETE the stack pointer. This can happen for frame pointerless
// OBSOLETE functions, or cases where we're stopped in the prologue/epilogue
// OBSOLETE itself. For these cases mn10200_analyze_prologue will need up
// OBSOLETE update fi->frame before returning or analyzing the register
// OBSOLETE save instructions.
// OBSOLETE
// OBSOLETE MY_FRAME_IN_FP: The base of the current frame is in the
// OBSOLETE frame pointer register ($a2).
// OBSOLETE
// OBSOLETE CALLER_A2_IN_A0: $a2 from the caller's frame is temporarily
// OBSOLETE in $a0. This can happen if we're stopped in the prologue.
// OBSOLETE
// OBSOLETE NO_MORE_FRAMES: Set this if the current frame is "start" or
// OBSOLETE if the first instruction looks like mov <imm>,sp. This tells
// OBSOLETE frame chain to not bother trying to unwind past this frame. */
// OBSOLETE /* *INDENT-ON* */
// OBSOLETE
// OBSOLETE
// OBSOLETE
// OBSOLETE
// OBSOLETE #define MY_FRAME_IN_SP 0x1
// OBSOLETE #define MY_FRAME_IN_FP 0x2
// OBSOLETE #define CALLER_A2_IN_A0 0x4
// OBSOLETE #define NO_MORE_FRAMES 0x8
// OBSOLETE
// OBSOLETE static CORE_ADDR
// OBSOLETE mn10200_analyze_prologue (struct frame_info *fi, CORE_ADDR pc)
// OBSOLETE {
// OBSOLETE CORE_ADDR func_addr, func_end, addr, stop;
// OBSOLETE CORE_ADDR stack_size = 0;
// OBSOLETE unsigned char buf[4];
// OBSOLETE int status;
// OBSOLETE char *name;
// OBSOLETE int out_of_line_prologue = 0;
// OBSOLETE
// OBSOLETE /* Use the PC in the frame if it's provided to look up the
// OBSOLETE start of this function. */
// OBSOLETE pc = (fi ? get_frame_pc (fi) : pc);
// OBSOLETE
// OBSOLETE /* Find the start of this function. */
// OBSOLETE status = find_pc_partial_function (pc, &name, &func_addr, &func_end);
// OBSOLETE
// OBSOLETE /* Do nothing if we couldn't find the start of this function or if we're
// OBSOLETE stopped at the first instruction in the prologue. */
// OBSOLETE if (status == 0)
// OBSOLETE return pc;
// OBSOLETE
// OBSOLETE /* If we're in start, then give up. */
// OBSOLETE if (strcmp (name, "start") == 0)
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE fi->status = NO_MORE_FRAMES;
// OBSOLETE return pc;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* At the start of a function our frame is in the stack pointer. */
// OBSOLETE if (fi)
// OBSOLETE fi->status = MY_FRAME_IN_SP;
// OBSOLETE
// OBSOLETE /* If we're physically on an RTS instruction, then our frame has already
// OBSOLETE been deallocated.
// OBSOLETE
// OBSOLETE fi->frame is bogus, we need to fix it. */
// OBSOLETE if (fi && get_frame_pc (fi) + 1 == func_end)
// OBSOLETE {
// OBSOLETE status = target_read_memory (get_frame_pc (fi), buf, 1);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return get_frame_pc (fi);
// OBSOLETE }
// OBSOLETE
// OBSOLETE if (buf[0] == 0xfe)
// OBSOLETE {
// OBSOLETE if (get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return get_frame_pc (fi);
// OBSOLETE }
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Similarly if we're stopped on the first insn of a prologue as our
// OBSOLETE frame hasn't been allocated yet. */
// OBSOLETE if (fi && get_frame_pc (fi) == func_addr)
// OBSOLETE {
// OBSOLETE if (get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return get_frame_pc (fi);
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Figure out where to stop scanning. */
// OBSOLETE stop = fi ? get_frame_pc (fi) : func_end;
// OBSOLETE
// OBSOLETE /* Don't walk off the end of the function. */
// OBSOLETE stop = stop > func_end ? func_end : stop;
// OBSOLETE
// OBSOLETE /* Start scanning on the first instruction of this function. */
// OBSOLETE addr = func_addr;
// OBSOLETE
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && fi->status & MY_FRAME_IN_SP)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* First see if this insn sets the stack pointer; if so, it's something
// OBSOLETE we won't understand, so quit now. */
// OBSOLETE if (buf[0] == 0xdf
// OBSOLETE || (buf[0] == 0xf4 && buf[1] == 0x77))
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE fi->status = NO_MORE_FRAMES;
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Now see if we have a frame pointer.
// OBSOLETE
// OBSOLETE Search for mov a2,a0 (0xf278)
// OBSOLETE then mov a3,a2 (0xf27e). */
// OBSOLETE
// OBSOLETE if (buf[0] == 0xf2 && buf[1] == 0x78)
// OBSOLETE {
// OBSOLETE /* Our caller's $a2 will be found in $a0 now. Note it for
// OBSOLETE our callers. */
// OBSOLETE if (fi)
// OBSOLETE fi->status |= CALLER_A2_IN_A0;
// OBSOLETE addr += 2;
// OBSOLETE if (addr >= stop)
// OBSOLETE {
// OBSOLETE /* We still haven't allocated our local stack. Handle this
// OBSOLETE as if we stopped on the first or last insn of a function. */
// OBSOLETE if (fi && get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE if (buf[0] == 0xf2 && buf[1] == 0x7e)
// OBSOLETE {
// OBSOLETE addr += 2;
// OBSOLETE
// OBSOLETE /* Our frame pointer is valid now. */
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE fi->status |= MY_FRAME_IN_FP;
// OBSOLETE fi->status &= ~MY_FRAME_IN_SP;
// OBSOLETE }
// OBSOLETE if (addr >= stop)
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE else
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Next we should allocate the local frame.
// OBSOLETE
// OBSOLETE Search for add imm8,a3 (0xd3XX)
// OBSOLETE or add imm16,a3 (0xf70bXXXX)
// OBSOLETE or add imm24,a3 (0xf467XXXXXX).
// OBSOLETE
// OBSOLETE If none of the above was found, then this prologue has
// OBSOLETE no stack, and therefore can't have any register saves,
// OBSOLETE so quit now. */
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE if (buf[0] == 0xd3)
// OBSOLETE {
// OBSOLETE stack_size = extract_signed_integer (&buf[1], 1);
// OBSOLETE if (fi)
// OBSOLETE fi->stack_size = stack_size;
// OBSOLETE addr += 2;
// OBSOLETE if (addr >= stop)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size);
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE else if (buf[0] == 0xf7 && buf[1] == 0x0b)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 2, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE stack_size = extract_signed_integer (buf, 2);
// OBSOLETE if (fi)
// OBSOLETE fi->stack_size = stack_size;
// OBSOLETE addr += 4;
// OBSOLETE if (addr >= stop)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size);
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0x67)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 2, buf, 3);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE stack_size = extract_signed_integer (buf, 3);
// OBSOLETE if (fi)
// OBSOLETE fi->stack_size = stack_size;
// OBSOLETE addr += 5;
// OBSOLETE if (addr >= stop)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - stack_size);
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Now see if we have a call to __prologue for an out of line
// OBSOLETE prologue. */
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE
// OBSOLETE /* First check for 16bit pc-relative call to __prologue. */
// OBSOLETE if (buf[0] == 0xfd)
// OBSOLETE {
// OBSOLETE CORE_ADDR temp;
// OBSOLETE status = target_read_memory (addr + 1, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Get the PC this instruction will branch to. */
// OBSOLETE temp = (extract_signed_integer (buf, 2) + addr + 3) & 0xffffff;
// OBSOLETE
// OBSOLETE /* Get the name of the function at the target address. */
// OBSOLETE status = find_pc_partial_function (temp, &name, NULL, NULL);
// OBSOLETE if (status == 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Note if it is an out of line prologue. */
// OBSOLETE out_of_line_prologue = (strcmp (name, "__prologue") == 0);
// OBSOLETE
// OBSOLETE /* This sucks up 3 bytes of instruction space. */
// OBSOLETE if (out_of_line_prologue)
// OBSOLETE addr += 3;
// OBSOLETE
// OBSOLETE if (addr >= stop)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL)
// OBSOLETE {
// OBSOLETE fi->stack_size -= 16;
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size);
// OBSOLETE }
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE /* Now check for the 24bit pc-relative call to __prologue. */
// OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0xe1)
// OBSOLETE {
// OBSOLETE CORE_ADDR temp;
// OBSOLETE status = target_read_memory (addr + 2, buf, 3);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Get the PC this instruction will branch to. */
// OBSOLETE temp = (extract_signed_integer (buf, 3) + addr + 5) & 0xffffff;
// OBSOLETE
// OBSOLETE /* Get the name of the function at the target address. */
// OBSOLETE status = find_pc_partial_function (temp, &name, NULL, NULL);
// OBSOLETE if (status == 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp ());
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Note if it is an out of line prologue. */
// OBSOLETE out_of_line_prologue = (strcmp (name, "__prologue") == 0);
// OBSOLETE
// OBSOLETE /* This sucks up 5 bytes of instruction space. */
// OBSOLETE if (out_of_line_prologue)
// OBSOLETE addr += 5;
// OBSOLETE
// OBSOLETE if (addr >= stop)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP))
// OBSOLETE {
// OBSOLETE fi->stack_size -= 16;
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size);
// OBSOLETE }
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Now actually handle the out of line prologue. */
// OBSOLETE if (out_of_line_prologue)
// OBSOLETE {
// OBSOLETE int outgoing_args_size = 0;
// OBSOLETE
// OBSOLETE /* First adjust the stack size for this function. The out of
// OBSOLETE line prologue saves 4 registers (16bytes of data). */
// OBSOLETE if (fi)
// OBSOLETE fi->stack_size -= 16;
// OBSOLETE
// OBSOLETE /* Update fi->frame if necessary. */
// OBSOLETE if (fi && get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size);
// OBSOLETE
// OBSOLETE /* After the out of line prologue, there may be another
// OBSOLETE stack adjustment for the outgoing arguments.
// OBSOLETE
// OBSOLETE Search for add imm8,a3 (0xd3XX)
// OBSOLETE or add imm16,a3 (0xf70bXXXX)
// OBSOLETE or add imm24,a3 (0xf467XXXXXX). */
// OBSOLETE
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4;
// OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8;
// OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12;
// OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16;
// OBSOLETE }
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE if (buf[0] == 0xd3)
// OBSOLETE {
// OBSOLETE outgoing_args_size = extract_signed_integer (&buf[1], 1);
// OBSOLETE addr += 2;
// OBSOLETE }
// OBSOLETE else if (buf[0] == 0xf7 && buf[1] == 0x0b)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 2, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4;
// OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8;
// OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12;
// OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16;
// OBSOLETE }
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE outgoing_args_size = extract_signed_integer (buf, 2);
// OBSOLETE addr += 4;
// OBSOLETE }
// OBSOLETE else if (buf[0] == 0xf4 && buf[1] == 0x67)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 2, buf, 3);
// OBSOLETE if (status != 0)
// OBSOLETE {
// OBSOLETE if (fi && get_next_frame (fi) == NULL)
// OBSOLETE {
// OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4;
// OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8;
// OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12;
// OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16;
// OBSOLETE }
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE outgoing_args_size = extract_signed_integer (buf, 3);
// OBSOLETE addr += 5;
// OBSOLETE }
// OBSOLETE else
// OBSOLETE outgoing_args_size = 0;
// OBSOLETE
// OBSOLETE /* Now that we know the size of the outgoing arguments, fix
// OBSOLETE fi->frame again if this is the innermost frame. */
// OBSOLETE if (fi && get_next_frame (fi) == NULL)
// OBSOLETE deprecated_update_frame_base_hack (fi, get_frame_base (fi) - outgoing_args_size);
// OBSOLETE
// OBSOLETE /* Note the register save information and update the stack
// OBSOLETE size for this frame too. */
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE fi->fsr.regs[2] = get_frame_base (fi) + fi->stack_size + 4;
// OBSOLETE fi->fsr.regs[3] = get_frame_base (fi) + fi->stack_size + 8;
// OBSOLETE fi->fsr.regs[5] = get_frame_base (fi) + fi->stack_size + 12;
// OBSOLETE fi->fsr.regs[6] = get_frame_base (fi) + fi->stack_size + 16;
// OBSOLETE fi->stack_size += outgoing_args_size;
// OBSOLETE }
// OBSOLETE /* There can be no more prologue insns, so return now. */
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* At this point fi->frame needs to be correct.
// OBSOLETE
// OBSOLETE If MY_FRAME_IN_SP is set and we're the innermost frame, then we
// OBSOLETE need to fix fi->frame so that backtracing, find_frame_saved_regs,
// OBSOLETE etc work correctly. */
// OBSOLETE if (fi && get_next_frame (fi) == NULL && (fi->status & MY_FRAME_IN_SP) != 0)
// OBSOLETE deprecated_update_frame_base_hack (fi, read_sp () - fi->stack_size);
// OBSOLETE
// OBSOLETE /* And last we have the register saves. These are relatively
// OBSOLETE simple because they're physically done off the stack pointer,
// OBSOLETE and thus the number of different instructions we need to
// OBSOLETE check is greatly reduced because we know the displacements
// OBSOLETE will be small.
// OBSOLETE
// OBSOLETE Search for movx d2,(X,a3) (0xf55eXX)
// OBSOLETE then movx d3,(X,a3) (0xf55fXX)
// OBSOLETE then mov a1,(X,a3) (0x5dXX) No frame pointer case
// OBSOLETE then mov a2,(X,a3) (0x5eXX) No frame pointer case
// OBSOLETE or mov a0,(X,a3) (0x5cXX) Frame pointer case. */
// OBSOLETE
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE if (buf[0] == 0xf5 && buf[1] == 0x5e)
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 2, buf, 1);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE fi->fsr.regs[2] = (get_frame_base (fi) + stack_size
// OBSOLETE + extract_signed_integer (buf, 1));
// OBSOLETE }
// OBSOLETE addr += 3;
// OBSOLETE if (addr >= stop)
// OBSOLETE return addr;
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE if (buf[0] == 0xf5 && buf[1] == 0x5f)
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 2, buf, 1);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE fi->fsr.regs[3] = (get_frame_base (fi) + stack_size
// OBSOLETE + extract_signed_integer (buf, 1));
// OBSOLETE }
// OBSOLETE addr += 3;
// OBSOLETE if (addr >= stop)
// OBSOLETE return addr;
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE if (buf[0] == 0x5d)
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 1, buf, 1);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE fi->fsr.regs[5] = (get_frame_base (fi) + stack_size
// OBSOLETE + extract_signed_integer (buf, 1));
// OBSOLETE }
// OBSOLETE addr += 2;
// OBSOLETE if (addr >= stop)
// OBSOLETE return addr;
// OBSOLETE status = target_read_memory (addr, buf, 2);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE if (buf[0] == 0x5e || buf[0] == 0x5c)
// OBSOLETE {
// OBSOLETE if (fi)
// OBSOLETE {
// OBSOLETE status = target_read_memory (addr + 1, buf, 1);
// OBSOLETE if (status != 0)
// OBSOLETE return addr;
// OBSOLETE fi->fsr.regs[6] = (get_frame_base (fi) + stack_size
// OBSOLETE + extract_signed_integer (buf, 1));
// OBSOLETE fi->status &= ~CALLER_A2_IN_A0;
// OBSOLETE }
// OBSOLETE addr += 2;
// OBSOLETE if (addr >= stop)
// OBSOLETE return addr;
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE return addr;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: frame_chain
// OBSOLETE Figure out and return the caller's frame pointer given current
// OBSOLETE frame_info struct.
// OBSOLETE
// OBSOLETE We don't handle dummy frames yet but we would probably just return the
// OBSOLETE stack pointer that was in use at the time the function call was made? */
// OBSOLETE
// OBSOLETE CORE_ADDR
// OBSOLETE mn10200_frame_chain (struct frame_info *fi)
// OBSOLETE {
// OBSOLETE struct frame_info *dummy_frame = deprecated_frame_xmalloc ();
// OBSOLETE struct cleanup *old_chain = make_cleanup (xfree, dummy_frame);
// OBSOLETE CORE_ADDR ret;
// OBSOLETE
// OBSOLETE /* Walk through the prologue to determine the stack size,
// OBSOLETE location of saved registers, end of the prologue, etc. */
// OBSOLETE if (fi->status == 0)
// OBSOLETE mn10200_analyze_prologue (fi, (CORE_ADDR) 0);
// OBSOLETE
// OBSOLETE /* Quit now if mn10200_analyze_prologue set NO_MORE_FRAMES. */
// OBSOLETE if (fi->status & NO_MORE_FRAMES)
// OBSOLETE return 0;
// OBSOLETE
// OBSOLETE /* Now that we've analyzed our prologue, determine the frame
// OBSOLETE pointer for our caller.
// OBSOLETE
// OBSOLETE If our caller has a frame pointer, then we need to
// OBSOLETE find the entry value of $a2 to our function.
// OBSOLETE
// OBSOLETE If CALLER_A2_IN_A0, then the chain is in $a0.
// OBSOLETE
// OBSOLETE If fsr.regs[6] is nonzero, then it's at the memory
// OBSOLETE location pointed to by fsr.regs[6].
// OBSOLETE
// OBSOLETE Else it's still in $a2.
// OBSOLETE
// OBSOLETE If our caller does not have a frame pointer, then his
// OBSOLETE frame base is fi->frame + -caller's stack size + 4. */
// OBSOLETE
// OBSOLETE /* The easiest way to get that info is to analyze our caller's frame.
// OBSOLETE
// OBSOLETE So we set up a dummy frame and call mn10200_analyze_prologue to
// OBSOLETE find stuff for us. */
// OBSOLETE deprecated_update_frame_pc_hack (dummy_frame, FRAME_SAVED_PC (fi));
// OBSOLETE deprecated_update_frame_base_hack (dummy_frame, get_frame_base (fi));
// OBSOLETE memset (dummy_frame->fsr.regs, '\000', sizeof dummy_frame->fsr.regs);
// OBSOLETE dummy_frame->status = 0;
// OBSOLETE dummy_frame->stack_size = 0;
// OBSOLETE mn10200_analyze_prologue (dummy_frame, 0);
// OBSOLETE
// OBSOLETE if (dummy_frame->status & MY_FRAME_IN_FP)
// OBSOLETE {
// OBSOLETE /* Our caller has a frame pointer. So find the frame in $a2, $a0,
// OBSOLETE or in the stack. */
// OBSOLETE if (fi->fsr.regs[6])
// OBSOLETE ret = (read_memory_integer (fi->fsr.regs[FP_REGNUM], REGISTER_SIZE)
// OBSOLETE & 0xffffff);
// OBSOLETE else if (fi->status & CALLER_A2_IN_A0)
// OBSOLETE ret = read_register (4);
// OBSOLETE else
// OBSOLETE ret = read_register (FP_REGNUM);
// OBSOLETE }
// OBSOLETE else
// OBSOLETE {
// OBSOLETE /* Our caller does not have a frame pointer. So his frame starts
// OBSOLETE at the base of our frame (fi->frame) + <his size> + 4 (saved pc). */
// OBSOLETE ret = get_frame_base (fi) + -dummy_frame->stack_size + 4;
// OBSOLETE }
// OBSOLETE do_cleanups (old_chain);
// OBSOLETE return ret;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: skip_prologue
// OBSOLETE Return the address of the first inst past the prologue of the function. */
// OBSOLETE
// OBSOLETE CORE_ADDR
// OBSOLETE mn10200_skip_prologue (CORE_ADDR pc)
// OBSOLETE {
// OBSOLETE /* We used to check the debug symbols, but that can lose if
// OBSOLETE we have a null prologue. */
// OBSOLETE return mn10200_analyze_prologue (NULL, pc);
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: pop_frame
// OBSOLETE This routine gets called when either the user uses the `return'
// OBSOLETE command, or the call dummy breakpoint gets hit. */
// OBSOLETE
// OBSOLETE void
// OBSOLETE mn10200_pop_frame (struct frame_info *frame)
// OBSOLETE {
// OBSOLETE int regnum;
// OBSOLETE
// OBSOLETE if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
// OBSOLETE get_frame_base (frame),
// OBSOLETE get_frame_base (frame)))
// OBSOLETE generic_pop_dummy_frame ();
// OBSOLETE else
// OBSOLETE {
// OBSOLETE write_register (PC_REGNUM, FRAME_SAVED_PC (frame));
// OBSOLETE
// OBSOLETE /* Restore any saved registers. */
// OBSOLETE for (regnum = 0; regnum < NUM_REGS; regnum++)
// OBSOLETE if (frame->fsr.regs[regnum] != 0)
// OBSOLETE {
// OBSOLETE ULONGEST value;
// OBSOLETE
// OBSOLETE value = read_memory_unsigned_integer (frame->fsr.regs[regnum],
// OBSOLETE REGISTER_RAW_SIZE (regnum));
// OBSOLETE write_register (regnum, value);
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Actually cut back the stack. */
// OBSOLETE write_register (SP_REGNUM, get_frame_base (frame));
// OBSOLETE
// OBSOLETE /* Don't we need to set the PC?!? XXX FIXME. */
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Throw away any cached frame information. */
// OBSOLETE flush_cached_frames ();
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: push_arguments
// OBSOLETE Setup arguments for a call to the target. Arguments go in
// OBSOLETE order on the stack. */
// OBSOLETE
// OBSOLETE CORE_ADDR
// OBSOLETE mn10200_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
// OBSOLETE unsigned char struct_return, CORE_ADDR struct_addr)
// OBSOLETE {
// OBSOLETE int argnum = 0;
// OBSOLETE int len = 0;
// OBSOLETE int stack_offset = 0;
// OBSOLETE int regsused = struct_return ? 1 : 0;
// OBSOLETE
// OBSOLETE /* This should be a nop, but align the stack just in case something
// OBSOLETE went wrong. Stacks are two byte aligned on the mn10200. */
// OBSOLETE sp &= ~1;
// OBSOLETE
// OBSOLETE /* Now make space on the stack for the args.
// OBSOLETE
// OBSOLETE XXX This doesn't appear to handle pass-by-invisible reference
// OBSOLETE arguments. */
// OBSOLETE for (argnum = 0; argnum < nargs; argnum++)
// OBSOLETE {
// OBSOLETE int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 1) & ~1;
// OBSOLETE
// OBSOLETE /* If we've used all argument registers, then this argument is
// OBSOLETE pushed. */
// OBSOLETE if (regsused >= 2 || arg_length > 4)
// OBSOLETE {
// OBSOLETE regsused = 2;
// OBSOLETE len += arg_length;
// OBSOLETE }
// OBSOLETE /* We know we've got some arg register space left. If this argument
// OBSOLETE will fit entirely in regs, then put it there. */
// OBSOLETE else if (arg_length <= 2
// OBSOLETE || TYPE_CODE (VALUE_TYPE (args[argnum])) == TYPE_CODE_PTR)
// OBSOLETE {
// OBSOLETE regsused++;
// OBSOLETE }
// OBSOLETE else if (regsused == 0)
// OBSOLETE {
// OBSOLETE regsused = 2;
// OBSOLETE }
// OBSOLETE else
// OBSOLETE {
// OBSOLETE regsused = 2;
// OBSOLETE len += arg_length;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Allocate stack space. */
// OBSOLETE sp -= len;
// OBSOLETE
// OBSOLETE regsused = struct_return ? 1 : 0;
// OBSOLETE /* Push all arguments onto the stack. */
// OBSOLETE for (argnum = 0; argnum < nargs; argnum++)
// OBSOLETE {
// OBSOLETE int len;
// OBSOLETE char *val;
// OBSOLETE
// OBSOLETE /* XXX Check this. What about UNIONS? */
// OBSOLETE if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT
// OBSOLETE && TYPE_LENGTH (VALUE_TYPE (*args)) > 8)
// OBSOLETE {
// OBSOLETE /* XXX Wrong, we want a pointer to this argument. */
// OBSOLETE len = TYPE_LENGTH (VALUE_TYPE (*args));
// OBSOLETE val = (char *) VALUE_CONTENTS (*args);
// OBSOLETE }
// OBSOLETE else
// OBSOLETE {
// OBSOLETE len = TYPE_LENGTH (VALUE_TYPE (*args));
// OBSOLETE val = (char *) VALUE_CONTENTS (*args);
// OBSOLETE }
// OBSOLETE
// OBSOLETE if (regsused < 2
// OBSOLETE && (len <= 2
// OBSOLETE || TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_PTR))
// OBSOLETE {
// OBSOLETE write_register (regsused, extract_unsigned_integer (val, 4));
// OBSOLETE regsused++;
// OBSOLETE }
// OBSOLETE else if (regsused == 0 && len == 4)
// OBSOLETE {
// OBSOLETE write_register (regsused, extract_unsigned_integer (val, 2));
// OBSOLETE write_register (regsused + 1, extract_unsigned_integer (val + 2, 2));
// OBSOLETE regsused = 2;
// OBSOLETE }
// OBSOLETE else
// OBSOLETE {
// OBSOLETE regsused = 2;
// OBSOLETE while (len > 0)
// OBSOLETE {
// OBSOLETE write_memory (sp + stack_offset, val, 2);
// OBSOLETE
// OBSOLETE len -= 2;
// OBSOLETE val += 2;
// OBSOLETE stack_offset += 2;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE args++;
// OBSOLETE }
// OBSOLETE
// OBSOLETE return sp;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: push_return_address (pc)
// OBSOLETE Set up the return address for the inferior function call.
// OBSOLETE Needed for targets where we don't actually execute a JSR/BSR instruction */
// OBSOLETE
// OBSOLETE CORE_ADDR
// OBSOLETE mn10200_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
// OBSOLETE {
// OBSOLETE unsigned char buf[4];
// OBSOLETE
// OBSOLETE store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ());
// OBSOLETE write_memory (sp - 4, buf, 4);
// OBSOLETE return sp - 4;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: store_struct_return (addr,sp)
// OBSOLETE Store the structure value return address for an inferior function
// OBSOLETE call. */
// OBSOLETE
// OBSOLETE CORE_ADDR
// OBSOLETE mn10200_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
// OBSOLETE {
// OBSOLETE /* The structure return address is passed as the first argument. */
// OBSOLETE write_register (0, addr);
// OBSOLETE return sp;
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: frame_saved_pc
// OBSOLETE Find the caller of this frame. We do this by seeing if RP_REGNUM
// OBSOLETE is saved in the stack anywhere, otherwise we get it from the
// OBSOLETE registers. If the inner frame is a dummy frame, return its PC
// OBSOLETE instead of RP, because that's where "caller" of the dummy-frame
// OBSOLETE will be found. */
// OBSOLETE
// OBSOLETE CORE_ADDR
// OBSOLETE mn10200_frame_saved_pc (struct frame_info *fi)
// OBSOLETE {
// OBSOLETE /* The saved PC will always be at the base of the current frame. */
// OBSOLETE return (read_memory_integer (get_frame_base (fi), REGISTER_SIZE) & 0xffffff);
// OBSOLETE }
// OBSOLETE
// OBSOLETE /* Function: init_extra_frame_info
// OBSOLETE Setup the frame's frame pointer, pc, and frame addresses for saved
// OBSOLETE registers. Most of the work is done in mn10200_analyze_prologue().
// OBSOLETE
// OBSOLETE Note that when we are called for the last frame (currently active frame),
// OBSOLETE that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will
// OBSOLETE be valid only if this routine uses FP. For previous frames, fi-frame will
// OBSOLETE always be correct. mn10200_analyze_prologue will fix fi->frame if
// OBSOLETE it's not valid.
// OBSOLETE
// OBSOLETE We can be called with the PC in the call dummy under two circumstances.
// OBSOLETE First, during normal backtracing, second, while figuring out the frame
// OBSOLETE pointer just prior to calling the target function (see run_stack_dummy). */
// OBSOLETE
// OBSOLETE void
// OBSOLETE mn10200_init_extra_frame_info (struct frame_info *fi)
// OBSOLETE {
// OBSOLETE if (get_next_frame (fi))
// OBSOLETE deprecated_update_frame_pc_hack (fi, FRAME_SAVED_PC (get_next_frame (fi)));
// OBSOLETE
// OBSOLETE memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs);
// OBSOLETE fi->status = 0;
// OBSOLETE fi->stack_size = 0;
// OBSOLETE
// OBSOLETE mn10200_analyze_prologue (fi, 0);
// OBSOLETE }
// OBSOLETE
// OBSOLETE void
// OBSOLETE _initialize_mn10200_tdep (void)
// OBSOLETE {
// OBSOLETE tm_print_insn = print_insn_mn10200;
// OBSOLETE }
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