/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
Copyright 1996, 1997, 1998 Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 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.
+ 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. */
+ 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 "frame.h"
#include "gdbcore.h"
#include "symfile.h"
-static CORE_ADDR mn10300_analyze_prologue PARAMS ((struct frame_info *fi,
- CORE_ADDR pc));
+static CORE_ADDR mn10300_analyze_prologue PARAMS ((struct frame_info * fi,
+ CORE_ADDR pc));
/* Additional info used by the frame */
struct frame_extra_info
-{
- int status;
- int stack_size;
-};
+ {
+ int status;
+ int stack_size;
+ };
-static char *mn10300_generic_register_names[] =
-{ "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
- "sp", "pc", "mdr", "psw", "lir", "lar", "", "",
- "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "fp" };
+static char *mn10300_generic_register_names[] =
+{"d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
+ "sp", "pc", "mdr", "psw", "lir", "lar", "", "",
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "", "fp"};
static char **mn10300_register_names = mn10300_generic_register_names;
CORE_ADDR *bp_addr;
int *bp_size;
{
- static char breakpoint[] = {0xff};
+ static char breakpoint[] =
+ {0xff};
*bp_size = 1;
return breakpoint;
}
static void
fix_frame_pointer (fi, stack_size)
- struct frame_info *fi;
- int stack_size;
+ struct frame_info *fi;
+ int stack_size;
{
if (fi && fi->next == NULL)
{
static void
set_movm_offsets (fi, movm_args)
- struct frame_info *fi;
- int movm_args;
+ struct frame_info *fi;
+ int movm_args;
{
int offset = 0;
For reference here's how prologues look on the mn10300:
- With frame pointer:
- movm [d2,d3,a2,a3],sp
- mov sp,a3
- add <size>,sp
+ With frame pointer:
+ movm [d2,d3,a2,a3],sp
+ mov sp,a3
+ add <size>,sp
- Without frame pointer:
- movm [d2,d3,a2,a3],sp (if needed)
- add <size>,sp
+ Without frame pointer:
+ movm [d2,d3,a2,a3],sp (if needed)
+ 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
pointerless case much more common. */
-
+
/* Analyze the prologue to determine where registers are saved,
the end of the prologue, etc etc. Return the end of the prologue
scanned.
We store into FI (if non-null) several tidbits of information:
- * stack_size -- size of this stack frame. Note that if we stop in
- certain parts of the prologue/epilogue we may claim the size of the
- current frame is zero. This happens when the current frame has
- not been allocated yet or has already been deallocated.
+ * stack_size -- size of this stack frame. Note that if we stop in
+ certain parts of the prologue/epilogue we may claim the size of the
+ current frame is zero. This happens when the current frame has
+ not been allocated yet or has already been deallocated.
- * fsr -- Addresses of registers saved in the stack by this frame.
+ * fsr -- Addresses of registers saved in the stack by this frame.
- * status -- A (relatively) generic status indicator. It's a bitmask
- with the following bits:
+ * status -- A (relatively) generic status indicator. It's a bitmask
+ with the following bits:
- MY_FRAME_IN_SP: The base of the current frame is actually in
- the stack pointer. This can happen for frame pointerless
- functions, or cases where we're stopped in the prologue/epilogue
- itself. For these cases mn10300_analyze_prologue will need up
- update fi->frame before returning or analyzing the register
- save instructions.
+ MY_FRAME_IN_SP: The base of the current frame is actually in
+ the stack pointer. This can happen for frame pointerless
+ functions, or cases where we're stopped in the prologue/epilogue
+ itself. For these cases mn10300_analyze_prologue will need up
+ update fi->frame before returning or analyzing the register
+ save instructions.
- MY_FRAME_IN_FP: The base of the current frame is in the
- frame pointer register ($a2).
+ MY_FRAME_IN_FP: The base of the current frame is in the
+ frame pointer register ($a2).
- NO_MORE_FRAMES: Set this if the current frame is "start" or
- if the first instruction looks like mov <imm>,sp. This tells
- frame chain to not bother trying to unwind past this frame. */
+ NO_MORE_FRAMES: Set this if the current frame is "start" or
+ if the first instruction looks like mov <imm>,sp. This tells
+ frame chain to not bother trying to unwind past this frame. */
static CORE_ADDR
mn10300_analyze_prologue (fi, pc)
- struct frame_info *fi;
- CORE_ADDR pc;
+ struct frame_info *fi;
+ CORE_ADDR pc;
{
CORE_ADDR func_addr, func_end, addr, stop;
CORE_ADDR stack_size;
return addr;
}
}
-
+
/* Next we should allocate the local frame. No more prologue insns
are found after allocating the local frame.
-
+
Search for add imm8,sp (0xf8feXX)
- or add imm16,sp (0xfafeXXXX)
- or add imm32,sp (0xfcfeXXXXXXXX).
-
+ or add imm16,sp (0xfafeXXXX)
+ or add imm32,sp (0xfcfeXXXXXXXX).
+
If none of the above was found, then this prologue has no
additional stack. */
set_movm_offsets (fi, movm_args);
return addr;
}
-
+
/* Function: frame_chain
Figure out and return the caller's frame pointer given current
frame_info struct.
/* Walk through the prologue to determine the stack size,
location of saved registers, end of the prologue, etc. */
if (fi->extra_info->status == 0)
- mn10300_analyze_prologue (fi, (CORE_ADDR)0);
+ mn10300_analyze_prologue (fi, (CORE_ADDR) 0);
/* Quit now if mn10300_analyze_prologue set NO_MORE_FRAMES. */
if (fi->extra_info->status & NO_MORE_FRAMES)
/* Now that we've analyzed our prologue, determine the frame
pointer for our caller.
- If our caller has a frame pointer, then we need to
- find the entry value of $a3 to our function.
+ If our caller has a frame pointer, then we need to
+ find the entry value of $a3 to our function.
+
+ If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory
+ location pointed to by fsr.regs[A3_REGNUM].
- If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory
- location pointed to by fsr.regs[A3_REGNUM].
+ Else it's still in $a3.
- Else it's still in $a3.
+ If our caller does not have a frame pointer, then his
+ frame base is fi->frame + -caller's stack size. */
- If our caller does not have a frame pointer, then his
- frame base is fi->frame + -caller's stack size. */
-
/* The easiest way to get that info is to analyze our caller's frame.
So we set up a dummy frame and call mn10300_analyze_prologue to
find stuff for us. */
adjust += (fi->saved_regs[A3_REGNUM] ? 4 : 0);
/* Our caller does not have a frame pointer. So his frame starts
- at the base of our frame (fi->frame) + register save space
- + <his size>. */
+ at the base of our frame (fi->frame) + register save space
+ + <his size>. */
return fi->frame + adjust + -dummy->extra_info->stack_size;
}
}
{
int regnum;
- if (PC_IN_CALL_DUMMY(frame->pc, frame->frame, frame->frame))
+ if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
generic_pop_dummy_frame ();
else
{
ULONGEST value;
value = read_memory_unsigned_integer (frame->saved_regs[regnum],
- REGISTER_RAW_SIZE (regnum));
+ REGISTER_RAW_SIZE (regnum));
write_register (regnum, value);
}
&& TYPE_LENGTH (VALUE_TYPE (*args)) > 8)
{
/* XXX Wrong, we want a pointer to this argument. */
- len = TYPE_LENGTH (VALUE_TYPE (*args));
- val = (char *)VALUE_CONTENTS (*args);
+ len = TYPE_LENGTH (VALUE_TYPE (*args));
+ val = (char *) VALUE_CONTENTS (*args);
}
else
{
len = TYPE_LENGTH (VALUE_TYPE (*args));
- val = (char *)VALUE_CONTENTS (*args);
+ val = (char *) VALUE_CONTENTS (*args);
}
while (regsused < 2 && len > 0)
/* Function: push_return_address (pc)
Set up the return address for the inferior function call.
Needed for targets where we don't actually execute a JSR/BSR instruction */
-
+
CORE_ADDR
mn10300_push_return_address (pc, sp)
CORE_ADDR pc;
/* Function: store_struct_return (addr,sp)
Store the structure value return address for an inferior function
call. */
-
+
CORE_ADDR
mn10300_store_struct_return (addr, sp)
CORE_ADDR addr;
write_register (0, addr);
return sp;
}
-
+
/* Function: frame_saved_pc
Find the caller of this frame. We do this by seeing if RP_REGNUM
is saved in the stack anywhere, otherwise we get it from the
/* Results will tell us which type of frame it uses. */
if (dummy->extra_info->status & MY_FRAME_IN_SP)
{
- *reg = SP_REGNUM;
+ *reg = SP_REGNUM;
*offset = -(dummy->extra_info->stack_size);
}
else
{
- *reg = A3_REGNUM;
+ *reg = A3_REGNUM;
*offset = 0;
}
}
-
+
/* This can be made more generic later. */
static void
set_machine_hook (filename)
specify_exec_file_hook (set_machine_hook);
}
-
projects / thirdparty / binutils-gdb.git / blobdiff