-/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
-
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
- Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "frame.h"
-#include "inferior.h"
-#include "target.h"
-#include "value.h"
-#include "bfd.h"
-#include "gdb_string.h"
-#include "gdbcore.h"
-#include "symfile.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);
-
-/* mn10300 private data */
-struct gdbarch_tdep
-{
- int am33_mode;
-#define AM33_MODE (gdbarch_tdep (current_gdbarch)->am33_mode)
-};
-
-/* Additional info used by the frame */
-
-struct frame_extra_info
- {
- int status;
- int stack_size;
- };
-
-
-static char *
-register_name (int reg, char **regs, long sizeof_regs)
-{
- if (reg < 0 || reg >= sizeof_regs / sizeof (regs[0]))
- return NULL;
- else
- return regs[reg];
-}
-
-static const char *
-mn10300_generic_register_name (int reg)
-{
- static char *regs[] =
- { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
- "sp", "pc", "mdr", "psw", "lir", "lar", "", "",
- "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "fp"
- };
- return register_name (reg, regs, sizeof regs);
-}
-
-
-static const char *
-am33_register_name (int reg)
-{
- static char *regs[] =
- { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
- "sp", "pc", "mdr", "psw", "lir", "lar", "",
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""
- };
- return register_name (reg, regs, sizeof regs);
-}
-
-static CORE_ADDR
-mn10300_saved_pc_after_call (struct frame_info *fi)
-{
- return read_memory_integer (read_register (SP_REGNUM), 4);
-}
-
-static void
-mn10300_extract_return_value (struct type *type, char *regbuf, char *valbuf)
-{
- if (TYPE_CODE (type) == TYPE_CODE_PTR)
- memcpy (valbuf, regbuf + REGISTER_BYTE (4), TYPE_LENGTH (type));
- else
- memcpy (valbuf, regbuf + REGISTER_BYTE (0), TYPE_LENGTH (type));
-}
-
-static CORE_ADDR
-mn10300_extract_struct_value_address (char *regbuf)
-{
- return extract_address (regbuf + REGISTER_BYTE (4),
- REGISTER_RAW_SIZE (4));
-}
-
-static void
-mn10300_store_return_value (struct type *type, char *valbuf)
-{
- if (TYPE_CODE (type) == TYPE_CODE_PTR)
- deprecated_write_register_bytes (REGISTER_BYTE (4), valbuf,
- TYPE_LENGTH (type));
- else
- deprecated_write_register_bytes (REGISTER_BYTE (0), valbuf,
- TYPE_LENGTH (type));
-}
-
-static struct frame_info *analyze_dummy_frame (CORE_ADDR, CORE_ADDR);
-static struct frame_info *
-analyze_dummy_frame (CORE_ADDR pc, CORE_ADDR frame)
-{
- static struct frame_info *dummy = NULL;
- if (dummy == NULL)
- {
- dummy = xmalloc (sizeof (struct frame_info));
- dummy->saved_regs = xmalloc (SIZEOF_FRAME_SAVED_REGS);
- dummy->extra_info = xmalloc (sizeof (struct frame_extra_info));
- }
- dummy->next = NULL;
- dummy->prev = NULL;
- dummy->pc = pc;
- dummy->frame = frame;
- dummy->extra_info->status = 0;
- dummy->extra_info->stack_size = 0;
- memset (dummy->saved_regs, '\000', SIZEOF_FRAME_SAVED_REGS);
- mn10300_analyze_prologue (dummy, 0);
- return dummy;
-}
-
-/* Values for frame_info.status */
-
-#define MY_FRAME_IN_SP 0x1
-#define MY_FRAME_IN_FP 0x2
-#define NO_MORE_FRAMES 0x4
-
-
-/* Should call_function allocate stack space for a struct return? */
-static int
-mn10300_use_struct_convention (int gcc_p, struct type *type)
-{
- return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8);
-}
-
-/* The breakpoint instruction must be the same size as the smallest
- instruction in the instruction set.
-
- The Matsushita mn10x00 processors have single byte instructions
- so we need a single byte breakpoint. Matsushita hasn't defined
- one, so we defined it ourselves. */
-
-const static unsigned char *
-mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)
-{
- static char breakpoint[] =
- {0xff};
- *bp_size = 1;
- return breakpoint;
-}
-
-
-/* Fix fi->frame if it's bogus at this point. This is a helper
- function for mn10300_analyze_prologue. */
-
-static void
-fix_frame_pointer (struct frame_info *fi, int stack_size)
-{
- if (fi && fi->next == NULL)
- {
- if (fi->extra_info->status & MY_FRAME_IN_SP)
- fi->frame = read_sp () - stack_size;
- else if (fi->extra_info->status & MY_FRAME_IN_FP)
- fi->frame = read_register (A3_REGNUM);
- }
-}
-
-
-/* Set offsets of registers saved by movm instruction.
- This is a helper function for mn10300_analyze_prologue. */
-
-static void
-set_movm_offsets (struct frame_info *fi, int movm_args)
-{
- int offset = 0;
-
- if (fi == NULL || movm_args == 0)
- return;
-
- if (movm_args & movm_other_bit)
- {
- /* 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;
- offset += 32;
- }
- if (movm_args & movm_a3_bit)
- {
- fi->saved_regs[A3_REGNUM] = fi->frame + offset;
- offset += 4;
- }
- if (movm_args & movm_a2_bit)
- {
- fi->saved_regs[A2_REGNUM] = fi->frame + offset;
- offset += 4;
- }
- if (movm_args & movm_d3_bit)
- {
- fi->saved_regs[D3_REGNUM] = fi->frame + offset;
- offset += 4;
- }
- if (movm_args & movm_d2_bit)
- {
- fi->saved_regs[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;
- 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;
- 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;
- offset += 8;
- }
- }
-}
-
-
-/* The main purpose of this file is dealing with prologues to extract
- information about stack frames and saved registers.
-
- 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.
-
- mov sp, a3
-
- + 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
- 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.
-
- * 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:
-
- 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 ($a3).
-
- 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 (struct frame_info *fi, CORE_ADDR pc)
-{
- CORE_ADDR func_addr, func_end, addr, stop;
- CORE_ADDR stack_size;
- int imm_size;
- unsigned char buf[4];
- int status, movm_args = 0;
- char *name;
-
- /* Use the PC in the frame if it's provided to look up the
- start of this function. */
- pc = (fi ? fi->pc : pc);
-
- /* Find the start of this function. */
- status = find_pc_partial_function (pc, &name, &func_addr, &func_end);
-
- /* Do nothing if we couldn't find the start of this function or if we're
- stopped at the first instruction in the prologue. */
- if (status == 0)
- {
- return pc;
- }
-
- /* If we're in start, then give up. */
- if (strcmp (name, "start") == 0)
- {
- if (fi != NULL)
- fi->extra_info->status = NO_MORE_FRAMES;
- return pc;
- }
-
- /* At the start of a function our frame is in the stack pointer. */
- if (fi)
- fi->extra_info->status = MY_FRAME_IN_SP;
-
- /* Get the next two bytes into buf, we need two because rets is a two
- byte insn and the first isn't enough to uniquely identify it. */
- status = read_memory_nobpt (pc, buf, 2);
- if (status != 0)
- return pc;
-
- /* If we're physically on an "rets" instruction, then our frame has
- already been deallocated. Note this can also be true for retf
- and ret if they specify a size of zero.
-
- In this case fi->frame is bogus, we need to fix it. */
- if (fi && buf[0] == 0xf0 && buf[1] == 0xfc)
- {
- if (fi->next == NULL)
- fi->frame = read_sp ();
- return fi->pc;
- }
-
- /* 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->next == NULL)
- fi->frame = read_sp ();
- return fi->pc;
- }
-
- /* Figure out where to stop scanning. */
- stop = fi ? fi->pc : func_end;
-
- /* Don't walk off the end of the function. */
- stop = stop > func_end ? func_end : stop;
-
- /* Start scanning on the first instruction of this function. */
- addr = func_addr;
-
- /* Suck in two bytes. */
- status = read_memory_nobpt (addr, buf, 2);
- if (status != 0)
- {
- fix_frame_pointer (fi, 0);
- return addr;
- }
-
- /* 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)
- fi->extra_info->status = NO_MORE_FRAMES;
- return addr;
- }
-
- /* Now look for movm [regs],sp, which saves the callee saved registers.
-
- At this time we don't know if fi->frame is valid, so we only note
- that we encountered a movm instruction. Later, we'll set the entries
- in fsr.regs as needed. */
- if (buf[0] == 0xcf)
- {
- /* Extract the register list for the movm instruction. */
- status = read_memory_nobpt (addr + 1, buf, 1);
- movm_args = *buf;
-
- addr += 2;
-
- /* Quit now if we're beyond the stop point. */
- if (addr >= stop)
- {
- /* Fix fi->frame since it's bogus at this point. */
- if (fi && fi->next == NULL)
- fi->frame = read_sp ();
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- return addr;
- }
-
- /* Get the next two bytes so the prologue scan can continue. */
- status = read_memory_nobpt (addr, buf, 2);
- if (status != 0)
- {
- /* Fix fi->frame since it's bogus at this point. */
- if (fi && fi->next == NULL)
- fi->frame = read_sp ();
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- return addr;
- }
- }
-
- /* Now see if we set up a frame pointer via "mov sp,a3" */
- if (buf[0] == 0x3f)
- {
- addr += 1;
-
- /* The frame pointer is now valid. */
- if (fi)
- {
- fi->extra_info->status |= MY_FRAME_IN_FP;
- fi->extra_info->status &= ~MY_FRAME_IN_SP;
- }
-
- /* Quit now if we're beyond the stop point. */
- if (addr >= stop)
- {
- /* Fix fi->frame if it's bogus at this point. */
- fix_frame_pointer (fi, 0);
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- return addr;
- }
-
- /* Get two more bytes so scanning can continue. */
- status = read_memory_nobpt (addr, buf, 2);
- if (status != 0)
- {
- /* Fix fi->frame if it's bogus at this point. */
- fix_frame_pointer (fi, 0);
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- 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).
-
- If none of the above was found, then this prologue has no
- additional stack. */
-
- status = read_memory_nobpt (addr, buf, 2);
- if (status != 0)
- {
- /* Fix fi->frame if it's bogus at this point. */
- fix_frame_pointer (fi, 0);
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- return addr;
- }
-
- imm_size = 0;
- if (buf[0] == 0xf8 && buf[1] == 0xfe)
- imm_size = 1;
- else if (buf[0] == 0xfa && buf[1] == 0xfe)
- imm_size = 2;
- else if (buf[0] == 0xfc && buf[1] == 0xfe)
- imm_size = 4;
-
- if (imm_size != 0)
- {
- /* Suck in imm_size more bytes, they'll hold the size of the
- current frame. */
- status = read_memory_nobpt (addr + 2, buf, imm_size);
- if (status != 0)
- {
- /* Fix fi->frame if it's bogus at this point. */
- fix_frame_pointer (fi, 0);
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- return addr;
- }
-
- /* Note the size of the stack in the frame info structure. */
- stack_size = extract_signed_integer (buf, imm_size);
- if (fi)
- fi->extra_info->stack_size = stack_size;
-
- /* We just consumed 2 + imm_size bytes. */
- addr += 2 + imm_size;
-
- /* No more prologue insns follow, so begin preparation to return. */
- /* Fix fi->frame if it's bogus at this point. */
- fix_frame_pointer (fi, stack_size);
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- return addr;
- }
-
- /* We never found an insn which allocates local stack space, regardless
- this is the end of the prologue. */
- /* Fix fi->frame if it's bogus at this point. */
- fix_frame_pointer (fi, 0);
-
- /* Note if/where callee saved registers were saved. */
- set_movm_offsets (fi, movm_args);
- return addr;
-}
-
-
-/* Function: saved_regs_size
- Return the size in bytes of the register save area, based on the
- saved_regs array in FI. */
-static int
-saved_regs_size (struct frame_info *fi)
-{
- int adjust = 0;
- int i;
-
- /* Reserve four bytes for every register saved. */
- for (i = 0; i < NUM_REGS; i++)
- if (fi->saved_regs[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])
- adjust += 4;
-
- return adjust;
-}
-
-
-/* Function: frame_chain
- Figure out and return the caller's frame pointer given current
- frame_info struct.
-
- We don't handle dummy frames yet but we would probably just return the
- stack pointer that was in use at the time the function call was made? */
-
-static CORE_ADDR
-mn10300_frame_chain (struct frame_info *fi)
-{
- struct frame_info *dummy;
- /* 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);
-
- /* Quit now if mn10300_analyze_prologue set NO_MORE_FRAMES. */
- if (fi->extra_info->status & NO_MORE_FRAMES)
- return 0;
-
- /* 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 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.
-
- 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. */
- dummy = analyze_dummy_frame (FRAME_SAVED_PC (fi), fi->frame);
-
- if (dummy->extra_info->status & MY_FRAME_IN_FP)
- {
- /* 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));
- else
- return read_register (A3_REGNUM);
- }
- else
- {
- int adjust = saved_regs_size (fi);
-
- /* 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>. */
- return fi->frame + adjust + -dummy->extra_info->stack_size;
- }
-}
-
-/* Function: skip_prologue
- Return the address of the first inst past the prologue of the function. */
-
-static CORE_ADDR
-mn10300_skip_prologue (CORE_ADDR pc)
-{
- /* We used to check the debug symbols, but that can lose if
- we have a null prologue. */
- return mn10300_analyze_prologue (NULL, pc);
-}
-
-/* generic_pop_current_frame calls this function if the current
- frame isn't a dummy frame. */
-static void
-mn10300_pop_frame_regular (struct frame_info *frame)
-{
- int regnum;
-
- write_register (PC_REGNUM, FRAME_SAVED_PC (frame));
-
- /* Restore any saved registers. */
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- if (frame->saved_regs[regnum] != 0)
- {
- ULONGEST value;
-
- value = read_memory_unsigned_integer (frame->saved_regs[regnum],
- REGISTER_RAW_SIZE (regnum));
- write_register (regnum, value);
- }
-
- /* Actually cut back the stack. */
- write_register (SP_REGNUM, FRAME_FP (frame));
-
- /* Don't we need to set the PC?!? XXX FIXME. */
-}
-
-/* Function: pop_frame
- This routine gets called when either the user uses the `return'
- command, or the call dummy breakpoint gets hit. */
-static void
-mn10300_pop_frame (void)
-{
- /* This function checks for and handles generic dummy frames, and
- calls back to our function for ordinary frames. */
- generic_pop_current_frame (mn10300_pop_frame_regular);
-
- /* Throw away any cached frame information. */
- flush_cached_frames ();
-}
-
-/* Function: push_arguments
- Setup arguments for a call to the target. Arguments go in
- order on the stack. */
-
-static CORE_ADDR
-mn10300_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
-{
- int argnum = 0;
- int len = 0;
- int stack_offset = 0;
- int regsused = struct_return ? 1 : 0;
-
- /* This should be a nop, but align the stack just in case something
- went wrong. Stacks are four byte aligned on the mn10300. */
- sp &= ~3;
-
- /* Now make space on the stack for the args.
-
- XXX This doesn't appear to handle pass-by-invisible reference
- arguments. */
- for (argnum = 0; argnum < nargs; argnum++)
- {
- int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3;
-
- while (regsused < 2 && arg_length > 0)
- {
- regsused++;
- arg_length -= 4;
- }
- len += arg_length;
- }
-
- /* Allocate stack space. */
- sp -= len;
-
- regsused = struct_return ? 1 : 0;
- /* Push all arguments onto the stack. */
- for (argnum = 0; argnum < nargs; argnum++)
- {
- int len;
- char *val;
-
- /* XXX Check this. What about UNIONS? */
- if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT
- && 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);
- }
- else
- {
- len = TYPE_LENGTH (VALUE_TYPE (*args));
- val = (char *) VALUE_CONTENTS (*args);
- }
-
- while (regsused < 2 && len > 0)
- {
- write_register (regsused, extract_unsigned_integer (val, 4));
- val += 4;
- len -= 4;
- regsused++;
- }
-
- while (len > 0)
- {
- write_memory (sp + stack_offset, val, 4);
- len -= 4;
- val += 4;
- stack_offset += 4;
- }
-
- args++;
- }
-
- /* Make space for the flushback area. */
- sp -= 8;
- return sp;
-}
-
-/* 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 */
-
-static CORE_ADDR
-mn10300_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
-{
- unsigned char buf[4];
-
- store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ());
- write_memory (sp - 4, buf, 4);
- return sp - 4;
-}
-
-/* Function: store_struct_return (addr,sp)
- Store the structure value return address for an inferior function
- call. */
-
-static void
-mn10300_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
-{
- /* The structure return address is passed as the first argument. */
- write_register (0, addr);
-}
-
-/* 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
- registers. If the inner frame is a dummy frame, return its PC
- instead of RP, because that's where "caller" of the dummy-frame
- will be found. */
-
-static CORE_ADDR
-mn10300_frame_saved_pc (struct frame_info *fi)
-{
- int adjust = saved_regs_size (fi);
-
- return (read_memory_integer (fi->frame + adjust, REGISTER_SIZE));
-}
-
-/* Function: mn10300_init_extra_frame_info
- Setup the frame's frame pointer, pc, and frame addresses for saved
- 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
- 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.
-
- We can be called with the PC in the call dummy under two circumstances.
- First, during normal backtracing, second, while figuring out the frame
- pointer just prior to calling the target function (see run_stack_dummy). */
-
-static void
-mn10300_init_extra_frame_info (int fromleaf, struct frame_info *fi)
-{
- if (fi->next)
- fi->pc = FRAME_SAVED_PC (fi->next);
-
- frame_saved_regs_zalloc (fi);
- fi->extra_info = (struct frame_extra_info *)
- frame_obstack_alloc (sizeof (struct frame_extra_info));
-
- fi->extra_info->status = 0;
- fi->extra_info->stack_size = 0;
-
- mn10300_analyze_prologue (fi, 0);
-}
-
-
-/* This function's job is handled by init_extra_frame_info. */
-static void
-mn10300_frame_init_saved_regs (struct frame_info *frame)
-{
-}
-
-
-/* Function: mn10300_virtual_frame_pointer
- Return the register that the function uses for a frame pointer,
- plus any necessary offset to be applied to the register before
- any frame pointer offsets. */
-
-static void
-mn10300_virtual_frame_pointer (CORE_ADDR pc,
- int *reg,
- LONGEST *offset)
-{
- struct frame_info *dummy = analyze_dummy_frame (pc, 0);
- /* Set up a dummy frame_info, Analyze the prolog and fill in the
- extra info. */
- /* Results will tell us which type of frame it uses. */
- if (dummy->extra_info->status & MY_FRAME_IN_SP)
- {
- *reg = SP_REGNUM;
- *offset = -(dummy->extra_info->stack_size);
- }
- else
- {
- *reg = A3_REGNUM;
- *offset = 0;
- }
-}
-
-static int
-mn10300_reg_struct_has_addr (int gcc_p, struct type *type)
-{
- return (TYPE_LENGTH (type) > 8);
-}
-
-static struct type *
-mn10300_register_virtual_type (int reg)
-{
- return builtin_type_int;
-}
-
-static int
-mn10300_register_byte (int reg)
-{
- return (reg * 4);
-}
-
-static int
-mn10300_register_virtual_size (int reg)
-{
- return 4;
-}
-
-static int
-mn10300_register_raw_size (int reg)
-{
- return 4;
-}
-
-/* If DWARF2 is a register number appearing in Dwarf2 debug info, then
- mn10300_dwarf2_reg_to_regnum (DWARF2) is the corresponding GDB
- register number. Why don't Dwarf2 and GDB use the same numbering?
- Who knows? But since people have object files lying around with
- the existing Dwarf2 numbering, and other people have written stubs
- to work with the existing GDB, neither of them can change. So we
- just have to cope. */
-static int
-mn10300_dwarf2_reg_to_regnum (int dwarf2)
-{
- /* This table is supposed to be shaped like the REGISTER_NAMES
- initializer in gcc/config/mn10300/mn10300.h. Registers which
- appear in GCC's numbering, but have no counterpart in GDB's
- world, are marked with a -1. */
- static int dwarf2_to_gdb[] = {
- 0, 1, 2, 3, 4, 5, 6, 7, -1, 8,
- 15, 16, 17, 18, 19, 20, 21, 22
- };
- int gdb;
-
- if (dwarf2 < 0
- || dwarf2 >= (sizeof (dwarf2_to_gdb) / sizeof (dwarf2_to_gdb[0]))
- || dwarf2_to_gdb[dwarf2] == -1)
- internal_error (__FILE__, __LINE__,
- "bogus register number in debug info: %d", dwarf2);
-
- return dwarf2_to_gdb[dwarf2];
-}
-
-static void
-mn10300_print_register (const char *name, int regnum, int reg_width)
-{
- char *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE);
-
- if (reg_width)
- printf_filtered ("%*s: ", reg_width, name);
- else
- printf_filtered ("%s: ", name);
-
- /* Get the data */
- if (!frame_register_read (selected_frame, regnum, raw_buffer))
- {
- printf_filtered ("[invalid]");
- return;
- }
- else
- {
- int byte;
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
- {
- for (byte = REGISTER_RAW_SIZE (regnum) - REGISTER_VIRTUAL_SIZE (regnum);
- byte < REGISTER_RAW_SIZE (regnum);
- byte++)
- printf_filtered ("%02x", (unsigned char) raw_buffer[byte]);
- }
- else
- {
- for (byte = REGISTER_VIRTUAL_SIZE (regnum) - 1;
- byte >= 0;
- byte--)
- printf_filtered ("%02x", (unsigned char) raw_buffer[byte]);
- }
- }
-}
-
-static void
-mn10300_do_registers_info (int regnum, int fpregs)
-{
- if (regnum >= 0)
- {
- const char *name = REGISTER_NAME (regnum);
- if (name == NULL || name[0] == '\0')
- error ("Not a valid register for the current processor type");
- mn10300_print_register (name, regnum, 0);
- printf_filtered ("\n");
- }
- else
- {
- /* print registers in an array 4x8 */
- int r;
- int reg;
- const int nr_in_row = 4;
- const int reg_width = 4;
- for (r = 0; r < NUM_REGS; r += nr_in_row)
- {
- int c;
- int printing = 0;
- int padding = 0;
- for (c = r; c < r + nr_in_row; c++)
- {
- const char *name = REGISTER_NAME (c);
- if (name != NULL && *name != '\0')
- {
- printing = 1;
- while (padding > 0)
- {
- printf_filtered (" ");
- padding--;
- }
- mn10300_print_register (name, c, reg_width);
- printf_filtered (" ");
- }
- else
- {
- padding += (reg_width + 2 + 8 + 1);
- }
- }
- if (printing)
- printf_filtered ("\n");
- }
- }
-}
-
-/* Dump out the mn10300 speciic architecture information. */
-
-static void
-mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n",
- tdep->am33_mode);
-}
-
-static struct gdbarch *
-mn10300_gdbarch_init (struct gdbarch_info info,
- struct gdbarch_list *arches)
-{
- static LONGEST mn10300_call_dummy_words[] = { 0 };
- struct gdbarch *gdbarch;
- struct gdbarch_tdep *tdep = NULL;
- int am33_mode;
- gdbarch_register_name_ftype *register_name;
- int mach;
- int num_regs;
-
- arches = gdbarch_list_lookup_by_info (arches, &info);
- if (arches != NULL)
- return arches->gdbarch;
- tdep = xmalloc (sizeof (struct gdbarch_tdep));
- gdbarch = gdbarch_alloc (&info, tdep);
-
- if (info.bfd_arch_info != NULL
- && info.bfd_arch_info->arch == bfd_arch_mn10300)
- mach = info.bfd_arch_info->mach;
- else
- mach = 0;
- switch (mach)
- {
- case 0:
- case bfd_mach_mn10300:
- am33_mode = 0;
- register_name = mn10300_generic_register_name;
- num_regs = 32;
- break;
- case bfd_mach_am33:
- am33_mode = 1;
- register_name = am33_register_name;
- num_regs = 32;
- break;
- default:
- internal_error (__FILE__, __LINE__,
- "mn10300_gdbarch_init: Unknown mn10300 variant");
- return NULL; /* keep GCC happy. */
- }
-
- /* Registers. */
- set_gdbarch_num_regs (gdbarch, num_regs);
- set_gdbarch_register_name (gdbarch, register_name);
- set_gdbarch_register_size (gdbarch, 4);
- set_gdbarch_register_bytes (gdbarch,
- num_regs * gdbarch_register_size (gdbarch));
- set_gdbarch_max_register_raw_size (gdbarch, 4);
- set_gdbarch_register_raw_size (gdbarch, mn10300_register_raw_size);
- set_gdbarch_register_byte (gdbarch, mn10300_register_byte);
- set_gdbarch_max_register_virtual_size (gdbarch, 4);
- 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_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_virtual_frame_pointer (gdbarch, mn10300_virtual_frame_pointer);
-
- /* Breakpoints. */
- set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc);
- set_gdbarch_function_start_offset (gdbarch, 0);
- set_gdbarch_decr_pc_after_break (gdbarch, 0);
-
- /* Stack unwinding. */
- set_gdbarch_get_saved_register (gdbarch, generic_unwind_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_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_deprecated_extract_return_value (gdbarch, mn10300_extract_return_value);
- set_gdbarch_deprecated_extract_struct_value_address
- (gdbarch, mn10300_extract_struct_value_address);
- 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);
-
- /* Calling functions in the inferior from GDB. */
- set_gdbarch_call_dummy_p (gdbarch, 1);
- 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,
- sizeof (mn10300_call_dummy_words));
- 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_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);
- set_gdbarch_push_return_address (gdbarch, mn10300_push_return_address);
- set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
- set_gdbarch_use_struct_convention (gdbarch, mn10300_use_struct_convention);
-
- tdep->am33_mode = am33_mode;
-
- return gdbarch;
-}
-
-void
-_initialize_mn10300_tdep (void)
-{
-/* printf("_initialize_mn10300_tdep\n"); */
-
- tm_print_insn = print_insn_mn10300;
-
- register_gdbarch_init (bfd_arch_mn10300, mn10300_gdbarch_init);
-}
+/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.\r
+\r
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free\r
+ Software Foundation, Inc.\r
+\r
+ This file is part of GDB.\r
+\r
+ This program is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ This program is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with this program; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place - Suite 330,\r
+ Boston, MA 02111-1307, USA. */\r
+\r
+/* MVS Notes:\r
+\r
+ To get from 1.1 to 1.2, add:\r
+ use_struct_convention\r
+ store_return_value\r
+ extract_return_value\r
+ extract_struct_value_address\r
+ \r
+ Make sure to use regcache. */\r
+\r
+/* MVS Notes:\r
+\r
+ Apparently cannot run without a stub placeholder for unwind_dummy_id. \r
+*/\r
+\r
+/* MVS Notes:\r
+\r
+ To get from 1.2 to 1.3, add:\r
+ read_pc, write_pc\r
+ frame_unwind_init\r
+ struct mn10300_unwind_cache\r
+ unwind_pc\r
+ unwind_dummy_id\r
+ frame_this_id\r
+ frame_prev_register\r
+ frame_sniffer (struct mn10300_frame_unwind)\r
+*/\r
+\r
+#include "defs.h"\r
+#include "arch-utils.h"\r
+#include "dis-asm.h"\r
+#include "gdbtypes.h"\r
+#include "regcache.h"\r
+#include "gdb_string.h"\r
+#include "gdb_assert.h"\r
+#include "frame.h"\r
+#include "frame-unwind.h"\r
+#include "frame-base.h"\r
+#include "trad-frame.h"\r
+#include "symtab.h"\r
+#include "dwarf2-frame.h"\r
+#include "regcache.h"\r
+\r
+#include "mn10300-tdep.h"\r
+\r
+\r
+/* Compute the alignment required by a type. */\r
+\r
+static int\r
+mn10300_type_align (struct type *type)\r
+{\r
+ int i, align = 1;\r
+\r
+ switch (TYPE_CODE (type))\r
+ {\r
+ case TYPE_CODE_INT:\r
+ case TYPE_CODE_ENUM:\r
+ case TYPE_CODE_SET:\r
+ case TYPE_CODE_RANGE:\r
+ case TYPE_CODE_CHAR:\r
+ case TYPE_CODE_BOOL:\r
+ case TYPE_CODE_FLT:\r
+ case TYPE_CODE_PTR:\r
+ case TYPE_CODE_REF:\r
+ return TYPE_LENGTH (type);\r
+\r
+ case TYPE_CODE_COMPLEX:\r
+ return TYPE_LENGTH (type) / 2;\r
+\r
+ case TYPE_CODE_STRUCT:\r
+ case TYPE_CODE_UNION:\r
+ for (i = 0; i < TYPE_NFIELDS (type); i++)\r
+ {\r
+ int falign = mn10300_type_align (TYPE_FIELD_TYPE (type, i));\r
+ while (align < falign)\r
+ align <<= 1;\r
+ }\r
+ return align;\r
+\r
+ case TYPE_CODE_ARRAY:\r
+ /* HACK! Structures containing arrays, even small ones, are not\r
+ elligible for returning in registers. */\r
+ return 256;\r
+\r
+ case TYPE_CODE_TYPEDEF:\r
+ return mn10300_type_align (check_typedef (type));\r
+\r
+ default:\r
+ internal_error (__FILE__, __LINE__, _("bad switch"));\r
+ }\r
+}\r
+\r
+/* MVS note this is deprecated. */\r
+/* Should call_function allocate stack space for a struct return? */\r
+/* gcc_p unused */\r
+static int\r
+mn10300_use_struct_convention (int gcc_p, struct type *type)\r
+{\r
+ /* Structures bigger than a pair of words can't be returned in\r
+ registers. */\r
+ if (TYPE_LENGTH (type) > 8)\r
+ return 1;\r
+\r
+ switch (TYPE_CODE (type))\r
+ {\r
+ case TYPE_CODE_STRUCT:\r
+ case TYPE_CODE_UNION:\r
+ /* Structures with a single field are handled as the field\r
+ itself. */\r
+ if (TYPE_NFIELDS (type) == 1)\r
+ return mn10300_use_struct_convention (gcc_p, \r
+ TYPE_FIELD_TYPE (type, 0));\r
+\r
+ /* Structures with word or double-word size are passed in memory, as\r
+ long as they require at least word alignment. */\r
+ if (mn10300_type_align (type) >= 4)\r
+ return 0;\r
+\r
+ return 1;\r
+\r
+ /* Arrays are addressable, so they're never returned in\r
+ registers. This condition can only hold when the array is\r
+ the only field of a struct or union. */\r
+ case TYPE_CODE_ARRAY:\r
+ return 1;\r
+\r
+ case TYPE_CODE_TYPEDEF:\r
+ return mn10300_use_struct_convention (gcc_p, check_typedef (type));\r
+\r
+ default:\r
+ return 0;\r
+ }\r
+}\r
+\r
+/* MVS note this is deprecated. */\r
+static void\r
+mn10300_store_return_value (struct type *type,\r
+ struct regcache *regcache, const void *valbuf)\r
+{\r
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);\r
+ int len = TYPE_LENGTH (type);\r
+ int reg, regsz;\r
+ \r
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)\r
+ reg = 4;\r
+ else\r
+ reg = 0;\r
+\r
+ regsz = register_size (gdbarch, reg);\r
+\r
+ if (len <= regsz)\r
+ regcache_raw_write_part (regcache, reg, 0, len, valbuf);\r
+ else if (len <= 2 * regsz)\r
+ {\r
+ regcache_raw_write (regcache, reg, valbuf);\r
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));\r
+ regcache_raw_write_part (regcache, reg+1, 0,\r
+ len - regsz, (char *) valbuf + regsz);\r
+ }\r
+ else\r
+ internal_error (__FILE__, __LINE__,\r
+ _("Cannot store return value %d bytes long."), len);\r
+}\r
+\r
+/* MVS note deprecated. */\r
+static void\r
+mn10300_extract_return_value (struct type *type,\r
+ struct regcache *regcache, void *valbuf)\r
+{\r
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);\r
+ char buf[MAX_REGISTER_SIZE];\r
+ int len = TYPE_LENGTH (type);\r
+ int reg, regsz;\r
+\r
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)\r
+ reg = 4;\r
+ else\r
+ reg = 0;\r
+\r
+ regsz = register_size (gdbarch, reg);\r
+ if (len <= regsz)\r
+ {\r
+ regcache_raw_read (regcache, reg, buf);\r
+ memcpy (valbuf, buf, len);\r
+ }\r
+ else if (len <= 2 * regsz)\r
+ {\r
+ regcache_raw_read (regcache, reg, buf);\r
+ memcpy (valbuf, buf, regsz);\r
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));\r
+ regcache_raw_read (regcache, reg + 1, buf);\r
+ memcpy ((char *) valbuf + regsz, buf, len - regsz);\r
+ }\r
+ else\r
+ internal_error (__FILE__, __LINE__,\r
+ _("Cannot extract return value %d bytes long."), len);\r
+}\r
+\r
+static char *\r
+register_name (int reg, char **regs, long sizeof_regs)\r
+{\r
+ if (reg < 0 || reg >= sizeof_regs / sizeof (regs[0]))\r
+ return NULL;\r
+ else\r
+ return regs[reg];\r
+}\r
+\r
+static const char *\r
+mn10300_generic_register_name (int reg)\r
+{\r
+ static char *regs[] =\r
+ { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",\r
+ "sp", "pc", "mdr", "psw", "lir", "lar", "", "",\r
+ "", "", "", "", "", "", "", "",\r
+ "", "", "", "", "", "", "", "fp"\r
+ };\r
+ return register_name (reg, regs, sizeof regs);\r
+}\r
+\r
+\r
+static const char *\r
+am33_register_name (int reg)\r
+{\r
+ static char *regs[] =\r
+ { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",\r
+ "sp", "pc", "mdr", "psw", "lir", "lar", "",\r
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",\r
+ "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""\r
+ };\r
+ return register_name (reg, regs, sizeof regs);\r
+}\r
+\r
+\r
+static struct type *\r
+mn10300_register_type (struct gdbarch *gdbarch, int reg)\r
+{\r
+ return builtin_type_int;\r
+}\r
+\r
+static CORE_ADDR\r
+mn10300_read_pc (ptid_t ptid)\r
+{\r
+ return read_register_pid (E_PC_REGNUM, ptid);\r
+}\r
+\r
+static void\r
+mn10300_write_pc (CORE_ADDR val, ptid_t ptid)\r
+{\r
+ return write_register_pid (E_PC_REGNUM, val, ptid);\r
+}\r
+\r
+/* The breakpoint instruction must be the same size as the smallest\r
+ instruction in the instruction set.\r
+\r
+ The Matsushita mn10x00 processors have single byte instructions\r
+ so we need a single byte breakpoint. Matsushita hasn't defined\r
+ one, so we defined it ourselves. */\r
+\r
+const static unsigned char *\r
+mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)\r
+{\r
+ static char breakpoint[] = {0xff};\r
+ *bp_size = 1;\r
+ return breakpoint;\r
+}\r
+\r
+/* Function: skip_prologue\r
+ Return the address of the first inst past the prologue of the function. */\r
+\r
+static CORE_ADDR\r
+mn10300_skip_prologue (CORE_ADDR pc)\r
+{\r
+ /* FIXME: not implemented. */\r
+ /* First approximation, try simply using skip_prologue_using_sal. */\r
+ return skip_prologue_using_sal (pc);\r
+}\r
+\r
+/* Simple frame_unwind_cache. \r
+ This finds the "extra info" for the frame. */\r
+struct trad_frame_cache *\r
+mn10300_frame_unwind_cache (struct frame_info *next_frame,\r
+ void **this_prologue_cache)\r
+{\r
+ struct trad_frame_cache *cache;\r
+ CORE_ADDR pc;\r
+\r
+ if (*this_prologue_cache)\r
+ return (*this_prologue_cache);\r
+\r
+ cache = trad_frame_cache_zalloc (next_frame);\r
+ pc = gdbarch_unwind_pc (current_gdbarch, next_frame);\r
+ mn10300_analyze_prologue (next_frame, &cache, pc);\r
+\r
+ trad_frame_set_id (cache, \r
+ frame_id_build (trad_frame_get_this_base (cache), pc));\r
+\r
+ (*this_prologue_cache) = cache;\r
+ return cache;\r
+}\r
+\r
+/* Here is a dummy implementation. */\r
+static struct frame_id\r
+mn10300_dummy_unwind_dummy_id (struct gdbarch *gdbarch,\r
+ struct frame_info *next_frame)\r
+{\r
+ return frame_id_build (0, 0);\r
+}\r
+\r
+/* Trad frame implementation. */\r
+static void\r
+mn10300_frame_this_id (struct frame_info *next_frame,\r
+ void **this_prologue_cache,\r
+ struct frame_id *this_id)\r
+{\r
+ struct trad_frame_cache *cache = \r
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);\r
+\r
+ trad_frame_get_id (cache, this_id);\r
+}\r
+\r
+static void\r
+mn10300_frame_prev_register (struct frame_info *next_frame,\r
+ void **this_prologue_cache,\r
+ int regnum, int *optimizedp,\r
+ enum lval_type *lvalp, CORE_ADDR *addrp,\r
+ int *realnump, void *bufferp)\r
+{\r
+ struct trad_frame_cache *cache =\r
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);\r
+\r
+ trad_frame_get_register (cache, next_frame, regnum, optimizedp, \r
+ lvalp, addrp, realnump, bufferp);\r
+ /* Or...\r
+ trad_frame_get_prev_register (next_frame, cache->prev_regs, regnum, \r
+ optimizedp, lvalp, addrp, realnump, bufferp);\r
+ */\r
+}\r
+\r
+static const struct frame_unwind mn10300_frame_unwind = {\r
+ NORMAL_FRAME,\r
+ mn10300_frame_this_id, \r
+ mn10300_frame_prev_register\r
+};\r
+\r
+static CORE_ADDR\r
+mn10300_frame_base_address (struct frame_info *next_frame,\r
+ void **this_prologue_cache)\r
+{\r
+ struct trad_frame_cache *cache = \r
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);\r
+\r
+ return trad_frame_get_this_base (cache);\r
+}\r
+\r
+static const struct frame_unwind *\r
+mn10300_frame_sniffer (struct frame_info *next_frame)\r
+{\r
+ return &mn10300_frame_unwind;\r
+}\r
+\r
+static const struct frame_base mn10300_frame_base = {\r
+ &mn10300_frame_unwind, \r
+ mn10300_frame_base_address, \r
+ mn10300_frame_base_address,\r
+ mn10300_frame_base_address\r
+};\r
+\r
+static CORE_ADDR\r
+mn10300_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)\r
+{\r
+ ULONGEST pc;\r
+\r
+ frame_unwind_unsigned_register (next_frame, E_PC_REGNUM, &pc);\r
+ return pc;\r
+}\r
+\r
+static CORE_ADDR\r
+mn10300_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)\r
+{\r
+ ULONGEST sp;\r
+\r
+ frame_unwind_unsigned_register (next_frame, E_SP_REGNUM, &sp);\r
+ return sp;\r
+}\r
+\r
+static void\r
+mn10300_frame_unwind_init (struct gdbarch *gdbarch)\r
+{\r
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);\r
+ frame_unwind_append_sniffer (gdbarch, mn10300_frame_sniffer);\r
+ frame_base_set_default (gdbarch, &mn10300_frame_base);\r
+ set_gdbarch_unwind_dummy_id (gdbarch, mn10300_dummy_unwind_dummy_id);\r
+ set_gdbarch_unwind_pc (gdbarch, mn10300_unwind_pc);\r
+ set_gdbarch_unwind_sp (gdbarch, mn10300_unwind_sp);\r
+}\r
+\r
+/* Dump out the mn10300 specific architecture information. */\r
+\r
+static void\r
+mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)\r
+{\r
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);\r
+ fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n",\r
+ tdep->am33_mode);\r
+}\r
+\r
+static struct gdbarch *\r
+mn10300_gdbarch_init (struct gdbarch_info info,\r
+ struct gdbarch_list *arches)\r
+{\r
+ struct gdbarch *gdbarch;\r
+ struct gdbarch_tdep *tdep;\r
+\r
+ arches = gdbarch_list_lookup_by_info (arches, &info);\r
+ if (arches != NULL)\r
+ return arches->gdbarch;\r
+\r
+ tdep = xmalloc (sizeof (struct gdbarch_tdep));\r
+ gdbarch = gdbarch_alloc (&info, tdep);\r
+\r
+ switch (info.bfd_arch_info->mach)\r
+ {\r
+ case 0:\r
+ case bfd_mach_mn10300:\r
+ set_gdbarch_register_name (gdbarch, mn10300_generic_register_name);\r
+ tdep->am33_mode = 0;\r
+ break;\r
+ case bfd_mach_am33:\r
+ set_gdbarch_register_name (gdbarch, am33_register_name);\r
+ tdep->am33_mode = 1;\r
+ break;\r
+ default:\r
+ internal_error (__FILE__, __LINE__,\r
+ _("mn10300_gdbarch_init: Unknown mn10300 variant"));\r
+ break;\r
+ }\r
+\r
+ /* Registers. */\r
+ set_gdbarch_num_regs (gdbarch, E_NUM_REGS);\r
+ set_gdbarch_register_type (gdbarch, mn10300_register_type);\r
+ set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue);\r
+ set_gdbarch_read_pc (gdbarch, mn10300_read_pc);\r
+ set_gdbarch_write_pc (gdbarch, mn10300_write_pc);\r
+ set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);\r
+ set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);\r
+\r
+ /* Stack unwinding. */\r
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);\r
+ /* Breakpoints. */\r
+ set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc);\r
+ /* decr_pc_after_break? */\r
+ /* Disassembly. */\r
+ set_gdbarch_print_insn (gdbarch, print_insn_mn10300);\r
+\r
+ /* Stage 2 */\r
+ /* MVS Note: at least the first one is deprecated! */\r
+ set_gdbarch_deprecated_use_struct_convention (gdbarch, \r
+ mn10300_use_struct_convention);\r
+ set_gdbarch_store_return_value (gdbarch, mn10300_store_return_value);\r
+ set_gdbarch_extract_return_value (gdbarch, mn10300_extract_return_value);\r
+\r
+ mn10300_frame_unwind_init (gdbarch);\r
+\r
+ return gdbarch;\r
+}\r
+ \r
+void\r
+_initialize_mn10300_tdep (void)\r
+{\r
+ gdbarch_register (bfd_arch_mn10300, mn10300_gdbarch_init, mn10300_dump_tdep);\r
+}\r
+\r
projects / binutils.git / blobdiff