/* Target-dependent code for Atmel AVR, for GDB.
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/* Target-dependent code for Atmel AVR, for GDB.
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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/* Contributed by Theodore A. Roth, troth@verinet.com */
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/* Contributed by Theodore A. Roth, troth@verinet.com */
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/* Portions of this file were taken from the original gdb-4.18 patch developed
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/* Portions of this file were taken from the original gdb-4.18 patch developed
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by Denis Chertykov, denisc@overta.ru */
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by Denis Chertykov, denisc@overta.ru */
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#include "defs.h"
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#include "defs.h"
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#include "gdbcmd.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "symfile.h"
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#include "symfile.h"
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#include "arch-utils.h"
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#include "arch-utils.h"
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#include "regcache.h"
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#include "regcache.h"
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#include "gdb_string.h"
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#include "gdb_string.h"
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/* AVR Background:
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/* AVR Background:
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(AVR micros are pure Harvard Architecture processors.)
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(AVR micros are pure Harvard Architecture processors.)
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The AVR family of microcontrollers have three distinctly different memory
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The AVR family of microcontrollers have three distinctly different memory
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spaces: flash, sram and eeprom. The flash is 16 bits wide and is used for
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spaces: flash, sram and eeprom. The flash is 16 bits wide and is used for
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the most part to store program instructions. The sram is 8 bits wide and is
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the most part to store program instructions. The sram is 8 bits wide and is
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used for the stack and the heap. Some devices lack sram and some can have
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used for the stack and the heap. Some devices lack sram and some can have
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an additional external sram added on as a peripheral.
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an additional external sram added on as a peripheral.
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The eeprom is 8 bits wide and is used to store data when the device is
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The eeprom is 8 bits wide and is used to store data when the device is
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powered down. Eeprom is not directly accessible, it can only be accessed
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powered down. Eeprom is not directly accessible, it can only be accessed
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via io-registers using a special algorithm. Accessing eeprom via gdb's
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via io-registers using a special algorithm. Accessing eeprom via gdb's
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remote serial protocol ('m' or 'M' packets) looks difficult to do and is
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remote serial protocol ('m' or 'M' packets) looks difficult to do and is
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not included at this time.
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not included at this time.
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[The eeprom could be read manually via ``x/b <eaddr + AVR_EMEM_START>'' or
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[The eeprom could be read manually via ``x/b <eaddr + AVR_EMEM_START>'' or
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written using ``set {unsigned char}<eaddr + AVR_EMEM_START>''. For this to
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written using ``set {unsigned char}<eaddr + AVR_EMEM_START>''. For this to
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work, the remote target must be able to handle eeprom accesses and perform
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work, the remote target must be able to handle eeprom accesses and perform
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the address translation.]
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the address translation.]
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All three memory spaces have physical addresses beginning at 0x0. In
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All three memory spaces have physical addresses beginning at 0x0. In
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addition, the flash is addressed by gcc/binutils/gdb with respect to 8 bit
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addition, the flash is addressed by gcc/binutils/gdb with respect to 8 bit
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bytes instead of the 16 bit wide words used by the real device for the
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bytes instead of the 16 bit wide words used by the real device for the
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Program Counter.
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Program Counter.
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In order for remote targets to work correctly, extra bits must be added to
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In order for remote targets to work correctly, extra bits must be added to
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addresses before they are send to the target or received from the target
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addresses before they are send to the target or received from the target
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via the remote serial protocol. The extra bits are the MSBs and are used to
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via the remote serial protocol. The extra bits are the MSBs and are used to
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decode which memory space the address is referring to. */
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decode which memory space the address is referring to. */
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#undef XMALLOC
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#undef XMALLOC
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#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
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#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
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#undef EXTRACT_INSN
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#undef EXTRACT_INSN
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#define EXTRACT_INSN(addr) extract_unsigned_integer(addr,2)
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#define EXTRACT_INSN(addr) extract_unsigned_integer(addr,2)
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/* Constants: prefixed with AVR_ to avoid name space clashes */
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/* Constants: prefixed with AVR_ to avoid name space clashes */
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enum
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enum
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{
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{
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AVR_REG_W = 24,
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AVR_REG_W = 24,
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AVR_REG_X = 26,
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AVR_REG_X = 26,
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AVR_REG_Y = 28,
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AVR_REG_Y = 28,
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AVR_FP_REGNUM = 28,
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AVR_FP_REGNUM = 28,
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AVR_REG_Z = 30,
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AVR_REG_Z = 30,
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AVR_SREG_REGNUM = 32,
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AVR_SREG_REGNUM = 32,
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AVR_SP_REGNUM = 33,
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AVR_SP_REGNUM = 33,
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AVR_PC_REGNUM = 34,
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AVR_PC_REGNUM = 34,
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AVR_NUM_REGS = 32 + 1 /*SREG*/ + 1 /*SP*/ + 1 /*PC*/,
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AVR_NUM_REGS = 32 + 1 /*SREG*/ + 1 /*SP*/ + 1 /*PC*/,
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AVR_NUM_REG_BYTES = 32 + 1 /*SREG*/ + 2 /*SP*/ + 4 /*PC*/,
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AVR_NUM_REG_BYTES = 32 + 1 /*SREG*/ + 2 /*SP*/ + 4 /*PC*/,
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AVR_PC_REG_INDEX = 35, /* index into array of registers */
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AVR_PC_REG_INDEX = 35, /* index into array of registers */
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AVR_MAX_PROLOGUE_SIZE = 56, /* bytes */
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AVR_MAX_PROLOGUE_SIZE = 56, /* bytes */
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/* Count of pushed registers. From r2 to r17 (inclusively), r28, r29 */
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/* Count of pushed registers. From r2 to r17 (inclusively), r28, r29 */
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AVR_MAX_PUSHES = 18,
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AVR_MAX_PUSHES = 18,
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/* Number of the last pushed register. r17 for current avr-gcc */
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/* Number of the last pushed register. r17 for current avr-gcc */
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AVR_LAST_PUSHED_REGNUM = 17,
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AVR_LAST_PUSHED_REGNUM = 17,
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/* FIXME: TRoth/2002-01-??: Can we shift all these memory masks left 8
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/* FIXME: TRoth/2002-01-??: Can we shift all these memory masks left 8
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bits? Do these have to match the bfd vma values?. It sure would make
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bits? Do these have to match the bfd vma values?. It sure would make
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things easier in the future if they didn't need to match.
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things easier in the future if they didn't need to match.
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Note: I chose these values so as to be consistent with bfd vma
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Note: I chose these values so as to be consistent with bfd vma
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addresses.
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addresses.
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TRoth/2002-04-08: There is already a conflict with very large programs
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TRoth/2002-04-08: There is already a conflict with very large programs
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in the mega128. The mega128 has 128K instruction bytes (64K words),
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in the mega128. The mega128 has 128K instruction bytes (64K words),
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thus the Most Significant Bit is 0x10000 which gets masked off my
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thus the Most Significant Bit is 0x10000 which gets masked off my
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AVR_MEM_MASK.
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AVR_MEM_MASK.
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The problem manifests itself when trying to set a breakpoint in a
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The problem manifests itself when trying to set a breakpoint in a
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function which resides in the upper half of the instruction space and
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function which resides in the upper half of the instruction space and
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thus requires a 17-bit address.
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thus requires a 17-bit address.
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For now, I've just removed the EEPROM mask and changed AVR_MEM_MASK
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For now, I've just removed the EEPROM mask and changed AVR_MEM_MASK
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from 0x00ff0000 to 0x00f00000. Eeprom is not accessible from gdb yet,
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from 0x00ff0000 to 0x00f00000. Eeprom is not accessible from gdb yet,
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but could be for some remote targets by just adding the correct offset
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but could be for some remote targets by just adding the correct offset
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to the address and letting the remote target handle the low-level
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to the address and letting the remote target handle the low-level
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details of actually accessing the eeprom. */
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details of actually accessing the eeprom. */
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AVR_IMEM_START = 0x00000000, /* INSN memory */
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AVR_IMEM_START = 0x00000000, /* INSN memory */
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AVR_SMEM_START = 0x00800000, /* SRAM memory */
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AVR_SMEM_START = 0x00800000, /* SRAM memory */
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#if 1
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#if 1
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/* No eeprom mask defined */
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/* No eeprom mask defined */
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AVR_MEM_MASK = 0x00f00000, /* mask to determine memory space */
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AVR_MEM_MASK = 0x00f00000, /* mask to determine memory space */
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#else
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#else
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AVR_EMEM_START = 0x00810000, /* EEPROM memory */
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AVR_EMEM_START = 0x00810000, /* EEPROM memory */
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AVR_MEM_MASK = 0x00ff0000, /* mask to determine memory space */
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AVR_MEM_MASK = 0x00ff0000, /* mask to determine memory space */
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#endif
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#endif
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};
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};
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/* Any function with a frame looks like this
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/* Any function with a frame looks like this
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....... <-SP POINTS HERE
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....... <-SP POINTS HERE
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LOCALS1 <-FP POINTS HERE
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LOCALS1 <-FP POINTS HERE
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LOCALS0
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LOCALS0
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SAVED FP
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SAVED FP
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SAVED R3
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SAVED R3
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SAVED R2
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SAVED R2
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RET PC
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RET PC
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FIRST ARG
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FIRST ARG
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SECOND ARG */
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SECOND ARG */
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struct frame_extra_info
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struct frame_extra_info
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{
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{
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CORE_ADDR return_pc;
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CORE_ADDR return_pc;
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CORE_ADDR args_pointer;
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CORE_ADDR args_pointer;
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int locals_size;
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int locals_size;
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int framereg;
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int framereg;
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int framesize;
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int framesize;
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int is_main;
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int is_main;
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};
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};
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struct gdbarch_tdep
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struct gdbarch_tdep
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{
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{
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/* FIXME: TRoth: is there anything to put here? */
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/* FIXME: TRoth: is there anything to put here? */
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int foo;
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int foo;
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};
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};
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/* Lookup the name of a register given it's number. */
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/* Lookup the name of a register given it's number. */
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static const char *
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static const char *
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avr_register_name (int regnum)
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avr_register_name (int regnum)
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{
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{
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static char *register_names[] = {
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static char *register_names[] = {
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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"SREG", "SP", "PC"
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"SREG", "SP", "PC"
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};
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};
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if (regnum < 0)
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if (regnum < 0)
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return NULL;
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return NULL;
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if (regnum >= (sizeof (register_names) / sizeof (*register_names)))
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if (regnum >= (sizeof (register_names) / sizeof (*register_names)))
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return NULL;
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return NULL;
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return register_names[regnum];
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return register_names[regnum];
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}
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}
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/* Index within `registers' of the first byte of the space for
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/* Index within `registers' of the first byte of the space for
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register REGNUM. */
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register REGNUM. */
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static int
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static int
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avr_register_byte (int regnum)
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avr_register_byte (int regnum)
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{
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{
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if (regnum < AVR_PC_REGNUM)
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if (regnum < AVR_PC_REGNUM)
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return regnum;
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return regnum;
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else
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else
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return AVR_PC_REG_INDEX;
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return AVR_PC_REG_INDEX;
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}
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}
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/* Number of bytes of storage in the actual machine representation for
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/* Number of bytes of storage in the actual machine representation for
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register REGNUM. */
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register REGNUM. */
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static int
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static int
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avr_register_raw_size (int regnum)
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avr_register_raw_size (int regnum)
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{
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{
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switch (regnum)
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switch (regnum)
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{
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{
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case AVR_PC_REGNUM:
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case AVR_PC_REGNUM:
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return 4;
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return 4;
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case AVR_SP_REGNUM:
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case AVR_SP_REGNUM:
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case AVR_FP_REGNUM:
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case AVR_FP_REGNUM:
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return 2;
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return 2;
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default:
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default:
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return 1;
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return 1;
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}
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}
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}
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}
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/* Number of bytes of storage in the program's representation
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/* Number of bytes of storage in the program's representation
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for register N. */
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for register N. */
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static int
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static int
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avr_register_virtual_size (int regnum)
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avr_register_virtual_size (int regnum)
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{
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{
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return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum));
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return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum));
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}
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}
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/* Return the GDB type object for the "standard" data type
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/* Return the GDB type object for the "standard" data type
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of data in register N. */
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of data in register N. */
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static struct type *
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static struct type *
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avr_register_virtual_type (int regnum)
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avr_register_virtual_type (int regnum)
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{
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{
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switch (regnum)
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switch (regnum)
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{
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{
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case AVR_PC_REGNUM:
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case AVR_PC_REGNUM:
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return builtin_type_unsigned_long;
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return builtin_type_unsigned_long;
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case AVR_SP_REGNUM:
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case AVR_SP_REGNUM:
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return builtin_type_unsigned_short;
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return builtin_type_unsigned_short;
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default:
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default:
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return builtin_type_unsigned_char;
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return builtin_type_unsigned_char;
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}
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}
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}
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}
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/* Instruction address checks and convertions. */
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/* Instruction address checks and convertions. */
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static CORE_ADDR
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static CORE_ADDR
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avr_make_iaddr (CORE_ADDR x)
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avr_make_iaddr (CORE_ADDR x)
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{
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{
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return ((x) | AVR_IMEM_START);
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return ((x) | AVR_IMEM_START);
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}
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}
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static int
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static int
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avr_iaddr_p (CORE_ADDR x)
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avr_iaddr_p (CORE_ADDR x)
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{
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{
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return (((x) & AVR_MEM_MASK) == AVR_IMEM_START);
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return (((x) & AVR_MEM_MASK) == AVR_IMEM_START);
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}
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}
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/* FIXME: TRoth: Really need to use a larger mask for instructions. Some
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/* FIXME: TRoth: Really need to use a larger mask for instructions. Some
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devices are already up to 128KBytes of flash space.
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devices are already up to 128KBytes of flash space.
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TRoth/2002-04-8: See comment above where AVR_IMEM_START is defined. */
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TRoth/2002-04-8: See comment above where AVR_IMEM_START is defined. */
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static CORE_ADDR
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static CORE_ADDR
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avr_convert_iaddr_to_raw (CORE_ADDR x)
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avr_convert_iaddr_to_raw (CORE_ADDR x)
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{
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{
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return ((x) & 0xffffffff);
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return ((x) & 0xffffffff);
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}
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}
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|
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/* SRAM address checks and convertions. */
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/* SRAM address checks and convertions. */
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static CORE_ADDR
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static CORE_ADDR
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avr_make_saddr (CORE_ADDR x)
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avr_make_saddr (CORE_ADDR x)
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{
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{
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return ((x) | AVR_SMEM_START);
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return ((x) | AVR_SMEM_START);
|
}
|
}
|
|
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static int
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static int
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avr_saddr_p (CORE_ADDR x)
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avr_saddr_p (CORE_ADDR x)
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{
|
{
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return (((x) & AVR_MEM_MASK) == AVR_SMEM_START);
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return (((x) & AVR_MEM_MASK) == AVR_SMEM_START);
|
}
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}
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|
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static CORE_ADDR
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static CORE_ADDR
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avr_convert_saddr_to_raw (CORE_ADDR x)
|
avr_convert_saddr_to_raw (CORE_ADDR x)
|
{
|
{
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return ((x) & 0xffffffff);
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return ((x) & 0xffffffff);
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}
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}
|
|
|
/* EEPROM address checks and convertions. I don't know if these will ever
|
/* EEPROM address checks and convertions. I don't know if these will ever
|
actually be used, but I've added them just the same. TRoth */
|
actually be used, but I've added them just the same. TRoth */
|
|
|
/* TRoth/2002-04-08: Commented out for now to allow fix for problem with large
|
/* TRoth/2002-04-08: Commented out for now to allow fix for problem with large
|
programs in the mega128. */
|
programs in the mega128. */
|
|
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/* static CORE_ADDR */
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/* static CORE_ADDR */
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/* avr_make_eaddr (CORE_ADDR x) */
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/* avr_make_eaddr (CORE_ADDR x) */
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/* { */
|
/* { */
|
/* return ((x) | AVR_EMEM_START); */
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/* return ((x) | AVR_EMEM_START); */
|
/* } */
|
/* } */
|
|
|
/* static int */
|
/* static int */
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/* avr_eaddr_p (CORE_ADDR x) */
|
/* avr_eaddr_p (CORE_ADDR x) */
|
/* { */
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/* { */
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/* return (((x) & AVR_MEM_MASK) == AVR_EMEM_START); */
|
/* return (((x) & AVR_MEM_MASK) == AVR_EMEM_START); */
|
/* } */
|
/* } */
|
|
|
/* static CORE_ADDR */
|
/* static CORE_ADDR */
|
/* avr_convert_eaddr_to_raw (CORE_ADDR x) */
|
/* avr_convert_eaddr_to_raw (CORE_ADDR x) */
|
/* { */
|
/* { */
|
/* return ((x) & 0xffffffff); */
|
/* return ((x) & 0xffffffff); */
|
/* } */
|
/* } */
|
|
|
/* Convert from address to pointer and vice-versa. */
|
/* Convert from address to pointer and vice-versa. */
|
|
|
static void
|
static void
|
avr_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr)
|
avr_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr)
|
{
|
{
|
/* Is it a code address? */
|
/* Is it a code address? */
|
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
|
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
|
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
|
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
|
{
|
{
|
store_unsigned_integer (buf, TYPE_LENGTH (type),
|
store_unsigned_integer (buf, TYPE_LENGTH (type),
|
avr_convert_iaddr_to_raw (addr));
|
avr_convert_iaddr_to_raw (addr));
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Strip off any upper segment bits. */
|
/* Strip off any upper segment bits. */
|
store_unsigned_integer (buf, TYPE_LENGTH (type),
|
store_unsigned_integer (buf, TYPE_LENGTH (type),
|
avr_convert_saddr_to_raw (addr));
|
avr_convert_saddr_to_raw (addr));
|
}
|
}
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_pointer_to_address (struct type *type, void *buf)
|
avr_pointer_to_address (struct type *type, void *buf)
|
{
|
{
|
CORE_ADDR addr = extract_address (buf, TYPE_LENGTH (type));
|
CORE_ADDR addr = extract_address (buf, TYPE_LENGTH (type));
|
|
|
if (TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
|
if (TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
|
{
|
{
|
fprintf_unfiltered (gdb_stderr, "CODE_SPACE ---->> ptr->addr: 0x%lx\n",
|
fprintf_unfiltered (gdb_stderr, "CODE_SPACE ---->> ptr->addr: 0x%lx\n",
|
addr);
|
addr);
|
fprintf_unfiltered (gdb_stderr,
|
fprintf_unfiltered (gdb_stderr,
|
"+++ If you see this, please send me an email <troth@verinet.com>\n");
|
"+++ If you see this, please send me an email <troth@verinet.com>\n");
|
}
|
}
|
|
|
/* Is it a code address? */
|
/* Is it a code address? */
|
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
|
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
|
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD
|
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD
|
|| TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
|
|| TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
|
return avr_make_iaddr (addr);
|
return avr_make_iaddr (addr);
|
else
|
else
|
return avr_make_saddr (addr);
|
return avr_make_saddr (addr);
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_read_pc (ptid_t ptid)
|
avr_read_pc (ptid_t ptid)
|
{
|
{
|
ptid_t save_ptid;
|
ptid_t save_ptid;
|
CORE_ADDR pc;
|
CORE_ADDR pc;
|
CORE_ADDR retval;
|
CORE_ADDR retval;
|
|
|
save_ptid = inferior_ptid;
|
save_ptid = inferior_ptid;
|
inferior_ptid = ptid;
|
inferior_ptid = ptid;
|
pc = (int) read_register (AVR_PC_REGNUM);
|
pc = (int) read_register (AVR_PC_REGNUM);
|
inferior_ptid = save_ptid;
|
inferior_ptid = save_ptid;
|
retval = avr_make_iaddr (pc);
|
retval = avr_make_iaddr (pc);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
static void
|
static void
|
avr_write_pc (CORE_ADDR val, ptid_t ptid)
|
avr_write_pc (CORE_ADDR val, ptid_t ptid)
|
{
|
{
|
ptid_t save_ptid;
|
ptid_t save_ptid;
|
|
|
save_ptid = inferior_ptid;
|
save_ptid = inferior_ptid;
|
inferior_ptid = ptid;
|
inferior_ptid = ptid;
|
write_register (AVR_PC_REGNUM, avr_convert_iaddr_to_raw (val));
|
write_register (AVR_PC_REGNUM, avr_convert_iaddr_to_raw (val));
|
inferior_ptid = save_ptid;
|
inferior_ptid = save_ptid;
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_read_sp (void)
|
avr_read_sp (void)
|
{
|
{
|
return (avr_make_saddr (read_register (AVR_SP_REGNUM)));
|
return (avr_make_saddr (read_register (AVR_SP_REGNUM)));
|
}
|
}
|
|
|
static void
|
static void
|
avr_write_sp (CORE_ADDR val)
|
avr_write_sp (CORE_ADDR val)
|
{
|
{
|
write_register (AVR_SP_REGNUM, avr_convert_saddr_to_raw (val));
|
write_register (AVR_SP_REGNUM, avr_convert_saddr_to_raw (val));
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_read_fp (void)
|
avr_read_fp (void)
|
{
|
{
|
return (avr_make_saddr (read_register (AVR_FP_REGNUM)));
|
return (avr_make_saddr (read_register (AVR_FP_REGNUM)));
|
}
|
}
|
|
|
/* Translate a GDB virtual ADDR/LEN into a format the remote target
|
/* Translate a GDB virtual ADDR/LEN into a format the remote target
|
understands. Returns number of bytes that can be transfered
|
understands. Returns number of bytes that can be transfered
|
starting at TARG_ADDR. Return ZERO if no bytes can be transfered
|
starting at TARG_ADDR. Return ZERO if no bytes can be transfered
|
(segmentation fault).
|
(segmentation fault).
|
|
|
TRoth/2002-04-08: Could this be used to check for dereferencing an invalid
|
TRoth/2002-04-08: Could this be used to check for dereferencing an invalid
|
pointer? */
|
pointer? */
|
|
|
static void
|
static void
|
avr_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
|
avr_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
|
CORE_ADDR *targ_addr, int *targ_len)
|
CORE_ADDR *targ_addr, int *targ_len)
|
{
|
{
|
long out_addr;
|
long out_addr;
|
long out_len;
|
long out_len;
|
|
|
/* FIXME: TRoth: Do nothing for now. Will need to examine memaddr at this
|
/* FIXME: TRoth: Do nothing for now. Will need to examine memaddr at this
|
point and see if the high bit are set with the masks that we want. */
|
point and see if the high bit are set with the masks that we want. */
|
|
|
*targ_addr = memaddr;
|
*targ_addr = memaddr;
|
*targ_len = nr_bytes;
|
*targ_len = nr_bytes;
|
}
|
}
|
|
|
/* Function pointers obtained from the target are half of what gdb expects so
|
/* Function pointers obtained from the target are half of what gdb expects so
|
multiply by 2. */
|
multiply by 2. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_convert_from_func_ptr_addr (CORE_ADDR addr)
|
avr_convert_from_func_ptr_addr (CORE_ADDR addr)
|
{
|
{
|
return addr * 2;
|
return addr * 2;
|
}
|
}
|
|
|
/* avr_scan_prologue is also used as the frame_init_saved_regs().
|
/* avr_scan_prologue is also used as the frame_init_saved_regs().
|
|
|
Put here the code to store, into fi->saved_regs, the addresses of
|
Put here the code to store, into fi->saved_regs, the addresses of
|
the saved registers of frame described by FRAME_INFO. This
|
the saved registers of frame described by FRAME_INFO. This
|
includes special registers such as pc and fp saved in special ways
|
includes special registers such as pc and fp saved in special ways
|
in the stack frame. sp is even more special: the address we return
|
in the stack frame. sp is even more special: the address we return
|
for it IS the sp for the next frame. */
|
for it IS the sp for the next frame. */
|
|
|
/* Function: avr_scan_prologue (helper function for avr_init_extra_frame_info)
|
/* Function: avr_scan_prologue (helper function for avr_init_extra_frame_info)
|
This function decodes a AVR function prologue to determine:
|
This function decodes a AVR function prologue to determine:
|
1) the size of the stack frame
|
1) the size of the stack frame
|
2) which registers are saved on it
|
2) which registers are saved on it
|
3) the offsets of saved regs
|
3) the offsets of saved regs
|
This information is stored in the "extra_info" field of the frame_info.
|
This information is stored in the "extra_info" field of the frame_info.
|
|
|
A typical AVR function prologue might look like this:
|
A typical AVR function prologue might look like this:
|
push rXX
|
push rXX
|
push r28
|
push r28
|
push r29
|
push r29
|
in r28,__SP_L__
|
in r28,__SP_L__
|
in r29,__SP_H__
|
in r29,__SP_H__
|
sbiw r28,<LOCALS_SIZE>
|
sbiw r28,<LOCALS_SIZE>
|
in __tmp_reg__,__SREG__
|
in __tmp_reg__,__SREG__
|
cli
|
cli
|
out __SP_L__,r28
|
out __SP_L__,r28
|
out __SREG__,__tmp_reg__
|
out __SREG__,__tmp_reg__
|
out __SP_H__,r29
|
out __SP_H__,r29
|
|
|
A `-mcall-prologues' prologue look like this:
|
A `-mcall-prologues' prologue look like this:
|
ldi r26,<LOCALS_SIZE>
|
ldi r26,<LOCALS_SIZE>
|
ldi r27,<LOCALS_SIZE>/265
|
ldi r27,<LOCALS_SIZE>/265
|
ldi r30,pm_lo8(.L_foo_body)
|
ldi r30,pm_lo8(.L_foo_body)
|
ldi r31,pm_hi8(.L_foo_body)
|
ldi r31,pm_hi8(.L_foo_body)
|
rjmp __prologue_saves__+RRR
|
rjmp __prologue_saves__+RRR
|
.L_foo_body: */
|
.L_foo_body: */
|
|
|
static void
|
static void
|
avr_scan_prologue (struct frame_info *fi)
|
avr_scan_prologue (struct frame_info *fi)
|
{
|
{
|
CORE_ADDR prologue_start;
|
CORE_ADDR prologue_start;
|
CORE_ADDR prologue_end;
|
CORE_ADDR prologue_end;
|
int i;
|
int i;
|
unsigned short insn;
|
unsigned short insn;
|
int regno;
|
int regno;
|
int scan_stage = 0;
|
int scan_stage = 0;
|
char *name;
|
char *name;
|
struct minimal_symbol *msymbol;
|
struct minimal_symbol *msymbol;
|
int prologue_len;
|
int prologue_len;
|
unsigned char prologue[AVR_MAX_PROLOGUE_SIZE];
|
unsigned char prologue[AVR_MAX_PROLOGUE_SIZE];
|
int vpc = 0;
|
int vpc = 0;
|
|
|
fi->extra_info->framereg = AVR_SP_REGNUM;
|
fi->extra_info->framereg = AVR_SP_REGNUM;
|
|
|
if (find_pc_partial_function
|
if (find_pc_partial_function
|
(fi->pc, &name, &prologue_start, &prologue_end))
|
(fi->pc, &name, &prologue_start, &prologue_end))
|
{
|
{
|
struct symtab_and_line sal = find_pc_line (prologue_start, 0);
|
struct symtab_and_line sal = find_pc_line (prologue_start, 0);
|
|
|
if (sal.line == 0) /* no line info, use current PC */
|
if (sal.line == 0) /* no line info, use current PC */
|
prologue_end = fi->pc;
|
prologue_end = fi->pc;
|
else if (sal.end < prologue_end) /* next line begins after fn end */
|
else if (sal.end < prologue_end) /* next line begins after fn end */
|
prologue_end = sal.end; /* (probably means no prologue) */
|
prologue_end = sal.end; /* (probably means no prologue) */
|
}
|
}
|
else
|
else
|
/* We're in the boondocks: allow for */
|
/* We're in the boondocks: allow for */
|
/* 19 pushes, an add, and "mv fp,sp" */
|
/* 19 pushes, an add, and "mv fp,sp" */
|
prologue_end = prologue_start + AVR_MAX_PROLOGUE_SIZE;
|
prologue_end = prologue_start + AVR_MAX_PROLOGUE_SIZE;
|
|
|
prologue_end = min (prologue_end, fi->pc);
|
prologue_end = min (prologue_end, fi->pc);
|
|
|
/* Search the prologue looking for instructions that set up the
|
/* Search the prologue looking for instructions that set up the
|
frame pointer, adjust the stack pointer, and save registers. */
|
frame pointer, adjust the stack pointer, and save registers. */
|
|
|
fi->extra_info->framesize = 0;
|
fi->extra_info->framesize = 0;
|
prologue_len = prologue_end - prologue_start;
|
prologue_len = prologue_end - prologue_start;
|
read_memory (prologue_start, prologue, prologue_len);
|
read_memory (prologue_start, prologue, prologue_len);
|
|
|
/* Scanning main()'s prologue
|
/* Scanning main()'s prologue
|
ldi r28,lo8(<RAM_ADDR> - <LOCALS_SIZE>)
|
ldi r28,lo8(<RAM_ADDR> - <LOCALS_SIZE>)
|
ldi r29,hi8(<RAM_ADDR> - <LOCALS_SIZE>)
|
ldi r29,hi8(<RAM_ADDR> - <LOCALS_SIZE>)
|
out __SP_H__,r29
|
out __SP_H__,r29
|
out __SP_L__,r28 */
|
out __SP_L__,r28 */
|
|
|
if (name && strcmp ("main", name) == 0 && prologue_len == 8)
|
if (name && strcmp ("main", name) == 0 && prologue_len == 8)
|
{
|
{
|
CORE_ADDR locals;
|
CORE_ADDR locals;
|
unsigned char img[] = {
|
unsigned char img[] = {
|
0xde, 0xbf, /* out __SP_H__,r29 */
|
0xde, 0xbf, /* out __SP_H__,r29 */
|
0xcd, 0xbf /* out __SP_L__,r28 */
|
0xcd, 0xbf /* out __SP_L__,r28 */
|
};
|
};
|
|
|
fi->extra_info->framereg = AVR_FP_REGNUM;
|
fi->extra_info->framereg = AVR_FP_REGNUM;
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
/* ldi r28,lo8(<RAM_ADDR> - <LOCALS_SIZE>) */
|
/* ldi r28,lo8(<RAM_ADDR> - <LOCALS_SIZE>) */
|
if ((insn & 0xf0f0) == 0xe0c0)
|
if ((insn & 0xf0f0) == 0xe0c0)
|
{
|
{
|
locals = (insn & 0xf) | ((insn & 0x0f00) >> 4);
|
locals = (insn & 0xf) | ((insn & 0x0f00) >> 4);
|
insn = EXTRACT_INSN (&prologue[vpc + 2]);
|
insn = EXTRACT_INSN (&prologue[vpc + 2]);
|
/* ldi r29,hi8(<RAM_ADDR> - <LOCALS_SIZE>) */
|
/* ldi r29,hi8(<RAM_ADDR> - <LOCALS_SIZE>) */
|
if ((insn & 0xf0f0) == 0xe0d0)
|
if ((insn & 0xf0f0) == 0xe0d0)
|
{
|
{
|
locals |= ((insn & 0xf) | ((insn & 0x0f00) >> 4)) << 8;
|
locals |= ((insn & 0xf) | ((insn & 0x0f00) >> 4)) << 8;
|
if (memcmp (prologue + vpc + 4, img, sizeof (img)) == 0)
|
if (memcmp (prologue + vpc + 4, img, sizeof (img)) == 0)
|
{
|
{
|
fi->frame = locals;
|
fi->frame = locals;
|
|
|
fi->extra_info->is_main = 1;
|
fi->extra_info->is_main = 1;
|
return;
|
return;
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/* Scanning `-mcall-prologues' prologue
|
/* Scanning `-mcall-prologues' prologue
|
FIXME: mega prologue have a 12 bytes long */
|
FIXME: mega prologue have a 12 bytes long */
|
|
|
while (prologue_len <= 12) /* I'm use while to avoit many goto's */
|
while (prologue_len <= 12) /* I'm use while to avoit many goto's */
|
{
|
{
|
int loc_size;
|
int loc_size;
|
int body_addr;
|
int body_addr;
|
unsigned num_pushes;
|
unsigned num_pushes;
|
|
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
/* ldi r26,<LOCALS_SIZE> */
|
/* ldi r26,<LOCALS_SIZE> */
|
if ((insn & 0xf0f0) != 0xe0a0)
|
if ((insn & 0xf0f0) != 0xe0a0)
|
break;
|
break;
|
loc_size = (insn & 0xf) | ((insn & 0x0f00) >> 4);
|
loc_size = (insn & 0xf) | ((insn & 0x0f00) >> 4);
|
|
|
insn = EXTRACT_INSN (&prologue[vpc + 2]);
|
insn = EXTRACT_INSN (&prologue[vpc + 2]);
|
/* ldi r27,<LOCALS_SIZE> / 256 */
|
/* ldi r27,<LOCALS_SIZE> / 256 */
|
if ((insn & 0xf0f0) != 0xe0b0)
|
if ((insn & 0xf0f0) != 0xe0b0)
|
break;
|
break;
|
loc_size |= ((insn & 0xf) | ((insn & 0x0f00) >> 4)) << 8;
|
loc_size |= ((insn & 0xf) | ((insn & 0x0f00) >> 4)) << 8;
|
|
|
insn = EXTRACT_INSN (&prologue[vpc + 4]);
|
insn = EXTRACT_INSN (&prologue[vpc + 4]);
|
/* ldi r30,pm_lo8(.L_foo_body) */
|
/* ldi r30,pm_lo8(.L_foo_body) */
|
if ((insn & 0xf0f0) != 0xe0e0)
|
if ((insn & 0xf0f0) != 0xe0e0)
|
break;
|
break;
|
body_addr = (insn & 0xf) | ((insn & 0x0f00) >> 4);
|
body_addr = (insn & 0xf) | ((insn & 0x0f00) >> 4);
|
|
|
insn = EXTRACT_INSN (&prologue[vpc + 6]);
|
insn = EXTRACT_INSN (&prologue[vpc + 6]);
|
/* ldi r31,pm_hi8(.L_foo_body) */
|
/* ldi r31,pm_hi8(.L_foo_body) */
|
if ((insn & 0xf0f0) != 0xe0f0)
|
if ((insn & 0xf0f0) != 0xe0f0)
|
break;
|
break;
|
body_addr |= ((insn & 0xf) | ((insn & 0x0f00) >> 4)) << 8;
|
body_addr |= ((insn & 0xf) | ((insn & 0x0f00) >> 4)) << 8;
|
|
|
if (body_addr != (prologue_start + 10) / 2)
|
if (body_addr != (prologue_start + 10) / 2)
|
break;
|
break;
|
|
|
msymbol = lookup_minimal_symbol ("__prologue_saves__", NULL, NULL);
|
msymbol = lookup_minimal_symbol ("__prologue_saves__", NULL, NULL);
|
if (!msymbol)
|
if (!msymbol)
|
break;
|
break;
|
|
|
/* FIXME: prologue for mega have a JMP instead of RJMP */
|
/* FIXME: prologue for mega have a JMP instead of RJMP */
|
insn = EXTRACT_INSN (&prologue[vpc + 8]);
|
insn = EXTRACT_INSN (&prologue[vpc + 8]);
|
/* rjmp __prologue_saves__+RRR */
|
/* rjmp __prologue_saves__+RRR */
|
if ((insn & 0xf000) != 0xc000)
|
if ((insn & 0xf000) != 0xc000)
|
break;
|
break;
|
|
|
/* Extract PC relative offset from RJMP */
|
/* Extract PC relative offset from RJMP */
|
i = (insn & 0xfff) | (insn & 0x800 ? (-1 ^ 0xfff) : 0);
|
i = (insn & 0xfff) | (insn & 0x800 ? (-1 ^ 0xfff) : 0);
|
/* Convert offset to byte addressable mode */
|
/* Convert offset to byte addressable mode */
|
i *= 2;
|
i *= 2;
|
/* Destination address */
|
/* Destination address */
|
i += vpc + prologue_start + 10;
|
i += vpc + prologue_start + 10;
|
/* Resovle offset (in words) from __prologue_saves__ symbol.
|
/* Resovle offset (in words) from __prologue_saves__ symbol.
|
Which is a pushes count in `-mcall-prologues' mode */
|
Which is a pushes count in `-mcall-prologues' mode */
|
num_pushes = AVR_MAX_PUSHES - (i - SYMBOL_VALUE_ADDRESS (msymbol)) / 2;
|
num_pushes = AVR_MAX_PUSHES - (i - SYMBOL_VALUE_ADDRESS (msymbol)) / 2;
|
|
|
if (num_pushes > AVR_MAX_PUSHES)
|
if (num_pushes > AVR_MAX_PUSHES)
|
num_pushes = 0;
|
num_pushes = 0;
|
|
|
if (num_pushes)
|
if (num_pushes)
|
{
|
{
|
int from;
|
int from;
|
fi->saved_regs[AVR_FP_REGNUM + 1] = num_pushes;
|
fi->saved_regs[AVR_FP_REGNUM + 1] = num_pushes;
|
if (num_pushes >= 2)
|
if (num_pushes >= 2)
|
fi->saved_regs[AVR_FP_REGNUM] = num_pushes - 1;
|
fi->saved_regs[AVR_FP_REGNUM] = num_pushes - 1;
|
i = 0;
|
i = 0;
|
for (from = AVR_LAST_PUSHED_REGNUM + 1 - (num_pushes - 2);
|
for (from = AVR_LAST_PUSHED_REGNUM + 1 - (num_pushes - 2);
|
from <= AVR_LAST_PUSHED_REGNUM; ++from)
|
from <= AVR_LAST_PUSHED_REGNUM; ++from)
|
fi->saved_regs[from] = ++i;
|
fi->saved_regs[from] = ++i;
|
}
|
}
|
fi->extra_info->locals_size = loc_size;
|
fi->extra_info->locals_size = loc_size;
|
fi->extra_info->framesize = loc_size + num_pushes;
|
fi->extra_info->framesize = loc_size + num_pushes;
|
fi->extra_info->framereg = AVR_FP_REGNUM;
|
fi->extra_info->framereg = AVR_FP_REGNUM;
|
return;
|
return;
|
}
|
}
|
|
|
/* Scan interrupt or signal function */
|
/* Scan interrupt or signal function */
|
|
|
if (prologue_len >= 12)
|
if (prologue_len >= 12)
|
{
|
{
|
unsigned char img[] = {
|
unsigned char img[] = {
|
0x78, 0x94, /* sei */
|
0x78, 0x94, /* sei */
|
0x1f, 0x92, /* push r1 */
|
0x1f, 0x92, /* push r1 */
|
0x0f, 0x92, /* push r0 */
|
0x0f, 0x92, /* push r0 */
|
0x0f, 0xb6, /* in r0,0x3f SREG */
|
0x0f, 0xb6, /* in r0,0x3f SREG */
|
0x0f, 0x92, /* push r0 */
|
0x0f, 0x92, /* push r0 */
|
0x11, 0x24 /* clr r1 */
|
0x11, 0x24 /* clr r1 */
|
};
|
};
|
if (memcmp (prologue, img, sizeof (img)) == 0)
|
if (memcmp (prologue, img, sizeof (img)) == 0)
|
{
|
{
|
vpc += sizeof (img);
|
vpc += sizeof (img);
|
fi->saved_regs[0] = 2;
|
fi->saved_regs[0] = 2;
|
fi->saved_regs[1] = 1;
|
fi->saved_regs[1] = 1;
|
fi->extra_info->framesize += 3;
|
fi->extra_info->framesize += 3;
|
}
|
}
|
else if (memcmp (img + 1, prologue, sizeof (img) - 1) == 0)
|
else if (memcmp (img + 1, prologue, sizeof (img) - 1) == 0)
|
{
|
{
|
vpc += sizeof (img) - 1;
|
vpc += sizeof (img) - 1;
|
fi->saved_regs[0] = 2;
|
fi->saved_regs[0] = 2;
|
fi->saved_regs[1] = 1;
|
fi->saved_regs[1] = 1;
|
fi->extra_info->framesize += 3;
|
fi->extra_info->framesize += 3;
|
}
|
}
|
}
|
}
|
|
|
/* First stage of the prologue scanning.
|
/* First stage of the prologue scanning.
|
Scan pushes */
|
Scan pushes */
|
|
|
for (; vpc <= prologue_len; vpc += 2)
|
for (; vpc <= prologue_len; vpc += 2)
|
{
|
{
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
if ((insn & 0xfe0f) == 0x920f) /* push rXX */
|
if ((insn & 0xfe0f) == 0x920f) /* push rXX */
|
{
|
{
|
/* Bits 4-9 contain a mask for registers R0-R32. */
|
/* Bits 4-9 contain a mask for registers R0-R32. */
|
regno = (insn & 0x1f0) >> 4;
|
regno = (insn & 0x1f0) >> 4;
|
++fi->extra_info->framesize;
|
++fi->extra_info->framesize;
|
fi->saved_regs[regno] = fi->extra_info->framesize;
|
fi->saved_regs[regno] = fi->extra_info->framesize;
|
scan_stage = 1;
|
scan_stage = 1;
|
}
|
}
|
else
|
else
|
break;
|
break;
|
}
|
}
|
|
|
/* Second stage of the prologue scanning.
|
/* Second stage of the prologue scanning.
|
Scan:
|
Scan:
|
in r28,__SP_L__
|
in r28,__SP_L__
|
in r29,__SP_H__ */
|
in r29,__SP_H__ */
|
|
|
if (scan_stage == 1 && vpc + 4 <= prologue_len)
|
if (scan_stage == 1 && vpc + 4 <= prologue_len)
|
{
|
{
|
unsigned char img[] = {
|
unsigned char img[] = {
|
0xcd, 0xb7, /* in r28,__SP_L__ */
|
0xcd, 0xb7, /* in r28,__SP_L__ */
|
0xde, 0xb7 /* in r29,__SP_H__ */
|
0xde, 0xb7 /* in r29,__SP_H__ */
|
};
|
};
|
unsigned short insn1;
|
unsigned short insn1;
|
|
|
if (memcmp (prologue + vpc, img, sizeof (img)) == 0)
|
if (memcmp (prologue + vpc, img, sizeof (img)) == 0)
|
{
|
{
|
vpc += 4;
|
vpc += 4;
|
fi->extra_info->framereg = AVR_FP_REGNUM;
|
fi->extra_info->framereg = AVR_FP_REGNUM;
|
scan_stage = 2;
|
scan_stage = 2;
|
}
|
}
|
}
|
}
|
|
|
/* Third stage of the prologue scanning. (Really two stages)
|
/* Third stage of the prologue scanning. (Really two stages)
|
Scan for:
|
Scan for:
|
sbiw r28,XX or subi r28,lo8(XX)
|
sbiw r28,XX or subi r28,lo8(XX)
|
sbci r29,hi8(XX)
|
sbci r29,hi8(XX)
|
in __tmp_reg__,__SREG__
|
in __tmp_reg__,__SREG__
|
cli
|
cli
|
out __SP_L__,r28
|
out __SP_L__,r28
|
out __SREG__,__tmp_reg__
|
out __SREG__,__tmp_reg__
|
out __SP_H__,r29 */
|
out __SP_H__,r29 */
|
|
|
if (scan_stage == 2 && vpc + 12 <= prologue_len)
|
if (scan_stage == 2 && vpc + 12 <= prologue_len)
|
{
|
{
|
int locals_size = 0;
|
int locals_size = 0;
|
unsigned char img[] = {
|
unsigned char img[] = {
|
0x0f, 0xb6, /* in r0,0x3f */
|
0x0f, 0xb6, /* in r0,0x3f */
|
0xf8, 0x94, /* cli */
|
0xf8, 0x94, /* cli */
|
0xcd, 0xbf, /* out 0x3d,r28 ; SPL */
|
0xcd, 0xbf, /* out 0x3d,r28 ; SPL */
|
0x0f, 0xbe, /* out 0x3f,r0 ; SREG */
|
0x0f, 0xbe, /* out 0x3f,r0 ; SREG */
|
0xde, 0xbf /* out 0x3e,r29 ; SPH */
|
0xde, 0xbf /* out 0x3e,r29 ; SPH */
|
};
|
};
|
unsigned char img_sig[] = {
|
unsigned char img_sig[] = {
|
0xcd, 0xbf, /* out 0x3d,r28 ; SPL */
|
0xcd, 0xbf, /* out 0x3d,r28 ; SPL */
|
0xde, 0xbf /* out 0x3e,r29 ; SPH */
|
0xde, 0xbf /* out 0x3e,r29 ; SPH */
|
};
|
};
|
unsigned char img_int[] = {
|
unsigned char img_int[] = {
|
0xf8, 0x94, /* cli */
|
0xf8, 0x94, /* cli */
|
0xcd, 0xbf, /* out 0x3d,r28 ; SPL */
|
0xcd, 0xbf, /* out 0x3d,r28 ; SPL */
|
0x78, 0x94, /* sei */
|
0x78, 0x94, /* sei */
|
0xde, 0xbf /* out 0x3e,r29 ; SPH */
|
0xde, 0xbf /* out 0x3e,r29 ; SPH */
|
};
|
};
|
|
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
vpc += 2;
|
vpc += 2;
|
if ((insn & 0xff30) == 0x9720) /* sbiw r28,XXX */
|
if ((insn & 0xff30) == 0x9720) /* sbiw r28,XXX */
|
locals_size = (insn & 0xf) | ((insn & 0xc0) >> 2);
|
locals_size = (insn & 0xf) | ((insn & 0xc0) >> 2);
|
else if ((insn & 0xf0f0) == 0x50c0) /* subi r28,lo8(XX) */
|
else if ((insn & 0xf0f0) == 0x50c0) /* subi r28,lo8(XX) */
|
{
|
{
|
locals_size = (insn & 0xf) | ((insn & 0xf00) >> 4);
|
locals_size = (insn & 0xf) | ((insn & 0xf00) >> 4);
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
insn = EXTRACT_INSN (&prologue[vpc]);
|
vpc += 2;
|
vpc += 2;
|
locals_size += ((insn & 0xf) | ((insn & 0xf00) >> 4) << 8);
|
locals_size += ((insn & 0xf) | ((insn & 0xf00) >> 4) << 8);
|
}
|
}
|
else
|
else
|
return;
|
return;
|
fi->extra_info->locals_size = locals_size;
|
fi->extra_info->locals_size = locals_size;
|
fi->extra_info->framesize += locals_size;
|
fi->extra_info->framesize += locals_size;
|
}
|
}
|
}
|
}
|
|
|
/* This function actually figures out the frame address for a given pc and
|
/* This function actually figures out the frame address for a given pc and
|
sp. This is tricky because we sometimes don't use an explicit
|
sp. This is tricky because we sometimes don't use an explicit
|
frame pointer, and the previous stack pointer isn't necessarily recorded
|
frame pointer, and the previous stack pointer isn't necessarily recorded
|
on the stack. The only reliable way to get this info is to
|
on the stack. The only reliable way to get this info is to
|
examine the prologue. */
|
examine the prologue. */
|
|
|
static void
|
static void
|
avr_init_extra_frame_info (int fromleaf, struct frame_info *fi)
|
avr_init_extra_frame_info (int fromleaf, struct frame_info *fi)
|
{
|
{
|
int reg;
|
int reg;
|
|
|
if (fi->next)
|
if (fi->next)
|
fi->pc = FRAME_SAVED_PC (fi->next);
|
fi->pc = FRAME_SAVED_PC (fi->next);
|
|
|
fi->extra_info = (struct frame_extra_info *)
|
fi->extra_info = (struct frame_extra_info *)
|
frame_obstack_alloc (sizeof (struct frame_extra_info));
|
frame_obstack_alloc (sizeof (struct frame_extra_info));
|
frame_saved_regs_zalloc (fi);
|
frame_saved_regs_zalloc (fi);
|
|
|
fi->extra_info->return_pc = 0;
|
fi->extra_info->return_pc = 0;
|
fi->extra_info->args_pointer = 0;
|
fi->extra_info->args_pointer = 0;
|
fi->extra_info->locals_size = 0;
|
fi->extra_info->locals_size = 0;
|
fi->extra_info->framereg = 0;
|
fi->extra_info->framereg = 0;
|
fi->extra_info->framesize = 0;
|
fi->extra_info->framesize = 0;
|
fi->extra_info->is_main = 0;
|
fi->extra_info->is_main = 0;
|
|
|
avr_scan_prologue (fi);
|
avr_scan_prologue (fi);
|
|
|
if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
|
if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
|
{
|
{
|
/* We need to setup fi->frame here because run_stack_dummy gets it wrong
|
/* We need to setup fi->frame here because run_stack_dummy gets it wrong
|
by assuming it's always FP. */
|
by assuming it's always FP. */
|
fi->frame = generic_read_register_dummy (fi->pc, fi->frame,
|
fi->frame = generic_read_register_dummy (fi->pc, fi->frame,
|
AVR_PC_REGNUM);
|
AVR_PC_REGNUM);
|
}
|
}
|
else if (!fi->next) /* this is the innermost frame? */
|
else if (!fi->next) /* this is the innermost frame? */
|
fi->frame = read_register (fi->extra_info->framereg);
|
fi->frame = read_register (fi->extra_info->framereg);
|
else if (fi->extra_info->is_main != 1) /* not the innermost frame, not `main' */
|
else if (fi->extra_info->is_main != 1) /* not the innermost frame, not `main' */
|
/* If we have an next frame, the callee saved it. */
|
/* If we have an next frame, the callee saved it. */
|
{
|
{
|
struct frame_info *next_fi = fi->next;
|
struct frame_info *next_fi = fi->next;
|
if (fi->extra_info->framereg == AVR_SP_REGNUM)
|
if (fi->extra_info->framereg == AVR_SP_REGNUM)
|
fi->frame =
|
fi->frame =
|
next_fi->frame + 2 /* ret addr */ + next_fi->extra_info->framesize;
|
next_fi->frame + 2 /* ret addr */ + next_fi->extra_info->framesize;
|
/* FIXME: I don't analyse va_args functions */
|
/* FIXME: I don't analyse va_args functions */
|
else
|
else
|
{
|
{
|
CORE_ADDR fp = 0;
|
CORE_ADDR fp = 0;
|
CORE_ADDR fp1 = 0;
|
CORE_ADDR fp1 = 0;
|
unsigned int fp_low, fp_high;
|
unsigned int fp_low, fp_high;
|
|
|
/* Scan all frames */
|
/* Scan all frames */
|
for (; next_fi; next_fi = next_fi->next)
|
for (; next_fi; next_fi = next_fi->next)
|
{
|
{
|
/* look for saved AVR_FP_REGNUM */
|
/* look for saved AVR_FP_REGNUM */
|
if (next_fi->saved_regs[AVR_FP_REGNUM] && !fp)
|
if (next_fi->saved_regs[AVR_FP_REGNUM] && !fp)
|
fp = next_fi->saved_regs[AVR_FP_REGNUM];
|
fp = next_fi->saved_regs[AVR_FP_REGNUM];
|
/* look for saved AVR_FP_REGNUM + 1 */
|
/* look for saved AVR_FP_REGNUM + 1 */
|
if (next_fi->saved_regs[AVR_FP_REGNUM + 1] && !fp1)
|
if (next_fi->saved_regs[AVR_FP_REGNUM + 1] && !fp1)
|
fp1 = next_fi->saved_regs[AVR_FP_REGNUM + 1];
|
fp1 = next_fi->saved_regs[AVR_FP_REGNUM + 1];
|
}
|
}
|
fp_low = (fp ? read_memory_unsigned_integer (avr_make_saddr (fp), 1)
|
fp_low = (fp ? read_memory_unsigned_integer (avr_make_saddr (fp), 1)
|
: read_register (AVR_FP_REGNUM)) & 0xff;
|
: read_register (AVR_FP_REGNUM)) & 0xff;
|
fp_high =
|
fp_high =
|
(fp1 ? read_memory_unsigned_integer (avr_make_saddr (fp1), 1) :
|
(fp1 ? read_memory_unsigned_integer (avr_make_saddr (fp1), 1) :
|
read_register (AVR_FP_REGNUM + 1)) & 0xff;
|
read_register (AVR_FP_REGNUM + 1)) & 0xff;
|
fi->frame = fp_low | (fp_high << 8);
|
fi->frame = fp_low | (fp_high << 8);
|
}
|
}
|
}
|
}
|
|
|
/* TRoth: Do we want to do this if we are in main? I don't think we should
|
/* TRoth: Do we want to do this if we are in main? I don't think we should
|
since return_pc makes no sense when we are in main. */
|
since return_pc makes no sense when we are in main. */
|
|
|
if ((fi->pc) && (fi->extra_info->is_main == 0)) /* We are not in CALL_DUMMY */
|
if ((fi->pc) && (fi->extra_info->is_main == 0)) /* We are not in CALL_DUMMY */
|
{
|
{
|
CORE_ADDR addr;
|
CORE_ADDR addr;
|
int i;
|
int i;
|
|
|
addr = fi->frame + fi->extra_info->framesize + 1;
|
addr = fi->frame + fi->extra_info->framesize + 1;
|
|
|
/* Return address in stack in different endianness */
|
/* Return address in stack in different endianness */
|
|
|
fi->extra_info->return_pc =
|
fi->extra_info->return_pc =
|
read_memory_unsigned_integer (avr_make_saddr (addr), 1) << 8;
|
read_memory_unsigned_integer (avr_make_saddr (addr), 1) << 8;
|
fi->extra_info->return_pc |=
|
fi->extra_info->return_pc |=
|
read_memory_unsigned_integer (avr_make_saddr (addr + 1), 1);
|
read_memory_unsigned_integer (avr_make_saddr (addr + 1), 1);
|
|
|
/* This return address in words,
|
/* This return address in words,
|
must be converted to the bytes address */
|
must be converted to the bytes address */
|
fi->extra_info->return_pc *= 2;
|
fi->extra_info->return_pc *= 2;
|
|
|
/* Resolve a pushed registers addresses */
|
/* Resolve a pushed registers addresses */
|
for (i = 0; i < NUM_REGS; i++)
|
for (i = 0; i < NUM_REGS; i++)
|
{
|
{
|
if (fi->saved_regs[i])
|
if (fi->saved_regs[i])
|
fi->saved_regs[i] = addr - fi->saved_regs[i];
|
fi->saved_regs[i] = addr - fi->saved_regs[i];
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/* Restore the machine to the state it had before the current frame was
|
/* Restore the machine to the state it had before the current frame was
|
created. Usually used either by the "RETURN" command, or by
|
created. Usually used either by the "RETURN" command, or by
|
call_function_by_hand after the dummy_frame is finished. */
|
call_function_by_hand after the dummy_frame is finished. */
|
|
|
static void
|
static void
|
avr_pop_frame (void)
|
avr_pop_frame (void)
|
{
|
{
|
unsigned regnum;
|
unsigned regnum;
|
CORE_ADDR saddr;
|
CORE_ADDR saddr;
|
struct frame_info *frame = get_current_frame ();
|
struct frame_info *frame = get_current_frame ();
|
|
|
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 ();
|
generic_pop_dummy_frame ();
|
}
|
}
|
else
|
else
|
{
|
{
|
/* TRoth: Why only loop over 8 registers? */
|
/* TRoth: Why only loop over 8 registers? */
|
|
|
for (regnum = 0; regnum < 8; regnum++)
|
for (regnum = 0; regnum < 8; regnum++)
|
{
|
{
|
/* Don't forget AVR_SP_REGNUM in a frame_saved_regs struct is the
|
/* Don't forget AVR_SP_REGNUM in a frame_saved_regs struct is the
|
actual value we want, not the address of the value we want. */
|
actual value we want, not the address of the value we want. */
|
if (frame->saved_regs[regnum] && regnum != AVR_SP_REGNUM)
|
if (frame->saved_regs[regnum] && regnum != AVR_SP_REGNUM)
|
{
|
{
|
saddr = avr_make_saddr (frame->saved_regs[regnum]);
|
saddr = avr_make_saddr (frame->saved_regs[regnum]);
|
write_register (regnum,
|
write_register (regnum,
|
read_memory_unsigned_integer (saddr, 1));
|
read_memory_unsigned_integer (saddr, 1));
|
}
|
}
|
else if (frame->saved_regs[regnum] && regnum == AVR_SP_REGNUM)
|
else if (frame->saved_regs[regnum] && regnum == AVR_SP_REGNUM)
|
write_register (regnum, frame->frame + 2);
|
write_register (regnum, frame->frame + 2);
|
}
|
}
|
|
|
/* Don't forget the update the PC too! */
|
/* Don't forget the update the PC too! */
|
write_pc (frame->extra_info->return_pc);
|
write_pc (frame->extra_info->return_pc);
|
}
|
}
|
flush_cached_frames ();
|
flush_cached_frames ();
|
}
|
}
|
|
|
/* Return the saved PC from this frame. */
|
/* Return the saved PC from this frame. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_frame_saved_pc (struct frame_info *frame)
|
avr_frame_saved_pc (struct frame_info *frame)
|
{
|
{
|
if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
|
if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
|
return generic_read_register_dummy (frame->pc, frame->frame,
|
return generic_read_register_dummy (frame->pc, frame->frame,
|
AVR_PC_REGNUM);
|
AVR_PC_REGNUM);
|
else
|
else
|
return frame->extra_info->return_pc;
|
return frame->extra_info->return_pc;
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_saved_pc_after_call (struct frame_info *frame)
|
avr_saved_pc_after_call (struct frame_info *frame)
|
{
|
{
|
unsigned char m1, m2;
|
unsigned char m1, m2;
|
unsigned int sp = read_register (AVR_SP_REGNUM);
|
unsigned int sp = read_register (AVR_SP_REGNUM);
|
m1 = read_memory_unsigned_integer (avr_make_saddr (sp + 1), 1);
|
m1 = read_memory_unsigned_integer (avr_make_saddr (sp + 1), 1);
|
m2 = read_memory_unsigned_integer (avr_make_saddr (sp + 2), 1);
|
m2 = read_memory_unsigned_integer (avr_make_saddr (sp + 2), 1);
|
return (m2 | (m1 << 8)) * 2;
|
return (m2 | (m1 << 8)) * 2;
|
}
|
}
|
|
|
/* Figure out where in REGBUF the called function has left its return value.
|
/* Figure out where in REGBUF the called function has left its return value.
|
Copy that into VALBUF. */
|
Copy that into VALBUF. */
|
|
|
static void
|
static void
|
avr_extract_return_value (struct type *type, char *regbuf, char *valbuf)
|
avr_extract_return_value (struct type *type, char *regbuf, char *valbuf)
|
{
|
{
|
int wordsize, len;
|
int wordsize, len;
|
|
|
wordsize = 2;
|
wordsize = 2;
|
|
|
len = TYPE_LENGTH (type);
|
len = TYPE_LENGTH (type);
|
|
|
switch (len)
|
switch (len)
|
{
|
{
|
case 1: /* (char) */
|
case 1: /* (char) */
|
case 2: /* (short), (int) */
|
case 2: /* (short), (int) */
|
memcpy (valbuf, regbuf + REGISTER_BYTE (24), 2);
|
memcpy (valbuf, regbuf + REGISTER_BYTE (24), 2);
|
break;
|
break;
|
case 4: /* (long), (float) */
|
case 4: /* (long), (float) */
|
memcpy (valbuf, regbuf + REGISTER_BYTE (22), 4);
|
memcpy (valbuf, regbuf + REGISTER_BYTE (22), 4);
|
break;
|
break;
|
case 8: /* (double) (doesn't seem to happen, which is good,
|
case 8: /* (double) (doesn't seem to happen, which is good,
|
because this almost certainly isn't right. */
|
because this almost certainly isn't right. */
|
error ("I don't know how a double is returned.");
|
error ("I don't know how a double is returned.");
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
/* Returns the return address for a dummy. */
|
/* Returns the return address for a dummy. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_call_dummy_address (void)
|
avr_call_dummy_address (void)
|
{
|
{
|
return entry_point_address ();
|
return entry_point_address ();
|
}
|
}
|
|
|
/* Place the appropriate value in the appropriate registers.
|
/* Place the appropriate value in the appropriate registers.
|
Primarily used by the RETURN command. */
|
Primarily used by the RETURN command. */
|
|
|
static void
|
static void
|
avr_store_return_value (struct type *type, char *valbuf)
|
avr_store_return_value (struct type *type, char *valbuf)
|
{
|
{
|
int wordsize, len, regval;
|
int wordsize, len, regval;
|
|
|
wordsize = 2;
|
wordsize = 2;
|
|
|
len = TYPE_LENGTH (type);
|
len = TYPE_LENGTH (type);
|
switch (len)
|
switch (len)
|
{
|
{
|
case 1: /* char */
|
case 1: /* char */
|
case 2: /* short, int */
|
case 2: /* short, int */
|
regval = extract_address (valbuf, len);
|
regval = extract_address (valbuf, len);
|
write_register (0, regval);
|
write_register (0, regval);
|
break;
|
break;
|
case 4: /* long, float */
|
case 4: /* long, float */
|
regval = extract_address (valbuf, len);
|
regval = extract_address (valbuf, len);
|
write_register (0, regval >> 16);
|
write_register (0, regval >> 16);
|
write_register (1, regval & 0xffff);
|
write_register (1, regval & 0xffff);
|
break;
|
break;
|
case 8: /* presumeably double, but doesn't seem to happen */
|
case 8: /* presumeably double, but doesn't seem to happen */
|
error ("I don't know how to return a double.");
|
error ("I don't know how to return a double.");
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
/* Setup the return address for a dummy frame, as called by
|
/* Setup the return address for a dummy frame, as called by
|
call_function_by_hand. Only necessary when you are using an empty
|
call_function_by_hand. Only necessary when you are using an empty
|
CALL_DUMMY. */
|
CALL_DUMMY. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
|
avr_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
|
{
|
{
|
unsigned char buf[2];
|
unsigned char buf[2];
|
int wordsize = 2;
|
int wordsize = 2;
|
#if 0
|
#if 0
|
struct minimal_symbol *msymbol;
|
struct minimal_symbol *msymbol;
|
CORE_ADDR mon_brk;
|
CORE_ADDR mon_brk;
|
#endif
|
#endif
|
|
|
buf[0] = 0;
|
buf[0] = 0;
|
buf[1] = 0;
|
buf[1] = 0;
|
sp -= wordsize;
|
sp -= wordsize;
|
write_memory (sp + 1, buf, 2);
|
write_memory (sp + 1, buf, 2);
|
|
|
#if 0
|
#if 0
|
/* FIXME: TRoth/2002-02-18: This should probably be removed since it's a
|
/* FIXME: TRoth/2002-02-18: This should probably be removed since it's a
|
left-over from Denis' original patch which used avr-mon for the target
|
left-over from Denis' original patch which used avr-mon for the target
|
instead of the generic remote target. */
|
instead of the generic remote target. */
|
if ((strcmp (target_shortname, "avr-mon") == 0)
|
if ((strcmp (target_shortname, "avr-mon") == 0)
|
&& (msymbol = lookup_minimal_symbol ("gdb_break", NULL, NULL)))
|
&& (msymbol = lookup_minimal_symbol ("gdb_break", NULL, NULL)))
|
{
|
{
|
mon_brk = SYMBOL_VALUE_ADDRESS (msymbol);
|
mon_brk = SYMBOL_VALUE_ADDRESS (msymbol);
|
store_unsigned_integer (buf, wordsize, mon_brk / 2);
|
store_unsigned_integer (buf, wordsize, mon_brk / 2);
|
sp -= wordsize;
|
sp -= wordsize;
|
write_memory (sp + 1, buf + 1, 1);
|
write_memory (sp + 1, buf + 1, 1);
|
write_memory (sp + 2, buf, 1);
|
write_memory (sp + 2, buf, 1);
|
}
|
}
|
#endif
|
#endif
|
return sp;
|
return sp;
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_skip_prologue (CORE_ADDR pc)
|
avr_skip_prologue (CORE_ADDR pc)
|
{
|
{
|
CORE_ADDR func_addr, func_end;
|
CORE_ADDR func_addr, func_end;
|
struct symtab_and_line sal;
|
struct symtab_and_line sal;
|
|
|
/* See what the symbol table says */
|
/* See what the symbol table says */
|
|
|
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
{
|
{
|
sal = find_pc_line (func_addr, 0);
|
sal = find_pc_line (func_addr, 0);
|
|
|
/* troth/2002-08-05: For some very simple functions, gcc doesn't
|
/* troth/2002-08-05: For some very simple functions, gcc doesn't
|
generate a prologue and the sal.end ends up being the 2-byte ``ret''
|
generate a prologue and the sal.end ends up being the 2-byte ``ret''
|
instruction at the end of the function, but func_end ends up being
|
instruction at the end of the function, but func_end ends up being
|
the address of the first instruction of the _next_ function. By
|
the address of the first instruction of the _next_ function. By
|
adjusting func_end by 2 bytes, we can catch these functions and not
|
adjusting func_end by 2 bytes, we can catch these functions and not
|
return sal.end if it is the ``ret'' instruction. */
|
return sal.end if it is the ``ret'' instruction. */
|
|
|
if (sal.line != 0 && sal.end < (func_end-2))
|
if (sal.line != 0 && sal.end < (func_end-2))
|
return sal.end;
|
return sal.end;
|
}
|
}
|
|
|
/* Either we didn't find the start of this function (nothing we can do),
|
/* Either we didn't find the start of this function (nothing we can do),
|
or there's no line info, or the line after the prologue is after
|
or there's no line info, or the line after the prologue is after
|
the end of the function (there probably isn't a prologue). */
|
the end of the function (there probably isn't a prologue). */
|
|
|
return pc;
|
return pc;
|
}
|
}
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_frame_address (struct frame_info *fi)
|
avr_frame_address (struct frame_info *fi)
|
{
|
{
|
return avr_make_saddr (fi->frame);
|
return avr_make_saddr (fi->frame);
|
}
|
}
|
|
|
/* Given a GDB frame, determine the address of the calling function's frame.
|
/* Given a GDB frame, determine the address of the calling function's frame.
|
This will be used to create a new GDB frame struct, and then
|
This will be used to create a new GDB frame struct, and then
|
INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
|
INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
|
|
|
For us, the frame address is its stack pointer value, so we look up
|
For us, the frame address is its stack pointer value, so we look up
|
the function prologue to determine the caller's sp value, and return it. */
|
the function prologue to determine the caller's sp value, and return it. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_frame_chain (struct frame_info *frame)
|
avr_frame_chain (struct frame_info *frame)
|
{
|
{
|
if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
|
if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
|
{
|
{
|
/* initialize the return_pc now */
|
/* initialize the return_pc now */
|
frame->extra_info->return_pc = generic_read_register_dummy (frame->pc,
|
frame->extra_info->return_pc = generic_read_register_dummy (frame->pc,
|
frame->
|
frame->
|
frame,
|
frame,
|
AVR_PC_REGNUM);
|
AVR_PC_REGNUM);
|
return frame->frame;
|
return frame->frame;
|
}
|
}
|
return (frame->extra_info->is_main ? 0
|
return (frame->extra_info->is_main ? 0
|
: frame->frame + frame->extra_info->framesize + 2 /* ret addr */ );
|
: frame->frame + frame->extra_info->framesize + 2 /* ret addr */ );
|
}
|
}
|
|
|
/* Store the address of the place in which to copy the structure the
|
/* Store the address of the place in which to copy the structure the
|
subroutine will return. This is called from call_function.
|
subroutine will return. This is called from call_function.
|
|
|
We store structs through a pointer passed in the first Argument
|
We store structs through a pointer passed in the first Argument
|
register. */
|
register. */
|
|
|
static void
|
static void
|
avr_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
|
avr_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
|
{
|
{
|
write_register (0, addr);
|
write_register (0, addr);
|
}
|
}
|
|
|
/* Extract from an array REGBUF containing the (raw) register state
|
/* Extract from an array REGBUF containing the (raw) register state
|
the address in which a function should return its structure value,
|
the address in which a function should return its structure value,
|
as a CORE_ADDR (or an expression that can be used as one). */
|
as a CORE_ADDR (or an expression that can be used as one). */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_extract_struct_value_address (char *regbuf)
|
avr_extract_struct_value_address (char *regbuf)
|
{
|
{
|
return (extract_address ((regbuf) + REGISTER_BYTE (0),
|
return (extract_address ((regbuf) + REGISTER_BYTE (0),
|
REGISTER_RAW_SIZE (0)) | AVR_SMEM_START);
|
REGISTER_RAW_SIZE (0)) | AVR_SMEM_START);
|
}
|
}
|
|
|
/* Setup the function arguments for calling a function in the inferior.
|
/* Setup the function arguments for calling a function in the inferior.
|
|
|
On the AVR architecture, there are 18 registers (R25 to R8) which are
|
On the AVR architecture, there are 18 registers (R25 to R8) which are
|
dedicated for passing function arguments. Up to the first 18 arguments
|
dedicated for passing function arguments. Up to the first 18 arguments
|
(depending on size) may go into these registers. The rest go on the stack.
|
(depending on size) may go into these registers. The rest go on the stack.
|
|
|
Arguments that are larger than WORDSIZE bytes will be split between two or
|
Arguments that are larger than WORDSIZE bytes will be split between two or
|
more registers as available, but will NOT be split between a register and
|
more registers as available, but will NOT be split between a register and
|
the stack.
|
the stack.
|
|
|
An exceptional case exists for struct arguments (and possibly other
|
An exceptional case exists for struct arguments (and possibly other
|
aggregates such as arrays) -- if the size is larger than WORDSIZE bytes but
|
aggregates such as arrays) -- if the size is larger than WORDSIZE bytes but
|
not a multiple of WORDSIZE bytes. In this case the argument is never split
|
not a multiple of WORDSIZE bytes. In this case the argument is never split
|
between the registers and the stack, but instead is copied in its entirety
|
between the registers and the stack, but instead is copied in its entirety
|
onto the stack, AND also copied into as many registers as there is room
|
onto the stack, AND also copied into as many registers as there is room
|
for. In other words, space in registers permitting, two copies of the same
|
for. In other words, space in registers permitting, two copies of the same
|
argument are passed in. As far as I can tell, only the one on the stack is
|
argument are passed in. As far as I can tell, only the one on the stack is
|
used, although that may be a function of the level of compiler
|
used, although that may be a function of the level of compiler
|
optimization. I suspect this is a compiler bug. Arguments of these odd
|
optimization. I suspect this is a compiler bug. Arguments of these odd
|
sizes are left-justified within the word (as opposed to arguments smaller
|
sizes are left-justified within the word (as opposed to arguments smaller
|
than WORDSIZE bytes, which are right-justified).
|
than WORDSIZE bytes, which are right-justified).
|
|
|
If the function is to return an aggregate type such as a struct, the caller
|
If the function is to return an aggregate type such as a struct, the caller
|
must allocate space into which the callee will copy the return value. In
|
must allocate space into which the callee will copy the return value. In
|
this case, a pointer to the return value location is passed into the callee
|
this case, a pointer to the return value location is passed into the callee
|
in register R0, which displaces one of the other arguments passed in via
|
in register R0, which displaces one of the other arguments passed in via
|
registers R0 to R2. */
|
registers R0 to R2. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
avr_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
|
avr_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
|
int struct_return, CORE_ADDR struct_addr)
|
int struct_return, CORE_ADDR struct_addr)
|
{
|
{
|
int stack_alloc, stack_offset;
|
int stack_alloc, stack_offset;
|
int wordsize;
|
int wordsize;
|
int argreg;
|
int argreg;
|
int argnum;
|
int argnum;
|
struct type *type;
|
struct type *type;
|
CORE_ADDR regval;
|
CORE_ADDR regval;
|
char *val;
|
char *val;
|
char valbuf[4];
|
char valbuf[4];
|
int len;
|
int len;
|
|
|
wordsize = 1;
|
wordsize = 1;
|
#if 0
|
#if 0
|
/* Now make sure there's space on the stack */
|
/* Now make sure there's space on the stack */
|
for (argnum = 0, stack_alloc = 0; argnum < nargs; argnum++)
|
for (argnum = 0, stack_alloc = 0; argnum < nargs; argnum++)
|
stack_alloc += TYPE_LENGTH (VALUE_TYPE (args[argnum]));
|
stack_alloc += TYPE_LENGTH (VALUE_TYPE (args[argnum]));
|
sp -= stack_alloc; /* make room on stack for args */
|
sp -= stack_alloc; /* make room on stack for args */
|
/* we may over-allocate a little here, but that won't hurt anything */
|
/* we may over-allocate a little here, but that won't hurt anything */
|
#endif
|
#endif
|
argreg = 25;
|
argreg = 25;
|
if (struct_return) /* "struct return" pointer takes up one argreg */
|
if (struct_return) /* "struct return" pointer takes up one argreg */
|
{
|
{
|
write_register (--argreg, struct_addr);
|
write_register (--argreg, struct_addr);
|
}
|
}
|
|
|
/* Now load as many as possible of the first arguments into registers, and
|
/* Now load as many as possible of the first arguments into registers, and
|
push the rest onto the stack. There are 3N bytes in three registers
|
push the rest onto the stack. There are 3N bytes in three registers
|
available. Loop thru args from first to last. */
|
available. Loop thru args from first to last. */
|
|
|
for (argnum = 0, stack_offset = 0; argnum < nargs; argnum++)
|
for (argnum = 0, stack_offset = 0; argnum < nargs; argnum++)
|
{
|
{
|
type = VALUE_TYPE (args[argnum]);
|
type = VALUE_TYPE (args[argnum]);
|
len = TYPE_LENGTH (type);
|
len = TYPE_LENGTH (type);
|
val = (char *) VALUE_CONTENTS (args[argnum]);
|
val = (char *) VALUE_CONTENTS (args[argnum]);
|
|
|
/* NOTE WELL!!!!! This is not an "else if" clause!!! That's because
|
/* NOTE WELL!!!!! This is not an "else if" clause!!! That's because
|
some *&^%$ things get passed on the stack AND in the registers! */
|
some *&^%$ things get passed on the stack AND in the registers! */
|
while (len > 0)
|
while (len > 0)
|
{ /* there's room in registers */
|
{ /* there's room in registers */
|
len -= wordsize;
|
len -= wordsize;
|
regval = extract_address (val + len, wordsize);
|
regval = extract_address (val + len, wordsize);
|
write_register (argreg--, regval);
|
write_register (argreg--, regval);
|
}
|
}
|
}
|
}
|
return sp;
|
return sp;
|
}
|
}
|
|
|
/* Initialize the gdbarch structure for the AVR's. */
|
/* Initialize the gdbarch structure for the AVR's. */
|
|
|
static struct gdbarch *
|
static struct gdbarch *
|
avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
{
|
{
|
/* FIXME: TRoth/2002-02-18: I have no idea if avr_call_dummy_words[] should
|
/* FIXME: TRoth/2002-02-18: I have no idea if avr_call_dummy_words[] should
|
be bigger or not. Initial testing seems to show that `call my_func()`
|
be bigger or not. Initial testing seems to show that `call my_func()`
|
works and backtrace from a breakpoint within the call looks correct.
|
works and backtrace from a breakpoint within the call looks correct.
|
Admittedly, I haven't tested with more than a very simple program. */
|
Admittedly, I haven't tested with more than a very simple program. */
|
static LONGEST avr_call_dummy_words[] = { 0 };
|
static LONGEST avr_call_dummy_words[] = { 0 };
|
|
|
struct gdbarch *gdbarch;
|
struct gdbarch *gdbarch;
|
struct gdbarch_tdep *tdep;
|
struct gdbarch_tdep *tdep;
|
|
|
/* Find a candidate among the list of pre-declared architectures. */
|
/* Find a candidate among the list of pre-declared architectures. */
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
if (arches != NULL)
|
if (arches != NULL)
|
return arches->gdbarch;
|
return arches->gdbarch;
|
|
|
/* None found, create a new architecture from the information provided. */
|
/* None found, create a new architecture from the information provided. */
|
tdep = XMALLOC (struct gdbarch_tdep);
|
tdep = XMALLOC (struct gdbarch_tdep);
|
gdbarch = gdbarch_alloc (&info, tdep);
|
gdbarch = gdbarch_alloc (&info, tdep);
|
|
|
/* If we ever need to differentiate the device types, do it here. */
|
/* If we ever need to differentiate the device types, do it here. */
|
switch (info.bfd_arch_info->mach)
|
switch (info.bfd_arch_info->mach)
|
{
|
{
|
case bfd_mach_avr1:
|
case bfd_mach_avr1:
|
case bfd_mach_avr2:
|
case bfd_mach_avr2:
|
case bfd_mach_avr3:
|
case bfd_mach_avr3:
|
case bfd_mach_avr4:
|
case bfd_mach_avr4:
|
case bfd_mach_avr5:
|
case bfd_mach_avr5:
|
break;
|
break;
|
}
|
}
|
|
|
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
set_gdbarch_addr_bit (gdbarch, 32);
|
set_gdbarch_addr_bit (gdbarch, 32);
|
set_gdbarch_bfd_vma_bit (gdbarch, 32); /* FIXME: TRoth/2002-02-18: Is this needed? */
|
set_gdbarch_bfd_vma_bit (gdbarch, 32); /* FIXME: TRoth/2002-02-18: Is this needed? */
|
|
|
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_long_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
set_gdbarch_long_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
|
|
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
|
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
|
set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_little);
|
set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_little);
|
set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_single_little);
|
set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_single_little);
|
|
|
set_gdbarch_read_pc (gdbarch, avr_read_pc);
|
set_gdbarch_read_pc (gdbarch, avr_read_pc);
|
set_gdbarch_write_pc (gdbarch, avr_write_pc);
|
set_gdbarch_write_pc (gdbarch, avr_write_pc);
|
set_gdbarch_read_fp (gdbarch, avr_read_fp);
|
set_gdbarch_read_fp (gdbarch, avr_read_fp);
|
set_gdbarch_read_sp (gdbarch, avr_read_sp);
|
set_gdbarch_read_sp (gdbarch, avr_read_sp);
|
set_gdbarch_write_sp (gdbarch, avr_write_sp);
|
set_gdbarch_write_sp (gdbarch, avr_write_sp);
|
|
|
set_gdbarch_num_regs (gdbarch, AVR_NUM_REGS);
|
set_gdbarch_num_regs (gdbarch, AVR_NUM_REGS);
|
|
|
set_gdbarch_sp_regnum (gdbarch, AVR_SP_REGNUM);
|
set_gdbarch_sp_regnum (gdbarch, AVR_SP_REGNUM);
|
set_gdbarch_fp_regnum (gdbarch, AVR_FP_REGNUM);
|
set_gdbarch_fp_regnum (gdbarch, AVR_FP_REGNUM);
|
set_gdbarch_pc_regnum (gdbarch, AVR_PC_REGNUM);
|
set_gdbarch_pc_regnum (gdbarch, AVR_PC_REGNUM);
|
|
|
set_gdbarch_register_name (gdbarch, avr_register_name);
|
set_gdbarch_register_name (gdbarch, avr_register_name);
|
set_gdbarch_register_size (gdbarch, 1);
|
set_gdbarch_register_size (gdbarch, 1);
|
set_gdbarch_register_bytes (gdbarch, AVR_NUM_REG_BYTES);
|
set_gdbarch_register_bytes (gdbarch, AVR_NUM_REG_BYTES);
|
set_gdbarch_register_byte (gdbarch, avr_register_byte);
|
set_gdbarch_register_byte (gdbarch, avr_register_byte);
|
set_gdbarch_register_raw_size (gdbarch, avr_register_raw_size);
|
set_gdbarch_register_raw_size (gdbarch, avr_register_raw_size);
|
set_gdbarch_max_register_raw_size (gdbarch, 4);
|
set_gdbarch_max_register_raw_size (gdbarch, 4);
|
set_gdbarch_register_virtual_size (gdbarch, avr_register_virtual_size);
|
set_gdbarch_register_virtual_size (gdbarch, avr_register_virtual_size);
|
set_gdbarch_max_register_virtual_size (gdbarch, 4);
|
set_gdbarch_max_register_virtual_size (gdbarch, 4);
|
set_gdbarch_register_virtual_type (gdbarch, avr_register_virtual_type);
|
set_gdbarch_register_virtual_type (gdbarch, avr_register_virtual_type);
|
|
|
set_gdbarch_get_saved_register (gdbarch, generic_unwind_get_saved_register);
|
set_gdbarch_get_saved_register (gdbarch, generic_unwind_get_saved_register);
|
|
|
set_gdbarch_print_insn (gdbarch, print_insn_avr);
|
set_gdbarch_print_insn (gdbarch, print_insn_avr);
|
|
|
set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
|
set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
|
set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
|
set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
|
set_gdbarch_call_dummy_address (gdbarch, avr_call_dummy_address);
|
set_gdbarch_call_dummy_address (gdbarch, avr_call_dummy_address);
|
set_gdbarch_call_dummy_start_offset (gdbarch, 0);
|
set_gdbarch_call_dummy_start_offset (gdbarch, 0);
|
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
|
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
|
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
|
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
|
set_gdbarch_call_dummy_length (gdbarch, 0);
|
set_gdbarch_call_dummy_length (gdbarch, 0);
|
set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
|
set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
|
set_gdbarch_call_dummy_p (gdbarch, 1);
|
set_gdbarch_call_dummy_p (gdbarch, 1);
|
set_gdbarch_call_dummy_words (gdbarch, avr_call_dummy_words);
|
set_gdbarch_call_dummy_words (gdbarch, avr_call_dummy_words);
|
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
|
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
|
set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
|
set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
|
|
|
/* set_gdbarch_believe_pcc_promotion (gdbarch, 1); // TRoth: should this be set? */
|
/* set_gdbarch_believe_pcc_promotion (gdbarch, 1); // TRoth: should this be set? */
|
|
|
set_gdbarch_address_to_pointer (gdbarch, avr_address_to_pointer);
|
set_gdbarch_address_to_pointer (gdbarch, avr_address_to_pointer);
|
set_gdbarch_pointer_to_address (gdbarch, avr_pointer_to_address);
|
set_gdbarch_pointer_to_address (gdbarch, avr_pointer_to_address);
|
set_gdbarch_deprecated_extract_return_value (gdbarch, avr_extract_return_value);
|
set_gdbarch_deprecated_extract_return_value (gdbarch, avr_extract_return_value);
|
set_gdbarch_push_arguments (gdbarch, avr_push_arguments);
|
set_gdbarch_push_arguments (gdbarch, avr_push_arguments);
|
set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
|
set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
|
set_gdbarch_push_return_address (gdbarch, avr_push_return_address);
|
set_gdbarch_push_return_address (gdbarch, avr_push_return_address);
|
set_gdbarch_pop_frame (gdbarch, avr_pop_frame);
|
set_gdbarch_pop_frame (gdbarch, avr_pop_frame);
|
|
|
set_gdbarch_deprecated_store_return_value (gdbarch, avr_store_return_value);
|
set_gdbarch_deprecated_store_return_value (gdbarch, avr_store_return_value);
|
|
|
set_gdbarch_use_struct_convention (gdbarch, generic_use_struct_convention);
|
set_gdbarch_use_struct_convention (gdbarch, generic_use_struct_convention);
|
set_gdbarch_store_struct_return (gdbarch, avr_store_struct_return);
|
set_gdbarch_store_struct_return (gdbarch, avr_store_struct_return);
|
set_gdbarch_deprecated_extract_struct_value_address
|
set_gdbarch_deprecated_extract_struct_value_address
|
(gdbarch, avr_extract_struct_value_address);
|
(gdbarch, avr_extract_struct_value_address);
|
|
|
set_gdbarch_frame_init_saved_regs (gdbarch, avr_scan_prologue);
|
set_gdbarch_frame_init_saved_regs (gdbarch, avr_scan_prologue);
|
set_gdbarch_init_extra_frame_info (gdbarch, avr_init_extra_frame_info);
|
set_gdbarch_init_extra_frame_info (gdbarch, avr_init_extra_frame_info);
|
set_gdbarch_skip_prologue (gdbarch, avr_skip_prologue);
|
set_gdbarch_skip_prologue (gdbarch, avr_skip_prologue);
|
/* set_gdbarch_prologue_frameless_p (gdbarch, avr_prologue_frameless_p); */
|
/* set_gdbarch_prologue_frameless_p (gdbarch, avr_prologue_frameless_p); */
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
|
|
set_gdbarch_decr_pc_after_break (gdbarch, 0);
|
set_gdbarch_decr_pc_after_break (gdbarch, 0);
|
|
|
set_gdbarch_function_start_offset (gdbarch, 0);
|
set_gdbarch_function_start_offset (gdbarch, 0);
|
set_gdbarch_remote_translate_xfer_address (gdbarch,
|
set_gdbarch_remote_translate_xfer_address (gdbarch,
|
avr_remote_translate_xfer_address);
|
avr_remote_translate_xfer_address);
|
set_gdbarch_frame_args_skip (gdbarch, 0);
|
set_gdbarch_frame_args_skip (gdbarch, 0);
|
set_gdbarch_frameless_function_invocation (gdbarch, frameless_look_for_prologue); /* ??? */
|
set_gdbarch_frameless_function_invocation (gdbarch, frameless_look_for_prologue); /* ??? */
|
set_gdbarch_frame_chain (gdbarch, avr_frame_chain);
|
set_gdbarch_frame_chain (gdbarch, avr_frame_chain);
|
set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid);
|
set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid);
|
set_gdbarch_frame_saved_pc (gdbarch, avr_frame_saved_pc);
|
set_gdbarch_frame_saved_pc (gdbarch, avr_frame_saved_pc);
|
set_gdbarch_frame_args_address (gdbarch, avr_frame_address);
|
set_gdbarch_frame_args_address (gdbarch, avr_frame_address);
|
set_gdbarch_frame_locals_address (gdbarch, avr_frame_address);
|
set_gdbarch_frame_locals_address (gdbarch, avr_frame_address);
|
set_gdbarch_saved_pc_after_call (gdbarch, avr_saved_pc_after_call);
|
set_gdbarch_saved_pc_after_call (gdbarch, avr_saved_pc_after_call);
|
set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
|
set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
|
|
|
set_gdbarch_convert_from_func_ptr_addr (gdbarch,
|
set_gdbarch_convert_from_func_ptr_addr (gdbarch,
|
avr_convert_from_func_ptr_addr);
|
avr_convert_from_func_ptr_addr);
|
|
|
return gdbarch;
|
return gdbarch;
|
}
|
}
|
|
|
/* Send a query request to the avr remote target asking for values of the io
|
/* Send a query request to the avr remote target asking for values of the io
|
registers. If args parameter is not NULL, then the user has requested info
|
registers. If args parameter is not NULL, then the user has requested info
|
on a specific io register [This still needs implemented and is ignored for
|
on a specific io register [This still needs implemented and is ignored for
|
now]. The query string should be one of these forms:
|
now]. The query string should be one of these forms:
|
|
|
"Ravr.io_reg" -> reply is "NN" number of io registers
|
"Ravr.io_reg" -> reply is "NN" number of io registers
|
|
|
"Ravr.io_reg:addr,len" where addr is first register and len is number of
|
"Ravr.io_reg:addr,len" where addr is first register and len is number of
|
registers to be read. The reply should be "<NAME>,VV;" for each io register
|
registers to be read. The reply should be "<NAME>,VV;" for each io register
|
where, <NAME> is a string, and VV is the hex value of the register.
|
where, <NAME> is a string, and VV is the hex value of the register.
|
|
|
All io registers are 8-bit. */
|
All io registers are 8-bit. */
|
|
|
static void
|
static void
|
avr_io_reg_read_command (char *args, int from_tty)
|
avr_io_reg_read_command (char *args, int from_tty)
|
{
|
{
|
int bufsiz = 0;
|
int bufsiz = 0;
|
char buf[400];
|
char buf[400];
|
char query[400];
|
char query[400];
|
char *p;
|
char *p;
|
unsigned int nreg = 0;
|
unsigned int nreg = 0;
|
unsigned int val;
|
unsigned int val;
|
int i, j, k, step;
|
int i, j, k, step;
|
|
|
/* fprintf_unfiltered (gdb_stderr, "DEBUG: avr_io_reg_read_command (\"%s\", %d)\n", */
|
/* fprintf_unfiltered (gdb_stderr, "DEBUG: avr_io_reg_read_command (\"%s\", %d)\n", */
|
/* args, from_tty); */
|
/* args, from_tty); */
|
|
|
if (!current_target.to_query)
|
if (!current_target.to_query)
|
{
|
{
|
fprintf_unfiltered (gdb_stderr,
|
fprintf_unfiltered (gdb_stderr,
|
"ERR: info io_registers NOT supported by current target\n");
|
"ERR: info io_registers NOT supported by current target\n");
|
return;
|
return;
|
}
|
}
|
|
|
/* Just get the maximum buffer size. */
|
/* Just get the maximum buffer size. */
|
target_query ((int) 'R', 0, 0, &bufsiz);
|
target_query ((int) 'R', 0, 0, &bufsiz);
|
if (bufsiz > sizeof (buf))
|
if (bufsiz > sizeof (buf))
|
bufsiz = sizeof (buf);
|
bufsiz = sizeof (buf);
|
|
|
/* Find out how many io registers the target has. */
|
/* Find out how many io registers the target has. */
|
strcpy (query, "avr.io_reg");
|
strcpy (query, "avr.io_reg");
|
target_query ((int) 'R', query, buf, &bufsiz);
|
target_query ((int) 'R', query, buf, &bufsiz);
|
|
|
if (strncmp (buf, "", bufsiz) == 0)
|
if (strncmp (buf, "", bufsiz) == 0)
|
{
|
{
|
fprintf_unfiltered (gdb_stderr,
|
fprintf_unfiltered (gdb_stderr,
|
"info io_registers NOT supported by target\n");
|
"info io_registers NOT supported by target\n");
|
return;
|
return;
|
}
|
}
|
|
|
if (sscanf (buf, "%x", &nreg) != 1)
|
if (sscanf (buf, "%x", &nreg) != 1)
|
{
|
{
|
fprintf_unfiltered (gdb_stderr,
|
fprintf_unfiltered (gdb_stderr,
|
"Error fetching number of io registers\n");
|
"Error fetching number of io registers\n");
|
return;
|
return;
|
}
|
}
|
|
|
reinitialize_more_filter ();
|
reinitialize_more_filter ();
|
|
|
printf_unfiltered ("Target has %u io registers:\n\n", nreg);
|
printf_unfiltered ("Target has %u io registers:\n\n", nreg);
|
|
|
/* only fetch up to 8 registers at a time to keep the buffer small */
|
/* only fetch up to 8 registers at a time to keep the buffer small */
|
step = 8;
|
step = 8;
|
|
|
for (i = 0; i < nreg; i += step)
|
for (i = 0; i < nreg; i += step)
|
{
|
{
|
j = step - (nreg % step); /* how many registers this round? */
|
j = step - (nreg % step); /* how many registers this round? */
|
|
|
snprintf (query, sizeof (query) - 1, "avr.io_reg:%x,%x", i, j);
|
snprintf (query, sizeof (query) - 1, "avr.io_reg:%x,%x", i, j);
|
target_query ((int) 'R', query, buf, &bufsiz);
|
target_query ((int) 'R', query, buf, &bufsiz);
|
|
|
p = buf;
|
p = buf;
|
for (k = i; k < (i + j); k++)
|
for (k = i; k < (i + j); k++)
|
{
|
{
|
if (sscanf (p, "%[^,],%x;", query, &val) == 2)
|
if (sscanf (p, "%[^,],%x;", query, &val) == 2)
|
{
|
{
|
printf_filtered ("[%02x] %-15s : %02x\n", k, query, val);
|
printf_filtered ("[%02x] %-15s : %02x\n", k, query, val);
|
while ((*p != ';') && (*p != '\0'))
|
while ((*p != ';') && (*p != '\0'))
|
p++;
|
p++;
|
p++; /* skip over ';' */
|
p++; /* skip over ';' */
|
if (*p == '\0')
|
if (*p == '\0')
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
void
|
void
|
_initialize_avr_tdep (void)
|
_initialize_avr_tdep (void)
|
{
|
{
|
register_gdbarch_init (bfd_arch_avr, avr_gdbarch_init);
|
register_gdbarch_init (bfd_arch_avr, avr_gdbarch_init);
|
|
|
/* Add a new command to allow the user to query the avr remote target for
|
/* Add a new command to allow the user to query the avr remote target for
|
the values of the io space registers in a saner way than just using
|
the values of the io space registers in a saner way than just using
|
`x/NNNb ADDR`. */
|
`x/NNNb ADDR`. */
|
|
|
/* FIXME: TRoth/2002-02-18: This should probably be changed to 'info avr
|
/* FIXME: TRoth/2002-02-18: This should probably be changed to 'info avr
|
io_registers' to signify it is not available on other platforms. */
|
io_registers' to signify it is not available on other platforms. */
|
|
|
add_cmd ("io_registers", class_info, avr_io_reg_read_command,
|
add_cmd ("io_registers", class_info, avr_io_reg_read_command,
|
"query remote avr target for io space register values", &infolist);
|
"query remote avr target for io space register values", &infolist);
|
}
|
}
|
|
|
