Commit b9628acc authored by drath's avatar drath
Browse files

- the 'help' command now takes an optional argument to display help only on a...

- the 'help' command now takes an optional argument to display help only on a certain command (thanks to Andrew Dyer for this enhancement)
- OpenOCD now includes the ability to diassemble instructions on its own (only ARM for now, Thumb might follow). 
The command is "armv4_5 disassemble <address> <count> ['thumb']" (thumb is currently unsupported).
I've compared the produced disassembly against GDB/GNU Objdump output, and it seems to be correct, but there may still be some bugs left.


git-svn-id: svn://svn.berlios.de/openocd/trunk@68 b42882b7-edfa-0310-969c-e2dbd0fdcd60
parent 335f667d
......@@ -443,6 +443,15 @@ int command_print_help(command_context_t* context, char* name, char** args, int
for (c = context->commands; c; c = c->next)
{
if (argc == 1)
{
if (strncasecmp(c->name, args[0], c->unique_len))
continue;
if (strncasecmp(c->name, args[0], strlen(args[0])))
continue;
}
command_print_help_line(context, c, 0);
}
......
......@@ -2,6 +2,7 @@ INCLUDES = -I$(top_srcdir)/src/gdb -I$(top_srcdir)/src/helper -I$(top_srcdir)/s
METASOURCES = AUTO
noinst_LIBRARIES = libtarget.a
libtarget_a_SOURCES = target.c register.c breakpoints.c armv4_5.c embeddedice.c etm.c arm7tdmi.c arm9tdmi.c \
arm_jtag.c arm7_9_common.c algorithm.c arm920t.c arm720t.c armv4_5_mmu.c armv4_5_cache.c
arm_jtag.c arm7_9_common.c algorithm.c arm920t.c arm720t.c armv4_5_mmu.c armv4_5_cache.c arm_disassembler.c
noinst_HEADERS = target.h register.h armv4_5.h embeddedice.h etm.h arm7tdmi.h arm9tdmi.h \
arm_jtag.h arm7_9_common.h arm920t.h arm720t.h armv4_5_mmu.h armv4_5_cache.h breakpoints.h algorithm.h
arm_jtag.h arm7_9_common.h arm920t.h arm720t.h armv4_5_mmu.h armv4_5_cache.h breakpoints.h algorithm.h \
arm_disassembler.h
This diff is collapsed.
/***************************************************************************
* Copyright (C) 2006 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef ARM_DISASSEMBLER_H
#define ARM_DISASSEMBLER_H
#include "types.h"
enum arm_instruction_type
{
ARM_UNKNOWN_INSTUCTION,
/* Branch instructions */
ARM_B,
ARM_BL,
ARM_BX,
ARM_BLX,
/* Data processing instructions */
ARM_AND,
ARM_EOR,
ARM_SUB,
ARM_RSB,
ARM_ADD,
ARM_ADC,
ARM_SBC,
ARM_RSC,
ARM_TST,
ARM_TEQ,
ARM_CMP,
ARM_CMN,
ARM_ORR,
ARM_MOV,
ARM_BIC,
ARM_MVN,
/* Load/store instructions */
ARM_LDR,
ARM_LDRB,
ARM_LDRT,
ARM_LDRBT,
ARM_LDRH,
ARM_LDRSB,
ARM_LDRSH,
ARM_LDM,
ARM_STR,
ARM_STRB,
ARM_STRT,
ARM_STRBT,
ARM_STRH,
ARM_STM,
/* Status register access instructions */
ARM_MRS,
ARM_MSR,
/* Multiply instructions */
ARM_MUL,
ARM_MLA,
ARM_SMULL,
ARM_SMLAL,
ARM_UMULL,
ARM_UMLAL,
/* Miscellaneous instructions */
ARM_CLZ,
/* Exception generating instructions */
ARM_BKPT,
ARM_SWI,
/* Coprocessor instructions */
ARM_CDP,
ARM_LDC,
ARM_STC,
ARM_MCR,
ARM_MRC,
/* Semaphore instructions */
ARM_SWP,
ARM_SWPB,
/* Enhanced DSP extensions */
ARM_MCRR,
ARM_MRRC,
ARM_PLD,
ARM_QADD,
ARM_QDADD,
ARM_QSUB,
ARM_QDSUB,
ARM_SMLAxy,
ARM_SMLALxy,
ARM_SMLAWy,
ARM_SMULxy,
ARM_SMULWy,
ARM_LDRD,
ARM_STRD,
ARM_UNDEFINED_INSTRUCTION = 0xffffffff,
};
typedef struct arm_instruction_s
{
enum arm_instruction_type type;
char text[128];
u32 opcode;
/* target */
u32 target_address;
} arm_instruction_t;
extern int evaluate_opcode(u32 opcode, u32 address, arm_instruction_t *instruction);
#define COND(opcode) (arm_condition_strings[(opcode & 0xf0000000)>>28])
#endif /* ARM_DISASSEMBLER_H */
......@@ -19,6 +19,8 @@
***************************************************************************/
#include "config.h"
#include "arm_disassembler.h"
#include "armv4_5.h"
#include "target.h"
......@@ -377,6 +379,47 @@ int handle_armv4_5_core_state_command(struct command_context_s *cmd_ctx, char *c
return ERROR_OK;
}
int handle_armv4_5_disassemble_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
target_t *target = get_current_target(cmd_ctx);
armv4_5_common_t *armv4_5 = target->arch_info;
u32 address;
int count;
int i;
arm_instruction_t cur_instruction;
u32 opcode;
int thumb;
if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
{
command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
return ERROR_OK;
}
if (argc < 2)
{
command_print(cmd_ctx, "usage: armv4_5 disassemble <address> <count> ['thumb']");
return ERROR_OK;
}
address = strtoul(args[0], NULL, 0);
count = strtoul(args[1], NULL, 0);
if (argc >= 3)
if (strcmp(args[2], "thumb") == 0)
thumb = 1;
for (i = 0; i < count; i++)
{
target->type->read_memory(target, address, 4, 1, (u8*)&opcode);
evaluate_opcode(opcode, address, &cur_instruction);
command_print(cmd_ctx, "%s", cur_instruction.text);
address += (thumb) ? 2 : 4;
}
return ERROR_OK;
}
int armv4_5_register_commands(struct command_context_s *cmd_ctx)
{
command_t *armv4_5_cmd;
......@@ -386,6 +429,7 @@ int armv4_5_register_commands(struct command_context_s *cmd_ctx)
register_command(cmd_ctx, armv4_5_cmd, "reg", handle_armv4_5_reg_command, COMMAND_EXEC, "display ARM core registers");
register_command(cmd_ctx, armv4_5_cmd, "core_state", handle_armv4_5_core_state_command, COMMAND_EXEC, "display/change ARM core state <arm|thumb>");
register_command(cmd_ctx, armv4_5_cmd, "disassemble", handle_armv4_5_disassemble_command, COMMAND_EXEC, "disassemble instructions <address> <count> ['thumb']");
return ERROR_OK;
}
......
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