/***************************************************************************
* Copyright (C) 2009 by David Brownell *
* *
* 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. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "replacements.h"
#include "armv7a.h"
#include "arm_disassembler.h"
#include "target.h"
#include "register.h"
#include "log.h"
#include "binarybuffer.h"
#include "command.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
bitfield_desc_t armv7a_psr_bitfield_desc[] =
{
{"M[4:0]", 5},
{"T", 1},
{"F", 1},
{"I", 1},
{"A", 1},
{"E", 1},
{"IT[7:2]", 6},
{"GE[3:0]", 4},
{"reserved(DNM)", 4},
{"J", 1},
{"IT[0:1]", 2},
{"Q", 1},
{"V", 1},
{"C", 1},
{"Z", 1},
{"N", 1},
};
char* armv7a_core_reg_list[] =
{
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "r12", "r13_usr", "lr_usr", "pc",
"r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "lr_fiq",
"r13_irq", "lr_irq",
"r13_svc", "lr_svc",
"r13_abt", "lr_abt",
"r13_und", "lr_und",
"cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und",
"r13_mon", "lr_mon", "spsr_mon"
};
char * armv7a_mode_strings_list[] =
{
"Illegal mode value", "User", "FIQ", "IRQ",
"Supervisor", "Abort", "Undefined", "System", "Monitor"
};
/* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
char** armv7a_mode_strings = armv7a_mode_strings_list+1;
char* armv7a_state_strings[] =
{
"ARM", "Thumb", "Jazelle", "ThumbEE"
};
armv7a_core_reg_t armv7a_core_reg_list_arch_info[] =
{
{0, ARMV4_5_MODE_ANY, NULL, NULL},
{1, ARMV4_5_MODE_ANY, NULL, NULL},
{2, ARMV4_5_MODE_ANY, NULL, NULL},
{3, ARMV4_5_MODE_ANY, NULL, NULL},
{4, ARMV4_5_MODE_ANY, NULL, NULL},
{5, ARMV4_5_MODE_ANY, NULL, NULL},
{6, ARMV4_5_MODE_ANY, NULL, NULL},
{7, ARMV4_5_MODE_ANY, NULL, NULL},
{8, ARMV4_5_MODE_ANY, NULL, NULL},
{9, ARMV4_5_MODE_ANY, NULL, NULL},
{10, ARMV4_5_MODE_ANY, NULL, NULL},
{11, ARMV4_5_MODE_ANY, NULL, NULL},
{12, ARMV4_5_MODE_ANY, NULL, NULL},
{13, ARMV4_5_MODE_USR, NULL, NULL},
{14, ARMV4_5_MODE_USR, NULL, NULL},
{15, ARMV4_5_MODE_ANY, NULL, NULL},
{8, ARMV4_5_MODE_FIQ, NULL, NULL},
{9, ARMV4_5_MODE_FIQ, NULL, NULL},
{10, ARMV4_5_MODE_FIQ, NULL, NULL},
{11, ARMV4_5_MODE_FIQ, NULL, NULL},
{12, ARMV4_5_MODE_FIQ, NULL, NULL},
{13, ARMV4_5_MODE_FIQ, NULL, NULL},
{14, ARMV4_5_MODE_FIQ, NULL, NULL},
{13, ARMV4_5_MODE_IRQ, NULL, NULL},
{14, ARMV4_5_MODE_IRQ, NULL, NULL},
{13, ARMV4_5_MODE_SVC, NULL, NULL},
{14, ARMV4_5_MODE_SVC, NULL, NULL},
{13, ARMV4_5_MODE_ABT, NULL, NULL},
{14, ARMV4_5_MODE_ABT, NULL, NULL},
{13, ARMV4_5_MODE_UND, NULL, NULL},
{14, ARMV4_5_MODE_UND, NULL, NULL},
{16, ARMV4_5_MODE_ANY, NULL, NULL},
{16, ARMV4_5_MODE_FIQ, NULL, NULL},
{16, ARMV4_5_MODE_IRQ, NULL, NULL},
{16, ARMV4_5_MODE_SVC, NULL, NULL},
{16, ARMV4_5_MODE_ABT, NULL, NULL},
{16, ARMV4_5_MODE_UND, NULL, NULL},
{13, ARMV7A_MODE_MON, NULL, NULL},
{14, ARMV7A_MODE_MON, NULL, NULL},
{16, ARMV7A_MODE_MON, NULL, NULL}
};
/* map core mode (USR, FIQ, ...) and register number to indizes into the register cache */
int armv7a_core_reg_map[8][17] =
{
{ /* USR */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
},
{ /* FIQ */
0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 15, 32
},
{ /* IRQ */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 15, 33
},
{ /* SVC */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 15, 34
},
{ /* ABT */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 27, 28, 15, 35
},
{ /* UND */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 15, 36
},
{ /* SYS */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
},
{ /* MON */
/* TODO Fix the register mapping for mon, we need r13_mon,
* r14_mon and spsr_mon
*/
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
}
};
uint8_t armv7a_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
reg_t armv7a_gdb_dummy_fp_reg =
{
"GDB dummy floating-point register", armv7a_gdb_dummy_fp_value,
0, 1, 96, NULL, 0, NULL, 0
};
int armv7a_arch_state(struct target_s *target)
{
static const char *state[] =
{
"disabled", "enabled"
};
armv4_5_common_t *armv4_5 = target->arch_info;
armv7a_common_t *armv7a = armv4_5->arch_info;
if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
{
LOG_ERROR("BUG: called for a non-ARMv4/5 target");
exit(-1);
}
LOG_USER("target halted in %s state due to %s, current mode: %s\n"
"%s: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "\n"
"MMU: %s, D-Cache: %s, I-Cache: %s",
armv7a_state_strings[armv7a->core_state],
Jim_Nvp_value2name_simple(nvp_target_debug_reason,
target->debug_reason)->name,
armv7a_mode_strings[
armv7a_mode_to_number(armv4_5->core_mode)],
armv7a_core_reg_list[armv7a_core_reg_map[
armv7a_mode_to_number(armv4_5->core_mode)][16]],
buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
armv4_5->core_mode, 16).value, 0, 32),
buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
state[armv7a->armv4_5_mmu.mmu_enabled],
state[armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
state[armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
return ERROR_OK;
}
static int handle_dap_baseaddr_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;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
return dap_baseaddr_command(cmd_ctx, swjdp, args, argc);
}
static int handle_dap_memaccess_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;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
return dap_memaccess_command(cmd_ctx, swjdp, args, argc);
}
static int handle_dap_apsel_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;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
return dap_apsel_command(cmd_ctx, swjdp, args, argc);
}
static int handle_dap_apid_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;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
return dap_apid_command(cmd_ctx, swjdp, args, argc);
}
static int handle_dap_info_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;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
uint32_t apsel;
apsel = swjdp->apsel;
if (argc > 0)
apsel = strtoul(args[0], NULL, 0);
return dap_info_command(cmd_ctx, swjdp, apsel);
}
static int
handle_armv7a_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;
int thumb = 0;
int count = 1;
uint32_t address;
int i;
if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC) {
command_print(cmd_ctx, "current target isn't an ARM target");
return ERROR_OK;
}
/* REVISIT: eventually support ThumbEE disassembly too;
* some opcodes work differently.
*/
switch (argc) {
case 3:
if (strcmp(args[2], "thumb") != 0)
goto usage;
thumb = 1;
/* FALL THROUGH */
case 2:
count = strtoul(args[1], NULL, 0);
/* FALL THROUGH */
case 1:
address = strtoul(args[0], NULL, 0);
if (address & 0x01) {
if (!thumb) {
command_print(cmd_ctx, "Disassemble as Thumb");
thumb = 1;
}
address &= ~1;
}
break;
default:
usage:
command_print(cmd_ctx,
"usage: armv4_5 disassemble <address> [<count> ['thumb']]");
return ERROR_OK;
}
for (i = 0; i < count; i++) {
arm_instruction_t cur_instruction;
int retval;
if (thumb) {
retval = thumb2_opcode(target, address, &cur_instruction);
if (retval != ERROR_OK)
return retval;
address += cur_instruction.instruction_size;
} else {
uint32_t opcode;
retval = target_read_u32(target, address, &opcode);
if (retval != ERROR_OK)
return retval;
retval = arm_evaluate_opcode(opcode, address,
&cur_instruction);
if (retval != ERROR_OK)
return retval;
address += 4;
}
command_print(cmd_ctx, "%s", cur_instruction.text);
}
return ERROR_OK;
}
int armv7a_register_commands(struct command_context_s *cmd_ctx)
{
command_t *arm_adi_v5_dap_cmd;
command_t *armv7a_cmd;
arm_adi_v5_dap_cmd = register_command(cmd_ctx, NULL, "dap",
NULL, COMMAND_ANY,
"cortex dap specific commands");
register_command(cmd_ctx, arm_adi_v5_dap_cmd, "info",
handle_dap_info_command, COMMAND_EXEC,
"dap info for ap [num], "
"default currently selected AP");
register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apsel",
handle_dap_apsel_command, COMMAND_EXEC,
"select a different AP [num] (default 0)");
register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apid",
handle_dap_apid_command, COMMAND_EXEC,
"return id reg from AP [num], "
"default currently selected AP");
register_command(cmd_ctx, arm_adi_v5_dap_cmd, "baseaddr",
handle_dap_baseaddr_command, COMMAND_EXEC,
"return debug base address from AP [num], "
"default currently selected AP");
register_command(cmd_ctx, arm_adi_v5_dap_cmd, "memaccess",
handle_dap_memaccess_command, COMMAND_EXEC,
"set/get number of extra tck for mem-ap memory "
"bus access [0-255]");
armv7a_cmd = register_command(cmd_ctx, NULL, "armv7a",
NULL, COMMAND_ANY,
"ARMv7-A specific commands");
register_command(cmd_ctx, armv7a_cmd, "disassemble",
handle_armv7a_disassemble_command, COMMAND_EXEC,
"disassemble instructions <address> [<count> ['thumb']]");
return ERROR_OK;
}