#endif
#include "armv4_5.h"
+#include "arm_jtag.h"
#include "breakpoints.h"
#include "arm_disassembler.h"
#include "binarybuffer.h"
"cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und"
};
-char * armv4_5_mode_strings_list[] =
+static const char *armv4_5_mode_strings_list[] =
{
"Illegal mode value", "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System"
};
/* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
-char** armv4_5_mode_strings = armv4_5_mode_strings_list + 1;
+const char **armv4_5_mode_strings = armv4_5_mode_strings_list + 1;
+
+/** Map PSR mode bits to linear number */
+int armv4_5_mode_to_number(enum armv4_5_mode mode)
+{
+ switch (mode) {
+ case ARMV4_5_MODE_ANY:
+ /* map MODE_ANY to user mode */
+ case ARMV4_5_MODE_USR:
+ return 0;
+ case ARMV4_5_MODE_FIQ:
+ return 1;
+ case ARMV4_5_MODE_IRQ:
+ return 2;
+ case ARMV4_5_MODE_SVC:
+ return 3;
+ case ARMV4_5_MODE_ABT:
+ return 4;
+ case ARMV4_5_MODE_UND:
+ return 5;
+ case ARMV4_5_MODE_SYS:
+ return 6;
+ default:
+ LOG_ERROR("invalid mode value encountered %d", mode);
+ return -1;
+ }
+}
+
+/** Map linear number to PSR mode bits. */
+enum armv4_5_mode armv4_5_number_to_mode(int number)
+{
+ switch (number) {
+ case 0:
+ return ARMV4_5_MODE_USR;
+ case 1:
+ return ARMV4_5_MODE_FIQ;
+ case 2:
+ return ARMV4_5_MODE_IRQ;
+ case 3:
+ return ARMV4_5_MODE_SVC;
+ case 4:
+ return ARMV4_5_MODE_ABT;
+ case 5:
+ return ARMV4_5_MODE_UND;
+ case 6:
+ return ARMV4_5_MODE_SYS;
+ default:
+ LOG_ERROR("mode index out of bounds %d", number);
+ return ARMV4_5_MODE_ANY;
+ }
+}
char* armv4_5_state_strings[] =
{
"ARM", "Thumb", "Jazelle"
};
-int armv4_5_core_reg_arch_type = -1;
-
struct armv4_5_core_reg armv4_5_core_reg_list_arch_info[] =
{
{0, ARMV4_5_MODE_ANY, NULL, NULL},
}
};
-uint8_t armv4_5_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+static const uint8_t arm_gdb_dummy_fp_value[12];
-struct reg armv4_5_gdb_dummy_fp_reg =
+/**
+ * Dummy FPA registers are required to support GDB on ARM.
+ * Register packets require eight obsolete FPA register values.
+ * Modern ARM cores use Vector Floating Point (VFP), if they
+ * have any floating point support. VFP is not FPA-compatible.
+ */
+struct reg arm_gdb_dummy_fp_reg =
{
- .name = "GDB dummy floating-point register",
- .value = armv4_5_gdb_dummy_fp_value,
- .dirty = 0,
+ .name = "GDB dummy FPA register",
+ .value = (uint8_t *) arm_gdb_dummy_fp_value,
.valid = 1,
.size = 96,
- .arch_info = NULL,
- .arch_type = 0,
};
-uint8_t armv4_5_gdb_dummy_fps_value[] = {0, 0, 0, 0};
+static const uint8_t arm_gdb_dummy_fps_value[4];
-struct reg armv4_5_gdb_dummy_fps_reg =
+/**
+ * Dummy FPA status registers are required to support GDB on ARM.
+ * Register packets require an obsolete FPA status register.
+ */
+struct reg arm_gdb_dummy_fps_reg =
{
- .name = "GDB dummy floating-point status register",
- .value = armv4_5_gdb_dummy_fps_value,
- .dirty = 0,
+ .name = "GDB dummy FPA status register",
+ .value = (uint8_t *) arm_gdb_dummy_fps_value,
.valid = 1,
.size = 32,
- .arch_info = NULL,
- .arch_type = 0,
};
+static void arm_gdb_dummy_init(void) __attribute__ ((constructor));
+
+static void arm_gdb_dummy_init(void)
+{
+ register_init_dummy(&arm_gdb_dummy_fp_reg);
+ register_init_dummy(&arm_gdb_dummy_fps_reg);
+}
+
int armv4_5_get_core_reg(struct reg *reg)
{
int retval;
return ERROR_OK;
}
+static const struct reg_arch_type arm_reg_type = {
+ .get = armv4_5_get_core_reg,
+ .set = armv4_5_set_core_reg,
+};
+
int armv4_5_invalidate_core_regs(struct target *target)
{
struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
cache->reg_list = reg_list;
cache->num_regs = num_regs;
- if (armv4_5_core_reg_arch_type == -1)
- armv4_5_core_reg_arch_type = register_reg_arch_type(armv4_5_get_core_reg, armv4_5_set_core_reg);
-
- register_init_dummy(&armv4_5_gdb_dummy_fp_reg);
- register_init_dummy(&armv4_5_gdb_dummy_fps_reg);
-
for (i = 0; i < 37; i++)
{
arch_info[i] = armv4_5_core_reg_list_arch_info[i];
reg_list[i].value = calloc(1, 4);
reg_list[i].dirty = 0;
reg_list[i].valid = 0;
- reg_list[i].arch_type = armv4_5_core_reg_arch_type;
+ reg_list[i].type = &arm_reg_type;
reg_list[i].arch_info = &arch_info[i];
}
if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
{
LOG_ERROR("BUG: called for a non-ARMv4/5 target");
- exit(-1);
+ return ERROR_FAIL;
}
LOG_USER("target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "",
char output[128];
int output_len;
int mode, num;
- struct target *target = get_current_target(cmd_ctx);
+ struct target *target = get_current_target(CMD_CTX);
struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
+ if (!is_arm(armv4_5))
{
- command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
- return ERROR_OK;
+ command_print(CMD_CTX, "current target isn't an ARM");
+ return ERROR_FAIL;
}
if (target->state != TARGET_HALTED)
{
- command_print(cmd_ctx, "error: target must be halted for register accesses");
+ command_print(CMD_CTX, "error: target must be halted for register accesses");
return ERROR_OK;
}
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
+ if (!armv4_5->full_context) {
+ command_print(CMD_CTX, "error: target doesn't support %s",
+ CMD_NAME);
+ return ERROR_FAIL;
+ }
+
for (num = 0; num <= 15; num++)
{
output_len = 0;
ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).name,
buf_get_u32(ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).value, 0, 32));
}
- command_print(cmd_ctx, "%s", output);
+ command_print(CMD_CTX, "%s", output);
}
- command_print(cmd_ctx,
+ command_print(CMD_CTX,
" cpsr: %8.8" PRIx32 " spsr_fiq: %8.8" PRIx32 " spsr_irq: %8.8" PRIx32 " spsr_svc: %8.8" PRIx32 " spsr_abt: %8.8" PRIx32 " spsr_und: %8.8" PRIx32 "",
buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_FIQ].value, 0, 32),
COMMAND_HANDLER(handle_armv4_5_core_state_command)
{
- struct target *target = get_current_target(cmd_ctx);
+ struct target *target = get_current_target(CMD_CTX);
struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
+ if (!is_arm(armv4_5))
{
- command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
- return ERROR_OK;
+ command_print(CMD_CTX, "current target isn't an ARM");
+ return ERROR_FAIL;
}
- if (argc > 0)
+ if (CMD_ARGC > 0)
{
- if (strcmp(args[0], "arm") == 0)
+ if (strcmp(CMD_ARGV[0], "arm") == 0)
{
armv4_5->core_state = ARMV4_5_STATE_ARM;
}
- if (strcmp(args[0], "thumb") == 0)
+ if (strcmp(CMD_ARGV[0], "thumb") == 0)
{
armv4_5->core_state = ARMV4_5_STATE_THUMB;
}
}
- command_print(cmd_ctx, "core state: %s", armv4_5_state_strings[armv4_5->core_state]);
+ command_print(CMD_CTX, "core state: %s", armv4_5_state_strings[armv4_5->core_state]);
return ERROR_OK;
}
COMMAND_HANDLER(handle_armv4_5_disassemble_command)
{
int retval = ERROR_OK;
- struct target *target = get_current_target(cmd_ctx);
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ struct target *target = get_current_target(CMD_CTX);
+ struct arm *arm = target ? target_to_arm(target) : NULL;
uint32_t address;
int count = 1;
- int i;
- struct arm_instruction cur_instruction;
- uint32_t opcode;
- uint16_t thumb_opcode;
int thumb = 0;
- 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 (!is_arm(arm)) {
+ command_print(CMD_CTX, "current target isn't an ARM");
+ return ERROR_FAIL;
}
- switch (argc) {
+ switch (CMD_ARGC) {
case 3:
- if (strcmp(args[2], "thumb") != 0)
+ if (strcmp(CMD_ARGV[2], "thumb") != 0)
goto usage;
thumb = 1;
/* FALL THROUGH */
case 2:
- COMMAND_PARSE_NUMBER(int, args[1], count);
+ COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], count);
/* FALL THROUGH */
case 1:
- COMMAND_PARSE_NUMBER(u32, args[0], address);
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
if (address & 0x01) {
if (!thumb) {
- command_print(cmd_ctx, "Disassemble as 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++)
- {
- if (thumb)
- {
- if ((retval = target_read_u16(target, address, &thumb_opcode)) != ERROR_OK)
- {
- return retval;
- }
- if ((retval = thumb_evaluate_opcode(thumb_opcode, address, &cur_instruction)) != ERROR_OK)
- {
- return retval;
- }
+ command_print(CMD_CTX,
+ "usage: arm disassemble <address> [<count> ['thumb']]");
+ count = 0;
+ retval = ERROR_FAIL;
+ }
+
+ while (count-- > 0) {
+ struct arm_instruction cur_instruction;
+
+ if (thumb) {
+ /* Always use Thumb2 disassembly for best handling
+ * of 32-bit BL/BLX, and to work with newer cores
+ * (some ARMv6, all ARMv7) that use Thumb2.
+ */
+ retval = thumb2_opcode(target, address,
+ &cur_instruction);
+ if (retval != ERROR_OK)
+ break;
+ } else {
+ uint32_t opcode;
+
+ retval = target_read_u32(target, address, &opcode);
+ if (retval != ERROR_OK)
+ break;
+ retval = arm_evaluate_opcode(opcode, address,
+ &cur_instruction) != ERROR_OK;
+ if (retval != ERROR_OK)
+ break;
}
- else {
- if ((retval = target_read_u32(target, address, &opcode)) != ERROR_OK)
- {
- return retval;
- }
- if ((retval = arm_evaluate_opcode(opcode, address, &cur_instruction)) != ERROR_OK)
- {
- return retval;
- }
- }
- command_print(cmd_ctx, "%s", cur_instruction.text);
- address += (thumb) ? 2 : 4;
+ command_print(CMD_CTX, "%s", cur_instruction.text);
+ address += cur_instruction.instruction_size;
}
- return ERROR_OK;
+ return retval;
}
int armv4_5_register_commands(struct command_context *cmd_ctx)
{
struct command *armv4_5_cmd;
- armv4_5_cmd = register_command(cmd_ctx, NULL, "armv4_5",
+ armv4_5_cmd = register_command(cmd_ctx, NULL, "arm",
NULL, COMMAND_ANY,
- "armv4/5 specific commands");
+ "generic ARM commands");
register_command(cmd_ctx, armv4_5_cmd, "reg",
handle_armv4_5_reg_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']]");
+ "disassemble instructions "
+ "<address> [<count> ['thumb']]");
return ERROR_OK;
}
for (i = 16; i < 24; i++)
{
- (*reg_list)[i] = &armv4_5_gdb_dummy_fp_reg;
+ (*reg_list)[i] = &arm_gdb_dummy_fp_reg;
}
- (*reg_list)[24] = &armv4_5_gdb_dummy_fps_reg;
+ (*reg_list)[24] = &arm_gdb_dummy_fps_reg;
(*reg_list)[25] = &armv4_5->core_cache->reg_list[ARMV4_5_CPSR];
return ERROR_OK;
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if ((retval = armv4_5_set_core_reg(reg, reg_params[i].value)) != ERROR_OK)
else
{
LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if (armv4_5_algorithm_info->core_mode != ARMV4_5_MODE_ANY)
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
- exit(-1);
+ retval = ERROR_INVALID_ARGUMENTS;
+ continue;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
- exit(-1);
+ retval = ERROR_INVALID_ARGUMENTS;
+ continue;
}
buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
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