#include "config.h"
#endif
+#include "breakpoints.h"
#include "armv7m.h"
-
-#define ARRAY_SIZE(x) ((int)(sizeof(x)/sizeof((x)[0])))
+#include "algorithm.h"
+#include "register.h"
#if 0
"DebugMonitor", "RESERVED", "PendSV", "SysTick"
};
-static uint8_t armv7m_gdb_dummy_fp_value[12] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-};
-
-static struct reg armv7m_gdb_dummy_fp_reg =
-{
- "GDB dummy floating-point register", armv7m_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
-};
-
-static uint8_t armv7m_gdb_dummy_fps_value[] = {0, 0, 0, 0};
-
-static struct reg armv7m_gdb_dummy_fps_reg =
-{
- "GDB dummy floating-point status register", armv7m_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0
-};
-
#ifdef ARMV7_GDB_HACKS
uint8_t armv7m_gdb_dummy_cpsr_value[] = {0, 0, 0, 0};
struct reg armv7m_gdb_dummy_cpsr_reg =
{
- "GDB dummy cpsr register", armv7m_gdb_dummy_cpsr_value, 0, 1, 32, NULL, 0, NULL, 0
+ .name = "GDB dummy cpsr register",
+ .value = armv7m_gdb_dummy_cpsr_value,
+ .dirty = 0,
+ .valid = 1,
+ .size = 32,
+ .arch_info = NULL,
};
#endif
#define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs)
-static int armv7m_core_reg_arch_type = -1;
-
/**
* Restores target context using the cache of core registers set up
* by armv7m_build_reg_cache(), calling optional core-specific hooks.
}
}
- if (armv7m->post_restore_context)
- armv7m->post_restore_context(target);
-
return ERROR_OK;
}
return ERROR_OK;
}
-static int armv7m_read_core_reg(struct target *target, int num)
+static int armv7m_read_core_reg(struct target *target, unsigned num)
{
uint32_t reg_value;
int retval;
struct armv7m_core_reg * armv7m_core_reg;
struct armv7m_common *armv7m = target_to_armv7m(target);
- if ((num < 0) || (num >= ARMV7M_NUM_REGS))
+ if (num >= ARMV7M_NUM_REGS)
return ERROR_INVALID_ARGUMENTS;
armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info;
return retval;
}
-static int armv7m_write_core_reg(struct target *target, int num)
+static int armv7m_write_core_reg(struct target *target, unsigned num)
{
int retval;
uint32_t reg_value;
struct armv7m_core_reg *armv7m_core_reg;
struct armv7m_common *armv7m = target_to_armv7m(target);
- if ((num < 0) || (num >= ARMV7M_NUM_REGS))
+ if (num >= ARMV7M_NUM_REGS)
return ERROR_INVALID_ARGUMENTS;
reg_value = buf_get_u32(armv7m->core_cache->reg_list[num].value, 0, 32);
return ERROR_OK;
}
-/** Invalidates cache of core registers set up by armv7m_build_reg_cache(). */
-int armv7m_invalidate_core_regs(struct target *target)
-{
- struct armv7m_common *armv7m = target_to_armv7m(target);
- int i;
-
- for (i = 0; i < armv7m->core_cache->num_regs; i++)
- {
- armv7m->core_cache->reg_list[i].valid = 0;
- armv7m->core_cache->reg_list[i].dirty = 0;
- }
-
- return ERROR_OK;
-}
-
/**
* Returns generic ARM userspace registers to GDB.
* GDB doesn't quite understand that most ARMs don't have floating point
}
for (i = 16; i < 24; i++)
- {
- (*reg_list)[i] = &armv7m_gdb_dummy_fp_reg;
- }
-
- (*reg_list)[24] = &armv7m_gdb_dummy_fps_reg;
+ (*reg_list)[i] = &arm_gdb_dummy_fp_reg;
+ (*reg_list)[24] = &arm_gdb_dummy_fps_reg;
#ifdef ARMV7_GDB_HACKS
/* use dummy cpsr reg otherwise gdb may try and set the thumb bit */
/* ARMV7M is always in thumb mode, try to make GDB understand this
* if it does not support this arch */
- *((char*)armv7m->core_cache->reg_list[15].value) |= 1;
+ *((char*)armv7m->arm.pc->value) |= 1;
#else
(*reg_list)[25] = &armv7m->core_cache->reg_list[ARMV7M_xPSR];
#endif
struct armv7m_algorithm *armv7m_algorithm_info = arch_info;
enum armv7m_mode core_mode = armv7m->core_mode;
int retval = ERROR_OK;
- int i;
uint32_t context[ARMV7M_NUM_REGS];
+ /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
+ * at the exit point */
+
if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC)
{
LOG_ERROR("current target isn't an ARMV7M target");
/* refresh core register cache */
/* Not needed if core register cache is always consistent with target process state */
- for (i = 0; i < ARMV7M_NUM_REGS; i++)
+ for (unsigned i = 0; i < ARMV7M_NUM_REGS; i++)
{
if (!armv7m->core_cache->reg_list[i].valid)
armv7m->read_core_reg(target, i);
context[i] = buf_get_u32(armv7m->core_cache->reg_list[i].value, 0, 32);
}
- for (i = 0; i < num_mem_params; i++)
+ for (int i = 0; i < num_mem_params; i++)
{
if ((retval = target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
return retval;
}
- for (i = 0; i < num_reg_params; i++)
+ for (int i = 0; i < num_reg_params; i++)
{
struct reg *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
// uint32_t regvalue;
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;
}
// regvalue = buf_get_u32(reg_params[i].value, 0, 32);
armv7m->core_cache->reg_list[ARMV7M_CONTROL].valid = 1;
}
- /* REVISIT speed things up (3% or so in one case) by requiring
- * algorithms to include a BKPT instruction at each exit point.
- * This eliminates overheads of adding/removing a breakpoint.
- */
-
- /* ARMV7M always runs in Thumb state */
- if ((retval = breakpoint_add(target, exit_point, 2, BKPT_SOFT)) != ERROR_OK)
- {
- LOG_ERROR("can't add breakpoint to finish algorithm execution");
- return ERROR_TARGET_FAILURE;
- }
-
retval = armv7m_run_and_wait(target, entry_point, timeout_ms, exit_point, armv7m);
- breakpoint_remove(target, exit_point);
-
if (retval != ERROR_OK)
{
return retval;
}
/* Read memory values to mem_params[] */
- for (i = 0; i < num_mem_params; i++)
+ for (int i = 0; i < num_mem_params; i++)
{
if (mem_params[i].direction != PARAM_OUT)
if ((retval = target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
}
/* Copy core register values to reg_params[] */
- for (i = 0; i < num_reg_params; i++)
+ for (int i = 0; i < num_reg_params; i++)
{
if (reg_params[i].direction != PARAM_OUT)
{
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;
}
buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
}
}
- for (i = ARMV7M_NUM_REGS - 1; i >= 0; i--)
+ for (int i = ARMV7M_NUM_REGS - 1; i >= 0; i--)
{
uint32_t regvalue;
regvalue = buf_get_u32(armv7m->core_cache->reg_list[i].value, 0, 32);
int armv7m_arch_state(struct target *target)
{
struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct arm *arm = &armv7m->arm;
uint32_t ctrl, sp;
ctrl = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_CONTROL].value, 0, 32);
sp = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_R13].value, 0, 32);
LOG_USER("target halted due to %s, current mode: %s %s\n"
- "xPSR: %#8.8" PRIx32 " pc: %#8.8" PRIx32 " %csp: %#8.8" PRIx32,
- Jim_Nvp_value2name_simple(nvp_target_debug_reason,
- target->debug_reason)->name,
+ "xPSR: %#8.8" PRIx32 " pc: %#8.8" PRIx32 " %csp: %#8.8" PRIx32 "%s",
+ debug_reason_name(target),
armv7m_mode_strings[armv7m->core_mode],
armv7m_exception_string(armv7m->exception_number),
- buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32),
- buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_PC].value, 0, 32),
+ buf_get_u32(arm->cpsr->value, 0, 32),
+ buf_get_u32(arm->pc->value, 0, 32),
(ctrl & 0x02) ? 'p' : 'm',
- sp);
+ sp,
+ arm->is_semihosting ? ", semihosting" : "");
return ERROR_OK;
}
+static const struct reg_arch_type armv7m_reg_type = {
+ .get = armv7m_get_core_reg,
+ .set = armv7m_set_core_reg,
+};
/** Builds cache of architecturally defined registers. */
struct reg_cache *armv7m_build_reg_cache(struct target *target)
{
struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct arm *arm = &armv7m->arm;
int num_regs = ARMV7M_NUM_REGS;
struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
struct reg_cache *cache = malloc(sizeof(struct reg_cache));
struct armv7m_core_reg *arch_info = calloc(num_regs, sizeof(struct armv7m_core_reg));
int i;
- if (armv7m_core_reg_arch_type == -1)
- {
- armv7m_core_reg_arch_type = register_reg_arch_type(armv7m_get_core_reg, armv7m_set_core_reg);
- }
-
- register_init_dummy(&armv7m_gdb_dummy_fps_reg);
#ifdef ARMV7_GDB_HACKS
register_init_dummy(&armv7m_gdb_dummy_cpsr_reg);
#endif
- register_init_dummy(&armv7m_gdb_dummy_fp_reg);
/* Build the process context cache */
cache->name = "arm v7m registers";
reg_list[i].value = calloc(1, 4);
reg_list[i].dirty = 0;
reg_list[i].valid = 0;
- reg_list[i].bitfield_desc = NULL;
- reg_list[i].num_bitfields = 0;
- reg_list[i].arch_type = armv7m_core_reg_arch_type;
+ reg_list[i].type = &armv7m_reg_type;
reg_list[i].arch_info = &arch_info[i];
}
+ arm->cpsr = reg_list + ARMV7M_xPSR;
+ arm->pc = reg_list + ARMV7M_PC;
+ arm->core_cache = cache;
return cache;
}
+static int armv7m_setup_semihosting(struct target *target, int enable)
+{
+ /* nothing todo for armv7m */
+ return ERROR_OK;
+}
+
/** Sets up target as a generic ARMv7-M core */
int armv7m_init_arch_info(struct target *target, struct armv7m_common *armv7m)
{
- /* register arch-specific functions */
+ struct arm *arm = &armv7m->arm;
- target->arch_info = armv7m;
+ armv7m->common_magic = ARMV7M_COMMON_MAGIC;
+
+ arm->core_type = ARM_MODE_THREAD;
+ arm->arch_info = armv7m;
+ arm->setup_semihosting = armv7m_setup_semihosting;
+
+ /* FIXME remove v7m-specific r/w core_reg functions;
+ * use the generic ARM core support..
+ */
armv7m->read_core_reg = armv7m_read_core_reg;
armv7m->write_core_reg = armv7m_write_core_reg;
- return ERROR_OK;
+ return arm_init_arch_info(target, arm);
}
/** Generates a CRC32 checksum of a memory region. */
/* ncomp: */
0x429C, /* cmp r4, r3 */
0xD1E9, /* bne nbyte */
- /* end: */
- 0xE7FE, /* b end */
+ 0xBE00, /* bkpt #0 */
0x1DB7, 0x04C1 /* CRC32XOR: .word 0x04C11DB7 */
};
}
/* convert flash writing code into a buffer in target endianness */
- for (i = 0; i < (sizeof(cortex_m3_crc_code)/sizeof(uint16_t)); i++)
+ for (i = 0; i < ARRAY_SIZE(cortex_m3_crc_code); i++)
if ((retval = target_write_u16(target, crc_algorithm->address + i*sizeof(uint16_t), cortex_m3_crc_code[i])) != ERROR_OK)
{
return retval;
0xEA02, 0x0203, /* and r2, r2, r3 */
0x3901, /* subs r1, r1, #1 */
0xD1F9, /* bne loop */
- /* end: */
- 0xE7FE, /* b end */
+ 0xBE00, /* bkpt #0 */
};
/* make sure we have a working area */
}
/* convert flash writing code into a buffer in target endianness */
- for (i = 0; i < (sizeof(erase_check_code)/sizeof(uint16_t)); i++)
+ for (i = 0; i < ARRAY_SIZE(erase_check_code); i++)
target_write_u16(target, erase_check_algorithm->address + i*sizeof(uint16_t), erase_check_code[i]);
armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
return ERROR_OK;
}
-/*--------------------------------------------------------------------------*/
-
-/*
- * Only stuff below this line should need to verify that its target
- * is an ARMv7-M node.
- *
- * FIXME yet none of it _does_ verify target types yet!
- */
-
-
-/*
- * Return the debug ap baseaddress in hexadecimal;
- * no extra output to simplify script processing
- */
-COMMAND_HANDLER(handle_dap_baseaddr_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
- uint32_t apsel, apselsave, baseaddr;
- int retval;
-
- apselsave = swjdp->apsel;
- switch (argc) {
- case 0:
- apsel = swjdp->apsel;
- break;
- case 1:
- COMMAND_PARSE_NUMBER(u32, args[0], apsel);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- if (apselsave != apsel)
- dap_ap_select(swjdp, apsel);
-
- dap_ap_read_reg_u32(swjdp, 0xF8, &baseaddr);
- retval = swjdp_transaction_endcheck(swjdp);
- command_print(cmd_ctx, "0x%8.8" PRIx32 "", baseaddr);
-
- if (apselsave != apsel)
- dap_ap_select(swjdp, apselsave);
-
- return retval;
-}
-
-/*
- * Return the debug ap id in hexadecimal;
- * no extra output to simplify script processing
- */
-COMMAND_HANDLER(handle_dap_apid_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
-
- return CALL_COMMAND_HANDLER(dap_apid_command, swjdp);
-}
-
-COMMAND_HANDLER(handle_dap_apsel_command)
+int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found)
{
- struct target *target = get_current_target(cmd_ctx);
struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
+ struct reg *r = armv7m->arm.pc;
+ bool result = false;
- return CALL_COMMAND_HANDLER(dap_apsel_command, swjdp);
-}
-
-COMMAND_HANDLER(handle_dap_memaccess_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
- return CALL_COMMAND_HANDLER(dap_memaccess_command, swjdp);
-}
+ /* if we halted last time due to a bkpt instruction
+ * then we have to manually step over it, otherwise
+ * the core will break again */
+ if (target->debug_reason == DBG_REASON_BREAKPOINT)
+ {
+ uint16_t op;
+ uint32_t pc = buf_get_u32(r->value, 0, 32);
-COMMAND_HANDLER(handle_dap_info_command)
-{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7m_common *armv7m = target_to_armv7m(target);
- struct swjdp_common *swjdp = &armv7m->swjdp_info;
- uint32_t apsel;
-
- switch (argc) {
- case 0:
- apsel = swjdp->apsel;
- break;
- case 1:
- COMMAND_PARSE_NUMBER(u32, args[0], apsel);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
+ pc &= ~1;
+ if (target_read_u16(target, pc, &op) == ERROR_OK)
+ {
+ if ((op & 0xFF00) == 0xBE00)
+ {
+ pc = buf_get_u32(r->value, 0, 32) + 2;
+ buf_set_u32(r->value, 0, 32, pc);
+ r->dirty = true;
+ r->valid = true;
+ result = true;
+ LOG_DEBUG("Skipping over BKPT instruction");
+ }
+ }
}
- return dap_info_command(cmd_ctx, swjdp, apsel);
-}
-
-/** Registers commands used to access DAP resources. */
-int armv7m_register_commands(struct command_context *cmd_ctx)
-{
- struct command *arm_adi_v5_dap_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,
- "Displays 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,
- "Displays 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,
- "Displays 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]");
+ if (inst_found) {
+ *inst_found = result;
+ }
return ERROR_OK;
}
+
+const struct command_registration armv7m_command_handlers[] = {
+ {
+ .chain = arm_command_handlers,
+ },
+ {
+ .chain = dap_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};