1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2006 by Magnus Lundin *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * Copyright (C) 2007,2008 Øyvind Harboe *
12 * oyvind.harboe@zylin.com *
14 * Copyright (C) 2018 by Liviu Ionescu *
17 * Copyright (C) 2019 by Tomas Vanek *
20 * This program is free software; you can redistribute it and/or modify *
21 * it under the terms of the GNU General Public License as published by *
22 * the Free Software Foundation; either version 2 of the License, or *
23 * (at your option) any later version. *
25 * This program is distributed in the hope that it will be useful, *
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
28 * GNU General Public License for more details. *
30 * You should have received a copy of the GNU General Public License *
31 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
33 * ARMv7-M Architecture, Application Level Reference Manual *
34 * ARM DDI 0405C (September 2008) *
36 ***************************************************************************/
42 #include "breakpoints.h"
44 #include "algorithm.h"
46 #include "semihosting_common.h"
49 #define _DEBUG_INSTRUCTION_EXECUTION_
52 static const char * const armv7m_exception_strings
[] = {
53 "", "Reset", "NMI", "HardFault",
54 "MemManage", "BusFault", "UsageFault", "SecureFault",
55 "RESERVED", "RESERVED", "RESERVED", "SVCall",
56 "DebugMonitor", "RESERVED", "PendSV", "SysTick"
59 /* PSP is used in some thread modes */
60 const int armv7m_psp_reg_map
[ARMV7M_NUM_CORE_REGS
] = {
61 ARMV7M_R0
, ARMV7M_R1
, ARMV7M_R2
, ARMV7M_R3
,
62 ARMV7M_R4
, ARMV7M_R5
, ARMV7M_R6
, ARMV7M_R7
,
63 ARMV7M_R8
, ARMV7M_R9
, ARMV7M_R10
, ARMV7M_R11
,
64 ARMV7M_R12
, ARMV7M_PSP
, ARMV7M_R14
, ARMV7M_PC
,
68 /* MSP is used in handler and some thread modes */
69 const int armv7m_msp_reg_map
[ARMV7M_NUM_CORE_REGS
] = {
70 ARMV7M_R0
, ARMV7M_R1
, ARMV7M_R2
, ARMV7M_R3
,
71 ARMV7M_R4
, ARMV7M_R5
, ARMV7M_R6
, ARMV7M_R7
,
72 ARMV7M_R8
, ARMV7M_R9
, ARMV7M_R10
, ARMV7M_R11
,
73 ARMV7M_R12
, ARMV7M_MSP
, ARMV7M_R14
, ARMV7M_PC
,
78 * These registers are not memory-mapped. The ARMv7-M profile includes
79 * memory mapped registers too, such as for the NVIC (interrupt controller)
80 * and SysTick (timer) modules; those can mostly be treated as peripherals.
82 * The ARMv6-M profile is almost identical in this respect, except that it
83 * doesn't include basepri or faultmask registers.
93 { ARMV7M_R0
, "r0", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
94 { ARMV7M_R1
, "r1", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
95 { ARMV7M_R2
, "r2", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
96 { ARMV7M_R3
, "r3", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
97 { ARMV7M_R4
, "r4", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
98 { ARMV7M_R5
, "r5", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
99 { ARMV7M_R6
, "r6", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
100 { ARMV7M_R7
, "r7", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
101 { ARMV7M_R8
, "r8", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
102 { ARMV7M_R9
, "r9", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
103 { ARMV7M_R10
, "r10", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
104 { ARMV7M_R11
, "r11", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
105 { ARMV7M_R12
, "r12", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
106 { ARMV7M_R13
, "sp", 32, REG_TYPE_DATA_PTR
, "general", "org.gnu.gdb.arm.m-profile" },
107 { ARMV7M_R14
, "lr", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
108 { ARMV7M_PC
, "pc", 32, REG_TYPE_CODE_PTR
, "general", "org.gnu.gdb.arm.m-profile" },
109 { ARMV7M_xPSR
, "xPSR", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
111 { ARMV7M_MSP
, "msp", 32, REG_TYPE_DATA_PTR
, "system", "org.gnu.gdb.arm.m-system" },
112 { ARMV7M_PSP
, "psp", 32, REG_TYPE_DATA_PTR
, "system", "org.gnu.gdb.arm.m-system" },
114 /* A working register for packing/unpacking special regs, hidden from gdb */
115 { ARMV7M_PMSK_BPRI_FLTMSK_CTRL
, "pmsk_bpri_fltmsk_ctrl", 32, REG_TYPE_INT
, NULL
, NULL
},
117 /* WARNING: If you use armv7m_write_core_reg() on one of 4 following
118 * special registers, the new data go to ARMV7M_PMSK_BPRI_FLTMSK_CTRL
119 * cache only and are not flushed to CPU HW register.
120 * To trigger write to CPU HW register, add
121 * armv7m_write_core_reg(,,ARMV7M_PMSK_BPRI_FLTMSK_CTRL,);
123 { ARMV7M_PRIMASK
, "primask", 1, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
124 { ARMV7M_BASEPRI
, "basepri", 8, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
125 { ARMV7M_FAULTMASK
, "faultmask", 1, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
126 { ARMV7M_CONTROL
, "control", 3, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
128 { ARMV7M_D0
, "d0", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
129 { ARMV7M_D1
, "d1", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
130 { ARMV7M_D2
, "d2", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
131 { ARMV7M_D3
, "d3", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
132 { ARMV7M_D4
, "d4", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
133 { ARMV7M_D5
, "d5", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
134 { ARMV7M_D6
, "d6", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
135 { ARMV7M_D7
, "d7", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
136 { ARMV7M_D8
, "d8", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
137 { ARMV7M_D9
, "d9", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
138 { ARMV7M_D10
, "d10", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
139 { ARMV7M_D11
, "d11", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
140 { ARMV7M_D12
, "d12", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
141 { ARMV7M_D13
, "d13", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
142 { ARMV7M_D14
, "d14", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
143 { ARMV7M_D15
, "d15", 64, REG_TYPE_IEEE_DOUBLE
, "float", "org.gnu.gdb.arm.vfp" },
145 { ARMV7M_FPSCR
, "fpscr", 32, REG_TYPE_INT
, "float", "org.gnu.gdb.arm.vfp" },
148 #define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs)
151 * Restores target context using the cache of core registers set up
152 * by armv7m_build_reg_cache(), calling optional core-specific hooks.
154 int armv7m_restore_context(struct target
*target
)
157 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
158 struct reg_cache
*cache
= armv7m
->arm
.core_cache
;
162 if (armv7m
->pre_restore_context
)
163 armv7m
->pre_restore_context(target
);
165 /* The descending order of register writes is crucial for correct
166 * packing of ARMV7M_PMSK_BPRI_FLTMSK_CTRL!
167 * See also comments in the register table above */
168 for (i
= cache
->num_regs
- 1; i
>= 0; i
--) {
169 if (cache
->reg_list
[i
].dirty
) {
170 armv7m
->arm
.write_core_reg(target
, &cache
->reg_list
[i
], i
,
171 ARM_MODE_ANY
, cache
->reg_list
[i
].value
);
178 /* Core state functions */
181 * Maps ISR number (from xPSR) to name.
182 * Note that while names and meanings for the first sixteen are standardized
183 * (with zero not a true exception), external interrupts are only numbered.
184 * They are assigned by vendors, which generally assign different numbers to
185 * peripherals (such as UART0 or a USB peripheral controller).
187 const char *armv7m_exception_string(int number
)
189 static char enamebuf
[32];
191 if ((number
< 0) | (number
> 511))
192 return "Invalid exception";
194 return armv7m_exception_strings
[number
];
195 sprintf(enamebuf
, "External Interrupt(%i)", number
- 16);
199 static int armv7m_get_core_reg(struct reg
*reg
)
202 struct arm_reg
*armv7m_reg
= reg
->arch_info
;
203 struct target
*target
= armv7m_reg
->target
;
204 struct arm
*arm
= target_to_arm(target
);
206 if (target
->state
!= TARGET_HALTED
)
207 return ERROR_TARGET_NOT_HALTED
;
209 retval
= arm
->read_core_reg(target
, reg
, reg
->number
, arm
->core_mode
);
214 static int armv7m_set_core_reg(struct reg
*reg
, uint8_t *buf
)
216 struct arm_reg
*armv7m_reg
= reg
->arch_info
;
217 struct target
*target
= armv7m_reg
->target
;
219 if (target
->state
!= TARGET_HALTED
)
220 return ERROR_TARGET_NOT_HALTED
;
222 buf_cpy(buf
, reg
->value
, reg
->size
);
229 static uint32_t armv7m_map_id_to_regsel(unsigned int arm_reg_id
)
231 switch (arm_reg_id
) {
232 case ARMV7M_R0
... ARMV7M_R14
:
237 /* NOTE: we "know" here that the register identifiers
238 * match the Cortex-M DCRSR.REGSEL selectors values
239 * for R0..R14, PC, xPSR, MSP, and PSP.
243 case ARMV7M_PMSK_BPRI_FLTMSK_CTRL
:
244 return ARMV7M_REGSEL_PMSK_BPRI_FLTMSK_CTRL
;
247 return ARMV7M_REGSEL_FPSCR
;
249 case ARMV7M_D0
... ARMV7M_D15
:
250 return ARMV7M_REGSEL_S0
+ 2 * (arm_reg_id
- ARMV7M_D0
);
253 LOG_ERROR("Bad register ID %u", arm_reg_id
);
258 static bool armv7m_map_reg_packing(unsigned int arm_reg_id
,
259 unsigned int *reg32_id
, uint32_t *offset
)
261 switch (arm_reg_id
) {
264 *reg32_id
= ARMV7M_PMSK_BPRI_FLTMSK_CTRL
;
268 *reg32_id
= ARMV7M_PMSK_BPRI_FLTMSK_CTRL
;
271 case ARMV7M_FAULTMASK
:
272 *reg32_id
= ARMV7M_PMSK_BPRI_FLTMSK_CTRL
;
276 *reg32_id
= ARMV7M_PMSK_BPRI_FLTMSK_CTRL
;
285 static int armv7m_read_core_reg(struct target
*target
, struct reg
*r
,
286 int num
, enum arm_mode mode
)
290 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
292 assert(num
< (int)armv7m
->arm
.core_cache
->num_regs
);
293 assert(num
== (int)r
->number
);
295 /* If a code calls read_reg, it expects the cache is no more dirty.
296 * Clear the dirty flag regardless of the later read succeeds or not
297 * to prevent unwanted cache flush after a read error */
301 /* any 8-bit or shorter register is packed */
302 uint32_t offset
= 0; /* silence false gcc warning */
303 unsigned int reg32_id
;
305 bool is_packed
= armv7m_map_reg_packing(num
, ®32_id
, &offset
);
307 struct reg
*r32
= &armv7m
->arm
.core_cache
->reg_list
[reg32_id
];
309 /* Read 32-bit container register if not cached */
311 retval
= armv7m_read_core_reg(target
, r32
, reg32_id
, mode
);
312 if (retval
!= ERROR_OK
)
316 /* Copy required bits of 32-bit container register */
317 buf_cpy(r32
->value
+ offset
, r
->value
, r
->size
);
320 assert(r
->size
== 32 || r
->size
== 64);
322 struct arm_reg
*armv7m_core_reg
= r
->arch_info
;
323 uint32_t regsel
= armv7m_map_id_to_regsel(armv7m_core_reg
->num
);
325 retval
= armv7m
->load_core_reg_u32(target
, regsel
, ®_value
);
326 if (retval
!= ERROR_OK
)
328 buf_set_u32(r
->value
, 0, 32, reg_value
);
331 retval
= armv7m
->load_core_reg_u32(target
, regsel
+ 1, ®_value
);
332 if (retval
!= ERROR_OK
) {
336 buf_set_u32(r
->value
+ 4, 0, 32, reg_value
);
338 uint64_t q
= buf_get_u64(r
->value
, 0, 64);
339 LOG_DEBUG("read %s value 0x%016" PRIx64
, r
->name
, q
);
341 LOG_DEBUG("read %s value 0x%08" PRIx32
, r
->name
, reg_value
);
350 static int armv7m_write_core_reg(struct target
*target
, struct reg
*r
,
351 int num
, enum arm_mode mode
, uint8_t *value
)
355 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
357 assert(num
< (int)armv7m
->arm
.core_cache
->num_regs
);
358 assert(num
== (int)r
->number
);
360 if (value
!= r
->value
) {
361 /* If we are not flushing the cache, store the new value to the cache */
362 buf_cpy(value
, r
->value
, r
->size
);
366 /* any 8-bit or shorter register is packed */
367 uint32_t offset
= 0; /* silence false gcc warning */
368 unsigned int reg32_id
;
370 bool is_packed
= armv7m_map_reg_packing(num
, ®32_id
, &offset
);
372 struct reg
*r32
= &armv7m
->arm
.core_cache
->reg_list
[reg32_id
];
375 /* Before merging with other parts ensure the 32-bit register is valid */
376 retval
= armv7m_read_core_reg(target
, r32
, reg32_id
, mode
);
377 if (retval
!= ERROR_OK
)
381 /* Write a part to the 32-bit container register */
382 buf_cpy(value
, r32
->value
+ offset
, r
->size
);
386 assert(r
->size
== 32 || r
->size
== 64);
388 struct arm_reg
*armv7m_core_reg
= r
->arch_info
;
389 uint32_t regsel
= armv7m_map_id_to_regsel(armv7m_core_reg
->num
);
391 t
= buf_get_u32(value
, 0, 32);
392 retval
= armv7m
->store_core_reg_u32(target
, regsel
, t
);
393 if (retval
!= ERROR_OK
)
397 t
= buf_get_u32(value
+ 4, 0, 32);
398 retval
= armv7m
->store_core_reg_u32(target
, regsel
+ 1, t
);
399 if (retval
!= ERROR_OK
)
402 uint64_t q
= buf_get_u64(value
, 0, 64);
403 LOG_DEBUG("write %s value 0x%016" PRIx64
, r
->name
, q
);
405 LOG_DEBUG("write %s value 0x%08" PRIx32
, r
->name
, t
);
416 LOG_ERROR("Error setting register %s", r
->name
);
421 * Returns generic ARM userspace registers to GDB.
423 int armv7m_get_gdb_reg_list(struct target
*target
, struct reg
**reg_list
[],
424 int *reg_list_size
, enum target_register_class reg_class
)
426 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
429 if (reg_class
== REG_CLASS_ALL
)
430 size
= armv7m
->arm
.core_cache
->num_regs
;
432 size
= ARMV7M_NUM_CORE_REGS
;
434 *reg_list
= malloc(sizeof(struct reg
*) * size
);
435 if (*reg_list
== NULL
)
438 for (i
= 0; i
< size
; i
++)
439 (*reg_list
)[i
] = &armv7m
->arm
.core_cache
->reg_list
[i
];
441 *reg_list_size
= size
;
446 /** Runs a Thumb algorithm in the target. */
447 int armv7m_run_algorithm(struct target
*target
,
448 int num_mem_params
, struct mem_param
*mem_params
,
449 int num_reg_params
, struct reg_param
*reg_params
,
450 target_addr_t entry_point
, target_addr_t exit_point
,
451 int timeout_ms
, void *arch_info
)
455 retval
= armv7m_start_algorithm(target
,
456 num_mem_params
, mem_params
,
457 num_reg_params
, reg_params
,
458 entry_point
, exit_point
,
461 if (retval
== ERROR_OK
)
462 retval
= armv7m_wait_algorithm(target
,
463 num_mem_params
, mem_params
,
464 num_reg_params
, reg_params
,
465 exit_point
, timeout_ms
,
471 /** Starts a Thumb algorithm in the target. */
472 int armv7m_start_algorithm(struct target
*target
,
473 int num_mem_params
, struct mem_param
*mem_params
,
474 int num_reg_params
, struct reg_param
*reg_params
,
475 target_addr_t entry_point
, target_addr_t exit_point
,
478 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
479 struct armv7m_algorithm
*armv7m_algorithm_info
= arch_info
;
480 enum arm_mode core_mode
= armv7m
->arm
.core_mode
;
481 int retval
= ERROR_OK
;
483 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
484 * at the exit point */
486 if (armv7m_algorithm_info
->common_magic
!= ARMV7M_COMMON_MAGIC
) {
487 LOG_ERROR("current target isn't an ARMV7M target");
488 return ERROR_TARGET_INVALID
;
491 if (target
->state
!= TARGET_HALTED
) {
492 LOG_WARNING("target not halted");
493 return ERROR_TARGET_NOT_HALTED
;
496 /* refresh core register cache
497 * Not needed if core register cache is always consistent with target process state */
498 for (unsigned i
= 0; i
< armv7m
->arm
.core_cache
->num_regs
; i
++) {
500 armv7m_algorithm_info
->context
[i
] = buf_get_u32(
501 armv7m
->arm
.core_cache
->reg_list
[i
].value
,
506 for (int i
= 0; i
< num_mem_params
; i
++) {
507 if (mem_params
[i
].direction
== PARAM_IN
)
509 retval
= target_write_buffer(target
, mem_params
[i
].address
,
511 mem_params
[i
].value
);
512 if (retval
!= ERROR_OK
)
516 for (int i
= 0; i
< num_reg_params
; i
++) {
517 if (reg_params
[i
].direction
== PARAM_IN
)
521 register_get_by_name(armv7m
->arm
.core_cache
, reg_params
[i
].reg_name
, 0);
522 /* uint32_t regvalue; */
525 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
526 return ERROR_COMMAND_SYNTAX_ERROR
;
529 if (reg
->size
!= reg_params
[i
].size
) {
530 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size",
531 reg_params
[i
].reg_name
);
532 return ERROR_COMMAND_SYNTAX_ERROR
;
535 /* regvalue = buf_get_u32(reg_params[i].value, 0, 32); */
536 armv7m_set_core_reg(reg
, reg_params
[i
].value
);
541 * Ensure xPSR.T is set to avoid trying to run things in arm
542 * (non-thumb) mode, which armv7m does not support.
544 * We do this by setting the entirety of xPSR, which should
545 * remove all the unknowns about xPSR state.
547 * Because xPSR.T is populated on reset from the vector table,
548 * it might be 0 if the vector table has "bad" data in it.
550 struct reg
*reg
= &armv7m
->arm
.core_cache
->reg_list
[ARMV7M_xPSR
];
551 buf_set_u32(reg
->value
, 0, 32, 0x01000000);
556 if (armv7m_algorithm_info
->core_mode
!= ARM_MODE_ANY
&&
557 armv7m_algorithm_info
->core_mode
!= core_mode
) {
559 /* we cannot set ARM_MODE_HANDLER, so use ARM_MODE_THREAD instead */
560 if (armv7m_algorithm_info
->core_mode
== ARM_MODE_HANDLER
) {
561 armv7m_algorithm_info
->core_mode
= ARM_MODE_THREAD
;
562 LOG_INFO("ARM_MODE_HANDLER not currently supported, using ARM_MODE_THREAD instead");
565 LOG_DEBUG("setting core_mode: 0x%2.2x", armv7m_algorithm_info
->core_mode
);
566 buf_set_u32(armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].value
,
567 0, 1, armv7m_algorithm_info
->core_mode
);
568 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].dirty
= true;
569 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].valid
= true;
572 /* save previous core mode */
573 armv7m_algorithm_info
->core_mode
= core_mode
;
575 retval
= target_resume(target
, 0, entry_point
, 1, 1);
580 /** Waits for an algorithm in the target. */
581 int armv7m_wait_algorithm(struct target
*target
,
582 int num_mem_params
, struct mem_param
*mem_params
,
583 int num_reg_params
, struct reg_param
*reg_params
,
584 target_addr_t exit_point
, int timeout_ms
,
587 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
588 struct armv7m_algorithm
*armv7m_algorithm_info
= arch_info
;
589 int retval
= ERROR_OK
;
591 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
592 * at the exit point */
594 if (armv7m_algorithm_info
->common_magic
!= ARMV7M_COMMON_MAGIC
) {
595 LOG_ERROR("current target isn't an ARMV7M target");
596 return ERROR_TARGET_INVALID
;
599 retval
= target_wait_state(target
, TARGET_HALTED
, timeout_ms
);
600 /* If the target fails to halt due to the breakpoint, force a halt */
601 if (retval
!= ERROR_OK
|| target
->state
!= TARGET_HALTED
) {
602 retval
= target_halt(target
);
603 if (retval
!= ERROR_OK
)
605 retval
= target_wait_state(target
, TARGET_HALTED
, 500);
606 if (retval
!= ERROR_OK
)
608 return ERROR_TARGET_TIMEOUT
;
612 /* PC value has been cached in cortex_m_debug_entry() */
613 uint32_t pc
= buf_get_u32(armv7m
->arm
.pc
->value
, 0, 32);
614 if (pc
!= exit_point
) {
615 LOG_DEBUG("failed algorithm halted at 0x%" PRIx32
", expected 0x%" TARGET_PRIxADDR
,
617 return ERROR_TARGET_ALGO_EXIT
;
621 /* Read memory values to mem_params[] */
622 for (int i
= 0; i
< num_mem_params
; i
++) {
623 if (mem_params
[i
].direction
!= PARAM_OUT
) {
624 retval
= target_read_buffer(target
, mem_params
[i
].address
,
626 mem_params
[i
].value
);
627 if (retval
!= ERROR_OK
)
632 /* Copy core register values to reg_params[] */
633 for (int i
= 0; i
< num_reg_params
; i
++) {
634 if (reg_params
[i
].direction
!= PARAM_OUT
) {
635 struct reg
*reg
= register_get_by_name(armv7m
->arm
.core_cache
,
636 reg_params
[i
].reg_name
,
640 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
641 return ERROR_COMMAND_SYNTAX_ERROR
;
644 if (reg
->size
!= reg_params
[i
].size
) {
646 "BUG: register '%s' size doesn't match reg_params[i].size",
647 reg_params
[i
].reg_name
);
648 return ERROR_COMMAND_SYNTAX_ERROR
;
651 buf_set_u32(reg_params
[i
].value
, 0, 32, buf_get_u32(reg
->value
, 0, 32));
655 for (int i
= armv7m
->arm
.core_cache
->num_regs
- 1; i
>= 0; i
--) {
657 regvalue
= buf_get_u32(armv7m
->arm
.core_cache
->reg_list
[i
].value
, 0, 32);
658 if (regvalue
!= armv7m_algorithm_info
->context
[i
]) {
659 LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32
,
660 armv7m
->arm
.core_cache
->reg_list
[i
].name
,
661 armv7m_algorithm_info
->context
[i
]);
662 buf_set_u32(armv7m
->arm
.core_cache
->reg_list
[i
].value
,
663 0, 32, armv7m_algorithm_info
->context
[i
]);
664 armv7m
->arm
.core_cache
->reg_list
[i
].valid
= true;
665 armv7m
->arm
.core_cache
->reg_list
[i
].dirty
= true;
669 /* restore previous core mode */
670 if (armv7m_algorithm_info
->core_mode
!= armv7m
->arm
.core_mode
) {
671 LOG_DEBUG("restoring core_mode: 0x%2.2x", armv7m_algorithm_info
->core_mode
);
672 buf_set_u32(armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].value
,
673 0, 1, armv7m_algorithm_info
->core_mode
);
674 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].dirty
= true;
675 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].valid
= true;
678 armv7m
->arm
.core_mode
= armv7m_algorithm_info
->core_mode
;
683 /** Logs summary of ARMv7-M state for a halted target. */
684 int armv7m_arch_state(struct target
*target
)
686 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
687 struct arm
*arm
= &armv7m
->arm
;
690 /* avoid filling log waiting for fileio reply */
691 if (target
->semihosting
&& target
->semihosting
->hit_fileio
)
694 ctrl
= buf_get_u32(arm
->core_cache
->reg_list
[ARMV7M_CONTROL
].value
, 0, 32);
695 sp
= buf_get_u32(arm
->core_cache
->reg_list
[ARMV7M_R13
].value
, 0, 32);
697 LOG_USER("target halted due to %s, current mode: %s %s\n"
698 "xPSR: %#8.8" PRIx32
" pc: %#8.8" PRIx32
" %csp: %#8.8" PRIx32
"%s%s",
699 debug_reason_name(target
),
700 arm_mode_name(arm
->core_mode
),
701 armv7m_exception_string(armv7m
->exception_number
),
702 buf_get_u32(arm
->cpsr
->value
, 0, 32),
703 buf_get_u32(arm
->pc
->value
, 0, 32),
704 (ctrl
& 0x02) ? 'p' : 'm',
706 (target
->semihosting
&& target
->semihosting
->is_active
) ? ", semihosting" : "",
707 (target
->semihosting
&& target
->semihosting
->is_fileio
) ? " fileio" : "");
712 static const struct reg_arch_type armv7m_reg_type
= {
713 .get
= armv7m_get_core_reg
,
714 .set
= armv7m_set_core_reg
,
717 /** Builds cache of architecturally defined registers. */
718 struct reg_cache
*armv7m_build_reg_cache(struct target
*target
)
720 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
721 struct arm
*arm
= &armv7m
->arm
;
722 int num_regs
= ARMV7M_NUM_REGS
;
723 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
724 struct reg_cache
*cache
= malloc(sizeof(struct reg_cache
));
725 struct reg
*reg_list
= calloc(num_regs
, sizeof(struct reg
));
726 struct arm_reg
*arch_info
= calloc(num_regs
, sizeof(struct arm_reg
));
727 struct reg_feature
*feature
;
730 /* Build the process context cache */
731 cache
->name
= "arm v7m registers";
733 cache
->reg_list
= reg_list
;
734 cache
->num_regs
= num_regs
;
737 for (i
= 0; i
< num_regs
; i
++) {
738 arch_info
[i
].num
= armv7m_regs
[i
].id
;
739 arch_info
[i
].target
= target
;
740 arch_info
[i
].arm
= arm
;
742 reg_list
[i
].name
= armv7m_regs
[i
].name
;
743 reg_list
[i
].size
= armv7m_regs
[i
].bits
;
744 reg_list
[i
].value
= arch_info
[i
].value
;
745 reg_list
[i
].dirty
= false;
746 reg_list
[i
].valid
= false;
747 reg_list
[i
].hidden
= i
== ARMV7M_PMSK_BPRI_FLTMSK_CTRL
;
748 reg_list
[i
].type
= &armv7m_reg_type
;
749 reg_list
[i
].arch_info
= &arch_info
[i
];
751 reg_list
[i
].group
= armv7m_regs
[i
].group
;
752 reg_list
[i
].number
= i
;
753 reg_list
[i
].exist
= true;
754 reg_list
[i
].caller_save
= true; /* gdb defaults to true */
756 if (reg_list
[i
].hidden
)
759 feature
= calloc(1, sizeof(struct reg_feature
));
761 feature
->name
= armv7m_regs
[i
].feature
;
762 reg_list
[i
].feature
= feature
;
764 LOG_ERROR("unable to allocate feature list");
766 reg_list
[i
].reg_data_type
= calloc(1, sizeof(struct reg_data_type
));
767 if (reg_list
[i
].reg_data_type
)
768 reg_list
[i
].reg_data_type
->type
= armv7m_regs
[i
].type
;
770 LOG_ERROR("unable to allocate reg type list");
773 arm
->cpsr
= reg_list
+ ARMV7M_xPSR
;
774 arm
->pc
= reg_list
+ ARMV7M_PC
;
775 arm
->core_cache
= cache
;
780 void armv7m_free_reg_cache(struct target
*target
)
782 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
783 struct arm
*arm
= &armv7m
->arm
;
784 struct reg_cache
*cache
;
788 cache
= arm
->core_cache
;
793 for (i
= 0; i
< cache
->num_regs
; i
++) {
794 reg
= &cache
->reg_list
[i
];
797 free(reg
->reg_data_type
);
800 free(cache
->reg_list
[0].arch_info
);
801 free(cache
->reg_list
);
804 arm
->core_cache
= NULL
;
807 static int armv7m_setup_semihosting(struct target
*target
, int enable
)
809 /* nothing todo for armv7m */
813 /** Sets up target as a generic ARMv7-M core */
814 int armv7m_init_arch_info(struct target
*target
, struct armv7m_common
*armv7m
)
816 struct arm
*arm
= &armv7m
->arm
;
818 armv7m
->common_magic
= ARMV7M_COMMON_MAGIC
;
819 armv7m
->fp_feature
= FP_NONE
;
820 armv7m
->trace_config
.trace_bus_id
= 1;
821 /* Enable stimulus port #0 by default */
822 armv7m
->trace_config
.itm_ter
[0] = 1;
824 arm
->core_type
= ARM_CORE_TYPE_M_PROFILE
;
825 arm
->arch_info
= armv7m
;
826 arm
->setup_semihosting
= armv7m_setup_semihosting
;
828 arm
->read_core_reg
= armv7m_read_core_reg
;
829 arm
->write_core_reg
= armv7m_write_core_reg
;
831 return arm_init_arch_info(target
, arm
);
834 /** Generates a CRC32 checksum of a memory region. */
835 int armv7m_checksum_memory(struct target
*target
,
836 target_addr_t address
, uint32_t count
, uint32_t *checksum
)
838 struct working_area
*crc_algorithm
;
839 struct armv7m_algorithm armv7m_info
;
840 struct reg_param reg_params
[2];
843 static const uint8_t cortex_m_crc_code
[] = {
844 #include "../../contrib/loaders/checksum/armv7m_crc.inc"
847 retval
= target_alloc_working_area(target
, sizeof(cortex_m_crc_code
), &crc_algorithm
);
848 if (retval
!= ERROR_OK
)
851 retval
= target_write_buffer(target
, crc_algorithm
->address
,
852 sizeof(cortex_m_crc_code
), (uint8_t *)cortex_m_crc_code
);
853 if (retval
!= ERROR_OK
)
856 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
857 armv7m_info
.core_mode
= ARM_MODE_THREAD
;
859 init_reg_param(®_params
[0], "r0", 32, PARAM_IN_OUT
);
860 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
862 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
863 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
865 int timeout
= 20000 * (1 + (count
/ (1024 * 1024)));
867 retval
= target_run_algorithm(target
, 0, NULL
, 2, reg_params
, crc_algorithm
->address
,
868 crc_algorithm
->address
+ (sizeof(cortex_m_crc_code
) - 6),
869 timeout
, &armv7m_info
);
871 if (retval
== ERROR_OK
)
872 *checksum
= buf_get_u32(reg_params
[0].value
, 0, 32);
874 LOG_ERROR("error executing cortex_m crc algorithm");
876 destroy_reg_param(®_params
[0]);
877 destroy_reg_param(®_params
[1]);
880 target_free_working_area(target
, crc_algorithm
);
885 /** Checks an array of memory regions whether they are erased. */
886 int armv7m_blank_check_memory(struct target
*target
,
887 struct target_memory_check_block
*blocks
, int num_blocks
, uint8_t erased_value
)
889 struct working_area
*erase_check_algorithm
;
890 struct working_area
*erase_check_params
;
891 struct reg_param reg_params
[2];
892 struct armv7m_algorithm armv7m_info
;
895 static bool timed_out
;
897 static const uint8_t erase_check_code
[] = {
898 #include "../../contrib/loaders/erase_check/armv7m_erase_check.inc"
901 const uint32_t code_size
= sizeof(erase_check_code
);
903 /* make sure we have a working area */
904 if (target_alloc_working_area(target
, code_size
,
905 &erase_check_algorithm
) != ERROR_OK
)
906 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
908 retval
= target_write_buffer(target
, erase_check_algorithm
->address
,
909 code_size
, erase_check_code
);
910 if (retval
!= ERROR_OK
)
913 /* prepare blocks array for algo */
922 uint32_t avail
= target_get_working_area_avail(target
);
923 int blocks_to_check
= avail
/ sizeof(struct algo_block
) - 1;
924 if (num_blocks
< blocks_to_check
)
925 blocks_to_check
= num_blocks
;
927 struct algo_block
*params
= malloc((blocks_to_check
+1)*sizeof(struct algo_block
));
928 if (params
== NULL
) {
934 uint32_t total_size
= 0;
935 for (i
= 0; i
< blocks_to_check
; i
++) {
936 total_size
+= blocks
[i
].size
;
937 target_buffer_set_u32(target
, (uint8_t *)&(params
[i
].size
),
938 blocks
[i
].size
/ sizeof(uint32_t));
939 target_buffer_set_u32(target
, (uint8_t *)&(params
[i
].address
),
942 target_buffer_set_u32(target
, (uint8_t *)&(params
[blocks_to_check
].size
), 0);
944 uint32_t param_size
= (blocks_to_check
+ 1) * sizeof(struct algo_block
);
945 if (target_alloc_working_area(target
, param_size
,
946 &erase_check_params
) != ERROR_OK
) {
947 retval
= ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
951 retval
= target_write_buffer(target
, erase_check_params
->address
,
952 param_size
, (uint8_t *)params
);
953 if (retval
!= ERROR_OK
)
956 uint32_t erased_word
= erased_value
| (erased_value
<< 8)
957 | (erased_value
<< 16) | (erased_value
<< 24);
959 LOG_DEBUG("Starting erase check of %d blocks, parameters@"
960 TARGET_ADDR_FMT
, blocks_to_check
, erase_check_params
->address
);
962 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
963 armv7m_info
.core_mode
= ARM_MODE_THREAD
;
965 init_reg_param(®_params
[0], "r0", 32, PARAM_OUT
);
966 buf_set_u32(reg_params
[0].value
, 0, 32, erase_check_params
->address
);
968 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
969 buf_set_u32(reg_params
[1].value
, 0, 32, erased_word
);
971 /* assume CPU clk at least 1 MHz */
972 int timeout
= (timed_out
? 30000 : 2000) + total_size
* 3 / 1000;
974 retval
= target_run_algorithm(target
,
976 ARRAY_SIZE(reg_params
), reg_params
,
977 erase_check_algorithm
->address
,
978 erase_check_algorithm
->address
+ (code_size
- 2),
982 timed_out
= retval
== ERROR_TARGET_TIMEOUT
;
983 if (retval
!= ERROR_OK
&& !timed_out
)
986 retval
= target_read_buffer(target
, erase_check_params
->address
,
987 param_size
, (uint8_t *)params
);
988 if (retval
!= ERROR_OK
)
991 for (i
= 0; i
< blocks_to_check
; i
++) {
992 uint32_t result
= target_buffer_get_u32(target
,
993 (uint8_t *)&(params
[i
].result
));
994 if (result
!= 0 && result
!= 1)
997 blocks
[i
].result
= result
;
1000 LOG_INFO("Slow CPU clock: %d blocks checked, %d remain. Continuing...", i
, num_blocks
-i
);
1002 retval
= i
; /* return number of blocks really checked */
1005 destroy_reg_param(®_params
[0]);
1006 destroy_reg_param(®_params
[1]);
1009 target_free_working_area(target
, erase_check_params
);
1013 target_free_working_area(target
, erase_check_algorithm
);
1018 int armv7m_maybe_skip_bkpt_inst(struct target
*target
, bool *inst_found
)
1020 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
1021 struct reg
*r
= armv7m
->arm
.pc
;
1022 bool result
= false;
1025 /* if we halted last time due to a bkpt instruction
1026 * then we have to manually step over it, otherwise
1027 * the core will break again */
1029 if (target
->debug_reason
== DBG_REASON_BREAKPOINT
) {
1031 uint32_t pc
= buf_get_u32(r
->value
, 0, 32);
1034 if (target_read_u16(target
, pc
, &op
) == ERROR_OK
) {
1035 if ((op
& 0xFF00) == 0xBE00) {
1036 pc
= buf_get_u32(r
->value
, 0, 32) + 2;
1037 buf_set_u32(r
->value
, 0, 32, pc
);
1041 LOG_DEBUG("Skipping over BKPT instruction");
1047 *inst_found
= result
;
1052 const struct command_registration armv7m_command_handlers
[] = {
1054 .chain
= arm_command_handlers
,
1056 COMMAND_REGISTRATION_DONE
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