1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
8 * Copyright (C) 2008 by Oyvind Harboe *
9 * oyvind.harboe@zylin.com *
11 * Copyright (C) 2018 by Liviu Ionescu *
14 * This program is free software; you can redistribute it and/or modify *
15 * it under the terms of the GNU General Public License as published by *
16 * the Free Software Foundation; either version 2 of the License, or *
17 * (at your option) any later version. *
19 * This program is distributed in the hope that it will be useful, *
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 * GNU General Public License for more details. *
24 * You should have received a copy of the GNU General Public License *
25 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
26 ***************************************************************************/
35 #include "breakpoints.h"
36 #include "arm_disassembler.h"
37 #include <helper/binarybuffer.h>
38 #include "algorithm.h"
40 #include "semihosting_common.h"
42 /* offsets into armv4_5 core register cache */
44 /* ARMV4_5_CPSR = 31, */
45 ARMV4_5_SPSR_FIQ
= 32,
46 ARMV4_5_SPSR_IRQ
= 33,
47 ARMV4_5_SPSR_SVC
= 34,
48 ARMV4_5_SPSR_ABT
= 35,
49 ARMV4_5_SPSR_UND
= 36,
54 static const uint8_t arm_usr_indices
[17] = {
55 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, ARMV4_5_CPSR
,
58 static const uint8_t arm_fiq_indices
[8] = {
59 16, 17, 18, 19, 20, 21, 22, ARMV4_5_SPSR_FIQ
,
62 static const uint8_t arm_irq_indices
[3] = {
63 23, 24, ARMV4_5_SPSR_IRQ
,
66 static const uint8_t arm_svc_indices
[3] = {
67 25, 26, ARMV4_5_SPSR_SVC
,
70 static const uint8_t arm_abt_indices
[3] = {
71 27, 28, ARMV4_5_SPSR_ABT
,
74 static const uint8_t arm_und_indices
[3] = {
75 29, 30, ARMV4_5_SPSR_UND
,
78 static const uint8_t arm_mon_indices
[3] = {
82 static const uint8_t arm_hyp_indices
[2] = {
89 /* For user and system modes, these list indices for all registers.
90 * otherwise they're just indices for the shadow registers and SPSR.
92 unsigned short n_indices
;
93 const uint8_t *indices
;
95 /* Seven modes are standard from ARM7 on. "System" and "User" share
96 * the same registers; other modes shadow from 3 to 8 registers.
101 .n_indices
= ARRAY_SIZE(arm_usr_indices
),
102 .indices
= arm_usr_indices
,
107 .n_indices
= ARRAY_SIZE(arm_fiq_indices
),
108 .indices
= arm_fiq_indices
,
111 .name
= "Supervisor",
113 .n_indices
= ARRAY_SIZE(arm_svc_indices
),
114 .indices
= arm_svc_indices
,
119 .n_indices
= ARRAY_SIZE(arm_abt_indices
),
120 .indices
= arm_abt_indices
,
125 .n_indices
= ARRAY_SIZE(arm_irq_indices
),
126 .indices
= arm_irq_indices
,
129 .name
= "Undefined instruction",
131 .n_indices
= ARRAY_SIZE(arm_und_indices
),
132 .indices
= arm_und_indices
,
137 .n_indices
= ARRAY_SIZE(arm_usr_indices
),
138 .indices
= arm_usr_indices
,
140 /* TrustZone "Security Extensions" add a secure monitor mode.
141 * This is distinct from a "debug monitor" which can support
142 * non-halting debug, in conjunction with some debuggers.
145 .name
= "Secure Monitor",
147 .n_indices
= ARRAY_SIZE(arm_mon_indices
),
148 .indices
= arm_mon_indices
,
151 .name
= "Secure Monitor ARM1176JZF-S",
152 .psr
= ARM_MODE_1176_MON
,
153 .n_indices
= ARRAY_SIZE(arm_mon_indices
),
154 .indices
= arm_mon_indices
,
157 /* These special modes are currently only supported
158 * by ARMv6M and ARMv7M profiles */
161 .psr
= ARM_MODE_THREAD
,
164 .name
= "Thread (User)",
165 .psr
= ARM_MODE_USER_THREAD
,
169 .psr
= ARM_MODE_HANDLER
,
172 /* armv7-a with virtualization extension */
174 .name
= "Hypervisor",
176 .n_indices
= ARRAY_SIZE(arm_hyp_indices
),
177 .indices
= arm_hyp_indices
,
181 /** Map PSR mode bits to the name of an ARM processor operating mode. */
182 const char *arm_mode_name(unsigned psr_mode
)
184 for (unsigned i
= 0; i
< ARRAY_SIZE(arm_mode_data
); i
++) {
185 if (arm_mode_data
[i
].psr
== psr_mode
)
186 return arm_mode_data
[i
].name
;
188 LOG_ERROR("unrecognized psr mode: %#02x", psr_mode
);
189 return "UNRECOGNIZED";
192 /** Return true iff the parameter denotes a valid ARM processor mode. */
193 bool is_arm_mode(unsigned psr_mode
)
195 for (unsigned i
= 0; i
< ARRAY_SIZE(arm_mode_data
); i
++) {
196 if (arm_mode_data
[i
].psr
== psr_mode
)
202 /** Map PSR mode bits to linear number indexing armv4_5_core_reg_map */
203 int arm_mode_to_number(enum arm_mode mode
)
207 /* map MODE_ANY to user mode */
223 case ARM_MODE_1176_MON
:
228 LOG_ERROR("invalid mode value encountered %d", mode
);
233 /** Map linear number indexing armv4_5_core_reg_map to PSR mode bits. */
234 enum arm_mode
armv4_5_number_to_mode(int number
)
256 LOG_ERROR("mode index out of bounds %d", number
);
261 static const char *arm_state_strings
[] = {
262 "ARM", "Thumb", "Jazelle", "ThumbEE",
265 /* Templates for ARM core registers.
267 * NOTE: offsets in this table are coupled to the arm_mode_data
268 * table above, the armv4_5_core_reg_map array below, and also to
269 * the ARMV4_5_CPSR symbol (which should vanish after ARM11 updates).
271 static const struct {
272 /* The name is used for e.g. the "regs" command. */
275 /* The {cookie, mode} tuple uniquely identifies one register.
276 * In a given mode, cookies 0..15 map to registers R0..R15,
277 * with R13..R15 usually called SP, LR, PC.
279 * MODE_ANY is used as *input* to the mapping, and indicates
280 * various special cases (sigh) and errors.
282 * Cookie 16 is (currently) confusing, since it indicates
283 * CPSR -or- SPSR depending on whether 'mode' is MODE_ANY.
284 * (Exception modes have both CPSR and SPSR registers ...)
289 } arm_core_regs
[] = {
290 /* IMPORTANT: we guarantee that the first eight cached registers
291 * correspond to r0..r7, and the fifteenth to PC, so that callers
292 * don't need to map them.
294 [0] = { .name
= "r0", .cookie
= 0, .mode
= ARM_MODE_ANY
, .gdb_index
= 0, },
295 [1] = { .name
= "r1", .cookie
= 1, .mode
= ARM_MODE_ANY
, .gdb_index
= 1, },
296 [2] = { .name
= "r2", .cookie
= 2, .mode
= ARM_MODE_ANY
, .gdb_index
= 2, },
297 [3] = { .name
= "r3", .cookie
= 3, .mode
= ARM_MODE_ANY
, .gdb_index
= 3, },
298 [4] = { .name
= "r4", .cookie
= 4, .mode
= ARM_MODE_ANY
, .gdb_index
= 4, },
299 [5] = { .name
= "r5", .cookie
= 5, .mode
= ARM_MODE_ANY
, .gdb_index
= 5, },
300 [6] = { .name
= "r6", .cookie
= 6, .mode
= ARM_MODE_ANY
, .gdb_index
= 6, },
301 [7] = { .name
= "r7", .cookie
= 7, .mode
= ARM_MODE_ANY
, .gdb_index
= 7, },
303 /* NOTE: regs 8..12 might be shadowed by FIQ ... flagging
304 * them as MODE_ANY creates special cases. (ANY means
305 * "not mapped" elsewhere; here it's "everything but FIQ".)
307 [8] = { .name
= "r8", .cookie
= 8, .mode
= ARM_MODE_ANY
, .gdb_index
= 8, },
308 [9] = { .name
= "r9", .cookie
= 9, .mode
= ARM_MODE_ANY
, .gdb_index
= 9, },
309 [10] = { .name
= "r10", .cookie
= 10, .mode
= ARM_MODE_ANY
, .gdb_index
= 10, },
310 [11] = { .name
= "r11", .cookie
= 11, .mode
= ARM_MODE_ANY
, .gdb_index
= 11, },
311 [12] = { .name
= "r12", .cookie
= 12, .mode
= ARM_MODE_ANY
, .gdb_index
= 12, },
313 /* Historical GDB mapping of indices:
314 * - 13-14 are sp and lr, but banked counterparts are used
315 * - 16-24 are left for deprecated 8 FPA + 1 FPS
319 /* NOTE all MODE_USR registers are equivalent to MODE_SYS ones */
320 [13] = { .name
= "sp_usr", .cookie
= 13, .mode
= ARM_MODE_USR
, .gdb_index
= 26, },
321 [14] = { .name
= "lr_usr", .cookie
= 14, .mode
= ARM_MODE_USR
, .gdb_index
= 27, },
323 /* guaranteed to be at index 15 */
324 [15] = { .name
= "pc", .cookie
= 15, .mode
= ARM_MODE_ANY
, .gdb_index
= 15, },
325 [16] = { .name
= "r8_fiq", .cookie
= 8, .mode
= ARM_MODE_FIQ
, .gdb_index
= 28, },
326 [17] = { .name
= "r9_fiq", .cookie
= 9, .mode
= ARM_MODE_FIQ
, .gdb_index
= 29, },
327 [18] = { .name
= "r10_fiq", .cookie
= 10, .mode
= ARM_MODE_FIQ
, .gdb_index
= 30, },
328 [19] = { .name
= "r11_fiq", .cookie
= 11, .mode
= ARM_MODE_FIQ
, .gdb_index
= 31, },
329 [20] = { .name
= "r12_fiq", .cookie
= 12, .mode
= ARM_MODE_FIQ
, .gdb_index
= 32, },
331 [21] = { .name
= "sp_fiq", .cookie
= 13, .mode
= ARM_MODE_FIQ
, .gdb_index
= 33, },
332 [22] = { .name
= "lr_fiq", .cookie
= 14, .mode
= ARM_MODE_FIQ
, .gdb_index
= 34, },
334 [23] = { .name
= "sp_irq", .cookie
= 13, .mode
= ARM_MODE_IRQ
, .gdb_index
= 35, },
335 [24] = { .name
= "lr_irq", .cookie
= 14, .mode
= ARM_MODE_IRQ
, .gdb_index
= 36, },
337 [25] = { .name
= "sp_svc", .cookie
= 13, .mode
= ARM_MODE_SVC
, .gdb_index
= 37, },
338 [26] = { .name
= "lr_svc", .cookie
= 14, .mode
= ARM_MODE_SVC
, .gdb_index
= 38, },
340 [27] = { .name
= "sp_abt", .cookie
= 13, .mode
= ARM_MODE_ABT
, .gdb_index
= 39, },
341 [28] = { .name
= "lr_abt", .cookie
= 14, .mode
= ARM_MODE_ABT
, .gdb_index
= 40, },
343 [29] = { .name
= "sp_und", .cookie
= 13, .mode
= ARM_MODE_UND
, .gdb_index
= 41, },
344 [30] = { .name
= "lr_und", .cookie
= 14, .mode
= ARM_MODE_UND
, .gdb_index
= 42, },
346 [31] = { .name
= "cpsr", .cookie
= 16, .mode
= ARM_MODE_ANY
, .gdb_index
= 25, },
347 [32] = { .name
= "spsr_fiq", .cookie
= 16, .mode
= ARM_MODE_FIQ
, .gdb_index
= 43, },
348 [33] = { .name
= "spsr_irq", .cookie
= 16, .mode
= ARM_MODE_IRQ
, .gdb_index
= 44, },
349 [34] = { .name
= "spsr_svc", .cookie
= 16, .mode
= ARM_MODE_SVC
, .gdb_index
= 45, },
350 [35] = { .name
= "spsr_abt", .cookie
= 16, .mode
= ARM_MODE_ABT
, .gdb_index
= 46, },
351 [36] = { .name
= "spsr_und", .cookie
= 16, .mode
= ARM_MODE_UND
, .gdb_index
= 47, },
353 /* These are only used for GDB target description, banked registers are accessed instead */
354 [37] = { .name
= "sp", .cookie
= 13, .mode
= ARM_MODE_ANY
, .gdb_index
= 13, },
355 [38] = { .name
= "lr", .cookie
= 14, .mode
= ARM_MODE_ANY
, .gdb_index
= 14, },
357 /* These exist only when the Security Extension (TrustZone) is present */
358 [39] = { .name
= "sp_mon", .cookie
= 13, .mode
= ARM_MODE_MON
, .gdb_index
= 48, },
359 [40] = { .name
= "lr_mon", .cookie
= 14, .mode
= ARM_MODE_MON
, .gdb_index
= 49, },
360 [41] = { .name
= "spsr_mon", .cookie
= 16, .mode
= ARM_MODE_MON
, .gdb_index
= 50, },
362 /* These exist only when the Virtualization Extensions is present */
363 [42] = { .name
= "sp_hyp", .cookie
= 13, .mode
= ARM_MODE_HYP
, .gdb_index
= 51, },
364 [43] = { .name
= "spsr_hyp", .cookie
= 16, .mode
= ARM_MODE_HYP
, .gdb_index
= 52, },
367 static const struct {
375 } arm_vfp_v3_regs
[] = {
376 { ARM_VFP_V3_D0
, "d0", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
377 { ARM_VFP_V3_D1
, "d1", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
378 { ARM_VFP_V3_D2
, "d2", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
379 { ARM_VFP_V3_D3
, "d3", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
380 { ARM_VFP_V3_D4
, "d4", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
381 { ARM_VFP_V3_D5
, "d5", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
382 { ARM_VFP_V3_D6
, "d6", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
383 { ARM_VFP_V3_D7
, "d7", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
384 { ARM_VFP_V3_D8
, "d8", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
385 { ARM_VFP_V3_D9
, "d9", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
386 { ARM_VFP_V3_D10
, "d10", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
387 { ARM_VFP_V3_D11
, "d11", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
388 { ARM_VFP_V3_D12
, "d12", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
389 { ARM_VFP_V3_D13
, "d13", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
390 { ARM_VFP_V3_D14
, "d14", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
391 { ARM_VFP_V3_D15
, "d15", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
392 { ARM_VFP_V3_D16
, "d16", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
393 { ARM_VFP_V3_D17
, "d17", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
394 { ARM_VFP_V3_D18
, "d18", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
395 { ARM_VFP_V3_D19
, "d19", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
396 { ARM_VFP_V3_D20
, "d20", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
397 { ARM_VFP_V3_D21
, "d21", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
398 { ARM_VFP_V3_D22
, "d22", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
399 { ARM_VFP_V3_D23
, "d23", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
400 { ARM_VFP_V3_D24
, "d24", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
401 { ARM_VFP_V3_D25
, "d25", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
402 { ARM_VFP_V3_D26
, "d26", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
403 { ARM_VFP_V3_D27
, "d27", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
404 { ARM_VFP_V3_D28
, "d28", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
405 { ARM_VFP_V3_D29
, "d29", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
406 { ARM_VFP_V3_D30
, "d30", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
407 { ARM_VFP_V3_D31
, "d31", 64, ARM_MODE_ANY
, REG_TYPE_IEEE_DOUBLE
, NULL
, "org.gnu.gdb.arm.vfp"},
408 { ARM_VFP_V3_FPSCR
, "fpscr", 32, ARM_MODE_ANY
, REG_TYPE_INT
, "float", "org.gnu.gdb.arm.vfp"},
411 /* map core mode (USR, FIQ, ...) and register number to
412 * indices into the register cache
414 const int armv4_5_core_reg_map
[9][17] = {
416 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
418 { /* FIQ (8 shadows of USR, vs normal 3) */
419 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 15, 32
422 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 15, 33
425 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 15, 34
428 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 27, 28, 15, 35
431 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 15, 36
433 { /* SYS (same registers as USR) */
434 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
437 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 39, 40, 15, 41,
440 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 42, 14, 15, 43,
445 * Configures host-side ARM records to reflect the specified CPSR.
446 * Later, code can use arm_reg_current() to map register numbers
447 * according to how they are exposed by this mode.
449 void arm_set_cpsr(struct arm
*arm
, uint32_t cpsr
)
451 enum arm_mode mode
= cpsr
& 0x1f;
454 /* NOTE: this may be called very early, before the register
455 * cache is set up. We can't defend against many errors, in
456 * particular against CPSRs that aren't valid *here* ...
459 buf_set_u32(arm
->cpsr
->value
, 0, 32, cpsr
);
460 arm
->cpsr
->valid
= true;
461 arm
->cpsr
->dirty
= false;
464 arm
->core_mode
= mode
;
466 /* mode_to_number() warned; set up a somewhat-sane mapping */
467 num
= arm_mode_to_number(mode
);
473 arm
->map
= &armv4_5_core_reg_map
[num
][0];
474 arm
->spsr
= (mode
== ARM_MODE_USR
|| mode
== ARM_MODE_SYS
)
476 : arm
->core_cache
->reg_list
+ arm
->map
[16];
478 /* Older ARMs won't have the J bit */
479 enum arm_state state
;
481 if (cpsr
& (1 << 5)) { /* T */
482 if (cpsr
& (1 << 24)) { /* J */
483 LOG_WARNING("ThumbEE -- incomplete support");
484 state
= ARM_STATE_THUMB_EE
;
486 state
= ARM_STATE_THUMB
;
488 if (cpsr
& (1 << 24)) { /* J */
489 LOG_ERROR("Jazelle state handling is BROKEN!");
490 state
= ARM_STATE_JAZELLE
;
492 state
= ARM_STATE_ARM
;
494 arm
->core_state
= state
;
496 LOG_DEBUG("set CPSR %#8.8x: %s mode, %s state", (unsigned) cpsr
,
498 arm_state_strings
[arm
->core_state
]);
502 * Returns handle to the register currently mapped to a given number.
503 * Someone must have called arm_set_cpsr() before.
505 * \param arm This core's state and registers are used.
506 * \param regnum From 0..15 corresponding to R0..R14 and PC.
507 * Note that R0..R7 don't require mapping; you may access those
508 * as the first eight entries in the register cache. Likewise
509 * R15 (PC) doesn't need mapping; you may also access it directly.
510 * However, R8..R14, and SPSR (arm->spsr) *must* be mapped.
511 * CPSR (arm->cpsr) is also not mapped.
513 struct reg
*arm_reg_current(struct arm
*arm
, unsigned regnum
)
521 LOG_ERROR("Register map is not available yet, the target is not fully initialised");
522 r
= arm
->core_cache
->reg_list
+ regnum
;
524 r
= arm
->core_cache
->reg_list
+ arm
->map
[regnum
];
526 /* e.g. invalid CPSR said "secure monitor" mode on a core
527 * that doesn't support it...
530 LOG_ERROR("Invalid CPSR mode");
531 r
= arm
->core_cache
->reg_list
+ regnum
;
537 static const uint8_t arm_gdb_dummy_fp_value
[12];
539 static struct reg_feature arm_gdb_dummy_fp_features
= {
540 .name
= "net.sourceforge.openocd.fake_fpa"
544 * Dummy FPA registers are required to support GDB on ARM.
545 * Register packets require eight obsolete FPA register values.
546 * Modern ARM cores use Vector Floating Point (VFP), if they
547 * have any floating point support. VFP is not FPA-compatible.
549 struct reg arm_gdb_dummy_fp_reg
= {
550 .name
= "GDB dummy FPA register",
551 .value
= (uint8_t *) arm_gdb_dummy_fp_value
,
556 .feature
= &arm_gdb_dummy_fp_features
,
560 static const uint8_t arm_gdb_dummy_fps_value
[4];
563 * Dummy FPA status registers are required to support GDB on ARM.
564 * Register packets require an obsolete FPA status register.
566 struct reg arm_gdb_dummy_fps_reg
= {
567 .name
= "GDB dummy FPA status register",
568 .value
= (uint8_t *) arm_gdb_dummy_fps_value
,
573 .feature
= &arm_gdb_dummy_fp_features
,
577 static void arm_gdb_dummy_init(void) __attribute__ ((constructor
));
579 static void arm_gdb_dummy_init(void)
581 register_init_dummy(&arm_gdb_dummy_fp_reg
);
582 register_init_dummy(&arm_gdb_dummy_fps_reg
);
585 static int armv4_5_get_core_reg(struct reg
*reg
)
588 struct arm_reg
*reg_arch_info
= reg
->arch_info
;
589 struct target
*target
= reg_arch_info
->target
;
591 if (target
->state
!= TARGET_HALTED
) {
592 LOG_ERROR("Target not halted");
593 return ERROR_TARGET_NOT_HALTED
;
596 retval
= reg_arch_info
->arm
->read_core_reg(target
, reg
,
597 reg_arch_info
->num
, reg_arch_info
->mode
);
598 if (retval
== ERROR_OK
) {
606 static int armv4_5_set_core_reg(struct reg
*reg
, uint8_t *buf
)
608 struct arm_reg
*reg_arch_info
= reg
->arch_info
;
609 struct target
*target
= reg_arch_info
->target
;
610 struct arm
*armv4_5_target
= target_to_arm(target
);
611 uint32_t value
= buf_get_u32(buf
, 0, 32);
613 if (target
->state
!= TARGET_HALTED
) {
614 LOG_ERROR("Target not halted");
615 return ERROR_TARGET_NOT_HALTED
;
618 /* Except for CPSR, the "reg" command exposes a writeback model
619 * for the register cache.
621 if (reg
== armv4_5_target
->cpsr
) {
622 arm_set_cpsr(armv4_5_target
, value
);
624 /* Older cores need help to be in ARM mode during halt
625 * mode debug, so we clear the J and T bits if we flush.
626 * For newer cores (v6/v7a/v7r) we don't need that, but
627 * it won't hurt since CPSR is always flushed anyway.
629 if (armv4_5_target
->core_mode
!=
630 (enum arm_mode
)(value
& 0x1f)) {
631 LOG_DEBUG("changing ARM core mode to '%s'",
632 arm_mode_name(value
& 0x1f));
633 value
&= ~((1 << 24) | (1 << 5));
635 buf_set_u32(t
, 0, 32, value
);
636 armv4_5_target
->write_core_reg(target
, reg
,
637 16, ARM_MODE_ANY
, t
);
640 buf_set_u32(reg
->value
, 0, 32, value
);
641 if (reg
->size
== 64) {
642 value
= buf_get_u32(buf
+ 4, 0, 32);
643 buf_set_u32(reg
->value
+ 4, 0, 32, value
);
652 static const struct reg_arch_type arm_reg_type
= {
653 .get
= armv4_5_get_core_reg
,
654 .set
= armv4_5_set_core_reg
,
657 struct reg_cache
*arm_build_reg_cache(struct target
*target
, struct arm
*arm
)
659 int num_regs
= ARRAY_SIZE(arm_core_regs
);
660 int num_core_regs
= num_regs
;
661 if (arm
->arm_vfp_version
== ARM_VFP_V3
)
662 num_regs
+= ARRAY_SIZE(arm_vfp_v3_regs
);
664 struct reg_cache
*cache
= malloc(sizeof(struct reg_cache
));
665 struct reg
*reg_list
= calloc(num_regs
, sizeof(struct reg
));
666 struct arm_reg
*reg_arch_info
= calloc(num_regs
, sizeof(struct arm_reg
));
669 if (!cache
|| !reg_list
|| !reg_arch_info
) {
676 cache
->name
= "ARM registers";
678 cache
->reg_list
= reg_list
;
681 for (i
= 0; i
< num_core_regs
; i
++) {
682 /* Skip registers this core doesn't expose */
683 if (arm_core_regs
[i
].mode
== ARM_MODE_MON
684 && arm
->core_type
!= ARM_CORE_TYPE_SEC_EXT
685 && arm
->core_type
!= ARM_CORE_TYPE_VIRT_EXT
)
687 if (arm_core_regs
[i
].mode
== ARM_MODE_HYP
688 && arm
->core_type
!= ARM_CORE_TYPE_VIRT_EXT
)
691 /* REVISIT handle Cortex-M, which only shadows R13/SP */
693 reg_arch_info
[i
].num
= arm_core_regs
[i
].cookie
;
694 reg_arch_info
[i
].mode
= arm_core_regs
[i
].mode
;
695 reg_arch_info
[i
].target
= target
;
696 reg_arch_info
[i
].arm
= arm
;
698 reg_list
[i
].name
= arm_core_regs
[i
].name
;
699 reg_list
[i
].number
= arm_core_regs
[i
].gdb_index
;
700 reg_list
[i
].size
= 32;
701 reg_list
[i
].value
= reg_arch_info
[i
].value
;
702 reg_list
[i
].type
= &arm_reg_type
;
703 reg_list
[i
].arch_info
= ®_arch_info
[i
];
704 reg_list
[i
].exist
= true;
706 /* This really depends on the calling convention in use */
707 reg_list
[i
].caller_save
= false;
709 /* Registers data type, as used by GDB target description */
710 reg_list
[i
].reg_data_type
= malloc(sizeof(struct reg_data_type
));
711 switch (arm_core_regs
[i
].cookie
) {
713 reg_list
[i
].reg_data_type
->type
= REG_TYPE_DATA_PTR
;
717 reg_list
[i
].reg_data_type
->type
= REG_TYPE_CODE_PTR
;
720 reg_list
[i
].reg_data_type
->type
= REG_TYPE_UINT32
;
724 /* let GDB shows banked registers only in "info all-reg" */
725 reg_list
[i
].feature
= malloc(sizeof(struct reg_feature
));
726 if (reg_list
[i
].number
<= 15 || reg_list
[i
].number
== 25) {
727 reg_list
[i
].feature
->name
= "org.gnu.gdb.arm.core";
728 reg_list
[i
].group
= "general";
730 reg_list
[i
].feature
->name
= "net.sourceforge.openocd.banked";
731 reg_list
[i
].group
= "banked";
738 for (i
= num_core_regs
, j
= 0; i
< num_regs
; i
++, j
++) {
739 reg_arch_info
[i
].num
= arm_vfp_v3_regs
[j
].id
;
740 reg_arch_info
[i
].mode
= arm_vfp_v3_regs
[j
].mode
;
741 reg_arch_info
[i
].target
= target
;
742 reg_arch_info
[i
].arm
= arm
;
744 reg_list
[i
].name
= arm_vfp_v3_regs
[j
].name
;
745 reg_list
[i
].number
= arm_vfp_v3_regs
[j
].id
;
746 reg_list
[i
].size
= arm_vfp_v3_regs
[j
].bits
;
747 reg_list
[i
].value
= reg_arch_info
[i
].value
;
748 reg_list
[i
].type
= &arm_reg_type
;
749 reg_list
[i
].arch_info
= ®_arch_info
[i
];
750 reg_list
[i
].exist
= true;
752 reg_list
[i
].caller_save
= false;
754 reg_list
[i
].reg_data_type
= malloc(sizeof(struct reg_data_type
));
755 reg_list
[i
].reg_data_type
->type
= arm_vfp_v3_regs
[j
].type
;
757 reg_list
[i
].feature
= malloc(sizeof(struct reg_feature
));
758 reg_list
[i
].feature
->name
= arm_vfp_v3_regs
[j
].feature
;
760 reg_list
[i
].group
= arm_vfp_v3_regs
[j
].group
;
765 arm
->pc
= reg_list
+ 15;
766 arm
->cpsr
= reg_list
+ ARMV4_5_CPSR
;
767 arm
->core_cache
= cache
;
772 void arm_free_reg_cache(struct arm
*arm
)
774 if (!arm
|| !arm
->core_cache
)
777 struct reg_cache
*cache
= arm
->core_cache
;
779 for (unsigned int i
= 0; i
< cache
->num_regs
; i
++) {
780 struct reg
*reg
= &cache
->reg_list
[i
];
783 free(reg
->reg_data_type
);
786 free(cache
->reg_list
[0].arch_info
);
787 free(cache
->reg_list
);
790 arm
->core_cache
= NULL
;
793 int arm_arch_state(struct target
*target
)
795 struct arm
*arm
= target_to_arm(target
);
797 if (arm
->common_magic
!= ARM_COMMON_MAGIC
) {
798 LOG_ERROR("BUG: called for a non-ARM target");
802 /* avoid filling log waiting for fileio reply */
803 if (target
->semihosting
&& target
->semihosting
->hit_fileio
)
806 LOG_USER("target halted in %s state due to %s, current mode: %s\n"
807 "cpsr: 0x%8.8" PRIx32
" pc: 0x%8.8" PRIx32
"%s%s",
808 arm_state_strings
[arm
->core_state
],
809 debug_reason_name(target
),
810 arm_mode_name(arm
->core_mode
),
811 buf_get_u32(arm
->cpsr
->value
, 0, 32),
812 buf_get_u32(arm
->pc
->value
, 0, 32),
813 (target
->semihosting
&& target
->semihosting
->is_active
) ? ", semihosting" : "",
814 (target
->semihosting
&& target
->semihosting
->is_fileio
) ? " fileio" : "");
819 COMMAND_HANDLER(handle_armv4_5_reg_command
)
821 struct target
*target
= get_current_target(CMD_CTX
);
822 struct arm
*arm
= target_to_arm(target
);
826 command_print(CMD
, "current target isn't an ARM");
830 if (target
->state
!= TARGET_HALTED
) {
831 command_print(CMD
, "error: target must be halted for register accesses");
835 if (arm
->core_type
!= ARM_CORE_TYPE_STD
) {
837 "Microcontroller Profile not supported - use standard reg cmd");
841 if (!is_arm_mode(arm
->core_mode
)) {
842 LOG_ERROR("not a valid arm core mode - communication failure?");
846 if (!arm
->full_context
) {
847 command_print(CMD
, "error: target doesn't support %s",
852 regs
= arm
->core_cache
->reg_list
;
854 for (unsigned mode
= 0; mode
< ARRAY_SIZE(arm_mode_data
); mode
++) {
859 if (!arm_mode_data
[mode
].n_indices
)
862 /* label this bank of registers (or shadows) */
863 switch (arm_mode_data
[mode
].psr
) {
867 name
= "System and User";
871 if (arm
->core_type
!= ARM_CORE_TYPE_VIRT_EXT
)
875 case ARM_MODE_1176_MON
:
876 if (arm
->core_type
!= ARM_CORE_TYPE_SEC_EXT
877 && arm
->core_type
!= ARM_CORE_TYPE_VIRT_EXT
)
881 name
= arm_mode_data
[mode
].name
;
885 command_print(CMD
, "%s%s mode %sregisters",
888 /* display N rows of up to 4 registers each */
889 for (unsigned i
= 0; i
< arm_mode_data
[mode
].n_indices
; ) {
893 for (unsigned j
= 0; j
< 4; j
++, i
++) {
895 struct reg
*reg
= regs
;
897 if (i
>= arm_mode_data
[mode
].n_indices
)
900 reg
+= arm_mode_data
[mode
].indices
[i
];
902 /* REVISIT be smarter about faults... */
904 arm
->full_context(target
);
906 value
= buf_get_u32(reg
->value
, 0, 32);
907 output_len
+= snprintf(output
+ output_len
,
908 sizeof(output
) - output_len
,
909 "%8s: %8.8" PRIx32
" ",
912 command_print(CMD
, "%s", output
);
919 COMMAND_HANDLER(handle_armv4_5_core_state_command
)
921 struct target
*target
= get_current_target(CMD_CTX
);
922 struct arm
*arm
= target_to_arm(target
);
925 command_print(CMD
, "current target isn't an ARM");
929 if (arm
->core_type
== ARM_CORE_TYPE_M_PROFILE
) {
930 /* armv7m not supported */
931 command_print(CMD
, "Unsupported Command");
936 if (strcmp(CMD_ARGV
[0], "arm") == 0)
937 arm
->core_state
= ARM_STATE_ARM
;
938 if (strcmp(CMD_ARGV
[0], "thumb") == 0)
939 arm
->core_state
= ARM_STATE_THUMB
;
942 command_print(CMD
, "core state: %s", arm_state_strings
[arm
->core_state
]);
947 COMMAND_HANDLER(handle_arm_disassemble_command
)
950 struct target
*target
= get_current_target(CMD_CTX
);
952 if (target
== NULL
) {
953 LOG_ERROR("No target selected");
957 struct arm
*arm
= target_to_arm(target
);
958 target_addr_t address
;
959 unsigned int count
= 1;
963 command_print(CMD
, "current target isn't an ARM");
967 if (arm
->core_type
== ARM_CORE_TYPE_M_PROFILE
) {
968 /* armv7m is always thumb mode */
974 if (strcmp(CMD_ARGV
[2], "thumb") != 0)
975 return ERROR_COMMAND_SYNTAX_ERROR
;
979 COMMAND_PARSE_NUMBER(uint
, CMD_ARGV
[1], count
);
982 COMMAND_PARSE_ADDRESS(CMD_ARGV
[0], address
);
983 if (address
& 0x01) {
985 command_print(CMD
, "Disassemble as Thumb");
992 return ERROR_COMMAND_SYNTAX_ERROR
;
995 return arm_disassemble(CMD
, target
, address
, count
, thumb
);
997 command_print(CMD
, "capstone disassembly framework required");
1002 static int jim_mcrmrc(Jim_Interp
*interp
, int argc
, Jim_Obj
* const *argv
)
1004 struct command_context
*context
;
1005 struct target
*target
;
1009 context
= current_command_context(interp
);
1010 assert(context
!= NULL
);
1012 target
= get_current_target(context
);
1013 if (target
== NULL
) {
1014 LOG_ERROR("%s: no current target", __func__
);
1017 if (!target_was_examined(target
)) {
1018 LOG_ERROR("%s: not yet examined", target_name(target
));
1021 arm
= target_to_arm(target
);
1023 LOG_ERROR("%s: not an ARM", target_name(target
));
1027 if ((argc
< 6) || (argc
> 7)) {
1028 /* FIXME use the command name to verify # params... */
1029 LOG_ERROR("%s: wrong number of arguments", __func__
);
1041 /* NOTE: parameter sequence matches ARM instruction set usage:
1042 * MCR pNUM, op1, rX, CRn, CRm, op2 ; write CP from rX
1043 * MRC pNUM, op1, rX, CRn, CRm, op2 ; read CP into rX
1044 * The "rX" is necessarily omitted; it uses Tcl mechanisms.
1046 retval
= Jim_GetLong(interp
, argv
[1], &l
);
1047 if (retval
!= JIM_OK
)
1050 LOG_ERROR("%s: %s %d out of range", __func__
,
1051 "coprocessor", (int) l
);
1056 retval
= Jim_GetLong(interp
, argv
[2], &l
);
1057 if (retval
!= JIM_OK
)
1060 LOG_ERROR("%s: %s %d out of range", __func__
,
1066 retval
= Jim_GetLong(interp
, argv
[3], &l
);
1067 if (retval
!= JIM_OK
)
1070 LOG_ERROR("%s: %s %d out of range", __func__
,
1076 retval
= Jim_GetLong(interp
, argv
[4], &l
);
1077 if (retval
!= JIM_OK
)
1080 LOG_ERROR("%s: %s %d out of range", __func__
,
1086 retval
= Jim_GetLong(interp
, argv
[5], &l
);
1087 if (retval
!= JIM_OK
)
1090 LOG_ERROR("%s: %s %d out of range", __func__
,
1098 /* FIXME don't assume "mrc" vs "mcr" from the number of params;
1099 * that could easily be a typo! Check both...
1101 * FIXME change the call syntax here ... simplest to just pass
1102 * the MRC() or MCR() instruction to be executed. That will also
1103 * let us support the "mrc2" and "mcr2" opcodes (toggling one bit)
1104 * if that's ever needed.
1107 retval
= Jim_GetLong(interp
, argv
[6], &l
);
1108 if (retval
!= JIM_OK
)
1112 /* NOTE: parameters reordered! */
1113 /* ARMV4_5_MCR(cpnum, op1, 0, CRn, CRm, op2) */
1114 retval
= arm
->mcr(target
, cpnum
, op1
, op2
, CRn
, CRm
, value
);
1115 if (retval
!= ERROR_OK
)
1118 /* NOTE: parameters reordered! */
1119 /* ARMV4_5_MRC(cpnum, op1, 0, CRn, CRm, op2) */
1120 retval
= arm
->mrc(target
, cpnum
, op1
, op2
, CRn
, CRm
, &value
);
1121 if (retval
!= ERROR_OK
)
1124 Jim_SetResult(interp
, Jim_NewIntObj(interp
, value
));
1130 extern const struct command_registration semihosting_common_handlers
[];
1132 static const struct command_registration arm_exec_command_handlers
[] = {
1135 .handler
= handle_armv4_5_reg_command
,
1136 .mode
= COMMAND_EXEC
,
1137 .help
= "display ARM core registers",
1141 .name
= "core_state",
1142 .handler
= handle_armv4_5_core_state_command
,
1143 .mode
= COMMAND_EXEC
,
1144 .usage
= "['arm'|'thumb']",
1145 .help
= "display/change ARM core state",
1148 .name
= "disassemble",
1149 .handler
= handle_arm_disassemble_command
,
1150 .mode
= COMMAND_EXEC
,
1151 .usage
= "address [count ['thumb']]",
1152 .help
= "disassemble instructions",
1156 .mode
= COMMAND_EXEC
,
1157 .jim_handler
= &jim_mcrmrc
,
1158 .help
= "write coprocessor register",
1159 .usage
= "cpnum op1 CRn CRm op2 value",
1163 .mode
= COMMAND_EXEC
,
1164 .jim_handler
= &jim_mcrmrc
,
1165 .help
= "read coprocessor register",
1166 .usage
= "cpnum op1 CRn CRm op2",
1169 .chain
= semihosting_common_handlers
,
1171 COMMAND_REGISTRATION_DONE
1173 const struct command_registration arm_command_handlers
[] = {
1176 .mode
= COMMAND_ANY
,
1177 .help
= "ARM command group",
1179 .chain
= arm_exec_command_handlers
,
1181 COMMAND_REGISTRATION_DONE
1185 * gdb for arm targets (e.g. arm-none-eabi-gdb) supports several variants
1186 * of arm architecture. You can list them using the autocompletion of gdb
1187 * command prompt by typing "set architecture " and then press TAB key.
1188 * The default, selected automatically, is "arm".
1189 * Let's use the default value, here, to make gdb-multiarch behave in the
1190 * same way as a gdb for arm. This can be changed later on. User can still
1191 * set the specific architecture variant with the gdb command.
1193 const char *arm_get_gdb_arch(struct target
*target
)
1198 int arm_get_gdb_reg_list(struct target
*target
,
1199 struct reg
**reg_list
[], int *reg_list_size
,
1200 enum target_register_class reg_class
)
1202 struct arm
*arm
= target_to_arm(target
);
1205 if (!is_arm_mode(arm
->core_mode
)) {
1206 LOG_ERROR("not a valid arm core mode - communication failure?");
1210 switch (reg_class
) {
1211 case REG_CLASS_GENERAL
:
1212 *reg_list_size
= 26;
1213 *reg_list
= malloc(sizeof(struct reg
*) * (*reg_list_size
));
1215 for (i
= 0; i
< 16; i
++)
1216 (*reg_list
)[i
] = arm_reg_current(arm
, i
);
1218 /* For GDB compatibility, take FPA registers size into account and zero-fill it*/
1219 for (i
= 16; i
< 24; i
++)
1220 (*reg_list
)[i
] = &arm_gdb_dummy_fp_reg
;
1221 (*reg_list
)[24] = &arm_gdb_dummy_fps_reg
;
1223 (*reg_list
)[25] = arm
->cpsr
;
1228 switch (arm
->core_type
) {
1229 case ARM_CORE_TYPE_SEC_EXT
:
1230 *reg_list_size
= 51;
1232 case ARM_CORE_TYPE_VIRT_EXT
:
1233 *reg_list_size
= 53;
1236 *reg_list_size
= 48;
1238 unsigned int list_size_core
= *reg_list_size
;
1239 if (arm
->arm_vfp_version
== ARM_VFP_V3
)
1240 *reg_list_size
+= 33;
1242 *reg_list
= malloc(sizeof(struct reg
*) * (*reg_list_size
));
1244 for (i
= 0; i
< 16; i
++)
1245 (*reg_list
)[i
] = arm_reg_current(arm
, i
);
1247 for (i
= 13; i
< ARRAY_SIZE(arm_core_regs
); i
++) {
1248 int reg_index
= arm
->core_cache
->reg_list
[i
].number
;
1250 if (arm_core_regs
[i
].mode
== ARM_MODE_MON
1251 && arm
->core_type
!= ARM_CORE_TYPE_SEC_EXT
1252 && arm
->core_type
!= ARM_CORE_TYPE_VIRT_EXT
)
1254 if (arm_core_regs
[i
].mode
== ARM_MODE_HYP
1255 && arm
->core_type
!= ARM_CORE_TYPE_VIRT_EXT
)
1257 (*reg_list
)[reg_index
] = &(arm
->core_cache
->reg_list
[i
]);
1260 /* When we supply the target description, there is no need for fake FPA */
1261 for (i
= 16; i
< 24; i
++) {
1262 (*reg_list
)[i
] = &arm_gdb_dummy_fp_reg
;
1263 (*reg_list
)[i
]->size
= 0;
1265 (*reg_list
)[24] = &arm_gdb_dummy_fps_reg
;
1266 (*reg_list
)[24]->size
= 0;
1268 if (arm
->arm_vfp_version
== ARM_VFP_V3
) {
1269 unsigned int num_core_regs
= ARRAY_SIZE(arm_core_regs
);
1270 for (i
= 0; i
< 33; i
++)
1271 (*reg_list
)[list_size_core
+ i
] = &(arm
->core_cache
->reg_list
[num_core_regs
+ i
]);
1277 LOG_ERROR("not a valid register class type in query.");
1282 /* wait for execution to complete and check exit point */
1283 static int armv4_5_run_algorithm_completion(struct target
*target
,
1284 uint32_t exit_point
,
1289 struct arm
*arm
= target_to_arm(target
);
1291 retval
= target_wait_state(target
, TARGET_HALTED
, timeout_ms
);
1292 if (retval
!= ERROR_OK
)
1294 if (target
->state
!= TARGET_HALTED
) {
1295 retval
= target_halt(target
);
1296 if (retval
!= ERROR_OK
)
1298 retval
= target_wait_state(target
, TARGET_HALTED
, 500);
1299 if (retval
!= ERROR_OK
)
1301 return ERROR_TARGET_TIMEOUT
;
1304 /* fast exit: ARMv5+ code can use BKPT */
1305 if (exit_point
&& buf_get_u32(arm
->pc
->value
, 0, 32) != exit_point
) {
1307 "target reentered debug state, but not at the desired exit point: 0x%4.4" PRIx32
"",
1308 buf_get_u32(arm
->pc
->value
, 0, 32));
1309 return ERROR_TARGET_TIMEOUT
;
1315 int armv4_5_run_algorithm_inner(struct target
*target
,
1316 int num_mem_params
, struct mem_param
*mem_params
,
1317 int num_reg_params
, struct reg_param
*reg_params
,
1318 uint32_t entry_point
, uint32_t exit_point
,
1319 int timeout_ms
, void *arch_info
,
1320 int (*run_it
)(struct target
*target
, uint32_t exit_point
,
1321 int timeout_ms
, void *arch_info
))
1323 struct arm
*arm
= target_to_arm(target
);
1324 struct arm_algorithm
*arm_algorithm_info
= arch_info
;
1325 enum arm_state core_state
= arm
->core_state
;
1326 uint32_t context
[17];
1328 int exit_breakpoint_size
= 0;
1330 int retval
= ERROR_OK
;
1332 LOG_DEBUG("Running algorithm");
1334 if (arm_algorithm_info
->common_magic
!= ARM_COMMON_MAGIC
) {
1335 LOG_ERROR("current target isn't an ARMV4/5 target");
1336 return ERROR_TARGET_INVALID
;
1339 if (target
->state
!= TARGET_HALTED
) {
1340 LOG_WARNING("target not halted");
1341 return ERROR_TARGET_NOT_HALTED
;
1344 if (!is_arm_mode(arm
->core_mode
)) {
1345 LOG_ERROR("not a valid arm core mode - communication failure?");
1349 /* armv5 and later can terminate with BKPT instruction; less overhead */
1350 if (!exit_point
&& arm
->is_armv4
) {
1351 LOG_ERROR("ARMv4 target needs HW breakpoint location");
1355 /* save r0..pc, cpsr-or-spsr, and then cpsr-for-sure;
1356 * they'll be restored later.
1358 for (i
= 0; i
<= 16; i
++) {
1361 r
= &ARMV4_5_CORE_REG_MODE(arm
->core_cache
,
1362 arm_algorithm_info
->core_mode
, i
);
1364 arm
->read_core_reg(target
, r
, i
,
1365 arm_algorithm_info
->core_mode
);
1366 context
[i
] = buf_get_u32(r
->value
, 0, 32);
1368 cpsr
= buf_get_u32(arm
->cpsr
->value
, 0, 32);
1370 for (i
= 0; i
< num_mem_params
; i
++) {
1371 if (mem_params
[i
].direction
== PARAM_IN
)
1373 retval
= target_write_buffer(target
, mem_params
[i
].address
, mem_params
[i
].size
,
1374 mem_params
[i
].value
);
1375 if (retval
!= ERROR_OK
)
1379 for (i
= 0; i
< num_reg_params
; i
++) {
1380 if (reg_params
[i
].direction
== PARAM_IN
)
1383 struct reg
*reg
= register_get_by_name(arm
->core_cache
, reg_params
[i
].reg_name
, 0);
1385 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
1386 return ERROR_COMMAND_SYNTAX_ERROR
;
1389 if (reg
->size
!= reg_params
[i
].size
) {
1390 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size",
1391 reg_params
[i
].reg_name
);
1392 return ERROR_COMMAND_SYNTAX_ERROR
;
1395 retval
= armv4_5_set_core_reg(reg
, reg_params
[i
].value
);
1396 if (retval
!= ERROR_OK
)
1400 arm
->core_state
= arm_algorithm_info
->core_state
;
1401 if (arm
->core_state
== ARM_STATE_ARM
)
1402 exit_breakpoint_size
= 4;
1403 else if (arm
->core_state
== ARM_STATE_THUMB
)
1404 exit_breakpoint_size
= 2;
1406 LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
1407 return ERROR_COMMAND_SYNTAX_ERROR
;
1410 if (arm_algorithm_info
->core_mode
!= ARM_MODE_ANY
) {
1411 LOG_DEBUG("setting core_mode: 0x%2.2x",
1412 arm_algorithm_info
->core_mode
);
1413 buf_set_u32(arm
->cpsr
->value
, 0, 5,
1414 arm_algorithm_info
->core_mode
);
1415 arm
->cpsr
->dirty
= true;
1416 arm
->cpsr
->valid
= true;
1419 /* terminate using a hardware or (ARMv5+) software breakpoint */
1421 retval
= breakpoint_add(target
, exit_point
,
1422 exit_breakpoint_size
, BKPT_HARD
);
1423 if (retval
!= ERROR_OK
) {
1424 LOG_ERROR("can't add HW breakpoint to terminate algorithm");
1425 return ERROR_TARGET_FAILURE
;
1429 retval
= target_resume(target
, 0, entry_point
, 1, 1);
1430 if (retval
!= ERROR_OK
)
1432 retval
= run_it(target
, exit_point
, timeout_ms
, arch_info
);
1435 breakpoint_remove(target
, exit_point
);
1437 if (retval
!= ERROR_OK
)
1440 for (i
= 0; i
< num_mem_params
; i
++) {
1441 if (mem_params
[i
].direction
!= PARAM_OUT
) {
1442 int retvaltemp
= target_read_buffer(target
, mem_params
[i
].address
,
1444 mem_params
[i
].value
);
1445 if (retvaltemp
!= ERROR_OK
)
1446 retval
= retvaltemp
;
1450 for (i
= 0; i
< num_reg_params
; i
++) {
1451 if (reg_params
[i
].direction
!= PARAM_OUT
) {
1453 struct reg
*reg
= register_get_by_name(arm
->core_cache
,
1454 reg_params
[i
].reg_name
,
1457 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
1458 retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1462 if (reg
->size
!= reg_params
[i
].size
) {
1464 "BUG: register '%s' size doesn't match reg_params[i].size",
1465 reg_params
[i
].reg_name
);
1466 retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1470 buf_set_u32(reg_params
[i
].value
, 0, 32, buf_get_u32(reg
->value
, 0, 32));
1474 /* restore everything we saved before (17 or 18 registers) */
1475 for (i
= 0; i
<= 16; i
++) {
1477 regvalue
= buf_get_u32(ARMV4_5_CORE_REG_MODE(arm
->core_cache
,
1478 arm_algorithm_info
->core_mode
, i
).value
, 0, 32);
1479 if (regvalue
!= context
[i
]) {
1480 LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32
"",
1481 ARMV4_5_CORE_REG_MODE(arm
->core_cache
,
1482 arm_algorithm_info
->core_mode
, i
).name
, context
[i
]);
1483 buf_set_u32(ARMV4_5_CORE_REG_MODE(arm
->core_cache
,
1484 arm_algorithm_info
->core_mode
, i
).value
, 0, 32, context
[i
]);
1485 ARMV4_5_CORE_REG_MODE(arm
->core_cache
, arm_algorithm_info
->core_mode
,
1487 ARMV4_5_CORE_REG_MODE(arm
->core_cache
, arm_algorithm_info
->core_mode
,
1492 arm_set_cpsr(arm
, cpsr
);
1493 arm
->cpsr
->dirty
= true;
1495 arm
->core_state
= core_state
;
1500 int armv4_5_run_algorithm(struct target
*target
,
1502 struct mem_param
*mem_params
,
1504 struct reg_param
*reg_params
,
1505 target_addr_t entry_point
,
1506 target_addr_t exit_point
,
1510 return armv4_5_run_algorithm_inner(target
,
1515 (uint32_t)entry_point
,
1516 (uint32_t)exit_point
,
1519 armv4_5_run_algorithm_completion
);
1523 * Runs ARM code in the target to calculate a CRC32 checksum.
1526 int arm_checksum_memory(struct target
*target
,
1527 target_addr_t address
, uint32_t count
, uint32_t *checksum
)
1529 struct working_area
*crc_algorithm
;
1530 struct arm_algorithm arm_algo
;
1531 struct arm
*arm
= target_to_arm(target
);
1532 struct reg_param reg_params
[2];
1535 uint32_t exit_var
= 0;
1537 static const uint8_t arm_crc_code_le
[] = {
1538 #include "../../contrib/loaders/checksum/armv4_5_crc.inc"
1541 assert(sizeof(arm_crc_code_le
) % 4 == 0);
1543 retval
= target_alloc_working_area(target
,
1544 sizeof(arm_crc_code_le
), &crc_algorithm
);
1545 if (retval
!= ERROR_OK
)
1548 /* convert code into a buffer in target endianness */
1549 for (i
= 0; i
< ARRAY_SIZE(arm_crc_code_le
) / 4; i
++) {
1550 retval
= target_write_u32(target
,
1551 crc_algorithm
->address
+ i
* sizeof(uint32_t),
1552 le_to_h_u32(&arm_crc_code_le
[i
* 4]));
1553 if (retval
!= ERROR_OK
)
1557 arm_algo
.common_magic
= ARM_COMMON_MAGIC
;
1558 arm_algo
.core_mode
= ARM_MODE_SVC
;
1559 arm_algo
.core_state
= ARM_STATE_ARM
;
1561 init_reg_param(®_params
[0], "r0", 32, PARAM_IN_OUT
);
1562 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
1564 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
1565 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
1567 /* 20 second timeout/megabyte */
1568 int timeout
= 20000 * (1 + (count
/ (1024 * 1024)));
1570 /* armv4 must exit using a hardware breakpoint */
1572 exit_var
= crc_algorithm
->address
+ sizeof(arm_crc_code_le
) - 8;
1574 retval
= target_run_algorithm(target
, 0, NULL
, 2, reg_params
,
1575 crc_algorithm
->address
,
1577 timeout
, &arm_algo
);
1579 if (retval
== ERROR_OK
)
1580 *checksum
= buf_get_u32(reg_params
[0].value
, 0, 32);
1582 LOG_ERROR("error executing ARM crc algorithm");
1584 destroy_reg_param(®_params
[0]);
1585 destroy_reg_param(®_params
[1]);
1588 target_free_working_area(target
, crc_algorithm
);
1594 * Runs ARM code in the target to check whether a memory block holds
1595 * all ones. NOR flash which has been erased, and thus may be written,
1599 int arm_blank_check_memory(struct target
*target
,
1600 struct target_memory_check_block
*blocks
, int num_blocks
, uint8_t erased_value
)
1602 struct working_area
*check_algorithm
;
1603 struct reg_param reg_params
[3];
1604 struct arm_algorithm arm_algo
;
1605 struct arm
*arm
= target_to_arm(target
);
1608 uint32_t exit_var
= 0;
1610 static const uint8_t check_code_le
[] = {
1611 #include "../../contrib/loaders/erase_check/armv4_5_erase_check.inc"
1614 assert(sizeof(check_code_le
) % 4 == 0);
1616 if (erased_value
!= 0xff) {
1617 LOG_ERROR("Erase value 0x%02" PRIx8
" not yet supported for ARMv4/v5 targets",
1622 /* make sure we have a working area */
1623 retval
= target_alloc_working_area(target
,
1624 sizeof(check_code_le
), &check_algorithm
);
1625 if (retval
!= ERROR_OK
)
1628 /* convert code into a buffer in target endianness */
1629 for (i
= 0; i
< ARRAY_SIZE(check_code_le
) / 4; i
++) {
1630 retval
= target_write_u32(target
,
1631 check_algorithm
->address
1632 + i
* sizeof(uint32_t),
1633 le_to_h_u32(&check_code_le
[i
* 4]));
1634 if (retval
!= ERROR_OK
)
1638 arm_algo
.common_magic
= ARM_COMMON_MAGIC
;
1639 arm_algo
.core_mode
= ARM_MODE_SVC
;
1640 arm_algo
.core_state
= ARM_STATE_ARM
;
1642 init_reg_param(®_params
[0], "r0", 32, PARAM_OUT
);
1643 buf_set_u32(reg_params
[0].value
, 0, 32, blocks
[0].address
);
1645 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
1646 buf_set_u32(reg_params
[1].value
, 0, 32, blocks
[0].size
);
1648 init_reg_param(®_params
[2], "r2", 32, PARAM_IN_OUT
);
1649 buf_set_u32(reg_params
[2].value
, 0, 32, erased_value
);
1651 /* armv4 must exit using a hardware breakpoint */
1653 exit_var
= check_algorithm
->address
+ sizeof(check_code_le
) - 4;
1655 retval
= target_run_algorithm(target
, 0, NULL
, 3, reg_params
,
1656 check_algorithm
->address
,
1660 if (retval
== ERROR_OK
)
1661 blocks
[0].result
= buf_get_u32(reg_params
[2].value
, 0, 32);
1663 destroy_reg_param(®_params
[0]);
1664 destroy_reg_param(®_params
[1]);
1665 destroy_reg_param(®_params
[2]);
1668 target_free_working_area(target
, check_algorithm
);
1670 if (retval
!= ERROR_OK
)
1673 return 1; /* only one block has been checked */
1676 static int arm_full_context(struct target
*target
)
1678 struct arm
*arm
= target_to_arm(target
);
1679 unsigned num_regs
= arm
->core_cache
->num_regs
;
1680 struct reg
*reg
= arm
->core_cache
->reg_list
;
1681 int retval
= ERROR_OK
;
1683 for (; num_regs
&& retval
== ERROR_OK
; num_regs
--, reg
++) {
1684 if (!reg
->exist
|| reg
->valid
)
1686 retval
= armv4_5_get_core_reg(reg
);
1691 static int arm_default_mrc(struct target
*target
, int cpnum
,
1692 uint32_t op1
, uint32_t op2
,
1693 uint32_t CRn
, uint32_t CRm
,
1696 LOG_ERROR("%s doesn't implement MRC", target_type_name(target
));
1700 static int arm_default_mcr(struct target
*target
, int cpnum
,
1701 uint32_t op1
, uint32_t op2
,
1702 uint32_t CRn
, uint32_t CRm
,
1705 LOG_ERROR("%s doesn't implement MCR", target_type_name(target
));
1709 int arm_init_arch_info(struct target
*target
, struct arm
*arm
)
1711 target
->arch_info
= arm
;
1712 arm
->target
= target
;
1714 arm
->common_magic
= ARM_COMMON_MAGIC
;
1716 /* core_type may be overridden by subtype logic */
1717 if (arm
->core_type
!= ARM_CORE_TYPE_M_PROFILE
) {
1718 arm
->core_type
= ARM_CORE_TYPE_STD
;
1719 arm_set_cpsr(arm
, ARM_MODE_USR
);
1722 /* default full_context() has no core-specific optimizations */
1723 if (!arm
->full_context
&& arm
->read_core_reg
)
1724 arm
->full_context
= arm_full_context
;
1727 arm
->mrc
= arm_default_mrc
;
1729 arm
->mcr
= arm_default_mcr
;