#endif
#include "armv4_5.h"
+#include "arm_jtag.h"
+#include "breakpoints.h"
#include "arm_disassembler.h"
-#include "binarybuffer.h"
-
+#include <helper/binarybuffer.h>
+#include "algorithm.h"
+#include "register.h"
+
+
+/* offsets into armv4_5 core register cache */
+enum {
+// ARMV4_5_CPSR = 31,
+ ARMV4_5_SPSR_FIQ = 32,
+ ARMV4_5_SPSR_IRQ = 33,
+ ARMV4_5_SPSR_SVC = 34,
+ ARMV4_5_SPSR_ABT = 35,
+ ARMV4_5_SPSR_UND = 36,
+ ARM_SPSR_MON = 39,
+};
-bitfield_desc_t armv4_5_psr_bitfield_desc[] =
-{
- {"M[4:0]", 5},
- {"T", 1},
- {"F", 1},
- {"I", 1},
- {"reserved", 16},
- {"J", 1},
- {"reserved", 2},
- {"Q", 1},
- {"V", 1},
- {"C", 1},
- {"Z", 1},
- {"N", 1},
+static const uint8_t arm_usr_indices[17] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, ARMV4_5_CPSR,
};
-char* armv4_5_core_reg_list[] =
-{
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13_usr", "lr_usr", "pc",
+static const uint8_t arm_fiq_indices[8] = {
+ 16, 17, 18, 19, 20, 21, 22, ARMV4_5_SPSR_FIQ,
+};
- "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "lr_fiq",
+static const uint8_t arm_irq_indices[3] = {
+ 23, 24, ARMV4_5_SPSR_IRQ,
+};
- "r13_irq", "lr_irq",
+static const uint8_t arm_svc_indices[3] = {
+ 25, 26, ARMV4_5_SPSR_SVC,
+};
- "r13_svc", "lr_svc",
+static const uint8_t arm_abt_indices[3] = {
+ 27, 28, ARMV4_5_SPSR_ABT,
+};
- "r13_abt", "lr_abt",
+static const uint8_t arm_und_indices[3] = {
+ 29, 30, ARMV4_5_SPSR_UND,
+};
- "r13_und", "lr_und",
+static const uint8_t arm_mon_indices[3] = {
+ 37, 38, ARM_SPSR_MON,
+};
- "cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und"
+static const struct {
+ const char *name;
+ unsigned short psr;
+ /* For user and system modes, these list indices for all registers.
+ * otherwise they're just indices for the shadow registers and SPSR.
+ */
+ unsigned short n_indices;
+ const uint8_t *indices;
+} arm_mode_data[] = {
+ /* Seven modes are standard from ARM7 on. "System" and "User" share
+ * the same registers; other modes shadow from 3 to 8 registers.
+ */
+ {
+ .name = "User",
+ .psr = ARMV4_5_MODE_USR,
+ .n_indices = ARRAY_SIZE(arm_usr_indices),
+ .indices = arm_usr_indices,
+ },
+ {
+ .name = "FIQ",
+ .psr = ARMV4_5_MODE_FIQ,
+ .n_indices = ARRAY_SIZE(arm_fiq_indices),
+ .indices = arm_fiq_indices,
+ },
+ {
+ .name = "Supervisor",
+ .psr = ARMV4_5_MODE_SVC,
+ .n_indices = ARRAY_SIZE(arm_svc_indices),
+ .indices = arm_svc_indices,
+ },
+ {
+ .name = "Abort",
+ .psr = ARMV4_5_MODE_ABT,
+ .n_indices = ARRAY_SIZE(arm_abt_indices),
+ .indices = arm_abt_indices,
+ },
+ {
+ .name = "IRQ",
+ .psr = ARMV4_5_MODE_IRQ,
+ .n_indices = ARRAY_SIZE(arm_irq_indices),
+ .indices = arm_irq_indices,
+ },
+ {
+ .name = "Undefined instruction",
+ .psr = ARMV4_5_MODE_UND,
+ .n_indices = ARRAY_SIZE(arm_und_indices),
+ .indices = arm_und_indices,
+ },
+ {
+ .name = "System",
+ .psr = ARMV4_5_MODE_SYS,
+ .n_indices = ARRAY_SIZE(arm_usr_indices),
+ .indices = arm_usr_indices,
+ },
+ /* TrustZone "Security Extensions" add a secure monitor mode.
+ * This is distinct from a "debug monitor" which can support
+ * non-halting debug, in conjunction with some debuggers.
+ */
+ {
+ .name = "Secure Monitor",
+ .psr = ARM_MODE_MON,
+ .n_indices = ARRAY_SIZE(arm_mon_indices),
+ .indices = arm_mon_indices,
+ },
};
-char * armv4_5_mode_strings_list[] =
+/** Map PSR mode bits to the name of an ARM processor operating mode. */
+const char *arm_mode_name(unsigned psr_mode)
{
- "Illegal mode value", "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System"
-};
+ for (unsigned i = 0; i < ARRAY_SIZE(arm_mode_data); i++) {
+ if (arm_mode_data[i].psr == psr_mode)
+ return arm_mode_data[i].name;
+ }
+ LOG_ERROR("unrecognized psr mode: %#02x", psr_mode);
+ return "UNRECOGNIZED";
+}
-/* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
-char** armv4_5_mode_strings = armv4_5_mode_strings_list + 1;
+/** Return true iff the parameter denotes a valid ARM processor mode. */
+bool is_arm_mode(unsigned psr_mode)
+{
+ for (unsigned i = 0; i < ARRAY_SIZE(arm_mode_data); i++) {
+ if (arm_mode_data[i].psr == psr_mode)
+ return true;
+ }
+ return false;
+}
-char* armv4_5_state_strings[] =
+/** Map PSR mode bits to linear number indexing armv4_5_core_reg_map */
+int armv4_5_mode_to_number(enum armv4_5_mode mode)
{
- "ARM", "Thumb", "Jazelle"
-};
+ switch (mode) {
+ case ARMV4_5_MODE_ANY:
+ /* map MODE_ANY to user mode */
+ case ARMV4_5_MODE_USR:
+ return 0;
+ case ARMV4_5_MODE_FIQ:
+ return 1;
+ case ARMV4_5_MODE_IRQ:
+ return 2;
+ case ARMV4_5_MODE_SVC:
+ return 3;
+ case ARMV4_5_MODE_ABT:
+ return 4;
+ case ARMV4_5_MODE_UND:
+ return 5;
+ case ARMV4_5_MODE_SYS:
+ return 6;
+ case ARM_MODE_MON:
+ return 7;
+ default:
+ LOG_ERROR("invalid mode value encountered %d", mode);
+ return -1;
+ }
+}
-int armv4_5_core_reg_arch_type = -1;
+/** Map linear number indexing armv4_5_core_reg_map to PSR mode bits. */
+enum armv4_5_mode armv4_5_number_to_mode(int number)
+{
+ switch (number) {
+ case 0:
+ return ARMV4_5_MODE_USR;
+ case 1:
+ return ARMV4_5_MODE_FIQ;
+ case 2:
+ return ARMV4_5_MODE_IRQ;
+ case 3:
+ return ARMV4_5_MODE_SVC;
+ case 4:
+ return ARMV4_5_MODE_ABT;
+ case 5:
+ return ARMV4_5_MODE_UND;
+ case 6:
+ return ARMV4_5_MODE_SYS;
+ case 7:
+ return ARM_MODE_MON;
+ default:
+ LOG_ERROR("mode index out of bounds %d", number);
+ return ARMV4_5_MODE_ANY;
+ }
+}
-armv4_5_core_reg_t armv4_5_core_reg_list_arch_info[] =
+char* armv4_5_state_strings[] =
{
- {0, ARMV4_5_MODE_ANY, NULL, NULL},
- {1, ARMV4_5_MODE_ANY, NULL, NULL},
- {2, ARMV4_5_MODE_ANY, NULL, NULL},
- {3, ARMV4_5_MODE_ANY, NULL, NULL},
- {4, ARMV4_5_MODE_ANY, NULL, NULL},
- {5, ARMV4_5_MODE_ANY, NULL, NULL},
- {6, ARMV4_5_MODE_ANY, NULL, NULL},
- {7, ARMV4_5_MODE_ANY, NULL, NULL},
- {8, ARMV4_5_MODE_ANY, NULL, NULL},
- {9, ARMV4_5_MODE_ANY, NULL, NULL},
- {10, ARMV4_5_MODE_ANY, NULL, NULL},
- {11, ARMV4_5_MODE_ANY, NULL, NULL},
- {12, ARMV4_5_MODE_ANY, NULL, NULL},
- {13, ARMV4_5_MODE_USR, NULL, NULL},
- {14, ARMV4_5_MODE_USR, NULL, NULL},
- {15, ARMV4_5_MODE_ANY, NULL, NULL},
-
- {8, ARMV4_5_MODE_FIQ, NULL, NULL},
- {9, ARMV4_5_MODE_FIQ, NULL, NULL},
- {10, ARMV4_5_MODE_FIQ, NULL, NULL},
- {11, ARMV4_5_MODE_FIQ, NULL, NULL},
- {12, ARMV4_5_MODE_FIQ, NULL, NULL},
- {13, ARMV4_5_MODE_FIQ, NULL, NULL},
- {14, ARMV4_5_MODE_FIQ, NULL, NULL},
-
- {13, ARMV4_5_MODE_IRQ, NULL, NULL},
- {14, ARMV4_5_MODE_IRQ, NULL, NULL},
-
- {13, ARMV4_5_MODE_SVC, NULL, NULL},
- {14, ARMV4_5_MODE_SVC, NULL, NULL},
-
- {13, ARMV4_5_MODE_ABT, NULL, NULL},
- {14, ARMV4_5_MODE_ABT, NULL, NULL},
-
- {13, ARMV4_5_MODE_UND, NULL, NULL},
- {14, ARMV4_5_MODE_UND, NULL, NULL},
-
- {16, ARMV4_5_MODE_ANY, NULL, NULL},
- {16, ARMV4_5_MODE_FIQ, NULL, NULL},
- {16, ARMV4_5_MODE_IRQ, NULL, NULL},
- {16, ARMV4_5_MODE_SVC, NULL, NULL},
- {16, ARMV4_5_MODE_ABT, NULL, NULL},
- {16, ARMV4_5_MODE_UND, NULL, NULL}
+ "ARM", "Thumb", "Jazelle", "ThumbEE",
+};
+
+/* Templates for ARM core registers.
+ *
+ * NOTE: offsets in this table are coupled to the arm_mode_data
+ * table above, the armv4_5_core_reg_map array below, and also to
+ * the ARMV4_5_CPSR symbol (which should vanish after ARM11 updates).
+ */
+static const struct {
+ /* The name is used for e.g. the "regs" command. */
+ const char *name;
+
+ /* The {cookie, mode} tuple uniquely identifies one register.
+ * In a given mode, cookies 0..15 map to registers R0..R15,
+ * with R13..R15 usually called SP, LR, PC.
+ *
+ * MODE_ANY is used as *input* to the mapping, and indicates
+ * various special cases (sigh) and errors.
+ *
+ * Cookie 16 is (currently) confusing, since it indicates
+ * CPSR -or- SPSR depending on whether 'mode' is MODE_ANY.
+ * (Exception modes have both CPSR and SPSR registers ...)
+ */
+ unsigned cookie;
+ enum armv4_5_mode mode;
+} arm_core_regs[] = {
+ /* IMPORTANT: we guarantee that the first eight cached registers
+ * correspond to r0..r7, and the fifteenth to PC, so that callers
+ * don't need to map them.
+ */
+ { .name = "r0", .cookie = 0, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r1", .cookie = 1, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r2", .cookie = 2, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r3", .cookie = 3, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r4", .cookie = 4, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r5", .cookie = 5, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r6", .cookie = 6, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r7", .cookie = 7, .mode = ARMV4_5_MODE_ANY, },
+
+ /* NOTE: regs 8..12 might be shadowed by FIQ ... flagging
+ * them as MODE_ANY creates special cases. (ANY means
+ * "not mapped" elsewhere; here it's "everything but FIQ".)
+ */
+ { .name = "r8", .cookie = 8, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r9", .cookie = 9, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r10", .cookie = 10, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r11", .cookie = 11, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "r12", .cookie = 12, .mode = ARMV4_5_MODE_ANY, },
+
+ /* NOTE all MODE_USR registers are equivalent to MODE_SYS ones */
+ { .name = "sp_usr", .cookie = 13, .mode = ARMV4_5_MODE_USR, },
+ { .name = "lr_usr", .cookie = 14, .mode = ARMV4_5_MODE_USR, },
+
+ /* guaranteed to be at index 15 */
+ { .name = "pc", .cookie = 15, .mode = ARMV4_5_MODE_ANY, },
+
+ { .name = "r8_fiq", .cookie = 8, .mode = ARMV4_5_MODE_FIQ, },
+ { .name = "r9_fiq", .cookie = 9, .mode = ARMV4_5_MODE_FIQ, },
+ { .name = "r10_fiq", .cookie = 10, .mode = ARMV4_5_MODE_FIQ, },
+ { .name = "r11_fiq", .cookie = 11, .mode = ARMV4_5_MODE_FIQ, },
+ { .name = "r12_fiq", .cookie = 12, .mode = ARMV4_5_MODE_FIQ, },
+
+ { .name = "sp_fiq", .cookie = 13, .mode = ARMV4_5_MODE_FIQ, },
+ { .name = "lr_fiq", .cookie = 14, .mode = ARMV4_5_MODE_FIQ, },
+
+ { .name = "sp_irq", .cookie = 13, .mode = ARMV4_5_MODE_IRQ, },
+ { .name = "lr_irq", .cookie = 14, .mode = ARMV4_5_MODE_IRQ, },
+
+ { .name = "sp_svc", .cookie = 13, .mode = ARMV4_5_MODE_SVC, },
+ { .name = "lr_svc", .cookie = 14, .mode = ARMV4_5_MODE_SVC, },
+
+ { .name = "sp_abt", .cookie = 13, .mode = ARMV4_5_MODE_ABT, },
+ { .name = "lr_abt", .cookie = 14, .mode = ARMV4_5_MODE_ABT, },
+
+ { .name = "sp_und", .cookie = 13, .mode = ARMV4_5_MODE_UND, },
+ { .name = "lr_und", .cookie = 14, .mode = ARMV4_5_MODE_UND, },
+
+ { .name = "cpsr", .cookie = 16, .mode = ARMV4_5_MODE_ANY, },
+ { .name = "spsr_fiq", .cookie = 16, .mode = ARMV4_5_MODE_FIQ, },
+ { .name = "spsr_irq", .cookie = 16, .mode = ARMV4_5_MODE_IRQ, },
+ { .name = "spsr_svc", .cookie = 16, .mode = ARMV4_5_MODE_SVC, },
+ { .name = "spsr_abt", .cookie = 16, .mode = ARMV4_5_MODE_ABT, },
+ { .name = "spsr_und", .cookie = 16, .mode = ARMV4_5_MODE_UND, },
+
+ { .name = "sp_mon", .cookie = 13, .mode = ARM_MODE_MON, },
+ { .name = "lr_mon", .cookie = 14, .mode = ARM_MODE_MON, },
+ { .name = "spsr_mon", .cookie = 16, .mode = ARM_MODE_MON, },
};
-/* map core mode (USR, FIQ, ...) and register number to indizes into the register cache */
-int armv4_5_core_reg_map[7][17] =
+/* map core mode (USR, FIQ, ...) and register number to
+ * indices into the register cache
+ */
+const int armv4_5_core_reg_map[8][17] =
{
{ /* USR */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
},
- { /* FIQ */
+ { /* FIQ (8 shadows of USR, vs normal 3) */
0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 15, 32
},
{ /* IRQ */
{ /* UND */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 15, 36
},
- { /* SYS */
+ { /* SYS (same registers as USR) */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
+ },
+ { /* MON */
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 37, 38, 15, 39,
}
};
-uint8_t armv4_5_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+/**
+ * Configures host-side ARM records to reflect the specified CPSR.
+ * Later, code can use arm_reg_current() to map register numbers
+ * according to how they are exposed by this mode.
+ */
+void arm_set_cpsr(struct arm *arm, uint32_t cpsr)
+{
+ enum armv4_5_mode mode = cpsr & 0x1f;
+ int num;
+
+ /* NOTE: this may be called very early, before the register
+ * cache is set up. We can't defend against many errors, in
+ * particular against CPSRs that aren't valid *here* ...
+ */
+ if (arm->cpsr) {
+ buf_set_u32(arm->cpsr->value, 0, 32, cpsr);
+ arm->cpsr->valid = 1;
+ arm->cpsr->dirty = 0;
+ }
+
+ arm->core_mode = mode;
+
+ /* mode_to_number() warned; set up a somewhat-sane mapping */
+ num = armv4_5_mode_to_number(mode);
+ if (num < 0) {
+ mode = ARMV4_5_MODE_USR;
+ num = 0;
+ }
+
+ arm->map = &armv4_5_core_reg_map[num][0];
+ arm->spsr = (mode == ARMV4_5_MODE_USR || mode == ARMV4_5_MODE_SYS)
+ ? NULL
+ : arm->core_cache->reg_list + arm->map[16];
+
+ /* Older ARMs won't have the J bit */
+ enum armv4_5_state state;
+
+ if (cpsr & (1 << 5)) { /* T */
+ if (cpsr & (1 << 24)) { /* J */
+ LOG_WARNING("ThumbEE -- incomplete support");
+ state = ARM_STATE_THUMB_EE;
+ } else
+ state = ARMV4_5_STATE_THUMB;
+ } else {
+ if (cpsr & (1 << 24)) { /* J */
+ LOG_ERROR("Jazelle state handling is BROKEN!");
+ state = ARMV4_5_STATE_JAZELLE;
+ } else
+ state = ARMV4_5_STATE_ARM;
+ }
+ arm->core_state = state;
+
+ LOG_DEBUG("set CPSR %#8.8x: %s mode, %s state", (unsigned) cpsr,
+ arm_mode_name(mode),
+ armv4_5_state_strings[arm->core_state]);
+}
+
+/**
+ * Returns handle to the register currently mapped to a given number.
+ * Someone must have called arm_set_cpsr() before.
+ *
+ * \param arm This core's state and registers are used.
+ * \param regnum From 0..15 corresponding to R0..R14 and PC.
+ * Note that R0..R7 don't require mapping; you may access those
+ * as the first eight entries in the register cache. Likewise
+ * R15 (PC) doesn't need mapping; you may also access it directly.
+ * However, R8..R14, and SPSR (arm->spsr) *must* be mapped.
+ * CPSR (arm->cpsr) is also not mapped.
+ */
+struct reg *arm_reg_current(struct arm *arm, unsigned regnum)
+{
+ struct reg *r;
+
+ if (regnum > 16)
+ return NULL;
+
+ r = arm->core_cache->reg_list + arm->map[regnum];
-reg_t armv4_5_gdb_dummy_fp_reg =
+ /* e.g. invalid CPSR said "secure monitor" mode on a core
+ * that doesn't support it...
+ */
+ if (!r) {
+ LOG_ERROR("Invalid CPSR mode");
+ r = arm->core_cache->reg_list + regnum;
+ }
+
+ return r;
+}
+
+static const uint8_t arm_gdb_dummy_fp_value[12];
+
+/**
+ * Dummy FPA registers are required to support GDB on ARM.
+ * Register packets require eight obsolete FPA register values.
+ * Modern ARM cores use Vector Floating Point (VFP), if they
+ * have any floating point support. VFP is not FPA-compatible.
+ */
+struct reg arm_gdb_dummy_fp_reg =
{
- "GDB dummy floating-point register", armv4_5_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
+ .name = "GDB dummy FPA register",
+ .value = (uint8_t *) arm_gdb_dummy_fp_value,
+ .valid = 1,
+ .size = 96,
};
-uint8_t armv4_5_gdb_dummy_fps_value[] = {0, 0, 0, 0};
+static const uint8_t arm_gdb_dummy_fps_value[4];
-reg_t armv4_5_gdb_dummy_fps_reg =
+/**
+ * Dummy FPA status registers are required to support GDB on ARM.
+ * Register packets require an obsolete FPA status register.
+ */
+struct reg arm_gdb_dummy_fps_reg =
{
- "GDB dummy floating-point status register", armv4_5_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0
+ .name = "GDB dummy FPA status register",
+ .value = (uint8_t *) arm_gdb_dummy_fps_value,
+ .valid = 1,
+ .size = 32,
};
-int armv4_5_get_core_reg(reg_t *reg)
+static void arm_gdb_dummy_init(void) __attribute__ ((constructor));
+
+static void arm_gdb_dummy_init(void)
+{
+ register_init_dummy(&arm_gdb_dummy_fp_reg);
+ register_init_dummy(&arm_gdb_dummy_fps_reg);
+}
+
+static int armv4_5_get_core_reg(struct reg *reg)
{
int retval;
- armv4_5_core_reg_t *armv4_5 = reg->arch_info;
- target_t *target = armv4_5->target;
+ struct arm_reg *armv4_5 = reg->arch_info;
+ struct target *target = armv4_5->target;
if (target->state != TARGET_HALTED)
{
return ERROR_TARGET_NOT_HALTED;
}
- /* retval = armv4_5->armv4_5_common->full_context(target); */
- retval = armv4_5->armv4_5_common->read_core_reg(target, armv4_5->num, armv4_5->mode);
+ retval = armv4_5->armv4_5_common->read_core_reg(target, reg, armv4_5->num, armv4_5->mode);
+ if (retval == ERROR_OK) {
+ reg->valid = 1;
+ reg->dirty = 0;
+ }
return retval;
}
-int armv4_5_set_core_reg(reg_t *reg, uint8_t *buf)
+static int armv4_5_set_core_reg(struct reg *reg, uint8_t *buf)
{
- armv4_5_core_reg_t *armv4_5 = reg->arch_info;
- target_t *target = armv4_5->target;
- struct armv4_5_common_s *armv4_5_target = target_to_armv4_5(target);
+ struct arm_reg *armv4_5 = reg->arch_info;
+ struct target *target = armv4_5->target;
+ struct arm *armv4_5_target = target_to_armv4_5(target);
uint32_t value = buf_get_u32(buf, 0, 32);
if (target->state != TARGET_HALTED)
{
+ LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
- if (reg == &armv4_5_target->core_cache->reg_list[ARMV4_5_CPSR])
- {
- if (value & 0x20)
- {
- /* T bit should be set */
- if (armv4_5_target->core_state == ARMV4_5_STATE_ARM)
- {
- /* change state to Thumb */
- LOG_DEBUG("changing to Thumb state");
- armv4_5_target->core_state = ARMV4_5_STATE_THUMB;
- }
- }
- else
- {
- /* T bit should be cleared */
- if (armv4_5_target->core_state == ARMV4_5_STATE_THUMB)
- {
- /* change state to ARM */
- LOG_DEBUG("changing to ARM state");
- armv4_5_target->core_state = ARMV4_5_STATE_ARM;
- }
- }
-
- if (armv4_5_target->core_mode != (enum armv4_5_mode)(value & 0x1f))
- {
- LOG_DEBUG("changing ARM core mode to '%s'", armv4_5_mode_strings[armv4_5_mode_to_number(value & 0x1f)]);
- armv4_5_target->core_mode = value & 0x1f;
- armv4_5_target->write_core_reg(target, 16, ARMV4_5_MODE_ANY, value);
+ /* Except for CPSR, the "reg" command exposes a writeback model
+ * for the register cache.
+ */
+ if (reg == armv4_5_target->cpsr) {
+ arm_set_cpsr(armv4_5_target, value);
+
+ /* Older cores need help to be in ARM mode during halt
+ * mode debug, so we clear the J and T bits if we flush.
+ * For newer cores (v6/v7a/v7r) we don't need that, but
+ * it won't hurt since CPSR is always flushed anyway.
+ */
+ if (armv4_5_target->core_mode !=
+ (enum armv4_5_mode)(value & 0x1f)) {
+ LOG_DEBUG("changing ARM core mode to '%s'",
+ arm_mode_name(value & 0x1f));
+ value &= ~((1 << 24) | (1 << 5));
+ armv4_5_target->write_core_reg(target, reg,
+ 16, ARMV4_5_MODE_ANY, value);
}
+ } else {
+ buf_set_u32(reg->value, 0, 32, value);
+ reg->valid = 1;
}
-
- buf_set_u32(reg->value, 0, 32, value);
reg->dirty = 1;
- reg->valid = 1;
return ERROR_OK;
}
-int armv4_5_invalidate_core_regs(target_t *target)
+static const struct reg_arch_type arm_reg_type = {
+ .get = armv4_5_get_core_reg,
+ .set = armv4_5_set_core_reg,
+};
+
+struct reg_cache* armv4_5_build_reg_cache(struct target *target, struct arm *armv4_5_common)
{
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ int num_regs = ARRAY_SIZE(arm_core_regs);
+ struct reg_cache *cache = malloc(sizeof(struct reg_cache));
+ struct reg *reg_list = calloc(num_regs, sizeof(struct reg));
+ struct arm_reg *arch_info = calloc(num_regs, sizeof(struct arm_reg));
int i;
- for (i = 0; i < 37; i++)
- {
- armv4_5->core_cache->reg_list[i].valid = 0;
- armv4_5->core_cache->reg_list[i].dirty = 0;
+ if (!cache || !reg_list || !arch_info) {
+ free(cache);
+ free(reg_list);
+ free(arch_info);
+ return NULL;
}
- return ERROR_OK;
-}
-
-reg_cache_t* armv4_5_build_reg_cache(target_t *target, armv4_5_common_t *armv4_5_common)
-{
- int num_regs = 37;
- reg_cache_t *cache = malloc(sizeof(reg_cache_t));
- reg_t *reg_list = malloc(sizeof(reg_t) * num_regs);
- armv4_5_core_reg_t *arch_info = malloc(sizeof(armv4_5_core_reg_t) * num_regs);
- int i;
-
- cache->name = "arm v4/5 registers";
+ cache->name = "ARM registers";
cache->next = NULL;
cache->reg_list = reg_list;
- cache->num_regs = num_regs;
+ cache->num_regs = 0;
- if (armv4_5_core_reg_arch_type == -1)
- armv4_5_core_reg_arch_type = register_reg_arch_type(armv4_5_get_core_reg, armv4_5_set_core_reg);
+ for (i = 0; i < num_regs; i++)
+ {
+ /* Skip registers this core doesn't expose */
+ if (arm_core_regs[i].mode == ARM_MODE_MON
+ && armv4_5_common->core_type != ARM_MODE_MON)
+ continue;
- register_init_dummy(&armv4_5_gdb_dummy_fp_reg);
- register_init_dummy(&armv4_5_gdb_dummy_fps_reg);
+ /* REVISIT handle Cortex-M, which only shadows R13/SP */
- for (i = 0; i < 37; i++)
- {
- arch_info[i] = armv4_5_core_reg_list_arch_info[i];
+ arch_info[i].num = arm_core_regs[i].cookie;
+ arch_info[i].mode = arm_core_regs[i].mode;
arch_info[i].target = target;
arch_info[i].armv4_5_common = armv4_5_common;
- reg_list[i].name = armv4_5_core_reg_list[i];
+
+ reg_list[i].name = (char *) arm_core_regs[i].name;
reg_list[i].size = 32;
- 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 = armv4_5_core_reg_arch_type;
+ reg_list[i].value = &arch_info[i].value;
+ reg_list[i].type = &arm_reg_type;
reg_list[i].arch_info = &arch_info[i];
+
+ cache->num_regs++;
}
+ armv4_5_common->cpsr = reg_list + ARMV4_5_CPSR;
+ armv4_5_common->core_cache = cache;
return cache;
}
-int armv4_5_arch_state(struct target_s *target)
+int armv4_5_arch_state(struct target *target)
{
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ struct arm *armv4_5 = target_to_armv4_5(target);
if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
{
LOG_ERROR("BUG: called for a non-ARMv4/5 target");
- exit(-1);
+ return ERROR_FAIL;
}
LOG_USER("target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "",
armv4_5_state_strings[armv4_5->core_state],
Jim_Nvp_value2name_simple(nvp_target_debug_reason, target->debug_reason)->name,
- armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
+ arm_mode_name(armv4_5->core_mode),
+ buf_get_u32(armv4_5->cpsr->value, 0, 32),
buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
return ERROR_OK;
}
+#define ARMV4_5_CORE_REG_MODENUM(cache, mode, num) \
+ cache->reg_list[armv4_5_core_reg_map[mode][num]]
+
COMMAND_HANDLER(handle_armv4_5_reg_command)
{
- char output[128];
- int output_len;
- int mode, num;
- target_t *target = get_current_target(cmd_ctx);
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ struct target *target = get_current_target(CMD_CTX);
+ struct arm *armv4_5 = target_to_armv4_5(target);
+ unsigned num_regs;
+ struct reg *regs;
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
+ if (!is_arm(armv4_5))
{
- command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
- return ERROR_OK;
+ command_print(CMD_CTX, "current target isn't an ARM");
+ return ERROR_FAIL;
}
if (target->state != TARGET_HALTED)
{
- command_print(cmd_ctx, "error: target must be halted for register accesses");
- return ERROR_OK;
+ command_print(CMD_CTX, "error: target must be halted for register accesses");
+ return ERROR_FAIL;
}
- if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
+ if (!is_arm_mode(armv4_5->core_mode))
return ERROR_FAIL;
- for (num = 0; num <= 15; num++)
- {
- output_len = 0;
- for (mode = 0; mode < 6; mode++)
- {
- if (!ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).valid)
- {
- armv4_5->full_context(target);
- }
- output_len += snprintf(output + output_len,
- 128 - output_len,
+ if (!armv4_5->full_context) {
+ command_print(CMD_CTX, "error: target doesn't support %s",
+ CMD_NAME);
+ return ERROR_FAIL;
+ }
+
+ num_regs = armv4_5->core_cache->num_regs;
+ regs = armv4_5->core_cache->reg_list;
+
+ for (unsigned mode = 0; mode < ARRAY_SIZE(arm_mode_data); mode++) {
+ const char *name;
+ char *sep = "\n";
+ char *shadow = "";
+
+ /* label this bank of registers (or shadows) */
+ switch (arm_mode_data[mode].psr) {
+ case ARMV4_5_MODE_SYS:
+ continue;
+ case ARMV4_5_MODE_USR:
+ name = "System and User";
+ sep = "";
+ break;
+ case ARM_MODE_MON:
+ if (armv4_5->core_type != ARM_MODE_MON)
+ continue;
+ /* FALLTHROUGH */
+ default:
+ name = arm_mode_data[mode].name;
+ shadow = "shadow ";
+ break;
+ }
+ command_print(CMD_CTX, "%s%s mode %sregisters",
+ sep, name, shadow);
+
+ /* display N rows of up to 4 registers each */
+ for (unsigned i = 0; i < arm_mode_data[mode].n_indices;) {
+ char output[80];
+ int output_len = 0;
+
+ for (unsigned j = 0; j < 4; j++, i++) {
+ uint32_t value;
+ struct reg *reg = regs;
+
+ if (i >= arm_mode_data[mode].n_indices)
+ break;
+
+ reg += arm_mode_data[mode].indices[i];
+
+ /* REVISIT be smarter about faults... */
+ if (!reg->valid)
+ armv4_5->full_context(target);
+
+ value = buf_get_u32(reg->value, 0, 32);
+ output_len += snprintf(output + output_len,
+ sizeof(output) - output_len,
"%8s: %8.8" PRIx32 " ",
- ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).name,
- buf_get_u32(ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).value, 0, 32));
+ reg->name, value);
+ }
+ command_print(CMD_CTX, "%s", output);
}
- command_print(cmd_ctx, "%s", output);
}
- command_print(cmd_ctx,
- " cpsr: %8.8" PRIx32 " spsr_fiq: %8.8" PRIx32 " spsr_irq: %8.8" PRIx32 " spsr_svc: %8.8" PRIx32 " spsr_abt: %8.8" PRIx32 " spsr_und: %8.8" PRIx32 "",
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_FIQ].value, 0, 32),
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_IRQ].value, 0, 32),
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_SVC].value, 0, 32),
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_ABT].value, 0, 32),
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_UND].value, 0, 32));
return ERROR_OK;
}
COMMAND_HANDLER(handle_armv4_5_core_state_command)
{
- target_t *target = get_current_target(cmd_ctx);
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ struct target *target = get_current_target(CMD_CTX);
+ struct arm *armv4_5 = target_to_armv4_5(target);
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
+ if (!is_arm(armv4_5))
{
- command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
- return ERROR_OK;
+ command_print(CMD_CTX, "current target isn't an ARM");
+ return ERROR_FAIL;
}
- if (argc > 0)
+ if (CMD_ARGC > 0)
{
- if (strcmp(args[0], "arm") == 0)
+ if (strcmp(CMD_ARGV[0], "arm") == 0)
{
armv4_5->core_state = ARMV4_5_STATE_ARM;
}
- if (strcmp(args[0], "thumb") == 0)
+ if (strcmp(CMD_ARGV[0], "thumb") == 0)
{
armv4_5->core_state = ARMV4_5_STATE_THUMB;
}
}
- command_print(cmd_ctx, "core state: %s", armv4_5_state_strings[armv4_5->core_state]);
+ command_print(CMD_CTX, "core state: %s", armv4_5_state_strings[armv4_5->core_state]);
return ERROR_OK;
}
COMMAND_HANDLER(handle_armv4_5_disassemble_command)
{
int retval = ERROR_OK;
- target_t *target = get_current_target(cmd_ctx);
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ struct target *target = get_current_target(CMD_CTX);
+ struct arm *arm = target ? target_to_arm(target) : NULL;
uint32_t address;
int count = 1;
- int i;
- arm_instruction_t cur_instruction;
- uint32_t opcode;
- uint16_t thumb_opcode;
int thumb = 0;
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
- {
- command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
- return ERROR_OK;
+ if (!is_arm(arm)) {
+ command_print(CMD_CTX, "current target isn't an ARM");
+ return ERROR_FAIL;
}
- switch (argc) {
+ switch (CMD_ARGC) {
case 3:
- if (strcmp(args[2], "thumb") != 0)
+ if (strcmp(CMD_ARGV[2], "thumb") != 0)
goto usage;
thumb = 1;
/* FALL THROUGH */
case 2:
- COMMAND_PARSE_NUMBER(int, args[1], count);
+ COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], count);
/* FALL THROUGH */
case 1:
- COMMAND_PARSE_NUMBER(u32, args[0], address);
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
if (address & 0x01) {
if (!thumb) {
- command_print(cmd_ctx, "Disassemble as Thumb");
+ command_print(CMD_CTX, "Disassemble as Thumb");
thumb = 1;
}
address &= ~1;
break;
default:
usage:
- command_print(cmd_ctx,
- "usage: armv4_5 disassemble <address> [<count> ['thumb']]");
- return ERROR_OK;
+ command_print(CMD_CTX,
+ "usage: arm disassemble <address> [<count> ['thumb']]");
+ count = 0;
+ retval = ERROR_FAIL;
}
- for (i = 0; i < count; i++)
- {
- if (thumb)
- {
- if ((retval = target_read_u16(target, address, &thumb_opcode)) != ERROR_OK)
- {
- return retval;
- }
- if ((retval = thumb_evaluate_opcode(thumb_opcode, address, &cur_instruction)) != ERROR_OK)
- {
- return retval;
- }
- }
- else {
- if ((retval = target_read_u32(target, address, &opcode)) != ERROR_OK)
- {
- return retval;
- }
- if ((retval = arm_evaluate_opcode(opcode, address, &cur_instruction)) != ERROR_OK)
- {
- return retval;
- }
+ while (count-- > 0) {
+ struct arm_instruction cur_instruction;
+
+ if (thumb) {
+ /* Always use Thumb2 disassembly for best handling
+ * of 32-bit BL/BLX, and to work with newer cores
+ * (some ARMv6, all ARMv7) that use Thumb2.
+ */
+ retval = thumb2_opcode(target, address,
+ &cur_instruction);
+ if (retval != ERROR_OK)
+ break;
+ } else {
+ uint32_t opcode;
+
+ retval = target_read_u32(target, address, &opcode);
+ if (retval != ERROR_OK)
+ break;
+ retval = arm_evaluate_opcode(opcode, address,
+ &cur_instruction) != ERROR_OK;
+ if (retval != ERROR_OK)
+ break;
}
- command_print(cmd_ctx, "%s", cur_instruction.text);
- address += (thumb) ? 2 : 4;
+ command_print(CMD_CTX, "%s", cur_instruction.text);
+ address += cur_instruction.instruction_size;
}
- return ERROR_OK;
+ return retval;
}
-int armv4_5_register_commands(struct command_context_s *cmd_ctx)
+static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
- command_t *armv4_5_cmd;
-
- armv4_5_cmd = register_command(cmd_ctx, NULL, "armv4_5",
- NULL, COMMAND_ANY,
- "armv4/5 specific commands");
-
- register_command(cmd_ctx, armv4_5_cmd, "reg",
- handle_armv4_5_reg_command, COMMAND_EXEC,
- "display ARM core registers");
- register_command(cmd_ctx, armv4_5_cmd, "core_state",
- handle_armv4_5_core_state_command, COMMAND_EXEC,
- "display/change ARM core state <arm | thumb>");
- register_command(cmd_ctx, armv4_5_cmd, "disassemble",
- handle_armv4_5_disassemble_command, COMMAND_EXEC,
- "disassemble instructions <address> [<count> ['thumb']]");
+ struct command_context *context;
+ struct target *target;
+ struct arm *arm;
+ int retval;
- return ERROR_OK;
+ context = Jim_GetAssocData(interp, "context");
+ if (context == NULL) {
+ LOG_ERROR("%s: no command context", __func__);
+ return JIM_ERR;
+ }
+ target = get_current_target(context);
+ if (target == NULL) {
+ LOG_ERROR("%s: no current target", __func__);
+ return JIM_ERR;
+ }
+ if (!target_was_examined(target)) {
+ LOG_ERROR("%s: not yet examined", target_name(target));
+ return JIM_ERR;
+ }
+ arm = target_to_arm(target);
+ if (!is_arm(arm)) {
+ LOG_ERROR("%s: not an ARM", target_name(target));
+ return JIM_ERR;
+ }
+
+ if ((argc < 6) || (argc > 7)) {
+ /* FIXME use the command name to verify # params... */
+ LOG_ERROR("%s: wrong number of arguments", __func__);
+ return JIM_ERR;
+ }
+
+ int cpnum;
+ uint32_t op1;
+ uint32_t op2;
+ uint32_t CRn;
+ uint32_t CRm;
+ uint32_t value;
+ long l;
+
+ /* NOTE: parameter sequence matches ARM instruction set usage:
+ * MCR pNUM, op1, rX, CRn, CRm, op2 ; write CP from rX
+ * MRC pNUM, op1, rX, CRn, CRm, op2 ; read CP into rX
+ * The "rX" is necessarily omitted; it uses Tcl mechanisms.
+ */
+ retval = Jim_GetLong(interp, argv[1], &l);
+ if (retval != JIM_OK)
+ return retval;
+ if (l & ~0xf) {
+ LOG_ERROR("%s: %s %d out of range", __func__,
+ "coprocessor", (int) l);
+ return JIM_ERR;
+ }
+ cpnum = l;
+
+ retval = Jim_GetLong(interp, argv[2], &l);
+ if (retval != JIM_OK)
+ return retval;
+ if (l & ~0x7) {
+ LOG_ERROR("%s: %s %d out of range", __func__,
+ "op1", (int) l);
+ return JIM_ERR;
+ }
+ op1 = l;
+
+ retval = Jim_GetLong(interp, argv[3], &l);
+ if (retval != JIM_OK)
+ return retval;
+ if (l & ~0xf) {
+ LOG_ERROR("%s: %s %d out of range", __func__,
+ "CRn", (int) l);
+ return JIM_ERR;
+ }
+ CRn = l;
+
+ retval = Jim_GetLong(interp, argv[4], &l);
+ if (retval != JIM_OK)
+ return retval;
+ if (l & ~0xf) {
+ LOG_ERROR("%s: %s %d out of range", __func__,
+ "CRm", (int) l);
+ return JIM_ERR;
+ }
+ CRm = l;
+
+ retval = Jim_GetLong(interp, argv[5], &l);
+ if (retval != JIM_OK)
+ return retval;
+ if (l & ~0x7) {
+ LOG_ERROR("%s: %s %d out of range", __func__,
+ "op2", (int) l);
+ return JIM_ERR;
+ }
+ op2 = l;
+
+ value = 0;
+
+ /* FIXME don't assume "mrc" vs "mcr" from the number of params;
+ * that could easily be a typo! Check both...
+ *
+ * FIXME change the call syntax here ... simplest to just pass
+ * the MRC() or MCR() instruction to be executed. That will also
+ * let us support the "mrc2" and "mcr2" opcodes (toggling one bit)
+ * if that's ever needed.
+ */
+ if (argc == 7) {
+ retval = Jim_GetLong(interp, argv[6], &l);
+ if (retval != JIM_OK) {
+ return retval;
+ }
+ value = l;
+
+ /* NOTE: parameters reordered! */
+ // ARMV4_5_MCR(cpnum, op1, 0, CRn, CRm, op2)
+ retval = arm->mcr(target, cpnum, op1, op2, CRn, CRm, value);
+ if (retval != ERROR_OK)
+ return JIM_ERR;
+ } else {
+ /* NOTE: parameters reordered! */
+ // ARMV4_5_MRC(cpnum, op1, 0, CRn, CRm, op2)
+ retval = arm->mrc(target, cpnum, op1, op2, CRn, CRm, &value);
+ if (retval != ERROR_OK)
+ return JIM_ERR;
+
+ Jim_SetResult(interp, Jim_NewIntObj(interp, value));
+ }
+
+ return JIM_OK;
}
-int armv4_5_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size)
+static const struct command_registration arm_exec_command_handlers[] = {
+ {
+ .name = "reg",
+ .handler = &handle_armv4_5_reg_command,
+ .mode = COMMAND_EXEC,
+ .help = "display ARM core registers",
+ },
+ {
+ .name = "core_state",
+ .handler = &handle_armv4_5_core_state_command,
+ .mode = COMMAND_EXEC,
+ .usage = "<arm | thumb>",
+ .help = "display/change ARM core state",
+ },
+ {
+ .name = "disassemble",
+ .handler = &handle_armv4_5_disassemble_command,
+ .mode = COMMAND_EXEC,
+ .usage = "<address> [<count> ['thumb']]",
+ .help = "disassemble instructions ",
+ },
+ {
+ .name = "mcr",
+ .mode = COMMAND_EXEC,
+ .jim_handler = &jim_mcrmrc,
+ .help = "write coprocessor register",
+ .usage = "cpnum op1 CRn op2 CRm value",
+ },
+ {
+ .name = "mrc",
+ .jim_handler = &jim_mcrmrc,
+ .help = "read coprocessor register",
+ .usage = "cpnum op1 CRn op2 CRm",
+ },
+
+ COMMAND_REGISTRATION_DONE
+};
+const struct command_registration arm_command_handlers[] = {
+ {
+ .name = "arm",
+ .mode = COMMAND_ANY,
+ .help = "ARM command group",
+ .chain = arm_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+int armv4_5_get_gdb_reg_list(struct target *target, struct reg **reg_list[], int *reg_list_size)
{
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ struct arm *armv4_5 = target_to_armv4_5(target);
int i;
- if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
+ if (!is_arm_mode(armv4_5->core_mode))
return ERROR_FAIL;
*reg_list_size = 26;
- *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size));
+ *reg_list = malloc(sizeof(struct reg*) * (*reg_list_size));
for (i = 0; i < 16; i++)
- {
- (*reg_list)[i] = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i);
- }
+ (*reg_list)[i] = arm_reg_current(armv4_5, i);
for (i = 16; i < 24; i++)
- {
- (*reg_list)[i] = &armv4_5_gdb_dummy_fp_reg;
- }
+ (*reg_list)[i] = &arm_gdb_dummy_fp_reg;
- (*reg_list)[24] = &armv4_5_gdb_dummy_fps_reg;
- (*reg_list)[25] = &armv4_5->core_cache->reg_list[ARMV4_5_CPSR];
+ (*reg_list)[24] = &arm_gdb_dummy_fps_reg;
+ (*reg_list)[25] = armv4_5->cpsr;
return ERROR_OK;
}
/* wait for execution to complete and check exit point */
-static int armv4_5_run_algorithm_completion(struct target_s *target, uint32_t exit_point, int timeout_ms, void *arch_info)
+static int armv4_5_run_algorithm_completion(struct target *target, uint32_t exit_point, int timeout_ms, void *arch_info)
{
int retval;
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
+ struct arm *armv4_5 = target_to_armv4_5(target);
if ((retval = target_wait_state(target, TARGET_HALTED, timeout_ms)) != ERROR_OK)
{
return ERROR_OK;
}
-int armv4_5_run_algorithm_inner(struct target_s *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info, int (*run_it)(struct target_s *target, uint32_t exit_point, int timeout_ms, void *arch_info))
+int armv4_5_run_algorithm_inner(struct target *target,
+ int num_mem_params, struct mem_param *mem_params,
+ int num_reg_params, struct reg_param *reg_params,
+ uint32_t entry_point, uint32_t exit_point,
+ int timeout_ms, void *arch_info,
+ int (*run_it)(struct target *target, uint32_t exit_point,
+ int timeout_ms, void *arch_info))
{
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
- armv4_5_algorithm_t *armv4_5_algorithm_info = arch_info;
+ struct arm *armv4_5 = target_to_armv4_5(target);
+ struct armv4_5_algorithm *armv4_5_algorithm_info = arch_info;
enum armv4_5_state core_state = armv4_5->core_state;
- enum armv4_5_mode core_mode = armv4_5->core_mode;
uint32_t context[17];
uint32_t cpsr;
int exit_breakpoint_size = 0;
int i;
int retval = ERROR_OK;
+
LOG_DEBUG("Running algorithm");
if (armv4_5_algorithm_info->common_magic != ARMV4_5_COMMON_MAGIC)
return ERROR_TARGET_NOT_HALTED;
}
- if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
+ if (!is_arm_mode(armv4_5->core_mode))
return ERROR_FAIL;
/* armv5 and later can terminate with BKPT instruction; less overhead */
return ERROR_FAIL;
}
+ /* save r0..pc, cpsr-or-spsr, and then cpsr-for-sure;
+ * they'll be restored later.
+ */
for (i = 0; i <= 16; i++)
{
- if (!ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid)
- armv4_5->read_core_reg(target, i, armv4_5_algorithm_info->core_mode);
- context[i] = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32);
+ struct reg *r;
+
+ r = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache,
+ armv4_5_algorithm_info->core_mode, i);
+ if (!r->valid)
+ armv4_5->read_core_reg(target, r, i,
+ armv4_5_algorithm_info->core_mode);
+ context[i] = buf_get_u32(r->value, 0, 32);
}
- cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32);
+ cpsr = buf_get_u32(armv4_5->cpsr->value, 0, 32);
for (i = 0; i < num_mem_params; i++)
{
for (i = 0; i < num_reg_params; i++)
{
- reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
+ struct reg *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if ((retval = armv4_5_set_core_reg(reg, reg_params[i].value)) != ERROR_OK)
else
{
LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
- exit(-1);
+ return ERROR_INVALID_ARGUMENTS;
}
if (armv4_5_algorithm_info->core_mode != ARMV4_5_MODE_ANY)
{
- LOG_DEBUG("setting core_mode: 0x%2.2x", armv4_5_algorithm_info->core_mode);
- buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 5, armv4_5_algorithm_info->core_mode);
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
+ LOG_DEBUG("setting core_mode: 0x%2.2x",
+ armv4_5_algorithm_info->core_mode);
+ buf_set_u32(armv4_5->cpsr->value, 0, 5,
+ armv4_5_algorithm_info->core_mode);
+ armv4_5->cpsr->dirty = 1;
+ armv4_5->cpsr->valid = 1;
}
/* terminate using a hardware or (ARMv5+) software breakpoint */
if (reg_params[i].direction != PARAM_OUT)
{
- reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
+ struct reg *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
if (!reg)
{
LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
- exit(-1);
+ retval = ERROR_INVALID_ARGUMENTS;
+ continue;
}
if (reg->size != reg_params[i].size)
{
LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
- exit(-1);
+ retval = ERROR_INVALID_ARGUMENTS;
+ continue;
}
buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
}
}
+ /* restore everything we saved before (17 or 18 registers) */
for (i = 0; i <= 16; i++)
{
uint32_t regvalue;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).dirty = 1;
}
}
- buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr);
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
+
+ arm_set_cpsr(armv4_5, cpsr);
+ armv4_5->cpsr->dirty = 1;
armv4_5->core_state = core_state;
- armv4_5->core_mode = core_mode;
return retval;
}
-int armv4_5_run_algorithm(struct target_s *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info)
+int armv4_5_run_algorithm(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info)
{
return armv4_5_run_algorithm_inner(target, num_mem_params, mem_params, num_reg_params, reg_params, entry_point, exit_point, timeout_ms, arch_info, armv4_5_run_algorithm_completion);
}
-int armv4_5_init_arch_info(target_t *target, armv4_5_common_t *armv4_5)
+/**
+ * Runs ARM code in the target to calculate a CRC32 checksum.
+ *
+ * \todo On ARMv5+, rely on BKPT termination for reduced overhead.
+ */
+int arm_checksum_memory(struct target *target,
+ uint32_t address, uint32_t count, uint32_t *checksum)
+{
+ struct working_area *crc_algorithm;
+ struct armv4_5_algorithm armv4_5_info;
+ struct reg_param reg_params[2];
+ int retval;
+ uint32_t i;
+
+ static const uint32_t arm_crc_code[] = {
+ 0xE1A02000, /* mov r2, r0 */
+ 0xE3E00000, /* mov r0, #0xffffffff */
+ 0xE1A03001, /* mov r3, r1 */
+ 0xE3A04000, /* mov r4, #0 */
+ 0xEA00000B, /* b ncomp */
+ /* nbyte: */
+ 0xE7D21004, /* ldrb r1, [r2, r4] */
+ 0xE59F7030, /* ldr r7, CRC32XOR */
+ 0xE0200C01, /* eor r0, r0, r1, asl 24 */
+ 0xE3A05000, /* mov r5, #0 */
+ /* loop: */
+ 0xE3500000, /* cmp r0, #0 */
+ 0xE1A06080, /* mov r6, r0, asl #1 */
+ 0xE2855001, /* add r5, r5, #1 */
+ 0xE1A00006, /* mov r0, r6 */
+ 0xB0260007, /* eorlt r0, r6, r7 */
+ 0xE3550008, /* cmp r5, #8 */
+ 0x1AFFFFF8, /* bne loop */
+ 0xE2844001, /* add r4, r4, #1 */
+ /* ncomp: */
+ 0xE1540003, /* cmp r4, r3 */
+ 0x1AFFFFF1, /* bne nbyte */
+ /* end: */
+ 0xEAFFFFFE, /* b end */
+ /* CRC32XOR: */
+ 0x04C11DB7 /* .word 0x04C11DB7 */
+ };
+
+ retval = target_alloc_working_area(target,
+ sizeof(arm_crc_code), &crc_algorithm);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* convert code into a buffer in target endianness */
+ for (i = 0; i < ARRAY_SIZE(arm_crc_code); i++) {
+ retval = target_write_u32(target,
+ crc_algorithm->address + i * sizeof(uint32_t),
+ arm_crc_code[i]);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
+ armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
+ armv4_5_info.core_state = ARMV4_5_STATE_ARM;
+
+ init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT);
+ init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
+
+ buf_set_u32(reg_params[0].value, 0, 32, address);
+ buf_set_u32(reg_params[1].value, 0, 32, count);
+
+ /* 20 second timeout/megabyte */
+ int timeout = 20000 * (1 + (count / (1024 * 1024)));
+
+ retval = target_run_algorithm(target, 0, NULL, 2, reg_params,
+ crc_algorithm->address,
+ crc_algorithm->address + sizeof(arm_crc_code) - 8,
+ timeout, &armv4_5_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("error executing ARM crc algorithm");
+ destroy_reg_param(®_params[0]);
+ destroy_reg_param(®_params[1]);
+ target_free_working_area(target, crc_algorithm);
+ return retval;
+ }
+
+ *checksum = buf_get_u32(reg_params[0].value, 0, 32);
+
+ destroy_reg_param(®_params[0]);
+ destroy_reg_param(®_params[1]);
+
+ target_free_working_area(target, crc_algorithm);
+
+ return ERROR_OK;
+}
+
+/**
+ * Runs ARM code in the target to check whether a memory block holds
+ * all ones. NOR flash which has been erased, and thus may be written,
+ * holds all ones.
+ *
+ * \todo On ARMv5+, rely on BKPT termination for reduced overhead.
+ */
+int arm_blank_check_memory(struct target *target,
+ uint32_t address, uint32_t count, uint32_t *blank)
+{
+ struct working_area *check_algorithm;
+ struct reg_param reg_params[3];
+ struct armv4_5_algorithm armv4_5_info;
+ int retval;
+ uint32_t i;
+
+ static const uint32_t check_code[] = {
+ /* loop: */
+ 0xe4d03001, /* ldrb r3, [r0], #1 */
+ 0xe0022003, /* and r2, r2, r3 */
+ 0xe2511001, /* subs r1, r1, #1 */
+ 0x1afffffb, /* bne loop */
+ /* end: */
+ 0xeafffffe /* b end */
+ };
+
+ /* make sure we have a working area */
+ retval = target_alloc_working_area(target,
+ sizeof(check_code), &check_algorithm);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* convert code into a buffer in target endianness */
+ for (i = 0; i < ARRAY_SIZE(check_code); i++) {
+ retval = target_write_u32(target,
+ check_algorithm->address
+ + i * sizeof(uint32_t),
+ check_code[i]);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
+ armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
+ armv4_5_info.core_state = ARMV4_5_STATE_ARM;
+
+ init_reg_param(®_params[0], "r0", 32, PARAM_OUT);
+ buf_set_u32(reg_params[0].value, 0, 32, address);
+
+ init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
+ buf_set_u32(reg_params[1].value, 0, 32, count);
+
+ init_reg_param(®_params[2], "r2", 32, PARAM_IN_OUT);
+ buf_set_u32(reg_params[2].value, 0, 32, 0xff);
+
+ retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
+ check_algorithm->address,
+ check_algorithm->address + sizeof(check_code) - 4,
+ 10000, &armv4_5_info);
+ if (retval != ERROR_OK) {
+ destroy_reg_param(®_params[0]);
+ destroy_reg_param(®_params[1]);
+ destroy_reg_param(®_params[2]);
+ target_free_working_area(target, check_algorithm);
+ return retval;
+ }
+
+ *blank = buf_get_u32(reg_params[2].value, 0, 32);
+
+ destroy_reg_param(®_params[0]);
+ destroy_reg_param(®_params[1]);
+ destroy_reg_param(®_params[2]);
+
+ target_free_working_area(target, check_algorithm);
+
+ return ERROR_OK;
+}
+
+static int arm_full_context(struct target *target)
+{
+ struct arm *armv4_5 = target_to_armv4_5(target);
+ unsigned num_regs = armv4_5->core_cache->num_regs;
+ struct reg *reg = armv4_5->core_cache->reg_list;
+ int retval = ERROR_OK;
+
+ for (; num_regs && retval == ERROR_OK; num_regs--, reg++) {
+ if (reg->valid)
+ continue;
+ retval = armv4_5_get_core_reg(reg);
+ }
+ return retval;
+}
+
+static int arm_default_mrc(struct target *target, int cpnum,
+ uint32_t op1, uint32_t op2,
+ uint32_t CRn, uint32_t CRm,
+ uint32_t *value)
+{
+ LOG_ERROR("%s doesn't implement MRC", target_type_name(target));
+ return ERROR_FAIL;
+}
+
+static int arm_default_mcr(struct target *target, int cpnum,
+ uint32_t op1, uint32_t op2,
+ uint32_t CRn, uint32_t CRm,
+ uint32_t value)
+{
+ LOG_ERROR("%s doesn't implement MCR", target_type_name(target));
+ return ERROR_FAIL;
+}
+
+int armv4_5_init_arch_info(struct target *target, struct arm *armv4_5)
{
target->arch_info = armv4_5;
+ armv4_5->target = target;
armv4_5->common_magic = ARMV4_5_COMMON_MAGIC;
- armv4_5->core_state = ARMV4_5_STATE_ARM;
- armv4_5->core_mode = ARMV4_5_MODE_USR;
+ arm_set_cpsr(armv4_5, ARMV4_5_MODE_USR);
+
+ /* core_type may be overridden by subtype logic */
+ armv4_5->core_type = ARMV4_5_MODE_ANY;
+
+ /* default full_context() has no core-specific optimizations */
+ if (!armv4_5->full_context && armv4_5->read_core_reg)
+ armv4_5->full_context = arm_full_context;
+
+ if (!armv4_5->mrc)
+ armv4_5->mrc = arm_default_mrc;
+ if (!armv4_5->mcr)
+ armv4_5->mcr = arm_default_mcr;
return ERROR_OK;
}
projects / fw / openocd / blobdiff