+// SPDX-License-Identifier: GPL-2.0-or-later
+
/*
* Copyright (C) 2009 by David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the
- * Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "arm.h"
#include "arm_dpm.h"
+#include "armv8_dpm.h"
#include <jtag/jtag.h>
#include "register.h"
#include "breakpoints.h"
/* Read coprocessor */
static int dpm_mrc(struct target *target, int cpnum,
- uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm,
- uint32_t *value)
+ uint32_t op1, uint32_t op2, uint32_t crn, uint32_t crm,
+ uint32_t *value)
{
struct arm *arm = target_to_arm(target);
struct arm_dpm *dpm = arm->dpm;
return retval;
LOG_DEBUG("MRC p%d, %d, r0, c%d, c%d, %d", cpnum,
- (int) op1, (int) CRn,
- (int) CRm, (int) op2);
+ (int) op1, (int) crn,
+ (int) crm, (int) op2);
/* read coprocessor register into R0; return via DCC */
retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(cpnum, op1, 0, CRn, CRm, op2),
+ ARMV4_5_MRC(cpnum, op1, 0, crn, crm, op2),
value);
/* (void) */ dpm->finish(dpm);
}
static int dpm_mcr(struct target *target, int cpnum,
- uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm,
- uint32_t value)
+ uint32_t op1, uint32_t op2, uint32_t crn, uint32_t crm,
+ uint32_t value)
{
struct arm *arm = target_to_arm(target);
struct arm_dpm *dpm = arm->dpm;
return retval;
LOG_DEBUG("MCR p%d, %d, r0, c%d, c%d, %d", cpnum,
- (int) op1, (int) CRn,
- (int) CRm, (int) op2);
+ (int) op1, (int) crn,
+ (int) crm, (int) op2);
/* read DCC into r0; then write coprocessor register from R0 */
retval = dpm->instr_write_data_r0(dpm,
- ARMV4_5_MCR(cpnum, op1, 0, CRn, CRm, op2),
+ ARMV4_5_MCR(cpnum, op1, 0, crn, crm, op2),
value);
/* (void) */ dpm->finish(dpm);
/* Toggles between recorded core mode (USR, SVC, etc) and a temporary one.
* Routines *must* restore the original mode before returning!!
*/
-int dpm_modeswitch(struct arm_dpm *dpm, enum arm_mode mode)
+int arm_dpm_modeswitch(struct arm_dpm *dpm, enum arm_mode mode)
{
int retval;
uint32_t cpsr;
return retval;
}
+/* Read 64bit VFP registers */
+static int dpm_read_reg_u64(struct arm_dpm *dpm, struct reg *r, unsigned regnum)
+{
+ int retval = ERROR_FAIL;
+ uint32_t value_r0, value_r1;
+
+ switch (regnum) {
+ case ARM_VFP_V3_D0 ... ARM_VFP_V3_D31:
+ /* move from double word register to r0:r1: "vmov r0, r1, vm"
+ * then read r0 via dcc
+ */
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_VMOV(1, 1, 0, ((regnum - ARM_VFP_V3_D0) >> 4),
+ ((regnum - ARM_VFP_V3_D0) & 0xf)), &value_r0);
+ if (retval != ERROR_OK)
+ break;
+
+ /* read r1 via dcc */
+ retval = dpm->instr_read_data_dcc(dpm,
+ ARMV4_5_MCR(14, 0, 1, 0, 5, 0),
+ &value_r1);
+ break;
+ default:
+
+ break;
+ }
+
+ if (retval == ERROR_OK) {
+ buf_set_u32(r->value, 0, 32, value_r0);
+ buf_set_u32(r->value + 4, 0, 32, value_r1);
+ r->valid = true;
+ r->dirty = false;
+ LOG_DEBUG("READ: %s, %8.8x, %8.8x", r->name,
+ (unsigned) value_r0, (unsigned) value_r1);
+ }
+
+ return retval;
+}
+
/* just read the register -- rely on the core mode being right */
-static int dpm_read_reg(struct arm_dpm *dpm, struct reg *r, unsigned regnum)
+int arm_dpm_read_reg(struct arm_dpm *dpm, struct reg *r, unsigned regnum)
{
uint32_t value;
int retval;
switch (regnum) {
- case 0 ... 14:
- /* return via DCC: "MCR p14, 0, Rnum, c0, c5, 0" */
- retval = dpm->instr_read_data_dcc(dpm,
+ case 0 ... 14:
+ /* return via DCC: "MCR p14, 0, Rnum, c0, c5, 0" */
+ retval = dpm->instr_read_data_dcc(dpm,
ARMV4_5_MCR(14, 0, regnum, 0, 5, 0),
&value);
- break;
- case 15: /* PC */
- /* "MOV r0, pc"; then return via DCC */
- retval = dpm->instr_read_data_r0(dpm, 0xe1a0000f, &value);
-
- /* NOTE: this seems like a slightly awkward place to update
- * this value ... but if the PC gets written (the only way
- * to change what we compute), the arch spec says subsequent
- * reads return values which are "unpredictable". So this
- * is always right except in those broken-by-intent cases.
- */
- switch (dpm->arm->core_state) {
- case ARM_STATE_ARM:
- value -= 8;
break;
- case ARM_STATE_THUMB:
- case ARM_STATE_THUMB_EE:
- value -= 4;
+ case 15:/* PC
+ * "MOV r0, pc"; then return via DCC */
+ retval = dpm->instr_read_data_r0(dpm, 0xe1a0000f, &value);
+
+ /* NOTE: this seems like a slightly awkward place to update
+ * this value ... but if the PC gets written (the only way
+ * to change what we compute), the arch spec says subsequent
+ * reads return values which are "unpredictable". So this
+ * is always right except in those broken-by-intent cases.
+ */
+ switch (dpm->arm->core_state) {
+ case ARM_STATE_ARM:
+ value -= 8;
+ break;
+ case ARM_STATE_THUMB:
+ case ARM_STATE_THUMB_EE:
+ value -= 4;
+ break;
+ case ARM_STATE_JAZELLE:
+ /* core-specific ... ? */
+ LOG_WARNING("Jazelle PC adjustment unknown");
+ break;
+ default:
+ LOG_WARNING("unknown core state");
+ break;
+ }
break;
- case ARM_STATE_JAZELLE:
- /* core-specific ... ? */
- LOG_WARNING("Jazelle PC adjustment unknown");
+ case ARM_VFP_V3_D0 ... ARM_VFP_V3_D31:
+ return dpm_read_reg_u64(dpm, r, regnum);
+ case ARM_VFP_V3_FPSCR:
+ /* "VMRS r0, FPSCR"; then return via DCC */
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_VMRS(0), &value);
break;
- }
- break;
- default:
- /* 16: "MRS r0, CPSR"; then return via DCC
- * 17: "MRS r0, SPSR"; then return via DCC
- */
- retval = dpm->instr_read_data_r0(dpm,
+ default:
+ /* 16: "MRS r0, CPSR"; then return via DCC
+ * 17: "MRS r0, SPSR"; then return via DCC
+ */
+ retval = dpm->instr_read_data_r0(dpm,
ARMV4_5_MRS(0, regnum & 1),
&value);
- break;
+ break;
}
if (retval == ERROR_OK) {
return retval;
}
+/* Write 64bit VFP registers */
+static int dpm_write_reg_u64(struct arm_dpm *dpm, struct reg *r, unsigned regnum)
+{
+ int retval = ERROR_FAIL;
+ uint32_t value_r0 = buf_get_u32(r->value, 0, 32);
+ uint32_t value_r1 = buf_get_u32(r->value + 4, 0, 32);
+
+ switch (regnum) {
+ case ARM_VFP_V3_D0 ... ARM_VFP_V3_D31:
+ /* write value_r1 to r1 via dcc */
+ retval = dpm->instr_write_data_dcc(dpm,
+ ARMV4_5_MRC(14, 0, 1, 0, 5, 0),
+ value_r1);
+ if (retval != ERROR_OK)
+ break;
+
+ /* write value_r0 to r0 via dcc then,
+ * move to double word register from r0:r1: "vmov vm, r0, r1"
+ */
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_VMOV(0, 1, 0, ((regnum - ARM_VFP_V3_D0) >> 4),
+ ((regnum - ARM_VFP_V3_D0) & 0xf)), value_r0);
+ break;
+ default:
+
+ break;
+ }
+
+ if (retval == ERROR_OK) {
+ r->dirty = false;
+ LOG_DEBUG("WRITE: %s, %8.8x, %8.8x", r->name,
+ (unsigned) value_r0, (unsigned) value_r1);
+ }
+
+ return retval;
+}
+
/* just write the register -- rely on the core mode being right */
static int dpm_write_reg(struct arm_dpm *dpm, struct reg *r, unsigned regnum)
{
uint32_t value = buf_get_u32(r->value, 0, 32);
switch (regnum) {
- case 0 ... 14:
- /* load register from DCC: "MRC p14, 0, Rnum, c0, c5, 0" */
- retval = dpm->instr_write_data_dcc(dpm,
+ case 0 ... 14:
+ /* load register from DCC: "MRC p14, 0, Rnum, c0, c5, 0" */
+ retval = dpm->instr_write_data_dcc(dpm,
ARMV4_5_MRC(14, 0, regnum, 0, 5, 0),
value);
- break;
- case 15: /* PC */
- /* read r0 from DCC; then "MOV pc, r0" */
- retval = dpm->instr_write_data_r0(dpm, 0xe1a0f000, value);
- break;
- default:
- /* 16: read r0 from DCC, then "MSR r0, CPSR_cxsf"
- * 17: read r0 from DCC, then "MSR r0, SPSR_cxsf"
- */
- retval = dpm->instr_write_data_r0(dpm,
+ break;
+ case 15:/* PC
+ * read r0 from DCC; then "MOV pc, r0" */
+ retval = dpm->instr_write_data_r0(dpm, 0xe1a0f000, value);
+ break;
+ case ARM_VFP_V3_D0 ... ARM_VFP_V3_D31:
+ return dpm_write_reg_u64(dpm, r, regnum);
+ case ARM_VFP_V3_FPSCR:
+ /* move to r0 from DCC, then "VMSR FPSCR, r0" */
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_VMSR(0), value);
+ break;
+ default:
+ /* 16: read r0 from DCC, then "MSR r0, CPSR_cxsf"
+ * 17: read r0 from DCC, then "MSR r0, SPSR_cxsf"
+ */
+ retval = dpm->instr_write_data_r0(dpm,
ARMV4_5_MSR_GP(0, 0xf, regnum & 1),
value);
- if (retval != ERROR_OK)
- return retval;
+ if (retval != ERROR_OK)
+ return retval;
- if (regnum == 16 && dpm->instr_cpsr_sync)
- retval = dpm->instr_cpsr_sync(dpm);
+ if (regnum == 16 && dpm->instr_cpsr_sync)
+ retval = dpm->instr_cpsr_sync(dpm);
- break;
+ break;
}
if (retval == ERROR_OK) {
}
/**
- * Read basic registers of the the current context: R0 to R15, and CPSR;
+ * Write to program counter and switch the core state (arm/thumb) according to
+ * the address.
+ */
+static int dpm_write_pc_core_state(struct arm_dpm *dpm, struct reg *r)
+{
+ uint32_t value = buf_get_u32(r->value, 0, 32);
+
+ /* read r0 from DCC; then "BX r0" */
+ return dpm->instr_write_data_r0(dpm, ARMV4_5_BX(0), value);
+}
+
+/**
+ * Read basic registers of the current context: R0 to R15, and CPSR;
* sets the core mode (such as USR or IRQ) and state (such as ARM or Thumb).
* In normal operation this is called on entry to halting debug state,
* possibly after some other operations supporting restore of debug state
if (retval != ERROR_OK)
return retval;
- /* read R0 first (it's used for scratch), then CPSR */
- r = arm->core_cache->reg_list + 0;
- if (!r->valid) {
- retval = dpm_read_reg(dpm, r, 0);
- if (retval != ERROR_OK)
- goto fail;
+ /* read R0 and R1 first (it's used for scratch), then CPSR */
+ for (unsigned i = 0; i < 2; i++) {
+ r = arm->core_cache->reg_list + i;
+ if (!r->valid) {
+ retval = arm_dpm_read_reg(dpm, r, i);
+ if (retval != ERROR_OK)
+ goto fail;
+ }
+ r->dirty = true;
}
- r->dirty = true;
retval = dpm->instr_read_data_r0(dpm, ARMV4_5_MRS(0, 0), &cpsr);
if (retval != ERROR_OK)
arm_set_cpsr(arm, cpsr);
/* REVISIT we can probably avoid reading R1..R14, saving time... */
- for (unsigned i = 1; i < 16; i++) {
+ for (unsigned i = 2; i < 16; i++) {
r = arm_reg_current(arm, i);
if (r->valid)
continue;
- retval = dpm_read_reg(dpm, r, i);
+ retval = arm_dpm_read_reg(dpm, r, i);
if (retval != ERROR_OK)
goto fail;
}
* or running debugger code.
*/
static int dpm_maybe_update_bpwp(struct arm_dpm *dpm, bool bpwp,
- struct dpm_bpwp *xp, int *set_p)
+ struct dpm_bpwp *xp, bool *set_p)
{
int retval = ERROR_OK;
bool disable;
if (retval != ERROR_OK)
LOG_ERROR("%s: can't %s HW %spoint %d",
- disable ? "disable" : "enable",
- target_name(dpm->arm->target),
- (xp->number < 16) ? "break" : "watch",
- xp->number & 0xf);
+ disable ? "disable" : "enable",
+ target_name(dpm->arm->target),
+ (xp->number < 16) ? "break" : "watch",
+ xp->number & 0xf);
done:
return retval;
}
struct breakpoint *bp = dbp->bp;
retval = dpm_maybe_update_bpwp(dpm, bpwp, &dbp->bpwp,
- bp ? &bp->set : NULL);
+ bp ? &bp->is_set : NULL);
if (retval != ERROR_OK)
goto done;
}
struct watchpoint *wp = dwp->wp;
retval = dpm_maybe_update_bpwp(dpm, bpwp, &dwp->bpwp,
- wp ? &wp->set : NULL);
+ wp ? &wp->is_set : NULL);
if (retval != ERROR_OK)
goto done;
}
did_write = false;
- /* check everything except our scratch register R0 */
- for (unsigned i = 1; i < cache->num_regs; i++) {
+ /* check everything except our scratch registers R0 and R1 */
+ for (unsigned i = 2; i < cache->num_regs; i++) {
struct arm_reg *r;
unsigned regnum;
continue;
if (arm->cpsr == cache->reg_list + i)
continue;
- if (!cache->reg_list[i].dirty)
+ if (!cache->reg_list[i].exist || !cache->reg_list[i].dirty)
continue;
r = cache->reg_list[i].arch_info;
* since we haven't changed it yet
*/
if (arm->core_mode == ARM_MODE_FIQ
- && ARM_MODE_ANY
- != mode)
+ && ARM_MODE_ANY
+ != mode)
tmode = ARM_MODE_USR;
break;
case 16:
}
/* REVISIT error checks */
- if (tmode != ARM_MODE_ANY)
- {
- retval = dpm_modeswitch(dpm, tmode);
+ if (tmode != ARM_MODE_ANY) {
+ retval = arm_dpm_modeswitch(dpm, tmode);
if (retval != ERROR_OK)
goto done;
}
continue;
retval = dpm_write_reg(dpm,
- &cache->reg_list[i],
- regnum);
+ &cache->reg_list[i],
+ regnum);
if (retval != ERROR_OK)
goto done;
}
* or it's dirty. Must write PC to ensure the return address is
* defined, and must not write it before CPSR.
*/
- retval = dpm_modeswitch(dpm, ARM_MODE_ANY);
+ retval = arm_dpm_modeswitch(dpm, ARM_MODE_ANY);
if (retval != ERROR_OK)
goto done;
arm->cpsr->dirty = false;
+ /* restore the PC, make sure to also switch the core state
+ * to whatever it was set to with "arm core_state" command.
+ * target code will have set PC to an appropriate resume address.
+ */
+ retval = dpm_write_pc_core_state(dpm, arm->pc);
+ if (retval != ERROR_OK)
+ goto done;
+ /* on Cortex-A5 (as found on NXP VF610 SoC), BX instruction
+ * executed in debug state doesn't appear to set the PC,
+ * explicitly set it with a "MOV pc, r0". This doesn't influence
+ * CPSR on Cortex-A9 so it should be OK. Maybe due to different
+ * debug version?
+ */
retval = dpm_write_reg(dpm, arm->pc, 15);
if (retval != ERROR_OK)
goto done;
arm->pc->dirty = false;
- /* flush R0 -- it's *very* dirty by now */
- retval = dpm_write_reg(dpm, &cache->reg_list[0], 0);
- if (retval != ERROR_OK)
- goto done;
- cache->reg_list[0].dirty = false;
+ /* flush R0 and R1 (our scratch registers) */
+ for (unsigned i = 0; i < 2; i++) {
+ retval = dpm_write_reg(dpm, &cache->reg_list[i], i);
+ if (retval != ERROR_OK)
+ goto done;
+ cache->reg_list[i].dirty = false;
+ }
/* (void) */ dpm->finish(dpm);
done:
* or MODE_ANY.
*/
static enum arm_mode dpm_mapmode(struct arm *arm,
- unsigned num, enum arm_mode mode)
+ unsigned num, enum arm_mode mode)
{
enum arm_mode amode = arm->core_mode;
/* don't switch if the mode is already correct */
if (amode == ARM_MODE_SYS)
- amode = ARM_MODE_USR;
+ amode = ARM_MODE_USR;
if (mode == amode)
return ARM_MODE_ANY;
switch (num) {
- /* don't switch for non-shadowed registers (r0..r7, r15/pc, cpsr) */
- case 0 ... 7:
- case 15:
- case 16:
- break;
- /* r8..r12 aren't shadowed for anything except FIQ */
- case 8 ... 12:
- if (mode == ARM_MODE_FIQ)
+ /* don't switch for non-shadowed registers (r0..r7, r15/pc, cpsr) */
+ case 0 ... 7:
+ case 15:
+ case 16:
+ break;
+ /* r8..r12 aren't shadowed for anything except FIQ */
+ case 8 ... 12:
+ if (mode == ARM_MODE_FIQ)
+ return mode;
+ break;
+ /* r13/sp, and r14/lr are always shadowed */
+ case 13:
+ case 14:
+ case ARM_VFP_V3_D0 ... ARM_VFP_V3_FPSCR:
return mode;
- break;
- /* r13/sp, and r14/lr are always shadowed */
- case 13:
- case 14:
- return mode;
- default:
- LOG_WARNING("invalid register #%u", num);
- break;
+ default:
+ LOG_WARNING("invalid register #%u", num);
+ break;
}
return ARM_MODE_ANY;
}
*/
static int arm_dpm_read_core_reg(struct target *target, struct reg *r,
- int regnum, enum arm_mode mode)
+ int regnum, enum arm_mode mode)
{
struct arm_dpm *dpm = target_to_arm(target)->dpm;
int retval;
- if (regnum < 0 || regnum > 16)
- return ERROR_INVALID_ARGUMENTS;
+ if (regnum < 0 || (regnum > 16 && regnum < ARM_VFP_V3_D0) ||
+ (regnum > ARM_VFP_V3_FPSCR))
+ return ERROR_COMMAND_SYNTAX_ERROR;
if (regnum == 16) {
if (mode != ARM_MODE_ANY)
return retval;
if (mode != ARM_MODE_ANY) {
- retval = dpm_modeswitch(dpm, mode);
+ retval = arm_dpm_modeswitch(dpm, mode);
if (retval != ERROR_OK)
goto fail;
}
- retval = dpm_read_reg(dpm, r, regnum);
+ retval = arm_dpm_read_reg(dpm, r, regnum);
if (retval != ERROR_OK)
goto fail;
/* always clean up, regardless of error */
if (mode != ARM_MODE_ANY)
- /* (void) */ dpm_modeswitch(dpm, ARM_MODE_ANY);
+ /* (void) */ arm_dpm_modeswitch(dpm, ARM_MODE_ANY);
fail:
/* (void) */ dpm->finish(dpm);
}
static int arm_dpm_write_core_reg(struct target *target, struct reg *r,
- int regnum, enum arm_mode mode, uint32_t value)
+ int regnum, enum arm_mode mode, uint8_t *value)
{
struct arm_dpm *dpm = target_to_arm(target)->dpm;
int retval;
- if (regnum < 0 || regnum > 16)
- return ERROR_INVALID_ARGUMENTS;
+ if (regnum < 0 || (regnum > 16 && regnum < ARM_VFP_V3_D0) ||
+ (regnum > ARM_VFP_V3_FPSCR))
+ return ERROR_COMMAND_SYNTAX_ERROR;
if (regnum == 16) {
if (mode != ARM_MODE_ANY)
return retval;
if (mode != ARM_MODE_ANY) {
- retval = dpm_modeswitch(dpm, mode);
+ retval = arm_dpm_modeswitch(dpm, mode);
if (retval != ERROR_OK)
goto fail;
}
/* always clean up, regardless of error */
if (mode != ARM_MODE_ANY)
- /* (void) */ dpm_modeswitch(dpm, ARM_MODE_ANY);
+ /* (void) */ arm_dpm_modeswitch(dpm, ARM_MODE_ANY);
fail:
/* (void) */ dpm->finish(dpm);
for (unsigned i = 0; i < cache->num_regs; i++) {
struct arm_reg *r;
- if (cache->reg_list[i].valid)
+ if (!cache->reg_list[i].exist || cache->reg_list[i].valid)
continue;
r = cache->reg_list[i].arch_info;
did_read = true;
mode = r->mode;
- /* For R8..R12 when we've entered debug
- * state in FIQ mode... patch mode.
+ /* For regular (ARM_MODE_ANY) R8..R12
+ * in case we've entered debug state
+ * in FIQ mode we need to patch mode.
*/
- if (mode == ARM_MODE_ANY)
- mode = ARM_MODE_USR;
+ if (mode != ARM_MODE_ANY)
+ retval = arm_dpm_modeswitch(dpm, mode);
+ else
+ retval = arm_dpm_modeswitch(dpm, ARM_MODE_USR);
- /* REVISIT error checks */
- retval = dpm_modeswitch(dpm, mode);
if (retval != ERROR_OK)
goto done;
}
continue;
/* CPSR was read, so "R16" must mean SPSR */
- retval = dpm_read_reg(dpm,
+ retval = arm_dpm_read_reg(dpm,
&cache->reg_list[i],
(r->num == 16) ? 17 : r->num);
if (retval != ERROR_OK)
} while (did_read);
- retval = dpm_modeswitch(dpm, ARM_MODE_ANY);
+ retval = arm_dpm_modeswitch(dpm, ARM_MODE_ANY);
/* (void) */ dpm->finish(dpm);
done:
return retval;
*/
static int dpm_bpwp_setup(struct arm_dpm *dpm, struct dpm_bpwp *xp,
- uint32_t addr, uint32_t length)
+ uint32_t addr, uint32_t length)
{
uint32_t control;
* v7 hardware, unaligned 4-byte ones too.
*/
switch (length) {
- case 1:
- control |= (1 << (addr & 3)) << 5;
- break;
- case 2:
- /* require 2-byte alignment */
- if (!(addr & 1)) {
- control |= (3 << (addr & 2)) << 5;
+ case 1:
+ control |= (1 << (addr & 3)) << 5;
break;
- }
+ case 2:
+ /* require 2-byte alignment */
+ if (!(addr & 1)) {
+ control |= (3 << (addr & 2)) << 5;
+ break;
+ }
/* FALL THROUGH */
- case 4:
- /* require 4-byte alignment */
- if (!(addr & 3)) {
- control |= 0xf << 5;
- break;
- }
+ case 4:
+ /* require 4-byte alignment */
+ if (!(addr & 3)) {
+ control |= 0xf << 5;
+ break;
+ }
/* FALL THROUGH */
- default:
- LOG_ERROR("unsupported {break,watch}point length/alignment");
- return ERROR_INVALID_ARGUMENTS;
+ default:
+ LOG_ERROR("unsupported {break,watch}point length/alignment");
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
/* other shared control bits:
xp->dirty = true;
LOG_DEBUG("BPWP: addr %8.8" PRIx32 ", control %" PRIx32 ", number %d",
- xp->address, control, xp->number);
+ xp->address, control, xp->number);
/* hardware is updated in write_dirty_registers() */
return ERROR_OK;
int retval = ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
if (bp->length < 2)
- return ERROR_INVALID_ARGUMENTS;
+ return ERROR_COMMAND_SYNTAX_ERROR;
if (!dpm->bpwp_enable)
return retval;
{
struct arm *arm = target_to_arm(target);
struct arm_dpm *dpm = arm->dpm;
- int retval = ERROR_INVALID_ARGUMENTS;
+ int retval = ERROR_COMMAND_SYNTAX_ERROR;
for (unsigned i = 0; i < dpm->nbp; i++) {
if (dpm->dbp[i].bp == bp) {
}
static int dpm_watchpoint_setup(struct arm_dpm *dpm, unsigned index_t,
- struct watchpoint *wp)
+ struct watchpoint *wp)
{
int retval;
struct dpm_wp *dwp = dpm->dwp + index_t;
control = dwp->bpwp.control;
switch (wp->rw) {
- case WPT_READ:
- control |= 1 << 3;
- break;
- case WPT_WRITE:
- control |= 2 << 3;
- break;
- case WPT_ACCESS:
- control |= 3 << 3;
- break;
+ case WPT_READ:
+ control |= 1 << 3;
+ break;
+ case WPT_WRITE:
+ control |= 2 << 3;
+ break;
+ case WPT_ACCESS:
+ control |= 3 << 3;
+ break;
}
dwp->bpwp.control = control;
{
struct arm *arm = target_to_arm(target);
struct arm_dpm *dpm = arm->dpm;
- int retval = ERROR_INVALID_ARGUMENTS;
+ int retval = ERROR_COMMAND_SYNTAX_ERROR;
for (unsigned i = 0; i < dpm->nwp; i++) {
if (dpm->dwp[i].wp == wp) {
void arm_dpm_report_wfar(struct arm_dpm *dpm, uint32_t addr)
{
switch (dpm->arm->core_state) {
- case ARM_STATE_ARM:
- addr -= 8;
- break;
- case ARM_STATE_THUMB:
- case ARM_STATE_THUMB_EE:
- addr -= 4;
- break;
- case ARM_STATE_JAZELLE:
- /* ?? */
- break;
+ case ARM_STATE_ARM:
+ addr -= 8;
+ break;
+ case ARM_STATE_THUMB:
+ case ARM_STATE_THUMB_EE:
+ addr -= 4;
+ break;
+ case ARM_STATE_JAZELLE:
+ case ARM_STATE_AARCH64:
+ /* ?? */
+ break;
}
- dpm->wp_pc = addr;
+ dpm->wp_addr = addr;
}
/*----------------------------------------------------------------------*/
/* Examine debug reason */
switch (DSCR_ENTRY(dscr)) {
- case 6: /* Data abort (v6 only) */
- case 7: /* Prefetch abort (v6 only) */
- /* FALL THROUGH -- assume a v6 core in abort mode */
- case 0: /* HALT request from debugger */
- case 4: /* EDBGRQ */
- target->debug_reason = DBG_REASON_DBGRQ;
- break;
- case 1: /* HW breakpoint */
- case 3: /* SW BKPT */
- case 5: /* vector catch */
- target->debug_reason = DBG_REASON_BREAKPOINT;
- break;
- case 2: /* asynch watchpoint */
- case 10: /* precise watchpoint */
- target->debug_reason = DBG_REASON_WATCHPOINT;
- break;
- default:
- target->debug_reason = DBG_REASON_UNDEFINED;
- break;
+ case DSCR_ENTRY_HALT_REQ: /* HALT request from debugger */
+ case DSCR_ENTRY_EXT_DBG_REQ: /* EDBGRQ */
+ target->debug_reason = DBG_REASON_DBGRQ;
+ break;
+ case DSCR_ENTRY_BREAKPOINT: /* HW breakpoint */
+ case DSCR_ENTRY_BKPT_INSTR: /* vector catch */
+ target->debug_reason = DBG_REASON_BREAKPOINT;
+ break;
+ case DSCR_ENTRY_IMPRECISE_WATCHPT: /* asynch watchpoint */
+ case DSCR_ENTRY_PRECISE_WATCHPT:/* precise watchpoint */
+ target->debug_reason = DBG_REASON_WATCHPOINT;
+ break;
+ default:
+ target->debug_reason = DBG_REASON_UNDEFINED;
+ break;
}
}
{
struct arm *arm = dpm->arm;
struct target *target = arm->target;
- struct reg_cache *cache;
+ struct reg_cache *cache = 0;
arm->dpm = dpm;
arm->read_core_reg = arm_dpm_read_core_reg;
arm->write_core_reg = arm_dpm_write_core_reg;
- cache = arm_build_reg_cache(target, arm);
- if (!cache)
- return ERROR_FAIL;
+ if (!arm->core_cache) {
+ cache = arm_build_reg_cache(target, arm);
+ if (!cache)
+ return ERROR_FAIL;
- *register_get_last_cache_p(&target->reg_cache) = cache;
+ *register_get_last_cache_p(&target->reg_cache) = cache;
+ }
/* coprocessor access setup */
arm->mrc = dpm_mrc;
target->type->remove_breakpoint = dpm_remove_breakpoint;
}
- /* watchpoint setup */
- target->type->add_watchpoint = dpm_add_watchpoint;
- target->type->remove_watchpoint = dpm_remove_watchpoint;
+ /* watchpoint setup -- optional until it works everywhere */
+ if (!target->type->add_watchpoint) {
+ target->type->add_watchpoint = dpm_add_watchpoint;
+ target->type->remove_watchpoint = dpm_remove_watchpoint;
+ }
/* FIXME add vector catch support */
dpm->nbp = 1 + ((dpm->didr >> 24) & 0xf);
- dpm->dbp = calloc(dpm->nbp, sizeof *dpm->dbp);
-
dpm->nwp = 1 + ((dpm->didr >> 28) & 0xf);
- dpm->dwp = calloc(dpm->nwp, sizeof *dpm->dwp);
+ dpm->dbp = calloc(dpm->nbp, sizeof(*dpm->dbp));
+ dpm->dwp = calloc(dpm->nwp, sizeof(*dpm->dwp));
if (!dpm->dbp || !dpm->dwp) {
+ arm_free_reg_cache(arm);
free(dpm->dbp);
free(dpm->dwp);
return ERROR_FAIL;
}
LOG_INFO("%s: hardware has %d breakpoints, %d watchpoints",
- target_name(target), dpm->nbp, dpm->nwp);
+ target_name(target), dpm->nbp, dpm->nwp);
/* REVISIT ... and some of those breakpoints could match
* execution context IDs...