-/***************************************************************************
- * *
- * 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., *
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
- ***************************************************************************/
+// SPDX-License-Identifier: GPL-2.0-or-later
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "rtos.h"
+#include "rtos_standard_stackings.h"
+#include "target/armv7m.h"
-static const struct stack_register_offset rtos_eCos_Cortex_M3_stack_offsets[] = {
- { 0x0c, 32 }, /* r0 */
- { 0x10, 32 }, /* r1 */
- { 0x14, 32 }, /* r2 */
- { 0x18, 32 }, /* r3 */
- { 0x1c, 32 }, /* r4 */
- { 0x20, 32 }, /* r5 */
- { 0x24, 32 }, /* r6 */
- { 0x28, 32 }, /* r7 */
- { 0x2c, 32 }, /* r8 */
- { 0x30, 32 }, /* r9 */
- { 0x34, 32 }, /* r10 */
- { 0x38, 32 }, /* r11 */
- { 0x3c, 32 }, /* r12 */
- { -2, 32 }, /* sp */
- { -1, 32 }, /* lr */
- { 0x40, 32 }, /* pc */
- { -1, 96 }, /* FPA1 */
- { -1, 96 }, /* FPA2 */
- { -1, 96 }, /* FPA3 */
- { -1, 96 }, /* FPA4 */
- { -1, 96 }, /* FPA5 */
- { -1, 96 }, /* FPA6 */
- { -1, 96 }, /* FPA7 */
- { -1, 96 }, /* FPA8 */
- { -1, 32 }, /* FPS */
- { -1, 32 }, /* xPSR */
+/* For Cortex-M eCos applications the actual thread context register layout can
+ * be different between active threads of an application depending on whether
+ * the FPU is in use, configured for lazy FPU context saving, etc. */
+
+/* Default fixed thread register context description used for older eCos
+ * application builds without the necessary symbolic information describing the
+ * actual configuration-dependent offsets. */
+static const struct stack_register_offset rtos_ecos_cortex_m3_stack_offsets[ARMV7M_NUM_CORE_REGS] = {
+ { ARMV7M_R0, 0x0c, 32 }, /* r0 */
+ { ARMV7M_R1, 0x10, 32 }, /* r1 */
+ { ARMV7M_R2, 0x14, 32 }, /* r2 */
+ { ARMV7M_R3, 0x18, 32 }, /* r3 */
+ { ARMV7M_R4, 0x1c, 32 }, /* r4 */
+ { ARMV7M_R5, 0x20, 32 }, /* r5 */
+ { ARMV7M_R6, 0x24, 32 }, /* r6 */
+ { ARMV7M_R7, 0x28, 32 }, /* r7 */
+ { ARMV7M_R8, 0x2c, 32 }, /* r8 */
+ { ARMV7M_R9, 0x30, 32 }, /* r9 */
+ { ARMV7M_R10, 0x34, 32 }, /* r10 */
+ { ARMV7M_R11, 0x38, 32 }, /* r11 */
+ { ARMV7M_R12, 0x3c, 32 }, /* r12 */
+ { ARMV7M_R13, -2, 32 }, /* sp */
+ { ARMV7M_R14, -1, 32 }, /* lr */
+ { ARMV7M_PC, 0x40, 32 }, /* pc */
+ { ARMV7M_XPSR, -1, 32 }, /* xPSR */
};
-const struct rtos_register_stacking rtos_eCos_Cortex_M3_stacking = {
- 0x44, /* stack_registers_size */
- -1, /* stack_growth_direction */
- 26, /* num_output_registers */
- 8, /* stack_alignment */
- rtos_eCos_Cortex_M3_stack_offsets /* register_offsets */
+const struct rtos_register_stacking rtos_ecos_cortex_m3_stacking = {
+ .stack_registers_size = 0x44,
+ .stack_growth_direction = -1,
+ .num_output_registers = ARMV7M_NUM_CORE_REGS,
+ .calculate_process_stack = rtos_generic_stack_align8,
+ .register_offsets = rtos_ecos_cortex_m3_stack_offsets
};