9413a7a814
Some targets (Cortex M) require more complicated calculations for turning the stored stack pointer back into a process stack pointer. For example, the Cortex M stores a bit in the auto-stacked xPSR indicating that alignment had to be performed and an additional 4 byte padding is present before the exception stacking. This change only sets up the framework for Cortex-M unstacking and does not add Cortex-M support. Note: this also fixes the alignment calculation nearly addressed by change #2301 entitled rtos/rtos.c: fix stack alignment calculation. Updated calculation is in rtos_generic_stack_align. Change-Id: I0f662cad0df81cbe5866219ad0fef980dcb3e44f Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com> Cc: Paul Fertser <fercerpav@gmail.com> Cc: Andreas Fritiofson <andreas.fritiofson@gmail.com> Cc: Evan Hunter <evanhunter920@gmail.com> Cc: Jon Burgess <jburgess777@gmail.com> Reviewed-on: http://openocd.zylin.com/3002 Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com> Tested-by: jenkins
54 lines
2.3 KiB
C
54 lines
2.3 KiB
C
/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "rtos.h"
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#include "rtos_standard_stackings.h"
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#include "target/armv7m.h"
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static const struct stack_register_offset rtos_eCos_Cortex_M3_stack_offsets[ARMV7M_NUM_CORE_REGS] = {
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{ 0x0c, 32 }, /* r0 */
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{ 0x10, 32 }, /* r1 */
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{ 0x14, 32 }, /* r2 */
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{ 0x18, 32 }, /* r3 */
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{ 0x1c, 32 }, /* r4 */
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{ 0x20, 32 }, /* r5 */
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{ 0x24, 32 }, /* r6 */
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{ 0x28, 32 }, /* r7 */
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{ 0x2c, 32 }, /* r8 */
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{ 0x30, 32 }, /* r9 */
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{ 0x34, 32 }, /* r10 */
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{ 0x38, 32 }, /* r11 */
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{ 0x3c, 32 }, /* r12 */
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{ -2, 32 }, /* sp */
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{ -1, 32 }, /* lr */
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{ 0x40, 32 }, /* pc */
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{ -1, 32 }, /* xPSR */
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};
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const struct rtos_register_stacking rtos_eCos_Cortex_M3_stacking = {
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0x44, /* stack_registers_size */
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-1, /* stack_growth_direction */
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ARMV7M_NUM_CORE_REGS, /* num_output_registers */
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rtos_generic_stack_align8, /* stack_alignment */
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rtos_eCos_Cortex_M3_stack_offsets /* register_offsets */
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};
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