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genode/repos/base/include/spec/arm/cpu/consts.h

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base: Fix stack pointer alignment for ARM After some research we found that the stack pointer on ARM platforms must be at least double word aligned (See: "Procedure Call Standard for the ARM Architecture" - 5.2.1.1). Since a 'call' on ARM will not result in a stack pointer change (like on x86), the current behavior resulted in a 4 Byte aligned stack only. Follow up to #1043
2014-02-20 10:27:26 +00:00
/*
* \brief Constants definitions for the ARM architecture.
* \author Sebastian Sumpf
* \date 2014-02-20
*/
/*
Adjust file headers to refer to the AGPLv3
2017-02-20 12:23:52 +00:00
* Copyright (C) 2011-2017 Genode Labs GmbH
base: Fix stack pointer alignment for ARM After some research we found that the stack pointer on ARM platforms must be at least double word aligned (See: "Procedure Call Standard for the ARM Architecture" - 5.2.1.1). Since a 'call' on ARM will not result in a stack pointer change (like on x86), the current behavior resulted in a 4 Byte aligned stack only. Follow up to #1043
2014-02-20 10:27:26 +00:00
*
* This file is part of the Genode OS framework, which is distributed
Adjust file headers to refer to the AGPLv3
2017-02-20 12:23:52 +00:00
* under the terms of the GNU Affero General Public License version 3.
base: Fix stack pointer alignment for ARM After some research we found that the stack pointer on ARM platforms must be at least double word aligned (See: "Procedure Call Standard for the ARM Architecture" - 5.2.1.1). Since a 'call' on ARM will not result in a stack pointer change (like on x86), the current behavior resulted in a 4 Byte aligned stack only. Follow up to #1043
2014-02-20 10:27:26 +00:00
*/
Introduce 'spec' subdirectories to outline aspects Instead of holding SPEC-variable dependent files and directories inline within the repository structure, move them into 'spec' subdirectories at the corresponding levels, e.g.: repos/base/include/spec repos/base/mk/spec repos/base/lib/mk/spec repos/base/src/core/spec ... Moreover, this commit removes the 'platform' directories. That term was used in an overloaded sense. All SPEC-relative 'platform' directories are now named 'spec'. Other files, like for instance those related to the kernel/architecture specific startup library, where moved from 'platform' directories to explicit, more meaningful places like e.g.: 'src/lib/startup'. Fix #1673
2015-09-03 12:55:05 +00:00
#ifndef _INCLUDE__SPEC__ARM__CPU__CONSTS_H_
#define _INCLUDE__SPEC__ARM__CPU__CONSTS_H_
base: Fix stack pointer alignment for ARM After some research we found that the stack pointer on ARM platforms must be at least double word aligned (See: "Procedure Call Standard for the ARM Architecture" - 5.2.1.1). Since a 'call' on ARM will not result in a stack pointer change (like on x86), the current behavior resulted in a 4 Byte aligned stack only. Follow up to #1043
2014-02-20 10:27:26 +00:00
#include <base/stdint.h>
namespace Abi {
base: ABI specific stack creation ref #1042
2014-02-21 09:59:39 +00:00
noux: consider stack alignment constraints The interim stack in a forked noux process has to consider the architecture dependent stack alignment constraints. Fix #1852
2016-01-15 14:48:20 +00:00
/*
* On ARM we align the stack top to 16-byte. As a call (or branch) will not
* change the stack pointer, we need no further stack adjustment.
base: Fix stack pointer alignment for ARM After some research we found that the stack pointer on ARM platforms must be at least double word aligned (See: "Procedure Call Standard for the ARM Architecture" - 5.2.1.1). Since a 'call' on ARM will not result in a stack pointer change (like on x86), the current behavior resulted in a 4 Byte aligned stack only. Follow up to #1043
2014-02-20 10:27:26 +00:00
*/
Prevent compiler warnings
2016-04-21 07:10:44 +00:00
inline Genode::addr_t stack_align(Genode::addr_t addr) {
noux: consider stack alignment constraints The interim stack in a forked noux process has to consider the architecture dependent stack alignment constraints. Fix #1852
2016-01-15 14:48:20 +00:00
return (addr & ~0xf); }
base: ABI specific stack creation ref #1042
2014-02-21 09:59:39 +00:00
/**
* Do ABI specific initialization to a freshly created stack
*/
inline void init_stack(Genode::addr_t) { }
base: Fix stack pointer alignment for ARM After some research we found that the stack pointer on ARM platforms must be at least double word aligned (See: "Procedure Call Standard for the ARM Architecture" - 5.2.1.1). Since a 'call' on ARM will not result in a stack pointer change (like on x86), the current behavior resulted in a 4 Byte aligned stack only. Follow up to #1043
2014-02-20 10:27:26 +00:00
}
Introduce 'spec' subdirectories to outline aspects Instead of holding SPEC-variable dependent files and directories inline within the repository structure, move them into 'spec' subdirectories at the corresponding levels, e.g.: repos/base/include/spec repos/base/mk/spec repos/base/lib/mk/spec repos/base/src/core/spec ... Moreover, this commit removes the 'platform' directories. That term was used in an overloaded sense. All SPEC-relative 'platform' directories are now named 'spec'. Other files, like for instance those related to the kernel/architecture specific startup library, where moved from 'platform' directories to explicit, more meaningful places like e.g.: 'src/lib/startup'. Fix #1673
2015-09-03 12:55:05 +00:00
#endif /* _INCLUDE__SPEC__ARM__CPU__CONSTS_H_ */
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