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arch: arm: add initial support for CONFIG_USERSPACE

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add related configs & (stub) functions for enabling
CONFIG_USERSPACE on arm w/o build errors.

Signed-off-by: Chunlin Han <chunlin.han@linaro.org>
This commit is contained in:
Chunlin Han 2017-09-26 20:59:35 +08:00 • committed by Andrew Boie
commit 95d28e53bb
4 changed files with 111 additions and 0 deletions
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54
include/arch/arm/arch.h
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@ -200,6 +200,60 @@ extern "C" {
#define _ARCH_THREAD_STACK_BUFFER(sym) \
((char *)(sym) + MPU_GUARD_ALIGN_AND_SIZE)
#ifdef CONFIG_ARM_USERSPACE
#ifndef _ASMLANGUAGE
/* Syscall invocation macros. arm-specific machine constraints used to ensure
* args land in the proper registers. Currently, they are all stub functions
* just for enabling CONFIG_USERSPACE on arm w/o errors.
*/
static inline u32_t _arch_syscall_invoke6(u32_t arg1, u32_t arg2, u32_t arg3,
u32_t arg4, u32_t arg5, u32_t arg6,
u32_t call_id)
{
return 0;
}
static inline u32_t _arch_syscall_invoke5(u32_t arg1, u32_t arg2, u32_t arg3,
u32_t arg4, u32_t arg5, u32_t call_id)
{
return 0;
}
static inline u32_t _arch_syscall_invoke4(u32_t arg1, u32_t arg2, u32_t arg3,
u32_t arg4, u32_t call_id)
{
return 0;
}
static inline u32_t _arch_syscall_invoke3(u32_t arg1, u32_t arg2, u32_t arg3,
u32_t call_id)
{
return 0;
}
static inline u32_t _arch_syscall_invoke2(u32_t arg1, u32_t arg2, u32_t call_id)
{
return 0;
}
static inline u32_t _arch_syscall_invoke1(u32_t arg1, u32_t call_id)
{
return 0;
}
static inline u32_t _arch_syscall_invoke0(u32_t call_id)
{
return 0;
}
static inline int _arch_is_user_context(void)
{
return 0;
}
#endif /* _ASMLANGUAGE */
#endif /* CONFIG_ARM_USERSPACE */
#ifdef __cplusplus
}
#endif