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ARM: Partial implementation of TLS

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Gregory Nutt 2016-03-10 19:29:21 -06:00
parent 5445a1af83
commit 78e4ca2bc7
4 changed files with 115 additions and 24 deletions
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21
arch/arm/src/common/up_checkstack.c
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@ -1,7 +1,7 @@
/****************************************************************************
* arch/arm/src/common/up_checkstack.c
*
* Copyright (C) 2011, 2013, 2015 Gregory Nutt. All rights reserved.
* Copyright (C) 2011, 2013, 2015-2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@ -42,9 +42,11 @@
#include <sys/types.h>
#include <stdint.h>
#include <sched.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/tls.h>
#include <nuttx/board.h>
#include "sched/sched.h"
@ -82,11 +84,20 @@ static size_t do_stackcheck(uintptr_t alloc, size_t size)
FAR uint32_t *ptr;
size_t mark;
/* Get aligned addresses and adjusted sizes */
/* Get aligned addresses of the top and bottom of the stack */
#ifdef CONFIG_TLS
/* Skip over the TLS data structure at the bottom of the stack */
start = alloc & ~3;
end = (alloc + size + 3) & ~3;
size = end - start;
DEBUGASSERT((alloc & TLS_STACK_MASK) == 0);
start = alloc + sizeof(struct tls_info_s);
#else
start = alloc & ~3;
#endif
end = (alloc + size + 3) & ~3;
/* Get the adjusted size based on the top and bottom of the stack */
size = end - start;
/* The ARM uses a push-down stack: the stack grows toward lower addresses
* in memory. We need to start at the lowest address in the stack memory