source: mainline/kernel/arch/abs32le/src/abs32le.c@ 4f663f3e

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 4f663f3e was 5a5269d, checked in by GitHub <noreply@…>, 6 years ago

Change type of uspace pointers in kernel from pointer type to numeric (#170)

From kernel's perspective, userspace addresses are not valid pointers,
and can only be used in calls to copy_to/from_uspace().
Therefore, we change the type of those arguments and variables to
uspace_addr_t which is an alias for sysarg_t.

This allows the compiler to catch accidental direct accesses to
userspace addresses.

Additionally, to avoid losing the type information in code,
a macro uspace_ptr(type) is used that translates to uspace_addr_t.
I makes no functional difference, but allows keeping the type information
in code in case we implement some sort of static checking for it in the future.

However, ccheck doesn't like that, so instead of using uspace_ptr(char),
we use uspace_ptr_char which is defined as
#define uspace_ptr_char uspace_ptr(char).

  • Property mode set to 100644
File size: 3.1 KB
Line 
1/*
2 * Copyright (c) 2010 Martin Decky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup kernel_abs32le
30 * @{
31 */
32/** @file
33 */
34
35#include <arch.h>
36#include <typedefs.h>
37#include <arch/interrupt.h>
38#include <arch/asm.h>
39
40#include <halt.h>
41#include <config.h>
42#include <console/console.h>
43#include <errno.h>
44#include <context.h>
45#include <fpu_context.h>
46#include <interrupt.h>
47#include <ddi/irq.h>
48#include <syscall/copy.h>
49#include <syscall/syscall.h>
50
51static void abs32le_post_mm_init(void);
52
53arch_ops_t abs32le_ops = {
54 .post_mm_init = abs32le_post_mm_init,
55};
56
57arch_ops_t *arch_ops = &abs32le_ops;
58
59char memcpy_from_uspace_failover_address;
60char memcpy_to_uspace_failover_address;
61
62void abs32le_post_mm_init(void)
63{
64 if (config.cpu_active == 1) {
65 /* Initialize IRQ routing */
66 irq_init(0, 0);
67
68 /* Merge all memory zones to 1 big zone */
69 zone_merge_all();
70 }
71}
72
73void calibrate_delay_loop(void)
74{
75}
76
77/** Construct function pointer
78 *
79 * @param fptr function pointer structure
80 * @param addr function address
81 * @param caller calling function address
82 *
83 * @return address of the function pointer
84 *
85 */
86void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
87{
88 return addr;
89}
90
91void arch_reboot(void)
92{
93}
94
95void irq_initialize_arch(irq_t *irq)
96{
97 (void) irq;
98}
99
100void istate_decode(istate_t *istate)
101{
102 (void) istate;
103}
104
105int context_save_arch(context_t *ctx)
106{
107 return EOK;
108}
109
110void context_restore_arch(context_t *ctx)
111{
112 while (true)
113 ;
114}
115
116void fpu_init(void)
117{
118}
119
120void fpu_context_save(fpu_context_t *ctx)
121{
122}
123
124void fpu_context_restore(fpu_context_t *ctx)
125{
126}
127
128uintptr_t memcpy_from_uspace(void *dst, uspace_addr_t uspace_src, size_t size)
129{
130 return 0;
131}
132
133uintptr_t memcpy_to_uspace(uspace_addr_t uspace_dst, const void *src, size_t size)
134{
135 return 0;
136}
137
138void early_putwchar(wchar_t ch)
139{
140}
141
142/** @}
143 */
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