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4f8d4a38 DD |
1 | /* err.c --- handle errors for RX simulator. |
2 | ||
3666a048 | 3 | Copyright (C) 2008-2021 Free Software Foundation, Inc. |
4f8d4a38 DD |
4 | Contributed by Red Hat, Inc. |
5 | ||
6 | This file is part of the GNU simulators. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
6df01ab8 MF |
21 | /* This must come before any other includes. */ |
22 | #include "defs.h" | |
23 | ||
4f8d4a38 DD |
24 | #include <stdio.h> |
25 | #include <stdlib.h> | |
26 | ||
27 | #include "err.h" | |
28 | ||
29 | static unsigned char ee_actions[SIM_ERR_NUM_ERRORS]; | |
30 | ||
31 | static enum execution_error last_error; | |
32 | ||
33 | static void | |
1c3e93a4 | 34 | ee_overrides (void) |
4f8d4a38 DD |
35 | { |
36 | /* GCC may initialize a bitfield by reading the uninitialized byte, | |
37 | masking in the bitfield, and writing the byte back out. */ | |
38 | ee_actions[SIM_ERR_READ_UNWRITTEN_BYTES] = SIM_ERRACTION_IGNORE; | |
39 | /* This breaks stack unwinding for exceptions because it leaves | |
40 | MC_PUSHED_PC tags in the unwound stack frames. */ | |
41 | ee_actions[SIM_ERR_CORRUPT_STACK] = SIM_ERRACTION_IGNORE; | |
42 | } | |
43 | ||
44 | void | |
45 | execution_error_init_standalone (void) | |
46 | { | |
47 | int i; | |
48 | ||
49 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
50 | ee_actions[i] = SIM_ERRACTION_EXIT; | |
51 | ||
52 | ee_overrides (); | |
53 | } | |
54 | ||
55 | void | |
56 | execution_error_init_debugger (void) | |
57 | { | |
58 | int i; | |
59 | ||
60 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
61 | ee_actions[i] = SIM_ERRACTION_DEBUG; | |
62 | ||
63 | ee_overrides (); | |
64 | } | |
65 | ||
4f8d4a38 DD |
66 | void |
67 | execution_error_warn_all (void) | |
68 | { | |
69 | int i; | |
70 | ||
71 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
72 | ee_actions[i] = SIM_ERRACTION_WARN; | |
73 | } | |
74 | ||
75 | void | |
76 | execution_error_ignore_all (void) | |
77 | { | |
78 | int i; | |
79 | ||
80 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
81 | ee_actions[i] = SIM_ERRACTION_IGNORE; | |
82 | } | |
83 | ||
84 | void | |
85 | execution_error (enum execution_error num, unsigned long address) | |
86 | { | |
87 | if (ee_actions[num] != SIM_ERRACTION_IGNORE) | |
88 | last_error = num; | |
89 | ||
90 | if (ee_actions[num] == SIM_ERRACTION_EXIT | |
91 | || ee_actions[num] == SIM_ERRACTION_WARN) | |
92 | { | |
93 | switch (num) | |
94 | { | |
95 | case SIM_ERR_READ_UNWRITTEN_PAGES: | |
96 | case SIM_ERR_READ_UNWRITTEN_BYTES: | |
97 | printf("Read from unwritten memory at 0x%lx\n", address); | |
98 | break; | |
99 | ||
100 | case SIM_ERR_NULL_POINTER_DEREFERENCE: | |
101 | printf ("NULL pointer dereference\n"); | |
102 | break; | |
103 | ||
104 | case SIM_ERR_CORRUPT_STACK: | |
105 | printf ("Stack corruption detected at 0x%lx\n", address); | |
106 | break; | |
107 | ||
108 | default: | |
109 | printf ("Unknown execution error %d\n", num); | |
110 | exit (1); | |
111 | } | |
112 | } | |
113 | ||
114 | if (ee_actions[num] == SIM_ERRACTION_EXIT) | |
115 | exit (1); | |
116 | } | |
117 | ||
118 | enum execution_error | |
119 | execution_error_get_last_error (void) | |
120 | { | |
121 | return last_error; | |
122 | } | |
123 | ||
124 | void | |
125 | execution_error_clear_last_error (void) | |
126 | { | |
127 | last_error = SIM_ERR_NONE; | |
128 | } | |
129 | ||
130 | void | |
131 | execution_error_set_action (enum execution_error num, enum execution_error_action act) | |
132 | { | |
133 | ee_actions[num] = act; | |
134 | } |