1 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
---|---|
2 | /****************************************************************************** |
3 | * |
4 | * Module Name: dbhistry - debugger HISTORY command |
5 | * |
6 | * Copyright (C) 2000 - 2023, Intel Corp. |
7 | * |
8 | *****************************************************************************/ |
9 | |
10 | #include <acpi/acpi.h> |
11 | #include "accommon.h" |
12 | #include "acdebug.h" |
13 | |
14 | #define _COMPONENT ACPI_CA_DEBUGGER |
15 | ACPI_MODULE_NAME("dbhistry") |
16 | |
17 | #define HI_NO_HISTORY 0 |
18 | #define HI_RECORD_HISTORY 1 |
19 | #define HISTORY_SIZE 40 |
20 | typedef struct history_info { |
21 | char *command; |
22 | u32 cmd_num; |
23 | |
24 | } HISTORY_INFO; |
25 | |
26 | static HISTORY_INFO acpi_gbl_history_buffer[HISTORY_SIZE]; |
27 | static u16 acpi_gbl_lo_history = 0; |
28 | static u16 acpi_gbl_num_history = 0; |
29 | static u16 acpi_gbl_next_history_index = 0; |
30 | |
31 | /******************************************************************************* |
32 | * |
33 | * FUNCTION: acpi_db_add_to_history |
34 | * |
35 | * PARAMETERS: command_line - Command to add |
36 | * |
37 | * RETURN: None |
38 | * |
39 | * DESCRIPTION: Add a command line to the history buffer. |
40 | * |
41 | ******************************************************************************/ |
42 | |
43 | void acpi_db_add_to_history(char *command_line) |
44 | { |
45 | u16 cmd_len; |
46 | u16 buffer_len; |
47 | |
48 | /* Put command into the next available slot */ |
49 | |
50 | cmd_len = (u16)strlen(command_line); |
51 | if (!cmd_len) { |
52 | return; |
53 | } |
54 | |
55 | if (acpi_gbl_history_buffer[acpi_gbl_next_history_index].command != |
56 | NULL) { |
57 | buffer_len = |
58 | (u16) |
59 | strlen(acpi_gbl_history_buffer[acpi_gbl_next_history_index]. |
60 | command); |
61 | |
62 | if (cmd_len > buffer_len) { |
63 | acpi_os_free(memory: acpi_gbl_history_buffer |
64 | [acpi_gbl_next_history_index].command); |
65 | acpi_gbl_history_buffer[acpi_gbl_next_history_index]. |
66 | command = acpi_os_allocate(size: cmd_len + 1); |
67 | } |
68 | } else { |
69 | acpi_gbl_history_buffer[acpi_gbl_next_history_index].command = |
70 | acpi_os_allocate(size: cmd_len + 1); |
71 | } |
72 | |
73 | strcpy(p: acpi_gbl_history_buffer[acpi_gbl_next_history_index].command, |
74 | q: command_line); |
75 | |
76 | acpi_gbl_history_buffer[acpi_gbl_next_history_index].cmd_num = |
77 | acpi_gbl_next_cmd_num; |
78 | |
79 | /* Adjust indexes */ |
80 | |
81 | if ((acpi_gbl_num_history == HISTORY_SIZE) && |
82 | (acpi_gbl_next_history_index == acpi_gbl_lo_history)) { |
83 | acpi_gbl_lo_history++; |
84 | if (acpi_gbl_lo_history >= HISTORY_SIZE) { |
85 | acpi_gbl_lo_history = 0; |
86 | } |
87 | } |
88 | |
89 | acpi_gbl_next_history_index++; |
90 | if (acpi_gbl_next_history_index >= HISTORY_SIZE) { |
91 | acpi_gbl_next_history_index = 0; |
92 | } |
93 | |
94 | acpi_gbl_next_cmd_num++; |
95 | if (acpi_gbl_num_history < HISTORY_SIZE) { |
96 | acpi_gbl_num_history++; |
97 | } |
98 | } |
99 | |
100 | /******************************************************************************* |
101 | * |
102 | * FUNCTION: acpi_db_display_history |
103 | * |
104 | * PARAMETERS: None |
105 | * |
106 | * RETURN: None |
107 | * |
108 | * DESCRIPTION: Display the contents of the history buffer |
109 | * |
110 | ******************************************************************************/ |
111 | |
112 | void acpi_db_display_history(void) |
113 | { |
114 | u32 i; |
115 | u16 history_index; |
116 | |
117 | history_index = acpi_gbl_lo_history; |
118 | |
119 | /* Dump entire history buffer */ |
120 | |
121 | for (i = 0; i < acpi_gbl_num_history; i++) { |
122 | if (acpi_gbl_history_buffer[history_index].command) { |
123 | acpi_os_printf(format: "%3u %s\n", |
124 | acpi_gbl_history_buffer[history_index]. |
125 | cmd_num, |
126 | acpi_gbl_history_buffer[history_index]. |
127 | command); |
128 | } |
129 | |
130 | history_index++; |
131 | if (history_index >= HISTORY_SIZE) { |
132 | history_index = 0; |
133 | } |
134 | } |
135 | } |
136 | |
137 | /******************************************************************************* |
138 | * |
139 | * FUNCTION: acpi_db_get_from_history |
140 | * |
141 | * PARAMETERS: command_num_arg - String containing the number of the |
142 | * command to be retrieved |
143 | * |
144 | * RETURN: Pointer to the retrieved command. Null on error. |
145 | * |
146 | * DESCRIPTION: Get a command from the history buffer |
147 | * |
148 | ******************************************************************************/ |
149 | |
150 | char *acpi_db_get_from_history(char *command_num_arg) |
151 | { |
152 | u32 cmd_num; |
153 | |
154 | if (command_num_arg == NULL) { |
155 | cmd_num = acpi_gbl_next_cmd_num - 1; |
156 | } |
157 | |
158 | else { |
159 | cmd_num = strtoul(command_num_arg, NULL, 0); |
160 | } |
161 | |
162 | return (acpi_db_get_history_by_index(commandd_num: cmd_num)); |
163 | } |
164 | |
165 | /******************************************************************************* |
166 | * |
167 | * FUNCTION: acpi_db_get_history_by_index |
168 | * |
169 | * PARAMETERS: cmd_num - Index of the desired history entry. |
170 | * Values are 0...(acpi_gbl_next_cmd_num - 1) |
171 | * |
172 | * RETURN: Pointer to the retrieved command. Null on error. |
173 | * |
174 | * DESCRIPTION: Get a command from the history buffer |
175 | * |
176 | ******************************************************************************/ |
177 | |
178 | char *acpi_db_get_history_by_index(u32 cmd_num) |
179 | { |
180 | u32 i; |
181 | u16 history_index; |
182 | |
183 | /* Search history buffer */ |
184 | |
185 | history_index = acpi_gbl_lo_history; |
186 | for (i = 0; i < acpi_gbl_num_history; i++) { |
187 | if (acpi_gbl_history_buffer[history_index].cmd_num == cmd_num) { |
188 | |
189 | /* Found the command, return it */ |
190 | |
191 | return (acpi_gbl_history_buffer[history_index].command); |
192 | } |
193 | |
194 | /* History buffer is circular */ |
195 | |
196 | history_index++; |
197 | if (history_index >= HISTORY_SIZE) { |
198 | history_index = 0; |
199 | } |
200 | } |
201 | |
202 | acpi_os_printf(format: "Invalid history number: %u\n", history_index); |
203 | return (NULL); |
204 | } |
205 |