Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: dbhistry - debugger HISTORY command * * Copyright (C) 2000 - 2022, Intel Corp. * *****************************************************************************/ #include <acpi/acpi.h> #include "accommon.h" #include "acdebug.h" #define _COMPONENT ACPI_CA_DEBUGGER ACPI_MODULE_NAME("dbhistry") #define HI_NO_HISTORY 0 #define HI_RECORD_HISTORY 1 #define HISTORY_SIZE 40 typedef struct history_info { char *command; u32 cmd_num; } HISTORY_INFO; static HISTORY_INFO acpi_gbl_history_buffer[HISTORY_SIZE]; static u16 acpi_gbl_lo_history = 0; static u16 acpi_gbl_num_history = 0; static u16 acpi_gbl_next_history_index = 0; /******************************************************************************* * * FUNCTION: acpi_db_add_to_history * * PARAMETERS: command_line - Command to add * * RETURN: None * * DESCRIPTION: Add a command line to the history buffer. * ******************************************************************************/ void acpi_db_add_to_history(char *command_line) { u16 cmd_len; u16 buffer_len; /* Put command into the next available slot */ cmd_len = (u16)strlen(command_line); if (!cmd_len) { return; } if (acpi_gbl_history_buffer[acpi_gbl_next_history_index].command != NULL) { buffer_len = (u16) strlen(acpi_gbl_history_buffer[acpi_gbl_next_history_index]. command); if (cmd_len > buffer_len) { acpi_os_free(acpi_gbl_history_buffer [acpi_gbl_next_history_index].command); acpi_gbl_history_buffer[acpi_gbl_next_history_index]. command = acpi_os_allocate(cmd_len + 1); } } else { acpi_gbl_history_buffer[acpi_gbl_next_history_index].command = acpi_os_allocate(cmd_len + 1); } strcpy(acpi_gbl_history_buffer[acpi_gbl_next_history_index].command, command_line); acpi_gbl_history_buffer[acpi_gbl_next_history_index].cmd_num = acpi_gbl_next_cmd_num; /* Adjust indexes */ if ((acpi_gbl_num_history == HISTORY_SIZE) && (acpi_gbl_next_history_index == acpi_gbl_lo_history)) { acpi_gbl_lo_history++; if (acpi_gbl_lo_history >= HISTORY_SIZE) { acpi_gbl_lo_history = 0; } } acpi_gbl_next_history_index++; if (acpi_gbl_next_history_index >= HISTORY_SIZE) { acpi_gbl_next_history_index = 0; } acpi_gbl_next_cmd_num++; if (acpi_gbl_num_history < HISTORY_SIZE) { acpi_gbl_num_history++; } } /******************************************************************************* * * FUNCTION: acpi_db_display_history * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Display the contents of the history buffer * ******************************************************************************/ void acpi_db_display_history(void) { u32 i; u16 history_index; history_index = acpi_gbl_lo_history; /* Dump entire history buffer */ for (i = 0; i < acpi_gbl_num_history; i++) { if (acpi_gbl_history_buffer[history_index].command) { acpi_os_printf("%3u %s\n", acpi_gbl_history_buffer[history_index]. cmd_num, acpi_gbl_history_buffer[history_index]. command); } history_index++; if (history_index >= HISTORY_SIZE) { history_index = 0; } } } /******************************************************************************* * * FUNCTION: acpi_db_get_from_history * * PARAMETERS: command_num_arg - String containing the number of the * command to be retrieved * * RETURN: Pointer to the retrieved command. Null on error. * * DESCRIPTION: Get a command from the history buffer * ******************************************************************************/ char *acpi_db_get_from_history(char *command_num_arg) { u32 cmd_num; if (command_num_arg == NULL) { cmd_num = acpi_gbl_next_cmd_num - 1; } else { cmd_num = strtoul(command_num_arg, NULL, 0); } return (acpi_db_get_history_by_index(cmd_num)); } /******************************************************************************* * * FUNCTION: acpi_db_get_history_by_index * * PARAMETERS: cmd_num - Index of the desired history entry. * Values are 0...(acpi_gbl_next_cmd_num - 1) * * RETURN: Pointer to the retrieved command. Null on error. * * DESCRIPTION: Get a command from the history buffer * ******************************************************************************/ char *acpi_db_get_history_by_index(u32 cmd_num) { u32 i; u16 history_index; /* Search history buffer */ history_index = acpi_gbl_lo_history; for (i = 0; i < acpi_gbl_num_history; i++) { if (acpi_gbl_history_buffer[history_index].cmd_num == cmd_num) { /* Found the command, return it */ return (acpi_gbl_history_buffer[history_index].command); } /* History buffer is circular */ history_index++; if (history_index >= HISTORY_SIZE) { history_index = 0; } } acpi_os_printf("Invalid history number: %u\n", history_index); return (NULL); } |