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1 | /** @file\r | |
2 | UEFI Debug Lib that sends messages to the Standard Error Device in the EFI System Table.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include <Uefi.h>\r | |
10 | \r | |
11 | #include <Library/DebugLib.h>\r | |
12 | #include <Library/PrintLib.h>\r | |
13 | #include <Library/PcdLib.h>\r | |
14 | #include <Library/BaseLib.h>\r | |
15 | #include <Library/BaseMemoryLib.h>\r | |
16 | #include <Library/DebugPrintErrorLevelLib.h>\r | |
17 | \r | |
18 | //\r | |
19 | // Define the maximum debug and assert message length that this library supports\r | |
20 | //\r | |
21 | #define MAX_DEBUG_MESSAGE_LENGTH 0x100\r | |
22 | \r | |
23 | //\r | |
24 | // VA_LIST can not initialize to NULL for all compiler, so we use this to\r | |
25 | // indicate a null VA_LIST\r | |
26 | //\r | |
27 | VA_LIST mVaListNull;\r | |
28 | \r | |
29 | extern BOOLEAN mPostEBS;\r | |
30 | extern EFI_SYSTEM_TABLE *mDebugST;\r | |
31 | \r | |
32 | /**\r | |
33 | Prints a debug message to the debug output device if the specified error level is enabled.\r | |
34 | \r | |
35 | If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r | |
36 | GetDebugPrintErrorLevel (), then print the message specified by Format and the\r | |
37 | associated variable argument list to the debug output device.\r | |
38 | \r | |
39 | If Format is NULL, then ASSERT().\r | |
40 | \r | |
41 | @param ErrorLevel The error level of the debug message.\r | |
42 | @param Format The format string for the debug message to print.\r | |
43 | @param ... The variable argument list whose contents are accessed\r | |
44 | based on the format string specified by Format.\r | |
45 | \r | |
46 | **/\r | |
47 | VOID\r | |
48 | EFIAPI\r | |
49 | DebugPrint (\r | |
50 | IN UINTN ErrorLevel,\r | |
51 | IN CONST CHAR8 *Format,\r | |
52 | ...\r | |
53 | )\r | |
54 | {\r | |
55 | VA_LIST Marker;\r | |
56 | \r | |
57 | VA_START (Marker, Format);\r | |
58 | DebugVPrint (ErrorLevel, Format, Marker);\r | |
59 | VA_END (Marker);\r | |
60 | }\r | |
61 | \r | |
62 | /**\r | |
63 | Prints a debug message to the debug output device if the specified\r | |
64 | error level is enabled base on Null-terminated format string and a\r | |
65 | VA_LIST argument list or a BASE_LIST argument list.\r | |
66 | \r | |
67 | If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r | |
68 | GetDebugPrintErrorLevel (), then print the message specified by Format and\r | |
69 | the associated variable argument list to the debug output device.\r | |
70 | \r | |
71 | If Format is NULL, then ASSERT().\r | |
72 | \r | |
73 | @param ErrorLevel The error level of the debug message.\r | |
74 | @param Format Format string for the debug message to print.\r | |
75 | @param VaListMarker VA_LIST marker for the variable argument list.\r | |
76 | @param BaseListMarker BASE_LIST marker for the variable argument list.\r | |
77 | \r | |
78 | **/\r | |
79 | VOID\r | |
80 | DebugPrintMarker (\r | |
81 | IN UINTN ErrorLevel,\r | |
82 | IN CONST CHAR8 *Format,\r | |
83 | IN VA_LIST VaListMarker,\r | |
84 | IN BASE_LIST BaseListMarker\r | |
85 | )\r | |
86 | {\r | |
87 | CHAR16 Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r | |
88 | \r | |
89 | if (!mPostEBS) {\r | |
90 | //\r | |
91 | // If Format is NULL, then ASSERT().\r | |
92 | //\r | |
93 | ASSERT (Format != NULL);\r | |
94 | \r | |
95 | //\r | |
96 | // Check driver debug mask value and global mask\r | |
97 | //\r | |
98 | if ((ErrorLevel & GetDebugPrintErrorLevel ()) == 0) {\r | |
99 | return;\r | |
100 | }\r | |
101 | \r | |
102 | //\r | |
103 | // Convert the DEBUG() message to a Unicode String\r | |
104 | //\r | |
105 | if (BaseListMarker == NULL) {\r | |
106 | UnicodeVSPrintAsciiFormat (Buffer, sizeof (Buffer), Format, VaListMarker);\r | |
107 | } else {\r | |
108 | UnicodeBSPrintAsciiFormat (Buffer, sizeof (Buffer), Format, BaseListMarker);\r | |
109 | }\r | |
110 | \r | |
111 | //\r | |
112 | // Send the print string to the Standard Error device\r | |
113 | //\r | |
114 | if ((mDebugST != NULL) && (mDebugST->StdErr != NULL)) {\r | |
115 | mDebugST->StdErr->OutputString (mDebugST->StdErr, Buffer);\r | |
116 | }\r | |
117 | }\r | |
118 | }\r | |
119 | \r | |
120 | /**\r | |
121 | Prints a debug message to the debug output device if the specified\r | |
122 | error level is enabled.\r | |
123 | \r | |
124 | If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r | |
125 | GetDebugPrintErrorLevel (), then print the message specified by Format and\r | |
126 | the associated variable argument list to the debug output device.\r | |
127 | \r | |
128 | If Format is NULL, then ASSERT().\r | |
129 | \r | |
130 | @param ErrorLevel The error level of the debug message.\r | |
131 | @param Format Format string for the debug message to print.\r | |
132 | @param VaListMarker VA_LIST marker for the variable argument list.\r | |
133 | \r | |
134 | **/\r | |
135 | VOID\r | |
136 | EFIAPI\r | |
137 | DebugVPrint (\r | |
138 | IN UINTN ErrorLevel,\r | |
139 | IN CONST CHAR8 *Format,\r | |
140 | IN VA_LIST VaListMarker\r | |
141 | )\r | |
142 | {\r | |
143 | DebugPrintMarker (ErrorLevel, Format, VaListMarker, NULL);\r | |
144 | }\r | |
145 | \r | |
146 | /**\r | |
147 | Prints a debug message to the debug output device if the specified\r | |
148 | error level is enabled.\r | |
149 | This function use BASE_LIST which would provide a more compatible\r | |
150 | service than VA_LIST.\r | |
151 | \r | |
152 | If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function\r | |
153 | GetDebugPrintErrorLevel (), then print the message specified by Format and\r | |
154 | the associated variable argument list to the debug output device.\r | |
155 | \r | |
156 | If Format is NULL, then ASSERT().\r | |
157 | \r | |
158 | @param ErrorLevel The error level of the debug message.\r | |
159 | @param Format Format string for the debug message to print.\r | |
160 | @param BaseListMarker BASE_LIST marker for the variable argument list.\r | |
161 | \r | |
162 | **/\r | |
163 | VOID\r | |
164 | EFIAPI\r | |
165 | DebugBPrint (\r | |
166 | IN UINTN ErrorLevel,\r | |
167 | IN CONST CHAR8 *Format,\r | |
168 | IN BASE_LIST BaseListMarker\r | |
169 | )\r | |
170 | {\r | |
171 | DebugPrintMarker (ErrorLevel, Format, mVaListNull, BaseListMarker);\r | |
172 | }\r | |
173 | \r | |
174 | /**\r | |
175 | Prints an assert message containing a filename, line number, and description.\r | |
176 | This may be followed by a breakpoint or a dead loop.\r | |
177 | \r | |
178 | Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"\r | |
179 | to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of\r | |
180 | PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if\r | |
181 | DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then\r | |
182 | CpuDeadLoop() is called. If neither of these bits are set, then this function\r | |
183 | returns immediately after the message is printed to the debug output device.\r | |
184 | DebugAssert() must actively prevent recursion. If DebugAssert() is called while\r | |
185 | processing another DebugAssert(), then DebugAssert() must return immediately.\r | |
186 | \r | |
187 | If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.\r | |
188 | If Description is NULL, then a <Description> string of "(NULL) Description" is printed.\r | |
189 | \r | |
190 | @param FileName The pointer to the name of the source file that generated\r | |
191 | the assert condition.\r | |
192 | @param LineNumber The line number in the source file that generated the\r | |
193 | assert condition\r | |
194 | @param Description The pointer to the description of the assert condition.\r | |
195 | \r | |
196 | **/\r | |
197 | VOID\r | |
198 | EFIAPI\r | |
199 | DebugAssert (\r | |
200 | IN CONST CHAR8 *FileName,\r | |
201 | IN UINTN LineNumber,\r | |
202 | IN CONST CHAR8 *Description\r | |
203 | )\r | |
204 | {\r | |
205 | CHAR16 Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r | |
206 | \r | |
207 | if (!mPostEBS) {\r | |
208 | //\r | |
209 | // Generate the ASSERT() message in Unicode format\r | |
210 | //\r | |
211 | UnicodeSPrintAsciiFormat (\r | |
212 | Buffer,\r | |
213 | sizeof (Buffer),\r | |
214 | "ASSERT [%a] %a(%d): %a\n",\r | |
215 | gEfiCallerBaseName,\r | |
216 | FileName,\r | |
217 | LineNumber,\r | |
218 | Description\r | |
219 | );\r | |
220 | \r | |
221 | //\r | |
222 | // Send the print string to the Standard Error device\r | |
223 | //\r | |
224 | if ((mDebugST != NULL) && (mDebugST->StdErr != NULL)) {\r | |
225 | mDebugST->StdErr->OutputString (mDebugST->StdErr, Buffer);\r | |
226 | }\r | |
227 | \r | |
228 | //\r | |
229 | // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings\r | |
230 | //\r | |
231 | if ((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) {\r | |
232 | CpuBreakpoint ();\r | |
233 | } else if ((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) {\r | |
234 | CpuDeadLoop ();\r | |
235 | }\r | |
236 | }\r | |
237 | }\r | |
238 | \r | |
239 | /**\r | |
240 | Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.\r | |
241 | \r | |
242 | This function fills Length bytes of Buffer with the value specified by\r | |
243 | PcdDebugClearMemoryValue, and returns Buffer.\r | |
244 | \r | |
245 | If Buffer is NULL, then ASSERT().\r | |
246 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r | |
247 | \r | |
248 | @param Buffer The pointer to the target buffer to be filled with PcdDebugClearMemoryValue.\r | |
249 | @param Length The number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.\r | |
250 | \r | |
251 | @return Buffer The pointer to the target buffer filled with PcdDebugClearMemoryValue.\r | |
252 | \r | |
253 | **/\r | |
254 | VOID *\r | |
255 | EFIAPI\r | |
256 | DebugClearMemory (\r | |
257 | OUT VOID *Buffer,\r | |
258 | IN UINTN Length\r | |
259 | )\r | |
260 | {\r | |
261 | //\r | |
262 | // If Buffer is NULL, then ASSERT().\r | |
263 | //\r | |
264 | ASSERT (Buffer != NULL);\r | |
265 | \r | |
266 | //\r | |
267 | // SetMem() checks for the the ASSERT() condition on Length and returns Buffer\r | |
268 | //\r | |
269 | return SetMem (Buffer, Length, PcdGet8 (PcdDebugClearMemoryValue));\r | |
270 | }\r | |
271 | \r | |
272 | /**\r | |
273 | Returns TRUE if ASSERT() macros are enabled.\r | |
274 | \r | |
275 | This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of\r | |
276 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
277 | \r | |
278 | @retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.\r | |
279 | @retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.\r | |
280 | \r | |
281 | **/\r | |
282 | BOOLEAN\r | |
283 | EFIAPI\r | |
284 | DebugAssertEnabled (\r | |
285 | VOID\r | |
286 | )\r | |
287 | {\r | |
288 | return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED) != 0);\r | |
289 | }\r | |
290 | \r | |
291 | /**\r | |
292 | Returns TRUE if DEBUG() macros are enabled.\r | |
293 | \r | |
294 | This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of\r | |
295 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
296 | \r | |
297 | @retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.\r | |
298 | @retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.\r | |
299 | \r | |
300 | **/\r | |
301 | BOOLEAN\r | |
302 | EFIAPI\r | |
303 | DebugPrintEnabled (\r | |
304 | VOID\r | |
305 | )\r | |
306 | {\r | |
307 | return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED) != 0);\r | |
308 | }\r | |
309 | \r | |
310 | /**\r | |
311 | Returns TRUE if DEBUG_CODE() macros are enabled.\r | |
312 | \r | |
313 | This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of\r | |
314 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
315 | \r | |
316 | @retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.\r | |
317 | @retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.\r | |
318 | \r | |
319 | **/\r | |
320 | BOOLEAN\r | |
321 | EFIAPI\r | |
322 | DebugCodeEnabled (\r | |
323 | VOID\r | |
324 | )\r | |
325 | {\r | |
326 | return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED) != 0);\r | |
327 | }\r | |
328 | \r | |
329 | /**\r | |
330 | Returns TRUE if DEBUG_CLEAR_MEMORY() macro is enabled.\r | |
331 | \r | |
332 | This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of\r | |
333 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
334 | \r | |
335 | @retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.\r | |
336 | @retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.\r | |
337 | \r | |
338 | **/\r | |
339 | BOOLEAN\r | |
340 | EFIAPI\r | |
341 | DebugClearMemoryEnabled (\r | |
342 | VOID\r | |
343 | )\r | |
344 | {\r | |
345 | return (BOOLEAN)((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0);\r | |
346 | }\r | |
347 | \r | |
348 | /**\r | |
349 | Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.\r | |
350 | \r | |
351 | This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.\r | |
352 | \r | |
353 | @retval TRUE Current ErrorLevel is supported.\r | |
354 | @retval FALSE Current ErrorLevel is not supported.\r | |
355 | \r | |
356 | **/\r | |
357 | BOOLEAN\r | |
358 | EFIAPI\r | |
359 | DebugPrintLevelEnabled (\r | |
360 | IN CONST UINTN ErrorLevel\r | |
361 | )\r | |
362 | {\r | |
363 | return (BOOLEAN)((ErrorLevel & PcdGet32 (PcdFixedDebugPrintErrorLevel)) != 0);\r | |
364 | }\r |