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Aiden Park
57bea9118d
This will allow debug log buffer to record logs in ring buffer if the buffer is full. Signed-off-by: Aiden Park <aiden.park@intel.com>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/** @file
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Shell command `dmesg` to print the contents of the log buffer.
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Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/ShellLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Guid/LoaderFspInfoGuid.h>
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#include <Library/ConsoleInLib.h>
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#include <Library/ConsoleOutLib.h>
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#include <Library/BootloaderCommonLib.h>
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#include <Library/DebugLogBufferLib.h>
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/**
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Print the contents of the log buffer
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@param[in] Shell shell instance
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@param[in] Argc number of command line arguments
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@param[in] Argv command line arguments
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@retval EFI_SUCCESS
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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ShellCommandDmesgFunc (
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IN SHELL *Shell,
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IN UINTN Argc,
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IN CHAR16 *Argv[]
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);
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CONST SHELL_COMMAND ShellCommandDmesg = {
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L"dmesg",
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L"Print messages stored in boot log buffer",
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&ShellCommandDmesgFunc
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};
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CONST UINTN LinesPerPage = 30;
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/**
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Print the contents of the log buffer
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@param[in] Shell shell instance
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@param[in] Argc number of command line arguments
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@param[in] Argv command line arguments
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@retval EFI_SUCCESS
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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ShellCommandDmesgFunc (
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IN SHELL *Shell,
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IN UINTN Argc,
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IN CHAR16 *Argv[]
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)
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{
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DEBUG_LOG_BUFFER_HEADER *LogBufHdr;
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UINTN PageLineCount;
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UINTN Index;
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UINT8 Buf[1];
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BOOLEAN Paged = FALSE;
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UINTN Length;
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UINTN BufIndex;
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for (Index = 1; Index < Argc; Index++) {
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if (StrCmp (Argv[Index], L"-h") == 0) {
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goto usage;
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}
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if (StrCmp (Argv[Index], L"-p") == 0) {
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Paged = TRUE;
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}
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}
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PageLineCount = 0;
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LogBufHdr = (DEBUG_LOG_BUFFER_HEADER *) GetDebugLogBufferPtr ();
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if (LogBufHdr == NULL) {
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return EFI_UNSUPPORTED;
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}
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if (LogBufHdr->UsedLength > LogBufHdr->TotalLength) {
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return EFI_LOAD_ERROR;
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}
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if ((LogBufHdr->Attribute & DEBUG_LOG_BUFFER_ATTRIBUTE_FULL) != 0) {
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BufIndex = LogBufHdr->UsedLength - LogBufHdr->HeaderLength;
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Length = LogBufHdr->TotalLength - LogBufHdr->HeaderLength;
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} else {
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BufIndex = 0;
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Length = LogBufHdr->UsedLength - LogBufHdr->HeaderLength;
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}
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for (Index = 0; Index < Length; Index++, BufIndex++) {
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ConsoleWrite ((UINT8 *)&LogBufHdr->Buffer[BufIndex % Length], 1);
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// Page out the log contents if requested
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if (Paged && (LogBufHdr->Buffer[BufIndex % Length] == '\n') && (++PageLineCount == LinesPerPage)) {
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ShellPrint (L"[Press <ESC> to stop, or any other key to continue...]");
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ConsoleRead (Buf, 1);
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if (Buf[0] == '\x1b') { break; }
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PageLineCount = 0;
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ShellPrint (L"\r%54a\r", "");
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}
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}
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return EFI_SUCCESS;
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usage:
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ShellPrint (L"Usage: %s [-p]\n", Argv[0]);
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ShellPrint (L"\n"
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L"Flags:\n"
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L" -p Paged output (display %d lines at a time)\n", LinesPerPage);
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return EFI_ABORTED;
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}
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