mirror of https://github.com/acidanthera/audk.git
554 lines
15 KiB
C
554 lines
15 KiB
C
/** @file
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Serial IO Abstraction for GDB stub. This allows an EFI consoles that shows up on the system
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running GDB. One consle for error information and another console for user input/output.
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Basic packet format is $packet-data#checksum. So every comand has 4 bytes of overhead: $,
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#, 0, 0. The 0 and 0 are the ascii characters for the checksum.
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Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <GdbStubInternal.h>
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//
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// Set TRUE if F Reply package signals a ctrl-c. We can not process the Ctrl-c
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// here we need to wait for the periodic callback to do this.
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//
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BOOLEAN gCtrlCBreakFlag = FALSE;
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//
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// If the periodic callback is called while we are processing an F packet we need
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// to let the callback know to not read from the serail stream as it could steal
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// characters from the F reponse packet
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//
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BOOLEAN gProcessingFPacket = FALSE;
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/**
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Process a control-C break message.
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Currently a place holder, remove the ASSERT when it gets implemented.
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@param ErrNo Error infomration from the F reply packet or other source
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**/
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VOID
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GdbCtrlCBreakMessage (
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IN UINTN ErrNo
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)
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{
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// See D.10.5 of gdb.pdf
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// This should look like a break message. Should look like SIGINT
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/* TODO: Make sure if we should do anything with ErrNo */
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//Turn on the global Ctrl-C flag.
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gCtrlCBreakFlag = TRUE;
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}
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/**
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Parse the F reply packet and extract the return value and an ErrNo if it exists.
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@param Packet Packet to parse like an F reply packet
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@param ErrNo Buffer to hold Count bytes that were read
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@retval -1 Error, not a valid F reply packet
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@retval other Return the return code from the F reply packet
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**/
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INTN
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GdbParseFReplyPacket (
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IN CHAR8 *Packet,
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OUT UINTN *ErrNo
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)
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{
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INTN RetCode;
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if (Packet[0] != 'F') {
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// A valid responce would be an F packet
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return -1;
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}
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RetCode = AsciiStrHexToUintn (&Packet[1]);
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// Find 1st comma
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for (;*Packet != '\0' && *Packet != ','; Packet++);
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if (*Packet == '\0') {
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*ErrNo = 0;
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return RetCode;
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}
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*ErrNo = AsciiStrHexToUintn (++Packet);
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// Find 2nd comma
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for (;*Packet != '\0' && *Packet != ','; Packet++);
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if (*Packet == '\0') {
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return RetCode;
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}
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if (*(++Packet) == 'C') {
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GdbCtrlCBreakMessage (*ErrNo);
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}
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return RetCode;
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}
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/**
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Read data from a FileDescriptor. On success number of bytes read is returned. Zero indicates
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the end of a file. On error -1 is returned. If count is zero, GdbRead returns zero.
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@param FileDescriptor Device to talk to.
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@param Buffer Buffer to hold Count bytes that were read
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@param Count Number of bytes to transfer.
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@retval -1 Error
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@retval {other} Number of bytes read.
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**/
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INTN
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GdbRead (
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IN INTN FileDescriptor,
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OUT VOID *Buffer,
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IN UINTN Count
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)
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{
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CHAR8 Packet[128];
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UINTN Size;
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INTN RetCode;
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UINTN ErrNo;
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BOOLEAN ReceiveDone = FALSE;
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// Send:
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// "Fread,XX,YYYYYYYY,XX
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//
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// XX - FileDescriptor in ASCII
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// YYYYYYYY - Buffer address in ASCII
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// XX - Count in ASCII
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// SS - check sum
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//
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Size = AsciiSPrint (Packet, sizeof (Packet), "Fread,%x,%x,%x", FileDescriptor, Buffer, Count);
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// Packet array is too small if you got this ASSERT
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ASSERT (Size < sizeof (Packet));
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gProcessingFPacket = TRUE;
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SendPacket (Packet);
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Print ((CHAR16 *)L"Packet sent..\n");
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do {
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// Reply:
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ReceivePacket (Packet, sizeof (Packet));
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Print ((CHAR16 *)L"Command received..%c\n", Packet[0]);
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// Process GDB commands
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switch (Packet[0]) {
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//Write memory command.
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//M addr,length:XX...
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case 'M':
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WriteToMemory (Packet);
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break;
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//Fretcode, errno, Ctrl-C flag
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//retcode - Count read
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case 'F':
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//Once target receives F reply packet that means the previous
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//transactions are finished.
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ReceiveDone = TRUE;
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break;
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//Send empty buffer
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default :
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SendNotSupported();
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break;
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}
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} while (ReceiveDone == FALSE);
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RetCode = GdbParseFReplyPacket (Packet, &ErrNo);
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Print ((CHAR16 *)L"RetCode: %x..ErrNo: %x..\n", RetCode, ErrNo);
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if (ErrNo > 0) {
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//Send error to the host if there is any.
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SendError ((UINT8)ErrNo);
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}
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gProcessingFPacket = FALSE;
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return RetCode;
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}
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/**
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Write data to a FileDescriptor. On success number of bytes written is returned. Zero indicates
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nothing was written. On error -1 is returned.
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@param FileDescriptor Device to talk to.
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@param Buffer Buffer to hold Count bytes that are to be written
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@param Count Number of bytes to transfer.
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@retval -1 Error
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@retval {other} Number of bytes written.
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**/
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INTN
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GdbWrite (
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IN INTN FileDescriptor,
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OUT CONST VOID *Buffer,
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IN UINTN Count
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)
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{
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CHAR8 Packet[128];
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UINTN Size;
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INTN RetCode;
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UINTN ErrNo;
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BOOLEAN ReceiveDone = FALSE;
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// Send:
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// #Fwrite,XX,YYYYYYYY,XX$SS
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//
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// XX - FileDescriptor in ASCII
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// YYYYYYYY - Buffer address in ASCII
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// XX - Count in ASCII
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// SS - check sum
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//
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Size = AsciiSPrint (Packet, sizeof (Packet), "Fwrite,%x,%x,%x", FileDescriptor, Buffer, Count);
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// Packet array is too small if you got this ASSERT
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ASSERT (Size < sizeof (Packet));
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SendPacket (Packet);
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Print ((CHAR16 *)L"Packet sent..\n");
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do {
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// Reply:
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ReceivePacket (Packet, sizeof (Packet));
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Print ((CHAR16 *)L"Command received..%c\n", Packet[0]);
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// Process GDB commands
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switch (Packet[0]) {
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//Read memory command.
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//m addr,length.
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case 'm':
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ReadFromMemory (Packet);
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break;
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//Fretcode, errno, Ctrl-C flag
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//retcode - Count read
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case 'F':
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//Once target receives F reply packet that means the previous
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//transactions are finished.
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ReceiveDone = TRUE;
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break;
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//Send empty buffer
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default :
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SendNotSupported();
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break;
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}
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} while (ReceiveDone == FALSE);
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RetCode = GdbParseFReplyPacket (Packet, &ErrNo);
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Print ((CHAR16 *)L"RetCode: %x..ErrNo: %x..\n", RetCode, ErrNo);
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//Send error to the host if there is any.
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if (ErrNo > 0) {
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SendError((UINT8)ErrNo);
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}
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return RetCode;
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}
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/**
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Reset the serial device.
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@param This Protocol instance pointer.
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@retval EFI_SUCCESS The device was reset.
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@retval EFI_DEVICE_ERROR The serial device could not be reset.
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**/
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EFI_STATUS
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EFIAPI
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GdbSerialReset (
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IN EFI_SERIAL_IO_PROTOCOL *This
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)
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{
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return EFI_SUCCESS;
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}
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/**
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Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,
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data buts, and stop bits on a serial device.
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@param This Protocol instance pointer.
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@param BaudRate The requested baud rate. A BaudRate value of 0 will use the the
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device's default interface speed.
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@param ReveiveFifoDepth The requested depth of the FIFO on the receive side of the
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serial interface. A ReceiveFifoDepth value of 0 will use
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the device's dfault FIFO depth.
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@param Timeout The requested time out for a single character in microseconds.
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This timeout applies to both the transmit and receive side of the
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interface. A Timeout value of 0 will use the device's default time
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out value.
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@param Parity The type of parity to use on this serial device. A Parity value of
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DefaultParity will use the device's default parity value.
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@param DataBits The number of data bits to use on the serial device. A DataBits
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vaule of 0 will use the device's default data bit setting.
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@param StopBits The number of stop bits to use on this serial device. A StopBits
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value of DefaultStopBits will use the device's default number of
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stop bits.
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@retval EFI_SUCCESS The device was reset.
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@retval EFI_DEVICE_ERROR The serial device could not be reset.
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**/
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EFI_STATUS
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EFIAPI
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GdbSerialSetAttributes (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN UINT64 BaudRate,
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IN UINT32 ReceiveFifoDepth,
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IN UINT32 Timeout,
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IN EFI_PARITY_TYPE Parity,
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IN UINT8 DataBits,
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IN EFI_STOP_BITS_TYPE StopBits
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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Set the control bits on a serial device
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@param This Protocol instance pointer.
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@param Control Set the bits of Control that are settable.
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@retval EFI_SUCCESS The new control bits were set on the serial device.
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@retval EFI_UNSUPPORTED The serial device does not support this operation.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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GdbSerialSetControl (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN UINT32 Control
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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Retrieves the status of thecontrol bits on a serial device
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@param This Protocol instance pointer.
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@param Control A pointer to return the current Control signals from the serial device.
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@retval EFI_SUCCESS The control bits were read from the serial device.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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GdbSerialGetControl (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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OUT UINT32 *Control
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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Writes data to a serial device.
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@param This Protocol instance pointer.
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@param BufferSize On input, the size of the Buffer. On output, the amount of
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data actually written.
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@param Buffer The buffer of data to write
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@retval EFI_SUCCESS The data was written.
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@retval EFI_DEVICE_ERROR The device reported an error.
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@retval EFI_TIMEOUT The data write was stopped due to a timeout.
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**/
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EFI_STATUS
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EFIAPI
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GdbSerialWrite (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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IN VOID *Buffer
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)
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{
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GDB_SERIAL_DEV *SerialDev;
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UINTN Return;
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SerialDev = GDB_SERIAL_DEV_FROM_THIS (This);
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Return = GdbWrite (SerialDev->OutFileDescriptor, Buffer, *BufferSize);
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if (Return == (UINTN)-1) {
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return EFI_DEVICE_ERROR;
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}
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if (Return != *BufferSize) {
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*BufferSize = Return;
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}
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return EFI_SUCCESS;
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}
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/**
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Writes data to a serial device.
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@param This Protocol instance pointer.
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@param BufferSize On input, the size of the Buffer. On output, the amount of
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data returned in Buffer.
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@param Buffer The buffer to return the data into.
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@retval EFI_SUCCESS The data was read.
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@retval EFI_DEVICE_ERROR The device reported an error.
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@retval EFI_TIMEOUT The data write was stopped due to a timeout.
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**/
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EFI_STATUS
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EFIAPI
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GdbSerialRead (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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GDB_SERIAL_DEV *SerialDev;
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UINTN Return;
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SerialDev = GDB_SERIAL_DEV_FROM_THIS (This);
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Return = GdbRead (SerialDev->InFileDescriptor, Buffer, *BufferSize);
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if (Return == (UINTN)-1) {
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return EFI_DEVICE_ERROR;
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}
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if (Return != *BufferSize) {
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*BufferSize = Return;
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}
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return EFI_SUCCESS;
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}
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//
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// Template used to initailize the GDB Serial IO protocols
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//
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GDB_SERIAL_DEV gdbSerialDevTemplate = {
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GDB_SERIAL_DEV_SIGNATURE,
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NULL,
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{ // SerialIo
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SERIAL_IO_INTERFACE_REVISION,
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GdbSerialReset,
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GdbSerialSetAttributes,
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GdbSerialSetControl,
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GdbSerialGetControl,
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GdbSerialWrite,
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GdbSerialRead,
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NULL
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},
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{ // SerialMode
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0, // ControlMask
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0, // Timeout
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0, // BaudRate
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1, // RceiveFifoDepth
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0, // DataBits
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0, // Parity
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0 // StopBits
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},
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{
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{
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{
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HARDWARE_DEVICE_PATH,
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HW_VENDOR_DP,
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{
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(UINT8) (sizeof (VENDOR_DEVICE_PATH) + sizeof (UINT32)),
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(UINT8) ((sizeof (VENDOR_DEVICE_PATH) + sizeof (UINT32)) >> 8)
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},
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},
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EFI_SERIAL_IO_PROTOCOL_GUID
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},
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0,
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{
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END_DEVICE_PATH_TYPE,
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END_ENTIRE_DEVICE_PATH_SUBTYPE,
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{
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(UINT8) (sizeof (EFI_DEVICE_PATH_PROTOCOL)),
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(UINT8) (sizeof (EFI_DEVICE_PATH_PROTOCOL) >> 8)
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}
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},
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},
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GDB_STDIN,
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GDB_STDOUT
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};
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/**
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Make two serial consoles: 1) StdIn and StdOut via GDB. 2) StdErr via GDB.
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These console show up on the remote system running GDB
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**/
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VOID
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GdbInitializeSerialConsole (
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VOID
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)
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{
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EFI_STATUS Status;
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GDB_SERIAL_DEV *StdOutSerialDev;
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GDB_SERIAL_DEV *StdErrSerialDev;
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// Use the template to make a copy of the Serial Console private data structure.
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StdOutSerialDev = AllocateCopyPool (sizeof (GDB_SERIAL_DEV), &gdbSerialDevTemplate);
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ASSERT (StdOutSerialDev != NULL);
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// Fixup pointer after the copy
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StdOutSerialDev->SerialIo.Mode = &StdOutSerialDev->SerialMode;
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StdErrSerialDev = AllocateCopyPool (sizeof (GDB_SERIAL_DEV), &gdbSerialDevTemplate);
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ASSERT (StdErrSerialDev != NULL);
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// Fixup pointer and modify stuff that is different for StdError
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StdErrSerialDev->SerialIo.Mode = &StdErrSerialDev->SerialMode;
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StdErrSerialDev->DevicePath.Index = 1;
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StdErrSerialDev->OutFileDescriptor = GDB_STDERR;
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// Make a new handle with Serial IO protocol and its device path on it.
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Status = gBS->InstallMultipleProtocolInterfaces (
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&StdOutSerialDev->Handle,
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&gEfiSerialIoProtocolGuid, &StdOutSerialDev->SerialIo,
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&gEfiDevicePathProtocolGuid, &StdOutSerialDev->DevicePath,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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// Make a new handle with Serial IO protocol and its device path on it.
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Status = gBS->InstallMultipleProtocolInterfaces (
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&StdErrSerialDev->Handle,
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&gEfiSerialIoProtocolGuid, &StdErrSerialDev->SerialIo,
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&gEfiDevicePathProtocolGuid, &StdErrSerialDev->DevicePath,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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}
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