60274ccab8
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10446 6f19259b-4bc3-4df7-8a09-765794883524
728 lines
18 KiB
C
Executable File
728 lines
18 KiB
C
Executable File
/** @file
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Private include file for GDB stub
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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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#ifndef __GCC_DEBUG_AGENT_INTERNAL__
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#define __GCC_DEBUG_AGENT_INTERNAL__
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#include <Uefi.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/GdbSerialLib.h>
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#include <Library/PrintLib.h>
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#include <Library/CacheMaintenanceLib.h>
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#include <Library/DebugAgentTimerLib.h>
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#include <IndustryStandard/PeImage.h>
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#include <Protocol/DebugSupport.h>
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extern CONST CHAR8 mHexToStr[];
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// maximum size of input and output buffers
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// This value came from the show remote command of the gdb we tested against
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#define MAX_BUF_SIZE 2000
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// maximum size of address buffer
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#define MAX_ADDR_SIZE 32
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// maximum size of register number buffer
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#define MAX_REG_NUM_BUF_SIZE 32
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// maximum size of length buffer
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#define MAX_LENGTH_SIZE 32
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// maximum size of T signal members
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#define MAX_T_SIGNAL_SIZE 64
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// the mask used to clear all the cache
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#define TF_BIT 0x00000100
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//
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// GDB Signal definitions - generic names for interrupts
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//
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#define GDB_SIGINT 2 // Interrupt process via ctrl-c
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#define GDB_SIGILL 4 // Illegal instruction
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#define GDB_SIGTRAP 5 // Trace Trap (Breakpoint and SingleStep)
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#define GDB_SIGEMT 7 // Emulator Trap
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#define GDB_SIGFPE 8 // Floating point exception
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#define GDB_SIGSEGV 11 // Setgment violation, page fault
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//
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// GDB File I/O Error values, zero means no error
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// Includes all general GDB Unix like error values
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//
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#define GDB_EBADMEMADDRBUFSIZE 11 // the buffer that stores memory Address to be read from/written to is not the right size
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#define GDB_EBADMEMLENGBUFSIZE 12 // the buffer that stores Length is not the right size
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#define GDB_EBADMEMLENGTH 13 // Length, the given number of bytes to read or write, is not the right size
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#define GDB_EBADMEMDATA 14 // one of the bytes or nibbles of the memory is leess than 0
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#define GDB_EBADMEMDATASIZE 15 // the memory data, 'XX..', is too short or too long
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#define GDB_EBADBUFSIZE 21 // the buffer created is not the correct size
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#define GDB_EINVALIDARG 31 // argument is invalid
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#define GDB_ENOSPACE 41 //
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#define GDB_EINVALIDBRKPOINTTYPE 51 // the breakpoint type is not recognized
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#define GDB_EINVALIDREGNUM 61 // given register number is not valid: either <0 or >=Number of Registers
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#define GDB_EUNKNOWN 255 // unknown
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//
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// These devices are open by GDB so we can just read and write to them
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//
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#define GDB_STDIN 0x00
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#define GDB_STDOUT 0x01
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#define GDB_STDERR 0x02
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//
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//Define Register size for different architectures
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//
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#if defined (MDE_CPU_IA32)
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#define REG_SIZE 32
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#elif defined (MDE_CPU_X64)
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#define REG_SIZE 64
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#elif defined (MDE_CPU_ARM)
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#define REG_SIZE 32
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#endif
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typedef struct {
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EFI_EXCEPTION_TYPE Exception;
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UINT8 SignalNo;
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} EFI_EXCEPTION_TYPE_ENTRY;
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#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
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//
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// Byte packed structure for DR6
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// 32-bits on IA-32
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// 64-bits on X64. The upper 32-bits on X64 are reserved
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//
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typedef union {
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struct {
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UINT32 B0:1; // Breakpoint condition detected
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UINT32 B1:1; // Breakpoint condition detected
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UINT32 B2:1; // Breakpoint condition detected
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UINT32 B3:1; // Breakpoint condition detected
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UINT32 Reserved_1:9; // Reserved
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UINT32 BD:1; // Debug register access detected
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UINT32 BS:1; // Single step
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UINT32 BT:1; // Task switch
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UINT32 Reserved_2:16; // Reserved
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} Bits;
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UINTN UintN;
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} IA32_DR6;
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//
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// Byte packed structure for DR7
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// 32-bits on IA-32
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// 64-bits on X64. The upper 32-bits on X64 are reserved
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//
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typedef union {
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struct {
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UINT32 L0:1; // Local breakpoint enable
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UINT32 G0:1; // Global breakpoint enable
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UINT32 L1:1; // Local breakpoint enable
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UINT32 G1:1; // Global breakpoint enable
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UINT32 L2:1; // Local breakpoint enable
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UINT32 G2:1; // Global breakpoint enable
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UINT32 L3:1; // Local breakpoint enable
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UINT32 G3:1; // Global breakpoint enable
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UINT32 LE:1; // Local exact breakpoint enable
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UINT32 GE:1; // Global exact breakpoint enable
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UINT32 Reserved_1:3; // Reserved
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UINT32 GD:1; // Global detect enable
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UINT32 Reserved_2:2; // Reserved
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UINT32 RW0:2; // Read/Write field
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UINT32 LEN0:2; // Length field
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UINT32 RW1:2; // Read/Write field
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UINT32 LEN1:2; // Length field
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UINT32 RW2:2; // Read/Write field
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UINT32 LEN2:2; // Length field
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UINT32 RW3:2; // Read/Write field
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UINT32 LEN3:2; // Length field
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} Bits;
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UINTN UintN;
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} IA32_DR7;
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#endif /* if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) */
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typedef enum {
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InstructionExecution, //Hardware breakpoint
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DataWrite, //watch
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DataRead, //rwatch
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DataReadWrite, //awatch
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SoftwareBreakpoint, //Software breakpoint
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NotSupported
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} BREAK_TYPE;
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//
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// Array of exception types that need to be hooked by the debugger
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//
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extern EFI_EXCEPTION_TYPE_ENTRY gExceptionType[];
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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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extern BOOLEAN gProcessingFPacket;
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/**
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Return the number of entries in the gExceptionType[]
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@retval UINTN, the number of entries in the gExceptionType[] array.
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**/
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UINTN
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MaxEfiException (
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VOID
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);
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/**
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Check to see if the ISA is supported.
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ISA = Instruction Set Architecture
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@retval TRUE if Isa is supported,
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FALSE otherwise.
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**/
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BOOLEAN
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CheckIsa (
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IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa
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);
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/**
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Send the T signal with the given exception type (in gdb order) and possibly with n:r pairs related to the watchpoints
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@param SystemContext Register content at time of the exception
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@param GdbExceptionType GDB exception type
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**/
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VOID
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GdbSendTSignal (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN UINT8 GdbExceptionType
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);
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/**
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Translates the EFI mapping to GDB mapping
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@param EFIExceptionType EFI Exception that is being processed
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@retval UINTN that corresponds to EFIExceptionType's GDB exception type number
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**/
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UINT8
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ConvertEFItoGDBtype (
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IN EFI_EXCEPTION_TYPE EFIExceptionType
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);
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/**
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Empties the given buffer
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@param *Buf pointer to the first element in buffer to be emptied
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**/
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VOID
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EmptyBuffer (
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IN CHAR8 *Buf
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);
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/**
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Converts an 8-bit Hex Char into a INTN.
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@param Char - the hex character to be converted into UINTN
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@retval a INTN, from 0 to 15, that corressponds to Char
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-1 if Char is not a hex character
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**/
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INTN
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HexCharToInt (
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IN CHAR8 Char
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);
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/** 'E NN'
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Send an error with the given error number after converting to hex.
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The error number is put into the buffer in hex. '255' is the biggest errno we can send.
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ex: 162 will be sent as A2.
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@param errno the error number that will be sent
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**/
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VOID
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EFIAPI
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SendError (
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IN UINT8 ErrorNum
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);
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/**
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Send 'OK' when the function is done executing successfully.
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**/
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VOID
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SendSuccess (
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VOID
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);
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/**
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Send empty packet to specify that particular command/functionality is not supported.
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**/
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VOID
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SendNotSupported (
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VOID
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);
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/** ‘p n’
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Reads the n-th register's value into an output buffer and sends it as a packet
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@param SystemContext Register content at time of the exception
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@param InBuffer This is the input buffer received from gdb server
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**/
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VOID
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ReadNthRegister (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN CHAR8 *InBuffer
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);
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/** ‘g’
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Reads the general registers into an output buffer and sends it as a packet
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@param SystemContext Register content at time of the exception
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**/
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VOID
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ReadGeneralRegisters (
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IN EFI_SYSTEM_CONTEXT SystemContext
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);
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/** ‘P n...=r...’
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Writes the new value of n-th register received into the input buffer to the n-th register
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@param SystemContext Register content at time of the exception
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@param InBuffer This is the input buffer received from gdb server
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**/
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VOID
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WriteNthRegister (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN CHAR8 *InBuffer
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);
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/** ‘G XX...’
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Writes the new values received into the input buffer to the general registers
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@param SystemContext Register content at time of the exception
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@param InBuffer Pointer to the input buffer received from gdb server
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**/
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VOID
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WriteGeneralRegisters (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN CHAR8 *InBuffer
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);
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/** ‘m addr,length ’
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Find the Length of the area to read and the start addres. Finally, pass them to
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another function, TransferFromMemToOutBufAndSend, that will read from that memory space and
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send it as a packet.
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@param *PacketData Pointer to Payload data for the packet
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**/
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VOID
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ReadFromMemory (
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IN CHAR8 *PacketData
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);
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/** ‘M addr,length :XX...’
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Find the Length of the area in bytes to write and the start addres. Finally, pass them to
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another function, TransferFromInBufToMem, that will write to that memory space the info in
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the input buffer.
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@param PacketData Pointer to Payload data for the packet
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**/
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VOID
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WriteToMemory (
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IN CHAR8 *PacketData
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);
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/** ‘c [addr ]’
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Continue. addr is Address to resume. If addr is omitted, resume at current
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Address.
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@param SystemContext Register content at time of the exception
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@param *PacketData Pointer to PacketData
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**/
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VOID
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ContinueAtAddress (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN CHAR8 *PacketData
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);
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/** ‘s [addr ]’
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Single step. addr is the Address at which to resume. If addr is omitted, resume
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at same Address.
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@param SystemContext Register content at time of the exception
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@param PacketData Pointer to Payload data for the packet
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**/
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VOID
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SingleStep (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN CHAR8 *PacketData
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);
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/**
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Insert Single Step in the SystemContext
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@param SystemContext Register content at time of the exception
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**/
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VOID
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AddSingleStep (
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IN EFI_SYSTEM_CONTEXT SystemContext
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);
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/**
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Remove Single Step in the SystemContext
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@param SystemContext Register content at time of the exception
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**/
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VOID
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RemoveSingleStep (
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IN EFI_SYSTEM_CONTEXT SystemContext
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);
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/**
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‘Z1, [addr], [length]’
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‘Z2, [addr], [length]’
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‘Z3, [addr], [length]’
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‘Z4, [addr], [length]’
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Insert hardware breakpoint/watchpoint at address addr of size length
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@param SystemContext Register content at time of the exception
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@param *PacketData Pointer to the Payload data for the packet
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**/
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VOID
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EFIAPI
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InsertBreakPoint(
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN CHAR8 *PacketData
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);
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/**
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‘z1, [addr], [length]’
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‘z2, [addr], [length]’
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‘z3, [addr], [length]’
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‘z4, [addr], [length]’
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Remove hardware breakpoint/watchpoint at address addr of size length
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@param SystemContext Register content at time of the exception
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@param *PacketData Pointer to the Payload data for the packet
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**/
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VOID
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EFIAPI
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RemoveBreakPoint(
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN CHAR8 *PacketData
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);
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/**
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Exception Hanldler for GDB. It will be called for all exceptions
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registered via the gExceptionType[] array.
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@param ExceptionType Exception that is being processed
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@param SystemContext Register content at time of the exception
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**/
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VOID
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EFIAPI
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GdbExceptionHandler (
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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);
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/**
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Periodic callback for GDB. This function is used to catch a ctrl-c or other
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break in type command from GDB.
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@param SystemContext Register content at time of the call
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**/
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VOID
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EFIAPI
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GdbPeriodicCallBack (
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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);
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/**
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Make two serail 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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Send a GDB Remote Serial Protocol Packet
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$PacketData#checksum PacketData is passed in and this function adds the packet prefix '$',
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the packet teminating character '#' and the two digit checksum.
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If an ack '+' is not sent resend the packet, but timeout eventually so we don't end up
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in an infinit loop. This is so if you unplug the debugger code just keeps running
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@param PacketData Payload data for the packet
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@retval Number of bytes of packet data sent.
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**/
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UINTN
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SendPacket (
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IN CHAR8 *PacketData
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);
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/**
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Receive a GDB Remote Serial Protocol Packet
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$PacketData#checksum PacketData is passed in and this function adds the packet prefix '$',
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the packet teminating character '#' and the two digit checksum.
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If host re-starts sending a packet without ending the previous packet, only the last valid packet is proccessed.
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(In other words, if received packet is '$12345$12345$123456#checksum', only '$123456#checksum' will be processed.)
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If an ack '+' is not sent resend the packet
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@param PacketData Payload data for the packet
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@retval Number of bytes of packet data received.
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**/
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UINTN
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ReceivePacket (
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OUT CHAR8 *PacketData,
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IN UINTN PacketDataSize
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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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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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UINTN *
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FindPointerToRegister (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN UINTN RegNumber
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);
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CHAR8 *
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BasicReadRegister (
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IN EFI_SYSTEM_CONTEXT SystemContext,
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IN UINTN RegNumber,
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IN CHAR8 *OutBufPtr
|
||
);
|
||
|
||
VOID
|
||
TransferFromInBufToMem (
|
||
IN UINTN Length,
|
||
IN UINT8 *Address,
|
||
IN CHAR8 *NewData
|
||
);
|
||
|
||
VOID
|
||
TransferFromMemToOutBufAndSend (
|
||
IN UINTN Length,
|
||
IN UINT8 *Address
|
||
);
|
||
|
||
CHAR8 *
|
||
BasicWriteRegister (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
IN UINTN RegNumber,
|
||
IN CHAR8 *InBufPtr
|
||
);
|
||
|
||
VOID
|
||
PrintReg (
|
||
EFI_SYSTEM_CONTEXT SystemContext
|
||
);
|
||
|
||
UINTN
|
||
ParseBreakpointPacket (
|
||
IN CHAR8 *PacketData,
|
||
OUT UINTN *Type,
|
||
OUT UINTN *Address,
|
||
OUT UINTN *Length
|
||
);
|
||
|
||
UINTN
|
||
GetBreakpointDataAddress (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
IN UINTN BreakpointNumber
|
||
);
|
||
|
||
UINTN
|
||
GetBreakpointDetected (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext
|
||
);
|
||
|
||
BREAK_TYPE
|
||
GetBreakpointType (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
IN UINTN BreakpointNumber
|
||
);
|
||
|
||
UINTN
|
||
ConvertLengthData (
|
||
IN UINTN Length
|
||
);
|
||
|
||
EFI_STATUS
|
||
FindNextFreeDebugRegister (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
OUT UINTN *Register
|
||
);
|
||
|
||
EFI_STATUS
|
||
EnableDebugRegister (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
IN UINTN Register,
|
||
IN UINTN Address,
|
||
IN UINTN Length,
|
||
IN UINTN Type
|
||
);
|
||
|
||
EFI_STATUS
|
||
FindMatchingDebugRegister (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
IN UINTN Address,
|
||
IN UINTN Length,
|
||
IN UINTN Type,
|
||
OUT UINTN *Register
|
||
);
|
||
|
||
EFI_STATUS
|
||
DisableDebugRegister (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
IN UINTN Register
|
||
);
|
||
|
||
VOID
|
||
InitializeProcessor (
|
||
VOID
|
||
);
|
||
|
||
/**
|
||
Send the T signal with the given exception type (in gdb order) and possibly with n:r pairs related to the watchpoints
|
||
|
||
@param SystemContext Register content at time of the exception
|
||
@param GdbExceptionType GDB exception type
|
||
**/
|
||
VOID
|
||
ProcessorSendTSignal (
|
||
IN EFI_SYSTEM_CONTEXT SystemContext,
|
||
IN UINT8 GdbExceptionType,
|
||
IN OUT CHAR8 *TSignalPtr,
|
||
IN UINTN SizeOfBuffer
|
||
);
|
||
|
||
/**
|
||
Check to see if this exception is related to ctrl-c handling.
|
||
|
||
@param ExceptionType Exception that is being processed
|
||
@param SystemContext Register content at time of the exception
|
||
|
||
@return TRUE This was a ctrl-c check that did not find a ctrl-c
|
||
@return FALSE This was not a ctrl-c check or some one hit ctrl-c
|
||
**/
|
||
BOOLEAN
|
||
ProcessorControlC (
|
||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||
IN OUT EFI_SYSTEM_CONTEXT SystemContext
|
||
);
|
||
|
||
|
||
/**
|
||
Initialize debug agent.
|
||
|
||
This function is used to set up debug enviroment. It may enable interrupts.
|
||
|
||
@param[in] InitFlag Init flag is used to decide initialize process.
|
||
@param[in] Context Context needed according to InitFlag, it was optional.
|
||
|
||
**/
|
||
VOID
|
||
EFIAPI
|
||
DebugAgentHookExceptions (
|
||
IN UINT32 InitFlag,
|
||
IN VOID *Context OPTIONAL
|
||
);
|
||
|
||
|
||
#endif
|