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ArmPlatformPkg/Sec: Moved Exception Vector Table to ArmPkg/DebugAgentBaseLib

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In case a DebugAgent library is supported for a specific debugger, we would
expect the exception be caught by DebugAgentLib.
The DebugAgentBaseLib exposes the cause of the exception to the user in the
Serial Terminal.

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13765 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2012-09-28 09:52:11 +00:00
parent 7ea4cf3f59
commit 9d6b024ded
15 changed files with 577 additions and 264 deletions
Download Patch File Download Diff File Expand all files Collapse all files

276
ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentException.S Normal file
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#------------------------------------------------------------------------------
#
# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
# Copyright (c) 2011 - 2012, ARM Ltd. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#------------------------------------------------------------------------------
#include <Library/PcdLib.h>
/*
This is the stack constructed by the exception handler (low address to high address)
# R0 - IFAR is EFI_SYSTEM_CONTEXT for ARM
Reg Offset
=== ======
R0 0x00 # stmfd SP!,{R0-R12}
R1 0x04
R2 0x08
R3 0x0c
R4 0x10
R5 0x14
R6 0x18
R7 0x1c
R8 0x20
R9 0x24
R10 0x28
R11 0x2c
R12 0x30
SP 0x34 # reserved via adding 0x20 (32) to the SP
LR 0x38
PC 0x3c
CPSR 0x40
DFSR 0x44
DFAR 0x48
IFSR 0x4c
IFAR 0x50
LR 0x54 # SVC Link register (we need to restore it)
LR 0x58 # pushed by srsfd
CPSR 0x5c
*/
GCC_ASM_EXPORT(DebugAgentVectorTable)
GCC_ASM_IMPORT(DefaultExceptionHandler)
.text
#if !defined(__APPLE__)
.fpu neon @ makes vpush/vpop assemble
#endif
.align 5
//
// This code gets copied to the ARM vector table
// ExceptionHandlersStart - ExceptionHandlersEnd gets copied
//
ASM_PFX(DebugAgentVectorTable):
b ASM_PFX(ResetEntry)
b ASM_PFX(UndefinedInstructionEntry)
b ASM_PFX(SoftwareInterruptEntry)
b ASM_PFX(PrefetchAbortEntry)
b ASM_PFX(DataAbortEntry)
b ASM_PFX(ReservedExceptionEntry)
b ASM_PFX(IrqEntry)
b ASM_PFX(FiqEntry)
ASM_PFX(ResetEntry):
srsdb #0x13! @ Store return state on SVC stack
@ We are already in SVC mode
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
mov R0,#0 @ ExceptionType
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
ASM_PFX(UndefinedInstructionEntry):
sub LR, LR, #4 @ Only -2 for Thumb, adjust in CommonExceptionEntry
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
mov R0,#1 @ ExceptionType
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
ASM_PFX(SoftwareInterruptEntry):
sub LR, LR, #4 @ Only -2 for Thumb, adjust in CommonExceptionEntry
srsdb #0x13! @ Store return state on SVC stack
@ We are already in SVC mode
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
mov R0,#2 @ ExceptionType
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
ASM_PFX(PrefetchAbortEntry):
sub LR,LR,#4
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
mov R0,#3 @ ExceptionType
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
ASM_PFX(DataAbortEntry):
sub LR,LR,#8
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
mov R0,#4
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
ASM_PFX(ReservedExceptionEntry):
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
mov R0,#5
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
ASM_PFX(IrqEntry):
sub LR,LR,#4
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
mov R0,#6 @ ExceptionType
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
ASM_PFX(FiqEntry):
sub LR,LR,#4
srsdb #0x13! @ Store return state on SVC stack
cps #0x13 @ Switch to SVC for common stack
stmfd SP!,{LR} @ Store the link register for the current mode
sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} @ Store the register state
@ Since we have already switch to SVC R8_fiq - R12_fiq
@ never get used or saved
mov R0,#7 @ ExceptionType
ldr R1,ASM_PFX(CommonExceptionEntry)
bx R1
//
// This gets patched by the C code that patches in the vector table
//
ASM_PFX(CommonExceptionEntry):
.word ASM_PFX(AsmCommonExceptionEntry)
ASM_PFX(ExceptionHandlersEnd):
//
// This code runs from CpuDxe driver loaded address. It is patched into
// CommonExceptionEntry.
//
ASM_PFX(AsmCommonExceptionEntry):
mrc p15, 0, R1, c6, c0, 2 @ Read IFAR
str R1, [SP, #0x50] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFAR
mrc p15, 0, R1, c5, c0, 1 @ Read IFSR
str R1, [SP, #0x4c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFSR
mrc p15, 0, R1, c6, c0, 0 @ Read DFAR
str R1, [SP, #0x48] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFAR
mrc p15, 0, R1, c5, c0, 0 @ Read DFSR
str R1, [SP, #0x44] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFSR
ldr R1, [SP, #0x5c] @ srsdb saved pre-exception CPSR on the stack
str R1, [SP, #0x40] @ Store it in EFI_SYSTEM_CONTEXT_ARM.CPSR
add R2, SP, #0x38 @ Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
and R3, R1, #0x1f @ Check CPSR to see if User or System Mode
cmp R3, #0x1f @ if ((CPSR == 0x10) || (CPSR == 0x1df))
cmpne R3, #0x10 @
stmeqed R2, {lr}^ @ save unbanked lr
@ else
stmneed R2, {lr} @ save SVC lr
ldr R5, [SP, #0x58] @ PC is the LR pushed by srsfd
@ Check to see if we have to adjust for Thumb entry
sub r4, r0, #1 @ if (ExceptionType == 1 || ExceptionType ==2)) {
cmp r4, #1 @ // UND & SVC have differnt LR adjust for Thumb
bhi NoAdjustNeeded
tst r1, #0x20 @ if ((CPSR & T)) == T) { // Thumb Mode on entry
addne R5, R5, #2 @ PC += 2@
str R5,[SP,#0x58] @ Update LR value pused by srsfd
NoAdjustNeeded:
str R5, [SP, #0x3c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.PC
sub R1, SP, #0x60 @ We pused 0x60 bytes on the stack
str R1, [SP, #0x34] @ Store it in EFI_SYSTEM_CONTEXT_ARM.SP
@ R0 is ExceptionType
mov R1,SP @ R1 is SystemContext
#if (FixedPcdGet32(PcdVFPEnabled))
vpush {d0-d15} @ save vstm registers in case they are used in optimizations
#endif
/*
VOID
EFIAPI
DefaultExceptionHandler (
IN EFI_EXCEPTION_TYPE ExceptionType, R0
IN OUT EFI_SYSTEM_CONTEXT SystemContext R1
)
*/
blx ASM_PFX(DefaultExceptionHandler) @ Call exception handler
#if (FixedPcdGet32(PcdVFPEnabled))
vpop {d0-d15}
#endif
ldr R1, [SP, #0x4c] @ Restore EFI_SYSTEM_CONTEXT_ARM.IFSR
mcr p15, 0, R1, c5, c0, 1 @ Write IFSR
ldr R1, [SP, #0x44] @ sRestore EFI_SYSTEM_CONTEXT_ARM.DFSR
mcr p15, 0, R1, c5, c0, 0 @ Write DFSR
ldr R1,[SP,#0x3c] @ EFI_SYSTEM_CONTEXT_ARM.PC
str R1,[SP,#0x58] @ Store it back to srsfd stack slot so it can be restored
ldr R1,[SP,#0x40] @ EFI_SYSTEM_CONTEXT_ARM.CPSR
str R1,[SP,#0x5c] @ Store it back to srsfd stack slot so it can be restored
add R3, SP, #0x54 @ Make R3 point to SVC LR saved on entry
add R2, SP, #0x38 @ Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
and R1, R1, #0x1f @ Check to see if User or System Mode
cmp R1, #0x1f @ if ((CPSR == 0x10) || (CPSR == 0x1f))
cmpne R1, #0x10 @
ldmeqed R2, {lr}^ @ restore unbanked lr
@ else
ldmneed R3, {lr} @ restore SVC lr, via ldmfd SP!, {LR}
ldmfd SP!,{R0-R12} @ Restore general purpose registers
@ Exception handler can not change SP
add SP,SP,#0x20 @ Clear out the remaining stack space
ldmfd SP!,{LR} @ restore the link register for this context
rfefd SP! @ return from exception via srsfd stack slot

273
ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentException.asm Normal file
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//------------------------------------------------------------------------------
//
// Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
// Copyright (c) 2011 - 2012, ARM Ltd. All rights reserved.<BR>
//
// This program and the accompanying materials
// are licensed and made available under the terms and conditions of the BSD License
// which accompanies this distribution. The full text of the license may be found at
// http://opensource.org/licenses/bsd-license.php
//
// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
//
//------------------------------------------------------------------------------
#include <Library/PcdLib.h>
/*
This is the stack constructed by the exception handler (low address to high address)
# R0 - IFAR is EFI_SYSTEM_CONTEXT for ARM
Reg Offset
=== ======
R0 0x00 # stmfd SP!,{R0-R12}
R1 0x04
R2 0x08
R3 0x0c
R4 0x10
R5 0x14
R6 0x18
R7 0x1c
R8 0x20
R9 0x24
R10 0x28
R11 0x2c
R12 0x30
SP 0x34 # reserved via adding 0x20 (32) to the SP
LR 0x38
PC 0x3c
CPSR 0x40
DFSR 0x44
DFAR 0x48
IFSR 0x4c
IFAR 0x50
LR 0x54 # SVC Link register (we need to restore it)
LR 0x58 # pushed by srsfd
CPSR 0x5c
*/
EXPORT DebugAgentVectorTable
IMPORT DefaultExceptionHandler
PRESERVE8
AREA DebugAgentException, CODE, READONLY, CODEALIGN, ALIGN=5
//
// This code gets copied to the ARM vector table
// ExceptionHandlersStart - ExceptionHandlersEnd gets copied
//
DebugAgentVectorTable FUNCTION
b ResetEntry
b UndefinedInstructionEntry
b SoftwareInterruptEntry
b PrefetchAbortEntry
b DataAbortEntry
b ReservedExceptionEntry
b IrqEntry
b FiqEntry
ENDFUNC
ResetEntry
srsfd #0x13! ; Store return state on SVC stack
; We are already in SVC mode
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
mov R0,#0 ; ExceptionType
ldr R1,CommonExceptionEntry
bx R1
UndefinedInstructionEntry
sub LR, LR, #4 ; Only -2 for Thumb, adjust in CommonExceptionEntry
srsfd #0x13! ; Store return state on SVC stack
cps #0x13 ; Switch to SVC for common stack
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
mov R0,#1 ; ExceptionType
ldr R1,CommonExceptionEntry;
bx R1
SoftwareInterruptEntry
sub LR, LR, #4 ; Only -2 for Thumb, adjust in CommonExceptionEntry
srsfd #0x13! ; Store return state on SVC stack
; We are already in SVC mode
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
mov R0,#2 ; ExceptionType
ldr R1,CommonExceptionEntry
bx R1
PrefetchAbortEntry
sub LR,LR,#4
srsfd #0x13! ; Store return state on SVC stack
cps #0x13 ; Switch to SVC for common stack
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
mov R0,#3 ; ExceptionType
ldr R1,CommonExceptionEntry
bx R1
DataAbortEntry
sub LR,LR,#8
srsfd #0x13! ; Store return state on SVC stack
cps #0x13 ; Switch to SVC for common stack
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
mov R0,#4 ; ExceptionType
ldr R1,CommonExceptionEntry
bx R1
ReservedExceptionEntry
srsfd #0x13! ; Store return state on SVC stack
cps #0x13 ; Switch to SVC for common stack
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
mov R0,#5 ; ExceptionType
ldr R1,CommonExceptionEntry
bx R1
IrqEntry
sub LR,LR,#4
srsfd #0x13! ; Store return state on SVC stack
cps #0x13 ; Switch to SVC for common stack
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
mov R0,#6 ; ExceptionType
ldr R1,CommonExceptionEntry
bx R1
FiqEntry
sub LR,LR,#4
srsfd #0x13! ; Store return state on SVC stack
cps #0x13 ; Switch to SVC for common stack
stmfd SP!,{LR} ; Store the link register for the current mode
sub SP,SP,#0x20 ; Save space for SP, LR, PC, IFAR - CPSR
stmfd SP!,{R0-R12} ; Store the register state
; Since we have already switch to SVC R8_fiq - R12_fiq
; never get used or saved
mov R0,#7 ; ExceptionType
ldr R1,CommonExceptionEntry
bx R1
//
// This gets patched by the C code that patches in the vector table
//
CommonExceptionEntry
dcd AsmCommonExceptionEntry
ExceptionHandlersEnd
//
// This code runs from CpuDxe driver loaded address. It is patched into
// CommonExceptionEntry.
//
AsmCommonExceptionEntry
mrc p15, 0, R1, c6, c0, 2 ; Read IFAR
str R1, [SP, #0x50] ; Store it in EFI_SYSTEM_CONTEXT_ARM.IFAR
mrc p15, 0, R1, c5, c0, 1 ; Read IFSR
str R1, [SP, #0x4c] ; Store it in EFI_SYSTEM_CONTEXT_ARM.IFSR
mrc p15, 0, R1, c6, c0, 0 ; Read DFAR
str R1, [SP, #0x48] ; Store it in EFI_SYSTEM_CONTEXT_ARM.DFAR
mrc p15, 0, R1, c5, c0, 0 ; Read DFSR
str R1, [SP, #0x44] ; Store it in EFI_SYSTEM_CONTEXT_ARM.DFSR
ldr R1, [SP, #0x5c] ; srsfd saved pre-exception CPSR on the stack
str R1, [SP, #0x40] ; Store it in EFI_SYSTEM_CONTEXT_ARM.CPSR
add R2, SP, #0x38 ; Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
and R3, R1, #0x1f ; Check CPSR to see if User or System Mode
cmp R3, #0x1f ; if ((CPSR == 0x10) || (CPSR == 0x1df))
cmpne R3, #0x10 ;
stmeqed R2, {lr}^ ; save unbanked lr
; else
stmneed R2, {lr} ; save SVC lr
ldr R5, [SP, #0x58] ; PC is the LR pushed by srsfd
; Check to see if we have to adjust for Thumb entry
sub r4, r0, #1 ; if (ExceptionType == 1 || ExceptionType ==2)) {
cmp r4, #1 ; // UND & SVC have differnt LR adjust for Thumb
bhi NoAdjustNeeded
tst r1, #0x20 ; if ((CPSR & T)) == T) { // Thumb Mode on entry
addne R5, R5, #2 ; PC += 2;
str R5,[SP,#0x58] ; Update LR value pused by srsfd
NoAdjustNeeded
str R5, [SP, #0x3c] ; Store it in EFI_SYSTEM_CONTEXT_ARM.PC
sub R1, SP, #0x60 ; We pused 0x60 bytes on the stack
str R1, [SP, #0x34] ; Store it in EFI_SYSTEM_CONTEXT_ARM.SP
; R0 is ExceptionType
mov R1,SP ; R1 is SystemContext
#if (FixedPcdGet32(PcdVFPEnabled))
vpush {d0-d15} ; save vstm registers in case they are used in optimizations
#endif
/*
VOID
EFIAPI
DefaultExceptionHandler (
IN EFI_EXCEPTION_TYPE ExceptionType, R0
IN OUT EFI_SYSTEM_CONTEXT SystemContext R1
)
*/
blx DefaultExceptionHandler ; Call exception handler
#if (FixedPcdGet32(PcdVFPEnabled))
vpop {d0-d15}
#endif
ldr R1, [SP, #0x4c] ; Restore EFI_SYSTEM_CONTEXT_ARM.IFSR
mcr p15, 0, R1, c5, c0, 1 ; Write IFSR
ldr R1, [SP, #0x44] ; sRestore EFI_SYSTEM_CONTEXT_ARM.DFSR
mcr p15, 0, R1, c5, c0, 0 ; Write DFSR
ldr R1,[SP,#0x3c] ; EFI_SYSTEM_CONTEXT_ARM.PC
str R1,[SP,#0x58] ; Store it back to srsfd stack slot so it can be restored
ldr R1,[SP,#0x40] ; EFI_SYSTEM_CONTEXT_ARM.CPSR
str R1,[SP,#0x5c] ; Store it back to srsfd stack slot so it can be restored
add R3, SP, #0x54 ; Make R3 point to SVC LR saved on entry
add R2, SP, #0x38 ; Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
and R1, R1, #0x1f ; Check to see if User or System Mode
cmp R1, #0x1f ; if ((CPSR == 0x10) || (CPSR == 0x1f))
cmpne R1, #0x10 ;
ldmeqed R2, {lr}^ ; restore unbanked lr
; else
ldmneed R3, {lr} ; restore SVC lr, via ldmfd SP!, {LR}
ldmfd SP!,{R0-R12} ; Restore general purpose registers
; Exception handler can not change SP
add SP,SP,#0x20 ; Clear out the remaining stack space
ldmfd SP!,{LR} ; restore the link register for this context
rfefd SP! ; return from exception via srsfd stack slot
END

351
ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.c Normal file
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/** @file
* Main file supporting the SEC Phase for Versatile Express
*
* Copyright (c) 2011-2012, ARM Limited. All rights reserved.
*
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include <Uefi.h>
#include <Library/ArmLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/DebugAgentLib.h>
#include <Library/PcdLib.h>
#include <Library/PeCoffExtraActionLib.h>
#include <Library/PeCoffLib.h>
#include <Pi/PiFirmwareFile.h>
#include <Pi/PiFirmwareVolume.h>
#define GET_OCCUPIED_SIZE(ActualSize, Alignment) \
(ActualSize) + (((Alignment) - ((ActualSize) & ((Alignment) - 1))) & ((Alignment) - 1))
// Vector Table for Sec Phase
VOID
DebugAgentVectorTable (
VOID
);
/**
Returns the highest bit set of the State field
@param ErasePolarity Erase Polarity as defined by EFI_FVB2_ERASE_POLARITY
in the Attributes field.
@param FfsHeader Pointer to FFS File Header
@retval the highest bit in the State field
**/
STATIC
EFI_FFS_FILE_STATE
GetFileState (
IN UINT8 ErasePolarity,
IN EFI_FFS_FILE_HEADER *FfsHeader
)
{
EFI_FFS_FILE_STATE FileState;
EFI_FFS_FILE_STATE HighestBit;
FileState = FfsHeader->State;
if (ErasePolarity != 0) {
FileState = (EFI_FFS_FILE_STATE)~FileState;
}
HighestBit = 0x80;
while (HighestBit != 0 && (HighestBit & FileState) == 0) {
HighestBit >>= 1;
}
return HighestBit;
}
/**
Calculates the checksum of the header of a file.
The header is a zero byte checksum, so zero means header is good
@param FfsHeader Pointer to FFS File Header
@retval Checksum of the header
**/
STATIC
UINT8
CalculateHeaderChecksum (
IN EFI_FFS_FILE_HEADER *FileHeader
)
{
UINT8 Sum;
// Calculate the sum of the header
Sum = CalculateSum8 ((CONST VOID*)FileHeader,sizeof(EFI_FFS_FILE_HEADER));
// State field (since this indicates the different state of file).
Sum = (UINT8)(Sum - FileHeader->State);
// Checksum field of the file is not part of the header checksum.
Sum = (UINT8)(Sum - FileHeader->IntegrityCheck.Checksum.File);
return Sum;
}
EFI_STATUS
GetFfsFile (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader,
IN EFI_FV_FILETYPE FileType,
OUT EFI_FFS_FILE_HEADER **FileHeader
)
{
UINT64 FvLength;
UINTN FileOffset;
EFI_FFS_FILE_HEADER *FfsFileHeader;
UINT8 ErasePolarity;
UINT8 FileState;
UINT32 FileLength;
UINT32 FileOccupiedSize;
ASSERT (FwVolHeader->Signature == EFI_FVH_SIGNATURE);
FvLength = FwVolHeader->FvLength;
FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FwVolHeader + FwVolHeader->HeaderLength);
FileOffset = FwVolHeader->HeaderLength;
if (FwVolHeader->Attributes & EFI_FVB2_ERASE_POLARITY) {
ErasePolarity = 1;
} else {
ErasePolarity = 0;
}
while (FileOffset < (FvLength - sizeof (EFI_FFS_FILE_HEADER))) {
// Get FileState which is the highest bit of the State
FileState = GetFileState (ErasePolarity, FfsFileHeader);
switch (FileState) {
case EFI_FILE_HEADER_INVALID:
FileOffset += sizeof(EFI_FFS_FILE_HEADER);
FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + sizeof(EFI_FFS_FILE_HEADER));
break;
case EFI_FILE_DATA_VALID:
case EFI_FILE_MARKED_FOR_UPDATE:
if (CalculateHeaderChecksum (FfsFileHeader) != 0) {
ASSERT (FALSE);
return EFI_NOT_FOUND;
}
if (FfsFileHeader->Type == FileType) {
*FileHeader = FfsFileHeader;
return EFI_SUCCESS;
}
FileLength = *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;
FileOccupiedSize = GET_OCCUPIED_SIZE(FileLength, 8);
FileOffset += FileOccupiedSize;
FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);
break;
case EFI_FILE_DELETED:
FileLength = *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;
FileOccupiedSize = GET_OCCUPIED_SIZE(FileLength, 8);
FileOffset += FileOccupiedSize;
FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);
break;
default:
return EFI_NOT_FOUND;
}
}
return EFI_NOT_FOUND;
}
EFI_STATUS
GetImageContext (
IN EFI_FFS_FILE_HEADER *FfsHeader,
OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext
)
{
EFI_STATUS Status;
UINTN ParsedLength;
UINTN SectionSize;
UINTN SectionLength;
EFI_COMMON_SECTION_HEADER *Section;
VOID *EfiImage;
UINTN ImageAddress;
EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *DebugEntry;
VOID *CodeViewEntryPointer;
Section = (EFI_COMMON_SECTION_HEADER *)(FfsHeader + 1);
SectionSize = *(UINT32 *)(FfsHeader->Size) & 0x00FFFFFF;
SectionSize -= sizeof (EFI_FFS_FILE_HEADER);
ParsedLength = 0;
EfiImage = NULL;
while (ParsedLength < SectionSize) {
if ((Section->Type == EFI_SECTION_PE32) || (Section->Type == EFI_SECTION_TE)) {
EfiImage = (EFI_IMAGE_OPTIONAL_HEADER_UNION*)(Section + 1);
break;
}
//
// Size is 24 bits wide so mask upper 8 bits.
// SectionLength is adjusted it is 4 byte aligned.
// Go to the next section
//
SectionLength = *(UINT32 *)Section->Size & 0x00FFFFFF;
SectionLength = GET_OCCUPIED_SIZE (SectionLength, 4);
ASSERT (SectionLength != 0);
ParsedLength += SectionLength;
Section = (EFI_COMMON_SECTION_HEADER *)((UINT8 *)Section + SectionLength);
}
if (EfiImage == NULL) {
return EFI_NOT_FOUND;
}
// Initialize the Image Context
ZeroMem (ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));
ImageContext->Handle = EfiImage;
ImageContext->ImageRead = PeCoffLoaderImageReadFromMemory;
Status = PeCoffLoaderGetImageInfo (ImageContext);
if (!EFI_ERROR(Status) && ((VOID*)ImageContext->DebugDirectoryEntryRva != NULL)) {
ImageAddress = ImageContext->ImageAddress;
if (ImageContext->IsTeImage) {
ImageAddress += sizeof (EFI_TE_IMAGE_HEADER) - ((EFI_TE_IMAGE_HEADER*)EfiImage)->StrippedSize;
}
DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY*)(ImageAddress + ImageContext->DebugDirectoryEntryRva);
if (DebugEntry->Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {
CodeViewEntryPointer = (VOID *) (ImageAddress + (UINTN) DebugEntry->RVA);
switch (* (UINT32 *) CodeViewEntryPointer) {
case CODEVIEW_SIGNATURE_NB10:
ImageContext->PdbPointer = (CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY);
break;
case CODEVIEW_SIGNATURE_RSDS:
ImageContext->PdbPointer = (CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY);
break;
case CODEVIEW_SIGNATURE_MTOC:
ImageContext->PdbPointer = (CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY);
break;
default:
break;
}
}
}
return Status;
}
/**
Initialize debug agent.
This function is used to set up debug environment to support source level debugging.
If certain Debug Agent Library instance has to save some private data in the stack,
this function must work on the mode that doesn't return to the caller, then
the caller needs to wrap up all rest of logic after InitializeDebugAgent() into one
function and pass it into InitializeDebugAgent(). InitializeDebugAgent() is
responsible to invoke the passing-in function at the end of InitializeDebugAgent().
If the parameter Function is not NULL, Debug Agent Libary instance will invoke it by
passing in the Context to be its parameter.
If Function() is NULL, Debug Agent Library instance will return after setup debug
environment.
@param[in] InitFlag Init flag is used to decide the initialize process.
@param[in] Context Context needed according to InitFlag; it was optional.
@param[in] Function Continue function called by debug agent library; it was
optional.
**/
VOID
EFIAPI
InitializeDebugAgent (
IN UINT32 InitFlag,
IN VOID *Context, OPTIONAL
IN DEBUG_AGENT_CONTINUE Function OPTIONAL
)
{
EFI_STATUS Status;
EFI_FFS_FILE_HEADER *FfsHeader;
PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
// Now we've got UART, make the check:
// - The Vector table must be 32-byte aligned
//TODO: Define a macro for the ARM Exception Table
ASSERT(((UINT32)DebugAgentVectorTable & ARM_VECTOR_TABLE_ALIGNMENT) == 0);
ArmWriteVBar (DebugAgentVectorTable);
// We use InitFlag to know if DebugAgent has been intialized from
// Sec (DEBUG_AGENT_INIT_PREMEM_SEC) or PrePi (DEBUG_AGENT_INIT_POSTMEM_SEC)
// modules
if (InitFlag == DEBUG_AGENT_INIT_PREMEM_SEC) {
//
// Get the Sec or PrePeiCore module (defined as SEC type module)
//
Status = GetFfsFile ((EFI_FIRMWARE_VOLUME_HEADER*)PcdGet32(PcdSecureFvBaseAddress), EFI_FV_FILETYPE_SECURITY_CORE, &FfsHeader);
if (!EFI_ERROR(Status)) {
Status = GetImageContext (FfsHeader,&ImageContext);
if (!EFI_ERROR(Status)) {
PeCoffLoaderRelocateImageExtraAction (&ImageContext);
}
}
} else if (InitFlag == DEBUG_AGENT_INIT_POSTMEM_SEC) {
//
// Get the PrePi or PrePeiCore module (defined as SEC type module)
//
Status = GetFfsFile ((EFI_FIRMWARE_VOLUME_HEADER*)PcdGet32(PcdFvBaseAddress), EFI_FV_FILETYPE_SECURITY_CORE, &FfsHeader);
if (!EFI_ERROR(Status)) {
Status = GetImageContext (FfsHeader,&ImageContext);
if (!EFI_ERROR(Status)) {
PeCoffLoaderRelocateImageExtraAction (&ImageContext);
}
}
//
// Get the PeiCore module (defined as PEI_CORE type module)
//
Status = GetFfsFile ((EFI_FIRMWARE_VOLUME_HEADER*)PcdGet32(PcdFvBaseAddress), EFI_FV_FILETYPE_PEI_CORE, &FfsHeader);
if (!EFI_ERROR(Status)) {
Status = GetImageContext (FfsHeader,&ImageContext);
if (!EFI_ERROR(Status)) {
PeCoffLoaderRelocateImageExtraAction (&ImageContext);
}
}
}
}
/**
Enable/Disable the interrupt of debug timer and return the interrupt state
prior to the operation.
If EnableStatus is TRUE, enable the interrupt of debug timer.
If EnableStatus is FALSE, disable the interrupt of debug timer.
@param[in] EnableStatus Enable/Disable.
@return FALSE always.
**/
BOOLEAN
EFIAPI
SaveAndSetDebugTimerInterrupt (
IN BOOLEAN EnableStatus
)
{
return FALSE;
}

42
ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf Normal file
View File

@@ -0,0 +1,42 @@
#
# Copyright (c) 2011-2012, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = DebugAgentSymbolsBaseLib
FILE_GUID = 9055e2e0-9b33-11e0-a7d7-0002a5d5c51b
MODULE_TYPE = BASE
VERSION_STRING = 1.0
LIBRARY_CLASS = DebugAgentLib
[Sources.common]
DebugAgentSymbolsBaseLib.c
DebugAgentException.asm | RVCT
DebugAgentException.S | GCC
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
ArmPkg/ArmPkg.dec
[LibraryClasses]
ArmLib
DebugLib
DefaultExceptionHandlerLib
PcdLib
PeCoffExtraActionLib
PeCoffLib
[Pcd]
gArmTokenSpaceGuid.PcdSecureFvBaseAddress
gArmTokenSpaceGuid.PcdFvBaseAddress