* [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message
@ 2019-01-15 8:23 Ard Biesheuvel
2019-01-15 8:23 ` [PATCH v2 1/5] ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling Ard Biesheuvel
` (5 more replies)
0 siblings, 6 replies; 11+ messages in thread
From: Ard Biesheuvel @ 2019-01-15 8:23 UTC (permalink / raw)
To: edk2-devel; +Cc: leif.lindholm, lersek, Ard Biesheuvel
When running with a graphical console, no message whatsoever is printed
when the systems hits an unexpected exception and hangs, because even
the minimal 'exception occurred' message is only sent to the serial port.
So let's fix that, by updating DefaultExceptionHandlerLib to take the
availability of a console into account. (#5)
This requires some preparatory decruftication so that we can safely refer
to the system table and console (#1 .. #4).
Changes since v1:
- split off ArmVirtPkg patch (#3)
- always send minimal error message to the serial port before attempting to
send it to console->stdout as well (which is more likely to fail) (#5)
- add Leif's R-b to the series
Ard Biesheuvel (5):
ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling
ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context
ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase
ArmPkg/DefaultExceptionHandlerLib: drop BASE variant
ArmPkg/DefaultExceptionHandlerLib: use console if available
ArmPkg/ArmPkg.dsc | 1 -
.../AArch64/DebugAgentException.S | 96 ------
.../Arm/DebugAgentException.S | 277 ------------------
.../Arm/DebugAgentException.asm | 273 -----------------
.../DebugAgentSymbolsBaseLib.c | 7 -
.../DebugAgentSymbolsBaseLib.inf | 9 -
.../AArch64/DefaultExceptionHandler.c | 12 +-
.../Arm/DefaultExceptionHandler.c | 7 +-
.../DefaultExceptionHandlerBase.c | 35 ---
.../DefaultExceptionHandlerLib.inf | 5 +-
.../DefaultExceptionHandlerLibBase.inf | 45 ---
ArmVirtPkg/ArmVirt.dsc.inc | 1 -
12 files changed, 19 insertions(+), 749 deletions(-)
delete mode 100644 ArmPkg/Library/DebugAgentSymbolsBaseLib/AArch64/DebugAgentException.S
delete mode 100644 ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.S
delete mode 100644 ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.asm
delete mode 100644 ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerBase.c
delete mode 100644 ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf
--
2.17.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH v2 1/5] ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling 2019-01-15 8:23 [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel @ 2019-01-15 8:23 ` Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 2/5] ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context Ard Biesheuvel ` (4 subsequent siblings) 5 siblings, 0 replies; 11+ messages in thread From: Ard Biesheuvel @ 2019-01-15 8:23 UTC (permalink / raw) To: edk2-devel; +Cc: leif.lindholm, lersek, Ard Biesheuvel DebugAgentSymbolsBaseLib is an optional library that is in charge of extracting debug headers from SEC and PEI_CORE images in memory so the filename and the offset in memory can be reported via the UART, allowing a developer to load debugging symbols into his debugger. Interestingly enough, DebugAgentSymbolsBaseLib is also in charge of exception handling before this duty is taken over by either the PEI core, or the CPU DXE driver when running under PrePi. Since exceptions are not actually handled at all on AArch64, and simply routed to the DefaultExceptionHandlerLib (for which a special version has been created to be usable this early), let's get rid of this dubious functionality altogether. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> --- ArmPkg/Library/DebugAgentSymbolsBaseLib/AArch64/DebugAgentException.S | 96 ------- ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.S | 277 -------------------- ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.asm | 273 ------------------- ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.c | 7 - ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf | 9 - 5 files changed, 662 deletions(-) diff --git a/ArmPkg/Library/DebugAgentSymbolsBaseLib/AArch64/DebugAgentException.S b/ArmPkg/Library/DebugAgentSymbolsBaseLib/AArch64/DebugAgentException.S deleted file mode 100644 index f33a07a19bad..000000000000 --- a/ArmPkg/Library/DebugAgentSymbolsBaseLib/AArch64/DebugAgentException.S +++ /dev/null @@ -1,96 +0,0 @@ -#------------------------------------------------------------------------------ -# -# Copyright (c) 2011 - 2013, 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 <Chipset/AArch64.h> - -GCC_ASM_IMPORT(DefaultExceptionHandler) - -.text -VECTOR_BASE(DebugAgentVectorTable) - -// -// Current EL with SP0 : 0x0 - 0x180 -// -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SP0_SYNC) -ASM_PFX(SynchronousExceptionSP0): - b ASM_PFX(SynchronousExceptionSP0) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SP0_IRQ) -ASM_PFX(IrqSP0): - b ASM_PFX(IrqSP0) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SP0_FIQ) -ASM_PFX(FiqSP0): - b ASM_PFX(FiqSP0) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SP0_SERR) -ASM_PFX(SErrorSP0): - b ASM_PFX(SErrorSP0) - -// -// Current EL with SPx: 0x200 - 0x380 -// -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SPx_SYNC) -ASM_PFX(SynchronousExceptionSPx): - b ASM_PFX(SynchronousExceptionSPx) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SPx_IRQ) -ASM_PFX(IrqSPx): - b ASM_PFX(IrqSPx) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SPx_FIQ) -ASM_PFX(FiqSPx): - b ASM_PFX(FiqSPx) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_CUR_SPx_SERR) -ASM_PFX(SErrorSPx): - b ASM_PFX(SErrorSPx) - -/* Lower EL using AArch64 : 0x400 - 0x580 */ -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A64_SYNC) -ASM_PFX(SynchronousExceptionA64): - b ASM_PFX(SynchronousExceptionA64) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A64_IRQ) -ASM_PFX(IrqA64): - b ASM_PFX(IrqA64) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A64_FIQ) -ASM_PFX(FiqA64): - b ASM_PFX(FiqA64) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A64_SERR) -ASM_PFX(SErrorA64): - b ASM_PFX(SErrorA64) - -// -// Lower EL using AArch32 : 0x600 - 0x780 -// -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A32_SYNC) -ASM_PFX(SynchronousExceptionA32): - b ASM_PFX(SynchronousExceptionA32) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A32_IRQ) -ASM_PFX(IrqA32): - b ASM_PFX(IrqA32) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A32_FIQ) -ASM_PFX(FiqA32): - b ASM_PFX(FiqA32) - -VECTOR_ENTRY(DebugAgentVectorTable, ARM_VECTOR_LOW_A32_SERR) -ASM_PFX(SErrorA32): - b ASM_PFX(SErrorA32) - -VECTOR_END(DebugAgentVectorTable) diff --git a/ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.S b/ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.S deleted file mode 100644 index 215181460803..000000000000 --- a/ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.S +++ /dev/null @@ -1,277 +0,0 @@ -#------------------------------------------------------------------------------ -# -# 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 -.syntax unified -#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 @ - stmdaeq R2, {lr}^ @ save unbanked lr - @ else - stmdane 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 different 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 @ - ldmibeq R2, {lr}^ @ restore unbanked lr - @ else - ldmibne 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 - diff --git a/ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.asm b/ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.asm deleted file mode 100644 index cf59447bed10..000000000000 --- a/ArmPkg/Library/DebugAgentSymbolsBaseLib/Arm/DebugAgentException.asm +++ /dev/null @@ -1,273 +0,0 @@ -//------------------------------------------------------------------------------ -// -// 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 different 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 diff --git a/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.c b/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.c index 9c0cf0de38e1..f47f4250d1e8 100644 --- a/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.c +++ b/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.c @@ -14,7 +14,6 @@ **/ #include <Uefi.h> -#include <Library/ArmLib.h> #include <Library/BaseLib.h> #include <Library/BaseMemoryLib.h> #include <Library/DebugLib.h> @@ -283,12 +282,6 @@ InitializeDebugAgent ( EFI_FFS_FILE_HEADER *FfsHeader; PE_COFF_LOADER_IMAGE_CONTEXT ImageContext; - // Now we've got UART, check the Debug Agent Vector Table - // Note: The AArch64 Vector table must be 2k-byte aligned - if this assertion fails ensure - // 'Align=4K' is defined into your FDF for this module. - ASSERT (((UINTN)DebugAgentVectorTable & ARM_VECTOR_TABLE_ALIGNMENT) == 0); - ArmWriteVBar ((UINTN)DebugAgentVectorTable); - // We use InitFlag to know if DebugAgent has been initialized from // Sec (DEBUG_AGENT_INIT_PREMEM_SEC) or PrePi (DEBUG_AGENT_INIT_POSTMEM_SEC) // modules diff --git a/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf b/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf index 6b784f749b5e..671c1b6474b2 100644 --- a/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf +++ b/ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf @@ -22,22 +22,13 @@ [Defines] [Sources.common] DebugAgentSymbolsBaseLib.c -[Sources.ARM] - Arm/DebugAgentException.asm | RVCT - Arm/DebugAgentException.S | GCC - -[Sources.AARCH64] - AArch64/DebugAgentException.S - [Packages] MdePkg/MdePkg.dec MdeModulePkg/MdeModulePkg.dec ArmPkg/ArmPkg.dec [LibraryClasses] - ArmLib DebugLib - DefaultExceptionHandlerLib PcdLib PeCoffExtraActionLib PeCoffLib -- 2.17.1 ^ permalink raw reply related [flat|nested] 11+ messages in thread
* [PATCH v2 2/5] ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context 2019-01-15 8:23 [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 1/5] ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling Ard Biesheuvel @ 2019-01-15 8:23 ` Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 3/5] ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase Ard Biesheuvel ` (3 subsequent siblings) 5 siblings, 0 replies; 11+ messages in thread From: Ard Biesheuvel @ 2019-01-15 8:23 UTC (permalink / raw) To: edk2-devel; +Cc: leif.lindholm, lersek, Ard Biesheuvel Declare that this library is only usable in the context of DXE core or a DXE driver. Set the MODULE_TYPE to BASE: this only affects the prototype of the constructor (if present) but doesn't actually restrict the usage context otherwise. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> --- ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf index f5421b1240a1..7609f82d89a1 100644 --- a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf @@ -17,9 +17,9 @@ [Defines] INF_VERSION = 0x00010005 BASE_NAME = DefaultExceptionHandlerLib FILE_GUID = EACDB354-DF1A-4AF9-A171-499737ED818F - MODULE_TYPE = UEFI_DRIVER + MODULE_TYPE = BASE VERSION_STRING = 1.0 - LIBRARY_CLASS = DefaultExceptionHandlerLib + LIBRARY_CLASS = DefaultExceptionHandlerLib|DXE_CORE DXE_DRIVER [Sources.common] DefaultExceptionHandlerUefi.c -- 2.17.1 ^ permalink raw reply related [flat|nested] 11+ messages in thread
* [PATCH v2 3/5] ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase 2019-01-15 8:23 [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 1/5] ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 2/5] ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context Ard Biesheuvel @ 2019-01-15 8:23 ` Ard Biesheuvel 2019-01-15 10:12 ` Laszlo Ersek 2019-01-15 8:23 ` [PATCH v2 4/5] ArmPkg/DefaultExceptionHandlerLib: drop BASE variant Ard Biesheuvel ` (2 subsequent siblings) 5 siblings, 1 reply; 11+ messages in thread From: Ard Biesheuvel @ 2019-01-15 8:23 UTC (permalink / raw) To: edk2-devel; +Cc: leif.lindholm, lersek, Ard Biesheuvel Drop the reference to ArmPkg/DefaultExceptionHandlerLibBase, which is no longer used anywhere now that DebugAgentSymbolsBaseLib no longer incorporates a vector table and exception handling. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> --- ArmVirtPkg/ArmVirt.dsc.inc | 1 - 1 file changed, 1 deletion(-) diff --git a/ArmVirtPkg/ArmVirt.dsc.inc b/ArmVirtPkg/ArmVirt.dsc.inc index 89c2db074711..c47955be940c 100644 --- a/ArmVirtPkg/ArmVirt.dsc.inc +++ b/ArmVirtPkg/ArmVirt.dsc.inc @@ -174,7 +174,6 @@ [LibraryClasses.common.SEC] BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf DebugAgentLib|ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf - DefaultExceptionHandlerLib|ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf SerialPortLib|ArmVirtPkg/Library/FdtPL011SerialPortLib/EarlyFdtPL011SerialPortLib.inf HobLib|MdePkg/Library/PeiHobLib/PeiHobLib.inf PeiServicesLib|MdePkg/Library/PeiServicesLib/PeiServicesLib.inf -- 2.17.1 ^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH v2 3/5] ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase 2019-01-15 8:23 ` [PATCH v2 3/5] ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase Ard Biesheuvel @ 2019-01-15 10:12 ` Laszlo Ersek 0 siblings, 0 replies; 11+ messages in thread From: Laszlo Ersek @ 2019-01-15 10:12 UTC (permalink / raw) To: Ard Biesheuvel, edk2-devel On 01/15/19 09:23, Ard Biesheuvel wrote: > Drop the reference to ArmPkg/DefaultExceptionHandlerLibBase, which > is no longer used anywhere now that DebugAgentSymbolsBaseLib no > longer incorporates a vector table and exception handling. > > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> > Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> > --- > ArmVirtPkg/ArmVirt.dsc.inc | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/ArmVirtPkg/ArmVirt.dsc.inc b/ArmVirtPkg/ArmVirt.dsc.inc > index 89c2db074711..c47955be940c 100644 > --- a/ArmVirtPkg/ArmVirt.dsc.inc > +++ b/ArmVirtPkg/ArmVirt.dsc.inc > @@ -174,7 +174,6 @@ [LibraryClasses.common.SEC] > BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf > > DebugAgentLib|ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf > - DefaultExceptionHandlerLib|ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf > SerialPortLib|ArmVirtPkg/Library/FdtPL011SerialPortLib/EarlyFdtPL011SerialPortLib.inf > HobLib|MdePkg/Library/PeiHobLib/PeiHobLib.inf > PeiServicesLib|MdePkg/Library/PeiServicesLib/PeiServicesLib.inf > Reviewed-by: Laszlo Ersek <lersek@redhat.com> Thanks! Laszlo ^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH v2 4/5] ArmPkg/DefaultExceptionHandlerLib: drop BASE variant 2019-01-15 8:23 [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel ` (2 preceding siblings ...) 2019-01-15 8:23 ` [PATCH v2 3/5] ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase Ard Biesheuvel @ 2019-01-15 8:23 ` Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 5/5] ArmPkg/DefaultExceptionHandlerLib: use console if available Ard Biesheuvel 2019-01-16 20:36 ` [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel 5 siblings, 0 replies; 11+ messages in thread From: Ard Biesheuvel @ 2019-01-15 8:23 UTC (permalink / raw) To: edk2-devel; +Cc: leif.lindholm, lersek, Ard Biesheuvel Drop the redundant BASE variant, which is no longer used anywhere now that DebugAgentSymbolsBaseLib no longer incorporates a vector table and exception handling. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> --- ArmPkg/ArmPkg.dsc | 1 - ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerBase.c | 35 --------------- ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf | 45 -------------------- 3 files changed, 81 deletions(-) diff --git a/ArmPkg/ArmPkg.dsc b/ArmPkg/ArmPkg.dsc index 5d83c18b143e..d9f9935d70b6 100644 --- a/ArmPkg/ArmPkg.dsc +++ b/ArmPkg/ArmPkg.dsc @@ -141,7 +141,6 @@ [Components.common] ArmPkg/Library/ArmGicArchSecLib/ArmGicArchSecLib.inf ArmPkg/Library/ArmLib/ArmBaseLib.inf ArmPkg/Library/ArmSoftFloatLib/ArmSoftFloatLib.inf - ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf ArmPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerBase.c b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerBase.c deleted file mode 100644 index 4a54298b1189..000000000000 --- a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerBase.c +++ /dev/null @@ -1,35 +0,0 @@ -/** @file - - Copyright (c) 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 <Base.h> - -/** - - @param FaultAddress Address to find PE/COFF image for. - @param ImageBase Return load address of found image - @param PeCoffSizeOfHeaders Return the size of the PE/COFF header for the image that was found - - @retval NULL FaultAddress not in a loaded PE/COFF image. - @retval Path and file name of PE/COFF image. - -**/ -CHAR8 * -GetImageName ( - IN UINTN FaultAddress, - OUT UINTN *ImageBase, - OUT UINTN *PeCoffSizeOfHeaders - ) -{ - return NULL; -} diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf deleted file mode 100644 index b53a5e89f507..000000000000 --- a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf +++ /dev/null @@ -1,45 +0,0 @@ -#/** @file -# -# Copyright (c) 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. -# -# -#**/ - -[Defines] - INF_VERSION = 0x00010005 - BASE_NAME = DefaultExceptionHandlerBaseLib - FILE_GUID = 3d5261d5-5eb7-4559-98e7-475aa9d0dc42 - MODULE_TYPE = BASE - VERSION_STRING = 1.0 - LIBRARY_CLASS = DefaultExceptionHandlerLib - -[Sources.common] - DefaultExceptionHandlerBase.c - -[Sources.ARM] - Arm/DefaultExceptionHandler.c - -[Sources.AARCH64] - AArch64/DefaultExceptionHandler.c - -[Packages] - MdePkg/MdePkg.dec - ArmPkg/ArmPkg.dec - -[LibraryClasses] - BaseLib - PrintLib - DebugLib - PeCoffGetEntryPointLib - ArmDisassemblerLib - SerialPortLib - -[Guids] - gEfiDebugImageInfoTableGuid -- 2.17.1 ^ permalink raw reply related [flat|nested] 11+ messages in thread
* [PATCH v2 5/5] ArmPkg/DefaultExceptionHandlerLib: use console if available 2019-01-15 8:23 [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel ` (3 preceding siblings ...) 2019-01-15 8:23 ` [PATCH v2 4/5] ArmPkg/DefaultExceptionHandlerLib: drop BASE variant Ard Biesheuvel @ 2019-01-15 8:23 ` Ard Biesheuvel 2019-01-15 10:09 ` Laszlo Ersek 2019-01-16 20:36 ` [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel 5 siblings, 1 reply; 11+ messages in thread From: Ard Biesheuvel @ 2019-01-15 8:23 UTC (permalink / raw) To: edk2-devel; +Cc: leif.lindholm, lersek, Ard Biesheuvel Print the minimal 'exception occurred' message to the console instead of straight to the serial port if the console is available. This makes such messages visible on systems where the console is graphical and the serial is not connected. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> --- ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c | 12 ++++++++++-- ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c | 7 ++++++- ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf | 1 + 3 files changed, 17 insertions(+), 3 deletions(-) diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c index 1024bf48c63d..362acd5ba6d2 100644 --- a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c @@ -22,6 +22,7 @@ #include <Library/PrintLib.h> #include <Library/ArmDisassemblerLib.h> #include <Library/SerialPortLib.h> +#include <Library/UefiBootServicesTableLib.h> #include <Guid/DebugImageInfoTable.h> #include <Protocol/DebugSupport.h> @@ -159,14 +160,21 @@ DefaultExceptionHandler ( INT32 Offset; if (mRecursiveException) { - CharCount = AsciiSPrint (Buffer, sizeof (Buffer),"\nRecursive exception occurred while dumping the CPU state\n"); - SerialPortWrite ((UINT8 *) Buffer, CharCount); + STATIC CHAR8 CONST Message[] = "\nRecursive exception occurred while dumping the CPU state\n"; + + SerialPortWrite ((UINT8 *)Message, AsciiStrLen (Message)); + if (gST->ConOut != NULL) { + AsciiPrint (Message); + } CpuDeadLoop (); } mRecursiveException = TRUE; CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n\n%a Exception at 0x%016lx\n", gExceptionTypeString[ExceptionType], SystemContext.SystemContextAArch64->ELR); SerialPortWrite ((UINT8 *) Buffer, CharCount); + if (gST->ConOut != NULL) { + AsciiPrint (Buffer); + } DEBUG_CODE_BEGIN (); CHAR8 *Pdb, *PrevPdb; diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c b/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c index cc79cb2fa301..a79f73725aed 100644 --- a/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c @@ -21,6 +21,7 @@ #include <Library/PrintLib.h> #include <Library/ArmDisassemblerLib.h> #include <Library/SerialPortLib.h> +#include <Library/UefiBootServicesTableLib.h> #include <Guid/DebugImageInfoTable.h> @@ -194,7 +195,11 @@ DefaultExceptionHandler ( CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n%a Exception PC at 0x%08x CPSR 0x%08x ", gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR); - SerialPortWrite ((UINT8 *) Buffer, CharCount); + if (gST->ConOut != NULL) { + AsciiPrint (Buffer); + } else { + SerialPortWrite ((UINT8 *)Buffer, CharCount); + } DEBUG_CODE_BEGIN (); CHAR8 *Pdb; diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf index 7609f82d89a1..6bc48714c9dc 100644 --- a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf @@ -42,6 +42,7 @@ [LibraryClasses] PeCoffGetEntryPointLib ArmDisassemblerLib SerialPortLib + UefiBootServicesTableLib [Guids] gEfiDebugImageInfoTableGuid -- 2.17.1 ^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH v2 5/5] ArmPkg/DefaultExceptionHandlerLib: use console if available 2019-01-15 8:23 ` [PATCH v2 5/5] ArmPkg/DefaultExceptionHandlerLib: use console if available Ard Biesheuvel @ 2019-01-15 10:09 ` Laszlo Ersek 2019-01-15 11:14 ` Ard Biesheuvel 0 siblings, 1 reply; 11+ messages in thread From: Laszlo Ersek @ 2019-01-15 10:09 UTC (permalink / raw) To: Ard Biesheuvel, edk2-devel On 01/15/19 09:23, Ard Biesheuvel wrote: > Print the minimal 'exception occurred' message to the console instead > of straight to the serial port if the console is available. This makes > such messages visible on systems where the console is graphical and > the serial is not connected. > > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> > Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> > --- > ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c | 12 ++++++++++-- > ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c | 7 ++++++- > ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf | 1 + > 3 files changed, 17 insertions(+), 3 deletions(-) Please consider updating the following, before pushing the patch: > diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c > index 1024bf48c63d..362acd5ba6d2 100644 > --- a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c > +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c > @@ -22,6 +22,7 @@ > #include <Library/PrintLib.h> > #include <Library/ArmDisassemblerLib.h> > #include <Library/SerialPortLib.h> > +#include <Library/UefiBootServicesTableLib.h> > > #include <Guid/DebugImageInfoTable.h> > #include <Protocol/DebugSupport.h> > @@ -159,14 +160,21 @@ DefaultExceptionHandler ( > INT32 Offset; > > if (mRecursiveException) { > - CharCount = AsciiSPrint (Buffer, sizeof (Buffer),"\nRecursive exception occurred while dumping the CPU state\n"); > - SerialPortWrite ((UINT8 *) Buffer, CharCount); > + STATIC CHAR8 CONST Message[] = "\nRecursive exception occurred while dumping the CPU state\n"; > + > + SerialPortWrite ((UINT8 *)Message, AsciiStrLen (Message)); (1) A micro-optimization could be (sizeof Message - 1) rather than AsciiStrLen (Message), but it's mostly irrelevant. > + if (gST->ConOut != NULL) { > + AsciiPrint (Message); > + } > CpuDeadLoop (); > } > mRecursiveException = TRUE; > > CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n\n%a Exception at 0x%016lx\n", gExceptionTypeString[ExceptionType], SystemContext.SystemContextAArch64->ELR); > SerialPortWrite ((UINT8 *) Buffer, CharCount); > + if (gST->ConOut != NULL) { > + AsciiPrint (Buffer); > + } > > DEBUG_CODE_BEGIN (); > CHAR8 *Pdb, *PrevPdb; > diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c b/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c > index cc79cb2fa301..a79f73725aed 100644 > --- a/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c > +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c > @@ -21,6 +21,7 @@ > #include <Library/PrintLib.h> > #include <Library/ArmDisassemblerLib.h> > #include <Library/SerialPortLib.h> > +#include <Library/UefiBootServicesTableLib.h> > > #include <Guid/DebugImageInfoTable.h> > > @@ -194,7 +195,11 @@ DefaultExceptionHandler ( > > CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n%a Exception PC at 0x%08x CPSR 0x%08x ", > gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR); > - SerialPortWrite ((UINT8 *) Buffer, CharCount); > + if (gST->ConOut != NULL) { > + AsciiPrint (Buffer); > + } else { > + SerialPortWrite ((UINT8 *)Buffer, CharCount); > + } (2) I think the "serial PLUS console" reporting applies to the 32-bit lib instance as well, so I assume not updating this from v1 was an oversight. > > DEBUG_CODE_BEGIN (); > CHAR8 *Pdb; > diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf > index 7609f82d89a1..6bc48714c9dc 100644 > --- a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf > +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf > @@ -42,6 +42,7 @@ [LibraryClasses] > PeCoffGetEntryPointLib > ArmDisassemblerLib > SerialPortLib > + UefiBootServicesTableLib > > [Guids] > gEfiDebugImageInfoTableGuid > With (2) updated, and regardless of (1): Acked-by: Laszlo Ersek <lersek@redhat.com> Thanks! Laszlo ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 5/5] ArmPkg/DefaultExceptionHandlerLib: use console if available 2019-01-15 10:09 ` Laszlo Ersek @ 2019-01-15 11:14 ` Ard Biesheuvel 0 siblings, 0 replies; 11+ messages in thread From: Ard Biesheuvel @ 2019-01-15 11:14 UTC (permalink / raw) To: Laszlo Ersek; +Cc: edk2-devel@lists.01.org, Leif Lindholm On Tue, 15 Jan 2019 at 11:09, Laszlo Ersek <lersek@redhat.com> wrote: > > On 01/15/19 09:23, Ard Biesheuvel wrote: > > Print the minimal 'exception occurred' message to the console instead > > of straight to the serial port if the console is available. This makes > > such messages visible on systems where the console is graphical and > > the serial is not connected. > > > > Contributed-under: TianoCore Contribution Agreement 1.1 > > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> > > Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> > > --- > > ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c | 12 ++++++++++-- > > ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c | 7 ++++++- > > ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf | 1 + > > 3 files changed, 17 insertions(+), 3 deletions(-) > > Please consider updating the following, before pushing the patch: > > > diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c > > index 1024bf48c63d..362acd5ba6d2 100644 > > --- a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c > > +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c > > @@ -22,6 +22,7 @@ > > #include <Library/PrintLib.h> > > #include <Library/ArmDisassemblerLib.h> > > #include <Library/SerialPortLib.h> > > +#include <Library/UefiBootServicesTableLib.h> > > > > #include <Guid/DebugImageInfoTable.h> > > #include <Protocol/DebugSupport.h> > > @@ -159,14 +160,21 @@ DefaultExceptionHandler ( > > INT32 Offset; > > > > if (mRecursiveException) { > > - CharCount = AsciiSPrint (Buffer, sizeof (Buffer),"\nRecursive exception occurred while dumping the CPU state\n"); > > - SerialPortWrite ((UINT8 *) Buffer, CharCount); > > + STATIC CHAR8 CONST Message[] = "\nRecursive exception occurred while dumping the CPU state\n"; > > + > > + SerialPortWrite ((UINT8 *)Message, AsciiStrLen (Message)); > > (1) A micro-optimization could be (sizeof Message - 1) rather than > AsciiStrLen (Message), but it's mostly irrelevant. > OK > > + if (gST->ConOut != NULL) { > > + AsciiPrint (Message); > > + } > > CpuDeadLoop (); > > } > > mRecursiveException = TRUE; > > > > CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n\n%a Exception at 0x%016lx\n", gExceptionTypeString[ExceptionType], SystemContext.SystemContextAArch64->ELR); > > SerialPortWrite ((UINT8 *) Buffer, CharCount); > > + if (gST->ConOut != NULL) { > > + AsciiPrint (Buffer); > > + } > > > > DEBUG_CODE_BEGIN (); > > CHAR8 *Pdb, *PrevPdb; > > diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c b/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c > > index cc79cb2fa301..a79f73725aed 100644 > > --- a/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c > > +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/Arm/DefaultExceptionHandler.c > > @@ -21,6 +21,7 @@ > > #include <Library/PrintLib.h> > > #include <Library/ArmDisassemblerLib.h> > > #include <Library/SerialPortLib.h> > > +#include <Library/UefiBootServicesTableLib.h> > > > > #include <Guid/DebugImageInfoTable.h> > > > > @@ -194,7 +195,11 @@ DefaultExceptionHandler ( > > > > CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n%a Exception PC at 0x%08x CPSR 0x%08x ", > > gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR); > > - SerialPortWrite ((UINT8 *) Buffer, CharCount); > > + if (gST->ConOut != NULL) { > > + AsciiPrint (Buffer); > > + } else { > > + SerialPortWrite ((UINT8 *)Buffer, CharCount); > > + } > > (2) I think the "serial PLUS console" reporting applies to the 32-bit > lib instance as well, so I assume not updating this from v1 was an > oversight. > Yes it was. Thanks for spotting that. > > > > DEBUG_CODE_BEGIN (); > > CHAR8 *Pdb; > > diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf > > index 7609f82d89a1..6bc48714c9dc 100644 > > --- a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf > > +++ b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf > > @@ -42,6 +42,7 @@ [LibraryClasses] > > PeCoffGetEntryPointLib > > ArmDisassemblerLib > > SerialPortLib > > + UefiBootServicesTableLib > > > > [Guids] > > gEfiDebugImageInfoTableGuid > > > > With (2) updated, and regardless of (1): > > Acked-by: Laszlo Ersek <lersek@redhat.com> > > Thanks! > Laszlo ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message 2019-01-15 8:23 [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel ` (4 preceding siblings ...) 2019-01-15 8:23 ` [PATCH v2 5/5] ArmPkg/DefaultExceptionHandlerLib: use console if available Ard Biesheuvel @ 2019-01-16 20:36 ` Ard Biesheuvel 2019-01-17 11:07 ` Laszlo Ersek 5 siblings, 1 reply; 11+ messages in thread From: Ard Biesheuvel @ 2019-01-16 20:36 UTC (permalink / raw) To: edk2-devel@lists.01.org; +Cc: Leif Lindholm, Laszlo Ersek On Tue, 15 Jan 2019 at 09:23, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote: > > When running with a graphical console, no message whatsoever is printed > when the systems hits an unexpected exception and hangs, because even > the minimal 'exception occurred' message is only sent to the serial port. > > So let's fix that, by updating DefaultExceptionHandlerLib to take the > availability of a console into account. (#5) > > This requires some preparatory decruftication so that we can safely refer > to the system table and console (#1 .. #4). > > Changes since v1: > - split off ArmVirtPkg patch (#3) > - always send minimal error message to the serial port before attempting to > send it to console->stdout as well (which is more likely to fail) (#5) > - add Leif's R-b to the series > > Ard Biesheuvel (5): > ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling > ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context > ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase > ArmPkg/DefaultExceptionHandlerLib: drop BASE variant > ArmPkg/DefaultExceptionHandlerLib: use console if available > Series pushed as 47d977733137 ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling 74a12eae9f2c ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context ef9f0bff477f ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase 1e32c49718c6 ArmPkg/DefaultExceptionHandlerLib: drop BASE variant 31f5388006fc ArmPkg/DefaultExceptionHandlerLib: use console if available after applying the changes suggested by Laszlo. I failed to include Laszlo's R-b in 3/5, apologies for that. ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message 2019-01-16 20:36 ` [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel @ 2019-01-17 11:07 ` Laszlo Ersek 0 siblings, 0 replies; 11+ messages in thread From: Laszlo Ersek @ 2019-01-17 11:07 UTC (permalink / raw) To: Ard Biesheuvel, edk2-devel@lists.01.org On 01/16/19 21:36, Ard Biesheuvel wrote: > On Tue, 15 Jan 2019 at 09:23, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote: >> >> When running with a graphical console, no message whatsoever is printed >> when the systems hits an unexpected exception and hangs, because even >> the minimal 'exception occurred' message is only sent to the serial port. >> >> So let's fix that, by updating DefaultExceptionHandlerLib to take the >> availability of a console into account. (#5) >> >> This requires some preparatory decruftication so that we can safely refer >> to the system table and console (#1 .. #4). >> >> Changes since v1: >> - split off ArmVirtPkg patch (#3) >> - always send minimal error message to the serial port before attempting to >> send it to console->stdout as well (which is more likely to fail) (#5) >> - add Leif's R-b to the series >> >> Ard Biesheuvel (5): >> ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling >> ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context >> ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase >> ArmPkg/DefaultExceptionHandlerLib: drop BASE variant >> ArmPkg/DefaultExceptionHandlerLib: use console if available >> > > Series pushed as > > 47d977733137 ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling > 74a12eae9f2c ArmPkg/DefaultExceptionHandlerLib: declare the permitted > usage context > ef9f0bff477f ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase > 1e32c49718c6 ArmPkg/DefaultExceptionHandlerLib: drop BASE variant > 31f5388006fc ArmPkg/DefaultExceptionHandlerLib: use console if available > > after applying the changes suggested by Laszlo. I failed to include > Laszlo's R-b in 3/5, apologies for that. > That's not a problem, Laszlo ^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2019-01-17 11:07 UTC | newest] Thread overview: 11+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2019-01-15 8:23 [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 1/5] ArmPkg/DebugAgentSymbolsBaseLib: remove exception handling Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 2/5] ArmPkg/DefaultExceptionHandlerLib: declare the permitted usage context Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 3/5] ArmVirtPkg: drop reference to ArmPkg/DefaultExceptionHandlerLibBase Ard Biesheuvel 2019-01-15 10:12 ` Laszlo Ersek 2019-01-15 8:23 ` [PATCH v2 4/5] ArmPkg/DefaultExceptionHandlerLib: drop BASE variant Ard Biesheuvel 2019-01-15 8:23 ` [PATCH v2 5/5] ArmPkg/DefaultExceptionHandlerLib: use console if available Ard Biesheuvel 2019-01-15 10:09 ` Laszlo Ersek 2019-01-15 11:14 ` Ard Biesheuvel 2019-01-16 20:36 ` [PATCH v2 0/5] ArmPkg: use console for minimal 'exception occurred' message Ard Biesheuvel 2019-01-17 11:07 ` Laszlo Ersek
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