[RFC v4 0/6] Stack trace support in X64 exception handling

[Paulo Alcantara <paulo@paulo.ac>]

Hi,

This series adds stack trace support during IA32 and X64 CPU exceptions.

Informations like back trace, stack contents and image module names
(that were part of the call stack) will be dumped out.

The current limitation is that it relies on available frame pointers
(GCC only) in order to successfully unwind the stack.

(Sorry for the very long delay - I was very busy working on something
 else and then went to vacations)

Jiewen,

I have tested it with VS2015x86 and the stack trace just hanged when
printing out the first EIP (that is, no frame pointer at all).

Thanks!
Paulo

Repo:   https://github.com/pcacjr/edk2.git
Branch: stacktrace_v4

Cc: Rick Bramley <richard.bramley@hp.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Brian Johnson <brian.johnson@hpe.com>
Cc: Jeff Fan <vanjeff_919@hotmail.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Paulo Alcantara <paulo@paulo.ac>
---

v1 -> v2:
  * Add IA32 arch support (GCC toolchain only)
  * Replace hard-coded stack alignment value (16) with
    CPU_STACK_ALIGNMENT.
  * Check for proper stack and frame pointer alignments.
  * Fix initialization of UnwoundStacksCount to 1.
  * Move GetPdbFileName() to common code since it will be used by both
    IA32 and X64 implementations.

v2 -> v3:
  * Fixed wrong assumption about "RIP < ImageBase" to start searching
    for another PE/COFF image. That is, RIP may point to lower and
    higher addresses for any other PE/COFF images. Both IA32 & X64.
    (Thanks Andrew & Jiewen)
  * Fixed typo: unwond -> unwound. Both IA32 & X64. (Thanks Brian)

v3 -> v4:
  * Validate all frame/stack pointer addresses before dereferencing them
    as requested by Brian & Jiewen.
  * Correctly print out IP addresses during the stack traces (by Jeff)

Paulo Alcantara (6):
  UefiCpuPkg/CpuExceptionHandlerLib/X64: Add stack trace support
  UefiCpuPkg/CpuExceptionHandlerLib: Export GetPdbFileName()
  UefiCpuPkg/CpuExceptionHandlerLib/Ia32: Add stack trace support
  UefiCpuPkg/CpuExceptionHandlerLib: Add helper to valid memory
    addresses
  UefiCpuPkg/CpuExceptionHandlerLib: Ensure valid frame/stack pointers
  UefiCpuPkg/CpuExceptionHandlerLib: Correctly print IP addresses

 UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c        | 484 ++++++++++++++++++--
 UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h        |  41 +-
 UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ArchExceptionHandler.c | 445 +++++++++++++++++-
 UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchExceptionHandler.c  | 384 +++++++++++++++-
 4 files changed, 1296 insertions(+), 58 deletions(-)

-- 
2.14.3