[PATCH 0/9] Add new command to print the shadow stack backtrace

[Christina Schimpe <christina.schimpe@intel.com>]

Hi all,

as already indicated in the discussion
https://sourceware.org/pipermail/gdb/2023-December/051024.html
I'd like to add a command to print the shadow stack backtrace.

In the discussion above the main conclusion was to use the ordinary
backtrace command with a new flag: "bt -shadow".
I chose a similar direction, but decided against the flag "-shadow"
in favor of a new subcommand of the ordinary backtrace command:
"bt shadow".

This is an example shadow stack backtrace on amd64:
~~~
(gdb) bt shadow
#0  0x000000000040111f in call1 at amd64-shadow-stack.c:14
#1  0x000000000040112f in main at amd64-shadow-stack.c:21
#2  0x00007ffff7c3fe70 in __libc_start_call_main at ../sysdeps/nptl/libc_start_call_main.h:58
#3  0x00007ffff7c3ff20 in __libc_start_main_impl at ../csu/libc-start.c:128
#4  0x0000000000401045 in _start
~~~

I am happy about your feedback!

Christina


Christina Schimpe (9):
  gdb: Generalize handling of the shadow stack pointer.
  gdb: Refactor 'stack.c:print_frame'.
  gdb: Introduce 'stack.c:print_pc' function without frame argument.
  gdb: Refactor 'find_symbol_funname' and 'info_frame_command_core' in
    stack.c.
  gdb: Refactor 'stack.c:print_frame_info'.
  gdb: Implement 'bt shadow' to print the shadow stack backtrace.
  gdb: Provide gdbarch hook to distinguish shadow stack backtrace
    elements.
  gdb: Implement the hook 'is_no_return_shadow_stack_address' for amd64
    linux.
  gdb, mi: Add -shadow-stack-list-frames command

 gdb/Makefile.in                               |   2 +
 gdb/NEWS                                      |  17 +
 gdb/aarch64-linux-tdep.c                      |  51 +-
 gdb/aarch64-tdep.c                            |  42 +-
 gdb/amd64-linux-tdep.c                        | 164 ++---
 gdb/amd64-tdep.c                              |  20 +
 gdb/annotate.c                                |  93 ++-
 gdb/annotate.h                                |  18 +-
 gdb/doc/gdb.texinfo                           | 114 +++
 gdb/gdbarch-gen.c                             | 158 ++++-
 gdb/gdbarch-gen.h                             |  80 ++-
 gdb/gdbarch.h                                 |   1 +
 gdb/gdbarch_components.py                     | 100 ++-
 gdb/infcall.c                                 |   4 +-
 gdb/linux-tdep.c                              |   2 +
 gdb/mi/mi-cmd-stack.c                         | 146 ++++
 gdb/mi/mi-cmds.c                              |   2 +
 gdb/mi/mi-cmds.h                              |   1 +
 gdb/shadow-stack.c                            | 662 ++++++++++++++++++
 gdb/shadow-stack.h                            | 106 +++
 gdb/stack.c                                   | 382 ++++++----
 gdb/stack.h                                   |  55 ++
 .../amd64-shadow-stack-backtrace-signal.exp   |  54 ++
 .../gdb.arch/amd64-shadow-stack-cmds.exp      |  88 +++
 .../gdb.arch/amd64-shadow-stack-signal.c      |  31 +
 gdb/testsuite/gdb.base/help.exp               |   6 +-
 gdb/testsuite/gdb.base/options.exp            |   7 +-
 .../gdb.mi/mi-shadow-stack-signal.exp         |  69 ++
 gdb/testsuite/gdb.mi/mi-shadow-stack.exp      |  65 ++
 29 files changed, 2105 insertions(+), 435 deletions(-)
 create mode 100644 gdb/shadow-stack.c
 create mode 100644 gdb/shadow-stack.h
 create mode 100644 gdb/testsuite/gdb.arch/amd64-shadow-stack-backtrace-signal.exp
 create mode 100644 gdb/testsuite/gdb.arch/amd64-shadow-stack-signal.c
 create mode 100644 gdb/testsuite/gdb.mi/mi-shadow-stack-signal.exp
 create mode 100644 gdb/testsuite/gdb.mi/mi-shadow-stack.exp

-- 
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