[PATCH v2 0/2] sframe: Disable by default and support SFRAME_F_FDE_FUNC_START_PCREL

[Adhemerval Zanella Netto]

Andreas,

Would it be ok for 2.43? There is only only small issues Indu has found
that I fixed locally.

On 21/07/25 20:41, Adhemerval Zanella wrote:
> The SFrame prior binutils 2.45 is unstable on multiple architectures,
> so upcoming binutils 2.45 should be considered the minimum required
> version for SFrame backtracing. This version also includes an erratum,
> SFRAME_F_FDE_FUNC_START_PCREL, which is not currently supported on
> glibc. SFrame with this flag is currently ignored by glibc SFrame
> handling.
> 
> Due to the experimental nature, the first patch disables SFrame by
> default, adds extra checks to enable iff the architecture's explicit
> enablement is on glibc, and fixes some other build issues.
> 
> The second patch adds support for the SFRAME_F_FDE_FUNC_START_PCREL
> erratum, which adds SFrame support for binaries built with binutils
> 2.45.
> 
> Adhemerval Zanella (1):
>   Disable SFrame support by default
> 
> Claudiu Zissulescu (1):
>   sframe: Add support for SFRAME_F_FDE_FUNC_START_PCREL flag
> 
>  INSTALL                                     |   9 +-
>  aclocal.m4                                  |   4 +
>  config.h.in                                 |   3 +
>  config.make.in                              |   2 +-
>  configure                                   |  62 ++++++----
>  configure.ac                                |  26 ++--
>  debug/Makefile                              |  16 ++-
>  debug/backtrace.c                           |   8 ++
>  {sysdeps/pthread => debug}/tst-backtrace1.c |   0
>  elf/dl-find_object.h                        |  10 ++
>  manual/install.texi                         |  11 +-
>  sysdeps/aarch64/configure                   |   2 +
>  sysdeps/aarch64/configure.ac                |   2 +
>  sysdeps/generic/Makefile                    |   2 +
>  sysdeps/generic/sframe-read.c               | 128 +++++++++++++++-----
>  sysdeps/generic/sframe-read.h               |   6 +
>  sysdeps/generic/sframe.h                    |  15 ++-
>  sysdeps/pthread/Makefile                    |   1 -
>  sysdeps/x86_64/configure                    |   2 +
>  sysdeps/x86_64/configure.ac                 |   2 +
>  20 files changed, 226 insertions(+), 85 deletions(-)
>  rename {sysdeps/pthread => debug}/tst-backtrace1.c (100%)
>