[PATCH 0/7] Reliable CPU compatibility diagnostics in ld.so
Florian Weimer
fweimer@redhat.com
Fri Jan 14 12:40:02 GMT 2022
This series enables reliable CPU compatibility diagnostics by building
the early parts of the dynamic loader with an older ISA level than the
rest of glibc.
I tested this with our POWER9 build flags (running on POWER8), and with
-march=x86-64-v4 on a x86-64-v3 system. In both cases, an accurate
erorr is printed. Also built with build-many-glibcs.py, and tested on
i686-linux-gnu and x86_64-linux-gnu,.
Florian Weimer (7):
x86: HAVE_X86_LAHF_SAHF, HAVE_X86_MOVBE and -march=x86-64-vN (bug
28782)
Generate gcc-macros.h
elf: Split dl-printf.c from dl-misc.c
Add --early-cflags configure option
powerpc64le: Use <gcc-macros.h> in early HWCAP check
x86: Add x86-64-vN check to early startup
s390x: Use <gcc-macros.h> in early HWCAP check
Makeconfig | 9 +
config.make.in | 1 +
configure | 13 +
configure.ac | 6 +
elf/Makefile | 10 +-
elf/dl-misc.c | 281 +----------------
elf/dl-printf.c | 292 ++++++++++++++++++
manual/install.texi | 7 +
sysdeps/powerpc/powerpc64/le/dl-hwcap-check.h | 9 +-
sysdeps/s390/s390-64/dl-hwcap-check.h | 5 +-
sysdeps/x86/Makefile | 1 +
sysdeps/x86/configure | 4 +-
sysdeps/x86/configure.ac | 4 +-
sysdeps/x86/dl-get-cpu-features.c | 31 +-
14 files changed, 384 insertions(+), 289 deletions(-)
create mode 100644 elf/dl-printf.c
base-commit: 4997a533ae4b51ef66a6b68862b7578a7acb82df
--
2.34.1
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