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Luis Machado 5add3fce49 sme: Fixup sigframe gdbarch when vg/svg changes
With SME, where you have two different vector lengths (vl and svl), it may be
the case that the current frame has a set of vector lengths (A) but the signal
context has a distinct set of vector lengths (B).

In this case, we may run into a situation where GDB attempts to use a gdbarch
created for set A, but it is really dealing with a frame that was using set
B.

This is problematic, specially with SME, because now we have a different
number of pseudo-registers and types that gets cached on creation of each
gdbarch variation.

For AArch64 we really need to be able to use the correct gdbarch for each
frame, and I noticed the signal frame (tramp-frame) doesn't have a settable
prev_arch field.  So it ends up using the default frame_unwind_arch function
and eventually calling get_frame_arch (next_frame).  That means the previous
frame will always have the same gdbarch as the current frame.

This patch first refactors the AArch64/Linux signal context code, simplifying
it and making it reusable for our purposes of calculating the previous frame's
gdbarch.

I introduced a struct that holds information that we have found in the signal
context, and with which we can make various decisions.

Finally, a small change to tramp-frame.c and tramp-frame.h to expose a
prev_arch hook that the architecture can set.

With this new field, AArch64/Linux can implement a hook that looks at the
signal context and infers the gdbarch for the previous frame.

Regression-tested on aarch64-linux Ubuntu 22.04/20.04.

Approved-By: Simon Marchi <simon.marchi@efficios.com>
Reviewed-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
2023-10-04 16:23:40 +01:00
bfd Automatic date update in version.in 2023-10-04 00:00:32 +00:00
binutils MIPS: Fix `readelf -S bintest' test for n64 targets 2023-10-03 12:41:02 +01:00
config config/debuginfod.m4: Add check for libdebuginfod 0.188 2023-09-27 15:11:13 -04:00
contrib
cpu sim --enable-cgen-maint 2023-08-19 12:41:32 +09:30
elfcpp Add markers for the 2.41 branch 2023-07-03 11:12:15 +01:00
etc
gas Fix memory leak in RiscV assembler. 2023-10-02 16:23:14 +01:00
gdb sme: Fixup sigframe gdbarch when vg/svg changes 2023-10-04 16:23:40 +01:00
gdbserver sme: Add support for SME 2023-10-04 16:23:40 +01:00
gdbsupport Remove explanatory comments from includes 2023-09-20 11:45:16 -06:00
gnulib Add missing backslash to update-gnulib.sh 2023-06-21 08:47:05 -06:00
gold gold: Use char16_t, char32_t instead of uint16_t, uint32_t as character types 2023-09-06 17:20:20 -07:00
gprof regen config 2023-08-12 10:27:57 +09:30
gprofng gprofng: 30834 improve disassembly output for call and branch instructions 2023-09-21 18:56:30 -07:00
include aarch64: system register aliasing detection 2023-10-04 12:21:53 +01:00
intl regen config 2023-08-12 10:27:57 +09:30
ld Use bfd_get_current_time in places where it is suitable 2023-10-02 13:24:05 +01:00
libbacktrace regen config 2023-08-12 10:27:57 +09:30
libctf regen config 2023-08-12 10:27:57 +09:30
libdecnumber regen config 2023-08-12 10:27:57 +09:30
libiberty Synchromize libiberty sources with master version in gcc repository 2023-06-26 15:47:15 +01:00
libsframe regen config 2023-08-12 10:27:57 +09:30
opcodes aarch64: Refactor system register data 2023-10-04 12:21:53 +01:00
readline
sim Simplify definition of GUILE 2023-08-26 13:09:38 -06:00
texinfo
zlib regen config 2023-08-12 10:27:57 +09:30
.cvsignore
.editorconfig
.gitattributes
.gitignore
ar-lib
ChangeLog Revert "2.41 Release sources" 2023-08-02 12:06:23 +01:00
compile
config-ml.in MSP430: Add -fno-exceptions multilib 2023-08-12 10:24:26 +09:30
config.guess kvx: New port. 2023-08-16 14:22:54 +01:00
config.rpath
config.sub kvx: New port. 2023-08-16 14:22:54 +01:00
configure generated bfd files, and kvx regen 2023-08-17 21:44:04 +09:30
configure.ac kvx: New port. 2023-08-16 14:22:54 +01:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4 FDPIC: Handle arm*-*-uclinuxfdpiceabi in configure scripts 2023-08-12 10:25:06 +09:30
lt~obsolete.m4
ltgcc.m4
ltmain.sh Do not use HAVE_DOS_BASED_FILE_SYSTEM for Cygwin. 2023-08-12 10:25:06 +09:30
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def gccrs: Add gcc-check-target check-rust 2023-08-12 10:25:06 +09:30
Makefile.in regen config 2023-08-12 10:27:57 +09:30
Makefile.tpl toplevel: Substitute GDCFLAGS instead of using CFLAGS 2023-08-12 10:27:44 +09:30
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README
README-maintainer-mode
SECURITY.txt
setup.com
src-release.sh src-release.sh (SIM_SUPPORT_DIRS): Add libsframe, libctf/swap.h and gnulib 2023-09-06 04:15:23 +02:00
symlink-tree
test-driver
ylwrap

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
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