The commit c2419fc006 introduced a change
to the CMake toolchain detection routine in which it attempts to use
the distro-provided `gdb-multiarch` GDB executable when the target-
specific GDB executable cannot be found (i.e. fallback to
`gdb-multiarch`).
This can cause many problems for the Zephyr users because the distro-
provided GDB does not contain any Zephyr-specific patches and it may
misbehave under various conditions (e.g. negative tid/pid being
displayed, Xtensa debugging mysteriously failing, ARC debugging not
working).
This commit removes the fallback mechanism to the distro-provided
`gdb-multiarch` because it is better to display an error message saying
GDB is not found than to use a wrong GDB that can give out very
confusing and misleading error messages to users.
Moreover, this fallback mechanism is no longer necessary because the
Zephyr SDK is now available on all major host operating systems and it
provides the target-specific custom GDB that contains all Zephyr-
specific patches.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
The Zephyr SDK 0.15.0 release has changed the default GDB executable to
be Python-less and introduced an alternate Python-capable variant
called `gdb-py` (note that the Zephyr SDK previously provided
`gdb-no-py` instead).
This commit updates the CMake toolchain detection routine to attempt
using the Python-capable GDB variant (gdb-py) first and, if it is not
available or fails to launch due to a missing libpython dependency,
use the Python-less GDB variant (gdb).
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
The GDB check routine added in the PR #38749 does not suppress the
console outputs (stdout and stderr) and may print out a misleading
error message during a CMake configuration when the required version
of Python is not available on the system:
arm-zephyr-eabi-gdb: error while loading shared libraries:
libpython3.8.so.1.0: cannot open shared object file: No such file or
directory
This commit adds the `OUTPUT_QUIET` and `ERROR_QUIET` options when
executing the GDB process so that the console outputs during the GDB
executable validation are not displayed to the user.
In addition, this commit removes the unused `GDB_PY_NO_PY` standard
output redirection variable since it is unnecessary.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
GDB can be built with or without Python support. When built with Python
support this can cause a particular problem: The gdb executable relies
on shared libraries that are bound to a specific Python version. But
since most Linux distributions typically ship with a single version, it
is very difficult to choose which one to target when building GDB.
When GDB executes, if it fails to load the shared libraries it will exit
immediately with an error code of 127 and output resembling this:
/home/carles/bin/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gdb:
error while loading shared libraries: libpython3.8.so.1.0: cannot open
shared object file: No such file or directory
There are two known approaches to shipping multiple gdb executables:
- The Zephyr SDK ships a default gdb with Python enabled, and then a
separate gdb-no-py executable with Python disabled
- GNU Arm Embedded ships with a default gdb with Python disabled, and an
additional gdb-py with Python enabled
To mitigate the problem of not being able to debug, fall back to a
'gdb-no-py' if it exists whenever the standard gdb executable fails to
even run.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
GNU/bintools abstraction completed.
The following commands and flags are now available in bintools:
- memusage
- elfconvert
- dissassembly
- readelf
- strip
The bintools template has now been updated with more description which
will be useful when adding support for more toolchains in future.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
This abstracts the interface for generation of the strip command
line, by naming the desired actions instead of directly setting the
command parameters, which then opens up for other binary tool sets
which may require different arguments to achieve the desired result.
The intent here is to abstract Zephyr's dependence on toolchains,
thus allowing for easier porting to other, perhaps commercial,
toolchains and/or usecases.
No functional change expected.
Signed-off-by: Danny Oerndrup <daor@demant.com>
This abstracts the interface for generation of the readelf command
line, by naming the desired actions instead of directly setting the
command parameters, which then opens up for other binary tool sets
which may require different arguments to achieve the desired result.
The intent here is to abstract Zephyr's dependence on toolchains,
thus allowing for easier porting to other, perhaps commercial,
toolchains and/or usecases.
No functional change expected.
Signed-off-by: Danny Oerndrup <daor@demant.com>
This abstracts the interface for generation of the objdump command
line, by naming the desired actions instead of directly setting the
command parameters, which then opens up for other binary tool sets
which may require different arguments to achieve the desired result.
The intent here is to abstract Zephyr's dependence on toolchains,
thus allowing for easier porting to other, perhaps commercial,
toolchains and/or usecases.
No functional change expected.
Signed-off-by: Danny Oerndrup <daor@demant.com>
This abstracts the interface for generation of the objcopy command
line, by naming the desired actions instead of directly setting the
command parameters, which then opens up for other binary tool sets
which may require different arguments to achieve the desired result.
The intent here is to abstract Zephyr's dependence on toolchains,
thus allowing for easier porting to other, perhaps commercial,
toolchains and/or usecases.
No functional change expected.
Signed-off-by: Danny Oerndrup <daor@demant.com>
The method for getting a memory usage report printed during build, is
based on a GNU linker (ld) option flag, and thus is not necessarily
supported by other toolchain binary tools.
The introduced cmake macro allows for a given toolchain to specify how
the memory usage report is to be generated, and whether the command for
generation, if any, is to be added to the post_build_commands and the
post_build_byproducts lists of the top level CMakeLists.txt
The intent here is to abstract Zephyr's dependence on toolchains,
thus allowing for easier porting to other, perhaps commercial,
toolchains and/or usecases.
No functional change expected.
Signed-off-by: Danny Oerndrup <daor@demant.com>
This forms the foundation for the abstraction of the binary tools,
where the following steps are taken:
- Move binary tool resolving, such as objcopy, objdump, readelf and
so forth, out of compiler definitions and place in a dedicated binary
tools folder with the binary tools supplier as subfolder, similar to
the compiler and linker directories.
- Create binary tool sets, gnu, host-gnu and llvm.
- Each toolchain selects the required set of binary tools by setting
BINTOOLS via its generic.cmake as it also does for compiler and linker.
The intent here is to abstract Zephyr's dependence on toolchains,
thus allowing for easier porting to other, perhaps commercial,
toolchains and/or usecases.
No functional change expected.
Signed-off-by: Danny Oerndrup <daor@demant.com>
