The device_error function always ends up calling the error function,
which is itself marked as ATTRIBUTE_NORETURN, so it makes sense that
device_error should also be marked ATTRIBUTE_NORETURN.
Doing this resolves a few warnings from hw_ide.c about possibly
uninitialized variables - the variables are only uninitialized after
passing through a call to device_error, which obviously means the
variables are never really used uninitialized, the simulation will
terminate with the device_error call.
This commit is a follow on to:
commit 182421c9d2
Date: Tue Oct 11 15:02:08 2022 +0100
sim/ppc: fixes for arguments to printf style functions
where commit 182421c9d2 addressed issues with printf format
arguments that were causing the compiler to give an error, this commit
addresses issues that caused the compiler to emit a warning.
This commit is mostly either changing the format string to match the
argument, or in some cases, excess, unused arguments are removed.
Because "%p" is the pointer conversion specifier to print a pointer in an
implementation-defined manner, the result with format string containing
"0x%p" can be strange. For instance, core_map_find_mapping prints error
containing "0x0x...." (processor is not NULL) or "0x(null)" (processor is
NULL) on glibc.
This commit replaces "0x%p" with "%p" to prevent unpredictable behavior.
After the recent series of fixes to mark more functions in the
simulator with ATTRIBUTE_PRINTF, there were some build failures in the
ppc sim due, in some cases, to bugs with the arguments being passed,
and in other cases, the issues were (maybe) less serious, with
arguments being the wrong size, or type, for the printf format being
used.
This commit fixes all of the issues that I ran into.
In each case I selected the easiest solution to the problem, which is
usually just casting the argument to the correct type. If anyone
later on thinks the print format should change, please feel free to do
that. What we have here should keep the simulator basically working
as it does currently, which is my goal with this commit.
Clang generates a warning if there is a redundant self-assignment
("-Wself-assign"). On the default configuration, it causes a build failure
(unless "--disable-werror" is specified).
This commit removes redundant self-assignments from two files.
Clang generates a warning if the format string of a printf-like function is
not a literal ("-Wformat-nonliteral"). On the default configuration, it
causes a build failure (unless "--disable-werror" is specified).
To avoid warnings on the printf-like wrapper, it requires proper
__attribute__((format)) and we have ATTRIBUTE_PRINTF macro for this reason.
This commit adds ATTRIBUTE_PRINTF to the printf-like functions.
For the error function defined in sim_calls.c, the ATTRIBUTE_NORETURN
has been moved to the function declaration.
PTR will soon disappear from ansidecl.h. Remove uses in sim. Where
a PTR cast is used in assignment or function args to a void* I've
simply removed the unnecessary (in C) cast rather than replacing with
(void *).
These are almost entirely unused. For the very few places using them,
replace with explicit signed types. This matches what was done in the
common sim code.
This commit brings all the changes made by running gdb/copyright.py
as per GDB's Start of New Year Procedure.
For the avoidance of doubt, all changes in this commits were
performed by the script.
The ## marker tells automake to not include the comment in its
generated output, so use that in most places where the comment
only makes sense in the inputs.
Like we just did for pulling out the errno map, pull out the syscall
maps into a dedicated common file. Most newlib ports are using the
same syscall map, but not all, which means we have to do a bit more
work to migrate.
This commit adds the maps and switches the ports using the common
default syscall table over to it. Ports using unique syscall tables
are still using the old targ-map.c logic.
Switching common ports over is easy by checking NL_TARGET, but the
ppc code needs a bit more cleanup here hence its larger diff.
The project has been using GPL v3 for a while now in the source files,
and the arm & ppc ports have carried a copy of the COPYING file. Lets
move those up to the top sim dir like other projects to make it clear.
Also drop the ppc/COPYING.LIB as it's not really referenced by any
source as everything is GPL v3.
We don't need to build this anymore ourselves since the common build
includes it and produces the same object code. We also need to pull
in the split constant modules after the refactoring and pulling them
out of nltvals.def & targ-map.o. This doesn't matter for the sim
directly, but does for gdb and other users of libsim.
We also delete some conditional source tree logic since we already
require this be the "new" combined tree with a ../common/ dir. This
has been the case for decades at this point.
There's no need to define these ourselves anymore, so switch to the
stdint.h types. This will be important when we start using PRI*
defines with printf formats.
...by reordering includes.
1. sim-utils.c
sim/mips/sim-main.h defines UserMode, while there is a struct in winnt.h
which has UserMode as a member. So if sim-main.h is included before winnt.h,
compilation fails.
2. ppc
registers.h defines CR, which is used as a member in winnt.h.
winsock2.h is included by sys/time.h, so sys/time.h has to be included
before registers.h.
Bug: https://sourceware.org/PR28476
Not all systems have easy access to hard links or symlinks, so add
fallback logic to the run->psim build code to handle those.
Bug: https://sourceware.org/PR18864
Only the ppc arch supports this kind of source file override logic.
All the others expose knobs via configure flags, and for some of
these, the ppc code does as well. For others, it doesn't make sense
to ever change them. Since it's unlikely anyone is using this, drop
it all to simplify the code (and to get us a little closer to the
common sim code).
We use these older names inconsistently in the sim codebase, and time
has moved on long ago, so drop support for these non-standard names.
POSIX provides O_NONBLOCK for us, so use it everywhere.
Now that the ppc code has been cleaned up enough to use the same set
of warning flags as the common code, delete the ppc-specific configure
logic so we can leverage what the common code already defined for us.
When compiling with --enable-werror and CFLAGS="-O0 -g -Wall", we run into:
...
src/sim/ppc/hw_memory.c: In function 'hw_memory_init_address':
src/sim/ppc/hw_memory.c:204:7: error: pointer targets in passing argument 4 \
of 'device_find_integer_array_property' differ in signedness \
[-Werror=pointer-sign]
&new_chunk->size);
^
...
Fix these by adding an explicit pointer cast. It's a bit ugly to use APIs
based on signed integers to read out unsigned values, but in practice, this
is par for the course in the ppc code.
We already use signed APIs and assign the result to unsigned values a lot:
see how device_find_integer_property returns a signed integer (cell), but
then assign it to unsigned types. The array APIs are not used that often
which is why we don't see many warnings, and we disable warnings when we
assign signed integers to unsigned integers in general.
The dtc/libfdt project (which is the standard in other projects) processes
the fdt blob as a series of bytes without any type information. Typing is
left to the caller. They have core APIs that read/write bytes, and a few
helper functions to cast/convert those bytes to the right value (e.g. u32).
In this ppc sim code, the core APIs use signed integers, and the callers
convert to unsigned, usually implicitly.
We could add some core APIs to the ppc sim that deal with raw bytes and then
add some helpers to convert to the right type, but that seems like a lot of
lifting for what boils down to a cast, and is effectively equivalent to all
the implicit assignments we use elsewhere. Long term, a lot of the ppc code
should either get converted to existing sim common code, or we should stand
up proper APIs in the common code first, or use standard libraries to do all
the processing (e.g. libfdt). Either way, this device.c code would all get
deleted, and callers (like these hw_*.c files) would get converted. Which
is also why we go with a cast rather new (but largely unused) APIs.
This aligns with common code which already uses this flag. We have
to add another local prototype to fix the failure, and add another
local decl for the SIM_DESC type. Unwinding these will require a
lot more work & conversions in the process, so going with the decl
for now unblocks the warning unification.
This copies logic used in the common sim warning configure code to fix
build errors for mingw targets. Turning format warnings on triggers
a failure in the debug.c file, so apply a minor fix at the same time.
This file is compiled for the --host & --build system which leads to
including the configure generated config.h in both environments.
This obviously doesn't work when the two targets don't look alike at
all and can cause build failures here (e.g. a mingw host & a linux
build). Since we don't actually need any config settings in this
very simple file, drop the includes entirely.
Now that ChangeLog entries are no longer used for sim patches,
this commit renames all relevant sim ChangeLog to ChangeLog-2021,
similar to what we would do in the context of the "Start of New
Year" procedure.
The purpose of this change is to avoid people merging ChangeLog
entries by mistake when applying existing commits that they are
currently working on.
Also throw in a .gitignore entry to keep people from adding new
ChangeLog files anywhere in the sim tree.
These are copied from sim/common/Make-common.in.
On ppc the build fails without at least the 'info' target, e.g.:
Making info in ppc
make[4]: Entering directory '/<<BUILDDIR>>/gdb-10.2.2974.g5b45e89f56d+21.10.20210510155809/build/default/sim/ppc'
make[4]: *** No rule to make target 'info'. Stop.
Move these options up to the common dir so we only test & export
them once across all ports.
The setting only affects igen based ports, and they were turning
this on by default, so keep the default in place.
Copy most of the common build warning logic over from the common
code to help keep code behavior a bit consistent, and turn them
on by default. We disable a few flags for now until we can clean
the code up.
Use the same basic names as the common sim inline logic so we can
merge the two. We don't do that here, just prepare for it.
The common code seems to be based on the ppc version but with slightly
different names as it was cleaned up & generalized. I *think* these
concepts are the same, so binding them together is OK, but maybe I'm
misreading them. If so, can always tweak them later.
REVEAL_MODULE -> H_REVEALS_MODULE
INLINE_MODULE -> C_REVEALS_MODULE
Move these options up to the common dir so we only test & export
them once across all ports. It also enables -Werror usage on the
common files we've been pulling out of arch subdirs.
As we merge settings from subdirs into the common configure, we
sometimes need to keep the settings working in both dirs. Create
a makefile fragment to pass them down so we don't have to run the
checks twice. For now, the file is empty, but we'll start moving
logic in shortly.
