Some third-party components include this file without really needing
any symbols from it. Presence of this file allows to build them
against minimal libc, whereas previously they forced Newlib.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Placing it at sys/fcntl.h was due to mimicking internal newlib's
layout, but what we need is this file at the standard location,
for reuse.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Under GNU C, sizeof(void) = 1. This commit merely makes it explicit u8.
Pointer arithmetics over void types is:
* A GNU C extension
* Not supported by Clang
* Illegal across all ISO C standards
See also: https://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html
Signed-off-by: Mark Ruvald Pedersen <mped@oticon.com>
Make if statement using pointers explicitly check whether the value is
NULL or not.
The C standard does not say that the null pointer is the same as the
pointer to memory address 0 and because of this is a good practice
always compare with the macro NULL.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Any word started with underscore followed by and uppercase letter or a
second underscore is a reserved word according with C99.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
The return of memset is never checked. This patch explicitly ignore
the return to avoid MISRA-C violations.
The only directory excluded directory was ext/* since it contains
only imported code.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Contains defines enough to compile BSD Sockets subsystem. Values are
compatible with Newlib.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Several code guidelines recommend using uppercase L instead of letter
l (ell) because it can easily be confused with the digit 1 (one).
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Consistently use
config FOO
bool/int/hex/string "Prompt text"
instead of
config FOO
bool/int/hex/string
prompt "Prompt text"
(...and a bunch of other variations that e.g. swapped the order of the
type and the 'prompt', or put other properties between them).
The shorthand is fully equivalent to using 'prompt'. It saves lines and
avoids tricking people into thinking there is some semantic difference.
Most of the grunt work was done by a modified version of
https://unix.stackexchange.com/questions/26284/how-can-i-use-sed-to-replace-a-multi-line-string/26290#26290, but some
of the rarer variations had to be converted manually.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
The read/write implementations call directly into the console drivers
using the hook mechanism, causing faults if invoked from user mode.
Add system calls for read() and write() such that we do a privilege
elevation first.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
The stdout console implementations for minimal libc call directly into
the various console drivers (depending on what specifc hooks are
registered) causing faults when invoked from user mode. This happens,
for example, when using printf() which eventually ends up calling
fputc().
The proper solution is to ensure privileges have been elevated before
the _stdout_hook is called. This was already done for printk().
puts() and fputs() have now been re-defined in terms of the
fputc() and fwrite() functions, which are now system calls.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
The errno "variable" is required to be thread-specific.
It gets defined to a macro which dereferences a pointer
returned by a kernel function.
In user mode, we cannot simply read/write the thread struct.
We do not have thread-local storage mechanism, so for now
use the lowest address of the thread stack to store this
value, since this is guaranteed to be read/writable by
a user thread.
The downside of this approach is potential stack corruption
if the stack pointer goes down this far but does not exceed
the location, since a fault won't be generated in this case.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
We utilize defines like -ESHUTDOWN in the network stack. To support
this errno value with newlib we need to enable
__LINUX_ERRNO_EXTENSIONS__.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
For some reason %F wasn't supported initially. Its simple enough to
handle the case difference in infinity and NaN handling to add support
for %F.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
The C standard says that %f should use '[-]inf' or '[-]infinity' (which
style is implementation defined) for infinity handling and '[-]nan' for
NaN.
We where adding a '+' and had the wrong case for 'inf' and 'nan'.
Before -> After
+INF -> inf
-INF -> -inf
NaN -> nan
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
For %{e,E,g,G} conversion specifiers the C standard says the exponent
contains at least two digits, and only as many digits are necessary. So
instead of 1.234000e-001 we should have 1.234000e-01.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Bool symbols implicitly default to 'n'.
A 'default n' can make sense e.g. in a Kconfig.defconfig file, if you
want to override a 'default y' on the base definition of the symbol. It
isn't used like that on any of these symbols though.
Also simplify the default on STDOUT_CONSOLE. Defaults can be arbitrary
expressions, not just fixed values.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
The charmap table used by strncasecmp() not only used precious 256
bytes of ROM, it also had wrong mappings outside the ASCII range
(123..218).
Rewrite strncasecmp() to call tolower() instead; might be a tiny wee
little bit slower than the current version, but it's not used in any
performance-sensitive parts of the code to justify the waste.
This reduces the ROM footprint for the ws_echo_server sample by ~224
bytes.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
lib/libc/minimal/source/CMakeLists.txt and
lib/libc/minimal/source/stdout/CMakeLists.txt was introduced in
12f8f7616 but it is not used by the build system. CMakeLists.txt in
the parent dir lib/libc/minimal/CMakeLists.txt adds C files to the
target with the lines like:
${CMAKE_CURRENT_SOURCE_DIR}/source/stdlib/atoi.c
${CMAKE_CURRENT_SOURCE_DIR}/source/stdlib/strtol.c
To make other empty CMakeLists.txt explicit, this commit adds a
comment line to them.
Signed-off-by: Yasushi SHOJI <y-shoji@ispace-inc.com>
The minimal libc source files have been added to 'app'. The Zephyr
build system should not be adding source files to the 'app' library
unless necessary.
This patch creates a new Zephyr CMake Library in lib/libc/minimal and
adds the sources to it.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
When we introduced NEWLIB_LIBC_ALIGNED_HEAP_SIZE in commit
42a2c96422. We accidently had the Kconfig
symbol depend on CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT the leading
'CONFIG_' shouldn't exist.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This constant should be defined in limits.h. Define it in limits.h in
the minimal libc, and use the definition found in newlib's includes.
Values in newlib includes range from 1024 to 4096.
The rationale is that all code should use the same value; having
buffers specified with different sizes will lead to interoperability
and out of bounds array writes.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Add IEEE 1003.1 Posix Style file system API support.
These API's will internally use corresponding Zephyr
File System API's.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
The implementation of fwrite() in the minimal libc does not increment
the source pointer, and thus always print the same character.
Signed-off-by: Florian Vaussard <florian.vaussard@gmail.com>
MPU devices that enforce power-of-two alignment now
specify the size of the buffer used for the newlib heap.
This buffer will be properly aligned and a pointer
exposed in a kernel header, such that it can be added
to a user thread's memory domain configuration if
necessary.
MPU devices that don't have these restrictions allocate
the heap as normal.
In all cases, if an MPU/MMU region needs to be programmed,
the z_newlib_get_heap_bounds() API will return the necessary
information.
Given how precious MPU regions are, no automatic programming
of the MPU is done; applications will need to do this as
needed in their memory domain configurations.
On x86, the x86 MMU-specific code has been moved to arch/x86
using the new z_newlib_get_heap_bounds() API.
Fixes: #6814
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Newlib uses any RAM between _end and the bounds of physical
RAM for the _sbrk() heap. Set up a user-writable region
so that this works properly on x86.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Calling POSIX exit() function in Zephyr w/newlib leads to printing
"exit" to stdout followed by infinite loop. That message was
printed without a newline though, leading to confusing artifacts
in the console output.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
We want to support other toolchain not based on GCC, so the variable is
confusing, use ZEPHYR_TOOLCHAIN_VARIANT instead.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Enable stdio to work by default if Newlib is used as libc - it's
reasonable expectation that if full-fledged libc (like Newlib) is
selected, then printf() works out of the box.
Fixes: #5566
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Add abs function to the minimal libc. This is present in
NEWLIB_LIBC, but adding it here avoid to make a dependency
with NEWLIB_LIBC.
Signed-off-by: Vincent Veron <vincent.veron@st.com>
CROSS_COMPILE is a KBuild feature that was dropped during the CMake
migration. It is now re-introduced. Documentation for it is still
lacking, but at least it now behaves as expected.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
This code is commonly used in the Linux kernel for reporting a
retryable error like a failed CRC. This name and value is already
present in Linux and newlib.
Signed-off-by: Michael Hope <mlhx@google.com>
When building a native application, we use the host provided libc, so do
not build minimal libc or newlib.
Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Introducing CMake is an important step in a larger effort to make
Zephyr easy to use for application developers working on different
platforms with different development environment needs.
Simplified, this change retains Kconfig as-is, and replaces all
Makefiles with CMakeLists.txt. The DSL-like Make language that KBuild
offers is replaced by a set of CMake extentions. These extentions have
either provided simple one-to-one translations of KBuild features or
introduced new concepts that replace KBuild concepts.
This is a breaking change for existing test infrastructure and build
scripts that are maintained out-of-tree. But for FW itself, no porting
should be necessary.
For users that just want to continue their work with minimal
disruption the following should suffice:
Install CMake 3.8.2+
Port any out-of-tree Makefiles to CMake.
Learn the absolute minimum about the new command line interface:
$ cd samples/hello_world
$ mkdir build && cd build
$ cmake -DBOARD=nrf52_pca10040 ..
$ cd build
$ make
PR: zephyrproject-rtos#4692
docs: http://docs.zephyrproject.org/getting_started/getting_started.html
Signed-off-by: Sebastian Boe <sebastian.boe@nordicsemi.no>
The C11 standard requires this. From 7.2 "Diagnostics <assert.h>"
paragraph 1:
> The header <assert.h> defines the assert and static_assert macros...
paragraph 3:
> The macro
> static_assert
> expands to _Static_assert.
Since static_assert is a keyword in C++11, don't define it if C++.
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
The C standard requires assert() to be a void result, so you
could write something like:
return assert(x), x;
From the C11 standard (7.2 Diagnostic <assert.h>):
> If NDEBUG is defined as a macro name at the point in the source file
> where <assert.h> is included, the assert macro is defined simply as
> #define assert(ignore) ((void)0)
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
This header is included by some files provided by ESP-IDF. Nothing
from this header file is actually used: it's only being added allow
things to compile with the minimal libc.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Paul Sokolovsky