U-Boot define loff_t as long long. But the header
/usr/include/linux/types.h may not define it.
This has lead to a build error on Alpine Linux.

So let's use long long instead of loff_t for
the size parameter of function os_get_filesize().

Reported-by: Milan P. Stanić <mps@arvanta.net>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Tested-by: Milan P. Stanić <mps@arvanta.net>
Reviewed-by: Simon Glass <sjg@chromium.org>

Add the opposite of mapping, so that we can unmap and avoid running out of
address space.

Signed-off-by: Simon Glass <sjg@chromium.org>

It is useful to map a file into memory so that it can be accessed using
simple pointers. Add a function to support this.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a function to return the size of a file. This is useful in situations
where we need to allocate memory for it before reading it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>

The SPL header has a function for obtaining the phase in capital letters,
e.g. 'SPL'. Add one for lower-case also, as used by sandbox.

Use this to generalise the sandbox logic for determining the filename of
the next sandbox executable. This can provide support for VPL.

Signed-off-by: Simon Glass <sjg@chromium.org>

Avoid 'make htmldocs' build warnings:

    ./include/os.h:139: warning:
    Function parameter or member 'ptr' not described in 'os_realloc'
    ./include/os.h:139: warning:
    Function parameter or member 'length' not described in 'os_realloc'

Fixes: 14e46dfb176b ("sandbox: Add os_realloc()")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

At present this function can only locate the u-boot ELF file. For SPL it
is handy to be able to locate u-boot.img since this is what would normally
be loaded by SPL.

Add another argument to allow this to be selected.

While we are here, update the function to load SPL when running in TPL,
since that is the next stage.

Signed-off-by: Simon Glass <sjg@chromium.org>

This state is not accessible to the running U-Boot but at present it is
allocated in the emulated SDRAM. This doesn't seem very useful. Adjust
it to allocate from the OS instead.

The RAM buffer is currently not freed, but should be, so add that into
state_uninit(). Update the comment for os_free() to indicate that NULL is
a valid parameter value.

Note that the strdup() in spl_board_load_image() is changed as well, since
strdup() allocates memory in the RAM buffer.

Signed-off-by: Simon Glass <sjg@chromium.org>

We provide os_malloc() and os_free() but not os_realloc(). Add this,
following the usual semantics. Also update os_malloc() to behave correctly
when passed a zero size.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

gcc -fanalyzer needs the information that a function does not return to
provide accurate information.

os_abort() does not return. Mark it accordingly.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>