gcc-9: silence 'address-of-packed-member' warning ...

As done in the Linux Kernel. Most of the packed structures we have
are optimized to not generate any unaligned accesses, so this warning
produces a lot of false positives which are hard to fix in the code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/tftp'

Merge branch 'for-next/stm32'

Merge branch 'for-next/socfpga'

Merge branch 'for-next/sandbox'

Merge branch 'for-next/reset-source'

Merge branch 'for-next/qemu'

Merge branch 'for-next/omap'

Merge branch 'for-next/net'

Merge branch 'for-next/mtd'

Merge branch 'for-next/misc'

Merge branch 'for-next/mips'

Merge branch 'for-next/imx'

Merge branch 'for-next/fsanitize'

Merge branch 'for-next/for-master'

Merge branch 'for-next/dts'

Merge branch 'for-next/arm'

Release v2019.09.0 ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

watchdog: add support for STPMIC1 integrated watchdog ...

The driver adds support for the PMIC's watchdog, reset, poweroff
and reset reason query capabilities.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: add support for STPMIC1 ...

The PMIC is addressable over I2C and, besides power management,
integrates a watchdog, a user power on key handling and 64 bit of
non-volatile memory.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i2c: add stm32f7 I2C adapter driver ...

This patch adds initial support for the STM32F7 I2C controller.
It was tested to work with the STM32MP157C.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i2c: port Linux i2c_parse_fw_timings ...

Linux has a generic function for extracting i2c timings parameters from
device-associated firmware nodes. Port this function to barebox, but
have it only work on device tree nodes for now.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

hwrng: add sandbox driver interface to host /dev/random ...

Linux as well as other operating systems can provide /dev/random and
/dev/urandom device to service userspace need for randomness.
Add a driver to use /dev/random for blocking and /dev/urandom for
non-blocking barebox random numbers.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: dts: add example for barebox, hostfile backed state ...

Previous commit now allows probing barebox,hostfile to be probed from
device tree. Add a barebox state node that shows how to use it. It's not
included by default, same as barebox-libftdi-example.dtsi in the same
directory.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: hostfile: allow probing from device tree ...

When testing things like barebox state in sandbox, it's nice to be able
to refer to a partition on a hostfile by phandle. Support this by
checking for reading the barebox,filename property.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: support Address and UndefinedBehavior sanitizers ...

For the hosted implementation, we just need to pass the appropriate
options at compile and link time. No further arch-specific
code needed.

Because we define our own handlers in lib/ubsan.c, linking against
libubsan isn't strictly required. We do it anyway on sandbox, so we can
use the backtrace functionality within.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: use sanitizer unwind for dump_stack if available ...

The sanitize unwind looks pretty and is just a function call away if we
are compiling with KASAN or UBSAN. Use it if available.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: add generic CONFIG_KASAN option ...

-fsanitize=[kernel-]address-sanitizer allows compile-time instrumentation
of memory accesses to detect some classes of runtime undefined behavior.

In preparation for allowing arches to provide infrastructure in support
of this feature, add the generic KASAN options.

These are only shown in the debug menu when the arch selects the
appropriate symbol. The option is named equally to their Linux counterparts.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: add intentionally UB triggering ubsan command ...

For testing whether ubsan works, triggering undefined behavior to detect
is a nice development aid. Port the Linux test_ubsan module to barebox
as a command.

barebox@Embest MarS Board i.MX6Dual:/ ubsan shift
ERROR: ================================================================================
ERROR: UBSAN: Undefined behaviour in commands/ubsan.c:53:7
ERROR: shift exponent -1 is negative
WARNING: [<4fd77325>] (unwind_backtrace+0x1/0x68) from [<4fd5bc0f>] (ubsan_epilogue.isra.6+0x7/0x20)
WARNING: [<4fd5bc0f>] (ubsan_epilogue.isra.6+0x7/0x20) from [<4fd5bf8d>] (__ubsan_handle_shift_out_of_bounds+0x49/0xb8)
WARNING: [<4fd5bf8d>] (__ubsan_handle_shift_out_of_bounds+0x49/0xb8) from [<4fd51ed7>] (test_ubsan_shift_out_of_bounds+0x23/0x2c)
WARNING: [<4fd51ed7>] (test_ubsan_shift_out_of_bounds+0x23/0x2c) from [<4fd51fd7>] (do_ubsan+0x3b/0x54)
WARNING: [<4fd51fd7>] (do_ubsan+0x3b/0x54) from [<4fd03a4d>] (execute_command+0x21/0x48)
WARNING: [<4fd03a4d>] (execute_command+0x21/0x48) from [<4fd09591>] (run_list_real+0x5b5/0x610)
WARNING: [<4fd09591>] (run_list_real+0x5b5/0x610) from [<4fd08ed9>] (parse_stream_outer+0x105/0x164)
WARNING: [<4fd08ed9>] (parse_stream_outer+0x105/0x164) from [<4fd097b1>] (run_shell+0x35/0x64)
WARNING: [<4fd097b1>] (run_shell+0x35/0x64) from [<4fd00d43>] (run_init+0x8f/0x168)
WARNING: [<4fd00d43>] (run_init+0x8f/0x168) from [<4fd00e35>] (start_barebox+0x19/0x54)
WARNING: [<4fd00e35>] (start_barebox+0x19/0x54) from [<4fd75843>] (barebox_non_pbl_start+0xc7/0x108)
WARNING: [<4fd75843>] (barebox_non_pbl_start+0xc7/0x108) from [<4fd00005>] (__bare_init_start+0x1/0xc)
ERROR: ================================================================================

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: add generic CONFIG_UBSAN plumbing ...

-fsanitize=undefined allows compile-time instrumentation of code to detect
some classes of runtime undefined behavior.

In preparation for allowing arches to provide infrastructure in support
of this feature, add some generic UBSAN options and associated plumbing.

These are only shown in the debug menu when the arch selects the
appropriate symbol. The option is named equally to their Linux counterparts.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>