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https://github.com/zephyrproject-rtos/zephyr
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75f77db432
There are issues using lowercase min and max macros when compiling a C++ application with a third-party toolchain such as GNU ARM Embedded when using some STL headers i.e. <chrono>. This is because there are actual C++ functions called min and max defined in some of the STL headers and these macros interfere with them. By changing the macros to UPPERCASE, which is consistent with almost all other pre-processor macros this naming conflict is avoided. All files that use these macros have been updated. Signed-off-by: Carlos Stuart <carlosstuart1970@gmail.com>
101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/*
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* Copyright (c) 2018 Oticon A/S
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Pseudo-random entropy generator for the ARCH_POSIX architecture:
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* Following the principle of reproducibility of the native_posix board
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* this entropy device will always generate the same random sequence when
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* initialized with the same seed
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*
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* This entropy source should only be used for testing.
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*/
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#include "device.h"
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#include "entropy.h"
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#include "init.h"
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#include "misc/util.h"
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#include <stdlib.h>
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#include <string.h>
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#include "posix_trace.h"
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#include "soc.h"
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#include "cmdline.h" /* native_posix command line options header */
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static unsigned int seed = 0x5678;
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static int entropy_native_posix_get_entropy(struct device *dev, u8_t *buffer,
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u16_t length)
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{
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ARG_UNUSED(dev);
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while (length) {
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/*
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* Note that only 1 thread (Zephyr thread or HW models), runs at
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* a time, therefore there is no need to use random_r()
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*/
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long int value = random();
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size_t to_copy = MIN(length, sizeof(long int));
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memcpy(buffer, &value, to_copy);
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buffer += to_copy;
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length -= to_copy;
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}
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return 0;
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}
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static int entropy_native_posix_get_entropy_isr(struct device *dev, u8_t *buf,
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u16_t len, u32_t flags)
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{
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ARG_UNUSED(flags);
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/*
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* entropy_native_posix_get_entropy() is also safe for ISRs
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* and always produces data.
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*/
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return entropy_native_posix_get_entropy(dev, buf, len);
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}
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static int entropy_native_posix_init(struct device *dev)
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{
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ARG_UNUSED(dev);
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srandom(seed);
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posix_print_warning("WARNING: "
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"Using a test - not safe - entropy source\n");
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return 0;
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}
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static const struct entropy_driver_api entropy_native_posix_api_funcs = {
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.get_entropy = entropy_native_posix_get_entropy,
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.get_entropy_isr = entropy_native_posix_get_entropy_isr
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};
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DEVICE_AND_API_INIT(entropy_native_posix, CONFIG_ENTROPY_NAME,
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entropy_native_posix_init, NULL, NULL,
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PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
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&entropy_native_posix_api_funcs);
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static void add_fake_entropy_option(void)
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{
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static struct args_struct_t entropy_options[] = {
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/*
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* Fields:
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* manual, mandatory, switch,
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* option_name, var_name ,type,
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* destination, callback,
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* description
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*/
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{false, false, false,
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"seed", "r_seed", 'u',
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(void *)&seed, NULL,
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"A 32-bit integer seed value for the entropy device, such as "
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"97229 (decimal), 0x17BCD (hex), or 0275715 (octal)"},
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ARG_TABLE_ENDMARKER
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};
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native_add_command_line_opts(entropy_options);
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}
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NATIVE_TASK(add_fake_entropy_option, PRE_BOOT_1, 10);
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