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16152fad79
It is an extension of GCC CPP to:
* allow omitting a variable macro argument entirely, and
* use ## __VA_ARGS__ to remove the the comma before ## __VA_ARGS__ when
__VA_ARGS__ is empty.
The only use of ## _VA_ARGS__ is to define the pr_xxx() macros, with the first
argument being the format string and the rest the to-be-formatted arguments. The
format string is explicitly spelled out because another macro pr_fmt() is used
to add to the format string a prefix which is customizable by defining what
pr_fmt() expands to.
For C99 compliance, this patch changes the pr_xxx() macros in the following
pattern.
- #define pr_fatal(fmt, ...) \
- do_logmsg(LOG_FATAL, pr_fmt(fmt), ## __VA_ARGS__); \
+ #define pr_fatal(...) \
+ do_logmsg(LOG_FATAL, pr_prefix __VA_ARGS__); \
Reference:
* https://gcc.gnu.org/onlinedocs/gcc/Variadic-Macros.html#Variadic-Macros
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef LOGMSG_H
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#define LOGMSG_H
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/* Logging severity levels */
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#define LOG_FATAL 1
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#define LOG_ERROR 2
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#define LOG_WARNING 3
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#define LOG_INFO 4
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#define LOG_DEBUG 5
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/* Logging flags */
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#define LOG_FLAG_STDOUT 0x00000001
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#define LOG_FLAG_MEMORY 0x00000002
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#if defined(HV_DEBUG)
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extern uint32_t console_loglevel;
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extern uint32_t mem_loglevel;
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void init_logmsg(uint32_t mem_size, uint32_t flags);
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void print_logmsg_buffer(uint32_t cpu_id);
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void do_logmsg(uint32_t severity, const char *fmt, ...);
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#else /* HV_DEBUG */
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static inline void init_logmsg(__unused uint32_t mem_size,
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__unused uint32_t flags)
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{
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}
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static inline void do_logmsg(__unused uint32_t severity,
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__unused const char *fmt, ...)
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{
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}
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static inline void print_logmsg_buffer(__unused uint32_t cpu_id)
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{
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}
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#endif /* HV_DEBUG */
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#ifndef pr_prefix
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#define pr_prefix
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#endif
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#define pr_fatal(...) \
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do { \
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do_logmsg(LOG_FATAL, pr_prefix __VA_ARGS__); \
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} while (0)
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#define pr_err(...) \
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do { \
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do_logmsg(LOG_ERROR, pr_prefix __VA_ARGS__); \
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} while (0)
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#define pr_warn(...) \
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do { \
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do_logmsg(LOG_WARNING, pr_prefix __VA_ARGS__); \
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} while (0)
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#define pr_info(...) \
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do { \
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do_logmsg(LOG_INFO, pr_prefix __VA_ARGS__); \
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} while (0)
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#define pr_dbg(...) \
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do { \
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do_logmsg(LOG_DEBUG, pr_prefix __VA_ARGS__); \
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} while (0)
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#define dev_dbg(lvl, ...) \
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do { \
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do_logmsg(lvl, pr_prefix __VA_ARGS__); \
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} while (0)
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#define panic(...) \
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do { pr_fatal("Instruction Decode PANIC: " __VA_ARGS__); \
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while (1) { asm volatile ("pause" ::: "memory"); }; } while (0)
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#endif /* LOGMSG_H */
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