7c10cb38cc
Add libdw-based functions for loading and querying debuginfo. Load debuginfo from the system and the linux-user loaders. This is useful for the upcoming perf support, which can then put human-readable guest symbols instead of raw guest PCs into perfmap and jitdump files. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20230112152013.125680-3-iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* Debug information support.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef ACCEL_TCG_DEBUGINFO_H
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#define ACCEL_TCG_DEBUGINFO_H
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/*
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* Debuginfo describing a certain address.
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*/
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struct debuginfo_query {
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uint64_t address; /* Input: address. */
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int flags; /* Input: debuginfo subset. */
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const char *symbol; /* Symbol that the address is part of. */
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uint64_t offset; /* Offset from the symbol. */
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const char *file; /* Source file associated with the address. */
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int line; /* Line number in the source file. */
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};
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/*
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* Debuginfo subsets.
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*/
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#define DEBUGINFO_SYMBOL BIT(1)
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#define DEBUGINFO_LINE BIT(2)
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#if defined(CONFIG_TCG) && defined(CONFIG_LIBDW)
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/*
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* Load debuginfo for the specified guest ELF image.
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* Return true on success, false on failure.
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*/
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void debuginfo_report_elf(const char *name, int fd, uint64_t bias);
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/*
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* Take the debuginfo lock.
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*/
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void debuginfo_lock(void);
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/*
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* Fill each on N Qs with the debuginfo about Q->ADDRESS as specified by
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* Q->FLAGS:
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*
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* - DEBUGINFO_SYMBOL: update Q->SYMBOL and Q->OFFSET. If symbol debuginfo is
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* missing, then leave them as is.
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* - DEBUINFO_LINE: update Q->FILE and Q->LINE. If line debuginfo is missing,
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* then leave them as is.
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*
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* This function must be called under the debuginfo lock. The results can be
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* accessed only until the debuginfo lock is released.
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*/
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void debuginfo_query(struct debuginfo_query *q, size_t n);
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/*
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* Release the debuginfo lock.
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*/
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void debuginfo_unlock(void);
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#else
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static inline void debuginfo_report_elf(const char *image_name, int image_fd,
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uint64_t load_bias)
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{
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}
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static inline void debuginfo_lock(void)
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{
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}
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static inline void debuginfo_query(struct debuginfo_query *q, size_t n)
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{
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}
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static inline void debuginfo_unlock(void)
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{
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}
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#endif
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#endif
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