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a3493b3338
Add a --debug-checksum=<funcs> option to the check subcommand to print the calculated checksum of each instruction in the given functions. This is useful for determining where two versions of a function begin to diverge. Acked-by: Petr Mladek <pmladek@suse.com> Tested-by: Joe Lawrence <joe.lawrence@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _OBJTOOL_CHECKSUM_H
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#define _OBJTOOL_CHECKSUM_H
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#include <objtool/elf.h>
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#ifdef BUILD_KLP
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static inline void checksum_init(struct symbol *func)
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{
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if (func && !func->csum.state) {
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func->csum.state = XXH3_createState();
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XXH3_64bits_reset(func->csum.state);
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}
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}
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static inline void checksum_update(struct symbol *func,
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struct instruction *insn,
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const void *data, size_t size)
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{
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XXH3_64bits_update(func->csum.state, data, size);
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dbg_checksum(func, insn, XXH3_64bits_digest(func->csum.state));
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}
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static inline void checksum_finish(struct symbol *func)
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{
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if (func && func->csum.state) {
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func->csum.checksum = XXH3_64bits_digest(func->csum.state);
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func->csum.state = NULL;
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}
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}
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#else /* !BUILD_KLP */
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static inline void checksum_init(struct symbol *func) {}
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static inline void checksum_update(struct symbol *func,
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struct instruction *insn,
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const void *data, size_t size) {}
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static inline void checksum_finish(struct symbol *func) {}
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#endif /* !BUILD_KLP */
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#endif /* _OBJTOOL_CHECKSUM_H */
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