Commit a05e9042 authored by Daniel Xu's avatar Daniel Xu Committed by Alexei Starovoitov
Browse files

bpf: btf: Add BTF_KFUNCS_START/END macro pair 



This macro pair is functionally equivalent to BTF_SET8_START/END, except
with BTF_SET8_KFUNCS flag set in the btf_id_set8 flags field. The next
commit will codemod all kfunc set8s to this new variant such that all
kfuncs are tagged as such in .BTF_ids section.

Signed-off-by: default avatarDaniel Xu <dxu@dxuuu.xyz>
Link: https://lore.kernel.org/r/d536c57c7c2af428686853cc7396b7a44faa53b7.1706491398.git.dxu@dxuuu.xyz


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 79b47344

include/linux/btf_ids.h

+11 −0
Original line number Diff line number Diff line
@@ -8,6 +8,9 @@ struct btf_id_set { 
	u32 ids[];

};



/* This flag implies BTF_SET8 holds kfunc(s) */

#define BTF_SET8_KFUNCS		(1 << 0)



struct btf_id_set8 {

	u32 cnt;

	u32 flags;
@@ -204,6 +207,12 @@ asm( \ 
".popsection;                                 \n");	\

extern struct btf_id_set8 name;



#define BTF_KFUNCS_START(name)				\

__BTF_SET8_START(name, local, BTF_SET8_KFUNCS)



#define BTF_KFUNCS_END(name)				\

BTF_SET8_END(name)



#else



#define BTF_ID_LIST(name) static u32 __maybe_unused name[64];
@@ -218,6 +227,8 @@ extern struct btf_id_set8 name; 
#define BTF_SET_END(name)

#define BTF_SET8_START(name) static struct btf_id_set8 __maybe_unused name = { 0 };

#define BTF_SET8_END(name)

#define BTF_KFUNCS_START(name) static struct btf_id_set8 __maybe_unused name = { .flags = BTF_SET8_KFUNCS };

#define BTF_KFUNCS_END(name)



#endif /* CONFIG_DEBUG_INFO_BTF */