Commit 6870bdb3 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by Daniel Borkmann
Browse files

bpf: Support can_loop/cond_break on big endian 



Add big endian support for can_loop/cond_break macros.

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarYonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20240613013815.953-4-alexei.starovoitov@gmail.com
parent 98d7ca37

tools/testing/selftests/bpf/bpf_experimental.h

+28 −0
Original line number Diff line number Diff line
@@ -351,6 +351,7 @@ l_true: \ 
	l_continue:;					\

	})

#else

#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__

#define can_loop					\

	({ __label__ l_break, l_continue;		\

	bool ret = true;				\
@@ -376,6 +377,33 @@ l_true: \ 
	l_break: break;					\

	l_continue:;					\

	})

#else

#define can_loop					\

	({ __label__ l_break, l_continue;		\

	bool ret = true;				\

	asm volatile goto("1:.byte 0xe5;		\

		      .byte 0;				\

		      .long (((%l[l_break] - 1b - 8) / 8) & 0xffff) << 16;	\

		      .short 0"				\

		      :::: l_break);			\

	goto l_continue;				\

	l_break: ret = false;				\

	l_continue:;					\

	ret;						\

	})



#define cond_break					\

	({ __label__ l_break, l_continue;		\

	asm volatile goto("1:.byte 0xe5;		\

		      .byte 0;				\

		      .long (((%l[l_break] - 1b - 8) / 8) & 0xffff) << 16;	\

		      .short 0"				\

		      :::: l_break);			\

	goto l_continue;				\

	l_break: break;					\

	l_continue:;					\

	})

#endif

#endif



#ifndef bpf_nop_mov