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bpf: Support can_loop/cond_break on big endian

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Add big endian support for can_loop/cond_break macros.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20240613013815.953-4-alexei.starovoitov@gmail.com
This commit is contained in:
Alexei Starovoitov 2024-06-12 18:38:14 -07:00 committed by Daniel Borkmann
parent 98d7ca374b
commit 6870bdb3f4
1 changed files with 28 additions and 0 deletions
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28
tools/testing/selftests/bpf/bpf_experimental.h
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@ -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