diff options
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_experimental.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h index bc9a0832ae72..a5b9df38c162 100644 --- a/tools/testing/selftests/bpf/bpf_experimental.h +++ b/tools/testing/selftests/bpf/bpf_experimental.h @@ -343,6 +343,49 @@ l_true: \ asm volatile("%[reg]=%[reg]"::[reg]"r"((short)var)) #endif +/* emit instruction: + * rX = rX .off = BPF_ADDR_SPACE_CAST .imm32 = (dst_as << 16) | src_as + */ +#ifndef bpf_addr_space_cast +#define bpf_addr_space_cast(var, dst_as, src_as)\ + asm volatile(".byte 0xBF; \ + .ifc %[reg], r0; \ + .byte 0x00; \ + .endif; \ + .ifc %[reg], r1; \ + .byte 0x11; \ + .endif; \ + .ifc %[reg], r2; \ + .byte 0x22; \ + .endif; \ + .ifc %[reg], r3; \ + .byte 0x33; \ + .endif; \ + .ifc %[reg], r4; \ + .byte 0x44; \ + .endif; \ + .ifc %[reg], r5; \ + .byte 0x55; \ + .endif; \ + .ifc %[reg], r6; \ + .byte 0x66; \ + .endif; \ + .ifc %[reg], r7; \ + .byte 0x77; \ + .endif; \ + .ifc %[reg], r8; \ + .byte 0x88; \ + .endif; \ + .ifc %[reg], r9; \ + .byte 0x99; \ + .endif; \ + .short %[off]; \ + .long %[as]" \ + : [reg]"+r"(var) \ + : [off]"i"(BPF_ADDR_SPACE_CAST) \ + , [as]"i"((dst_as << 16) | src_as)); +#endif + /* Description * Assert that a conditional expression is true. * Returns |