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llvm-project/llvm/test/CodeGen/BPF/objdump_trivial.ll

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[bpf] add BPF disassembler add BPF disassembler, so tools like llvm-objdump can be used: $ llvm-objdump -d -no-show-raw-insn ./sockex1_kern.o ./sockex1_kern.o: file format ELF64-BPF Disassembly of section socket1: bpf_prog1: 0: r6 = r1 8: r0 = *(u8 *)skb[23] 10: *(u32 *)(r10 - 4) = r0 18: r1 = *(u32 *)(r6 + 4) 20: if r1 != 4 goto 8 28: r2 = r10 30: r2 += -4 ld_imm64 (the only 16-byte insn) and special ld_abs/ld_ind instructions had to be treated in a special way. The decoders for the rest of the insns are automatically generated. Add tests to cover new functionality. Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 287477
2016-11-20 10:25:00 +08:00
; RUN: llc -march=bpfel -filetype=obj -o - %s | llvm-objdump -d - | FileCheck %s
; CHECK: if r2 s> r1 goto
[bpf] error when unknown bpf helper is called Emit error when BPF backend sees a call to a global function or to an external symbol. The kernel verifier only allows calls to predefined helpers from bpf.h which are defined in 'enum bpf_func_id'. Such calls in assembler must look like 'call [1-9]+' where number matches bpf_func_id. Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 292204
2017-01-17 15:26:17 +08:00
; CHECK: call 1
; CHECK: exit
; CHECK: call 2
[bpf] add BPF disassembler add BPF disassembler, so tools like llvm-objdump can be used: $ llvm-objdump -d -no-show-raw-insn ./sockex1_kern.o ./sockex1_kern.o: file format ELF64-BPF Disassembly of section socket1: bpf_prog1: 0: r6 = r1 8: r0 = *(u8 *)skb[23] 10: *(u32 *)(r10 - 4) = r0 18: r1 = *(u32 *)(r6 + 4) 20: if r1 != 4 goto 8 28: r2 = r10 30: r2 += -4 ld_imm64 (the only 16-byte insn) and special ld_abs/ld_ind instructions had to be treated in a special way. The decoders for the rest of the insns are automatically generated. Add tests to cover new functionality. Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 287477
2016-11-20 10:25:00 +08:00
; CHECK: exit
define void @foo(i32 %a) {
%b = icmp sgt i32 %a, -1
br i1 %b, label %x, label %y
x:
[bpf] error when unknown bpf helper is called Emit error when BPF backend sees a call to a global function or to an external symbol. The kernel verifier only allows calls to predefined helpers from bpf.h which are defined in 'enum bpf_func_id'. Such calls in assembler must look like 'call [1-9]+' where number matches bpf_func_id. Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 292204
2017-01-17 15:26:17 +08:00
call void inttoptr (i64 1 to void ()*)()
[bpf] add BPF disassembler add BPF disassembler, so tools like llvm-objdump can be used: $ llvm-objdump -d -no-show-raw-insn ./sockex1_kern.o ./sockex1_kern.o: file format ELF64-BPF Disassembly of section socket1: bpf_prog1: 0: r6 = r1 8: r0 = *(u8 *)skb[23] 10: *(u32 *)(r10 - 4) = r0 18: r1 = *(u32 *)(r6 + 4) 20: if r1 != 4 goto 8 28: r2 = r10 30: r2 += -4 ld_imm64 (the only 16-byte insn) and special ld_abs/ld_ind instructions had to be treated in a special way. The decoders for the rest of the insns are automatically generated. Add tests to cover new functionality. Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 287477
2016-11-20 10:25:00 +08:00
ret void
y:
[bpf] error when unknown bpf helper is called Emit error when BPF backend sees a call to a global function or to an external symbol. The kernel verifier only allows calls to predefined helpers from bpf.h which are defined in 'enum bpf_func_id'. Such calls in assembler must look like 'call [1-9]+' where number matches bpf_func_id. Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 292204
2017-01-17 15:26:17 +08:00
call void inttoptr (i64 2 to void ()*)()
[bpf] add BPF disassembler add BPF disassembler, so tools like llvm-objdump can be used: $ llvm-objdump -d -no-show-raw-insn ./sockex1_kern.o ./sockex1_kern.o: file format ELF64-BPF Disassembly of section socket1: bpf_prog1: 0: r6 = r1 8: r0 = *(u8 *)skb[23] 10: *(u32 *)(r10 - 4) = r0 18: r1 = *(u32 *)(r6 + 4) 20: if r1 != 4 goto 8 28: r2 = r10 30: r2 += -4 ld_imm64 (the only 16-byte insn) and special ld_abs/ld_ind instructions had to be treated in a special way. The decoders for the rest of the insns are automatically generated. Add tests to cover new functionality. Signed-off-by: Alexei Starovoitov <ast@kernel.org> llvm-svn: 287477
2016-11-20 10:25:00 +08:00
ret void
}