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e4bed26281
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> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292204 91177308-0d34-0410-b5e6-96231b3b80d8
26 lines
741 B
LLVM
26 lines
741 B
LLVM
; RUN: not llc < %s -march=bpf | FileCheck %s
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%struct.key_t = type { i32, [16 x i8] }
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; Function Attrs: nounwind uwtable
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define i32 @test() #0 {
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%key = alloca %struct.key_t, align 4
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%1 = bitcast %struct.key_t* %key to i8*
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; CHECK: r1 = 0
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; CHECK: *(u32 *)(r10 - 8) = r1
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; CHECK: *(u64 *)(r10 - 16) = r1
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; CHECK: *(u64 *)(r10 - 24) = r1
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call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 20, i32 4, i1 false)
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; CHECK: r1 = r10
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; CHECK: r1 += -20
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%2 = getelementptr inbounds %struct.key_t, %struct.key_t* %key, i64 0, i32 1, i64 0
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; CHECK: call test1
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call void @test1(i8* %2) #3
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ret i32 0
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}
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; Function Attrs: nounwind argmemonly
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #1
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declare void @test1(i8*) #2
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