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2d9650b5d9
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
19 lines
358 B
LLVM
19 lines
358 B
LLVM
; RUN: llc -march=bpfel -filetype=obj -o - %s | llvm-objdump -d - | FileCheck %s
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; CHECK: if r2 s> r1 goto
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; CHECK: call 1
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; CHECK: exit
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; CHECK: call 2
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; CHECK: exit
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define void @foo(i32 %a) {
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%b = icmp sgt i32 %a, -1
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br i1 %b, label %x, label %y
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x:
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call void inttoptr (i64 1 to void ()*)()
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ret void
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y:
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call void inttoptr (i64 2 to void ()*)()
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ret void
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}
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