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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
49 lines
873 B
LLVM
49 lines
873 B
LLVM
; RUN: not llc < %s -march=bpfel | FileCheck %s
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define void @test() #0 {
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entry:
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; CHECK: test:
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; CHECK: call f_i16
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; CHECK: *(u16 *)(r1 + 0) = r0
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%0 = call i16 @f_i16()
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store volatile i16 %0, i16* @g_i16
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; CHECK: call f_i32
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; CHECK: *(u32 *)(r1 + 0) = r0
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%1 = call i32 @f_i32()
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store volatile i32 %1, i32* @g_i32
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; CHECK: call f_i64
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; CHECK: *(u64 *)(r1 + 0) = r0
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%2 = call i64 @f_i64()
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store volatile i64 %2, i64* @g_i64
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ret void
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}
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@g_i16 = common global i16 0, align 2
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@g_i32 = common global i32 0, align 2
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@g_i64 = common global i64 0, align 2
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define i16 @f_i16() #0 {
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; CHECK: f_i16:
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; CHECK: r0 = 1
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; CHECK: exit
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ret i16 1
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}
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define i32 @f_i32() #0 {
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; CHECK: f_i32:
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; CHECK: r0 = 16909060
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; CHECK: exit
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ret i32 16909060
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}
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define i64 @f_i64() #0 {
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; CHECK: f_i64:
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; CHECK: r0 = 72623859790382856ll
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; CHECK: exit
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ret i64 72623859790382856
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}
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