Yonghong Song 98a5765c03 bpf: signal error instead of silent drop for certain invalid asm insn ... Currently, an invalid asm insn, either in an asm file or in an inline asm format, might be silently dropped. This patch fixed two places where this may happen by signaling the error so user knows what goes wrong. The following is an example to demonstrate error messages: -bash-4.2$ cat t.c int test(void *ctx) { #if defined(NO_ERROR) asm volatile("r0 = *(u16 *)skb[%0]" : : "i"(2)); #elif defined(ERROR_1) asm volatile("r20 = *(u16 *)skb[%0]" : : "i"(2)); #elif defined(ERROR_2) asm volatile("r0 = *(u16 *)(r1 + ?)" : :); #endif return 0; } -bash-4.2$ cat run.sh for macro in NO_ERROR ERROR_1 ERROR_2; do echo "===== compile for macro" $macro clang -D${macro} -O2 -target bpf -emit-llvm -S t.c echo "==llc==" llc -march=bpf -filetype=obj t.ll done -bash-4.2$ ./run.sh ===== compile for macro NO_ERROR ==llc== ===== compile for macro ERROR_1 ==llc== <inline asm>:1:2: error: invalid register/token name r20 = *(u16 *)skb[2] ^ note: !srcloc = 135 ===== compile for macro ERROR_2 ==llc== <inline asm>:1:21: error: unexpected token r0 = *(u16 *)(r1 + ?) ^ note: !srcloc = 210 -bash-4.2$ Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329849 91177308-0d34-0410-b5e6-96231b3b80d8		2018-04-11 20:24:52 +00:00
..
AsmParser	bpf: signal error instead of silent drop for certain invalid asm insn	2018-04-11 20:24:52 +00:00
Disassembler	bpf: New decoder namespace for 32-bit subregister load/store	2018-02-23 23:49:31 +00:00
InstPrinter	Remove some unused includes to fix layering.	2018-03-29 00:29:45 +00:00
MCTargetDesc	bpf: introduce -mattr=dwarfris to disable DwarfUsesRelocationsAcrossSections	2018-03-01 23:04:59 +00:00
TargetInfo	Add backend name to Target to enable runtime info to be fed back into TableGen	2017-11-15 23:55:44 +00:00
BPF.h	bpf: New post-RA peephole optimization pass to eliminate bad RA codegen	2018-03-13 06:47:06 +00:00
BPF.td	bpf: introduce -mattr=dwarfris to disable DwarfUsesRelocationsAcrossSections	2018-03-01 23:04:59 +00:00
BPFAsmPrinter.cpp	bpf: add inline-asm support	2017-09-18 23:29:36 +00:00
BPFCallingConv.td	bpf: New calling convention for 32-bit subregisters	2018-02-23 23:49:23 +00:00
BPFFrameLowering.cpp
BPFFrameLowering.h	Move TargetFrameLowering.h to CodeGen where it's implemented	2017-11-03 22:32:11 +00:00
BPFInstrFormats.td	bpf: add new insns for bswap_to_le and negation	2017-09-28 02:46:11 +00:00
BPFInstrInfo.cpp	bpf: Support 32-bit subregister in various InstrInfo hooks	2018-02-23 23:49:29 +00:00
BPFInstrInfo.h	Target/TargetInstrInfo.h -> CodeGen/TargetInstrInfo.h to match layering	2017-11-08 01:01:31 +00:00
BPFInstrInfo.td	bpf: New instruction patterns for 32-bit subregister load and store	2018-02-23 23:49:28 +00:00
BPFISelDAGToDAG.cpp	Fix a bunch of typoes. NFC	2018-03-30 22:22:31 +00:00
BPFISelLowering.cpp	bpf: fix incorrect SELECT_CC lowering	2018-04-03 03:56:37 +00:00
BPFISelLowering.h	bpf: Support i32 in getScalarShiftAmountTy method	2018-02-23 23:49:26 +00:00
BPFMCInstLower.cpp	Cleanup dump() functions.	2017-01-28 02:02:38 +00:00
BPFMCInstLower.h	[bpf] error when unknown bpf helper is called	2017-01-17 07:26:17 +00:00
BPFMIPeephole.cpp	bpf: Enhance debug information for peephole optimization passes	2018-03-13 06:47:07 +00:00
BPFRegisterInfo.cpp	bpf: Use markSuperRegs to mark reserved registers	2018-02-23 23:49:18 +00:00
BPFRegisterInfo.h	[BPF] Return true in enableMultipleCopyHints().	2018-02-18 10:09:54 +00:00
BPFRegisterInfo.td	bpf: add 32bit register set	2017-09-22 04:36:35 +00:00
BPFSubtarget.cpp	bpf: introduce -mattr=dwarfris to disable DwarfUsesRelocationsAcrossSections	2018-03-01 23:04:59 +00:00
BPFSubtarget.h	bpf: introduce -mattr=dwarfris to disable DwarfUsesRelocationsAcrossSections	2018-03-01 23:04:59 +00:00
BPFTargetMachine.cpp	bpf: New post-RA peephole optimization pass to eliminate bad RA codegen	2018-03-13 06:47:06 +00:00
BPFTargetMachine.h	Revert "TargetMachine: Merge TargetMachine and LLVMTargetMachine"	2017-10-12 22:57:28 +00:00
CMakeLists.txt	Sort targetgen calls in lib/Target/*/CMakeLists.	2018-04-04 12:37:44 +00:00
LLVMBuild.txt	bpf: Add BPF AsmParser support in LLVM	2017-09-12 17:55:23 +00:00