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llvm-project/llvm/lib/Target/BPF/BTF.def

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[BPF] Generate BTF DebugInfo under BPF target This patch implements BTF (BPF Type Format). The BTF is the debug info format for BPF, introduced in the below linux patch: https://github.com/torvalds/linux/commit/69b693f0aefa0ed521e8bd02260523b5ae446ad7#diff-06fb1c8825f653d7e539058b72c83332 and further extended several times, e.g., https://www.spinics.net/lists/netdev/msg534640.html https://www.spinics.net/lists/netdev/msg538464.html https://www.spinics.net/lists/netdev/msg540246.html The main advantage of implementing in LLVM is: . better integration/deployment as no extra tools are needed. . bpf JIT based compilation (like bcc, bpftrace, etc.) can get BTF without much extra effort. . BTF line_info needs selective source codes, which can be easily retrieved when inside the compiler. This patch implemented BTF generation by registering a BPF specific DebugHandler in BPFAsmPrinter. Signed-off-by: Yonghong Song <yhs@fb.com> Differential Revision: https://reviews.llvm.org/D55752 llvm-svn: 349640
2018-12-20 00:40:25 +08:00
//===- BTF.def - BTF definitions --------------------------------*- C++ -*-===//
//
Update the file headers across all of the LLVM projects in the monorepo to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
2019-01-19 16:50:56 +08:00
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
[BPF] Generate BTF DebugInfo under BPF target This patch implements BTF (BPF Type Format). The BTF is the debug info format for BPF, introduced in the below linux patch: https://github.com/torvalds/linux/commit/69b693f0aefa0ed521e8bd02260523b5ae446ad7#diff-06fb1c8825f653d7e539058b72c83332 and further extended several times, e.g., https://www.spinics.net/lists/netdev/msg534640.html https://www.spinics.net/lists/netdev/msg538464.html https://www.spinics.net/lists/netdev/msg540246.html The main advantage of implementing in LLVM is: . better integration/deployment as no extra tools are needed. . bpf JIT based compilation (like bcc, bpftrace, etc.) can get BTF without much extra effort. . BTF line_info needs selective source codes, which can be easily retrieved when inside the compiler. This patch implemented BTF generation by registering a BPF specific DebugHandler in BPFAsmPrinter. Signed-off-by: Yonghong Song <yhs@fb.com> Differential Revision: https://reviews.llvm.org/D55752 llvm-svn: 349640
2018-12-20 00:40:25 +08:00
//
//===----------------------------------------------------------------------===//
//
// Macros for BTF.
//
//===----------------------------------------------------------------------===//
#if !defined(HANDLE_BTF_KIND)
#error "Missing macro definition of HANDLE_BTF_*"
#endif
HANDLE_BTF_KIND(0, UNKN)
HANDLE_BTF_KIND(1, INT)
HANDLE_BTF_KIND(2, PTR)
HANDLE_BTF_KIND(3, ARRAY)
HANDLE_BTF_KIND(4, STRUCT)
HANDLE_BTF_KIND(5, UNION)
HANDLE_BTF_KIND(6, ENUM)
HANDLE_BTF_KIND(7, FWD)
HANDLE_BTF_KIND(8, TYPEDEF)
HANDLE_BTF_KIND(9, VOLATILE)
HANDLE_BTF_KIND(10, CONST)
HANDLE_BTF_KIND(11, RESTRICT)
HANDLE_BTF_KIND(12, FUNC)
HANDLE_BTF_KIND(13, FUNC_PROTO)
#undef HANDLE_BTF_KIND