1 //===-- RISCVMCExpr.cpp - RISC-V specific MC expression classes -----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains the implementation of the assembly expression modifiers
10 // accepted by the RISC-V architecture (e.g. ":lo12:", ":gottprel_g1:", ...).
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "MCTargetDesc/RISCVAsmBackend.h"
15 #include "MCTargetDesc/RISCVMCAsmInfo.h"
16 #include "RISCVFixupKinds.h"
17 #include "llvm/BinaryFormat/ELF.h"
18 #include "llvm/MC/MCAssembler.h"
19 #include "llvm/MC/MCContext.h"
20 #include "llvm/MC/MCStreamer.h"
21 #include "llvm/MC/MCValue.h"
22 #include "llvm/Support/Casting.h"
23 #include "llvm/Support/ErrorHandling.h"
24
25 using namespace llvm;
26
27 #define DEBUG_TYPE "riscvmcexpr"
28
parseSpecifierName(StringRef name)29 RISCV::Specifier RISCV::parseSpecifierName(StringRef name) {
30 return StringSwitch<RISCV::Specifier>(name)
31 .Case("lo", RISCV::S_LO)
32 .Case("hi", ELF::R_RISCV_HI20)
33 .Case("pcrel_lo", RISCV::S_PCREL_LO)
34 .Case("pcrel_hi", ELF::R_RISCV_PCREL_HI20)
35 .Case("got_pcrel_hi", ELF::R_RISCV_GOT_HI20)
36 .Case("tprel_lo", RISCV::S_TPREL_LO)
37 .Case("tprel_hi", ELF::R_RISCV_TPREL_HI20)
38 .Case("tprel_add", ELF::R_RISCV_TPREL_ADD)
39 .Case("tls_ie_pcrel_hi", ELF::R_RISCV_TLS_GOT_HI20)
40 .Case("tls_gd_pcrel_hi", ELF::R_RISCV_TLS_GD_HI20)
41 .Case("tlsdesc_hi", ELF::R_RISCV_TLSDESC_HI20)
42 .Case("tlsdesc_load_lo", ELF::R_RISCV_TLSDESC_LOAD_LO12)
43 .Case("tlsdesc_add_lo", ELF::R_RISCV_TLSDESC_ADD_LO12)
44 .Case("tlsdesc_call", ELF::R_RISCV_TLSDESC_CALL)
45 .Case("qc.abs20", RISCV::S_QC_ABS20)
46 // Used in data directives
47 .Case("pltpcrel", ELF::R_RISCV_PLT32)
48 .Case("gotpcrel", ELF::R_RISCV_GOT32_PCREL)
49 .Default(0);
50 }
51
getSpecifierName(Specifier S)52 StringRef RISCV::getSpecifierName(Specifier S) {
53 switch (S) {
54 case RISCV::S_None:
55 llvm_unreachable("not used as %specifier()");
56 case RISCV::S_LO:
57 return "lo";
58 case ELF::R_RISCV_HI20:
59 return "hi";
60 case RISCV::S_PCREL_LO:
61 return "pcrel_lo";
62 case ELF::R_RISCV_PCREL_HI20:
63 return "pcrel_hi";
64 case ELF::R_RISCV_GOT_HI20:
65 return "got_pcrel_hi";
66 case RISCV::S_TPREL_LO:
67 return "tprel_lo";
68 case ELF::R_RISCV_TPREL_HI20:
69 return "tprel_hi";
70 case ELF::R_RISCV_TPREL_ADD:
71 return "tprel_add";
72 case ELF::R_RISCV_TLS_GOT_HI20:
73 return "tls_ie_pcrel_hi";
74 case ELF::R_RISCV_TLSDESC_HI20:
75 return "tlsdesc_hi";
76 case ELF::R_RISCV_TLSDESC_LOAD_LO12:
77 return "tlsdesc_load_lo";
78 case ELF::R_RISCV_TLSDESC_ADD_LO12:
79 return "tlsdesc_add_lo";
80 case ELF::R_RISCV_TLSDESC_CALL:
81 return "tlsdesc_call";
82 case ELF::R_RISCV_TLS_GD_HI20:
83 return "tls_gd_pcrel_hi";
84 case ELF::R_RISCV_CALL_PLT:
85 return "call_plt";
86 case ELF::R_RISCV_32_PCREL:
87 return "32_pcrel";
88 case ELF::R_RISCV_GOT32_PCREL:
89 return "gotpcrel";
90 case ELF::R_RISCV_PLT32:
91 return "pltpcrel";
92 case RISCV::S_QC_ABS20:
93 return "qc.abs20";
94 }
95 llvm_unreachable("Invalid ELF symbol kind");
96 }
97