xref: /freebsd/contrib/llvm-project/lld/ELF/Arch/AMDGPU.cpp (revision 0b57cec536236d46e3dba9bd041533462f33dbb7) 
1*0b57cec5SDimitry Andric //===- AMDGPU.cpp ---------------------------------------------------------===//
2*0b57cec5SDimitry Andric //
3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6*0b57cec5SDimitry Andric //
7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
8*0b57cec5SDimitry Andric 
9*0b57cec5SDimitry Andric #include "InputFiles.h"
10*0b57cec5SDimitry Andric #include "Symbols.h"
11*0b57cec5SDimitry Andric #include "Target.h"
12*0b57cec5SDimitry Andric #include "lld/Common/ErrorHandler.h"
13*0b57cec5SDimitry Andric #include "llvm/Object/ELF.h"
14*0b57cec5SDimitry Andric #include "llvm/Support/Endian.h"
15*0b57cec5SDimitry Andric 
16*0b57cec5SDimitry Andric using namespace llvm;
17*0b57cec5SDimitry Andric using namespace llvm::object;
18*0b57cec5SDimitry Andric using namespace llvm::support::endian;
19*0b57cec5SDimitry Andric using namespace llvm::ELF;
20*0b57cec5SDimitry Andric using namespace lld;
21*0b57cec5SDimitry Andric using namespace lld::elf;
22*0b57cec5SDimitry Andric 
23*0b57cec5SDimitry Andric namespace {
24*0b57cec5SDimitry Andric class AMDGPU final : public TargetInfo {
25*0b57cec5SDimitry Andric public:
26*0b57cec5SDimitry Andric   AMDGPU();
27*0b57cec5SDimitry Andric   uint32_t calcEFlags() const override;
28*0b57cec5SDimitry Andric   void relocateOne(uint8_t *loc, RelType type, uint64_t val) const override;
29*0b57cec5SDimitry Andric   RelExpr getRelExpr(RelType type, const Symbol &s,
30*0b57cec5SDimitry Andric                      const uint8_t *loc) const override;
31*0b57cec5SDimitry Andric   RelType getDynRel(RelType type) const override;
32*0b57cec5SDimitry Andric };
33*0b57cec5SDimitry Andric } // namespace
34*0b57cec5SDimitry Andric 
35*0b57cec5SDimitry Andric AMDGPU::AMDGPU() {
36*0b57cec5SDimitry Andric   relativeRel = R_AMDGPU_RELATIVE64;
37*0b57cec5SDimitry Andric   gotRel = R_AMDGPU_ABS64;
38*0b57cec5SDimitry Andric   noneRel = R_AMDGPU_NONE;
39*0b57cec5SDimitry Andric   symbolicRel = R_AMDGPU_ABS64;
40*0b57cec5SDimitry Andric }
41*0b57cec5SDimitry Andric 
42*0b57cec5SDimitry Andric static uint32_t getEFlags(InputFile *file) {
43*0b57cec5SDimitry Andric   return cast<ObjFile<ELF64LE>>(file)->getObj().getHeader()->e_flags;
44*0b57cec5SDimitry Andric }
45*0b57cec5SDimitry Andric 
46*0b57cec5SDimitry Andric uint32_t AMDGPU::calcEFlags() const {
47*0b57cec5SDimitry Andric   assert(!objectFiles.empty());
48*0b57cec5SDimitry Andric   uint32_t ret = getEFlags(objectFiles[0]);
49*0b57cec5SDimitry Andric 
50*0b57cec5SDimitry Andric   // Verify that all input files have the same e_flags.
51*0b57cec5SDimitry Andric   for (InputFile *f : makeArrayRef(objectFiles).slice(1)) {
52*0b57cec5SDimitry Andric     if (ret == getEFlags(f))
53*0b57cec5SDimitry Andric       continue;
54*0b57cec5SDimitry Andric     error("incompatible e_flags: " + toString(f));
55*0b57cec5SDimitry Andric     return 0;
56*0b57cec5SDimitry Andric   }
57*0b57cec5SDimitry Andric   return ret;
58*0b57cec5SDimitry Andric }
59*0b57cec5SDimitry Andric 
60*0b57cec5SDimitry Andric void AMDGPU::relocateOne(uint8_t *loc, RelType type, uint64_t val) const {
61*0b57cec5SDimitry Andric   switch (type) {
62*0b57cec5SDimitry Andric   case R_AMDGPU_ABS32:
63*0b57cec5SDimitry Andric   case R_AMDGPU_GOTPCREL:
64*0b57cec5SDimitry Andric   case R_AMDGPU_GOTPCREL32_LO:
65*0b57cec5SDimitry Andric   case R_AMDGPU_REL32:
66*0b57cec5SDimitry Andric   case R_AMDGPU_REL32_LO:
67*0b57cec5SDimitry Andric     write32le(loc, val);
68*0b57cec5SDimitry Andric     break;
69*0b57cec5SDimitry Andric   case R_AMDGPU_ABS64:
70*0b57cec5SDimitry Andric   case R_AMDGPU_REL64:
71*0b57cec5SDimitry Andric     write64le(loc, val);
72*0b57cec5SDimitry Andric     break;
73*0b57cec5SDimitry Andric   case R_AMDGPU_GOTPCREL32_HI:
74*0b57cec5SDimitry Andric   case R_AMDGPU_REL32_HI:
75*0b57cec5SDimitry Andric     write32le(loc, val >> 32);
76*0b57cec5SDimitry Andric     break;
77*0b57cec5SDimitry Andric   default:
78*0b57cec5SDimitry Andric     llvm_unreachable("unknown relocation");
79*0b57cec5SDimitry Andric   }
80*0b57cec5SDimitry Andric }
81*0b57cec5SDimitry Andric 
82*0b57cec5SDimitry Andric RelExpr AMDGPU::getRelExpr(RelType type, const Symbol &s,
83*0b57cec5SDimitry Andric                            const uint8_t *loc) const {
84*0b57cec5SDimitry Andric   switch (type) {
85*0b57cec5SDimitry Andric   case R_AMDGPU_ABS32:
86*0b57cec5SDimitry Andric   case R_AMDGPU_ABS64:
87*0b57cec5SDimitry Andric     return R_ABS;
88*0b57cec5SDimitry Andric   case R_AMDGPU_REL32:
89*0b57cec5SDimitry Andric   case R_AMDGPU_REL32_LO:
90*0b57cec5SDimitry Andric   case R_AMDGPU_REL32_HI:
91*0b57cec5SDimitry Andric   case R_AMDGPU_REL64:
92*0b57cec5SDimitry Andric     return R_PC;
93*0b57cec5SDimitry Andric   case R_AMDGPU_GOTPCREL:
94*0b57cec5SDimitry Andric   case R_AMDGPU_GOTPCREL32_LO:
95*0b57cec5SDimitry Andric   case R_AMDGPU_GOTPCREL32_HI:
96*0b57cec5SDimitry Andric     return R_GOT_PC;
97*0b57cec5SDimitry Andric   default:
98*0b57cec5SDimitry Andric     error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
99*0b57cec5SDimitry Andric           ") against symbol " + toString(s));
100*0b57cec5SDimitry Andric     return R_NONE;
101*0b57cec5SDimitry Andric   }
102*0b57cec5SDimitry Andric }
103*0b57cec5SDimitry Andric 
104*0b57cec5SDimitry Andric RelType AMDGPU::getDynRel(RelType type) const {
105*0b57cec5SDimitry Andric   if (type == R_AMDGPU_ABS64)
106*0b57cec5SDimitry Andric     return type;
107*0b57cec5SDimitry Andric   return R_AMDGPU_NONE;
108*0b57cec5SDimitry Andric }
109*0b57cec5SDimitry Andric 
110*0b57cec5SDimitry Andric TargetInfo *elf::getAMDGPUTargetInfo() {
111*0b57cec5SDimitry Andric   static AMDGPU target;
112*0b57cec5SDimitry Andric   return &target;
113*0b57cec5SDimitry Andric }
114