1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
| //===- SPARCV9.cpp --------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "InputFiles.h"
#include "Symbols.h"
#include "SyntheticSections.h"
#include "Target.h"
#include "lld/Common/ErrorHandler.h"
#include "llvm/Support/Endian.h"
using namespace llvm;
using namespace llvm::support::endian;
using namespace llvm::ELF;
namespace lld {
namespace elf {
namespace {
class SPARCV9 final : public TargetInfo {
public:
SPARCV9();
RelExpr getRelExpr(RelType type, const Symbol &s,
const uint8_t *loc) const override;
void writePlt(uint8_t *buf, uint64_t gotEntryAddr, uint64_t pltEntryAddr,
int32_t index, unsigned relOff) const override;
void relocateOne(uint8_t *loc, RelType type, uint64_t val) const override;
};
} // namespace
SPARCV9::SPARCV9() {
copyRel = R_SPARC_COPY;
gotRel = R_SPARC_GLOB_DAT;
noneRel = R_SPARC_NONE;
pltRel = R_SPARC_JMP_SLOT;
relativeRel = R_SPARC_RELATIVE;
symbolicRel = R_SPARC_64;
pltEntrySize = 32;
pltHeaderSize = 4 * pltEntrySize;
defaultCommonPageSize = 8192;
defaultMaxPageSize = 0x100000;
defaultImageBase = 0x100000;
}
RelExpr SPARCV9::getRelExpr(RelType type, const Symbol &s,
const uint8_t *loc) const {
switch (type) {
case R_SPARC_32:
case R_SPARC_UA32:
case R_SPARC_64:
case R_SPARC_UA64:
return R_ABS;
case R_SPARC_PC10:
case R_SPARC_PC22:
case R_SPARC_DISP32:
case R_SPARC_WDISP30:
return R_PC;
case R_SPARC_GOT10:
return R_GOT_OFF;
case R_SPARC_GOT22:
return R_GOT_OFF;
case R_SPARC_WPLT30:
return R_PLT_PC;
case R_SPARC_NONE:
return R_NONE;
default:
error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
") against symbol " + toString(s));
return R_NONE;
}
}
void SPARCV9::relocateOne(uint8_t *loc, RelType type, uint64_t val) const {
switch (type) {
case R_SPARC_32:
case R_SPARC_UA32:
// V-word32
checkUInt(loc, val, 32, type);
write32be(loc, val);
break;
case R_SPARC_DISP32:
// V-disp32
checkInt(loc, val, 32, type);
write32be(loc, val);
break;
case R_SPARC_WDISP30:
case R_SPARC_WPLT30:
// V-disp30
checkInt(loc, val, 32, type);
write32be(loc, (read32be(loc) & ~0x3fffffff) | ((val >> 2) & 0x3fffffff));
break;
case R_SPARC_22:
// V-imm22
checkUInt(loc, val, 22, type);
write32be(loc, (read32be(loc) & ~0x003fffff) | (val & 0x003fffff));
break;
case R_SPARC_GOT22:
case R_SPARC_PC22:
// T-imm22
write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 10) & 0x003fffff));
break;
case R_SPARC_WDISP19:
// V-disp19
checkInt(loc, val, 21, type);
write32be(loc, (read32be(loc) & ~0x0007ffff) | ((val >> 2) & 0x0007ffff));
break;
case R_SPARC_GOT10:
case R_SPARC_PC10:
// T-simm10
write32be(loc, (read32be(loc) & ~0x000003ff) | (val & 0x000003ff));
break;
case R_SPARC_64:
case R_SPARC_UA64:
// V-xword64
write64be(loc, val);
break;
default:
llvm_unreachable("unknown relocation");
}
}
void SPARCV9::writePlt(uint8_t *buf, uint64_t gotEntryAddr,
uint64_t pltEntryAddr, int32_t index,
unsigned relOff) const {
const uint8_t pltData[] = {
0x03, 0x00, 0x00, 0x00, // sethi (. - .PLT0), %g1
0x30, 0x68, 0x00, 0x00, // ba,a %xcc, .PLT1
0x01, 0x00, 0x00, 0x00, // nop
0x01, 0x00, 0x00, 0x00, // nop
0x01, 0x00, 0x00, 0x00, // nop
0x01, 0x00, 0x00, 0x00, // nop
0x01, 0x00, 0x00, 0x00, // nop
0x01, 0x00, 0x00, 0x00 // nop
};
memcpy(buf, pltData, sizeof(pltData));
uint64_t off = pltHeaderSize + pltEntrySize * index;
relocateOne(buf, R_SPARC_22, off);
relocateOne(buf + 4, R_SPARC_WDISP19, -(off + 4 - pltEntrySize));
}
TargetInfo *getSPARCV9TargetInfo() {
static SPARCV9 target;
return ⌖
}
} // namespace elf
} // namespace lld
|