10b57cec5SDimitry Andric //===-- Hexagon.cpp -------------------------------------------------------===//
20b57cec5SDimitry Andric //
30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
60b57cec5SDimitry Andric //
70b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
80b57cec5SDimitry Andric
90b57cec5SDimitry Andric #include "InputFiles.h"
100b57cec5SDimitry Andric #include "Symbols.h"
110b57cec5SDimitry Andric #include "SyntheticSections.h"
120b57cec5SDimitry Andric #include "Target.h"
130b57cec5SDimitry Andric #include "lld/Common/ErrorHandler.h"
140b57cec5SDimitry Andric #include "llvm/BinaryFormat/ELF.h"
150b57cec5SDimitry Andric #include "llvm/Support/Endian.h"
160b57cec5SDimitry Andric
170b57cec5SDimitry Andric using namespace llvm;
180b57cec5SDimitry Andric using namespace llvm::object;
190b57cec5SDimitry Andric using namespace llvm::support::endian;
200b57cec5SDimitry Andric using namespace llvm::ELF;
215ffd83dbSDimitry Andric using namespace lld;
225ffd83dbSDimitry Andric using namespace lld::elf;
230b57cec5SDimitry Andric
240b57cec5SDimitry Andric namespace {
250b57cec5SDimitry Andric class Hexagon final : public TargetInfo {
260b57cec5SDimitry Andric public:
270b57cec5SDimitry Andric Hexagon();
280b57cec5SDimitry Andric uint32_t calcEFlags() const override;
290b57cec5SDimitry Andric RelExpr getRelExpr(RelType type, const Symbol &s,
300b57cec5SDimitry Andric const uint8_t *loc) const override;
3185868e8aSDimitry Andric RelType getDynRel(RelType type) const override;
325f757f3fSDimitry Andric int64_t getImplicitAddend(const uint8_t *buf, RelType type) const override;
335ffd83dbSDimitry Andric void relocate(uint8_t *loc, const Relocation &rel,
345ffd83dbSDimitry Andric uint64_t val) const override;
350b57cec5SDimitry Andric void writePltHeader(uint8_t *buf) const override;
36480093f4SDimitry Andric void writePlt(uint8_t *buf, const Symbol &sym,
37480093f4SDimitry Andric uint64_t pltEntryAddr) const override;
380b57cec5SDimitry Andric };
390b57cec5SDimitry Andric } // namespace
400b57cec5SDimitry Andric
Hexagon()410b57cec5SDimitry Andric Hexagon::Hexagon() {
420b57cec5SDimitry Andric pltRel = R_HEX_JMP_SLOT;
430b57cec5SDimitry Andric relativeRel = R_HEX_RELATIVE;
440b57cec5SDimitry Andric gotRel = R_HEX_GLOB_DAT;
450b57cec5SDimitry Andric symbolicRel = R_HEX_32;
460b57cec5SDimitry Andric
47349cc55cSDimitry Andric gotBaseSymInGotPlt = true;
480b57cec5SDimitry Andric // The zero'th GOT entry is reserved for the address of _DYNAMIC. The
490b57cec5SDimitry Andric // next 3 are reserved for the dynamic loader.
500b57cec5SDimitry Andric gotPltHeaderEntriesNum = 4;
510b57cec5SDimitry Andric
520b57cec5SDimitry Andric pltEntrySize = 16;
530b57cec5SDimitry Andric pltHeaderSize = 32;
540b57cec5SDimitry Andric
550b57cec5SDimitry Andric // Hexagon Linux uses 64K pages by default.
560b57cec5SDimitry Andric defaultMaxPageSize = 0x10000;
57480093f4SDimitry Andric tlsGotRel = R_HEX_TPREL_32;
585ffd83dbSDimitry Andric tlsModuleIndexRel = R_HEX_DTPMOD_32;
595ffd83dbSDimitry Andric tlsOffsetRel = R_HEX_DTPREL_32;
600b57cec5SDimitry Andric }
610b57cec5SDimitry Andric
calcEFlags() const620b57cec5SDimitry Andric uint32_t Hexagon::calcEFlags() const {
63bdd1243dSDimitry Andric assert(!ctx.objectFiles.empty());
640b57cec5SDimitry Andric
650b57cec5SDimitry Andric // The architecture revision must always be equal to or greater than
660b57cec5SDimitry Andric // greatest revision in the list of inputs.
670b57cec5SDimitry Andric uint32_t ret = 0;
68bdd1243dSDimitry Andric for (InputFile *f : ctx.objectFiles) {
69e8d8bef9SDimitry Andric uint32_t eflags = cast<ObjFile<ELF32LE>>(f)->getObj().getHeader().e_flags;
700b57cec5SDimitry Andric if (eflags > ret)
710b57cec5SDimitry Andric ret = eflags;
720b57cec5SDimitry Andric }
730b57cec5SDimitry Andric return ret;
740b57cec5SDimitry Andric }
750b57cec5SDimitry Andric
applyMask(uint32_t mask,uint32_t data)760b57cec5SDimitry Andric static uint32_t applyMask(uint32_t mask, uint32_t data) {
770b57cec5SDimitry Andric uint32_t result = 0;
780b57cec5SDimitry Andric size_t off = 0;
790b57cec5SDimitry Andric
800b57cec5SDimitry Andric for (size_t bit = 0; bit != 32; ++bit) {
810b57cec5SDimitry Andric uint32_t valBit = (data >> off) & 1;
820b57cec5SDimitry Andric uint32_t maskBit = (mask >> bit) & 1;
830b57cec5SDimitry Andric if (maskBit) {
840b57cec5SDimitry Andric result |= (valBit << bit);
850b57cec5SDimitry Andric ++off;
860b57cec5SDimitry Andric }
870b57cec5SDimitry Andric }
880b57cec5SDimitry Andric return result;
890b57cec5SDimitry Andric }
900b57cec5SDimitry Andric
getRelExpr(RelType type,const Symbol & s,const uint8_t * loc) const910b57cec5SDimitry Andric RelExpr Hexagon::getRelExpr(RelType type, const Symbol &s,
920b57cec5SDimitry Andric const uint8_t *loc) const {
930b57cec5SDimitry Andric switch (type) {
9485868e8aSDimitry Andric case R_HEX_NONE:
9585868e8aSDimitry Andric return R_NONE;
9685868e8aSDimitry Andric case R_HEX_6_X:
9785868e8aSDimitry Andric case R_HEX_8_X:
9885868e8aSDimitry Andric case R_HEX_9_X:
9985868e8aSDimitry Andric case R_HEX_10_X:
10085868e8aSDimitry Andric case R_HEX_11_X:
10185868e8aSDimitry Andric case R_HEX_12_X:
10285868e8aSDimitry Andric case R_HEX_16_X:
10385868e8aSDimitry Andric case R_HEX_32:
10485868e8aSDimitry Andric case R_HEX_32_6_X:
10585868e8aSDimitry Andric case R_HEX_HI16:
10685868e8aSDimitry Andric case R_HEX_LO16:
1075ffd83dbSDimitry Andric case R_HEX_DTPREL_32:
10885868e8aSDimitry Andric return R_ABS;
1090b57cec5SDimitry Andric case R_HEX_B9_PCREL:
1100b57cec5SDimitry Andric case R_HEX_B13_PCREL:
1110b57cec5SDimitry Andric case R_HEX_B15_PCREL:
1120b57cec5SDimitry Andric case R_HEX_6_PCREL_X:
1130b57cec5SDimitry Andric case R_HEX_32_PCREL:
1140b57cec5SDimitry Andric return R_PC;
11585868e8aSDimitry Andric case R_HEX_B9_PCREL_X:
11685868e8aSDimitry Andric case R_HEX_B15_PCREL_X:
1170b57cec5SDimitry Andric case R_HEX_B22_PCREL:
1180b57cec5SDimitry Andric case R_HEX_PLT_B22_PCREL:
1190b57cec5SDimitry Andric case R_HEX_B22_PCREL_X:
1200b57cec5SDimitry Andric case R_HEX_B32_PCREL_X:
1215ffd83dbSDimitry Andric case R_HEX_GD_PLT_B22_PCREL:
1225ffd83dbSDimitry Andric case R_HEX_GD_PLT_B22_PCREL_X:
1235ffd83dbSDimitry Andric case R_HEX_GD_PLT_B32_PCREL_X:
1240b57cec5SDimitry Andric return R_PLT_PC;
125480093f4SDimitry Andric case R_HEX_IE_32_6_X:
126480093f4SDimitry Andric case R_HEX_IE_16_X:
127480093f4SDimitry Andric case R_HEX_IE_HI16:
128480093f4SDimitry Andric case R_HEX_IE_LO16:
129480093f4SDimitry Andric return R_GOT;
1305ffd83dbSDimitry Andric case R_HEX_GD_GOT_11_X:
1315ffd83dbSDimitry Andric case R_HEX_GD_GOT_16_X:
1325ffd83dbSDimitry Andric case R_HEX_GD_GOT_32_6_X:
1335ffd83dbSDimitry Andric return R_TLSGD_GOTPLT;
13485868e8aSDimitry Andric case R_HEX_GOTREL_11_X:
13585868e8aSDimitry Andric case R_HEX_GOTREL_16_X:
13685868e8aSDimitry Andric case R_HEX_GOTREL_32_6_X:
13785868e8aSDimitry Andric case R_HEX_GOTREL_HI16:
13885868e8aSDimitry Andric case R_HEX_GOTREL_LO16:
13985868e8aSDimitry Andric return R_GOTPLTREL;
1400b57cec5SDimitry Andric case R_HEX_GOT_11_X:
1410b57cec5SDimitry Andric case R_HEX_GOT_16_X:
1420b57cec5SDimitry Andric case R_HEX_GOT_32_6_X:
14385868e8aSDimitry Andric return R_GOTPLT;
144480093f4SDimitry Andric case R_HEX_IE_GOT_11_X:
145480093f4SDimitry Andric case R_HEX_IE_GOT_16_X:
146480093f4SDimitry Andric case R_HEX_IE_GOT_32_6_X:
147480093f4SDimitry Andric case R_HEX_IE_GOT_HI16:
148480093f4SDimitry Andric case R_HEX_IE_GOT_LO16:
149480093f4SDimitry Andric return R_GOTPLT;
150480093f4SDimitry Andric case R_HEX_TPREL_11_X:
151480093f4SDimitry Andric case R_HEX_TPREL_16:
152480093f4SDimitry Andric case R_HEX_TPREL_16_X:
153480093f4SDimitry Andric case R_HEX_TPREL_32_6_X:
154480093f4SDimitry Andric case R_HEX_TPREL_HI16:
155480093f4SDimitry Andric case R_HEX_TPREL_LO16:
156e8d8bef9SDimitry Andric return R_TPREL;
1570b57cec5SDimitry Andric default:
15885868e8aSDimitry Andric error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
15985868e8aSDimitry Andric ") against symbol " + toString(s));
16085868e8aSDimitry Andric return R_NONE;
1610b57cec5SDimitry Andric }
1620b57cec5SDimitry Andric }
1630b57cec5SDimitry Andric
1640b57cec5SDimitry Andric // There are (arguably too) many relocation masks for the DSP's
1650b57cec5SDimitry Andric // R_HEX_6_X type. The table below is used to select the correct mask
1660b57cec5SDimitry Andric // for the given instruction.
1670b57cec5SDimitry Andric struct InstructionMask {
1680b57cec5SDimitry Andric uint32_t cmpMask;
1690b57cec5SDimitry Andric uint32_t relocMask;
1700b57cec5SDimitry Andric };
1710b57cec5SDimitry Andric static const InstructionMask r6[] = {
1720b57cec5SDimitry Andric {0x38000000, 0x0000201f}, {0x39000000, 0x0000201f},
1730b57cec5SDimitry Andric {0x3e000000, 0x00001f80}, {0x3f000000, 0x00001f80},
1740b57cec5SDimitry Andric {0x40000000, 0x000020f8}, {0x41000000, 0x000007e0},
1750b57cec5SDimitry Andric {0x42000000, 0x000020f8}, {0x43000000, 0x000007e0},
1760b57cec5SDimitry Andric {0x44000000, 0x000020f8}, {0x45000000, 0x000007e0},
1770b57cec5SDimitry Andric {0x46000000, 0x000020f8}, {0x47000000, 0x000007e0},
1780b57cec5SDimitry Andric {0x6a000000, 0x00001f80}, {0x7c000000, 0x001f2000},
1790b57cec5SDimitry Andric {0x9a000000, 0x00000f60}, {0x9b000000, 0x00000f60},
1800b57cec5SDimitry Andric {0x9c000000, 0x00000f60}, {0x9d000000, 0x00000f60},
1810b57cec5SDimitry Andric {0x9f000000, 0x001f0100}, {0xab000000, 0x0000003f},
1820b57cec5SDimitry Andric {0xad000000, 0x0000003f}, {0xaf000000, 0x00030078},
1830b57cec5SDimitry Andric {0xd7000000, 0x006020e0}, {0xd8000000, 0x006020e0},
1840b57cec5SDimitry Andric {0xdb000000, 0x006020e0}, {0xdf000000, 0x006020e0}};
1850b57cec5SDimitry Andric
isDuplex(uint32_t insn)186349cc55cSDimitry Andric static bool isDuplex(uint32_t insn) {
187349cc55cSDimitry Andric // Duplex forms have a fixed mask and parse bits 15:14 are always
188349cc55cSDimitry Andric // zero. Non-duplex insns will always have at least one bit set in the
189349cc55cSDimitry Andric // parse field.
190349cc55cSDimitry Andric return (0xC000 & insn) == 0;
191349cc55cSDimitry Andric }
192349cc55cSDimitry Andric
findMaskR6(uint32_t insn)193349cc55cSDimitry Andric static uint32_t findMaskR6(uint32_t insn) {
1945ffd83dbSDimitry Andric if (isDuplex(insn))
1950b57cec5SDimitry Andric return 0x03f00000;
1960b57cec5SDimitry Andric
1970b57cec5SDimitry Andric for (InstructionMask i : r6)
1980b57cec5SDimitry Andric if ((0xff000000 & insn) == i.cmpMask)
1990b57cec5SDimitry Andric return i.relocMask;
2000b57cec5SDimitry Andric
201349cc55cSDimitry Andric error("unrecognized instruction for 6_X relocation: 0x" +
2020b57cec5SDimitry Andric utohexstr(insn));
2030b57cec5SDimitry Andric return 0;
2040b57cec5SDimitry Andric }
2050b57cec5SDimitry Andric
findMaskR8(uint32_t insn)2060b57cec5SDimitry Andric static uint32_t findMaskR8(uint32_t insn) {
2070b57cec5SDimitry Andric if ((0xff000000 & insn) == 0xde000000)
2080b57cec5SDimitry Andric return 0x00e020e8;
2090b57cec5SDimitry Andric if ((0xff000000 & insn) == 0x3c000000)
2100b57cec5SDimitry Andric return 0x0000207f;
2110b57cec5SDimitry Andric return 0x00001fe0;
2120b57cec5SDimitry Andric }
2130b57cec5SDimitry Andric
findMaskR11(uint32_t insn)2140b57cec5SDimitry Andric static uint32_t findMaskR11(uint32_t insn) {
2150b57cec5SDimitry Andric if ((0xff000000 & insn) == 0xa1000000)
2160b57cec5SDimitry Andric return 0x060020ff;
2170b57cec5SDimitry Andric return 0x06003fe0;
2180b57cec5SDimitry Andric }
2190b57cec5SDimitry Andric
findMaskR16(uint32_t insn)2200b57cec5SDimitry Andric static uint32_t findMaskR16(uint32_t insn) {
2210b57cec5SDimitry Andric if ((0xff000000 & insn) == 0x48000000)
2220b57cec5SDimitry Andric return 0x061f20ff;
2230b57cec5SDimitry Andric if ((0xff000000 & insn) == 0x49000000)
2240b57cec5SDimitry Andric return 0x061f3fe0;
2250b57cec5SDimitry Andric if ((0xff000000 & insn) == 0x78000000)
2260b57cec5SDimitry Andric return 0x00df3fe0;
2270b57cec5SDimitry Andric if ((0xff000000 & insn) == 0xb0000000)
2280b57cec5SDimitry Andric return 0x0fe03fe0;
2290b57cec5SDimitry Andric
2305ffd83dbSDimitry Andric if (isDuplex(insn))
2315ffd83dbSDimitry Andric return 0x03f00000;
2325ffd83dbSDimitry Andric
233349cc55cSDimitry Andric for (InstructionMask i : r6)
234349cc55cSDimitry Andric if ((0xff000000 & insn) == i.cmpMask)
235349cc55cSDimitry Andric return i.relocMask;
236349cc55cSDimitry Andric
237349cc55cSDimitry Andric error("unrecognized instruction for 16_X type: 0x" +
2380b57cec5SDimitry Andric utohexstr(insn));
2390b57cec5SDimitry Andric return 0;
2400b57cec5SDimitry Andric }
2410b57cec5SDimitry Andric
or32le(uint8_t * p,int32_t v)2420b57cec5SDimitry Andric static void or32le(uint8_t *p, int32_t v) { write32le(p, read32le(p) | v); }
2430b57cec5SDimitry Andric
relocate(uint8_t * loc,const Relocation & rel,uint64_t val) const2445ffd83dbSDimitry Andric void Hexagon::relocate(uint8_t *loc, const Relocation &rel,
2455ffd83dbSDimitry Andric uint64_t val) const {
2465ffd83dbSDimitry Andric switch (rel.type) {
2470b57cec5SDimitry Andric case R_HEX_NONE:
2480b57cec5SDimitry Andric break;
2490b57cec5SDimitry Andric case R_HEX_6_PCREL_X:
2500b57cec5SDimitry Andric case R_HEX_6_X:
2510b57cec5SDimitry Andric or32le(loc, applyMask(findMaskR6(read32le(loc)), val));
2520b57cec5SDimitry Andric break;
2530b57cec5SDimitry Andric case R_HEX_8_X:
2540b57cec5SDimitry Andric or32le(loc, applyMask(findMaskR8(read32le(loc)), val));
2550b57cec5SDimitry Andric break;
2560b57cec5SDimitry Andric case R_HEX_9_X:
2570b57cec5SDimitry Andric or32le(loc, applyMask(0x00003fe0, val & 0x3f));
2580b57cec5SDimitry Andric break;
2590b57cec5SDimitry Andric case R_HEX_10_X:
2600b57cec5SDimitry Andric or32le(loc, applyMask(0x00203fe0, val & 0x3f));
2610b57cec5SDimitry Andric break;
2620b57cec5SDimitry Andric case R_HEX_11_X:
2635ffd83dbSDimitry Andric case R_HEX_GD_GOT_11_X:
264480093f4SDimitry Andric case R_HEX_IE_GOT_11_X:
2650b57cec5SDimitry Andric case R_HEX_GOT_11_X:
26685868e8aSDimitry Andric case R_HEX_GOTREL_11_X:
267480093f4SDimitry Andric case R_HEX_TPREL_11_X:
2680b57cec5SDimitry Andric or32le(loc, applyMask(findMaskR11(read32le(loc)), val & 0x3f));
2690b57cec5SDimitry Andric break;
2700b57cec5SDimitry Andric case R_HEX_12_X:
2710b57cec5SDimitry Andric or32le(loc, applyMask(0x000007e0, val));
2720b57cec5SDimitry Andric break;
2730b57cec5SDimitry Andric case R_HEX_16_X: // These relocs only have 6 effective bits.
274480093f4SDimitry Andric case R_HEX_IE_16_X:
275480093f4SDimitry Andric case R_HEX_IE_GOT_16_X:
2765ffd83dbSDimitry Andric case R_HEX_GD_GOT_16_X:
2770b57cec5SDimitry Andric case R_HEX_GOT_16_X:
27885868e8aSDimitry Andric case R_HEX_GOTREL_16_X:
279480093f4SDimitry Andric case R_HEX_TPREL_16_X:
2800b57cec5SDimitry Andric or32le(loc, applyMask(findMaskR16(read32le(loc)), val & 0x3f));
2810b57cec5SDimitry Andric break;
282480093f4SDimitry Andric case R_HEX_TPREL_16:
283480093f4SDimitry Andric or32le(loc, applyMask(findMaskR16(read32le(loc)), val & 0xffff));
284480093f4SDimitry Andric break;
2850b57cec5SDimitry Andric case R_HEX_32:
2860b57cec5SDimitry Andric case R_HEX_32_PCREL:
2875ffd83dbSDimitry Andric case R_HEX_DTPREL_32:
2880b57cec5SDimitry Andric or32le(loc, val);
2890b57cec5SDimitry Andric break;
2900b57cec5SDimitry Andric case R_HEX_32_6_X:
2915ffd83dbSDimitry Andric case R_HEX_GD_GOT_32_6_X:
2920b57cec5SDimitry Andric case R_HEX_GOT_32_6_X:
29385868e8aSDimitry Andric case R_HEX_GOTREL_32_6_X:
294480093f4SDimitry Andric case R_HEX_IE_GOT_32_6_X:
295480093f4SDimitry Andric case R_HEX_IE_32_6_X:
296480093f4SDimitry Andric case R_HEX_TPREL_32_6_X:
2970b57cec5SDimitry Andric or32le(loc, applyMask(0x0fff3fff, val >> 6));
2980b57cec5SDimitry Andric break;
2990b57cec5SDimitry Andric case R_HEX_B9_PCREL:
3005ffd83dbSDimitry Andric checkInt(loc, val, 11, rel);
3010b57cec5SDimitry Andric or32le(loc, applyMask(0x003000fe, val >> 2));
3020b57cec5SDimitry Andric break;
3030b57cec5SDimitry Andric case R_HEX_B9_PCREL_X:
3040b57cec5SDimitry Andric or32le(loc, applyMask(0x003000fe, val & 0x3f));
3050b57cec5SDimitry Andric break;
3060b57cec5SDimitry Andric case R_HEX_B13_PCREL:
3075ffd83dbSDimitry Andric checkInt(loc, val, 15, rel);
3080b57cec5SDimitry Andric or32le(loc, applyMask(0x00202ffe, val >> 2));
3090b57cec5SDimitry Andric break;
3100b57cec5SDimitry Andric case R_HEX_B15_PCREL:
3115ffd83dbSDimitry Andric checkInt(loc, val, 17, rel);
3120b57cec5SDimitry Andric or32le(loc, applyMask(0x00df20fe, val >> 2));
3130b57cec5SDimitry Andric break;
3140b57cec5SDimitry Andric case R_HEX_B15_PCREL_X:
3150b57cec5SDimitry Andric or32le(loc, applyMask(0x00df20fe, val & 0x3f));
3160b57cec5SDimitry Andric break;
3170b57cec5SDimitry Andric case R_HEX_B22_PCREL:
3185ffd83dbSDimitry Andric case R_HEX_GD_PLT_B22_PCREL:
3190b57cec5SDimitry Andric case R_HEX_PLT_B22_PCREL:
3205ffd83dbSDimitry Andric checkInt(loc, val, 22, rel);
3210b57cec5SDimitry Andric or32le(loc, applyMask(0x1ff3ffe, val >> 2));
3220b57cec5SDimitry Andric break;
3230b57cec5SDimitry Andric case R_HEX_B22_PCREL_X:
3245ffd83dbSDimitry Andric case R_HEX_GD_PLT_B22_PCREL_X:
3250b57cec5SDimitry Andric or32le(loc, applyMask(0x1ff3ffe, val & 0x3f));
3260b57cec5SDimitry Andric break;
3270b57cec5SDimitry Andric case R_HEX_B32_PCREL_X:
3285ffd83dbSDimitry Andric case R_HEX_GD_PLT_B32_PCREL_X:
3290b57cec5SDimitry Andric or32le(loc, applyMask(0x0fff3fff, val >> 6));
3300b57cec5SDimitry Andric break;
33185868e8aSDimitry Andric case R_HEX_GOTREL_HI16:
3320b57cec5SDimitry Andric case R_HEX_HI16:
333480093f4SDimitry Andric case R_HEX_IE_GOT_HI16:
334480093f4SDimitry Andric case R_HEX_IE_HI16:
335480093f4SDimitry Andric case R_HEX_TPREL_HI16:
3360b57cec5SDimitry Andric or32le(loc, applyMask(0x00c03fff, val >> 16));
3370b57cec5SDimitry Andric break;
33885868e8aSDimitry Andric case R_HEX_GOTREL_LO16:
3390b57cec5SDimitry Andric case R_HEX_LO16:
340480093f4SDimitry Andric case R_HEX_IE_GOT_LO16:
341480093f4SDimitry Andric case R_HEX_IE_LO16:
342480093f4SDimitry Andric case R_HEX_TPREL_LO16:
3430b57cec5SDimitry Andric or32le(loc, applyMask(0x00c03fff, val));
3440b57cec5SDimitry Andric break;
3450b57cec5SDimitry Andric default:
34685868e8aSDimitry Andric llvm_unreachable("unknown relocation");
3470b57cec5SDimitry Andric }
3480b57cec5SDimitry Andric }
3490b57cec5SDimitry Andric
writePltHeader(uint8_t * buf) const3500b57cec5SDimitry Andric void Hexagon::writePltHeader(uint8_t *buf) const {
3510b57cec5SDimitry Andric const uint8_t pltData[] = {
3520b57cec5SDimitry Andric 0x00, 0x40, 0x00, 0x00, // { immext (#0)
3530b57cec5SDimitry Andric 0x1c, 0xc0, 0x49, 0x6a, // r28 = add (pc, ##GOT0@PCREL) } # @GOT0
3540b57cec5SDimitry Andric 0x0e, 0x42, 0x9c, 0xe2, // { r14 -= add (r28, #16) # offset of GOTn
3550b57cec5SDimitry Andric 0x4f, 0x40, 0x9c, 0x91, // r15 = memw (r28 + #8) # object ID at GOT2
3560b57cec5SDimitry Andric 0x3c, 0xc0, 0x9c, 0x91, // r28 = memw (r28 + #4) }# dynamic link at GOT1
3570b57cec5SDimitry Andric 0x0e, 0x42, 0x0e, 0x8c, // { r14 = asr (r14, #2) # index of PLTn
3580b57cec5SDimitry Andric 0x00, 0xc0, 0x9c, 0x52, // jumpr r28 } # call dynamic linker
3590b57cec5SDimitry Andric 0x0c, 0xdb, 0x00, 0x54, // trap0(#0xdb) # bring plt0 into 16byte alignment
3600b57cec5SDimitry Andric };
3610b57cec5SDimitry Andric memcpy(buf, pltData, sizeof(pltData));
3620b57cec5SDimitry Andric
3630b57cec5SDimitry Andric // Offset from PLT0 to the GOT.
3640b57cec5SDimitry Andric uint64_t off = in.gotPlt->getVA() - in.plt->getVA();
3655ffd83dbSDimitry Andric relocateNoSym(buf, R_HEX_B32_PCREL_X, off);
3665ffd83dbSDimitry Andric relocateNoSym(buf + 4, R_HEX_6_PCREL_X, off);
3670b57cec5SDimitry Andric }
3680b57cec5SDimitry Andric
writePlt(uint8_t * buf,const Symbol & sym,uint64_t pltEntryAddr) const369480093f4SDimitry Andric void Hexagon::writePlt(uint8_t *buf, const Symbol &sym,
370480093f4SDimitry Andric uint64_t pltEntryAddr) const {
3710b57cec5SDimitry Andric const uint8_t inst[] = {
3720b57cec5SDimitry Andric 0x00, 0x40, 0x00, 0x00, // { immext (#0)
3730b57cec5SDimitry Andric 0x0e, 0xc0, 0x49, 0x6a, // r14 = add (pc, ##GOTn@PCREL) }
3740b57cec5SDimitry Andric 0x1c, 0xc0, 0x8e, 0x91, // r28 = memw (r14)
3750b57cec5SDimitry Andric 0x00, 0xc0, 0x9c, 0x52, // jumpr r28
3760b57cec5SDimitry Andric };
3770b57cec5SDimitry Andric memcpy(buf, inst, sizeof(inst));
3780b57cec5SDimitry Andric
379480093f4SDimitry Andric uint64_t gotPltEntryAddr = sym.getGotPltVA();
3805ffd83dbSDimitry Andric relocateNoSym(buf, R_HEX_B32_PCREL_X, gotPltEntryAddr - pltEntryAddr);
3815ffd83dbSDimitry Andric relocateNoSym(buf + 4, R_HEX_6_PCREL_X, gotPltEntryAddr - pltEntryAddr);
3820b57cec5SDimitry Andric }
3830b57cec5SDimitry Andric
getDynRel(RelType type) const38485868e8aSDimitry Andric RelType Hexagon::getDynRel(RelType type) const {
38585868e8aSDimitry Andric if (type == R_HEX_32)
38685868e8aSDimitry Andric return type;
38785868e8aSDimitry Andric return R_HEX_NONE;
38885868e8aSDimitry Andric }
38985868e8aSDimitry Andric
getImplicitAddend(const uint8_t * buf,RelType type) const3905f757f3fSDimitry Andric int64_t Hexagon::getImplicitAddend(const uint8_t *buf, RelType type) const {
3915f757f3fSDimitry Andric switch (type) {
3925f757f3fSDimitry Andric case R_HEX_NONE:
3935f757f3fSDimitry Andric case R_HEX_GLOB_DAT:
3945f757f3fSDimitry Andric case R_HEX_JMP_SLOT:
3955f757f3fSDimitry Andric return 0;
3965f757f3fSDimitry Andric case R_HEX_32:
3975f757f3fSDimitry Andric case R_HEX_RELATIVE:
3985f757f3fSDimitry Andric case R_HEX_DTPMOD_32:
3995f757f3fSDimitry Andric case R_HEX_DTPREL_32:
4005f757f3fSDimitry Andric case R_HEX_TPREL_32:
4015f757f3fSDimitry Andric return SignExtend64<32>(read32(buf));
4025f757f3fSDimitry Andric default:
4035f757f3fSDimitry Andric internalLinkerError(getErrorLocation(buf),
4045f757f3fSDimitry Andric "cannot read addend for relocation " + toString(type));
4055f757f3fSDimitry Andric return 0;
4065f757f3fSDimitry Andric }
4075f757f3fSDimitry Andric }
4085f757f3fSDimitry Andric
getHexagonTargetInfo()4095ffd83dbSDimitry Andric TargetInfo *elf::getHexagonTargetInfo() {
4100b57cec5SDimitry Andric static Hexagon target;
4110b57cec5SDimitry Andric return ⌖
4120b57cec5SDimitry Andric }
413