/* RISC-V-specific support for ELF. Copyright (C) 2011-2021 Free Software Foundation, Inc. Contributed by Andrew Waterman (andrew@sifive.com). Based on TILE-Gx and MIPS targets. This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; see the file COPYING3. If not, see . */ #include "sysdep.h" #include "bfd.h" #include "libbfd.h" #include "elf-bfd.h" #include "elf/riscv.h" #include "opcode/riscv.h" #include "libiberty.h" #include "elfxx-riscv.h" #include "safe-ctype.h" #define MINUS_ONE ((bfd_vma)0 - 1) /* Special handler for ADD/SUB relocations that allows them to be filled out both in the pre-linked and post-linked file. This is necessary to make pre-linked debug info work, as due to linker relaxations we need to emit relocations for the debug info. */ static bfd_reloc_status_type riscv_elf_add_sub_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); /* The relocation table used for SHT_RELA sections. */ static reloc_howto_type howto_table[] = { /* No relocation. */ HOWTO (R_RISCV_NONE, /* type */ 0, /* rightshift */ 3, /* size */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_NONE", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* 32 bit relocation. */ HOWTO (R_RISCV_32, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_32", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* 64 bit relocation. */ HOWTO (R_RISCV_64, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_64", /* name */ false, /* partial_inplace */ 0, /* src_mask */ MINUS_ONE, /* dst_mask */ false), /* pcrel_offset */ /* Relocation against a local symbol in a shared object. */ HOWTO (R_RISCV_RELATIVE, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_RELATIVE", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_RISCV_COPY, /* type */ 0, /* rightshift */ 0, /* this one is variable size */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_COPY", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_RISCV_JUMP_SLOT, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_JUMP_SLOT", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* Dynamic TLS relocations. */ HOWTO (R_RISCV_TLS_DTPMOD32, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_DTPMOD32", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_RISCV_TLS_DTPMOD64, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_DTPMOD64", /* name */ false, /* partial_inplace */ 0, /* src_mask */ MINUS_ONE, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_RISCV_TLS_DTPREL32, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_DTPREL32", /* name */ true, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_RISCV_TLS_DTPREL64, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_DTPREL64", /* name */ true, /* partial_inplace */ 0, /* src_mask */ MINUS_ONE, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_RISCV_TLS_TPREL32, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_TPREL32", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_RISCV_TLS_TPREL64, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_TPREL64", /* name */ false, /* partial_inplace */ 0, /* src_mask */ MINUS_ONE, /* dst_mask */ false), /* pcrel_offset */ /* Reserved for future relocs that the dynamic linker must understand. */ EMPTY_HOWTO (12), EMPTY_HOWTO (13), EMPTY_HOWTO (14), EMPTY_HOWTO (15), /* 12-bit PC-relative branch offset. */ HOWTO (R_RISCV_BRANCH, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_BRANCH", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_BTYPE_IMM (-1U), /* dst_mask */ true), /* pcrel_offset */ /* 20-bit PC-relative jump offset. */ HOWTO (R_RISCV_JAL, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_JAL", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_JTYPE_IMM (-1U), /* dst_mask */ true), /* pcrel_offset */ /* 32-bit PC-relative function call (AUIPC/JALR). */ HOWTO (R_RISCV_CALL, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_CALL", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32), /* dst_mask */ true), /* pcrel_offset */ /* Like R_RISCV_CALL, but not locally binding. */ HOWTO (R_RISCV_CALL_PLT, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_CALL_PLT", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32), /* dst_mask */ true), /* pcrel_offset */ /* High 20 bits of 32-bit PC-relative GOT access. */ HOWTO (R_RISCV_GOT_HI20, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_GOT_HI20", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* High 20 bits of 32-bit PC-relative TLS IE GOT access. */ HOWTO (R_RISCV_TLS_GOT_HI20, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_GOT_HI20", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* High 20 bits of 32-bit PC-relative TLS GD GOT reference. */ HOWTO (R_RISCV_TLS_GD_HI20, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TLS_GD_HI20", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* High 20 bits of 32-bit PC-relative reference. */ HOWTO (R_RISCV_PCREL_HI20, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_PCREL_HI20", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U), /* dst_mask */ true), /* pcrel_offset */ /* Low 12 bits of a 32-bit PC-relative load or add. */ HOWTO (R_RISCV_PCREL_LO12_I, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_PCREL_LO12_I", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_ITYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* Low 12 bits of a 32-bit PC-relative store. */ HOWTO (R_RISCV_PCREL_LO12_S, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_PCREL_LO12_S", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_STYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* High 20 bits of 32-bit absolute address. */ HOWTO (R_RISCV_HI20, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_HI20", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* High 12 bits of 32-bit load or add. */ HOWTO (R_RISCV_LO12_I, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_LO12_I", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_ITYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* High 12 bits of 32-bit store. */ HOWTO (R_RISCV_LO12_S, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_LO12_S", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_STYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* High 20 bits of TLS LE thread pointer offset. */ HOWTO (R_RISCV_TPREL_HI20, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TPREL_HI20", /* name */ true, /* partial_inplace */ 0, /* src_mask */ ENCODE_UTYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* Low 12 bits of TLS LE thread pointer offset for loads and adds. */ HOWTO (R_RISCV_TPREL_LO12_I, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TPREL_LO12_I", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_ITYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* Low 12 bits of TLS LE thread pointer offset for stores. */ HOWTO (R_RISCV_TPREL_LO12_S, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TPREL_LO12_S", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_STYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* TLS LE thread pointer usage. May be relaxed. */ HOWTO (R_RISCV_TPREL_ADD, /* type */ 0, /* rightshift */ 3, /* size */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TPREL_ADD", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* 8-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_ADD8, /* type */ 0, /* rightshift */ 0, /* size */ 8, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_ADD8", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xff, /* dst_mask */ false), /* pcrel_offset */ /* 16-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_ADD16, /* type */ 0, /* rightshift */ 1, /* size */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_ADD16", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* 32-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_ADD32, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_ADD32", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* 64-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_ADD64, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_ADD64", /* name */ false, /* partial_inplace */ 0, /* src_mask */ MINUS_ONE, /* dst_mask */ false), /* pcrel_offset */ /* 8-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_SUB8, /* type */ 0, /* rightshift */ 0, /* size */ 8, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_SUB8", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xff, /* dst_mask */ false), /* pcrel_offset */ /* 16-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_SUB16, /* type */ 0, /* rightshift */ 1, /* size */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_SUB16", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* 32-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_SUB32, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_SUB32", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* 64-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_SUB64, /* type */ 0, /* rightshift */ 4, /* size */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_SUB64", /* name */ false, /* partial_inplace */ 0, /* src_mask */ MINUS_ONE, /* dst_mask */ false), /* pcrel_offset */ /* GNU extension to record C++ vtable hierarchy */ HOWTO (R_RISCV_GNU_VTINHERIT, /* type */ 0, /* rightshift */ 4, /* size */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ NULL, /* special_function */ "R_RISCV_GNU_VTINHERIT", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* GNU extension to record C++ vtable member usage */ HOWTO (R_RISCV_GNU_VTENTRY, /* type */ 0, /* rightshift */ 4, /* size */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ _bfd_elf_rel_vtable_reloc_fn, /* special_function */ "R_RISCV_GNU_VTENTRY", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* Indicates an alignment statement. The addend field encodes how many bytes of NOPs follow the statement. The desired alignment is the addend rounded up to the next power of two. */ HOWTO (R_RISCV_ALIGN, /* type */ 0, /* rightshift */ 3, /* size */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_ALIGN", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* 8-bit PC-relative branch offset. */ HOWTO (R_RISCV_RVC_BRANCH, /* type */ 0, /* rightshift */ 1, /* size */ 16, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_RVC_BRANCH", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_CBTYPE_IMM (-1U), /* dst_mask */ true), /* pcrel_offset */ /* 11-bit PC-relative jump offset. */ HOWTO (R_RISCV_RVC_JUMP, /* type */ 0, /* rightshift */ 1, /* size */ 16, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_RVC_JUMP", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_CJTYPE_IMM (-1U), /* dst_mask */ true), /* pcrel_offset */ /* High 6 bits of 18-bit absolute address. */ HOWTO (R_RISCV_RVC_LUI, /* type */ 0, /* rightshift */ 1, /* size */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_RVC_LUI", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_CITYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* GP-relative load. */ HOWTO (R_RISCV_GPREL_I, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_GPREL_I", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_ITYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* GP-relative store. */ HOWTO (R_RISCV_GPREL_S, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_GPREL_S", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_STYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* TP-relative TLS LE load. */ HOWTO (R_RISCV_TPREL_I, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TPREL_I", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_ITYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* TP-relative TLS LE store. */ HOWTO (R_RISCV_TPREL_S, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_TPREL_S", /* name */ false, /* partial_inplace */ 0, /* src_mask */ ENCODE_STYPE_IMM (-1U), /* dst_mask */ false), /* pcrel_offset */ /* The paired relocation may be relaxed. */ HOWTO (R_RISCV_RELAX, /* type */ 0, /* rightshift */ 3, /* size */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_RELAX", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* 6-bit in-place addition, for local label subtraction. */ HOWTO (R_RISCV_SUB6, /* type */ 0, /* rightshift */ 0, /* size */ 8, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ riscv_elf_add_sub_reloc, /* special_function */ "R_RISCV_SUB6", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0x3f, /* dst_mask */ false), /* pcrel_offset */ /* 6-bit in-place setting, for local label subtraction. */ HOWTO (R_RISCV_SET6, /* type */ 0, /* rightshift */ 0, /* size */ 8, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_SET6", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0x3f, /* dst_mask */ false), /* pcrel_offset */ /* 8-bit in-place setting, for local label subtraction. */ HOWTO (R_RISCV_SET8, /* type */ 0, /* rightshift */ 0, /* size */ 8, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_SET8", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xff, /* dst_mask */ false), /* pcrel_offset */ /* 16-bit in-place setting, for local label subtraction. */ HOWTO (R_RISCV_SET16, /* type */ 0, /* rightshift */ 1, /* size */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_SET16", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* 32-bit in-place setting, for local label subtraction. */ HOWTO (R_RISCV_SET32, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_SET32", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* 32-bit PC relative. */ HOWTO (R_RISCV_32_PCREL, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_32_PCREL", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* Relocation against a local ifunc symbol in a shared object. */ HOWTO (R_RISCV_IRELATIVE, /* type */ 0, /* rightshift */ 2, /* size */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_RISCV_IRELATIVE", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ }; /* A mapping from BFD reloc types to RISC-V ELF reloc types. */ struct elf_reloc_map { bfd_reloc_code_real_type bfd_val; enum elf_riscv_reloc_type elf_val; }; static const struct elf_reloc_map riscv_reloc_map[] = { { BFD_RELOC_NONE, R_RISCV_NONE }, { BFD_RELOC_32, R_RISCV_32 }, { BFD_RELOC_64, R_RISCV_64 }, { BFD_RELOC_RISCV_ADD8, R_RISCV_ADD8 }, { BFD_RELOC_RISCV_ADD16, R_RISCV_ADD16 }, { BFD_RELOC_RISCV_ADD32, R_RISCV_ADD32 }, { BFD_RELOC_RISCV_ADD64, R_RISCV_ADD64 }, { BFD_RELOC_RISCV_SUB8, R_RISCV_SUB8 }, { BFD_RELOC_RISCV_SUB16, R_RISCV_SUB16 }, { BFD_RELOC_RISCV_SUB32, R_RISCV_SUB32 }, { BFD_RELOC_RISCV_SUB64, R_RISCV_SUB64 }, { BFD_RELOC_CTOR, R_RISCV_64 }, { BFD_RELOC_12_PCREL, R_RISCV_BRANCH }, { BFD_RELOC_RISCV_HI20, R_RISCV_HI20 }, { BFD_RELOC_RISCV_LO12_I, R_RISCV_LO12_I }, { BFD_RELOC_RISCV_LO12_S, R_RISCV_LO12_S }, { BFD_RELOC_RISCV_PCREL_LO12_I, R_RISCV_PCREL_LO12_I }, { BFD_RELOC_RISCV_PCREL_LO12_S, R_RISCV_PCREL_LO12_S }, { BFD_RELOC_RISCV_CALL, R_RISCV_CALL }, { BFD_RELOC_RISCV_CALL_PLT, R_RISCV_CALL_PLT }, { BFD_RELOC_RISCV_PCREL_HI20, R_RISCV_PCREL_HI20 }, { BFD_RELOC_RISCV_JMP, R_RISCV_JAL }, { BFD_RELOC_RISCV_GOT_HI20, R_RISCV_GOT_HI20 }, { BFD_RELOC_RISCV_TLS_DTPMOD32, R_RISCV_TLS_DTPMOD32 }, { BFD_RELOC_RISCV_TLS_DTPREL32, R_RISCV_TLS_DTPREL32 }, { BFD_RELOC_RISCV_TLS_DTPMOD64, R_RISCV_TLS_DTPMOD64 }, { BFD_RELOC_RISCV_TLS_DTPREL64, R_RISCV_TLS_DTPREL64 }, { BFD_RELOC_RISCV_TLS_TPREL32, R_RISCV_TLS_TPREL32 }, { BFD_RELOC_RISCV_TLS_TPREL64, R_RISCV_TLS_TPREL64 }, { BFD_RELOC_RISCV_TPREL_HI20, R_RISCV_TPREL_HI20 }, { BFD_RELOC_RISCV_TPREL_ADD, R_RISCV_TPREL_ADD }, { BFD_RELOC_RISCV_TPREL_LO12_S, R_RISCV_TPREL_LO12_S }, { BFD_RELOC_RISCV_TPREL_LO12_I, R_RISCV_TPREL_LO12_I }, { BFD_RELOC_RISCV_TLS_GOT_HI20, R_RISCV_TLS_GOT_HI20 }, { BFD_RELOC_RISCV_TLS_GD_HI20, R_RISCV_TLS_GD_HI20 }, { BFD_RELOC_RISCV_ALIGN, R_RISCV_ALIGN }, { BFD_RELOC_RISCV_RVC_BRANCH, R_RISCV_RVC_BRANCH }, { BFD_RELOC_RISCV_RVC_JUMP, R_RISCV_RVC_JUMP }, { BFD_RELOC_RISCV_RVC_LUI, R_RISCV_RVC_LUI }, { BFD_RELOC_RISCV_GPREL_I, R_RISCV_GPREL_I }, { BFD_RELOC_RISCV_GPREL_S, R_RISCV_GPREL_S }, { BFD_RELOC_RISCV_TPREL_I, R_RISCV_TPREL_I }, { BFD_RELOC_RISCV_TPREL_S, R_RISCV_TPREL_S }, { BFD_RELOC_RISCV_RELAX, R_RISCV_RELAX }, { BFD_RELOC_RISCV_SUB6, R_RISCV_SUB6 }, { BFD_RELOC_RISCV_SET6, R_RISCV_SET6 }, { BFD_RELOC_RISCV_SET8, R_RISCV_SET8 }, { BFD_RELOC_RISCV_SET16, R_RISCV_SET16 }, { BFD_RELOC_RISCV_SET32, R_RISCV_SET32 }, { BFD_RELOC_RISCV_32_PCREL, R_RISCV_32_PCREL }, }; /* Given a BFD reloc type, return a howto structure. */ reloc_howto_type * riscv_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) { unsigned int i; for (i = 0; i < ARRAY_SIZE (riscv_reloc_map); i++) if (riscv_reloc_map[i].bfd_val == code) return &howto_table[(int) riscv_reloc_map[i].elf_val]; bfd_set_error (bfd_error_bad_value); return NULL; } reloc_howto_type * riscv_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) { unsigned int i; for (i = 0; i < ARRAY_SIZE (howto_table); i++) if (howto_table[i].name && strcasecmp (howto_table[i].name, r_name) == 0) return &howto_table[i]; return NULL; } reloc_howto_type * riscv_elf_rtype_to_howto (bfd *abfd, unsigned int r_type) { if (r_type >= ARRAY_SIZE (howto_table)) { (*_bfd_error_handler) (_("%pB: unsupported relocation type %#x"), abfd, r_type); bfd_set_error (bfd_error_bad_value); return NULL; } return &howto_table[r_type]; } /* Special_function of RISCV_ADD and RISCV_SUB relocations. */ static bfd_reloc_status_type riscv_elf_add_sub_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, void *data, asection *input_section, bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) { reloc_howto_type *howto = reloc_entry->howto; bfd_vma relocation; if (output_bfd != NULL && (symbol->flags & BSF_SECTION_SYM) == 0 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) { reloc_entry->address += input_section->output_offset; return bfd_reloc_ok; } if (output_bfd != NULL) return bfd_reloc_continue; relocation = symbol->value + symbol->section->output_section->vma + symbol->section->output_offset + reloc_entry->addend; bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd, input_section); if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd, input_section, octets)) return bfd_reloc_outofrange; bfd_vma old_value = bfd_get (howto->bitsize, abfd, data + reloc_entry->address); switch (howto->type) { case R_RISCV_ADD8: case R_RISCV_ADD16: case R_RISCV_ADD32: case R_RISCV_ADD64: relocation = old_value + relocation; break; case R_RISCV_SUB6: case R_RISCV_SUB8: case R_RISCV_SUB16: case R_RISCV_SUB32: case R_RISCV_SUB64: relocation = old_value - relocation; break; } bfd_put (howto->bitsize, abfd, relocation, data + reloc_entry->address); return bfd_reloc_ok; } /* Always add the IMPLICIT for the SUBSET. */ static bool check_implicit_always (const char *implicit ATTRIBUTE_UNUSED, riscv_subset_t *subset ATTRIBUTE_UNUSED) { return true; } /* Add the IMPLICIT only when the version of SUBSET less than 2.1. */ static bool check_implicit_for_i (const char *implicit ATTRIBUTE_UNUSED, riscv_subset_t *subset) { return (subset->major_version < 2 || (subset->major_version == 2 && subset->minor_version < 1)); } /* Record all implicit information for the subsets. */ struct riscv_implicit_subset { const char *subset_name; const char *implicit_name; /* A function to determine if we need to add the implicit subset. */ bool (*check_func) (const char *, riscv_subset_t *); }; static struct riscv_implicit_subset riscv_implicit_subsets[] = { {"e", "i", check_implicit_always}, {"i", "zicsr", check_implicit_for_i}, {"i", "zifencei", check_implicit_for_i}, {"g", "i", check_implicit_always}, {"g", "m", check_implicit_always}, {"g", "a", check_implicit_always}, {"g", "f", check_implicit_always}, {"g", "d", check_implicit_always}, {"g", "zicsr", check_implicit_always}, {"g", "zifencei", check_implicit_always}, {"q", "d", check_implicit_always}, {"v", "d", check_implicit_always}, {"v", "zve64d", check_implicit_always}, {"v", "zvl128b", check_implicit_always}, {"zvamo", "a", check_implicit_always}, {"zve64d", "d", check_implicit_always}, {"zve64d", "zve64f", check_implicit_always}, {"zve64f", "zve32f", check_implicit_always}, {"zve64f", "zve64x", check_implicit_always}, {"zve64f", "zvl64b", check_implicit_always}, {"zve32f", "f", check_implicit_always}, {"zve32f", "zvl32b", check_implicit_always}, {"zve32f", "zve32x", check_implicit_always}, {"zve64x", "zve32x", check_implicit_always}, {"zve64x", "zvl64b", check_implicit_always}, {"zve32x", "zvl32b", check_implicit_always}, {"zvl65536b", "zvl32768b", check_implicit_always}, {"zvl32768b", "zvl16384b", check_implicit_always}, {"zvl16384b", "zvl8192b", check_implicit_always}, {"zvl8192b", "zvl4096b", check_implicit_always}, {"zvl4096b", "zvl2048b", check_implicit_always}, {"zvl2048b", "zvl1024b", check_implicit_always}, {"zvl1024b", "zvl512b", check_implicit_always}, {"zvl512b", "zvl256b", check_implicit_always}, {"zvl256b", "zvl128b", check_implicit_always}, {"zvl128b", "zvl64b", check_implicit_always}, {"zvl64b", "zvl32b", check_implicit_always}, {"d", "f", check_implicit_always}, {"f", "zicsr", check_implicit_always}, {"zfh", "f", check_implicit_always}, {"zfh", "zicsr", check_implicit_always}, {NULL, NULL, NULL} }; /* For default_enable field, decide if the extension should be enbaled by default. */ #define EXT_DEFAULT 0x1 /* List all extensions that binutils should know about. */ struct riscv_supported_ext { const char *name; enum riscv_spec_class isa_spec_class; int major_version; int minor_version; unsigned long default_enable; }; /* The standard extensions must be added in canonical order. */ static struct riscv_supported_ext riscv_supported_std_ext[] = { {"e", ISA_SPEC_CLASS_20191213, 1, 9, 0 }, {"e", ISA_SPEC_CLASS_20190608, 1, 9, 0 }, {"e", ISA_SPEC_CLASS_2P2, 1, 9, 0 }, {"i", ISA_SPEC_CLASS_20191213, 2, 1, 0 }, {"i", ISA_SPEC_CLASS_20190608, 2, 1, 0 }, {"i", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, /* The g is a special case which we don't want to output it, but still need it when adding implicit extensions. */ {"g", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, EXT_DEFAULT }, {"m", ISA_SPEC_CLASS_20191213, 2, 0, 0 }, {"m", ISA_SPEC_CLASS_20190608, 2, 0, 0 }, {"m", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"a", ISA_SPEC_CLASS_20191213, 2, 1, 0 }, {"a", ISA_SPEC_CLASS_20190608, 2, 0, 0 }, {"a", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"f", ISA_SPEC_CLASS_20191213, 2, 2, 0 }, {"f", ISA_SPEC_CLASS_20190608, 2, 2, 0 }, {"f", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"d", ISA_SPEC_CLASS_20191213, 2, 2, 0 }, {"d", ISA_SPEC_CLASS_20190608, 2, 2, 0 }, {"d", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"q", ISA_SPEC_CLASS_20191213, 2, 2, 0 }, {"q", ISA_SPEC_CLASS_20190608, 2, 2, 0 }, {"q", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"l", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 }, {"c", ISA_SPEC_CLASS_20191213, 2, 0, 0 }, {"c", ISA_SPEC_CLASS_20190608, 2, 0, 0 }, {"c", ISA_SPEC_CLASS_2P2, 2, 0, 0 }, {"b", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 }, {"j", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 }, {"t", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 }, {"p", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 }, {"v", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"n", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, 0 }, {NULL, 0, 0, 0, 0} }; static struct riscv_supported_ext riscv_supported_std_z_ext[] = { {"zicsr", ISA_SPEC_CLASS_20191213, 2, 0, 0 }, {"zicsr", ISA_SPEC_CLASS_20190608, 2, 0, 0 }, {"zifencei", ISA_SPEC_CLASS_20191213, 2, 0, 0 }, {"zifencei", ISA_SPEC_CLASS_20190608, 2, 0, 0 }, {"zihintpause", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zbb", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zba", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zbc", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zbs", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zve32x", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zve32f", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zve32d", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zve64x", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zve64f", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zve64d", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl32b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl64b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl128b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl256b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl512b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl1024b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl2048b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl4096b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl8192b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl16384b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl32768b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvl65536b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zvamo", ISA_SPEC_CLASS_DRAFT, 0, 10, 0 }, /* draft. */ {"zfh", ISA_SPEC_CLASS_DRAFT, 0, 1, 0 }, /* draft. */ {NULL, 0, 0, 0, 0} }; static struct riscv_supported_ext riscv_supported_std_s_ext[] = { {"svinval", ISA_SPEC_CLASS_DRAFT, 0, 1, 0 }, /* draft. */ {NULL, 0, 0, 0, 0} }; static struct riscv_supported_ext riscv_supported_std_h_ext[] = { {NULL, 0, 0, 0, 0} }; static struct riscv_supported_ext riscv_supported_std_zxm_ext[] = { {NULL, 0, 0, 0, 0} }; /* T-HEAD extentions for Xuantie C9xx. The version 2.0 just keeps compatible. */ static struct riscv_supported_ext riscv_supported_vendor_thead_ext[] = { {"xtheadc", VENDOR_SPEC_CLASS_THEAD, 2, 0, 0 }, {"xtheade", VENDOR_SPEC_CLASS_THEAD, 2, 0, 0 }, {"xtheadse", VENDOR_SPEC_CLASS_THEAD, 2, 0, 0 }, {NULL, 0, 0, 0, 0} }; const struct riscv_supported_ext *riscv_all_supported_ext[] = { riscv_supported_std_ext, riscv_supported_std_z_ext, riscv_supported_std_s_ext, riscv_supported_std_h_ext, riscv_supported_std_zxm_ext, riscv_supported_vendor_thead_ext, NULL }; /* ISA extension prefixed name class. Must define them in parsing order. */ enum riscv_prefix_ext_class { RV_ISA_CLASS_Z = 1, RV_ISA_CLASS_S, RV_ISA_CLASS_H, RV_ISA_CLASS_ZXM, RV_ISA_CLASS_X, RV_ISA_CLASS_UNKNOWN }; /* Record the strings of the prefixed extensions, and their corresponding classes. The more letters of the prefix string, the more forward it must be defined. Otherwise, the riscv_get_prefix_class will map it to the wrong classes. */ struct riscv_parse_prefix_config { /* Class of the extension. */ enum riscv_prefix_ext_class class; /* Prefix string for error printing and internal parser usage. */ const char *prefix; }; static const struct riscv_parse_prefix_config parse_config[] = { {RV_ISA_CLASS_ZXM, "zxm"}, {RV_ISA_CLASS_Z, "z"}, {RV_ISA_CLASS_S, "s"}, {RV_ISA_CLASS_H, "h"}, {RV_ISA_CLASS_X, "x"}, {RV_ISA_CLASS_UNKNOWN, NULL} }; /* Get the prefixed name class for the extensions, the class also means the order of the prefixed extensions. */ static enum riscv_prefix_ext_class riscv_get_prefix_class (const char *arch) { int i = 0; while (parse_config[i].class != RV_ISA_CLASS_UNKNOWN) { if (strncmp (arch, parse_config[i].prefix, strlen (parse_config[i].prefix)) == 0) return parse_config[i].class; i++; } return RV_ISA_CLASS_UNKNOWN; } /* Check KNOWN_EXTS to see if the EXT is supported. */ static bool riscv_known_prefixed_ext (const char *ext, struct riscv_supported_ext *known_exts) { size_t i; for (i = 0; known_exts[i].name != NULL; ++i) if (strcmp (ext, known_exts[i].name) == 0) return true; return false; } /* Check whether the prefixed extension is recognized or not. Return true if recognized, otehrwise return false. */ static bool riscv_recognized_prefixed_ext (const char *ext) { enum riscv_prefix_ext_class class = riscv_get_prefix_class (ext); switch (class) { case RV_ISA_CLASS_Z: return riscv_known_prefixed_ext (ext, riscv_supported_std_z_ext); case RV_ISA_CLASS_ZXM: return riscv_known_prefixed_ext (ext, riscv_supported_std_zxm_ext); case RV_ISA_CLASS_S: return riscv_known_prefixed_ext (ext, riscv_supported_std_s_ext); case RV_ISA_CLASS_H: return riscv_known_prefixed_ext (ext, riscv_supported_std_h_ext); case RV_ISA_CLASS_X: /* Only the single x is unrecognized. */ if (strcmp (ext, "x") != 0) return true; default: break; } return false; } /* Array is used to compare the orders of standard extensions quickly. */ static int riscv_ext_order[26] = {0}; /* Init the riscv_ext_order array. */ static void riscv_init_ext_order (void) { static bool inited = false; if (inited) return; /* The orders of all standard extensions are positive. */ int order = 1; int i = 0; while (riscv_supported_std_ext[i].name != NULL) { const char *ext = riscv_supported_std_ext[i].name; riscv_ext_order[(*ext - 'a')] = order++; i++; while (riscv_supported_std_ext[i].name && strcmp (ext, riscv_supported_std_ext[i].name) == 0) i++; } /* Some of the prefixed keyword are not single letter, so we set their prefixed orders in the riscv_compare_subsets directly, not through the riscv_ext_order. */ inited = true; } /* Similar to the strcmp. It returns an integer less than, equal to, or greater than zero if `subset2` is found, respectively, to be less than, to match, or be greater than `subset1`. The order values, Zero: Preserved keywords. Positive number: Standard extensions. Negative number: Prefixed keywords. */ int riscv_compare_subsets (const char *subset1, const char *subset2) { int order1 = riscv_ext_order[(*subset1 - 'a')]; int order2 = riscv_ext_order[(*subset2 - 'a')]; /* Compare the standard extension first. */ if (order1 > 0 && order2 > 0) return order1 - order2; /* Set the prefixed orders to negative numbers. */ enum riscv_prefix_ext_class class1 = riscv_get_prefix_class (subset1); enum riscv_prefix_ext_class class2 = riscv_get_prefix_class (subset2); if (class1 != RV_ISA_CLASS_UNKNOWN) order1 = - (int) class1; if (class2 != RV_ISA_CLASS_UNKNOWN) order2 = - (int) class2; if (order1 == order2) { /* Compare the standard addition z extensions. */ if (class1 == RV_ISA_CLASS_Z) { order1 = riscv_ext_order[(*++subset1 - 'a')]; order2 = riscv_ext_order[(*++subset2 - 'a')]; if (order1 != order2) return order1 - order2; } return strcasecmp (++subset1, ++subset2); } return order2 - order1; } /* Find subset in the list. Return TRUE and set `current` to the subset if it is found. Otherwise, return FALSE and set `current` to the place where we should insert the subset. However, return FALSE with the NULL `current` means we should insert the subset at the head of subset list, if needed. */ bool riscv_lookup_subset (const riscv_subset_list_t *subset_list, const char *subset, riscv_subset_t **current) { riscv_subset_t *s, *pre_s = NULL; /* If the subset is added in order, then just add it at the tail. */ if (subset_list->tail != NULL && riscv_compare_subsets (subset_list->tail->name, subset) < 0) { *current = subset_list->tail; return false; } for (s = subset_list->head; s != NULL; pre_s = s, s = s->next) { int cmp = riscv_compare_subsets (s->name, subset); if (cmp == 0) { *current = s; return true; } else if (cmp > 0) break; } *current = pre_s; return false; } /* Add the extension to the subset list. Search the list first, and then find the right place to add. */ void riscv_add_subset (riscv_subset_list_t *subset_list, const char *subset, int major, int minor) { riscv_subset_t *current, *new; if (riscv_lookup_subset (subset_list, subset, ¤t)) return; new = xmalloc (sizeof *new); new->name = xstrdup (subset); new->major_version = major; new->minor_version = minor; new->next = NULL; if (current != NULL) { new->next = current->next; current->next = new; } else { new->next = subset_list->head; subset_list->head = new; } if (new->next == NULL) subset_list->tail = new; } /* Get the default versions from the riscv_supported_*ext tables. */ static void riscv_get_default_ext_version (enum riscv_spec_class default_isa_spec, const char *name, int *major_version, int *minor_version) { if (name == NULL || default_isa_spec == ISA_SPEC_CLASS_NONE) return; struct riscv_supported_ext *table = NULL; enum riscv_prefix_ext_class class = riscv_get_prefix_class (name); switch (class) { case RV_ISA_CLASS_ZXM: table = riscv_supported_std_zxm_ext; break; case RV_ISA_CLASS_Z: table = riscv_supported_std_z_ext; break; case RV_ISA_CLASS_S: table = riscv_supported_std_s_ext; break; case RV_ISA_CLASS_H: table = riscv_supported_std_h_ext; break; case RV_ISA_CLASS_X: table = riscv_supported_vendor_thead_ext; break; default: table = riscv_supported_std_ext; } int i = 0; while (table != NULL && table[i].name != NULL) { if (strcmp (table[i].name, name) == 0 && (table[i].isa_spec_class == ISA_SPEC_CLASS_DRAFT || table[i].isa_spec_class == VENDOR_SPEC_CLASS_THEAD || table[i].isa_spec_class == default_isa_spec)) { *major_version = table[i].major_version; *minor_version = table[i].minor_version; return; } i++; } } /* Find the default versions for the extension before adding them to the subset list, if their versions are RISCV_UNKNOWN_VERSION. Afterwards, report errors if we can not find their default versions. */ static void riscv_parse_add_subset (riscv_parse_subset_t *rps, const char *subset, int major, int minor, bool implicit) { int major_version = major; int minor_version = minor; if (major_version == RISCV_UNKNOWN_VERSION || minor_version == RISCV_UNKNOWN_VERSION) riscv_get_default_ext_version (rps->isa_spec, subset, &major_version, &minor_version); /* We don't care the versions of the implicit extensions. */ if (!implicit && (major_version == RISCV_UNKNOWN_VERSION || minor_version == RISCV_UNKNOWN_VERSION)) { if (subset[0] == 'x') rps->error_handler (_("x ISA extension `%s' must be set with the versions"), subset); else rps->error_handler (_("cannot find default versions of the ISA extension `%s'"), subset); return; } riscv_add_subset (rps->subset_list, subset, major_version, minor_version); } /* Release subset list. */ void riscv_release_subset_list (riscv_subset_list_t *subset_list) { while (subset_list->head != NULL) { riscv_subset_t *next = subset_list->head->next; free ((void *)subset_list->head->name); free (subset_list->head); subset_list->head = next; } subset_list->tail = NULL; } /* Parsing extension version. Return Value: Points to the end of version Arguments: `p`: Curent parsing position. `major_version`: Parsed major version. `minor_version`: Parsed minor version. */ static const char * riscv_parsing_subset_version (const char *p, int *major_version, int *minor_version) { bool major_p = true; int version = 0; char np; *major_version = 0; *minor_version = 0; for (; *p; ++p) { if (*p == 'p') { np = *(p + 1); /* Might be beginning of `p` extension. */ if (!ISDIGIT (np)) break; *major_version = version; major_p = false; version = 0; } else if (ISDIGIT (*p)) version = (version * 10) + (*p - '0'); else break; } if (major_p) *major_version = version; else *minor_version = version; /* We can not find any version in string. */ if (*major_version == 0 && *minor_version == 0) { *major_version = RISCV_UNKNOWN_VERSION; *minor_version = RISCV_UNKNOWN_VERSION; } return p; } /* Parsing function for standard extensions. Return Value: Points to the end of extensions. Arguments: `rps`: Hooks and status for parsing extensions. `arch`: Full ISA string. `p`: Curent parsing position. */ static const char * riscv_parse_std_ext (riscv_parse_subset_t *rps, const char *arch, const char *p) { /* First letter must start with i, e or g. */ if (*p != 'e' && *p != 'i' && *p != 'g') { rps->error_handler (_("%s: first ISA extension must be `e', `i' or `g'"), arch); return NULL; } while (p != NULL && *p != '\0') { /* Stop when we parsed the known prefix class. */ enum riscv_prefix_ext_class class = riscv_get_prefix_class (p); if (class != RV_ISA_CLASS_UNKNOWN) break; if (*p == '_') { p++; continue; } bool implicit = false; int major = RISCV_UNKNOWN_VERSION; int minor = RISCV_UNKNOWN_VERSION; char subset[2] = {0, 0}; subset[0] = *p; /* Check if the standard extension is supported. */ if (riscv_ext_order[(subset[0] - 'a')] == 0) { rps->error_handler (_("%s: unknown standard ISA extension `%c'"), arch, subset[0]); return NULL; } /* Checking canonical order. */ if (rps->subset_list->tail != NULL && riscv_compare_subsets (rps->subset_list->tail->name, subset) > 0) { rps->error_handler (_("%s: standard ISA extension `%c' is not " "in canonical order"), arch, subset[0]); return NULL; } p = riscv_parsing_subset_version (++p, &major, &minor); /* Added g as an implicit extension. */ if (subset[0] == 'g') { implicit = true; major = RISCV_UNKNOWN_VERSION; minor = RISCV_UNKNOWN_VERSION; } riscv_parse_add_subset (rps, subset, major, minor, implicit); } return p; } /* Parsing function for prefixed extensions. Return Value: Points to the end of extension. Arguments: `rps`: Hooks and status for parsing extensions. `arch`: Full ISA string. `p`: Curent parsing position. */ static const char * riscv_parse_prefixed_ext (riscv_parse_subset_t *rps, const char *arch, const char *p) { int major_version; int minor_version; const char *last_name; enum riscv_prefix_ext_class class; while (*p) { if (*p == '_') { p++; continue; } class = riscv_get_prefix_class (p); if (class == RV_ISA_CLASS_UNKNOWN) { rps->error_handler (_("%s: unknown prefix class for the ISA extension `%s'"), arch, p); return NULL; } char *subset = xstrdup (p); char *q = subset; const char *end_of_version; /* Extract the whole prefixed extension by '_'. */ while (*++q != '\0' && *q != '_') ; /* Look forward to the first letter which is not p. */ bool find_any_version = false; bool find_minor_version = false; while (1) { q--; if (ISDIGIT (*q)) find_any_version = true; else if (find_any_version && !find_minor_version && *q == 'p' && ISDIGIT (*(q - 1))) find_minor_version = true; else break; } q++; /* Check if the end of extension is 'p' or not. If yes, then the second letter from the end cannot be number. */ if (*(q - 1) == 'p' && ISDIGIT (*(q - 2))) { *q = '\0'; rps->error_handler (_("%s: invalid prefixed ISA extension `%s' ends with p"), arch, subset); free (subset); return NULL; } end_of_version = riscv_parsing_subset_version (q, &major_version, &minor_version); *q = '\0'; if (end_of_version == NULL) { free (subset); return NULL; } /* Check that the extension name is well-formed. */ if (rps->check_unknown_prefixed_ext && !riscv_recognized_prefixed_ext (subset)) { rps->error_handler (_("%s: unknown prefixed ISA extension `%s'"), arch, subset); free (subset); return NULL; } /* Check that the extension isn't duplicate. */ last_name = rps->subset_list->tail->name; if (!strcasecmp (last_name, subset)) { rps->error_handler (_("%s: duplicate prefixed ISA extension `%s'"), arch, subset); free (subset); return NULL; } /* Check that the extension is in expected order. */ if (riscv_compare_subsets (last_name, subset) > 0) { rps->error_handler (_("%s: prefixed ISA extension `%s' is not in expected " "order. It must come before `%s'"), arch, subset, last_name); free (subset); return NULL; } riscv_parse_add_subset (rps, subset, major_version, minor_version, false); p += end_of_version - subset; free (subset); if (*p != '\0' && *p != '_') { rps->error_handler (_("%s: prefixed ISA extension must separate with _"), arch); return NULL; } } return p; } /* Add the implicit extensions. */ static void riscv_parse_add_implicit_subsets (riscv_parse_subset_t *rps) { struct riscv_implicit_subset *t = riscv_implicit_subsets; for (; t->subset_name; t++) { riscv_subset_t *subset = NULL; if (riscv_lookup_subset (rps->subset_list, t->subset_name, &subset) && t->check_func (t->implicit_name, subset)) riscv_parse_add_subset (rps, t->implicit_name, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, true); } } /* Check extensions conflicts. */ static bool riscv_parse_check_conflicts (riscv_parse_subset_t *rps) { riscv_subset_t *subset = NULL; int xlen = *rps->xlen; bool no_conflict = true; if (riscv_lookup_subset (rps->subset_list, "e", &subset) && xlen > 32) { rps->error_handler (_("rv%d does not support the `e' extension"), xlen); no_conflict = false; } if (riscv_lookup_subset (rps->subset_list, "q", &subset) && xlen < 64) { rps->error_handler (_("rv%d does not support the `q' extension"), xlen); no_conflict = false; } if (riscv_lookup_subset (rps->subset_list, "e", &subset) && riscv_lookup_subset (rps->subset_list, "f", &subset)) { rps->error_handler (_("rv32e does not support the `f' extension")); no_conflict = false; } bool support_zve = false; bool support_zvl = false; riscv_subset_t *s = rps->subset_list->head; for (; s != NULL; s = s->next) { if (!support_zve && strncmp (s->name, "zve", 3) == 0) support_zve = true; if (!support_zvl && strncmp (s->name, "zvl", 3) == 0) support_zvl = true; if (support_zve && support_zvl) break; } if (support_zvl && !support_zve) { rps->error_handler (_("zvl*b extensions need to enable either `v' or `zve' extension")); no_conflict = false; } return no_conflict; } /* Set the default subset list according to the default_enable field of riscv_supported_*ext tables. */ static void riscv_set_default_arch (riscv_parse_subset_t *rps) { unsigned long enable = EXT_DEFAULT; int i, j; for (i = 0; riscv_all_supported_ext[i] != NULL; i++) { const struct riscv_supported_ext *table = riscv_all_supported_ext[i]; for (j = 0; table[j].name != NULL; j++) { bool implicit = false; if (strcmp (table[j].name, "g") == 0) implicit = true; if (table[j].default_enable & enable) riscv_parse_add_subset (rps, table[j].name, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, implicit); } } } /* Function for parsing ISA string. Return Value: Return TRUE on success. Arguments: `rps`: Hooks and status for parsing extensions. `arch`: Full ISA string. */ bool riscv_parse_subset (riscv_parse_subset_t *rps, const char *arch) { const char *p; /* Init the riscv_ext_order array to compare the order of extensions quickly. */ riscv_init_ext_order (); if (arch == NULL) { riscv_set_default_arch (rps); riscv_parse_add_implicit_subsets (rps); return riscv_parse_check_conflicts (rps); } for (p = arch; *p != '\0'; p++) { if (ISUPPER (*p)) { rps->error_handler (_("%s: ISA string cannot contain uppercase letters"), arch); return false; } } p = arch; if (startswith (p, "rv32")) { *rps->xlen = 32; p += 4; } else if (startswith (p, "rv64")) { *rps->xlen = 64; p += 4; } else { /* ISA string shouldn't be NULL or empty here. For linker, it might be empty when we failed to merge the ISA string in the riscv_merge_attributes. For assembler, we might give an empty string by .attribute arch, "" or -march=. However, We have already issued the correct error message in another side, so do not issue this error when the ISA string is empty. */ if (strlen (arch)) rps->error_handler ( _("%s: ISA string must begin with rv32 or rv64"), arch); return false; } /* Parsing standard extension. */ p = riscv_parse_std_ext (rps, arch, p); if (p == NULL) return false; /* Parse the different classes of extensions in the specified order. */ while (*p != '\0') { p = riscv_parse_prefixed_ext (rps, arch, p); if (p == NULL) return false; } /* Finally add implicit extensions according to the current extensions. */ riscv_parse_add_implicit_subsets (rps); /* Check the conflicts. */ return riscv_parse_check_conflicts (rps); } /* Return the number of digits for the input. */ size_t riscv_estimate_digit (unsigned num) { size_t digit = 0; if (num == 0) return 1; for (digit = 0; num ; num /= 10) digit++; return digit; } /* Auxiliary function to estimate string length of subset list. */ static size_t riscv_estimate_arch_strlen1 (const riscv_subset_t *subset) { if (subset == NULL) return 6; /* For rv32/rv64/rv128 and string terminator. */ return riscv_estimate_arch_strlen1 (subset->next) + strlen (subset->name) + riscv_estimate_digit (subset->major_version) + 1 /* For version seperator 'p'. */ + riscv_estimate_digit (subset->minor_version) + 1 /* For underscore. */; } /* Estimate the string length of this subset list. */ static size_t riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list) { return riscv_estimate_arch_strlen1 (subset_list->head); } /* Auxiliary function to convert subset info to string. */ static void riscv_arch_str1 (riscv_subset_t *subset, char *attr_str, char *buf, size_t bufsz) { const char *underline = "_"; riscv_subset_t *subset_t = subset; if (subset_t == NULL) return; /* No underline between rvXX and i/e. */ if ((strcasecmp (subset_t->name, "i") == 0) || (strcasecmp (subset_t->name, "e") == 0)) underline = ""; snprintf (buf, bufsz, "%s%s%dp%d", underline, subset_t->name, subset_t->major_version, subset_t->minor_version); strncat (attr_str, buf, bufsz); /* Skip 'i' extension after 'e', or skip extensions which versions are unknown. */ while (subset_t->next && ((strcmp (subset_t->name, "e") == 0 && strcmp (subset_t->next->name, "i") == 0) || subset_t->next->major_version == RISCV_UNKNOWN_VERSION || subset_t->next->minor_version == RISCV_UNKNOWN_VERSION)) subset_t = subset_t->next; riscv_arch_str1 (subset_t->next, attr_str, buf, bufsz); } /* Convert subset information into string with explicit versions. */ char * riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset) { size_t arch_str_len = riscv_estimate_arch_strlen (subset); char *attr_str = xmalloc (arch_str_len); char *buf = xmalloc (arch_str_len); snprintf (attr_str, arch_str_len, "rv%u", xlen); riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len); free (buf); return attr_str; }