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0b4eac57c4
Allow st_other values such as STO_AARCH64_VARIANT_PCS to be set for alias symbols independently. This is needed for ifunc symbols which are aliased to the resolver using .set and don't expect resolver attributes to override the ifunc symbol attributes. This means .variant_pcs must be added explicitly to aliases. gas/ChangeLog: * config/tc-aarch64.c (aarch64_elf_copy_symbol_attributes): Define. * config/tc-aarch64.h (aarch64_elf_copy_symbol_attributes): Declare. (OBJ_COPY_SYMBOL_ATTRIBUTES): Define. * testsuite/gas/aarch64/symbol-variant_pcs-3.d: New test. * testsuite/gas/aarch64/symbol-variant_pcs-3.s: New test.
286 lines
9.0 KiB
C
286 lines
9.0 KiB
C
/* tc-aarch64.h -- Header file for tc-aarch64.c.
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Copyright (C) 2009-2019 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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This file is part of GAS.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the license, or
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(at your option) any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING3. If not,
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see <http://www.gnu.org/licenses/>. */
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#ifndef TC_AARCH64
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#define TC_AARCH64 1
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#include "opcode/aarch64.h"
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#ifndef TARGET_BYTES_BIG_ENDIAN
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#define TARGET_BYTES_BIG_ENDIAN 0
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#endif
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#define WORKING_DOT_WORD
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#define TARGET_ARCH bfd_arch_aarch64
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#define DIFF_EXPR_OK
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/* Permit // comments. */
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#define DOUBLESLASH_LINE_COMMENTS
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#ifdef LITTLE_ENDIAN
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#undef LITTLE_ENDIAN
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#endif
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#ifdef BIG_ENDIAN
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#undef BIG_ENDIAN
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#endif
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#define LITTLE_ENDIAN 1234
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#define BIG_ENDIAN 4321
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#define SWAP_32(n) \
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((((n) & 0xff) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) \
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| (((n) >> 24) & 0xff))
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struct fix;
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struct aarch64_fix
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{
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struct aarch64_inst *inst;
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enum aarch64_opnd opnd;
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};
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#if defined OBJ_ELF
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# define AARCH64_BI_ENDIAN
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# define TARGET_FORMAT elf64_aarch64_target_format ()
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#endif
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#define TC_FORCE_RELOCATION(FIX) aarch64_force_relocation (FIX)
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/* Currently there is no machine specific frags generated. */
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#define md_convert_frag(b,s,f) as_fatal ("aarch64 convert_frag called\n")
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#define md_cleanup() aarch64_cleanup ()
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#define md_start_line_hook() aarch64_start_line_hook ()
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#define tc_frob_label(S) aarch64_frob_label (S)
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/* We also need to mark assembler created symbols: */
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#define tc_frob_fake_label(S) aarch64_frob_label (S)
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#define tc_frob_section(S) aarch64_frob_section (S)
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/* The key used to sign a function's return address. */
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enum pointer_auth_key {
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AARCH64_PAUTH_KEY_A,
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AARCH64_PAUTH_KEY_B
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};
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/* The extra fields required by AArch64 in fde_entry and cie_entry. Currently
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only used to store the key used to sign the frame's return address. */
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#define tc_fde_entry_extras enum pointer_auth_key pauth_key;
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#define tc_cie_entry_extras enum pointer_auth_key pauth_key;
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/* The extra initialisation steps needed by AArch64 in alloc_fde_entry.
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Currently only used to initialise the key used to sign the return
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address. */
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#define tc_fde_entry_init_extra(fde) fde->pauth_key = AARCH64_PAUTH_KEY_A;
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/* Extra checks required by AArch64 when outputting the current cie_entry.
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Currently only used to output a 'B' if the return address is signed with the
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B key. */
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#define tc_output_cie_extra(cie) \
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do \
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{ \
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if (cie->pauth_key == AARCH64_PAUTH_KEY_B) \
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out_one ('B'); \
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} \
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while (0)
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/* Extra equivalence checks required by AArch64 when selecting the correct cie
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for some fde. Currently only used to check for quivalence between keys used
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to sign ther return address. */
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#define tc_cie_fde_equivalent_extra(cie, fde) (cie->pauth_key == fde->pauth_key)
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/* The extra initialisation steps needed by AArch64 in select_cie_for_fde.
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Currently only used to initialise the key used to sign the return
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address. */
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#define tc_cie_entry_init_extra(cie, fde) cie->pauth_key = fde->pauth_key;
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#define TC_FIX_TYPE struct aarch64_fix
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#define TC_INIT_FIX_DATA(FIX) { (FIX)->tc_fix_data.inst = NULL; \
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(FIX)->tc_fix_data.opnd = AARCH64_OPND_NIL; }
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#define TC_SYMFIELD_TYPE unsigned int
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#define AARCH64_GET_FLAG(s) (*symbol_get_tc (s))
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void aarch64_copy_symbol_attributes (symbolS *, symbolS *);
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#ifndef TC_COPY_SYMBOL_ATTRIBUTES
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#define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
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(aarch64_copy_symbol_attributes (DEST, SRC))
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#endif
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#ifdef OBJ_ELF
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void aarch64_elf_copy_symbol_attributes (symbolS *, symbolS *);
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#define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
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aarch64_elf_copy_symbol_attributes (DEST, SRC)
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#endif
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#define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) \
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(NEXT_CHAR == ':' || (NEXT_CHAR == '/' && aarch64_data_in_code ()))
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#define tc_canonicalize_symbol_name(str) aarch64_canonicalize_symbol_name (str);
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#define obj_adjust_symtab() aarch64_adjust_symtab ()
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#define LISTING_HEADER "AARCH64 GAS "
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#define LOCAL_LABEL(name) (name[0] == '.' && name[1] == 'L')
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#define LOCAL_LABELS_FB 1
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/* This expression evaluates to true if the relocation is for a local
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object for which we still want to do the relocation at runtime.
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False if we are willing to perform this relocation while building
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the .o file. GOTOFF does not need to be checked here because it is
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not pcrel. I am not sure if some of the others are ever used with
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pcrel, but it is easier to be safe than sorry. */
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#define TC_FORCE_RELOCATION_LOCAL(FIX) \
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(GENERIC_FORCE_RELOCATION_LOCAL (FIX) \
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|| (FIX)->fx_r_type == BFD_RELOC_64 \
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|| (FIX)->fx_r_type == BFD_RELOC_32)
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#define TC_CONS_FIX_NEW(f,w,s,e,r) cons_fix_new_aarch64 ((f), (w), (s), (e))
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/* Max space for a rs_align_code fragment is 3 unaligned bytes
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(fr_fix) plus 4 bytes to contain the repeating NOP (fr_var). */
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#define MAX_MEM_FOR_RS_ALIGN_CODE 7
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/* For frags in code sections we need to record whether they contain
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code or data. */
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struct aarch64_frag_type
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{
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int recorded;
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#ifdef OBJ_ELF
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/* If there is a mapping symbol at offset 0 in this frag,
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it will be saved in FIRST_MAP. If there are any mapping
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symbols in this frag, the last one will be saved in
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LAST_MAP. */
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symbolS *first_map, *last_map;
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#endif
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};
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#define TC_FRAG_TYPE struct aarch64_frag_type
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#define TC_FRAG_INIT(fragp, max_bytes) aarch64_init_frag (fragp, max_bytes)
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#define HANDLE_ALIGN(fragp) aarch64_handle_align (fragp)
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#define md_do_align(N, FILL, LEN, MAX, LABEL) \
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if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \
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{ \
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frag_align_code (N, MAX); \
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goto LABEL; \
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}
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#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
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#define DWARF2_LINE_MIN_INSN_LENGTH 4
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/* The lr register is r30. */
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#define DWARF2_DEFAULT_RETURN_COLUMN 30
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/* Registers are generally saved at negative offsets to the CFA. */
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#define DWARF2_CIE_DATA_ALIGNMENT (-8)
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extern int aarch64_dwarf2_addr_size (void);
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#define DWARF2_ADDR_SIZE(bfd) aarch64_dwarf2_addr_size ()
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#ifdef OBJ_ELF
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# define obj_frob_symbol(sym, punt) aarch64elf_frob_symbol ((sym), & (punt))
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# define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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# define TC_SEGMENT_INFO_TYPE struct aarch64_segment_info_type
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/* This is not really an alignment operation, but it's something we
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need to do at the same time: whenever we are figuring out the
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alignment for data, we should check whether a $d symbol is
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necessary. */
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# define md_cons_align(nbytes) mapping_state (MAP_DATA)
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enum mstate
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{
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MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */
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MAP_DATA,
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MAP_INSN,
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};
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void mapping_state (enum mstate);
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struct aarch64_segment_info_type
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{
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enum mstate mapstate;
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unsigned int marked_pr_dependency;
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aarch64_instr_sequence insn_sequence;
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};
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/* We want .cfi_* pseudo-ops for generating unwind info. */
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#define TARGET_USE_CFIPOP 1
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/* CFI hooks. */
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#define tc_regname_to_dw2regnum tc_aarch64_regname_to_dw2regnum
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#define tc_cfi_frame_initial_instructions tc_aarch64_frame_initial_instructions
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extern void aarch64_after_parse_args (void);
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#define md_after_parse_args() aarch64_after_parse_args ()
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#else /* Not OBJ_ELF. */
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#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
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#endif
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#if defined OBJ_ELF || defined OBJ_COFF
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# define EXTERN_FORCE_RELOC 1
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# define tc_fix_adjustable(FIX) 1
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/* Values passed to md_apply_fix don't include the symbol value. */
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# define MD_APPLY_SYM_VALUE(FIX) 0
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#endif
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#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
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extern long md_pcrel_from_section (struct fix *, segT);
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extern void aarch64_frag_align_code (int, int);
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extern const char * elf64_aarch64_target_format (void);
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extern int aarch64_force_relocation (struct fix *);
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extern void aarch64_cleanup (void);
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extern void aarch64_start_line_hook (void);
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extern void aarch64_frob_label (symbolS *);
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extern void aarch64_frob_section (asection *sec);
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extern int aarch64_data_in_code (void);
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extern char * aarch64_canonicalize_symbol_name (char *);
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extern void aarch64_adjust_symtab (void);
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extern void aarch64elf_frob_symbol (symbolS *, int *);
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extern void cons_fix_new_aarch64 (fragS *, int, int, expressionS *);
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extern void aarch64_init_frag (struct frag *, int);
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extern void aarch64_handle_align (struct frag *);
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extern int tc_aarch64_regname_to_dw2regnum (char *regname);
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extern void tc_aarch64_frame_initial_instructions (void);
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#ifdef TE_PE
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#define O_secrel O_md1
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#define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset
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void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
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#endif /* TE_PE */
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#endif /* TC_AARCH64 */
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