2013-02-07 00:22:26 +01:00
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/* Definitions for Altera Nios II assembler.
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2018-01-03 06:17:27 +01:00
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Copyright (C) 2012-2018 Free Software Foundation, Inc.
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2013-02-07 00:22:26 +01:00
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Contributed by Nigel Gray (ngray@altera.com).
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Contributed by Mentor Graphics, Inc.
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This file is part of GAS, the GNU Assembler.
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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, or (at your option)
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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 GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#ifndef TC_NIOS2
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#define TC_NIOS2
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/* If unspecified, default to little endian. We can explicitly specify
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* a big-endian default by configuring with --target=nios2eb-elf. We
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* can override the default with the -EB and -EL options. */
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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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/* Words are big enough to hold addresses. */
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#define WORKING_DOT_WORD 1
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#ifdef OBJ_ELF
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extern const char *nios2_target_format (void);
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#define TARGET_FORMAT nios2_target_format ()
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#define TARGET_ARCH bfd_arch_nios2
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#endif
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/* A NIOS2 instruction consists of tokens and separator characters
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the tokens are things like the instruction name (add, or jmp etc),
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the register indices ($5, $7 etc), and constant expressions. The
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separator characters are commas, brackets and space.
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The instruction name is always separated from other tokens by a space
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The maximum number of tokens in an instruction is 5 (the instruction name,
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2017-01-23 16:23:07 +01:00
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3 arguments, and a 4th string representing the expected instruct in opcode
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2013-02-07 00:22:26 +01:00
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after assembly. The latter is only used when the assemble is running in
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self test mode, otherwise its presence will generate an error. */
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#define NIOS2_MAX_INSN_TOKENS 6
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/* There are no machine-specific operands so we #define this to nothing. */
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#define md_operand(x)
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/* Function prototypes exported to rest of GAS. */
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extern void md_assemble (char *op_str);
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extern void md_end (void);
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extern void md_begin (void);
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#define TC_FORCE_RELOCATION(fixp) nios2_force_relocation (fixp)
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extern int nios2_force_relocation (struct fix *);
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#define tc_fix_adjustable(fixp) nios2_fix_adjustable (fixp)
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extern int nios2_fix_adjustable (struct fix *);
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#define tc_frob_label(lab) nios2_frob_label (lab)
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extern void nios2_frob_label (symbolS *);
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#define tc_frob_symbol(symp, punt) punt = nios2_frob_symbol (symp) ? 1 : punt
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extern int nios2_frob_symbol (symbolS * symp);
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#define md_cons_align(nbytes) nios2_cons_align (nbytes)
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extern void nios2_cons_align (int);
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extern void md_convert_frag (bfd * headers, segT sec, fragS * fragP);
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/* When relaxing, we need to generate relocations for alignment
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directives. */
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#define HANDLE_ALIGN(frag) nios2_handle_align (frag)
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extern void nios2_handle_align (fragS *);
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#define md_relax_frag nios2_relax_frag
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extern long nios2_relax_frag (segT segment, fragS * fragP, long stretch);
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#ifdef OBJ_ELF
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#define ELF_TC_SPECIAL_SECTIONS \
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{ ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
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{ ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
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{ ".lit4", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
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{ ".lit8", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
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/* Processor-specific section directives. */
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#define md_elf_section_letter nios2_elf_section_letter
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2016-04-01 14:07:50 +02:00
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extern int nios2_elf_section_letter (int, const char **);
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2013-02-07 00:22:26 +01:00
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#define md_elf_section_flags nios2_elf_section_flags
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extern flagword nios2_elf_section_flags (flagword, int, int);
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#endif
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#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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#define DIFF_EXPR_OK
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2017-02-28 01:08:51 +01:00
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/* Don't allow the generic code to convert fixups involving the
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subtraction of a label in the current section to pc-relative if we
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don't have the necessary pc-relative relocation. */
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#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
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(!((FIX)->fx_r_type == BFD_RELOC_16 \
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|| (FIX)->fx_r_type == BFD_RELOC_NIOS2_LO16 \
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|| (FIX)->fx_r_type == BFD_RELOC_NIOS2_HIADJ16))
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2013-02-07 00:22:26 +01:00
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/* Nios2 ABI doesn't have 32-bit PCREL relocation, and, as relocations for
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CFI information will be in section other than .text, we can't use PC-biased
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relocs. */
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#define CFI_DIFF_EXPR_OK 0
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#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) nios2_cons (EXP, NBYTES)
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gas TC_PARSE_CONS_EXPRESSION communication with TC_CONS_FIX_NEW
A number of targets pass extra information from TC_PARSE_CONS_EXPRESSION
to TC_CONS_FIX_NEW via static variables. That's OK, but not best
practice. tc-ppc.c goes further in implementing its own replacement
for cons(), because the generic one doesn't allow relocation modifiers
on constants. This patch fixes both of these warts.
* gas/config/tc-alpha.h (TC_CONS_FIX_NEW): Add RELOC parameter.
* gas/config/tc-arc.c (arc_cons_fix_new): Add reloc parameter.
* gas/config/tc-arc.h (arc_cons_fix_new): Update prototype.
(TC_CONS_FIX_NEW): Add RELOC parameter.
* gas/config/tc-arm.c (cons_fix_new_arm): Similarly
* gas/config/tc-arm.h (cons_fix_new_arm, TC_CONS_FIX_NEW): Similarly.
* gas/config/tc-cr16.c (cr16_cons_fix_new): Similarly.
* gas/config/tc-cr16.h (cr16_cons_fix_new, TC_CONS_FIX_NEW): Similarly.
* gas/config/tc-crx.h (TC_CONS_FIX_NEW): Similarly.
* gas/config/tc-m32c.c (m32c_cons_fix_new): Similarly.
* gas/config/tc-m32c.h (m32c_cons_fix_new, TC_CONS_FIX_NEW): Similarly.
* gas/config/tc-mn10300.c (mn10300_cons_fix_new): Similarly.
* gas/config/tc-mn10300.h (mn10300_cons_fix_new, TC_CONS_FIX_NEW):
Similarly.
* gas/config/tc-ns32k.c (cons_fix_new_ns32k): Similarly.
* gas/config/tc-ns32k.h (cons_fix_new_ns32k): Similarly.
* gas/config/tc-pj.c (pj_cons_fix_new_pj): Similarly.
* gas/config/tc-pj.h (pj_cons_fix_new_pj, TC_CONS_FIX_NEW): Similarly.
* gas/config/tc-rx.c (rx_cons_fix_new): Similarly.
* gas/config/tc-rx.h (rx_cons_fix_new, TC_CONS_FIX_NEW): Similarly.
* gas/config/tc-sh.c (sh_cons_fix_new): Similarly.
* gas/config/tc-sh.h (sh_cons_fix_new, TC_CONS_FIX_NEW): Similarly.
* gas/config/tc-tic54x.c (tic54x_cons_fix_new): Similarly.
* gas/config/tc-tic54x.h (tic54x_cons_fix_new, TC_CONS_FIX_NEW):
Similarly.
* gas/config/tc-tic6x.c (tic6x_cons_fix_new): Similarly.
* gas/config/tc-tic6x.h (tic6x_cons_fix_new, TC_CONS_FIX_NEW):
Similarly.
* gas/config/tc-arc.c (arc_parse_cons_expression): Return reloc.
* gas/config/tc-arc.h (arc_parse_cons_expression): Update proto.
* gas/config/tc-avr.c (exp_mod_data): Make global.
(pexp_mod_data): Delete.
(avr_parse_cons_expression): Return exp_mod_data pointer.
(avr_cons_fix_new): Add exp_mod_data_t pointer param.
(exp_mod_data_t): Move typedef..
* gas/config/tc-avr.h: ..to here.
(exp_mod_data): Declare.
(TC_PARSE_CONS_RETURN_TYPE, TC_PARSE_CONS_RETURN_NONE): Define.
(avr_parse_cons_expression, avr_cons_fix_new): Update prototype.
(TC_CONS_FIX_NEW): Update.
* gas/config/tc-hppa.c (hppa_field_selector): Delete static var.
(cons_fix_new_hppa): Add hppa_field_selector param.
(fix_new_hppa): Adjust.
(parse_cons_expression_hppa): Return field selector.
* gas/config/tc-hppa.h (parse_cons_expression_hppa): Update proto.
(cons_fix_new_hppa): Likewise.
(TC_PARSE_CONS_RETURN_TYPE, TC_PARSE_CONS_RETURN_NONE): Define.
* gas/config/tc-i386.c (got_reloc): Delete static var.
(x86_cons_fix_new): Add reloc param.
(x86_cons): Return got reloc.
* gas/config/tc-i386.h (x86_cons, x86_cons_fix_new): Update proto.
(TC_CONS_FIX_NEW): Add RELOC param.
* gas/config/tc-ia64.c (ia64_cons_fix_new): Add reloc param. Adjust
calls.
* gas/config/tc-ia64.h (ia64_cons_fix_new): Update prototype.
(TC_CONS_FIX_NEW): Add reloc param.
* gas/config/tc-microblaze.c (parse_cons_expression_microblaze):
Return reloc.
(cons_fix_new_microblaze): Add reloc param.
* gas/config/tc-microblaze.h: Formatting.
(parse_cons_expression_microblaze): Update proto.
(cons_fix_new_microblaze): Likewise.
* gas/config/tc-nios2.c (nios2_tls_ldo_reloc): Delete static var.
(nios2_cons): Return ldo reloc.
(nios2_cons_fix_new): Delete.
* gas/config/tc-nios2.h (nios2_cons): Update prototype.
(nios2_cons_fix_new, TC_CONS_FIX_NEW): Delete.
* gas/config/tc-ppc.c (md_pseudo_table): Remove quad, long, word,
short. Make llong use cons.
(ppc_elf_suffix): Return BFD_RELOC_NONE rather than BFD_RELOC_UNUSED.
(ppc_elf_cons): Delete.
(ppc_elf_parse_cons): New function.
(ppc_elf_validate_fix): Don't check for BFD_RELOC_UNUSED.
(md_assemble): Use BFD_RELOC_NONE rather than BFD_RELOC_UNUSED.
* gas/config/tc-ppc.h (TC_PARSE_CONS_EXPRESSION): Define
(ppc_elf_parse_cons): Declare.
* gas/config/tc-sparc.c (sparc_cons_special_reloc): Delete static var.
(sparc_cons): Return reloc specifier.
(cons_fix_new_sparc): Add reloc specifier param.
(sparc_cfi_emit_pcrel_expr): Use emit_expr_with_reloc.
* gas/config/tc-sparc.h (TC_PARSE_CONS_RETURN_TYPE): Define.
(TC_PARSE_CONS_RETURN_NONE): Define.
(sparc_cons, cons_fix_new_sparc): Update prototype.
* gas/config/tc-v850.c (hold_cons_reloc): Delete static var.
(v850_reloc_prefix): Use BFD_RELOC_NONE rather than BFD_RELOC_UNUSED.
(md_assemble): Likewise.
(parse_cons_expression_v850): Return reloc.
(cons_fix_new_v850): Add reloc parameter.
* gas/config/tc-v850.h (parse_cons_expression_v850): Update proto.
(cons_fix_new_v850): Likewise.
* gas/config/tc-vax.c (vax_cons_special_reloc): Delete static var.
(vax_cons): Return reloc.
(vax_cons_fix_new): Add reloc parameter.
* gas/config/tc-vax.h (vax_cons, vax_cons_fix_new): Update proto.
* gas/config/tc-xstormy16.c (xstormy16_cons_fix_new): Add reloc param.
* gas/config/tc-xstormy16.h (xstormy16_cons_fix_new): Update proto.
* gas/dwarf2dbg.c (TC_PARSE_CONS_RETURN_NONE): Provide default.
(emit_fixed_inc_line_addr): Adjust exmit_expr_fix calls.
* gas/read.c (TC_PARSE_CONS_EXPRESSION): Return value.
(do_parse_cons_expression): Adjust.
(cons_worker): Pass return value from TC_PARSE_CONS_EXPRESSION
to emit_expr_with_reloc.
(emit_expr_with_reloc): New function handling reloc, mostly
extracted from..
(emit_expr): ..here.
(emit_expr_fix): Add reloc param. Adjust TC_CONS_FIX_NEW invocation.
Handle reloc.
(parse_mri_cons): Convert to ISO.
* gas/read.h (TC_PARSE_CONS_RETURN_TYPE): Define.
(TC_PARSE_CONS_RETURN_NONE): Define.
(emit_expr_with_reloc): Declare.
(emit_expr_fix): Update prototype.
* gas/write.c (write_object_file): Update TC_CONS_FIX_NEW invocation.
2014-04-08 07:08:22 +02:00
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extern bfd_reloc_code_real_type nios2_cons (expressionS *exp, int size);
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2013-02-07 00:22:26 +01:00
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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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#define DWARF2_DEFAULT_RETURN_COLUMN 31
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#define DWARF2_CIE_DATA_ALIGNMENT (-4)
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#define tc_regname_to_dw2regnum nios2_regname_to_dw2regnum
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extern int nios2_regname_to_dw2regnum (char *regname);
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#define tc_cfi_frame_initial_instructions nios2_frame_initial_instructions
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extern void nios2_frame_initial_instructions (void);
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2015-07-02 00:55:28 +02:00
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#define elf_tc_final_processing nios2_elf_final_processing
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extern void nios2_elf_final_processing (void);
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2013-02-07 00:22:26 +01:00
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#endif /* TC_NIOS2 */
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