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- /* Definitions for TI PRU assembler.
- Copyright (C) 2014-2022 Free Software Foundation, Inc.
- Contributed by Dimitar Dimitrov <dimitar@dinux.eu>
- This file is part of GAS, the GNU Assembler.
- GAS 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, or (at your option)
- any later version.
- GAS 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 GAS; see the file COPYING. If not, write to the Free
- Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA. */
- #ifndef __TC_PRU__
- #define __TC_PRU__
- #define TARGET_BYTES_BIG_ENDIAN 0
- /* Words are big enough to hold addresses. */
- #define WORKING_DOT_WORD 1
- extern const char *pru_target_format (void);
- #define TARGET_FORMAT pru_target_format ()
- #define TARGET_ARCH bfd_arch_pru
- /* A PRU instruction consists of tokens and separator characters
- the tokens are things like the instruction name (add, or jmp etc),
- the register indices ($5, $7 etc), and constant expressions. The
- separator characters are commas, brackets and space.
- The instruction name is always separated from other tokens by a space
- The maximum number of tokens in an instruction is 6 (the instruction name,
- 4 arguments, and a 4th string representing the expected instruction opcode
- after assembly. The latter is only used when the assemble is running in
- self test mode, otherwise its presence will generate an error. */
- #define PRU_MAX_INSN_TOKENS 7
- /* There are no machine-specific operands so we #define this to nothing. */
- #define md_operand(x)
- /* Function prototypes exported to rest of GAS. */
- extern void md_assemble (char *op_str);
- extern void md_end (void);
- extern void md_begin (void);
- #define tc_fix_adjustable(fixp) pru_fix_adjustable (fixp)
- extern int pru_fix_adjustable (struct fix *);
- #define tc_frob_label(lab) pru_frob_label (lab)
- extern void pru_frob_label (symbolS *);
- extern void md_convert_frag (bfd * headers, segT sec, fragS * fragP);
- #define DIFF_EXPR_OK
- /* FIXME This seems appropriate, given that we intentionally prevent
- PRU's .text from being used in a DIFF expression with symbols from
- other sections. Revisit once GDB is ported. */
- #define CFI_DIFF_EXPR_OK 0
- #define TC_PARSE_CONS_RETURN_TYPE int
- #define TC_PARSE_CONS_RETURN_NONE 0
- #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
- pru_parse_cons_expression (EXP, NBYTES)
- extern int pru_parse_cons_expression (expressionS *exp, int size);
- #define TC_CONS_FIX_NEW pru_cons_fix_new
- extern void pru_cons_fix_new (struct frag *frag, int where,
- unsigned int nbytes, struct expressionS *exp,
- const int is_pmem);
- /* If you define this macro, it means that `tc_gen_reloc' may return
- multiple relocation entries for a single fixup. In this case, the
- return value of `tc_gen_reloc' is a pointer to a null terminated
- array. */
- #undef RELOC_EXPANSION_POSSIBLE
- /* No shared lib support, so we don't need to ensure externally
- visible symbols can be overridden. */
- #define EXTERN_FORCE_RELOC 0
- /* If defined, this macro allows control over whether fixups for a
- given section will be processed when the linkrelax variable is
- set. Define it to zero and handle things in md_apply_fix instead. */
- #define TC_LINKRELAX_FIXUP(SEG) 0
- /* If this macro returns non-zero, it guarantees that a relocation will be
- emitted even when the value can be resolved locally. Do that if
- linkrelax is turned on. */
- #define TC_FORCE_RELOCATION(fix) pru_force_relocation (fix)
- #define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
- (GENERIC_FORCE_RELOCATION_SUB_SAME (fix, seg) || pru_force_relocation (fix))
- extern int pru_force_relocation (struct fix *);
- /* Do not use PC relative fixups and relocations for
- anything but real PCREL relocations. */
- #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
- (((FIX)->fx_r_type != BFD_RELOC_PRU_S10_PCREL) \
- && ((FIX)->fx_r_type != BFD_RELOC_PRU_U8_PCREL))
- /* Values passed to md_apply_fix don't include the symbol value. */
- #define MD_APPLY_SYM_VALUE(FIX) 0
- /* We don't want gas to fixup the following memory related relocations.
- We will need them in case that we want to do linker relaxation.
- We could in principle keep these fixups in gas when not relaxing.
- However, there is no serious performance penalty when making the linker
- make the fixup work. Check also that fx_addsy is not NULL, in order to
- make sure that the fixup refers to some sort of label. */
- #define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \
- if ((FIXP->fx_r_type == BFD_RELOC_PRU_LDI32 \
- || FIXP->fx_r_type == BFD_RELOC_PRU_U16 \
- || FIXP->fx_r_type == BFD_RELOC_PRU_U16_PMEMIMM \
- || FIXP->fx_r_type == BFD_RELOC_PRU_S10_PCREL \
- || FIXP->fx_r_type == BFD_RELOC_PRU_U8_PCREL \
- || FIXP->fx_r_type == BFD_RELOC_PRU_32_PMEM \
- || FIXP->fx_r_type == BFD_RELOC_PRU_16_PMEM) \
- && FIXP->fx_addsy != NULL \
- && FIXP->fx_subsy == NULL) \
- { \
- symbol_mark_used_in_reloc (FIXP->fx_addsy); \
- goto SKIP; \
- }
- /* This macro is evaluated for any fixup with a fx_subsy that
- fixup_segment cannot reduce to a number. If the macro returns
- false an error will be reported. */
- #define TC_VALIDATE_FIX_SUB(fix, seg) pru_validate_fix_sub (fix)
- extern int pru_validate_fix_sub (struct fix *);
- /* We want .cfi_* pseudo-ops for generating unwind info. */
- #define TARGET_USE_CFIPOP 1
- /* Program Counter register number is not defined by TI documents.
- Pick the virtual number used by GCC. */
- #define DWARF2_DEFAULT_RETURN_COLUMN 132
- /* The stack grows down, and is only byte aligned. */
- #define DWARF2_CIE_DATA_ALIGNMENT -1
- #define tc_regname_to_dw2regnum pru_regname_to_dw2regnum
- extern int pru_regname_to_dw2regnum (char *regname);
- #define tc_cfi_frame_initial_instructions pru_frame_initial_instructions
- extern void pru_frame_initial_instructions (void);
- /* The difference between same-section symbols may be affected by linker
- relaxation, so do not resolve such expressions in the assembler. */
- #define md_allow_local_subtract(l,r,s) pru_allow_local_subtract (l, r, s)
- extern bool pru_allow_local_subtract (expressionS *, expressionS *, segT);
- #endif /* __TC_PRU__ */
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