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155 lines
6.4 KiB
C
155 lines
6.4 KiB
C
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/* Definitions for TI PRU assembler.
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Copyright (C) 2014-2017 Free Software Foundation, Inc.
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Contributed by Dimitar Dimitrov <dimitar@dinux.eu>
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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_PRU__
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#define __TC_PRU__
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#define TARGET_BYTES_BIG_ENDIAN 0
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/* Words are big enough to hold addresses. */
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#define WORKING_DOT_WORD 1
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extern const char *pru_target_format (void);
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#define TARGET_FORMAT pru_target_format ()
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#define TARGET_ARCH bfd_arch_pru
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/* A PRU 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 6 (the instruction name,
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4 arguments, and a 4th string representing the expected instruction opcode
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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 PRU_MAX_INSN_TOKENS 7
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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_fix_adjustable(fixp) pru_fix_adjustable (fixp)
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extern int pru_fix_adjustable (struct fix *);
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#define tc_frob_label(lab) pru_frob_label (lab)
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extern void pru_frob_label (symbolS *);
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extern void md_convert_frag (bfd * headers, segT sec, fragS * fragP);
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#define DIFF_EXPR_OK
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/* FIXME This seems appropriate, given that we intentionally prevent
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PRU's .text from being used in a DIFF expression with symbols from
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other sections. Revisit once GDB is ported. */
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#define CFI_DIFF_EXPR_OK 0
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#define TC_PARSE_CONS_RETURN_TYPE int
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#define TC_PARSE_CONS_RETURN_NONE 0
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#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
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pru_parse_cons_expression (EXP, NBYTES)
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extern int pru_parse_cons_expression (expressionS *exp, int size);
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#define TC_CONS_FIX_NEW pru_cons_fix_new
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extern void pru_cons_fix_new (struct frag *frag, int where,
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unsigned int nbytes, struct expressionS *exp,
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const int is_pmem);
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/* If you define this macro, it means that `tc_gen_reloc' may return
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multiple relocation entries for a single fixup. In this case, the
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return value of `tc_gen_reloc' is a pointer to a null terminated
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array. */
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#undef RELOC_EXPANSION_POSSIBLE
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/* No shared lib support, so we don't need to ensure externally
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visible symbols can be overridden. */
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#define EXTERN_FORCE_RELOC 0
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/* If defined, this macro allows control over whether fixups for a
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given section will be processed when the linkrelax variable is
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set. Define it to zero and handle things in md_apply_fix instead. */
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#define TC_LINKRELAX_FIXUP(SEG) 0
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/* If this macro returns non-zero, it guarantees that a relocation will be
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emitted even when the value can be resolved locally. Do that if
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linkrelax is turned on. */
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#define TC_FORCE_RELOCATION(fix) pru_force_relocation (fix)
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#define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
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(GENERIC_FORCE_RELOCATION_SUB_SAME (fix, seg) || pru_force_relocation (fix))
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extern int pru_force_relocation (struct fix *);
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/* Do not use PC relative fixups and relocations for
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anything but real PCREL relocations. */
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#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
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(((FIX)->fx_r_type != BFD_RELOC_PRU_S10_PCREL) \
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&& ((FIX)->fx_r_type != BFD_RELOC_PRU_U8_PCREL))
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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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/* We don't want gas to fixup the following memory related relocations.
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We will need them in case that we want to do linker relaxation.
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We could in principle keep these fixups in gas when not relaxing.
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However, there is no serious performance penalty when making the linker
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make the fixup work. Check also that fx_addsy is not NULL, in order to
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make sure that the fixup refers to some sort of label. */
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#define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \
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if ((FIXP->fx_r_type == BFD_RELOC_PRU_LDI32 \
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|| FIXP->fx_r_type == BFD_RELOC_PRU_U16 \
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|| FIXP->fx_r_type == BFD_RELOC_PRU_U16_PMEMIMM \
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|| FIXP->fx_r_type == BFD_RELOC_PRU_S10_PCREL \
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|| FIXP->fx_r_type == BFD_RELOC_PRU_U8_PCREL \
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|| FIXP->fx_r_type == BFD_RELOC_PRU_32_PMEM \
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|| FIXP->fx_r_type == BFD_RELOC_PRU_16_PMEM) \
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&& FIXP->fx_addsy != NULL \
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&& FIXP->fx_subsy == NULL) \
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{ \
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symbol_mark_used_in_reloc (FIXP->fx_addsy); \
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goto SKIP; \
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}
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/* This macro is evaluated for any fixup with a fx_subsy that
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fixup_segment cannot reduce to a number. If the macro returns
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false an error will be reported. */
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#define TC_VALIDATE_FIX_SUB(fix, seg) pru_validate_fix_sub (fix)
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extern int pru_validate_fix_sub (struct fix *);
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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 pru_regname_to_dw2regnum
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extern int pru_regname_to_dw2regnum (char *regname);
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#define tc_cfi_frame_initial_instructions pru_frame_initial_instructions
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extern void pru_frame_initial_instructions (void);
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/* The difference between same-section symbols may be affected by linker
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relaxation, so do not resolve such expressions in the assembler. */
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#define md_allow_local_subtract(l,r,s) pru_allow_local_subtract (l, r, s)
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extern bfd_boolean pru_allow_local_subtract (expressionS *, expressionS *,
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segT);
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#endif /* __TC_PRU__ */
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