161 lines
6.5 KiB
C
161 lines
6.5 KiB
C
/* Definitions for TI PRU assembler.
|
|
Copyright (C) 2014-2019 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 bfd_boolean pru_allow_local_subtract (expressionS *, expressionS *,
|
|
segT);
|
|
|
|
#endif /* __TC_PRU__ */
|