/* This file is tc-avr.h
- Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1999-2019 Free Software Foundation, Inc.
Contributed by Denis Chertykov <denisc@overta.ru>
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 2, or (at your option)
+ 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,
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, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
-
-#ifndef BFD_ASSEMBLER
- #error AVR support requires BFD_ASSEMBLER
-#endif
-
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+/* By convention, you should define this macro in the `.h' file. For
+ example, `tc-m68k.h' defines `TC_M68K'. You might have to use this
+ if it is necessary to add CPU specific code to the object format
+ file. */
#define TC_AVR
-/* By convention, you should define this macro in the `.h' file. For
- example, `tc-m68k.h' defines `TC_M68K'. You might have to use this
- if it is necessary to add CPU specific code to the object format
- file. */
+/* This macro is the BFD target name to use when creating the output
+ file. This will normally depend upon the `OBJ_FMT' macro. */
#define TARGET_FORMAT "elf32-avr"
-/* This macro is the BFD target name to use when creating the output
- file. This will normally depend upon the `OBJ_FMT' macro. */
+/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
#define TARGET_ARCH bfd_arch_avr
-/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
+/* This macro is the BFD machine number to pass to
+ `bfd_set_arch_mach'. If it is not defined, GAS will use 0. */
#define TARGET_MACH 0
-/* This macro is the BFD machine number to pass to
- `bfd_set_arch_mach'. If it is not defined, GAS will use 0. */
+/* You should define this macro to be non-zero if the target is big
+ endian, and zero if the target is little endian. */
#define TARGET_BYTES_BIG_ENDIAN 0
-/* You should define this macro to be non-zero if the target is big
- endian, and zero if the target is little endian. */
+/* If you define this macro, GAS will warn about the use of
+ nonstandard escape sequences in a string. */
#define ONLY_STANDARD_ESCAPES
-/* If you define this macro, GAS will warn about the use of
- nonstandard escape sequences in a string. */
-
-#define md_operand(x)
-/* GAS will call this function for any expression that can not be
- recognized. When the function is called, `input_line_pointer'
- will point to the start of the expression. */
-void avr_parse_cons_expression (expressionS *exp, int nbytes);
+#define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */
-#define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR,N)
-/*
- You may define this macro to parse an expression used in a data
- allocation pseudo-op such as `.word'. You can use this to
- recognize relocation directives that may appear in such directives.*/
-
-void avr_cons_fix_new(fragS *frag,int where, int nbytes, expressionS *exp);
-
-#define TC_CONS_FIX_NEW(FRAG,WHERE,N,EXP) avr_cons_fix_new(FRAG,WHERE,N,EXP)
-/* You may define this macro to generate a fixup for a data
- allocation pseudo-op. */
+/* GAS will call this function for any expression that can not be
+ recognized. When the function is called, `input_line_pointer'
+ will point to the start of the expression. */
+#define md_operand(x)
+typedef struct
+{
+ /* Name of the expression modifier allowed with .byte, .word, etc. */
+ const char *name;
+
+ /* Only allowed with n bytes of data. */
+ int nbytes;
+
+ /* Associated RELOC. */
+ bfd_reloc_code_real_type reloc;
+
+ /* Part of the error message. */
+ const char *error;
+} exp_mod_data_t;
+
+extern const exp_mod_data_t exp_mod_data[];
+#define TC_PARSE_CONS_RETURN_TYPE const exp_mod_data_t *
+#define TC_PARSE_CONS_RETURN_NONE exp_mod_data
+
+/* You may define this macro to parse an expression used in a data
+ allocation pseudo-op such as `.word'. You can use this to
+ recognize relocation directives that may appear in such directives. */
+#define TC_PARSE_CONS_EXPRESSION(EXPR,N) avr_parse_cons_expression (EXPR, N)
+extern const exp_mod_data_t *avr_parse_cons_expression (expressionS *, int);
+
+/* You may define this macro to generate a fixup for a data
+ allocation pseudo-op. */
+#define TC_CONS_FIX_NEW avr_cons_fix_new
+extern void avr_cons_fix_new (fragS *,int, int, expressionS *,
+ const exp_mod_data_t *);
+
+/* This should just call either `number_to_chars_bigendian' or
+ `number_to_chars_littleendian', whichever is appropriate. On
+ targets like the MIPS which support options to change the
+ endianness, which function to call is a runtime decision. On
+ other targets, `md_number_to_chars' can be a simple macro. */
#define md_number_to_chars number_to_chars_littleendian
-/* This should just call either `number_to_chars_bigendian' or
- `number_to_chars_littleendian', whichever is appropriate. On
- targets like the MIPS which support options to change the
- endianness, which function to call is a runtime decision. On
- other targets, `md_number_to_chars' can be a simple macro. */
+/* `md_short_jump_size'
+ `md_long_jump_size'
+ `md_create_short_jump'
+ `md_create_long_jump'
+ If `WORKING_DOT_WORD' is defined, GAS will not do broken word
+ processing (*note Broken words::.). Otherwise, you should set
+ `md_short_jump_size' to the size of a short jump (a jump that is
+ just long enough to jump around a long jmp) and
+ `md_long_jump_size' to the size of a long jump (a jump that can go
+ anywhere in the function), You should define
+ `md_create_short_jump' to create a short jump around a long jump,
+ and define `md_create_long_jump' to create a long jump. */
#define WORKING_DOT_WORD
-/*
-`md_short_jump_size'
-`md_long_jump_size'
-`md_create_short_jump'
-`md_create_long_jump'
- If `WORKING_DOT_WORD' is defined, GAS will not do broken word
- processing (*note Broken words::.). Otherwise, you should set
- `md_short_jump_size' to the size of a short jump (a jump that is
- just long enough to jump around a long jmp) and
- `md_long_jump_size' to the size of a long jump (a jump that can go
- anywhere in the function), You should define
- `md_create_short_jump' to create a short jump around a long jump,
- and define `md_create_long_jump' to create a long jump. */
-
-#define MD_APPLY_FIX3
-
-#define TC_HANDLES_FX_DONE
+/* 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
-/* 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. */
-
-#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
-/* If you define this macro, it should return the offset between the
- address of a PC relative fixup and the position from which the PC
- relative adjustment should be made. On many processors, the base
- of a PC relative instruction is the next instruction, so this
- macro would return the length of an instruction. */
+/* 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) avr_force_relocation (fix)
+#define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
+ (GENERIC_FORCE_RELOCATION_SUB_SAME (fix, seg) \
+ || avr_force_relocation (fix))
+extern int avr_force_relocation (struct fix *);
+
+/* Values passed to md_apply_fix don't include the symbol value. */
+#define MD_APPLY_SYM_VALUE(FIX) 0
+
+/* If you define this macro, it should return the offset between the
+ address of a PC relative fixup and the position from which the PC
+ relative adjustment should be made. On many processors, the base
+ of a PC relative instruction is the next instruction, so this
+ macro would return the length of an instruction. */
+#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
+extern long md_pcrel_from_section (struct fix *, segT);
+
+/* The number of bytes to put into a word in a listing. This affects
+ the way the bytes are clumped together in the listing. For
+ example, a value of 2 might print `1234 5678' where a value of 1
+ would print `12 34 56 78'. The default value is 4. */
#define LISTING_WORD_SIZE 2
-/* The number of bytes to put into a word in a listing. This affects
- the way the bytes are clumped together in the listing. For
- example, a value of 2 might print `1234 5678' where a value of 1
- would print `12 34 56 78'. The default value is 4. */
+/* AVR port uses `$' as a logical line separator. */
#define LEX_DOLLAR 0
-/* AVR port uses `$' as a logical line separator */
+
+/* An `.lcomm' directive with no explicit alignment parameter will
+ use this macro to set P2VAR to the alignment that a request for
+ SIZE bytes will have. The alignment is expressed as a power of
+ two. If no alignment should take place, the macro definition
+ should do nothing. Some targets define a `.bss' directive that is
+ also affected by this macro. The default definition will set
+ P2VAR to the truncated power of two of sizes up to eight bytes. */
+#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
+
+/* We don't want gas to fixup the following program 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_AVR_7_PCREL \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_13_PCREL \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_LO8_LDI_PM \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_LO8_LDI_GS \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_HI8_LDI_PM \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_HI8_LDI_GS \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_HH8_LDI_PM \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_LO8_LDI_PM_NEG \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_HI8_LDI_PM_NEG \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_HH8_LDI_PM_NEG \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_8_LO \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_8_HI \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_8_HLO \
+ || FIXP->fx_r_type == BFD_RELOC_AVR_16_PM) \
+ && 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) avr_validate_fix_sub (fix)
+extern int avr_validate_fix_sub (struct fix *);
+
+/* This target is buggy, and sets fix size too large. */
+#define TC_FX_SIZE_SLACK(FIX) 2
+
+/* AVR instructions are 2 or 4 bytes long. */
+#define DWARF2_LINE_MIN_INSN_LENGTH 2
+
+/* 32 bits pseudo-addresses are used on AVR. */
+#define DWARF2_ADDR_SIZE(bfd) 4
+
+/* Enable cfi directives. */
+#define TARGET_USE_CFIPOP 1
+
+/* The stack grows down, and is only byte aligned. */
+#define DWARF2_CIE_DATA_ALIGNMENT -1
+
+/* Define the column that represents the PC. */
+#define DWARF2_DEFAULT_RETURN_COLUMN 36
+
+/* Define a hook to setup initial CFI state. */
+extern void tc_cfi_frame_initial_instructions (void);
+#define tc_cfi_frame_initial_instructions tc_cfi_frame_initial_instructions
+
+/* 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) avr_allow_local_subtract (l, r, s)
+extern bfd_boolean avr_allow_local_subtract (expressionS *, expressionS *, segT);
+
+#define elf_tc_final_processing avr_elf_final_processing
+extern void avr_elf_final_processing (void);
+
+#define md_pre_output_hook avr_pre_output_hook ()
+extern void avr_pre_output_hook (void);
+
+#define md_undefined_symbol avr_undefined_symbol
+extern symbolS* avr_undefined_symbol (char*);
+
+#define md_post_relax_hook avr_post_relax_hook ()
+extern void avr_post_relax_hook (void);
+
+#define HANDLE_ALIGN(fragP) avr_handle_align (fragP)
+extern void avr_handle_align (fragS *);
+
+struct avr_frag_data
+{
+ unsigned is_org : 1;
+ unsigned is_align : 1;
+ unsigned has_fill : 1;
+
+ char fill;
+ offsetT alignment;
+ unsigned int prev_opcode;
+};
+#define TC_FRAG_TYPE struct avr_frag_data
+#define TC_FRAG_INIT(frag, max_bytes) avr_frag_init (frag)
+extern void avr_frag_init (fragS *);
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