X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gas%2Fconfig%2Ftc-avr.h;h=d58222ec7757b6e6c5fc14769e7f5b0c17c0609f;hb=26c1e780920096772b5735250fa31a4184d2253c;hp=7aff4e2f80aac5e1eb4ca66e51cb0a73d7c00f20;hpb=94f592af1baedbbe3957436c713fd58c02d55ef9;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/config/tc-avr.h b/gas/config/tc-avr.h index 7aff4e2f80..d58222ec77 100644 --- a/gas/config/tc-avr.h +++ b/gas/config/tc-avr.h @@ -1,5 +1,5 @@ /* This file is tc-avr.h - Copyright 1999, 2000, 2001 Free Software Foundation, Inc. + Copyright (C) 1999-2019 Free Software Foundation, Inc. Contributed by Denis Chertykov @@ -7,7 +7,7 @@ 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, @@ -17,108 +17,231 @@ 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 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 DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */ -#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. */ +/* 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. */ - -extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); +/* 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 -/* 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. */ + +/* 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 *);