X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gas%2Fconfig%2Ftc-avr.h;h=d58222ec7757b6e6c5fc14769e7f5b0c17c0609f;hb=546053acfa1518063ed0ea94c3e35c05089c32fc;hp=dceb0b75cd13084841078f8742ff983097c53dc0;hpb=4b4da1607aeed19ac399963a3aa12b0417e477ae;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/config/tc-avr.h b/gas/config/tc-avr.h index dceb0b75cd..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, 2002 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, @@ -20,10 +20,6 @@ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ -#ifndef BFD_ASSEMBLER - #error AVR support requires BFD_ASSEMBLER -#endif - /* 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 @@ -49,21 +45,43 @@ nonstandard escape sequences in a string. */ #define ONLY_STANDARD_ESCAPES +#define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */ + /* 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) -void avr_parse_cons_expression (expressionS *exp, int nbytes); +#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(FRAG,WHERE,N,EXP) avr_cons_fix_new(FRAG,WHERE,N,EXP) -void avr_cons_fix_new(fragS *frag,int where, int nbytes, expressionS *exp); +#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 @@ -96,7 +114,20 @@ void avr_cons_fix_new(fragS *frag,int where, int nbytes, expressionS *exp); visible symbols can be overridden. */ #define EXTERN_FORCE_RELOC 0 -/* Values passed to md_apply_fix3 don't include the symbol value. */ +/* 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 @@ -104,8 +135,8 @@ void avr_cons_fix_new(fragS *frag,int where, int nbytes, expressionS *exp); 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 PARAMS ((struct fix *, segT)); +#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 @@ -113,7 +144,7 @@ extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); would print `12 34 56 78'. The default value is 4. */ #define LISTING_WORD_SIZE 2 -/* AVR port uses `$' as a logical line separator */ +/* AVR port uses `$' as a logical line separator. */ #define LEX_DOLLAR 0 /* An `.lcomm' directive with no explicit alignment parameter will @@ -124,3 +155,93 @@ extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); 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 *);