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Diffstat (limited to 'gas/config/tc-avr.c')
| -rw-r--r-- | gas/config/tc-avr.c | 1310 |
1 files changed, 0 insertions, 1310 deletions
diff --git a/gas/config/tc-avr.c b/gas/config/tc-avr.c deleted file mode 100644 index 0a85533bfd0..00000000000 --- a/gas/config/tc-avr.c +++ /dev/null @@ -1,1310 +0,0 @@ -/* tc-avr.c -- Assembler code for the ATMEL AVR - - Copyright 1999, 2000, 2001 Free Software Foundation, Inc. - Contributed by Denis Chertykov <denisc@overta.ru> - - 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 2, 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, 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <stdio.h> -#include "as.h" -#include "safe-ctype.h" -#include "subsegs.h" - -struct avr_opcodes_s -{ - char *name; - char *constraints; - int insn_size; /* In words. */ - int isa; - unsigned int bin_opcode; -}; - -#define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \ -{#NAME, CONSTR, SIZE, ISA, BIN}, - -struct avr_opcodes_s avr_opcodes[] = -{ - #include "opcode/avr.h" - {NULL, NULL, 0, 0, 0} -}; - -const char comment_chars[] = ";"; -const char line_comment_chars[] = "#"; -const char line_separator_chars[] = "$"; - -const char *md_shortopts = "m:"; -struct mcu_type_s -{ - char *name; - int isa; - int mach; -}; - -/* XXX - devices that don't seem to exist (renamed, replaced with larger - ones, or planned but never produced), left here for compatibility. - TODO: hide them in show_mcu_list output? */ - -static struct mcu_type_s mcu_types[] = -{ - {"avr1", AVR_ISA_TINY1, bfd_mach_avr1}, - {"avr2", AVR_ISA_2xxx, bfd_mach_avr2}, - {"avr3", AVR_ISA_M103, bfd_mach_avr3}, - {"avr4", AVR_ISA_M8, bfd_mach_avr4}, - {"avr5", AVR_ISA_ALL, bfd_mach_avr5}, - {"at90s1200", AVR_ISA_1200, bfd_mach_avr1}, - {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1}, /* XXX -> tn11 */ - {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1}, - {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1}, - {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1}, - {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1}, - {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2}, - {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2}, - {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 4433 */ - {"attiny22" , AVR_ISA_2xxx, bfd_mach_avr2}, - {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2}, - {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2}, - {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8515 */ - {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8535 */ - {"at90s8515", AVR_ISA_2xxx, bfd_mach_avr2}, - {"at90s8535", AVR_ISA_2xxx, bfd_mach_avr2}, - {"at90c8534", AVR_ISA_2xxx, bfd_mach_avr2}, - {"atmega603", AVR_ISA_M603, bfd_mach_avr3}, /* XXX -> m103 */ - {"atmega103", AVR_ISA_M103, bfd_mach_avr3}, - {"at43usb320",AVR_ISA_M103, bfd_mach_avr3}, - {"at76c711", AVR_ISA_M603, bfd_mach_avr3}, - {"atmega8", AVR_ISA_M8, bfd_mach_avr4}, - {"atmega83", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m163 */ - {"atmega85", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8 */ - {"atmega16", AVR_ISA_M323, bfd_mach_avr5}, - {"atmega161", AVR_ISA_M161, bfd_mach_avr5}, - {"atmega163", AVR_ISA_M161, bfd_mach_avr5}, - {"atmega32", AVR_ISA_M323, bfd_mach_avr5}, - {"atmega323", AVR_ISA_M323, bfd_mach_avr5}, - {"atmega64", AVR_ISA_M323, bfd_mach_avr5}, - {"atmega128", AVR_ISA_M128, bfd_mach_avr5}, - {"at43usb355",AVR_ISA_94K, bfd_mach_avr5}, - {"at94k", AVR_ISA_94K, bfd_mach_avr5}, - {NULL, 0, 0} -}; - -/* Current MCU type. */ -static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2}; -static struct mcu_type_s *avr_mcu = &default_mcu; - -/* AVR target-specific switches. */ -struct avr_opt_s -{ - int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes */ - int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns */ - int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around */ -}; - -static struct avr_opt_s avr_opt = { 0, 0, 0 }; - -const char EXP_CHARS[] = "eE"; -const char FLT_CHARS[] = "dD"; -static void avr_set_arch (int dummy); - -/* The target specific pseudo-ops which we support. */ -const pseudo_typeS md_pseudo_table[] = -{ - {"arch", avr_set_arch, 0}, - { NULL, NULL, 0} -}; - -#define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00)) - -static void show_mcu_list PARAMS ((FILE *)); -static char *skip_space PARAMS ((char *)); -static char *extract_word PARAMS ((char *, char *, int)); -static unsigned int avr_operand PARAMS ((struct avr_opcodes_s *, - int, char *, char **)); -static unsigned int avr_operands PARAMS ((struct avr_opcodes_s *, char **)); -static unsigned int avr_get_constant PARAMS ((char *, int)); -static char *parse_exp PARAMS ((char *, expressionS *)); -static bfd_reloc_code_real_type avr_ldi_expression PARAMS ((expressionS *)); - -#define EXP_MOD_NAME(i) exp_mod[i].name -#define EXP_MOD_RELOC(i) exp_mod[i].reloc -#define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc -#define HAVE_PM_P(i) exp_mod[i].have_pm - -struct exp_mod_s -{ - char *name; - bfd_reloc_code_real_type reloc; - bfd_reloc_code_real_type neg_reloc; - int have_pm; -}; - -static struct exp_mod_s exp_mod[] = -{ - {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1}, - {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0}, - {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1}, - {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0}, - {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1}, - {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0}, - {"hlo8", -BFD_RELOC_AVR_LO8_LDI, -BFD_RELOC_AVR_LO8_LDI_NEG, 0}, - {"hhi8", -BFD_RELOC_AVR_HI8_LDI, -BFD_RELOC_AVR_HI8_LDI_NEG, 0}, -}; - -/* Opcode hash table. */ -static struct hash_control *avr_hash; - -/* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */ -static struct hash_control *avr_mod_hash; - -#define OPTION_MMCU 'm' -#define OPTION_ALL_OPCODES (OPTION_MD_BASE + 1) -#define OPTION_NO_SKIP_BUG (OPTION_MD_BASE + 2) -#define OPTION_NO_WRAP (OPTION_MD_BASE + 3) - -struct option md_longopts[] = -{ - { "mmcu", required_argument, NULL, OPTION_MMCU }, - { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES }, - { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG }, - { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP }, - { NULL, no_argument, NULL, 0 } -}; - -size_t md_longopts_size = sizeof (md_longopts); - -/* Display nicely formatted list of known MCU names. */ - -static void -show_mcu_list (stream) - FILE *stream; -{ - int i, x; - - fprintf (stream, _("Known MCU names:")); - x = 1000; - - for (i = 0; mcu_types[i].name; i++) - { - int len = strlen (mcu_types[i].name); - - x += len + 1; - - if (x < 75) - fprintf (stream, " %s", mcu_types[i].name); - else - { - fprintf (stream, "\n %s", mcu_types[i].name); - x = len + 2; - } - } - - fprintf (stream, "\n"); -} - -static inline char * -skip_space (s) - char *s; -{ - while (*s == ' ' || *s == '\t') - ++s; - return s; -} - -/* Extract one word from FROM and copy it to TO. */ - -static char * -extract_word (char *from, char *to, int limit) -{ - char *op_start; - char *op_end; - int size = 0; - - /* Drop leading whitespace. */ - from = skip_space (from); - *to = 0; - - /* Find the op code end. */ - for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);) - { - to[size++] = *op_end++; - if (size + 1 >= limit) - break; - } - - to[size] = 0; - return op_end; -} - -int -md_estimate_size_before_relax (fragp, seg) - fragS *fragp ATTRIBUTE_UNUSED; - asection *seg ATTRIBUTE_UNUSED; -{ - abort (); - return 0; -} - -void -md_show_usage (stream) - FILE *stream; -{ - fprintf (stream, - _("AVR options:\n" - " -mmcu=[avr-name] select microcontroller variant\n" - " [avr-name] can be:\n" - " avr1 - AT90S1200, ATtiny1x, ATtiny28\n" - " avr2 - AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22\n" - " avr3 - ATmega103, ATmega603\n" - " avr4 - ATmega83, ATmega85\n" - " avr5 - ATmega161, ATmega163, ATmega32, AT94K\n" - " or immediate microcontroller name.\n")); - fprintf (stream, - _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n" - " -mno-skip-bug disable warnings for skipping two-word instructions\n" - " (default for avr4, avr5)\n" - " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n" - " (default for avr3, avr5)\n")); - show_mcu_list (stream); -} - -static void -avr_set_arch (dummy) - int dummy ATTRIBUTE_UNUSED; -{ - char *str; - - str = (char *) alloca (20); - input_line_pointer = extract_word (input_line_pointer, str, 20); - md_parse_option (OPTION_MMCU, str); - bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); -} - -int -md_parse_option (c, arg) - int c; - char *arg; -{ - switch (c) - { - case OPTION_MMCU: - { - int i; - char *s = alloca (strlen (arg) + 1); - - { - char *t = s; - char *arg1 = arg; - - do - *t = TOLOWER (*arg1++); - while (*t++); - } - - for (i = 0; mcu_types[i].name; ++i) - if (strcmp (mcu_types[i].name, s) == 0) - break; - - if (!mcu_types[i].name) - { - show_mcu_list (stderr); - as_fatal (_("unknown MCU: %s\n"), arg); - } - - /* It is OK to redefine mcu type within the same avr[1-5] bfd machine - type - this for allows passing -mmcu=... via gcc ASM_SPEC as well - as .arch ... in the asm output at the same time. */ - if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach) - avr_mcu = &mcu_types[i]; - else - as_fatal (_("redefinition of mcu type `%s' to `%s'"), - avr_mcu->name, mcu_types[i].name); - return 1; - } - case OPTION_ALL_OPCODES: - avr_opt.all_opcodes = 1; - return 1; - case OPTION_NO_SKIP_BUG: - avr_opt.no_skip_bug = 1; - return 1; - case OPTION_NO_WRAP: - avr_opt.no_wrap = 1; - return 1; - } - - return 0; -} - -symbolS * -md_undefined_symbol (name) - char *name ATTRIBUTE_UNUSED; -{ - return 0; -} - -/* Turn a string in input_line_pointer into a floating point constant - of type TYPE, and store the appropriate bytes in *LITP. The number - of LITTLENUMS emitted is stored in *SIZEP. An error message is - returned, or NULL on OK. */ - -char * -md_atof (type, litP, sizeP) - int type; - char *litP; - int *sizeP; -{ - int prec; - LITTLENUM_TYPE words[4]; - LITTLENUM_TYPE *wordP; - char *t; - - switch (type) - { - case 'f': - prec = 2; - break; - case 'd': - prec = 4; - break; - default: - *sizeP = 0; - return _("bad call to md_atof"); - } - - t = atof_ieee (input_line_pointer, type, words); - if (t) - input_line_pointer = t; - - *sizeP = prec * sizeof (LITTLENUM_TYPE); - - /* This loop outputs the LITTLENUMs in REVERSE order. */ - for (wordP = words + prec - 1; prec--;) - { - md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); - litP += sizeof (LITTLENUM_TYPE); - } - - return NULL; -} - -void -md_convert_frag (abfd, sec, fragP) - bfd *abfd ATTRIBUTE_UNUSED; - asection *sec ATTRIBUTE_UNUSED; - fragS *fragP ATTRIBUTE_UNUSED; -{ - abort (); -} - -void -md_begin () -{ - unsigned int i; - struct avr_opcodes_s *opcode; - avr_hash = hash_new (); - - /* Insert unique names into hash table. This hash table then provides a - quick index to the first opcode with a particular name in the opcode - table. */ - for (opcode = avr_opcodes; opcode->name; opcode++) - hash_insert (avr_hash, opcode->name, (char *) opcode); - - avr_mod_hash = hash_new (); - - for (i = 0; i < sizeof (exp_mod) / sizeof (exp_mod[0]); ++i) - hash_insert (avr_mod_hash, EXP_MOD_NAME (i), (void *) (i + 10)); - - bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); -} - -/* Resolve STR as a constant expression and return the result. - If result greater than MAX then error. */ - -static unsigned int -avr_get_constant (str, max) - char *str; - int max; -{ - expressionS ex; - str = skip_space (str); - input_line_pointer = str; - expression (&ex); - - if (ex.X_op != O_constant) - as_bad (_("constant value required")); - - if (ex.X_add_number > max || ex.X_add_number < 0) - as_bad (_("number must be less than %d"), max + 1); - - return ex.X_add_number; -} - -/* Parse instruction operands. - Return binary opcode. */ - -static unsigned int -avr_operands (opcode, line) - struct avr_opcodes_s *opcode; - char **line; -{ - char *op = opcode->constraints; - unsigned int bin = opcode->bin_opcode; - char *frag = frag_more (opcode->insn_size * 2); - char *str = *line; - int where = frag - frag_now->fr_literal; - static unsigned int prev = 0; /* Previous opcode. */ - - /* Opcode have operands. */ - if (*op) - { - unsigned int reg1 = 0; - unsigned int reg2 = 0; - int reg1_present = 0; - int reg2_present = 0; - - /* Parse first operand. */ - if (REGISTER_P (*op)) - reg1_present = 1; - reg1 = avr_operand (opcode, where, op, &str); - ++op; - - /* Parse second operand. */ - if (*op) - { - if (*op == ',') - ++op; - - if (*op == '=') - { - reg2 = reg1; - reg2_present = 1; - } - else - { - if (REGISTER_P (*op)) - reg2_present = 1; - - str = skip_space (str); - if (*str++ != ',') - as_bad (_("`,' required")); - str = skip_space (str); - - reg2 = avr_operand (opcode, where, op, &str); - - } - - if (reg1_present && reg2_present) - reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200); - else if (reg2_present) - reg2 <<= 4; - } - if (reg1_present) - reg1 <<= 4; - bin |= reg1 | reg2; - } - - /* Detect undefined combinations (like ld r31,Z+). */ - if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin)) - as_warn (_("undefined combination of operands")); - - if (opcode->insn_size == 2) - { - /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs - (AVR core bug, fixed in the newer devices). */ - - if (!(avr_opt.no_skip_bug || (avr_mcu->isa & AVR_ISA_MUL)) - && AVR_SKIP_P (prev)) - as_warn (_("skipping two-word instruction")); - - bfd_putl32 ((bfd_vma) bin, frag); - } - else - bfd_putl16 ((bfd_vma) bin, frag); - - prev = bin; - *line = str; - return bin; -} - -/* Parse one instruction operand. - Return operand bitmask. Also fixups can be generated. */ - -static unsigned int -avr_operand (opcode, where, op, line) - struct avr_opcodes_s *opcode; - int where; - char *op; - char **line; -{ - expressionS op_expr; - unsigned int op_mask = 0; - char *str = skip_space (*line); - - switch (*op) - { - /* Any register operand. */ - case 'w': - case 'd': - case 'r': - case 'a': - case 'v': - if (*str == 'r' || *str == 'R') - { - char r_name[20]; - - str = extract_word (str, r_name, sizeof (r_name)); - op_mask = 0xff; - if (ISDIGIT (r_name[1])) - { - if (r_name[2] == '\0') - op_mask = r_name[1] - '0'; - else if (r_name[1] != '0' - && ISDIGIT (r_name[2]) - && r_name[3] == '\0') - op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0'; - } - } - else - { - op_mask = avr_get_constant (str, 31); - str = input_line_pointer; - } - - if (op_mask <= 31) - { - switch (*op) - { - case 'a': - if (op_mask < 16 || op_mask > 23) - as_bad (_("register r16-r23 required")); - op_mask -= 16; - break; - - case 'd': - if (op_mask < 16) - as_bad (_("register number above 15 required")); - op_mask -= 16; - break; - - case 'v': - if (op_mask & 1) - as_bad (_("even register number required")); - op_mask >>= 1; - break; - - case 'w': - if ((op_mask & 1) || op_mask < 24) - as_bad (_("register r24, r26, r28 or r30 required")); - op_mask = (op_mask - 24) >> 1; - break; - } - break; - } - as_bad (_("register name or number from 0 to 31 required")); - break; - - case 'e': - { - char c; - - if (*str == '-') - { - str = skip_space (str + 1); - op_mask = 0x1002; - } - c = TOLOWER (*str); - if (c == 'x') - op_mask |= 0x100c; - else if (c == 'y') - op_mask |= 0x8; - else if (c != 'z') - as_bad (_("pointer register (X, Y or Z) required")); - - str = skip_space (str + 1); - if (*str == '+') - { - ++str; - if (op_mask & 2) - as_bad (_("cannot both predecrement and postincrement")); - op_mask |= 0x1001; - } - - /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer - registers, no predecrement, no postincrement. */ - if (!avr_opt.all_opcodes && (op_mask & 0x100F) - && !(avr_mcu->isa & AVR_ISA_SRAM)) - as_bad (_("addressing mode not supported")); - } - break; - - case 'z': - if (*str == '-') - as_bad (_("can't predecrement")); - - if (! (*str == 'z' || *str == 'Z')) - as_bad (_("pointer register Z required")); - - str = skip_space (str + 1); - - if (*str == '+') - { - ++str; - op_mask |= 1; - } - break; - - case 'b': - { - char c = TOLOWER (*str++); - - if (c == 'y') - op_mask |= 0x8; - else if (c != 'z') - as_bad (_("pointer register (Y or Z) required")); - str = skip_space (str); - if (*str++ == '+') - { - unsigned int x; - x = avr_get_constant (str, 63); - str = input_line_pointer; - op_mask |= (x & 7) | ((x & (3 << 3)) << 7) | ((x & (1 << 5)) << 8); - } - } - break; - - case 'h': - str = parse_exp (str, &op_expr); - fix_new_exp (frag_now, where, opcode->insn_size * 2, - &op_expr, false, BFD_RELOC_AVR_CALL); - break; - - case 'L': - str = parse_exp (str, &op_expr); - fix_new_exp (frag_now, where, opcode->insn_size * 2, - &op_expr, true, BFD_RELOC_AVR_13_PCREL); - break; - - case 'l': - str = parse_exp (str, &op_expr); - fix_new_exp (frag_now, where, opcode->insn_size * 2, - &op_expr, true, BFD_RELOC_AVR_7_PCREL); - break; - - case 'i': - str = parse_exp (str, &op_expr); - fix_new_exp (frag_now, where + 2, opcode->insn_size * 2, - &op_expr, false, BFD_RELOC_16); - break; - - case 'M': - { - bfd_reloc_code_real_type r_type; - - input_line_pointer = str; - r_type = avr_ldi_expression (&op_expr); - str = input_line_pointer; - fix_new_exp (frag_now, where, 3, - &op_expr, false, r_type); - } - break; - - case 'n': - { - unsigned int x; - - x = ~avr_get_constant (str, 255); - str = input_line_pointer; - op_mask |= (x & 0xf) | ((x << 4) & 0xf00); - } - break; - - case 'K': - { - unsigned int x; - - x = avr_get_constant (str, 63); - str = input_line_pointer; - op_mask |= (x & 0xf) | ((x & 0x30) << 2); - } - break; - - case 'S': - case 's': - { - unsigned int x; - - x = avr_get_constant (str, 7); - str = input_line_pointer; - if (*op == 'S') - x <<= 4; - op_mask |= x; - } - break; - - case 'P': - { - unsigned int x; - - x = avr_get_constant (str, 63); - str = input_line_pointer; - op_mask |= (x & 0xf) | ((x & 0x30) << 5); - } - break; - - case 'p': - { - unsigned int x; - - x = avr_get_constant (str, 31); - str = input_line_pointer; - op_mask |= x << 3; - } - break; - - case '?': - break; - - default: - as_bad (_("unknown constraint `%c'"), *op); - } - - *line = str; - return op_mask; -} - -/* GAS will call this function for each section at the end of the assembly, - to permit the CPU backend to adjust the alignment of a section. */ - -valueT -md_section_align (seg, addr) - asection *seg; - valueT addr; -{ - int align = bfd_get_section_alignment (stdoutput, seg); - return ((addr + (1 << align) - 1) & (-1 << align)); -} - -/* 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. */ - -long -md_pcrel_from_section (fixp, sec) - fixS *fixp; - segT sec; -{ - if (fixp->fx_addsy != (symbolS *) NULL - && (!S_IS_DEFINED (fixp->fx_addsy) - || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) - return 0; - - return fixp->fx_frag->fr_address + fixp->fx_where; -} - -/* GAS will call this for each fixup. It should store the correct - value in the object file. */ - -void -md_apply_fix3 (fixP, valP, seg) - fixS *fixP; - valueT * valP; - segT seg; -{ - unsigned char *where; - unsigned long insn; - long value = * (long *) valP; - - if (fixP->fx_addsy == (symbolS *) NULL) - fixP->fx_done = 1; - - else if (fixP->fx_pcrel) - { - segT s = S_GET_SEGMENT (fixP->fx_addsy); - - if (fixP->fx_addsy && (s == seg || s == absolute_section)) - { - value += S_GET_VALUE (fixP->fx_addsy); - fixP->fx_done = 1; - } - } - else - { - value = fixP->fx_offset; - - if (fixP->fx_subsy != (symbolS *) NULL) - { - if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section) - { - value -= S_GET_VALUE (fixP->fx_subsy); - fixP->fx_done = 1; - } - else - { - /* We don't actually support subtracting a symbol. */ - as_bad_where (fixP->fx_file, fixP->fx_line, - _("expression too complex")); - } - } - } - - switch (fixP->fx_r_type) - { - default: - fixP->fx_no_overflow = 1; - break; - case BFD_RELOC_AVR_7_PCREL: - case BFD_RELOC_AVR_13_PCREL: - case BFD_RELOC_32: - case BFD_RELOC_16: - case BFD_RELOC_AVR_CALL: - break; - } - - if (fixP->fx_done) - { - /* Fetch the instruction, insert the fully resolved operand - value, and stuff the instruction back again. */ - where = fixP->fx_frag->fr_literal + fixP->fx_where; - insn = bfd_getl16 (where); - - switch (fixP->fx_r_type) - { - case BFD_RELOC_AVR_7_PCREL: - if (value & 1) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("odd address operand: %ld"), value); - - /* Instruction addresses are always right-shifted by 1. */ - value >>= 1; - --value; /* Correct PC. */ - - if (value < -64 || value > 63) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("operand out of range: %ld"), value); - value = (value << 3) & 0x3f8; - bfd_putl16 ((bfd_vma) (value | insn), where); - break; - - case BFD_RELOC_AVR_13_PCREL: - if (value & 1) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("odd address operand: %ld"), value); - - /* Instruction addresses are always right-shifted by 1. */ - value >>= 1; - --value; /* Correct PC. */ - - if (value < -2048 || value > 2047) - { - /* No wrap for devices with >8K of program memory. */ - if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("operand out of range: %ld"), value); - } - - value &= 0xfff; - bfd_putl16 ((bfd_vma) (value | insn), where); - break; - - case BFD_RELOC_32: - bfd_putl16 ((bfd_vma) value, where); - break; - - case BFD_RELOC_16: - bfd_putl16 ((bfd_vma) value, where); - break; - - case BFD_RELOC_AVR_16_PM: - bfd_putl16 ((bfd_vma) (value >> 1), where); - break; - - case BFD_RELOC_AVR_LO8_LDI: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where); - break; - - case -BFD_RELOC_AVR_LO8_LDI: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); - break; - - case BFD_RELOC_AVR_HI8_LDI: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where); - break; - - case -BFD_RELOC_AVR_HI8_LDI: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where); - break; - - case BFD_RELOC_AVR_HH8_LDI: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); - break; - - case BFD_RELOC_AVR_LO8_LDI_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where); - break; - - case -BFD_RELOC_AVR_LO8_LDI_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); - break; - - case BFD_RELOC_AVR_HI8_LDI_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where); - break; - - case -BFD_RELOC_AVR_HI8_LDI_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where); - break; - - case BFD_RELOC_AVR_HH8_LDI_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); - break; - - case BFD_RELOC_AVR_LO8_LDI_PM: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where); - break; - - case BFD_RELOC_AVR_HI8_LDI_PM: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where); - break; - - case BFD_RELOC_AVR_HH8_LDI_PM: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where); - break; - - case BFD_RELOC_AVR_LO8_LDI_PM_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where); - break; - - case BFD_RELOC_AVR_HI8_LDI_PM_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where); - break; - - case BFD_RELOC_AVR_HH8_LDI_PM_NEG: - bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where); - break; - - case BFD_RELOC_AVR_CALL: - { - unsigned long x; - - x = bfd_getl16 (where); - if (value & 1) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("odd address operand: %ld"), value); - value >>= 1; - x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16; - bfd_putl16 ((bfd_vma) x, where); - bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2); - } - break; - - default: - as_fatal (_("line %d: unknown relocation type: 0x%x"), - fixP->fx_line, fixP->fx_r_type); - break; - } - } - else - { - switch (fixP->fx_r_type) - { - case -BFD_RELOC_AVR_HI8_LDI_NEG: - case -BFD_RELOC_AVR_HI8_LDI: - case -BFD_RELOC_AVR_LO8_LDI_NEG: - case -BFD_RELOC_AVR_LO8_LDI: - as_bad_where (fixP->fx_file, fixP->fx_line, - _("only constant expression allowed")); - fixP->fx_done = 1; - break; - default: - break; - } - fixP->fx_addnumber = value; - } -} - -/* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS - will pass the resulting reloc to `bfd_install_relocation'. This - currently works poorly, as `bfd_install_relocation' often does the - wrong thing, and instances of `tc_gen_reloc' have been written to - work around the problems, which in turns makes it difficult to fix - `bfd_install_relocation'. */ - -/* If while processing a fixup, a reloc really needs to be created - then it is done here. */ - -arelent * -tc_gen_reloc (seg, fixp) - asection *seg ATTRIBUTE_UNUSED; - fixS *fixp; -{ - arelent *reloc; - - reloc = (arelent *) xmalloc (sizeof (arelent)); - - reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); - *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); - - reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; - reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); - if (reloc->howto == (reloc_howto_type *) NULL) - { - as_bad_where (fixp->fx_file, fixp->fx_line, - _("reloc %d not supported by object file format"), - (int) fixp->fx_r_type); - return NULL; - } - - if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT - || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) - reloc->address = fixp->fx_offset; - - reloc->addend = fixp->fx_offset; - - return reloc; -} - -void -md_assemble (str) - char *str; -{ - struct avr_opcodes_s *opcode; - char op[11]; - - str = skip_space (extract_word (str, op, sizeof (op))); - - if (!op[0]) - as_bad (_("can't find opcode ")); - - opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op); - - if (opcode == NULL) - { - as_bad (_("unknown opcode `%s'"), op); - return; - } - - /* Special case for opcodes with optional operands (lpm, elpm) - - version with operands exists in avr_opcodes[] in the next entry. */ - - if (*str && *opcode->constraints == '?') - ++opcode; - - if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa) - as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name); - - /* We used to set input_line_pointer to the result of get_operands, - but that is wrong. Our caller assumes we don't change it. */ - { - char *t = input_line_pointer; - avr_operands (opcode, &str); - if (*skip_space (str)) - as_bad (_("garbage at end of line")); - input_line_pointer = t; - } -} - -/* Parse ordinary expression. */ - -static char * -parse_exp (s, op) - char *s; - expressionS *op; -{ - input_line_pointer = s; - expression (op); - if (op->X_op == O_absent) - as_bad (_("missing operand")); - return input_line_pointer; -} - -/* Parse special expressions (needed for LDI command): - xx8 (address) - xx8 (-address) - pm_xx8 (address) - pm_xx8 (-address) - where xx is: hh, hi, lo. */ - -static bfd_reloc_code_real_type -avr_ldi_expression (exp) - expressionS *exp; -{ - char *str = input_line_pointer; - char *tmp; - char op[8]; - int mod; - tmp = str; - - str = extract_word (str, op, sizeof (op)); - - if (op[0]) - { - mod = (int) hash_find (avr_mod_hash, op); - - if (mod) - { - int closes = 0; - - mod -= 10; - str = skip_space (str); - - if (*str == '(') - { - int neg_p = 0; - - ++str; - - if (strncmp ("pm(", str, 3) == 0 - || strncmp ("-(pm(", str, 5) == 0) - { - if (HAVE_PM_P (mod)) - { - ++mod; - ++closes; - } - else - as_bad (_("illegal expression")); - - if (*str == '-') - { - neg_p = 1; - ++closes; - str += 5; - } - else - str += 3; - } - - if (*str == '-' && *(str + 1) == '(') - { - neg_p ^= 1; - ++closes; - str += 2; - } - - input_line_pointer = str; - expression (exp); - - do - { - if (*input_line_pointer != ')') - { - as_bad (_("`)' required")); - break; - } - input_line_pointer++; - } - while (closes--); - - return neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod); - } - } - } - - input_line_pointer = tmp; - expression (exp); - - /* Warn about expressions that fail to use lo8 (). */ - if (exp->X_op == O_constant) - { - int x = exp->X_add_number; - if (x < -255 || x > 255) - as_warn (_("constant out of 8-bit range: %d"), x); - } - else - as_warn (_("expression possibly out of 8-bit range")); - - return BFD_RELOC_AVR_LO8_LDI; -} - -/* Flag to pass `pm' mode between `avr_parse_cons_expression' and - `avr_cons_fix_new'. */ -static int exp_mod_pm = 0; - -/* Parse special CONS expression: pm (expression) - which is used for addressing to a program memory. - Relocation: BFD_RELOC_AVR_16_PM. */ - -void -avr_parse_cons_expression (exp, nbytes) - expressionS *exp; - int nbytes; -{ - char *tmp; - - exp_mod_pm = 0; - - tmp = input_line_pointer = skip_space (input_line_pointer); - - if (nbytes == 2) - { - char *pm_name = "pm"; - int len = strlen (pm_name); - - if (strncasecmp (input_line_pointer, pm_name, len) == 0) - { - input_line_pointer = skip_space (input_line_pointer + len); - - if (*input_line_pointer == '(') - { - input_line_pointer = skip_space (input_line_pointer + 1); - exp_mod_pm = 1; - expression (exp); - - if (*input_line_pointer == ')') - ++input_line_pointer; - else - { - as_bad (_("`)' required")); - exp_mod_pm = 0; - } - - return; - } - - input_line_pointer = tmp; - } - } - - expression (exp); -} - -void -avr_cons_fix_new (frag, where, nbytes, exp) - fragS *frag; - int where; - int nbytes; - expressionS *exp; -{ - if (exp_mod_pm == 0) - { - if (nbytes == 2) - fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_16); - else if (nbytes == 4) - fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_32); - else - as_bad (_("illegal %srelocation size: %d"), "", nbytes); - } - else - { - if (nbytes == 2) - fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_AVR_16_PM); - else - as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes); - exp_mod_pm = 0; - } -} |