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Diffstat (limited to 'gas/config/tc-arm.c')
| -rw-r--r-- | gas/config/tc-arm.c | 7117 |
1 files changed, 0 insertions, 7117 deletions
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c deleted file mode 100644 index 19ead2e3b73..00000000000 --- a/gas/config/tc-arm.c +++ /dev/null @@ -1,7117 +0,0 @@ -/* tc-arm.c -- Assemble for the ARM - Copyright (C) 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. - Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) - Modified by David Taylor (dtaylor@armltd.co.uk) - - 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 <ctype.h> -#include <string.h> -#define NO_RELOC 0 -#include "as.h" - -/* need TARGET_CPU */ -#include "config.h" -#include "subsegs.h" -#include "obstack.h" -#include "symbols.h" -#include "listing.h" - -#ifdef OBJ_ELF -#include "elf/arm.h" -#endif - -/* Types of processor to assemble for. */ -#define ARM_1 0x00000001 -#define ARM_2 0x00000002 -#define ARM_3 0x00000004 -#define ARM_250 ARM_3 -#define ARM_6 0x00000008 -#define ARM_7 ARM_6 /* same core instruction set */ -#define ARM_8 ARM_6 /* same core instruction set */ -#define ARM_9 ARM_6 /* same core instruction set */ -#define ARM_CPU_MASK 0x0000000f - -/* The following bitmasks control CPU extensions (ARM7 onwards): */ -#define ARM_LONGMUL 0x00000010 /* allow long multiplies */ -#define ARM_HALFWORD 0x00000020 /* allow half word loads */ -#define ARM_THUMB 0x00000040 /* allow BX instruction */ -#define ARM_EXT_V5 0x00000080 /* allow CLZ etc */ -#define ARM_EXT_V5E 0x00000200 /* "El Segundo" */ - -/* Architectures are the sum of the base and extensions */ -#define ARM_ARCH_V4 (ARM_7 | ARM_LONGMUL | ARM_HALFWORD) -#define ARM_ARCH_V4T (ARM_ARCH_V4 | ARM_THUMB) -#define ARM_ARCH_V5 (ARM_ARCH_V4 | ARM_EXT_V5) -#define ARM_ARCH_V5T (ARM_ARCH_V5 | ARM_THUMB) - -/* Some useful combinations: */ -#define ARM_ANY 0x00ffffff -#define ARM_2UP (ARM_ANY - ARM_1) -#define ARM_ALL ARM_2UP /* Not arm1 only */ -#define ARM_3UP 0x00fffffc -#define ARM_6UP 0x00fffff8 /* Includes ARM7 */ - -#define FPU_CORE 0x80000000 -#define FPU_FPA10 0x40000000 -#define FPU_FPA11 0x40000000 -#define FPU_NONE 0 - -/* Some useful combinations */ -#define FPU_ALL 0xff000000 /* Note this is ~ARM_ANY */ -#define FPU_MEMMULTI 0x7f000000 /* Not fpu_core */ - - -#ifndef CPU_DEFAULT -#if defined __thumb__ -#define CPU_DEFAULT (ARM_ARCH_V4 | ARM_THUMB) -#else -#define CPU_DEFAULT ARM_ALL -#endif -#endif - -#ifndef FPU_DEFAULT -#define FPU_DEFAULT FPU_ALL -#endif - -#define streq(a, b) (strcmp (a, b) == 0) -#define skip_whitespace(str) while (* (str) == ' ') ++ (str) - -static unsigned long cpu_variant = CPU_DEFAULT | FPU_DEFAULT; -static int target_oabi = 0; - -#if defined OBJ_COFF || defined OBJ_ELF -/* Flags stored in private area of BFD structure */ -static boolean uses_apcs_26 = false; -static boolean support_interwork = false; -static boolean uses_apcs_float = false; -static boolean pic_code = false; -#endif - -/* This array holds the chars that always start a comment. If the - pre-processor is disabled, these aren't very useful */ -CONST char comment_chars[] = "@"; - -/* This array holds the chars that only start a comment at the beginning of - a line. If the line seems to have the form '# 123 filename' - .line and .file directives will appear in the pre-processed output */ -/* Note that input_file.c hand checks for '#' at the beginning of the - first line of the input file. This is because the compiler outputs - #NO_APP at the beginning of its output. */ -/* Also note that comments like this one will always work. */ -CONST char line_comment_chars[] = "#"; - -#ifdef TE_LINUX -CONST char line_separator_chars[] = ";"; -#else -CONST char line_separator_chars[] = ""; -#endif - -/* Chars that can be used to separate mant from exp in floating point nums */ -CONST char EXP_CHARS[] = "eE"; - -/* Chars that mean this number is a floating point constant */ -/* As in 0f12.456 */ -/* or 0d1.2345e12 */ - -CONST char FLT_CHARS[] = "rRsSfFdDxXeEpP"; - -/* Prefix characters that indicate the start of an immediate - value. */ -#define is_immediate_prefix(C) ((C) == '#' || (C) == '$') - -#ifdef OBJ_ELF -symbolS * GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ -#endif - -CONST int md_reloc_size = 8; /* Size of relocation record */ - -static int thumb_mode = 0; /* 0: assemble for ARM, 1: assemble for Thumb, - 2: assemble for Thumb even though target cpu - does not support thumb instructions */ -typedef struct arm_fix -{ - int thumb_mode; -} arm_fix_data; - -struct arm_it -{ - CONST char * error; - unsigned long instruction; - int suffix; - int size; - struct - { - bfd_reloc_code_real_type type; - expressionS exp; - int pc_rel; - } reloc; -}; - -struct arm_it inst; - -struct asm_shift -{ - CONST char * template; - unsigned long value; -}; - -static CONST struct asm_shift shift[] = -{ - {"asl", 0}, - {"lsl", 0}, - {"lsr", 0x00000020}, - {"asr", 0x00000040}, - {"ror", 0x00000060}, - {"rrx", 0x00000060}, - {"ASL", 0}, - {"LSL", 0}, - {"LSR", 0x00000020}, - {"ASR", 0x00000040}, - {"ROR", 0x00000060}, - {"RRX", 0x00000060} -}; - -#define NO_SHIFT_RESTRICT 1 -#define SHIFT_RESTRICT 0 - -#define NUM_FLOAT_VALS 8 - -CONST char * fp_const[] = -{ - "0.0", "1.0", "2.0", "3.0", "4.0", "5.0", "0.5", "10.0", 0 -}; - -/* Number of littlenums required to hold an extended precision number */ -#define MAX_LITTLENUMS 6 - -LITTLENUM_TYPE fp_values[NUM_FLOAT_VALS][MAX_LITTLENUMS]; - -#define FAIL (-1) -#define SUCCESS (0) - -#define SUFF_S 1 -#define SUFF_D 2 -#define SUFF_E 3 -#define SUFF_P 4 - -#define CP_T_X 0x00008000 -#define CP_T_Y 0x00400000 -#define CP_T_Pre 0x01000000 -#define CP_T_UD 0x00800000 -#define CP_T_WB 0x00200000 - -#define CONDS_BIT (0x00100000) -#define LOAD_BIT (0x00100000) -#define TRANS_BIT (0x00200000) - -struct asm_cond -{ - CONST char * template; - unsigned long value; -}; - -/* This is to save a hash look-up in the common case */ -#define COND_ALWAYS 0xe0000000 - -static CONST struct asm_cond conds[] = -{ - {"eq", 0x00000000}, - {"ne", 0x10000000}, - {"cs", 0x20000000}, {"hs", 0x20000000}, - {"cc", 0x30000000}, {"ul", 0x30000000}, {"lo", 0x30000000}, - {"mi", 0x40000000}, - {"pl", 0x50000000}, - {"vs", 0x60000000}, - {"vc", 0x70000000}, - {"hi", 0x80000000}, - {"ls", 0x90000000}, - {"ge", 0xa0000000}, - {"lt", 0xb0000000}, - {"gt", 0xc0000000}, - {"le", 0xd0000000}, - {"al", 0xe0000000}, - {"nv", 0xf0000000} -}; - -/* Warning: If the top bit of the set_bits is set, then the standard - instruction bitmask is ignored, and the new bitmask is taken from - the set_bits: */ -struct asm_flg -{ - CONST char * template; /* Basic flag string */ - unsigned long set_bits; /* Bits to set */ -}; - -static CONST struct asm_flg s_flag[] = -{ - {"s", CONDS_BIT}, - {NULL, 0} -}; - -static CONST struct asm_flg ldr_flags[] = -{ - {"b", 0x00400000}, - {"t", TRANS_BIT}, - {"bt", 0x00400000 | TRANS_BIT}, - {"h", 0x801000b0}, - {"sh", 0x801000f0}, - {"sb", 0x801000d0}, - {NULL, 0} -}; - -static CONST struct asm_flg str_flags[] = -{ - {"b", 0x00400000}, - {"t", TRANS_BIT}, - {"bt", 0x00400000 | TRANS_BIT}, - {"h", 0x800000b0}, - {NULL, 0} -}; - -static CONST struct asm_flg byte_flag[] = -{ - {"b", 0x00400000}, - {NULL, 0} -}; - -static CONST struct asm_flg cmp_flags[] = -{ - {"s", CONDS_BIT}, - {"p", 0x0010f000}, - {NULL, 0} -}; - -static CONST struct asm_flg ldm_flags[] = -{ - {"ed", 0x01800000}, - {"fd", 0x00800000}, - {"ea", 0x01000000}, - {"fa", 0x08000000}, - {"ib", 0x01800000}, - {"ia", 0x00800000}, - {"db", 0x01000000}, - {"da", 0x08000000}, - {NULL, 0} -}; - -static CONST struct asm_flg stm_flags[] = -{ - {"ed", 0x08000000}, - {"fd", 0x01000000}, - {"ea", 0x00800000}, - {"fa", 0x01800000}, - {"ib", 0x01800000}, - {"ia", 0x00800000}, - {"db", 0x01000000}, - {"da", 0x08000000}, - {NULL, 0} -}; - -static CONST struct asm_flg lfm_flags[] = -{ - {"fd", 0x00800000}, - {"ea", 0x01000000}, - {NULL, 0} -}; - -static CONST struct asm_flg sfm_flags[] = -{ - {"fd", 0x01000000}, - {"ea", 0x00800000}, - {NULL, 0} -}; - -static CONST struct asm_flg round_flags[] = -{ - {"p", 0x00000020}, - {"m", 0x00000040}, - {"z", 0x00000060}, - {NULL, 0} -}; - -/* The implementation of the FIX instruction is broken on some assemblers, - in that it accepts a precision specifier as well as a rounding specifier, - despite the fact that this is meaningless. To be more compatible, we - accept it as well, though of course it does not set any bits. */ -static CONST struct asm_flg fix_flags[] = -{ - {"p", 0x00000020}, - {"m", 0x00000040}, - {"z", 0x00000060}, - {"sp", 0x00000020}, - {"sm", 0x00000040}, - {"sz", 0x00000060}, - {"dp", 0x00000020}, - {"dm", 0x00000040}, - {"dz", 0x00000060}, - {"ep", 0x00000020}, - {"em", 0x00000040}, - {"ez", 0x00000060}, - {NULL, 0} -}; - -static CONST struct asm_flg except_flag[] = -{ - {"e", 0x00400000}, - {NULL, 0} -}; - -static CONST struct asm_flg cplong_flag[] = -{ - {"l", 0x00400000}, - {NULL, 0} -}; - -struct asm_psr -{ - CONST char * template; - unsigned long number; -}; - -#define PSR_FIELD_MASK 0x000f0000 - -#define PSR_FLAGS 0x00080000 -#define PSR_CONTROL 0x00010000 /* Undocumented instruction, its use is discouraged by ARM */ -#define PSR_ALL 0x00090000 - -#define CPSR_ALL 0 -#define SPSR_ALL 1 -#define CPSR_FLG 2 -#define SPSR_FLG 3 -#define CPSR_CTL 4 -#define SPSR_CTL 5 - -static CONST struct asm_psr psrs[] = -{ - /* Valid <psr>'s */ - {"cpsr", CPSR_ALL}, - {"cpsr_all", CPSR_ALL}, - {"spsr", SPSR_ALL}, - {"spsr_all", SPSR_ALL}, - - /* Valid <psrf>'s */ - {"cpsr_flg", CPSR_FLG}, - {"spsr_flg", SPSR_FLG}, - - /* Valid <psrc>'s */ - {"cpsr_c", CPSR_CTL}, - {"cpsr_ctl", CPSR_CTL}, - {"spsr_c", SPSR_CTL}, - {"spsr_ctl", SPSR_CTL} -}; - -/* Functions called by parser */ -/* ARM instructions */ -static void do_arit PARAMS ((char *, unsigned long)); -static void do_cmp PARAMS ((char *, unsigned long)); -static void do_mov PARAMS ((char *, unsigned long)); -static void do_ldst PARAMS ((char *, unsigned long)); -static void do_ldmstm PARAMS ((char *, unsigned long)); -static void do_branch PARAMS ((char *, unsigned long)); -static void do_swi PARAMS ((char *, unsigned long)); -/* Pseudo Op codes */ -static void do_adr PARAMS ((char *, unsigned long)); -static void do_adrl PARAMS ((char *, unsigned long)); -static void do_nop PARAMS ((char *, unsigned long)); -/* ARM 2 */ -static void do_mul PARAMS ((char *, unsigned long)); -static void do_mla PARAMS ((char *, unsigned long)); -/* ARM 3 */ -static void do_swap PARAMS ((char *, unsigned long)); -/* ARM 6 */ -static void do_msr PARAMS ((char *, unsigned long)); -static void do_mrs PARAMS ((char *, unsigned long)); -/* ARM 7M */ -static void do_mull PARAMS ((char *, unsigned long)); -/* ARM THUMB */ -static void do_bx PARAMS ((char *, unsigned long)); - - -/* Coprocessor Instructions */ -static void do_cdp PARAMS ((char *, unsigned long)); -static void do_lstc PARAMS ((char *, unsigned long)); -static void do_co_reg PARAMS ((char *, unsigned long)); -static void do_fp_ctrl PARAMS ((char *, unsigned long)); -static void do_fp_ldst PARAMS ((char *, unsigned long)); -static void do_fp_ldmstm PARAMS ((char *, unsigned long)); -static void do_fp_dyadic PARAMS ((char *, unsigned long)); -static void do_fp_monadic PARAMS ((char *, unsigned long)); -static void do_fp_cmp PARAMS ((char *, unsigned long)); -static void do_fp_from_reg PARAMS ((char *, unsigned long)); -static void do_fp_to_reg PARAMS ((char *, unsigned long)); - -static void fix_new_arm PARAMS ((fragS *, int, short, expressionS *, int, int)); -static int arm_reg_parse PARAMS ((char **)); -static int arm_psr_parse PARAMS ((char **)); -static void symbol_locate PARAMS ((symbolS *, CONST char *, segT, valueT, fragS *)); -static int add_to_lit_pool PARAMS ((void)); -static unsigned validate_immediate PARAMS ((unsigned)); -static unsigned validate_immediate_twopart PARAMS ((unsigned int, unsigned int *)); -static int validate_offset_imm PARAMS ((unsigned int, int)); -static void opcode_select PARAMS ((int)); -static void end_of_line PARAMS ((char *)); -static int reg_required_here PARAMS ((char **, int)); -static int psr_required_here PARAMS ((char **, int, int)); -static int co_proc_number PARAMS ((char **)); -static int cp_opc_expr PARAMS ((char **, int, int)); -static int cp_reg_required_here PARAMS ((char **, int)); -static int fp_reg_required_here PARAMS ((char **, int)); -static int cp_address_offset PARAMS ((char **)); -static int cp_address_required_here PARAMS ((char **)); -static int my_get_float_expression PARAMS ((char **)); -static int skip_past_comma PARAMS ((char **)); -static int walk_no_bignums PARAMS ((symbolS *)); -static int negate_data_op PARAMS ((unsigned long *, unsigned long)); -static int data_op2 PARAMS ((char **)); -static int fp_op2 PARAMS ((char **)); -static long reg_list PARAMS ((char **)); -static void thumb_load_store PARAMS ((char *, int, int)); -static int decode_shift PARAMS ((char **, int)); -static int ldst_extend PARAMS ((char **, int)); -static void thumb_add_sub PARAMS ((char *, int)); -static void insert_reg PARAMS ((int)); -static void thumb_shift PARAMS ((char *, int)); -static void thumb_mov_compare PARAMS ((char *, int)); -static void set_constant_flonums PARAMS ((void)); -static valueT md_chars_to_number PARAMS ((char *, int)); -static void insert_reg_alias PARAMS ((char *, int)); -static void output_inst PARAMS ((void)); -#ifdef OBJ_ELF -static bfd_reloc_code_real_type arm_parse_reloc PARAMS ((void)); -#endif - -/* ARM instructions take 4bytes in the object file, Thumb instructions - take 2: */ -#define INSN_SIZE 4 - -/* LONGEST_INST is the longest basic instruction name without conditions or - * flags. - * ARM7M has 4 of length 5 - */ - -#define LONGEST_INST 5 - - -struct asm_opcode -{ - CONST char * template; /* Basic string to match */ - unsigned long value; /* Basic instruction code */ - - /* Compulsory suffix that must follow conds. If "", then the - instruction is not conditional and must have no suffix. */ - CONST char * comp_suffix; - - CONST struct asm_flg * flags; /* Bits to toggle if flag 'n' set */ - unsigned long variants; /* Which CPU variants this exists for */ - /* Function to call to parse args */ - void (* parms) PARAMS ((char *, unsigned long)); -}; - -static CONST struct asm_opcode insns[] = -{ -/* ARM Instructions */ - {"and", 0x00000000, NULL, s_flag, ARM_ANY, do_arit}, - {"eor", 0x00200000, NULL, s_flag, ARM_ANY, do_arit}, - {"sub", 0x00400000, NULL, s_flag, ARM_ANY, do_arit}, - {"rsb", 0x00600000, NULL, s_flag, ARM_ANY, do_arit}, - {"add", 0x00800000, NULL, s_flag, ARM_ANY, do_arit}, - {"adc", 0x00a00000, NULL, s_flag, ARM_ANY, do_arit}, - {"sbc", 0x00c00000, NULL, s_flag, ARM_ANY, do_arit}, - {"rsc", 0x00e00000, NULL, s_flag, ARM_ANY, do_arit}, - {"orr", 0x01800000, NULL, s_flag, ARM_ANY, do_arit}, - {"bic", 0x01c00000, NULL, s_flag, ARM_ANY, do_arit}, - {"tst", 0x01000000, NULL, cmp_flags, ARM_ANY, do_cmp}, - {"teq", 0x01200000, NULL, cmp_flags, ARM_ANY, do_cmp}, - {"cmp", 0x01400000, NULL, cmp_flags, ARM_ANY, do_cmp}, - {"cmn", 0x01600000, NULL, cmp_flags, ARM_ANY, do_cmp}, - {"mov", 0x01a00000, NULL, s_flag, ARM_ANY, do_mov}, - {"mvn", 0x01e00000, NULL, s_flag, ARM_ANY, do_mov}, - {"str", 0x04000000, NULL, str_flags, ARM_ANY, do_ldst}, - {"ldr", 0x04100000, NULL, ldr_flags, ARM_ANY, do_ldst}, - {"stm", 0x08000000, NULL, stm_flags, ARM_ANY, do_ldmstm}, - {"ldm", 0x08100000, NULL, ldm_flags, ARM_ANY, do_ldmstm}, - {"swi", 0x0f000000, NULL, NULL, ARM_ANY, do_swi}, - {"bl", 0x0bfffffe, NULL, NULL, ARM_ANY, do_branch}, - {"b", 0x0afffffe, NULL, NULL, ARM_ANY, do_branch}, - -/* Pseudo ops */ - {"adr", 0x028f0000, NULL, NULL, ARM_ANY, do_adr}, - {"adrl", 0x028f0000, NULL, NULL, ARM_ANY, do_adrl}, - {"nop", 0x01a00000, NULL, NULL, ARM_ANY, do_nop}, - -/* ARM 2 multiplies */ - {"mul", 0x00000090, NULL, s_flag, ARM_2UP, do_mul}, - {"mla", 0x00200090, NULL, s_flag, ARM_2UP, do_mla}, - -/* ARM 3 - swp instructions */ - {"swp", 0x01000090, NULL, byte_flag, ARM_3UP, do_swap}, - -/* ARM 6 Coprocessor instructions */ - {"mrs", 0x010f0000, NULL, NULL, ARM_6UP, do_mrs}, - {"msr", 0x0120f000, NULL, NULL, ARM_6UP, do_msr}, -/* ScottB: our code uses 0x0128f000 for msr. - NickC: but this is wrong because the bits 16 and 19 are handled - by the PSR_xxx defines above. */ - -/* ARM 7M long multiplies - need signed/unsigned flags! */ - {"smull", 0x00c00090, NULL, s_flag, ARM_LONGMUL, do_mull}, - {"umull", 0x00800090, NULL, s_flag, ARM_LONGMUL, do_mull}, - {"smlal", 0x00e00090, NULL, s_flag, ARM_LONGMUL, do_mull}, - {"umlal", 0x00a00090, NULL, s_flag, ARM_LONGMUL, do_mull}, - -/* ARM THUMB interworking */ - {"bx", 0x012fff10, NULL, NULL, ARM_THUMB, do_bx}, - -/* Floating point instructions */ - {"wfs", 0x0e200110, NULL, NULL, FPU_ALL, do_fp_ctrl}, - {"rfs", 0x0e300110, NULL, NULL, FPU_ALL, do_fp_ctrl}, - {"wfc", 0x0e400110, NULL, NULL, FPU_ALL, do_fp_ctrl}, - {"rfc", 0x0e500110, NULL, NULL, FPU_ALL, do_fp_ctrl}, - {"ldf", 0x0c100100, "sdep", NULL, FPU_ALL, do_fp_ldst}, - {"stf", 0x0c000100, "sdep", NULL, FPU_ALL, do_fp_ldst}, - {"lfm", 0x0c100200, NULL, lfm_flags, FPU_MEMMULTI, do_fp_ldmstm}, - {"sfm", 0x0c000200, NULL, sfm_flags, FPU_MEMMULTI, do_fp_ldmstm}, - {"mvf", 0x0e008100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"mnf", 0x0e108100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"abs", 0x0e208100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"rnd", 0x0e308100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"sqt", 0x0e408100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"log", 0x0e508100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"lgn", 0x0e608100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"exp", 0x0e708100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"sin", 0x0e808100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"cos", 0x0e908100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"tan", 0x0ea08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"asn", 0x0eb08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"acs", 0x0ec08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"atn", 0x0ed08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"urd", 0x0ee08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"nrm", 0x0ef08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, - {"adf", 0x0e000100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"suf", 0x0e200100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"rsf", 0x0e300100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"muf", 0x0e100100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"dvf", 0x0e400100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"rdf", 0x0e500100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"pow", 0x0e600100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"rpw", 0x0e700100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"rmf", 0x0e800100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"fml", 0x0e900100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"fdv", 0x0ea00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"frd", 0x0eb00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"pol", 0x0ec00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, - {"cmf", 0x0e90f110, NULL, except_flag, FPU_ALL, do_fp_cmp}, - {"cnf", 0x0eb0f110, NULL, except_flag, FPU_ALL, do_fp_cmp}, -/* The FPA10 data sheet suggests that the 'E' of cmfe/cnfe should not - be an optional suffix, but part of the instruction. To be compatible, - we accept either. */ - {"cmfe", 0x0ed0f110, NULL, NULL, FPU_ALL, do_fp_cmp}, - {"cnfe", 0x0ef0f110, NULL, NULL, FPU_ALL, do_fp_cmp}, - {"flt", 0x0e000110, "sde", round_flags, FPU_ALL, do_fp_from_reg}, - {"fix", 0x0e100110, NULL, fix_flags, FPU_ALL, do_fp_to_reg}, - -/* Generic copressor instructions */ - {"cdp", 0x0e000000, NULL, NULL, ARM_2UP, do_cdp}, - {"ldc", 0x0c100000, NULL, cplong_flag, ARM_2UP, do_lstc}, - {"stc", 0x0c000000, NULL, cplong_flag, ARM_2UP, do_lstc}, - {"mcr", 0x0e000010, NULL, NULL, ARM_2UP, do_co_reg}, - {"mrc", 0x0e100010, NULL, NULL, ARM_2UP, do_co_reg}, -}; - -/* defines for various bits that we will want to toggle */ - -#define INST_IMMEDIATE 0x02000000 -#define OFFSET_REG 0x02000000 -#define HWOFFSET_IMM 0x00400000 -#define SHIFT_BY_REG 0x00000010 -#define PRE_INDEX 0x01000000 -#define INDEX_UP 0x00800000 -#define WRITE_BACK 0x00200000 -#define LDM_TYPE_2_OR_3 0x00400000 - -#define LITERAL_MASK 0xf000f000 -#define COND_MASK 0xf0000000 -#define OPCODE_MASK 0xfe1fffff -#define DATA_OP_SHIFT 21 - -/* Codes to distinguish the arithmetic instructions */ - -#define OPCODE_AND 0 -#define OPCODE_EOR 1 -#define OPCODE_SUB 2 -#define OPCODE_RSB 3 -#define OPCODE_ADD 4 -#define OPCODE_ADC 5 -#define OPCODE_SBC 6 -#define OPCODE_RSC 7 -#define OPCODE_TST 8 -#define OPCODE_TEQ 9 -#define OPCODE_CMP 10 -#define OPCODE_CMN 11 -#define OPCODE_ORR 12 -#define OPCODE_MOV 13 -#define OPCODE_BIC 14 -#define OPCODE_MVN 15 - -static void do_t_nop PARAMS ((char *)); -static void do_t_arit PARAMS ((char *)); -static void do_t_add PARAMS ((char *)); -static void do_t_asr PARAMS ((char *)); -static void do_t_branch9 PARAMS ((char *)); -static void do_t_branch12 PARAMS ((char *)); -static void do_t_branch23 PARAMS ((char *)); -static void do_t_bx PARAMS ((char *)); -static void do_t_compare PARAMS ((char *)); -static void do_t_ldmstm PARAMS ((char *)); -static void do_t_ldr PARAMS ((char *)); -static void do_t_ldrb PARAMS ((char *)); -static void do_t_ldrh PARAMS ((char *)); -static void do_t_lds PARAMS ((char *)); -static void do_t_lsl PARAMS ((char *)); -static void do_t_lsr PARAMS ((char *)); -static void do_t_mov PARAMS ((char *)); -static void do_t_push_pop PARAMS ((char *)); -static void do_t_str PARAMS ((char *)); -static void do_t_strb PARAMS ((char *)); -static void do_t_strh PARAMS ((char *)); -static void do_t_sub PARAMS ((char *)); -static void do_t_swi PARAMS ((char *)); -static void do_t_adr PARAMS ((char *)); - -#define T_OPCODE_MUL 0x4340 -#define T_OPCODE_TST 0x4200 -#define T_OPCODE_CMN 0x42c0 -#define T_OPCODE_NEG 0x4240 -#define T_OPCODE_MVN 0x43c0 - -#define T_OPCODE_ADD_R3 0x1800 -#define T_OPCODE_SUB_R3 0x1a00 -#define T_OPCODE_ADD_HI 0x4400 -#define T_OPCODE_ADD_ST 0xb000 -#define T_OPCODE_SUB_ST 0xb080 -#define T_OPCODE_ADD_SP 0xa800 -#define T_OPCODE_ADD_PC 0xa000 -#define T_OPCODE_ADD_I8 0x3000 -#define T_OPCODE_SUB_I8 0x3800 -#define T_OPCODE_ADD_I3 0x1c00 -#define T_OPCODE_SUB_I3 0x1e00 - -#define T_OPCODE_ASR_R 0x4100 -#define T_OPCODE_LSL_R 0x4080 -#define T_OPCODE_LSR_R 0x40c0 -#define T_OPCODE_ASR_I 0x1000 -#define T_OPCODE_LSL_I 0x0000 -#define T_OPCODE_LSR_I 0x0800 - -#define T_OPCODE_MOV_I8 0x2000 -#define T_OPCODE_CMP_I8 0x2800 -#define T_OPCODE_CMP_LR 0x4280 -#define T_OPCODE_MOV_HR 0x4600 -#define T_OPCODE_CMP_HR 0x4500 - -#define T_OPCODE_LDR_PC 0x4800 -#define T_OPCODE_LDR_SP 0x9800 -#define T_OPCODE_STR_SP 0x9000 -#define T_OPCODE_LDR_IW 0x6800 -#define T_OPCODE_STR_IW 0x6000 -#define T_OPCODE_LDR_IH 0x8800 -#define T_OPCODE_STR_IH 0x8000 -#define T_OPCODE_LDR_IB 0x7800 -#define T_OPCODE_STR_IB 0x7000 -#define T_OPCODE_LDR_RW 0x5800 -#define T_OPCODE_STR_RW 0x5000 -#define T_OPCODE_LDR_RH 0x5a00 -#define T_OPCODE_STR_RH 0x5200 -#define T_OPCODE_LDR_RB 0x5c00 -#define T_OPCODE_STR_RB 0x5400 - -#define T_OPCODE_PUSH 0xb400 -#define T_OPCODE_POP 0xbc00 - -#define T_OPCODE_BRANCH 0xe7fe - -static int thumb_reg PARAMS ((char ** str, int hi_lo)); - -#define THUMB_SIZE 2 /* Size of thumb instruction */ -#define THUMB_REG_LO 0x1 -#define THUMB_REG_HI 0x2 -#define THUMB_REG_ANY 0x3 - -#define THUMB_H1 0x0080 -#define THUMB_H2 0x0040 - -#define THUMB_ASR 0 -#define THUMB_LSL 1 -#define THUMB_LSR 2 - -#define THUMB_MOVE 0 -#define THUMB_COMPARE 1 - -#define THUMB_LOAD 0 -#define THUMB_STORE 1 - -#define THUMB_PP_PC_LR 0x0100 - -/* These three are used for immediate shifts, do not alter */ -#define THUMB_WORD 2 -#define THUMB_HALFWORD 1 -#define THUMB_BYTE 0 - -struct thumb_opcode -{ - CONST char * template; /* Basic string to match */ - unsigned long value; /* Basic instruction code */ - int size; - unsigned long variants; /* Which CPU variants this exists for */ - void (* parms) PARAMS ((char *)); /* Function to call to parse args */ -}; - -static CONST struct thumb_opcode tinsns[] = -{ - {"adc", 0x4140, 2, ARM_THUMB, do_t_arit}, - {"add", 0x0000, 2, ARM_THUMB, do_t_add}, - {"and", 0x4000, 2, ARM_THUMB, do_t_arit}, - {"asr", 0x0000, 2, ARM_THUMB, do_t_asr}, - {"b", T_OPCODE_BRANCH, 2, ARM_THUMB, do_t_branch12}, - {"beq", 0xd0fe, 2, ARM_THUMB, do_t_branch9}, - {"bne", 0xd1fe, 2, ARM_THUMB, do_t_branch9}, - {"bcs", 0xd2fe, 2, ARM_THUMB, do_t_branch9}, - {"bhs", 0xd2fe, 2, ARM_THUMB, do_t_branch9}, - {"bcc", 0xd3fe, 2, ARM_THUMB, do_t_branch9}, - {"bul", 0xd3fe, 2, ARM_THUMB, do_t_branch9}, - {"blo", 0xd3fe, 2, ARM_THUMB, do_t_branch9}, - {"bmi", 0xd4fe, 2, ARM_THUMB, do_t_branch9}, - {"bpl", 0xd5fe, 2, ARM_THUMB, do_t_branch9}, - {"bvs", 0xd6fe, 2, ARM_THUMB, do_t_branch9}, - {"bvc", 0xd7fe, 2, ARM_THUMB, do_t_branch9}, - {"bhi", 0xd8fe, 2, ARM_THUMB, do_t_branch9}, - {"bls", 0xd9fe, 2, ARM_THUMB, do_t_branch9}, - {"bge", 0xdafe, 2, ARM_THUMB, do_t_branch9}, - {"blt", 0xdbfe, 2, ARM_THUMB, do_t_branch9}, - {"bgt", 0xdcfe, 2, ARM_THUMB, do_t_branch9}, - {"ble", 0xddfe, 2, ARM_THUMB, do_t_branch9}, - {"bic", 0x4380, 2, ARM_THUMB, do_t_arit}, - {"bl", 0xf7fffffe, 4, ARM_THUMB, do_t_branch23}, - {"bx", 0x4700, 2, ARM_THUMB, do_t_bx}, - {"cmn", T_OPCODE_CMN, 2, ARM_THUMB, do_t_arit}, - {"cmp", 0x0000, 2, ARM_THUMB, do_t_compare}, - {"eor", 0x4040, 2, ARM_THUMB, do_t_arit}, - {"ldmia", 0xc800, 2, ARM_THUMB, do_t_ldmstm}, - {"ldr", 0x0000, 2, ARM_THUMB, do_t_ldr}, - {"ldrb", 0x0000, 2, ARM_THUMB, do_t_ldrb}, - {"ldrh", 0x0000, 2, ARM_THUMB, do_t_ldrh}, - {"ldrsb", 0x5600, 2, ARM_THUMB, do_t_lds}, - {"ldrsh", 0x5e00, 2, ARM_THUMB, do_t_lds}, - {"ldsb", 0x5600, 2, ARM_THUMB, do_t_lds}, - {"ldsh", 0x5e00, 2, ARM_THUMB, do_t_lds}, - {"lsl", 0x0000, 2, ARM_THUMB, do_t_lsl}, - {"lsr", 0x0000, 2, ARM_THUMB, do_t_lsr}, - {"mov", 0x0000, 2, ARM_THUMB, do_t_mov}, - {"mul", T_OPCODE_MUL, 2, ARM_THUMB, do_t_arit}, - {"mvn", T_OPCODE_MVN, 2, ARM_THUMB, do_t_arit}, - {"neg", T_OPCODE_NEG, 2, ARM_THUMB, do_t_arit}, - {"orr", 0x4300, 2, ARM_THUMB, do_t_arit}, - {"pop", 0xbc00, 2, ARM_THUMB, do_t_push_pop}, - {"push", 0xb400, 2, ARM_THUMB, do_t_push_pop}, - {"ror", 0x41c0, 2, ARM_THUMB, do_t_arit}, - {"sbc", 0x4180, 2, ARM_THUMB, do_t_arit}, - {"stmia", 0xc000, 2, ARM_THUMB, do_t_ldmstm}, - {"str", 0x0000, 2, ARM_THUMB, do_t_str}, - {"strb", 0x0000, 2, ARM_THUMB, do_t_strb}, - {"strh", 0x0000, 2, ARM_THUMB, do_t_strh}, - {"swi", 0xdf00, 2, ARM_THUMB, do_t_swi}, - {"sub", 0x0000, 2, ARM_THUMB, do_t_sub}, - {"tst", T_OPCODE_TST, 2, ARM_THUMB, do_t_arit}, - /* Pseudo ops: */ - {"adr", 0x0000, 2, ARM_THUMB, do_t_adr}, - {"nop", 0x46C0, 2, ARM_THUMB, do_t_nop}, /* mov r8,r8 */ -}; - -struct reg_entry -{ - CONST char * name; - int number; -}; - -#define int_register(reg) ((reg) >= 0 && (reg) <= 15) -#define cp_register(reg) ((reg) >= 32 && (reg) <= 47) -#define fp_register(reg) ((reg) >= 16 && (reg) <= 23) - -#define REG_PC 15 -#define REG_LR 14 -#define REG_SP 13 - -/* These are the standard names; Users can add aliases with .req */ -static CONST struct reg_entry reg_table[] = -{ - /* Processor Register Numbers */ - {"r0", 0}, {"r1", 1}, {"r2", 2}, {"r3", 3}, - {"r4", 4}, {"r5", 5}, {"r6", 6}, {"r7", 7}, - {"r8", 8}, {"r9", 9}, {"r10", 10}, {"r11", 11}, - {"r12", 12}, {"r13", REG_SP},{"r14", REG_LR},{"r15", REG_PC}, - /* APCS conventions */ - {"a1", 0}, {"a2", 1}, {"a3", 2}, {"a4", 3}, - {"v1", 4}, {"v2", 5}, {"v3", 6}, {"v4", 7}, {"v5", 8}, - {"v6", 9}, {"sb", 9}, {"v7", 10}, {"sl", 10}, - {"fp", 11}, {"ip", 12}, {"sp", REG_SP},{"lr", REG_LR},{"pc", REG_PC}, - /* FP Registers */ - {"f0", 16}, {"f1", 17}, {"f2", 18}, {"f3", 19}, - {"f4", 20}, {"f5", 21}, {"f6", 22}, {"f7", 23}, - {"c0", 32}, {"c1", 33}, {"c2", 34}, {"c3", 35}, - {"c4", 36}, {"c5", 37}, {"c6", 38}, {"c7", 39}, - {"c8", 40}, {"c9", 41}, {"c10", 42}, {"c11", 43}, - {"c12", 44}, {"c13", 45}, {"c14", 46}, {"c15", 47}, - {"cr0", 32}, {"cr1", 33}, {"cr2", 34}, {"cr3", 35}, - {"cr4", 36}, {"cr5", 37}, {"cr6", 38}, {"cr7", 39}, - {"cr8", 40}, {"cr9", 41}, {"cr10", 42}, {"cr11", 43}, - {"cr12", 44}, {"cr13", 45}, {"cr14", 46}, {"cr15", 47}, - {NULL, 0} -}; - -#define BAD_ARGS _("Bad arguments to instruction") -#define BAD_PC _("r15 not allowed here") -#define BAD_FLAGS _("Instruction should not have flags") -#define BAD_COND _("Instruction is not conditional") - -static struct hash_control * arm_ops_hsh = NULL; -static struct hash_control * arm_tops_hsh = NULL; -static struct hash_control * arm_cond_hsh = NULL; -static struct hash_control * arm_shift_hsh = NULL; -static struct hash_control * arm_reg_hsh = NULL; -static struct hash_control * arm_psr_hsh = NULL; - -/* This table describes all the machine specific pseudo-ops the assembler - has to support. The fields are: - pseudo-op name without dot - function to call to execute this pseudo-op - Integer arg to pass to the function - */ - -static void s_req PARAMS ((int)); -static void s_align PARAMS ((int)); -static void s_bss PARAMS ((int)); -static void s_even PARAMS ((int)); -static void s_ltorg PARAMS ((int)); -static void s_arm PARAMS ((int)); -static void s_thumb PARAMS ((int)); -static void s_code PARAMS ((int)); -static void s_force_thumb PARAMS ((int)); -static void s_thumb_func PARAMS ((int)); -static void s_thumb_set PARAMS ((int)); -static void arm_s_text PARAMS ((int)); -static void arm_s_data PARAMS ((int)); -#ifdef OBJ_ELF -static void arm_s_section PARAMS ((int)); -static void s_arm_elf_cons PARAMS ((int)); -#endif - -static int my_get_expression PARAMS ((expressionS *, char **)); - -CONST pseudo_typeS md_pseudo_table[] = -{ - { "req", s_req, 0 }, /* Never called becasue '.req' does not start line */ - { "bss", s_bss, 0 }, - { "align", s_align, 0 }, - { "arm", s_arm, 0 }, - { "thumb", s_thumb, 0 }, - { "code", s_code, 0 }, - { "force_thumb", s_force_thumb, 0 }, - { "thumb_func", s_thumb_func, 0 }, - { "thumb_set", s_thumb_set, 0 }, - { "even", s_even, 0 }, - { "ltorg", s_ltorg, 0 }, - { "pool", s_ltorg, 0 }, - /* Allow for the effect of section changes. */ - { "text", arm_s_text, 0 }, - { "data", arm_s_data, 0 }, -#ifdef OBJ_ELF - { "section", arm_s_section, 0 }, - { "section.s", arm_s_section, 0 }, - { "sect", arm_s_section, 0 }, - { "sect.s", arm_s_section, 0 }, - { "word", s_arm_elf_cons, 4 }, - { "long", s_arm_elf_cons, 4 }, -#else - { "word", cons, 4}, -#endif - { "extend", float_cons, 'x' }, - { "ldouble", float_cons, 'x' }, - { "packed", float_cons, 'p' }, - { 0, 0, 0 } -}; - -/* Stuff needed to resolve the label ambiguity - As: - ... - label: <insn> - may differ from: - ... - label: - <insn> -*/ - -symbolS * last_label_seen; -static int label_is_thumb_function_name = false; - -/* Literal stuff */ - -#define MAX_LITERAL_POOL_SIZE 1024 - -typedef struct literalS -{ - struct expressionS exp; - struct arm_it * inst; -} literalT; - -literalT literals[MAX_LITERAL_POOL_SIZE]; -int next_literal_pool_place = 0; /* Next free entry in the pool */ -int lit_pool_num = 1; /* Next literal pool number */ -symbolS * current_poolP = NULL; - -static int -add_to_lit_pool () -{ - int lit_count = 0; - - if (current_poolP == NULL) - current_poolP = symbol_create (FAKE_LABEL_NAME, undefined_section, - (valueT) 0, &zero_address_frag); - - /* Check if this literal value is already in the pool: */ - while (lit_count < next_literal_pool_place) - { - if (literals[lit_count].exp.X_op == inst.reloc.exp.X_op - && inst.reloc.exp.X_op == O_constant - && literals[lit_count].exp.X_add_number == inst.reloc.exp.X_add_number - && literals[lit_count].exp.X_unsigned == inst.reloc.exp.X_unsigned) - break; - lit_count++; - } - - if (lit_count == next_literal_pool_place) /* new entry */ - { - if (next_literal_pool_place > MAX_LITERAL_POOL_SIZE) - { - inst.error = _("Literal Pool Overflow"); - return FAIL; - } - - literals[next_literal_pool_place].exp = inst.reloc.exp; - lit_count = next_literal_pool_place++; - } - - inst.reloc.exp.X_op = O_symbol; - inst.reloc.exp.X_add_number = (lit_count) * 4 - 8; - inst.reloc.exp.X_add_symbol = current_poolP; - - return SUCCESS; -} - -/* Can't use symbol_new here, so have to create a symbol and then at - a later date assign it a value. Thats what these functions do. */ -static void -symbol_locate (symbolP, name, segment, valu, frag) - symbolS * symbolP; - CONST char * name; /* It is copied, the caller can modify */ - segT segment; /* Segment identifier (SEG_<something>) */ - valueT valu; /* Symbol value */ - fragS * frag; /* Associated fragment */ -{ - unsigned int name_length; - char * preserved_copy_of_name; - - name_length = strlen (name) + 1; /* +1 for \0 */ - obstack_grow (¬es, name, name_length); - preserved_copy_of_name = obstack_finish (¬es); -#ifdef STRIP_UNDERSCORE - if (preserved_copy_of_name[0] == '_') - preserved_copy_of_name++; -#endif - -#ifdef tc_canonicalize_symbol_name - preserved_copy_of_name = - tc_canonicalize_symbol_name (preserved_copy_of_name); -#endif - - S_SET_NAME (symbolP, preserved_copy_of_name); - - S_SET_SEGMENT (symbolP, segment); - S_SET_VALUE (symbolP, valu); - symbol_clear_list_pointers(symbolP); - - symbol_set_frag (symbolP, frag); - - /* Link to end of symbol chain. */ - { - extern int symbol_table_frozen; - if (symbol_table_frozen) - abort (); - } - - symbol_append (symbolP, symbol_lastP, & symbol_rootP, & symbol_lastP); - - obj_symbol_new_hook (symbolP); - -#ifdef tc_symbol_new_hook - tc_symbol_new_hook (symbolP); -#endif - -#ifdef DEBUG_SYMS - verify_symbol_chain (symbol_rootP, symbol_lastP); -#endif /* DEBUG_SYMS */ -} - -/* Check that an immediate is valid, and if so, convert it to the right format. */ - -static unsigned int -validate_immediate (val) - unsigned int val; -{ - unsigned int a; - unsigned int i; - -#define rotate_left(v, n) (v << n | v >> (32 - n)) - - for (i = 0; i < 32; i += 2) - if ((a = rotate_left (val, i)) <= 0xff) - return a | (i << 7); /* 12-bit pack: [shift-cnt,const] */ - - return FAIL; -} - -/* Check to see if an immediate can be computed as two seperate immediate - values, added together. We already know that this value cannot be - computed by just one ARM instruction. */ - -static unsigned int -validate_immediate_twopart (val, highpart) - unsigned int val; - unsigned int * highpart; -{ - unsigned int a; - unsigned int i; - - for (i = 0; i < 32; i += 2) - if (((a = rotate_left (val, i)) & 0xff) != 0) - { - if (a & 0xff00) - { - if (a & ~ 0xffff) - continue; - * highpart = (a >> 8) | ((i + 24) << 7); - } - else if (a & 0xff0000) - { - if (a & 0xff000000) - continue; - - * highpart = (a >> 16) | ((i + 16) << 7); - } - else - { - assert (a & 0xff000000); - - * highpart = (a >> 24) | ((i + 8) << 7); - } - - return (a & 0xff) | (i << 7); - } - - return FAIL; -} - -static int -validate_offset_imm (val, hwse) - unsigned int val; - int hwse; -{ - if ((hwse && val > 255) || val > 4095) - return FAIL; - return val; -} - - -static void -s_req (a) - int a; -{ - as_bad (_("Invalid syntax for .req directive.")); -} - -static void -s_bss (ignore) - int ignore; -{ - /* We don't support putting frags in the BSS segment, we fake it by - marking in_bss, then looking at s_skip for clues?.. */ - subseg_set (bss_section, 0); - demand_empty_rest_of_line (); -} - -static void -s_even (ignore) - int ignore; -{ - if (!need_pass_2) /* Never make frag if expect extra pass. */ - frag_align (1, 0, 0); - - record_alignment (now_seg, 1); - - demand_empty_rest_of_line (); -} - -static void -s_ltorg (ignored) - int ignored; -{ - int lit_count = 0; - char sym_name[20]; - - if (current_poolP == NULL) - return; - - /* Align pool as you have word accesses */ - /* Only make a frag if we have to ... */ - if (!need_pass_2) - frag_align (2, 0, 0); - - record_alignment (now_seg, 2); - - sprintf (sym_name, "$$lit_\002%x", lit_pool_num++); - - symbol_locate (current_poolP, sym_name, now_seg, - (valueT) frag_now_fix (), frag_now); - symbol_table_insert (current_poolP); - - ARM_SET_THUMB (current_poolP, thumb_mode); - -#if defined OBJ_COFF || defined OBJ_ELF - ARM_SET_INTERWORK (current_poolP, support_interwork); -#endif - - while (lit_count < next_literal_pool_place) - /* First output the expression in the instruction to the pool */ - emit_expr (&(literals[lit_count++].exp), 4); /* .word */ - - next_literal_pool_place = 0; - current_poolP = NULL; -} - -static void -s_align (unused) /* Same as s_align_ptwo but align 0 => align 2 */ - int unused; -{ - register int temp; - register long temp_fill; - long max_alignment = 15; - - temp = get_absolute_expression (); - if (temp > max_alignment) - as_bad (_("Alignment too large: %d. assumed."), temp = max_alignment); - else if (temp < 0) - { - as_bad (_("Alignment negative. 0 assumed.")); - temp = 0; - } - - if (*input_line_pointer == ',') - { - input_line_pointer++; - temp_fill = get_absolute_expression (); - } - else - temp_fill = 0; - - if (!temp) - temp = 2; - - /* Only make a frag if we HAVE to. . . */ - if (temp && !need_pass_2) - frag_align (temp, (int) temp_fill, 0); - demand_empty_rest_of_line (); - - record_alignment (now_seg, temp); -} - -static void -s_force_thumb (ignore) - int ignore; -{ - /* If we are not already in thumb mode go into it, EVEN if - the target processor does not support thumb instructions. - This is used by gcc/config/arm/lib1funcs.asm for example - to compile interworking support functions even if the - target processor should not support interworking. */ - - if (! thumb_mode) - { - thumb_mode = 2; - - record_alignment (now_seg, 1); - } - - demand_empty_rest_of_line (); -} - -static void -s_thumb_func (ignore) - int ignore; -{ - /* The following label is the name/address of the start of a Thumb function. - We need to know this for the interworking support. */ - - label_is_thumb_function_name = true; - - demand_empty_rest_of_line (); -} - -/* Perform a .set directive, but also mark the alias as - being a thumb function. */ - -static void -s_thumb_set (equiv) - int equiv; -{ - /* XXX the following is a duplicate of the code for s_set() in read.c - We cannot just call that code as we need to get at the symbol that - is created. */ - register char * name; - register char delim; - register char * end_name; - register symbolS * symbolP; - - /* - * Especial apologies for the random logic: - * this just grew, and could be parsed much more simply! - * Dean in haste. - */ - name = input_line_pointer; - delim = get_symbol_end (); - end_name = input_line_pointer; - *end_name = delim; - - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - *end_name = 0; - as_bad (_("Expected comma after name \"%s\""), name); - *end_name = delim; - ignore_rest_of_line (); - return; - } - - input_line_pointer++; - *end_name = 0; - - if (name[0] == '.' && name[1] == '\0') - { - /* XXX - this should not happen to .thumb_set */ - abort (); - } - - if ((symbolP = symbol_find (name)) == NULL - && (symbolP = md_undefined_symbol (name)) == NULL) - { -#ifndef NO_LISTING - /* When doing symbol listings, play games with dummy fragments living - outside the normal fragment chain to record the file and line info - for this symbol. */ - if (listing & LISTING_SYMBOLS) - { - extern struct list_info_struct * listing_tail; - fragS * dummy_frag = (fragS *) xmalloc (sizeof(fragS)); - memset (dummy_frag, 0, sizeof(fragS)); - dummy_frag->fr_type = rs_fill; - dummy_frag->line = listing_tail; - symbolP = symbol_new (name, undefined_section, 0, dummy_frag); - dummy_frag->fr_symbol = symbolP; - } - else -#endif - symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); - -#ifdef OBJ_COFF - /* "set" symbols are local unless otherwise specified. */ - SF_SET_LOCAL (symbolP); -#endif /* OBJ_COFF */ - } /* make a new symbol */ - - symbol_table_insert (symbolP); - - * end_name = delim; - - if (equiv - && S_IS_DEFINED (symbolP) - && S_GET_SEGMENT (symbolP) != reg_section) - as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); - - pseudo_set (symbolP); - - demand_empty_rest_of_line (); - - /* XXX Now we come to the Thumb specific bit of code. */ - - THUMB_SET_FUNC (symbolP, 1); - ARM_SET_THUMB (symbolP, 1); -#if defined OBJ_ELF || defined OBJ_COFF - ARM_SET_INTERWORK (symbolP, support_interwork); -#endif -} - -/* If we change section we must dump the literal pool first. */ -static void -arm_s_text (ignore) - int ignore; -{ - if (now_seg != text_section) - s_ltorg (0); - -#ifdef OBJ_ELF - obj_elf_text (ignore); -#else - s_text (ignore); -#endif -} - -static void -arm_s_data (ignore) - int ignore; -{ - if (flag_readonly_data_in_text) - { - if (now_seg != text_section) - s_ltorg (0); - } - else if (now_seg != data_section) - s_ltorg (0); - -#ifdef OBJ_ELF - obj_elf_data (ignore); -#else - s_data (ignore); -#endif -} - -#ifdef OBJ_ELF -static void -arm_s_section (ignore) - int ignore; -{ - s_ltorg (0); - - obj_elf_section (ignore); -} -#endif - -static void -opcode_select (width) - int width; -{ - switch (width) - { - case 16: - if (! thumb_mode) - { - if (! (cpu_variant & ARM_THUMB)) - as_bad (_("selected processor does not support THUMB opcodes")); - thumb_mode = 1; - /* No need to force the alignment, since we will have been - coming from ARM mode, which is word-aligned. */ - record_alignment (now_seg, 1); - } - break; - - case 32: - if (thumb_mode) - { - if ((cpu_variant & ARM_ANY) == ARM_THUMB) - as_bad (_("selected processor does not support ARM opcodes")); - thumb_mode = 0; - if (!need_pass_2) - frag_align (2, 0, 0); - record_alignment (now_seg, 1); - } - break; - - default: - as_bad (_("invalid instruction size selected (%d)"), width); - } -} - -static void -s_arm (ignore) - int ignore; -{ - opcode_select (32); - demand_empty_rest_of_line (); -} - -static void -s_thumb (ignore) - int ignore; -{ - opcode_select (16); - demand_empty_rest_of_line (); -} - -static void -s_code (unused) - int unused; -{ - register int temp; - - temp = get_absolute_expression (); - switch (temp) - { - case 16: - case 32: - opcode_select (temp); - break; - - default: - as_bad (_("invalid operand to .code directive (%d) (expecting 16 or 32)"), temp); - } -} - -static void -end_of_line (str) - char * str; -{ - skip_whitespace (str); - - if (* str != '\0') - inst.error = _("Garbage following instruction"); -} - -static int -skip_past_comma (str) - char ** str; -{ - char *p = *str, c; - int comma = 0; - - while ((c = *p) == ' ' || c == ',') - { - p++; - if (c == ',' && comma++) - return FAIL; - } - - if (c == '\0') - return FAIL; - - *str = p; - return comma ? SUCCESS : FAIL; -} - -/* A standard register must be given at this point. - Shift is the place to put it in inst.instruction. - Restores input start point on err. - Returns the reg#, or FAIL. */ - -static int -reg_required_here (str, shift) - char ** str; - int shift; -{ - static char buff [128]; /* XXX */ - int reg; - char * start = *str; - - if ((reg = arm_reg_parse (str)) != FAIL && int_register (reg)) - { - if (shift >= 0) - inst.instruction |= reg << shift; - return reg; - } - - /* Restore the start point, we may have got a reg of the wrong class. */ - *str = start; - - /* In the few cases where we might be able to accept something else - this error can be overridden. */ - sprintf (buff, _("Register expected, not '%.100s'"), start); - inst.error = buff; - - return FAIL; -} - -static int -psr_required_here (str, cpsr, spsr) - char ** str; - int cpsr; - int spsr; -{ - int psr; - char * start = *str; - psr = arm_psr_parse (str); - - if (psr == cpsr || psr == spsr) - { - if (psr == spsr) - inst.instruction |= 1 << 22; - - return SUCCESS; - } - - /* In the few cases where we might be able to accept something else - this error can be overridden. */ - inst.error = _("<psr(f)> expected"); - - /* Restore the start point. */ - *str = start; - return FAIL; -} - -static int -co_proc_number (str) - char ** str; -{ - int processor, pchar; - - skip_whitespace (* str); - - /* The data sheet seems to imply that just a number on its own is valid - here, but the RISC iX assembler seems to accept a prefix 'p'. We will - accept either. */ - if (**str == 'p' || **str == 'P') - (*str)++; - - pchar = *(*str)++; - if (pchar >= '0' && pchar <= '9') - { - processor = pchar - '0'; - if (**str >= '0' && **str <= '9') - { - processor = processor * 10 + *(*str)++ - '0'; - if (processor > 15) - { - inst.error = _("Illegal co-processor number"); - return FAIL; - } - } - } - else - { - inst.error = _("Bad or missing co-processor number"); - return FAIL; - } - - inst.instruction |= processor << 8; - return SUCCESS; -} - -static int -cp_opc_expr (str, where, length) - char ** str; - int where; - int length; -{ - expressionS expr; - - skip_whitespace (* str); - - memset (&expr, '\0', sizeof (expr)); - - if (my_get_expression (&expr, str)) - return FAIL; - if (expr.X_op != O_constant) - { - inst.error = _("bad or missing expression"); - return FAIL; - } - - if ((expr.X_add_number & ((1 << length) - 1)) != expr.X_add_number) - { - inst.error = _("immediate co-processor expression too large"); - return FAIL; - } - - inst.instruction |= expr.X_add_number << where; - return SUCCESS; -} - -static int -cp_reg_required_here (str, where) - char ** str; - int where; -{ - int reg; - char * start = *str; - - if ((reg = arm_reg_parse (str)) != FAIL && cp_register (reg)) - { - reg &= 15; - inst.instruction |= reg << where; - return reg; - } - - /* In the few cases where we might be able to accept something else - this error can be overridden. */ - inst.error = _("Co-processor register expected"); - - /* Restore the start point. */ - *str = start; - return FAIL; -} - -static int -fp_reg_required_here (str, where) - char ** str; - int where; -{ - int reg; - char * start = *str; - - if ((reg = arm_reg_parse (str)) != FAIL && fp_register (reg)) - { - reg &= 7; - inst.instruction |= reg << where; - return reg; - } - - /* In the few cases where we might be able to accept something else - this error can be overridden. */ - inst.error = _("Floating point register expected"); - - /* Restore the start point. */ - *str = start; - return FAIL; -} - -static int -cp_address_offset (str) - char ** str; -{ - int offset; - - skip_whitespace (* str); - - if (! is_immediate_prefix (**str)) - { - inst.error = _("immediate expression expected"); - return FAIL; - } - - (*str)++; - - if (my_get_expression (& inst.reloc.exp, str)) - return FAIL; - - if (inst.reloc.exp.X_op == O_constant) - { - offset = inst.reloc.exp.X_add_number; - - if (offset & 3) - { - inst.error = _("co-processor address must be word aligned"); - return FAIL; - } - - if (offset > 1023 || offset < -1023) - { - inst.error = _("offset too large"); - return FAIL; - } - - if (offset >= 0) - inst.instruction |= INDEX_UP; - else - offset = -offset; - - inst.instruction |= offset >> 2; - } - else - inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM; - - return SUCCESS; -} - -static int -cp_address_required_here (str) - char ** str; -{ - char * p = * str; - int pre_inc = 0; - int write_back = 0; - - if (*p == '[') - { - int reg; - - p++; - skip_whitespace (p); - - if ((reg = reg_required_here (& p, 16)) == FAIL) - return FAIL; - - skip_whitespace (p); - - if (*p == ']') - { - p++; - - if (skip_past_comma (& p) == SUCCESS) - { - /* [Rn], #expr */ - write_back = WRITE_BACK; - - if (reg == REG_PC) - { - inst.error = _("pc may not be used in post-increment"); - return FAIL; - } - - if (cp_address_offset (& p) == FAIL) - return FAIL; - } - else - pre_inc = PRE_INDEX | INDEX_UP; - } - else - { - /* '['Rn, #expr']'[!] */ - - if (skip_past_comma (& p) == FAIL) - { - inst.error = _("pre-indexed expression expected"); - return FAIL; - } - - pre_inc = PRE_INDEX; - - if (cp_address_offset (& p) == FAIL) - return FAIL; - - skip_whitespace (p); - - if (*p++ != ']') - { - inst.error = _("missing ]"); - return FAIL; - } - - skip_whitespace (p); - - if (*p == '!') - { - if (reg == REG_PC) - { - inst.error = _("pc may not be used with write-back"); - return FAIL; - } - - p++; - write_back = WRITE_BACK; - } - } - } - else - { - if (my_get_expression (&inst.reloc.exp, &p)) - return FAIL; - - inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM; - inst.reloc.exp.X_add_number -= 8; /* PC rel adjust */ - inst.reloc.pc_rel = 1; - inst.instruction |= (REG_PC << 16); - pre_inc = PRE_INDEX; - } - - inst.instruction |= write_back | pre_inc; - *str = p; - return SUCCESS; -} - -static void -do_nop (str, flags) - char * str; - unsigned long flags; -{ - /* Do nothing really. */ - inst.instruction |= flags; /* This is pointless. */ - end_of_line (str); - return; -} - -static void -do_mrs (str, flags) - char *str; - unsigned long flags; -{ - /* Only one syntax. */ - skip_whitespace (str); - - if (reg_required_here (&str, 12) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || psr_required_here (& str, CPSR_ALL, SPSR_ALL) == FAIL) - { - inst.error = _("<psr> expected"); - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -/* Three possible forms: "<psr>, Rm", "<psrf>, Rm", "<psrf>, #expression". */ -static void -do_msr (str, flags) - char * str; - unsigned long flags; -{ - int reg; - - skip_whitespace (str); - - if (psr_required_here (&str, CPSR_ALL, SPSR_ALL) == SUCCESS) - { - inst.instruction |= PSR_ALL; - - /* Sytax should be "<psr>, Rm" */ - if (skip_past_comma (&str) == FAIL - || (reg = reg_required_here (&str, 0)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - } - else - { - if (psr_required_here (& str, CPSR_FLG, SPSR_FLG) == SUCCESS) - inst.instruction |= PSR_FLAGS; - else if (psr_required_here (& str, CPSR_CTL, SPSR_CTL) == SUCCESS) - inst.instruction |= PSR_CONTROL; - else - { - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - /* Syntax could be "<psrf>, rm", "<psrf>, #expression" */ - - if ((reg = reg_required_here (& str, 0)) != FAIL) - ; - /* Immediate expression. */ - else if (is_immediate_prefix (* str)) - { - str ++; - inst.error = NULL; - - if (my_get_expression (& inst.reloc.exp, & str)) - { - inst.error = _("Register or shift expression expected"); - return; - } - - if (inst.reloc.exp.X_add_symbol) - { - inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; - inst.reloc.pc_rel = 0; - } - else - { - unsigned value = validate_immediate (inst.reloc.exp.X_add_number); - if (value == FAIL) - { - inst.error = _("Invalid constant"); - return; - } - - inst.instruction |= value; - } - - flags |= INST_IMMEDIATE; - } - else - { - inst.error = _("Error: unrecognised syntax for second argument to msr instruction"); - return; - } - } - - inst.error = NULL; - inst.instruction |= flags; - end_of_line (str); - return; -} - -/* Long Multiply Parser - UMULL RdLo, RdHi, Rm, Rs - SMULL RdLo, RdHi, Rm, Rs - UMLAL RdLo, RdHi, Rm, Rs - SMLAL RdLo, RdHi, Rm, Rs -*/ -static void -do_mull (str, flags) - char * str; - unsigned long flags; -{ - int rdlo, rdhi, rm, rs; - - /* Only one format "rdlo, rdhi, rm, rs" */ - skip_whitespace (str); - - if ((rdlo = reg_required_here (&str, 12)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || (rdhi = reg_required_here (&str, 16)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || (rm = reg_required_here (&str, 0)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - /* rdhi, rdlo and rm must all be different */ - if (rdlo == rdhi || rdlo == rm || rdhi == rm) - as_tsktsk (_("rdhi, rdlo and rm must all be different")); - - if (skip_past_comma (&str) == FAIL - || (rs = reg_required_here (&str, 8)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC) - { - inst.error = BAD_PC; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_mul (str, flags) - char * str; - unsigned long flags; -{ - int rd, rm; - - /* Only one format "rd, rm, rs" */ - skip_whitespace (str); - - if ((rd = reg_required_here (&str, 16)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (rd == REG_PC) - { - inst.error = BAD_PC; - return; - } - - if (skip_past_comma (&str) == FAIL - || (rm = reg_required_here (&str, 0)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (rm == REG_PC) - { - inst.error = BAD_PC; - return; - } - - if (rm == rd) - as_tsktsk (_("rd and rm should be different in mul")); - - if (skip_past_comma (&str) == FAIL - || (rm = reg_required_here (&str, 8)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (rm == REG_PC) - { - inst.error = BAD_PC; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_mla (str, flags) - char * str; - unsigned long flags; -{ - int rd, rm; - - /* Only one format "rd, rm, rs, rn" */ - skip_whitespace (str); - - if ((rd = reg_required_here (&str, 16)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (rd == REG_PC) - { - inst.error = BAD_PC; - return; - } - - if (skip_past_comma (&str) == FAIL - || (rm = reg_required_here (&str, 0)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (rm == REG_PC) - { - inst.error = BAD_PC; - return; - } - - if (rm == rd) - as_tsktsk (_("rd and rm should be different in mla")); - - if (skip_past_comma (&str) == FAIL - || (rd = reg_required_here (&str, 8)) == FAIL - || skip_past_comma (&str) == FAIL - || (rm = reg_required_here (&str, 12)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (rd == REG_PC || rm == REG_PC) - { - inst.error = BAD_PC; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -/* Returns the index into fp_values of a floating point number, or -1 if - not in the table. */ -static int -my_get_float_expression (str) - char ** str; -{ - LITTLENUM_TYPE words[MAX_LITTLENUMS]; - char * save_in; - expressionS exp; - int i; - int j; - - memset (words, 0, MAX_LITTLENUMS * sizeof (LITTLENUM_TYPE)); - /* Look for a raw floating point number */ - if ((save_in = atof_ieee (*str, 'x', words)) != NULL - && (is_end_of_line [(int)(*save_in)] || *save_in == '\0')) - { - for (i = 0; i < NUM_FLOAT_VALS; i++) - { - for (j = 0; j < MAX_LITTLENUMS; j++) - { - if (words[j] != fp_values[i][j]) - break; - } - - if (j == MAX_LITTLENUMS) - { - *str = save_in; - return i; - } - } - } - - /* Try and parse a more complex expression, this will probably fail - unless the code uses a floating point prefix (eg "0f") */ - save_in = input_line_pointer; - input_line_pointer = *str; - if (expression (&exp) == absolute_section - && exp.X_op == O_big - && exp.X_add_number < 0) - { - /* FIXME: 5 = X_PRECISION, should be #define'd where we can use it. - Ditto for 15. */ - if (gen_to_words (words, 5, (long)15) == 0) - { - for (i = 0; i < NUM_FLOAT_VALS; i++) - { - for (j = 0; j < MAX_LITTLENUMS; j++) - { - if (words[j] != fp_values[i][j]) - break; - } - - if (j == MAX_LITTLENUMS) - { - *str = input_line_pointer; - input_line_pointer = save_in; - return i; - } - } - } - } - - *str = input_line_pointer; - input_line_pointer = save_in; - return -1; -} - -/* Return true if anything in the expression is a bignum */ -static int -walk_no_bignums (sp) - symbolS * sp; -{ - if (symbol_get_value_expression (sp)->X_op == O_big) - return 1; - - if (symbol_get_value_expression (sp)->X_add_symbol) - { - return (walk_no_bignums (symbol_get_value_expression (sp)->X_add_symbol) - || (symbol_get_value_expression (sp)->X_op_symbol - && walk_no_bignums (symbol_get_value_expression (sp)->X_op_symbol))); - } - - return 0; -} - -static int -my_get_expression (ep, str) - expressionS * ep; - char ** str; -{ - char * save_in; - segT seg; - - save_in = input_line_pointer; - input_line_pointer = *str; - seg = expression (ep); - -#ifdef OBJ_AOUT - if (seg != absolute_section - && seg != text_section - && seg != data_section - && seg != bss_section - && seg != undefined_section) - { - inst.error = _("bad_segment"); - *str = input_line_pointer; - input_line_pointer = save_in; - return 1; - } -#endif - - /* Get rid of any bignums now, so that we don't generate an error for which - we can't establish a line number later on. Big numbers are never valid - in instructions, which is where this routine is always called. */ - if (ep->X_op == O_big - || (ep->X_add_symbol - && (walk_no_bignums (ep->X_add_symbol) - || (ep->X_op_symbol - && walk_no_bignums (ep->X_op_symbol))))) - { - inst.error = _("Invalid constant"); - *str = input_line_pointer; - input_line_pointer = save_in; - return 1; - } - - *str = input_line_pointer; - input_line_pointer = save_in; - return 0; -} - -/* unrestrict should be one if <shift> <register> is permitted for this - instruction */ - -static int -decode_shift (str, unrestrict) - char ** str; - int unrestrict; -{ - struct asm_shift * shft; - char * p; - char c; - - skip_whitespace (* str); - - for (p = *str; isalpha (*p); p++) - ; - - if (p == *str) - { - inst.error = _("Shift expression expected"); - return FAIL; - } - - c = *p; - *p = '\0'; - shft = (struct asm_shift *) hash_find (arm_shift_hsh, *str); - *p = c; - if (shft) - { - if (!strncmp (*str, "rrx", 3) - || !strncmp (*str, "RRX", 3)) - { - *str = p; - inst.instruction |= shft->value; - return SUCCESS; - } - - skip_whitespace (p); - - if (unrestrict && reg_required_here (&p, 8) != FAIL) - { - inst.instruction |= shft->value | SHIFT_BY_REG; - *str = p; - return SUCCESS; - } - else if (is_immediate_prefix (* p)) - { - inst.error = NULL; - p++; - if (my_get_expression (&inst.reloc.exp, &p)) - return FAIL; - - /* Validate some simple #expressions */ - if (inst.reloc.exp.X_op == O_constant) - { - unsigned num = inst.reloc.exp.X_add_number; - - /* Reject operations greater than 32, or lsl #32 */ - if (num > 32 || (num == 32 && shft->value == 0)) - { - inst.error = _("Invalid immediate shift"); - return FAIL; - } - - /* Shifts of zero should be converted to lsl (which is zero)*/ - if (num == 0) - { - *str = p; - return SUCCESS; - } - - /* Shifts of 32 are encoded as 0, for those shifts that - support it. */ - if (num == 32) - num = 0; - - inst.instruction |= (num << 7) | shft->value; - *str = p; - return SUCCESS; - } - - inst.reloc.type = BFD_RELOC_ARM_SHIFT_IMM; - inst.reloc.pc_rel = 0; - inst.instruction |= shft->value; - *str = p; - return SUCCESS; - } - else - { - inst.error = unrestrict ? _("shift requires register or #expression") - : _("shift requires #expression"); - *str = p; - return FAIL; - } - } - - inst.error = _("Shift expression expected"); - return FAIL; -} - -/* Do those data_ops which can take a negative immediate constant */ -/* by altering the instuction. A bit of a hack really */ -/* MOV <-> MVN - AND <-> BIC - ADC <-> SBC - by inverting the second operand, and - ADD <-> SUB - CMP <-> CMN - by negating the second operand. -*/ -static int -negate_data_op (instruction, value) - unsigned long * instruction; - unsigned long value; -{ - int op, new_inst; - unsigned long negated, inverted; - - negated = validate_immediate (-value); - inverted = validate_immediate (~value); - - op = (*instruction >> DATA_OP_SHIFT) & 0xf; - switch (op) - { - /* First negates */ - case OPCODE_SUB: /* ADD <-> SUB */ - new_inst = OPCODE_ADD; - value = negated; - break; - - case OPCODE_ADD: - new_inst = OPCODE_SUB; - value = negated; - break; - - case OPCODE_CMP: /* CMP <-> CMN */ - new_inst = OPCODE_CMN; - value = negated; - break; - - case OPCODE_CMN: - new_inst = OPCODE_CMP; - value = negated; - break; - - /* Now Inverted ops */ - case OPCODE_MOV: /* MOV <-> MVN */ - new_inst = OPCODE_MVN; - value = inverted; - break; - - case OPCODE_MVN: - new_inst = OPCODE_MOV; - value = inverted; - break; - - case OPCODE_AND: /* AND <-> BIC */ - new_inst = OPCODE_BIC; - value = inverted; - break; - - case OPCODE_BIC: - new_inst = OPCODE_AND; - value = inverted; - break; - - case OPCODE_ADC: /* ADC <-> SBC */ - new_inst = OPCODE_SBC; - value = inverted; - break; - - case OPCODE_SBC: - new_inst = OPCODE_ADC; - value = inverted; - break; - - /* We cannot do anything */ - default: - return FAIL; - } - - if (value == FAIL) - return FAIL; - - *instruction &= OPCODE_MASK; - *instruction |= new_inst << DATA_OP_SHIFT; - return value; -} - -static int -data_op2 (str) - char ** str; -{ - int value; - expressionS expr; - - skip_whitespace (* str); - - if (reg_required_here (str, 0) != FAIL) - { - if (skip_past_comma (str) == SUCCESS) - /* Shift operation on register. */ - return decode_shift (str, NO_SHIFT_RESTRICT); - - return SUCCESS; - } - else - { - /* Immediate expression */ - if (is_immediate_prefix (**str)) - { - (*str)++; - inst.error = NULL; - - if (my_get_expression (&inst.reloc.exp, str)) - return FAIL; - - if (inst.reloc.exp.X_add_symbol) - { - inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; - inst.reloc.pc_rel = 0; - } - else - { - if (skip_past_comma (str) == SUCCESS) - { - /* #x, y -- ie explicit rotation by Y */ - if (my_get_expression (&expr, str)) - return FAIL; - - if (expr.X_op != O_constant) - { - inst.error = _("Constant expression expected"); - return FAIL; - } - - /* Rotate must be a multiple of 2 */ - if (((unsigned) expr.X_add_number) > 30 - || (expr.X_add_number & 1) != 0 - || ((unsigned) inst.reloc.exp.X_add_number) > 255) - { - inst.error = _("Invalid constant"); - return FAIL; - } - inst.instruction |= INST_IMMEDIATE; - inst.instruction |= inst.reloc.exp.X_add_number; - inst.instruction |= expr.X_add_number << 7; - return SUCCESS; - } - - /* Implicit rotation, select a suitable one */ - value = validate_immediate (inst.reloc.exp.X_add_number); - - if (value == FAIL) - { - /* Can't be done, perhaps the code reads something like - "add Rd, Rn, #-n", where "sub Rd, Rn, #n" would be ok */ - if ((value = negate_data_op (&inst.instruction, - inst.reloc.exp.X_add_number)) - == FAIL) - { - inst.error = _("Invalid constant"); - return FAIL; - } - } - - inst.instruction |= value; - } - - inst.instruction |= INST_IMMEDIATE; - return SUCCESS; - } - - (*str)++; - inst.error = _("Register or shift expression expected"); - return FAIL; - } -} - -static int -fp_op2 (str) - char ** str; -{ - skip_whitespace (* str); - - if (fp_reg_required_here (str, 0) != FAIL) - return SUCCESS; - else - { - /* Immediate expression */ - if (*((*str)++) == '#') - { - int i; - - inst.error = NULL; - - skip_whitespace (* str); - - /* First try and match exact strings, this is to guarantee that - some formats will work even for cross assembly */ - - for (i = 0; fp_const[i]; i++) - { - if (strncmp (*str, fp_const[i], strlen (fp_const[i])) == 0) - { - char *start = *str; - - *str += strlen (fp_const[i]); - if (is_end_of_line[(int)**str] || **str == '\0') - { - inst.instruction |= i + 8; - return SUCCESS; - } - *str = start; - } - } - - /* Just because we didn't get a match doesn't mean that the - constant isn't valid, just that it is in a format that we - don't automatically recognize. Try parsing it with - the standard expression routines. */ - if ((i = my_get_float_expression (str)) >= 0) - { - inst.instruction |= i + 8; - return SUCCESS; - } - - inst.error = _("Invalid floating point immediate expression"); - return FAIL; - } - inst.error = _("Floating point register or immediate expression expected"); - return FAIL; - } -} - -static void -do_arit (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - if (reg_required_here (&str, 12) == FAIL - || skip_past_comma (&str) == FAIL - || reg_required_here (&str, 16) == FAIL - || skip_past_comma (&str) == FAIL - || data_op2 (&str) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_adr (str, flags) - char * str; - unsigned long flags; -{ - /* This is a pseudo-op of the form "adr rd, label" to be converted - into a relative address of the form "add rd, pc, #label-.-8" */ - - skip_whitespace (str); - - if (reg_required_here (&str, 12) == FAIL - || skip_past_comma (&str) == FAIL - || my_get_expression (&inst.reloc.exp, &str)) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - /* Frag hacking will turn this into a sub instruction if the offset turns - out to be negative. */ - inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; - inst.reloc.exp.X_add_number -= 8; /* PC relative adjust */ - inst.reloc.pc_rel = 1; - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_adrl (str, flags) - char * str; - unsigned long flags; -{ - /* This is a pseudo-op of the form "adrl rd, label" to be converted - into a relative address of the form: - add rd, pc, #low(label-.-8)" - add rd, rd, #high(label-.-8)" */ - - skip_whitespace (str); - - if (reg_required_here (& str, 12) == FAIL - || skip_past_comma (& str) == FAIL - || my_get_expression (& inst.reloc.exp, & str)) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - end_of_line (str); - - /* Frag hacking will turn this into a sub instruction if the offset turns - out to be negative. */ - inst.reloc.type = BFD_RELOC_ARM_ADRL_IMMEDIATE; - inst.reloc.exp.X_add_number -= 8; /* PC relative adjust */ - inst.reloc.pc_rel = 1; - inst.instruction |= flags; - inst.size = INSN_SIZE * 2; - - return; -} - -static void -do_cmp (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - if (reg_required_here (&str, 16) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || data_op2 (&str) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - if ((flags & 0x0000f000) == 0) - inst.instruction |= CONDS_BIT; - - end_of_line (str); - return; -} - -static void -do_mov (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - if (reg_required_here (&str, 12) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || data_op2 (&str) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static int -ldst_extend (str, hwse) - char ** str; - int hwse; -{ - int add = INDEX_UP; - - switch (**str) - { - case '#': - case '$': - (*str)++; - if (my_get_expression (& inst.reloc.exp, str)) - return FAIL; - - if (inst.reloc.exp.X_op == O_constant) - { - int value = inst.reloc.exp.X_add_number; - - if ((hwse && (value < -255 || value > 255)) - || (value < -4095 || value > 4095)) - { - inst.error = _("address offset too large"); - return FAIL; - } - - if (value < 0) - { - value = -value; - add = 0; - } - - /* Halfword and signextension instructions have the - immediate value split across bits 11..8 and bits 3..0 */ - if (hwse) - inst.instruction |= add | HWOFFSET_IMM | ((value >> 4) << 8) | (value & 0xF); - else - inst.instruction |= add | value; - } - else - { - if (hwse) - { - inst.instruction |= HWOFFSET_IMM; - inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8; - } - else - inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM; - inst.reloc.pc_rel = 0; - } - return SUCCESS; - - case '-': - add = 0; /* and fall through */ - case '+': - (*str)++; /* and fall through */ - default: - if (reg_required_here (str, 0) == FAIL) - return FAIL; - - if (hwse) - inst.instruction |= add; - else - { - inst.instruction |= add | OFFSET_REG; - if (skip_past_comma (str) == SUCCESS) - return decode_shift (str, SHIFT_RESTRICT); - } - - return SUCCESS; - } -} - -static void -do_ldst (str, flags) - char * str; - unsigned long flags; -{ - int halfword = 0; - int pre_inc = 0; - int conflict_reg; - int value; - - /* This is not ideal, but it is the simplest way of dealing with the - ARM7T halfword instructions (since they use a different - encoding, but the same mnemonic): */ - halfword = (flags & 0x80000000) != 0; - if (halfword) - { - /* This is actually a load/store of a halfword, or a - signed-extension load */ - if ((cpu_variant & ARM_HALFWORD) == 0) - { - inst.error - = _("Processor does not support halfwords or signed bytes"); - return; - } - - inst.instruction = (inst.instruction & COND_MASK) - | (flags & ~COND_MASK); - - flags = 0; - } - - skip_whitespace (str); - - if ((conflict_reg = reg_required_here (& str, 12)) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (& str) == FAIL) - { - inst.error = _("Address expected"); - return; - } - - if (*str == '[') - { - int reg; - - str++; - - skip_whitespace (str); - - if ((reg = reg_required_here (&str, 16)) == FAIL) - return; - - /* Conflicts can occur on stores as well as loads. */ - conflict_reg = (conflict_reg == reg); - - skip_whitespace (str); - - if (*str == ']') - { - str ++; - - if (skip_past_comma (&str) == SUCCESS) - { - /* [Rn],... (post inc) */ - if (ldst_extend (&str, halfword) == FAIL) - return; - if (conflict_reg) - as_warn (_("%s register same as write-back base"), - (inst.instruction & LOAD_BIT) ? _("destination") : _("source") ); - } - else - { - /* [Rn] */ - if (halfword) - inst.instruction |= HWOFFSET_IMM; - - skip_whitespace (str); - - if (*str == '!') - { - if (conflict_reg) - as_warn (_("%s register same as write-back base"), - (inst.instruction & LOAD_BIT) ? _("destination") : _("source") ); - str++; - inst.instruction |= WRITE_BACK; - } - - flags |= INDEX_UP; - if (! (flags & TRANS_BIT)) - pre_inc = 1; - } - } - else - { - /* [Rn,...] */ - if (skip_past_comma (&str) == FAIL) - { - inst.error = _("pre-indexed expression expected"); - return; - } - - pre_inc = 1; - if (ldst_extend (&str, halfword) == FAIL) - return; - - skip_whitespace (str); - - if (*str++ != ']') - { - inst.error = _("missing ]"); - return; - } - - skip_whitespace (str); - - if (*str == '!') - { - if (conflict_reg) - as_warn (_("%s register same as write-back base"), - (inst.instruction & LOAD_BIT) ? _("destination") : _("source") ); - str++; - inst.instruction |= WRITE_BACK; - } - } - } - else if (*str == '=') - { - /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op */ - str++; - - skip_whitespace (str); - - if (my_get_expression (&inst.reloc.exp, &str)) - return; - - if (inst.reloc.exp.X_op != O_constant - && inst.reloc.exp.X_op != O_symbol) - { - inst.error = _("Constant expression expected"); - return; - } - - if (inst.reloc.exp.X_op == O_constant - && (value = validate_immediate(inst.reloc.exp.X_add_number)) != FAIL) - { - /* This can be done with a mov instruction */ - inst.instruction &= LITERAL_MASK; - inst.instruction |= INST_IMMEDIATE | (OPCODE_MOV << DATA_OP_SHIFT); - inst.instruction |= (flags & COND_MASK) | (value & 0xfff); - end_of_line(str); - return; - } - else - { - /* Insert into literal pool */ - if (add_to_lit_pool () == FAIL) - { - if (!inst.error) - inst.error = _("literal pool insertion failed"); - return; - } - - /* Change the instruction exp to point to the pool */ - if (halfword) - { - inst.instruction |= HWOFFSET_IMM; - inst.reloc.type = BFD_RELOC_ARM_HWLITERAL; - } - else - inst.reloc.type = BFD_RELOC_ARM_LITERAL; - inst.reloc.pc_rel = 1; - inst.instruction |= (REG_PC << 16); - pre_inc = 1; - } - } - else - { - if (my_get_expression (&inst.reloc.exp, &str)) - return; - - if (halfword) - { - inst.instruction |= HWOFFSET_IMM; - inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8; - } - else - inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM; - inst.reloc.exp.X_add_number -= 8; /* PC rel adjust */ - inst.reloc.pc_rel = 1; - inst.instruction |= (REG_PC << 16); - pre_inc = 1; - } - - if (pre_inc && (flags & TRANS_BIT)) - inst.error = _("Pre-increment instruction with translate"); - - inst.instruction |= flags | (pre_inc ? PRE_INDEX : 0); - end_of_line (str); - return; -} - -static long -reg_list (strp) - char ** strp; -{ - char * str = *strp; - long range = 0; - int another_range; - - /* We come back here if we get ranges concatenated by '+' or '|' */ - do - { - another_range = 0; - - if (*str == '{') - { - int in_range = 0; - int cur_reg = -1; - - str++; - do - { - int reg; - - skip_whitespace (str); - - if ((reg = reg_required_here (& str, -1)) == FAIL) - return FAIL; - - if (in_range) - { - int i; - - if (reg <= cur_reg) - { - inst.error = _("Bad range in register list"); - return FAIL; - } - - for (i = cur_reg + 1; i < reg; i++) - { - if (range & (1 << i)) - as_tsktsk - (_("Warning: Duplicated register (r%d) in register list"), - i); - else - range |= 1 << i; - } - in_range = 0; - } - - if (range & (1 << reg)) - as_tsktsk (_("Warning: Duplicated register (r%d) in register list"), - reg); - else if (reg <= cur_reg) - as_tsktsk (_("Warning: Register range not in ascending order")); - - range |= 1 << reg; - cur_reg = reg; - } while (skip_past_comma (&str) != FAIL - || (in_range = 1, *str++ == '-')); - str--; - skip_whitespace (str); - - if (*str++ != '}') - { - inst.error = _("Missing `}'"); - return FAIL; - } - } - else - { - expressionS expr; - - if (my_get_expression (&expr, &str)) - return FAIL; - - if (expr.X_op == O_constant) - { - if (expr.X_add_number - != (expr.X_add_number & 0x0000ffff)) - { - inst.error = _("invalid register mask"); - return FAIL; - } - - if ((range & expr.X_add_number) != 0) - { - int regno = range & expr.X_add_number; - - regno &= -regno; - regno = (1 << regno) - 1; - as_tsktsk - (_("Warning: Duplicated register (r%d) in register list"), - regno); - } - - range |= expr.X_add_number; - } - else - { - if (inst.reloc.type != 0) - { - inst.error = _("expression too complex"); - return FAIL; - } - - memcpy (&inst.reloc.exp, &expr, sizeof (expressionS)); - inst.reloc.type = BFD_RELOC_ARM_MULTI; - inst.reloc.pc_rel = 0; - } - } - - skip_whitespace (str); - - if (*str == '|' || *str == '+') - { - str++; - another_range = 1; - } - } while (another_range); - - *strp = str; - return range; -} - -static void -do_ldmstm (str, flags) - char * str; - unsigned long flags; -{ - int base_reg; - long range; - - skip_whitespace (str); - - if ((base_reg = reg_required_here (&str, 16)) == FAIL) - return; - - if (base_reg == REG_PC) - { - inst.error = _("r15 not allowed as base register"); - return; - } - - skip_whitespace (str); - - if (*str == '!') - { - flags |= WRITE_BACK; - str++; - } - - if (skip_past_comma (&str) == FAIL - || (range = reg_list (&str)) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (*str == '^') - { - str++; - flags |= LDM_TYPE_2_OR_3; - } - - inst.instruction |= flags | range; - end_of_line (str); - return; -} - -static void -do_swi (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - /* Allow optional leading '#'. */ - if (is_immediate_prefix (*str)) - str++; - - if (my_get_expression (& inst.reloc.exp, & str)) - return; - - inst.reloc.type = BFD_RELOC_ARM_SWI; - inst.reloc.pc_rel = 0; - inst.instruction |= flags; - - end_of_line (str); - - return; -} - -static void -do_swap (str, flags) - char * str; - unsigned long flags; -{ - int reg; - - skip_whitespace (str); - - if ((reg = reg_required_here (&str, 12)) == FAIL) - return; - - if (reg == REG_PC) - { - inst.error = _("r15 not allowed in swap"); - return; - } - - if (skip_past_comma (&str) == FAIL - || (reg = reg_required_here (&str, 0)) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (reg == REG_PC) - { - inst.error = _("r15 not allowed in swap"); - return; - } - - if (skip_past_comma (&str) == FAIL - || *str++ != '[') - { - inst.error = BAD_ARGS; - return; - } - - skip_whitespace (str); - - if ((reg = reg_required_here (&str, 16)) == FAIL) - return; - - if (reg == REG_PC) - { - inst.error = BAD_PC; - return; - } - - skip_whitespace (str); - - if (*str++ != ']') - { - inst.error = _("missing ]"); - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_branch (str, flags) - char * str; - unsigned long flags; -{ - if (my_get_expression (&inst.reloc.exp, &str)) - return; - -#ifdef OBJ_ELF - { - char * save_in; - - /* ScottB: February 5, 1998 */ - /* Check to see of PLT32 reloc required for the instruction. */ - - /* arm_parse_reloc() works on input_line_pointer. - We actually want to parse the operands to the branch instruction - passed in 'str'. Save the input pointer and restore it later. */ - save_in = input_line_pointer; - input_line_pointer = str; - if (inst.reloc.exp.X_op == O_symbol - && *str == '(' - && arm_parse_reloc () == BFD_RELOC_ARM_PLT32) - { - inst.reloc.type = BFD_RELOC_ARM_PLT32; - inst.reloc.pc_rel = 0; - /* Modify str to point to after parsed operands, otherwise - end_of_line() will complain about the (PLT) left in str. */ - str = input_line_pointer; - } - else - { - inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH; - inst.reloc.pc_rel = 1; - } - input_line_pointer = save_in; - } -#else - inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH; - inst.reloc.pc_rel = 1; -#endif /* OBJ_ELF */ - - end_of_line (str); - return; -} - -static void -do_bx (str, flags) - char * str; - unsigned long flags; -{ - int reg; - - skip_whitespace (str); - - if ((reg = reg_required_here (&str, 0)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (reg == REG_PC) - inst.error = BAD_PC; - - end_of_line (str); -} - -static void -do_cdp (str, flags) - char * str; - unsigned long flags; -{ - /* Co-processor data operation. - Format: CDP{cond} CP#,<expr>,CRd,CRn,CRm{,<expr>} */ - skip_whitespace (str); - - if (co_proc_number (&str) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_opc_expr (&str, 20,4) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_reg_required_here (&str, 12) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_reg_required_here (&str, 16) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_reg_required_here (&str, 0) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == SUCCESS) - { - if (cp_opc_expr (&str, 5, 3) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - } - - end_of_line (str); - return; -} - -static void -do_lstc (str, flags) - char * str; - unsigned long flags; -{ - /* Co-processor register load/store. - Format: <LDC|STC{cond}[L] CP#,CRd,<address> */ - - skip_whitespace (str); - - if (co_proc_number (&str) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_reg_required_here (&str, 12) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_address_required_here (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_co_reg (str, flags) - char * str; - unsigned long flags; -{ - /* Co-processor register transfer. - Format: <MCR|MRC>{cond} CP#,<expr1>,Rd,CRn,CRm{,<expr2>} */ - - skip_whitespace (str); - - if (co_proc_number (&str) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_opc_expr (&str, 21, 3) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || reg_required_here (&str, 12) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_reg_required_here (&str, 16) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_reg_required_here (&str, 0) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == SUCCESS) - { - if (cp_opc_expr (&str, 5, 3) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - } - if (flags) - { - inst.error = BAD_COND; - } - - end_of_line (str); - return; -} - -static void -do_fp_ctrl (str, flags) - char * str; - unsigned long flags; -{ - /* FP control registers. - Format: <WFS|RFS|WFC|RFC>{cond} Rn */ - - skip_whitespace (str); - - if (reg_required_here (&str, 12) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - end_of_line (str); - return; -} - -static void -do_fp_ldst (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - switch (inst.suffix) - { - case SUFF_S: - break; - case SUFF_D: - inst.instruction |= CP_T_X; - break; - case SUFF_E: - inst.instruction |= CP_T_Y; - break; - case SUFF_P: - inst.instruction |= CP_T_X | CP_T_Y; - break; - default: - abort (); - } - - if (fp_reg_required_here (&str, 12) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || cp_address_required_here (&str) == FAIL) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - end_of_line (str); -} - -static void -do_fp_ldmstm (str, flags) - char * str; - unsigned long flags; -{ - int num_regs; - - skip_whitespace (str); - - if (fp_reg_required_here (&str, 12) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - /* Get Number of registers to transfer */ - if (skip_past_comma (&str) == FAIL - || my_get_expression (&inst.reloc.exp, &str)) - { - if (! inst.error) - inst.error = _("constant expression expected"); - return; - } - - if (inst.reloc.exp.X_op != O_constant) - { - inst.error = _("Constant value required for number of registers"); - return; - } - - num_regs = inst.reloc.exp.X_add_number; - - if (num_regs < 1 || num_regs > 4) - { - inst.error = _("number of registers must be in the range [1:4]"); - return; - } - - switch (num_regs) - { - case 1: - inst.instruction |= CP_T_X; - break; - case 2: - inst.instruction |= CP_T_Y; - break; - case 3: - inst.instruction |= CP_T_Y | CP_T_X; - break; - case 4: - break; - default: - abort (); - } - - if (flags) - { - int reg; - int write_back; - int offset; - - /* The instruction specified "ea" or "fd", so we can only accept - [Rn]{!}. The instruction does not really support stacking or - unstacking, so we have to emulate these by setting appropriate - bits and offsets. */ - if (skip_past_comma (&str) == FAIL - || *str != '[') - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - str++; - skip_whitespace (str); - - if ((reg = reg_required_here (&str, 16)) == FAIL) - return; - - skip_whitespace (str); - - if (*str != ']') - { - inst.error = BAD_ARGS; - return; - } - - str++; - if (*str == '!') - { - write_back = 1; - str++; - if (reg == REG_PC) - { - inst.error = _("R15 not allowed as base register with write-back"); - return; - } - } - else - write_back = 0; - - if (flags & CP_T_Pre) - { - /* Pre-decrement */ - offset = 3 * num_regs; - if (write_back) - flags |= CP_T_WB; - } - else - { - /* Post-increment */ - if (write_back) - { - flags |= CP_T_WB; - offset = 3 * num_regs; - } - else - { - /* No write-back, so convert this into a standard pre-increment - instruction -- aesthetically more pleasing. */ - flags = CP_T_Pre | CP_T_UD; - offset = 0; - } - } - - inst.instruction |= flags | offset; - } - else if (skip_past_comma (&str) == FAIL - || cp_address_required_here (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - end_of_line (str); -} - -static void -do_fp_dyadic (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - switch (inst.suffix) - { - case SUFF_S: - break; - case SUFF_D: - inst.instruction |= 0x00000080; - break; - case SUFF_E: - inst.instruction |= 0x00080000; - break; - default: - abort (); - } - - if (fp_reg_required_here (&str, 12) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || fp_reg_required_here (&str, 16) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || fp_op2 (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_fp_monadic (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - switch (inst.suffix) - { - case SUFF_S: - break; - case SUFF_D: - inst.instruction |= 0x00000080; - break; - case SUFF_E: - inst.instruction |= 0x00080000; - break; - default: - abort (); - } - - if (fp_reg_required_here (&str, 12) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || fp_op2 (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_fp_cmp (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - if (fp_reg_required_here (&str, 16) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || fp_op2 (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_fp_from_reg (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - switch (inst.suffix) - { - case SUFF_S: - break; - case SUFF_D: - inst.instruction |= 0x00000080; - break; - case SUFF_E: - inst.instruction |= 0x00080000; - break; - default: - abort (); - } - - if (fp_reg_required_here (&str, 16) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) == FAIL - || reg_required_here (&str, 12) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -static void -do_fp_to_reg (str, flags) - char * str; - unsigned long flags; -{ - skip_whitespace (str); - - if (reg_required_here (&str, 12) == FAIL) - return; - - if (skip_past_comma (&str) == FAIL - || fp_reg_required_here (&str, 0) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.instruction |= flags; - end_of_line (str); - return; -} - -/* Thumb specific routines */ - -/* Parse and validate that a register is of the right form, this saves - repeated checking of this information in many similar cases. - Unlike the 32-bit case we do not insert the register into the opcode - here, since the position is often unknown until the full instruction - has been parsed. */ -static int -thumb_reg (strp, hi_lo) - char ** strp; - int hi_lo; -{ - int reg; - - if ((reg = reg_required_here (strp, -1)) == FAIL) - return FAIL; - - switch (hi_lo) - { - case THUMB_REG_LO: - if (reg > 7) - { - inst.error = _("lo register required"); - return FAIL; - } - break; - - case THUMB_REG_HI: - if (reg < 8) - { - inst.error = _("hi register required"); - return FAIL; - } - break; - - default: - break; - } - - return reg; -} - -/* Parse an add or subtract instruction, SUBTRACT is non-zero if the opcode - was SUB. */ -static void -thumb_add_sub (str, subtract) - char * str; - int subtract; -{ - int Rd, Rs, Rn = FAIL; - - skip_whitespace (str); - - if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL - || skip_past_comma (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (is_immediate_prefix (*str)) - { - Rs = Rd; - str++; - if (my_get_expression (&inst.reloc.exp, &str)) - return; - } - else - { - if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) - return; - - if (skip_past_comma (&str) == FAIL) - { - /* Two operand format, shuffle the registers and pretend there - are 3 */ - Rn = Rs; - Rs = Rd; - } - else if (is_immediate_prefix (*str)) - { - str++; - if (my_get_expression (&inst.reloc.exp, &str)) - return; - } - else if ((Rn = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) - return; - } - - /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL; - for the latter case, EXPR contains the immediate that was found. */ - if (Rn != FAIL) - { - /* All register format. */ - if (Rd > 7 || Rs > 7 || Rn > 7) - { - if (Rs != Rd) - { - inst.error = _("dest and source1 must be the same register"); - return; - } - - /* Can't do this for SUB */ - if (subtract) - { - inst.error = _("subtract valid only on lo regs"); - return; - } - - inst.instruction = (T_OPCODE_ADD_HI - | (Rd > 7 ? THUMB_H1 : 0) - | (Rn > 7 ? THUMB_H2 : 0)); - inst.instruction |= (Rd & 7) | ((Rn & 7) << 3); - } - else - { - inst.instruction = subtract ? T_OPCODE_SUB_R3 : T_OPCODE_ADD_R3; - inst.instruction |= Rd | (Rs << 3) | (Rn << 6); - } - } - else - { - /* Immediate expression, now things start to get nasty. */ - - /* First deal with HI regs, only very restricted cases allowed: - Adjusting SP, and using PC or SP to get an address. */ - if ((Rd > 7 && (Rd != REG_SP || Rs != REG_SP)) - || (Rs > 7 && Rs != REG_SP && Rs != REG_PC)) - { - inst.error = _("invalid Hi register with immediate"); - return; - } - - if (inst.reloc.exp.X_op != O_constant) - { - /* Value isn't known yet, all we can do is store all the fragments - we know about in the instruction and let the reloc hacking - work it all out. */ - inst.instruction = (subtract ? 0x8000 : 0) | (Rd << 4) | Rs; - inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD; - } - else - { - int offset = inst.reloc.exp.X_add_number; - - if (subtract) - offset = -offset; - - if (offset < 0) - { - offset = -offset; - subtract = 1; - - /* Quick check, in case offset is MIN_INT */ - if (offset < 0) - { - inst.error = _("immediate value out of range"); - return; - } - } - else - subtract = 0; - - if (Rd == REG_SP) - { - if (offset & ~0x1fc) - { - inst.error = _("invalid immediate value for stack adjust"); - return; - } - inst.instruction = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST; - inst.instruction |= offset >> 2; - } - else if (Rs == REG_PC || Rs == REG_SP) - { - if (subtract - || (offset & ~0x3fc)) - { - inst.error = _("invalid immediate for address calculation"); - return; - } - inst.instruction = (Rs == REG_PC ? T_OPCODE_ADD_PC - : T_OPCODE_ADD_SP); - inst.instruction |= (Rd << 8) | (offset >> 2); - } - else if (Rs == Rd) - { - if (offset & ~0xff) - { - inst.error = _("immediate value out of range"); - return; - } - inst.instruction = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8; - inst.instruction |= (Rd << 8) | offset; - } - else - { - if (offset & ~0x7) - { - inst.error = _("immediate value out of range"); - return; - } - inst.instruction = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3; - inst.instruction |= Rd | (Rs << 3) | (offset << 6); - } - } - } - end_of_line (str); -} - -static void -thumb_shift (str, shift) - char * str; - int shift; -{ - int Rd, Rs, Rn = FAIL; - - skip_whitespace (str); - - if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL - || skip_past_comma (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (is_immediate_prefix (*str)) - { - /* Two operand immediate format, set Rs to Rd. */ - Rs = Rd; - str++; - if (my_get_expression (&inst.reloc.exp, &str)) - return; - } - else - { - if ((Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL) - return; - - if (skip_past_comma (&str) == FAIL) - { - /* Two operand format, shuffle the registers and pretend there - are 3 */ - Rn = Rs; - Rs = Rd; - } - else if (is_immediate_prefix (*str)) - { - str++; - if (my_get_expression (&inst.reloc.exp, &str)) - return; - } - else if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL) - return; - } - - /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL; - for the latter case, EXPR contains the immediate that was found. */ - - if (Rn != FAIL) - { - if (Rs != Rd) - { - inst.error = _("source1 and dest must be same register"); - return; - } - - switch (shift) - { - case THUMB_ASR: inst.instruction = T_OPCODE_ASR_R; break; - case THUMB_LSL: inst.instruction = T_OPCODE_LSL_R; break; - case THUMB_LSR: inst.instruction = T_OPCODE_LSR_R; break; - } - - inst.instruction |= Rd | (Rn << 3); - } - else - { - switch (shift) - { - case THUMB_ASR: inst.instruction = T_OPCODE_ASR_I; break; - case THUMB_LSL: inst.instruction = T_OPCODE_LSL_I; break; - case THUMB_LSR: inst.instruction = T_OPCODE_LSR_I; break; - } - - if (inst.reloc.exp.X_op != O_constant) - { - /* Value isn't known yet, create a dummy reloc and let reloc - hacking fix it up */ - - inst.reloc.type = BFD_RELOC_ARM_THUMB_SHIFT; - } - else - { - unsigned shift_value = inst.reloc.exp.X_add_number; - - if (shift_value > 32 || (shift_value == 32 && shift == THUMB_LSL)) - { - inst.error = _("Invalid immediate for shift"); - return; - } - - /* Shifts of zero are handled by converting to LSL */ - if (shift_value == 0) - inst.instruction = T_OPCODE_LSL_I; - - /* Shifts of 32 are encoded as a shift of zero */ - if (shift_value == 32) - shift_value = 0; - - inst.instruction |= shift_value << 6; - } - - inst.instruction |= Rd | (Rs << 3); - } - end_of_line (str); -} - -static void -thumb_mov_compare (str, move) - char * str; - int move; -{ - int Rd, Rs = FAIL; - - skip_whitespace (str); - - if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL - || skip_past_comma (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (is_immediate_prefix (*str)) - { - str++; - if (my_get_expression (&inst.reloc.exp, &str)) - return; - } - else if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) - return; - - if (Rs != FAIL) - { - if (Rs < 8 && Rd < 8) - { - if (move == THUMB_MOVE) - /* A move of two lowregs is encoded as ADD Rd, Rs, #0 - since a MOV instruction produces unpredictable results */ - inst.instruction = T_OPCODE_ADD_I3; - else - inst.instruction = T_OPCODE_CMP_LR; - inst.instruction |= Rd | (Rs << 3); - } - else - { - if (move == THUMB_MOVE) - inst.instruction = T_OPCODE_MOV_HR; - else - inst.instruction = T_OPCODE_CMP_HR; - - if (Rd > 7) - inst.instruction |= THUMB_H1; - - if (Rs > 7) - inst.instruction |= THUMB_H2; - - inst.instruction |= (Rd & 7) | ((Rs & 7) << 3); - } - } - else - { - if (Rd > 7) - { - inst.error = _("only lo regs allowed with immediate"); - return; - } - - if (move == THUMB_MOVE) - inst.instruction = T_OPCODE_MOV_I8; - else - inst.instruction = T_OPCODE_CMP_I8; - - inst.instruction |= Rd << 8; - - if (inst.reloc.exp.X_op != O_constant) - inst.reloc.type = BFD_RELOC_ARM_THUMB_IMM; - else - { - unsigned value = inst.reloc.exp.X_add_number; - - if (value > 255) - { - inst.error = _("invalid immediate"); - return; - } - - inst.instruction |= value; - } - } - - end_of_line (str); -} - -static void -thumb_load_store (str, load_store, size) - char * str; - int load_store; - int size; -{ - int Rd, Rb, Ro = FAIL; - - skip_whitespace (str); - - if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL - || skip_past_comma (&str) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (*str == '[') - { - str++; - if ((Rb = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) - return; - - if (skip_past_comma (&str) != FAIL) - { - if (is_immediate_prefix (*str)) - { - str++; - if (my_get_expression (&inst.reloc.exp, &str)) - return; - } - else if ((Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL) - return; - } - else - { - inst.reloc.exp.X_op = O_constant; - inst.reloc.exp.X_add_number = 0; - } - - if (*str != ']') - { - inst.error = _("expected ']'"); - return; - } - str++; - } - else if (*str == '=') - { - /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op */ - str++; - - skip_whitespace (str); - - if (my_get_expression (& inst.reloc.exp, & str)) - return; - - end_of_line (str); - - if ( inst.reloc.exp.X_op != O_constant - && inst.reloc.exp.X_op != O_symbol) - { - inst.error = "Constant expression expected"; - return; - } - - if (inst.reloc.exp.X_op == O_constant - && ((inst.reloc.exp.X_add_number & ~0xFF) == 0)) - { - /* This can be done with a mov instruction */ - - inst.instruction = T_OPCODE_MOV_I8 | (Rd << 8); - inst.instruction |= inst.reloc.exp.X_add_number; - return; - } - - /* Insert into literal pool */ - if (add_to_lit_pool () == FAIL) - { - if (!inst.error) - inst.error = "literal pool insertion failed"; - return; - } - - inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; - inst.reloc.pc_rel = 1; - inst.instruction = T_OPCODE_LDR_PC | (Rd << 8); - inst.reloc.exp.X_add_number += 4; /* Adjust ARM pipeline offset to Thumb */ - - return; - } - else - { - if (my_get_expression (&inst.reloc.exp, &str)) - return; - - inst.instruction = T_OPCODE_LDR_PC | (Rd << 8); - inst.reloc.pc_rel = 1; - inst.reloc.exp.X_add_number -= 4; /* Pipeline offset */ - inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; - end_of_line (str); - return; - } - - if (Rb == REG_PC || Rb == REG_SP) - { - if (size != THUMB_WORD) - { - inst.error = _("byte or halfword not valid for base register"); - return; - } - else if (Rb == REG_PC && load_store != THUMB_LOAD) - { - inst.error = _("R15 based store not allowed"); - return; - } - else if (Ro != FAIL) - { - inst.error = _("Invalid base register for register offset"); - return; - } - - if (Rb == REG_PC) - inst.instruction = T_OPCODE_LDR_PC; - else if (load_store == THUMB_LOAD) - inst.instruction = T_OPCODE_LDR_SP; - else - inst.instruction = T_OPCODE_STR_SP; - - inst.instruction |= Rd << 8; - if (inst.reloc.exp.X_op == O_constant) - { - unsigned offset = inst.reloc.exp.X_add_number; - - if (offset & ~0x3fc) - { - inst.error = _("invalid offset"); - return; - } - - inst.instruction |= offset >> 2; - } - else - inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; - } - else if (Rb > 7) - { - inst.error = _("invalid base register in load/store"); - return; - } - else if (Ro == FAIL) - { - /* Immediate offset */ - if (size == THUMB_WORD) - inst.instruction = (load_store == THUMB_LOAD - ? T_OPCODE_LDR_IW : T_OPCODE_STR_IW); - else if (size == THUMB_HALFWORD) - inst.instruction = (load_store == THUMB_LOAD - ? T_OPCODE_LDR_IH : T_OPCODE_STR_IH); - else - inst.instruction = (load_store == THUMB_LOAD - ? T_OPCODE_LDR_IB : T_OPCODE_STR_IB); - - inst.instruction |= Rd | (Rb << 3); - - if (inst.reloc.exp.X_op == O_constant) - { - unsigned offset = inst.reloc.exp.X_add_number; - - if (offset & ~(0x1f << size)) - { - inst.error = _("Invalid offset"); - return; - } - inst.instruction |= (offset >> size) << 6; - } - else - inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; - } - else - { - /* Register offset */ - if (size == THUMB_WORD) - inst.instruction = (load_store == THUMB_LOAD - ? T_OPCODE_LDR_RW : T_OPCODE_STR_RW); - else if (size == THUMB_HALFWORD) - inst.instruction = (load_store == THUMB_LOAD - ? T_OPCODE_LDR_RH : T_OPCODE_STR_RH); - else - inst.instruction = (load_store == THUMB_LOAD - ? T_OPCODE_LDR_RB : T_OPCODE_STR_RB); - - inst.instruction |= Rd | (Rb << 3) | (Ro << 6); - } - - end_of_line (str); -} - -static void -do_t_nop (str) - char * str; -{ - /* Do nothing */ - end_of_line (str); - return; -} - -/* Handle the Format 4 instructions that do not have equivalents in other - formats. That is, ADC, AND, EOR, SBC, ROR, TST, NEG, CMN, ORR, MUL, - BIC and MVN. */ -static void -do_t_arit (str) - char * str; -{ - int Rd, Rs, Rn; - - skip_whitespace (str); - - if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL - || skip_past_comma (&str) == FAIL - || (Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL) - { - inst.error = BAD_ARGS; - return; - } - - if (skip_past_comma (&str) != FAIL) - { - /* Three operand format not allowed for TST, CMN, NEG and MVN. - (It isn't allowed for CMP either, but that isn't handled by this - function.) */ - if (inst.instruction == T_OPCODE_TST - || inst.instruction == T_OPCODE_CMN - || inst.instruction == T_OPCODE_NEG - || inst.instruction == T_OPCODE_MVN) - { - inst.error = BAD_ARGS; - return; - } - - if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL) - return; - - if (Rs != Rd) - { - inst.error = _("dest and source1 one must be the same register"); - return; - } - Rs = Rn; - } - - if (inst.instruction == T_OPCODE_MUL - && Rs == Rd) - as_tsktsk (_("Rs and Rd must be different in MUL")); - - inst.instruction |= Rd | (Rs << 3); - end_of_line (str); -} - -static void -do_t_add (str) - char * str; -{ - thumb_add_sub (str, 0); -} - -static void -do_t_asr (str) - char * str; -{ - thumb_shift (str, THUMB_ASR); -} - -static void -do_t_branch9 (str) - char * str; -{ - if (my_get_expression (&inst.reloc.exp, &str)) - return; - inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH9; - inst.reloc.pc_rel = 1; - end_of_line (str); -} - -static void -do_t_branch12 (str) - char * str; -{ - if (my_get_expression (&inst.reloc.exp, &str)) - return; - inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH12; - inst.reloc.pc_rel = 1; - end_of_line (str); -} - -/* Find the real, Thumb encoded start of a Thumb function. */ - -static symbolS * -find_real_start (symbolP) - symbolS * symbolP; -{ - char * real_start; - const char * name = S_GET_NAME (symbolP); - symbolS * new_target; - - /* This definiton must agree with the one in gcc/config/arm/thumb.c */ -#define STUB_NAME ".real_start_of" - - if (name == NULL) - abort(); - - /* Names that start with '.' are local labels, not function entry points. - The compiler may generate BL instructions to these labels because it - needs to perform a branch to a far away location. */ - if (name[0] == '.') - return symbolP; - - real_start = malloc (strlen (name) + strlen (STUB_NAME) + 1); - sprintf (real_start, "%s%s", STUB_NAME, name); - - new_target = symbol_find (real_start); - - if (new_target == NULL) - { - as_warn ("Failed to find real start of function: %s\n", name); - new_target = symbolP; - } - - free (real_start); - - return new_target; -} - - -static void -do_t_branch23 (str) - char * str; -{ - if (my_get_expression (& inst.reloc.exp, & str)) - return; - - inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH23; - inst.reloc.pc_rel = 1; - end_of_line (str); - - /* If the destination of the branch is a defined symbol which does not have - the THUMB_FUNC attribute, then we must be calling a function which has - the (interfacearm) attribute. We look for the Thumb entry point to that - function and change the branch to refer to that function instead. */ - if ( inst.reloc.exp.X_op == O_symbol - && inst.reloc.exp.X_add_symbol != NULL - && S_IS_DEFINED (inst.reloc.exp.X_add_symbol) - && ! THUMB_IS_FUNC (inst.reloc.exp.X_add_symbol)) - inst.reloc.exp.X_add_symbol = find_real_start (inst.reloc.exp.X_add_symbol); -} - -static void -do_t_bx (str) - char * str; -{ - int reg; - - skip_whitespace (str); - - if ((reg = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) - return; - - /* This sets THUMB_H2 from the top bit of reg. */ - inst.instruction |= reg << 3; - - /* ??? FIXME: Should add a hacky reloc here if reg is REG_PC. The reloc - should cause the alignment to be checked once it is known. This is - because BX PC only works if the instruction is word aligned. */ - - end_of_line (str); -} - -static void -do_t_compare (str) - char * str; -{ - thumb_mov_compare (str, THUMB_COMPARE); -} - -static void -do_t_ldmstm (str) - char * str; -{ - int Rb; - long range; - - skip_whitespace (str); - - if ((Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL) - return; - - if (*str != '!') - as_warn (_("Inserted missing '!': load/store multiple always writes back base register")); - else - str++; - - if (skip_past_comma (&str) == FAIL - || (range = reg_list (&str)) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (inst.reloc.type != BFD_RELOC_NONE) - { - /* This really doesn't seem worth it. */ - inst.reloc.type = BFD_RELOC_NONE; - inst.error = _("Expression too complex"); - return; - } - - if (range & ~0xff) - { - inst.error = _("only lo-regs valid in load/store multiple"); - return; - } - - inst.instruction |= (Rb << 8) | range; - end_of_line (str); -} - -static void -do_t_ldr (str) - char * str; -{ - thumb_load_store (str, THUMB_LOAD, THUMB_WORD); -} - -static void -do_t_ldrb (str) - char * str; -{ - thumb_load_store (str, THUMB_LOAD, THUMB_BYTE); -} - -static void -do_t_ldrh (str) - char * str; -{ - thumb_load_store (str, THUMB_LOAD, THUMB_HALFWORD); -} - -static void -do_t_lds (str) - char * str; -{ - int Rd, Rb, Ro; - - skip_whitespace (str); - - if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL - || skip_past_comma (&str) == FAIL - || *str++ != '[' - || (Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL - || skip_past_comma (&str) == FAIL - || (Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL - || *str++ != ']') - { - if (! inst.error) - inst.error = _("Syntax: ldrs[b] Rd, [Rb, Ro]"); - return; - } - - inst.instruction |= Rd | (Rb << 3) | (Ro << 6); - end_of_line (str); -} - -static void -do_t_lsl (str) - char * str; -{ - thumb_shift (str, THUMB_LSL); -} - -static void -do_t_lsr (str) - char * str; -{ - thumb_shift (str, THUMB_LSR); -} - -static void -do_t_mov (str) - char * str; -{ - thumb_mov_compare (str, THUMB_MOVE); -} - -static void -do_t_push_pop (str) - char * str; -{ - long range; - - skip_whitespace (str); - - if ((range = reg_list (&str)) == FAIL) - { - if (! inst.error) - inst.error = BAD_ARGS; - return; - } - - if (inst.reloc.type != BFD_RELOC_NONE) - { - /* This really doesn't seem worth it. */ - inst.reloc.type = BFD_RELOC_NONE; - inst.error = _("Expression too complex"); - return; - } - - if (range & ~0xff) - { - if ((inst.instruction == T_OPCODE_PUSH - && (range & ~0xff) == 1 << REG_LR) - || (inst.instruction == T_OPCODE_POP - && (range & ~0xff) == 1 << REG_PC)) - { - inst.instruction |= THUMB_PP_PC_LR; - range &= 0xff; - } - else - { - inst.error = _("invalid register list to push/pop instruction"); - return; - } - } - - inst.instruction |= range; - end_of_line (str); -} - -static void -do_t_str (str) - char * str; -{ - thumb_load_store (str, THUMB_STORE, THUMB_WORD); -} - -static void -do_t_strb (str) - char * str; -{ - thumb_load_store (str, THUMB_STORE, THUMB_BYTE); -} - -static void -do_t_strh (str) - char * str; -{ - thumb_load_store (str, THUMB_STORE, THUMB_HALFWORD); -} - -static void -do_t_sub (str) - char * str; -{ - thumb_add_sub (str, 1); -} - -static void -do_t_swi (str) - char * str; -{ - skip_whitespace (str); - - if (my_get_expression (&inst.reloc.exp, &str)) - return; - - inst.reloc.type = BFD_RELOC_ARM_SWI; - end_of_line (str); - return; -} - -static void -do_t_adr (str) - char * str; -{ - /* This is a pseudo-op of the form "adr rd, label" to be converted - into a relative address of the form "add rd, pc, #label-.-4" */ - skip_whitespace (str); - - if (reg_required_here (&str, 4) == FAIL /* Store Rd in temporary location inside instruction. */ - || skip_past_comma (&str) == FAIL - || my_get_expression (&inst.reloc.exp, &str)) - { - if (!inst.error) - inst.error = BAD_ARGS; - return; - } - - inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD; - inst.reloc.exp.X_add_number -= 4; /* PC relative adjust */ - inst.reloc.pc_rel = 1; - inst.instruction |= REG_PC; /* Rd is already placed into the instruction */ - end_of_line (str); -} - -static void -insert_reg (entry) - int entry; -{ - int len = strlen (reg_table[entry].name) + 2; - char * buf = (char *) xmalloc (len); - char * buf2 = (char *) xmalloc (len); - int i = 0; - -#ifdef REGISTER_PREFIX - buf[i++] = REGISTER_PREFIX; -#endif - - strcpy (buf + i, reg_table[entry].name); - - for (i = 0; buf[i]; i++) - buf2[i] = islower (buf[i]) ? toupper (buf[i]) : buf[i]; - - buf2[i] = '\0'; - - hash_insert (arm_reg_hsh, buf, (PTR) ®_table[entry]); - hash_insert (arm_reg_hsh, buf2, (PTR) ®_table[entry]); -} - -static void -insert_reg_alias (str, regnum) - char *str; - int regnum; -{ - struct reg_entry *new = - (struct reg_entry *)xmalloc (sizeof (struct reg_entry)); - char *name = xmalloc (strlen (str) + 1); - strcpy (name, str); - - new->name = name; - new->number = regnum; - - hash_insert (arm_reg_hsh, name, (PTR) new); -} - -static void -set_constant_flonums () -{ - int i; - - for (i = 0; i < NUM_FLOAT_VALS; i++) - if (atof_ieee ((char *)fp_const[i], 'x', fp_values[i]) == NULL) - abort (); -} - -void -md_begin () -{ - int i; - - if ( (arm_ops_hsh = hash_new ()) == NULL - || (arm_tops_hsh = hash_new ()) == NULL - || (arm_cond_hsh = hash_new ()) == NULL - || (arm_shift_hsh = hash_new ()) == NULL - || (arm_reg_hsh = hash_new ()) == NULL - || (arm_psr_hsh = hash_new ()) == NULL) - as_fatal (_("Virtual memory exhausted")); - - for (i = 0; i < sizeof (insns) / sizeof (struct asm_opcode); i++) - hash_insert (arm_ops_hsh, insns[i].template, (PTR) (insns + i)); - for (i = 0; i < sizeof (tinsns) / sizeof (struct thumb_opcode); i++) - hash_insert (arm_tops_hsh, tinsns[i].template, (PTR) (tinsns + i)); - for (i = 0; i < sizeof (conds) / sizeof (struct asm_cond); i++) - hash_insert (arm_cond_hsh, conds[i].template, (PTR) (conds + i)); - for (i = 0; i < sizeof (shift) / sizeof (struct asm_shift); i++) - hash_insert (arm_shift_hsh, shift[i].template, (PTR) (shift + i)); - for (i = 0; i < sizeof (psrs) / sizeof (struct asm_psr); i++) - hash_insert (arm_psr_hsh, psrs[i].template, (PTR) (psrs + i)); - - for (i = 0; reg_table[i].name; i++) - insert_reg (i); - - set_constant_flonums (); - -#if defined OBJ_COFF || defined OBJ_ELF - { - unsigned int flags = 0; - - /* Set the flags in the private structure */ - if (uses_apcs_26) flags |= F_APCS26; - if (support_interwork) flags |= F_INTERWORK; - if (uses_apcs_float) flags |= F_APCS_FLOAT; - if (pic_code) flags |= F_PIC; - if ((cpu_variant & FPU_ALL) == FPU_NONE) flags |= F_SOFT_FLOAT; - - bfd_set_private_flags (stdoutput, flags); - } -#endif - - { - unsigned mach; - - /* Record the CPU type as well */ - switch (cpu_variant & ARM_CPU_MASK) - { - case ARM_2: - mach = bfd_mach_arm_2; - break; - - case ARM_3: /* also ARM_250 */ - mach = bfd_mach_arm_2a; - break; - - default: - case ARM_6 | ARM_3 | ARM_2: /* Actually no CPU type defined */ - mach = bfd_mach_arm_4; - break; - - case ARM_7: /* also ARM_6 */ - mach = bfd_mach_arm_3; - break; - } - - /* Catch special cases. */ - if (cpu_variant != (FPU_DEFAULT | CPU_DEFAULT)) - { - if (cpu_variant & (ARM_EXT_V5 & ARM_THUMB)) - mach = bfd_mach_arm_5T; - else if (cpu_variant & ARM_EXT_V5) - mach = bfd_mach_arm_5; - else if (cpu_variant & ARM_THUMB) - mach = bfd_mach_arm_4T; - else if ((cpu_variant & ARM_ARCH_V4) == ARM_ARCH_V4) - mach = bfd_mach_arm_4; - else if (cpu_variant & ARM_LONGMUL) - mach = bfd_mach_arm_3M; - } - - bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach); - } -} - -/* Turn an integer of n bytes (in val) into a stream of bytes appropriate - for use in the a.out file, and stores them in the array pointed to by buf. - This knows about the endian-ness of the target machine and does - THE RIGHT THING, whatever it is. Possible values for n are 1 (byte) - 2 (short) and 4 (long) Floating numbers are put out as a series of - LITTLENUMS (shorts, here at least). */ -void -md_number_to_chars (buf, val, n) - char * buf; - valueT val; - int n; -{ - if (target_big_endian) - number_to_chars_bigendian (buf, val, n); - else - number_to_chars_littleendian (buf, val, n); -} - -static valueT -md_chars_to_number (buf, n) - char * buf; - int n; -{ - valueT result = 0; - unsigned char * where = (unsigned char *) buf; - - if (target_big_endian) - { - while (n--) - { - result <<= 8; - result |= (*where++ & 255); - } - } - else - { - while (n--) - { - result <<= 8; - result |= (where[n] & 255); - } - } - - return result; -} - -/* 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. - - Note that fp constants aren't represent in the normal way on the ARM. - In big endian mode, things are as expected. However, in little endian - mode fp constants are big-endian word-wise, and little-endian byte-wise - within the words. For example, (double) 1.1 in big endian mode is - the byte sequence 3f f1 99 99 99 99 99 9a, and in little endian mode is - the byte sequence 99 99 f1 3f 9a 99 99 99. - - ??? The format of 12 byte floats is uncertain according to gcc's arm.h. */ - -char * -md_atof (type, litP, sizeP) - char type; - char * litP; - int * sizeP; -{ - int prec; - LITTLENUM_TYPE words[MAX_LITTLENUMS]; - char *t; - int i; - - switch (type) - { - case 'f': - case 'F': - case 's': - case 'S': - prec = 2; - break; - - case 'd': - case 'D': - case 'r': - case 'R': - prec = 4; - break; - - case 'x': - case 'X': - prec = 6; - break; - - case 'p': - case 'P': - prec = 6; - 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 * 2; - - if (target_big_endian) - { - for (i = 0; i < prec; i++) - { - md_number_to_chars (litP, (valueT) words[i], 2); - litP += 2; - } - } - else - { - /* For a 4 byte float the order of elements in `words' is 1 0. For an - 8 byte float the order is 1 0 3 2. */ - for (i = 0; i < prec; i += 2) - { - md_number_to_chars (litP, (valueT) words[i + 1], 2); - md_number_to_chars (litP + 2, (valueT) words[i], 2); - litP += 4; - } - } - - return 0; -} - -/* The knowledge of the PC's pipeline offset is built into the insns themselves. */ -long -md_pcrel_from (fixP) - fixS * fixP; -{ - if ( fixP->fx_addsy - && S_GET_SEGMENT (fixP->fx_addsy) == undefined_section - && fixP->fx_subsy == NULL) - return 0; - - if (fixP->fx_pcrel && (fixP->fx_r_type == BFD_RELOC_ARM_THUMB_ADD)) - { - /* PC relative addressing on the Thumb is slightly odd - as the bottom two bits of the PC are forced to zero - for the calculation. */ - return (fixP->fx_where + fixP->fx_frag->fr_address) & ~3; - } - - return fixP->fx_where + fixP->fx_frag->fr_address; -} - -/* Round up a section size to the appropriate boundary. */ -valueT -md_section_align (segment, size) - segT segment; - valueT size; -{ -#ifdef OBJ_ELF - return size; -#else - /* Round all sects to multiple of 4 */ - return (size + 3) & ~3; -#endif -} - -/* Under ELF we need to default _GLOBAL_OFFSET_TABLE. Otherwise - we have no need to default values of symbols. */ - -/* ARGSUSED */ -symbolS * -md_undefined_symbol (name) - char * name; -{ -#ifdef OBJ_ELF - if (name[0] == '_' && name[1] == 'G' - && streq (name, GLOBAL_OFFSET_TABLE_NAME)) - { - if (!GOT_symbol) - { - if (symbol_find (name)) - as_bad ("GOT already in the symbol table"); - - GOT_symbol = symbol_new (name, undefined_section, - (valueT)0, & zero_address_frag); - } - - return GOT_symbol; - } -#endif - - return 0; -} - -/* arm_reg_parse () := if it looks like a register, return its token and - advance the pointer. */ - -static int -arm_reg_parse (ccp) - register char ** ccp; -{ - char * start = * ccp; - char c; - char * p; - struct reg_entry * reg; - -#ifdef REGISTER_PREFIX - if (*start != REGISTER_PREFIX) - return FAIL; - p = start + 1; -#else - p = start; -#ifdef OPTIONAL_REGISTER_PREFIX - if (*p == OPTIONAL_REGISTER_PREFIX) - p++, start++; -#endif -#endif - if (!isalpha (*p) || !is_name_beginner (*p)) - return FAIL; - - c = *p++; - while (isalpha (c) || isdigit (c) || c == '_') - c = *p++; - - *--p = 0; - reg = (struct reg_entry *) hash_find (arm_reg_hsh, start); - *p = c; - - if (reg) - { - *ccp = p; - return reg->number; - } - - return FAIL; -} - -static int -arm_psr_parse (ccp) - register char ** ccp; -{ - char * start = * ccp; - char c; - char * p; - CONST struct asm_psr * psr; - - p = start; - c = *p++; - while (isalpha (c) || c == '_') - c = *p++; - - *--p = 0; - psr = (CONST struct asm_psr *) hash_find (arm_psr_hsh, start); - *p = c; - - if (psr) - { - *ccp = p; - return psr->number; - } - - return FAIL; -} - -int -md_apply_fix3 (fixP, val, seg) - fixS * fixP; - valueT * val; - segT seg; -{ - offsetT value = * val; - offsetT newval; - unsigned int newimm; - unsigned long temp; - int sign; - char * buf = fixP->fx_where + fixP->fx_frag->fr_literal; - arm_fix_data * arm_data = (arm_fix_data *) fixP->tc_fix_data; - - assert (fixP->fx_r_type < BFD_RELOC_UNUSED); - - /* Note whether this will delete the relocation. */ -#if 0 /* patch from REarnshaw to JDavis (disabled for the moment, since it doesn't work fully) */ - if ((fixP->fx_addsy == 0 || symbol_constant_p (fixP->fx_addsy)) - && !fixP->fx_pcrel) -#else - if (fixP->fx_addsy == 0 && !fixP->fx_pcrel) -#endif - fixP->fx_done = 1; - - /* If this symbol is in a different section then we need to leave it for - the linker to deal with. Unfortunately, md_pcrel_from can't tell, - so we have to undo it's effects here. */ - if (fixP->fx_pcrel) - { - if (fixP->fx_addsy != NULL - && S_IS_DEFINED (fixP->fx_addsy) - && S_GET_SEGMENT (fixP->fx_addsy) != seg) - { - if (target_oabi - && (fixP->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH - )) - value = 0; - else - value += md_pcrel_from (fixP); - } - } - - fixP->fx_addnumber = value; /* Remember value for emit_reloc. */ - - switch (fixP->fx_r_type) - { - case BFD_RELOC_ARM_IMMEDIATE: - newimm = validate_immediate (value); - temp = md_chars_to_number (buf, INSN_SIZE); - - /* If the instruction will fail, see if we can fix things up by - changing the opcode. */ - if (newimm == (unsigned int) FAIL - && (newimm = negate_data_op (&temp, value)) == (unsigned int) FAIL) - { - as_bad_where (fixP->fx_file, fixP->fx_line, - _("invalid constant (%lx) after fixup"), - (unsigned long) value); - break; - } - - newimm |= (temp & 0xfffff000); - md_number_to_chars (buf, (valueT) newimm, INSN_SIZE); - break; - - case BFD_RELOC_ARM_ADRL_IMMEDIATE: - { - unsigned int highpart = 0; - unsigned int newinsn = 0xe1a00000; /* nop */ - newimm = validate_immediate (value); - temp = md_chars_to_number (buf, INSN_SIZE); - - /* If the instruction will fail, see if we can fix things up by - changing the opcode. */ - if (newimm == (unsigned int) FAIL - && (newimm = negate_data_op (& temp, value)) == (unsigned int) FAIL) - { - /* No ? OK - try using two ADD instructions to generate the value. */ - newimm = validate_immediate_twopart (value, & highpart); - - /* Yes - then make sure that the second instruction is also an add. */ - if (newimm != (unsigned int) FAIL) - newinsn = temp; - /* Still No ? Try using a negated value. */ - else if (validate_immediate_twopart (- value, & highpart) != (unsigned int) FAIL) - temp = newinsn = (temp & OPCODE_MASK) | OPCODE_SUB << DATA_OP_SHIFT; - /* Otherwise - give up. */ - else - { - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Unable to compute ADRL instructions for PC offset of 0x%x"), value); - break; - } - - /* Replace the first operand in the 2nd instruction (which is the PC) - with the destination register. We have already added in the PC in the - first instruction and we do not want to do it again. */ - newinsn &= ~ 0xf0000; - newinsn |= ((newinsn & 0x0f000) << 4); - } - - newimm |= (temp & 0xfffff000); - md_number_to_chars (buf, (valueT) newimm, INSN_SIZE); - - highpart |= (newinsn & 0xfffff000); - md_number_to_chars (buf + INSN_SIZE, (valueT) highpart, INSN_SIZE); - } - break; - - case BFD_RELOC_ARM_OFFSET_IMM: - sign = value >= 0; - - if (value < 0) - value = - value; - - if (validate_offset_imm (value, 0) == FAIL) - { - as_bad_where (fixP->fx_file, fixP->fx_line, - _("bad immediate value for offset (%ld)"), (long) value); - break; - } - - newval = md_chars_to_number (buf, INSN_SIZE); - newval &= 0xff7ff000; - newval |= value | (sign ? INDEX_UP : 0); - md_number_to_chars (buf, newval, INSN_SIZE); - break; - - case BFD_RELOC_ARM_OFFSET_IMM8: - case BFD_RELOC_ARM_HWLITERAL: - sign = value >= 0; - - if (value < 0) - value = - value; - - if (validate_offset_imm (value, 1) == FAIL) - { - if (fixP->fx_r_type == BFD_RELOC_ARM_HWLITERAL) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("invalid literal constant: pool needs to be closer")); - else - as_bad (_("bad immediate value for half-word offset (%ld)"), - (long) value); - break; - } - - newval = md_chars_to_number (buf, INSN_SIZE); - newval &= 0xff7ff0f0; - newval |= ((value >> 4) << 8) | (value & 0xf) | (sign ? INDEX_UP : 0); - md_number_to_chars (buf, newval, INSN_SIZE); - break; - - case BFD_RELOC_ARM_LITERAL: - sign = value >= 0; - - if (value < 0) - value = - value; - - if (validate_offset_imm (value, 0) == FAIL) - { - as_bad_where (fixP->fx_file, fixP->fx_line, - _("invalid literal constant: pool needs to be closer")); - break; - } - - newval = md_chars_to_number (buf, INSN_SIZE); - newval &= 0xff7ff000; - newval |= value | (sign ? INDEX_UP : 0); - md_number_to_chars (buf, newval, INSN_SIZE); - break; - - case BFD_RELOC_ARM_SHIFT_IMM: - newval = md_chars_to_number (buf, INSN_SIZE); - if (((unsigned long) value) > 32 - || (value == 32 - && (((newval & 0x60) == 0) || (newval & 0x60) == 0x60))) - { - as_bad_where (fixP->fx_file, fixP->fx_line, - _("shift expression is too large")); - break; - } - - if (value == 0) - newval &= ~0x60; /* Shifts of zero must be done as lsl */ - else if (value == 32) - value = 0; - newval &= 0xfffff07f; - newval |= (value & 0x1f) << 7; - md_number_to_chars (buf, newval , INSN_SIZE); - break; - - case BFD_RELOC_ARM_SWI: - if (arm_data->thumb_mode) - { - if (((unsigned long) value) > 0xff) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid swi expression")); - newval = md_chars_to_number (buf, THUMB_SIZE) & 0xff00; - newval |= value; - md_number_to_chars (buf, newval, THUMB_SIZE); - } - else - { - if (((unsigned long) value) > 0x00ffffff) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid swi expression")); - newval = md_chars_to_number (buf, INSN_SIZE) & 0xff000000; - newval |= value; - md_number_to_chars (buf, newval , INSN_SIZE); - } - break; - - case BFD_RELOC_ARM_MULTI: - if (((unsigned long) value) > 0xffff) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid expression in load/store multiple")); - newval = value | md_chars_to_number (buf, INSN_SIZE); - md_number_to_chars (buf, newval, INSN_SIZE); - break; - - case BFD_RELOC_ARM_PCREL_BRANCH: - newval = md_chars_to_number (buf, INSN_SIZE); - -#ifdef OBJ_ELF - if (! target_oabi) - value = fixP->fx_offset; -#endif - value = (value >> 2) & 0x00ffffff; - value = (value + (newval & 0x00ffffff)) & 0x00ffffff; - newval = value | (newval & 0xff000000); - md_number_to_chars (buf, newval, INSN_SIZE); - break; - - - case BFD_RELOC_THUMB_PCREL_BRANCH9: /* conditional branch */ - newval = md_chars_to_number (buf, THUMB_SIZE); - { - addressT diff = (newval & 0xff) << 1; - if (diff & 0x100) - diff |= ~0xff; - - value += diff; - if ((value & ~0xff) && ((value & ~0xff) != ~0xff)) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Branch out of range")); - newval = (newval & 0xff00) | ((value & 0x1ff) >> 1); - } - md_number_to_chars (buf, newval, THUMB_SIZE); - break; - - case BFD_RELOC_THUMB_PCREL_BRANCH12: /* unconditional branch */ - newval = md_chars_to_number (buf, THUMB_SIZE); - { - addressT diff = (newval & 0x7ff) << 1; - if (diff & 0x800) - diff |= ~0x7ff; - - value += diff; - if ((value & ~0x7ff) && ((value & ~0x7ff) != ~0x7ff)) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Branch out of range")); - newval = (newval & 0xf800) | ((value & 0xfff) >> 1); - } - md_number_to_chars (buf, newval, THUMB_SIZE); - break; - - case BFD_RELOC_THUMB_PCREL_BRANCH23: - { - offsetT newval2; - addressT diff; - - newval = md_chars_to_number (buf, THUMB_SIZE); - newval2 = md_chars_to_number (buf + THUMB_SIZE, THUMB_SIZE); - diff = ((newval & 0x7ff) << 12) | ((newval2 & 0x7ff) << 1); - if (diff & 0x400000) - diff |= ~0x3fffff; -#ifdef OBJ_ELF - value = fixP->fx_offset; -#endif - value += diff; - if ((value & ~0x3fffff) && ((value & ~0x3fffff) != ~0x3fffff)) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Branch with link out of range")); - - newval = (newval & 0xf800) | ((value & 0x7fffff) >> 12); - newval2 = (newval2 & 0xf800) | ((value & 0xfff) >> 1); - md_number_to_chars (buf, newval, THUMB_SIZE); - md_number_to_chars (buf + THUMB_SIZE, newval2, THUMB_SIZE); - } - break; - - case BFD_RELOC_8: - if (fixP->fx_done || fixP->fx_pcrel) - md_number_to_chars (buf, value, 1); -#ifdef OBJ_ELF - else if (!target_oabi) - { - value = fixP->fx_offset; - md_number_to_chars (buf, value, 1); - } -#endif - break; - - case BFD_RELOC_16: - if (fixP->fx_done || fixP->fx_pcrel) - md_number_to_chars (buf, value, 2); -#ifdef OBJ_ELF - else if (!target_oabi) - { - value = fixP->fx_offset; - md_number_to_chars (buf, value, 2); - } -#endif - break; - -#ifdef OBJ_ELF - case BFD_RELOC_ARM_GOT32: - case BFD_RELOC_ARM_GOTOFF: - md_number_to_chars (buf, 0, 4); - break; -#endif - - case BFD_RELOC_RVA: - case BFD_RELOC_32: - if (fixP->fx_done || fixP->fx_pcrel) - md_number_to_chars (buf, value, 4); -#ifdef OBJ_ELF - else if (!target_oabi) - { - value = fixP->fx_offset; - md_number_to_chars (buf, value, 4); - } -#endif - break; - -#ifdef OBJ_ELF - case BFD_RELOC_ARM_PLT32: - /* It appears the instruction is fully prepared at this point. */ - break; -#endif - - case BFD_RELOC_ARM_GOTPC: - md_number_to_chars (buf, value, 4); - break; - - case BFD_RELOC_ARM_CP_OFF_IMM: - sign = value >= 0; - if (value < -1023 || value > 1023 || (value & 3)) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Illegal value for co-processor offset")); - if (value < 0) - value = -value; - newval = md_chars_to_number (buf, INSN_SIZE) & 0xff7fff00; - newval |= (value >> 2) | (sign ? INDEX_UP : 0); - md_number_to_chars (buf, newval , INSN_SIZE); - break; - - case BFD_RELOC_ARM_THUMB_OFFSET: - newval = md_chars_to_number (buf, THUMB_SIZE); - /* Exactly what ranges, and where the offset is inserted depends on - the type of instruction, we can establish this from the top 4 bits */ - switch (newval >> 12) - { - case 4: /* PC load */ - /* Thumb PC loads are somewhat odd, bit 1 of the PC is - forced to zero for these loads, so we will need to round - up the offset if the instruction address is not word - aligned (since the final address produced must be, and - we can only describe word-aligned immediate offsets). */ - - if ((fixP->fx_frag->fr_address + fixP->fx_where + value) & 3) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid offset, target not word aligned (0x%08X)"), - (unsigned int)(fixP->fx_frag->fr_address + fixP->fx_where + value)); - - if ((value + 2) & ~0x3fe) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid offset, value too big (0x%08X)"), value); - - /* Round up, since pc will be rounded down. */ - newval |= (value + 2) >> 2; - break; - - case 9: /* SP load/store */ - if (value & ~0x3fc) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid offset, value too big (0x%08X)"), value); - newval |= value >> 2; - break; - - case 6: /* Word load/store */ - if (value & ~0x7c) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid offset, value too big (0x%08X)"), value); - newval |= value << 4; /* 6 - 2 */ - break; - - case 7: /* Byte load/store */ - if (value & ~0x1f) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid offset, value too big (0x%08X)"), value); - newval |= value << 6; - break; - - case 8: /* Halfword load/store */ - if (value & ~0x3e) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid offset, value too big (0x%08X)"), value); - newval |= value << 5; /* 6 - 1 */ - break; - - default: - as_bad_where (fixP->fx_file, fixP->fx_line, - "Unable to process relocation for thumb opcode: %lx", - (unsigned long) newval); - break; - } - md_number_to_chars (buf, newval, THUMB_SIZE); - break; - - case BFD_RELOC_ARM_THUMB_ADD: - /* This is a complicated relocation, since we use it for all of - the following immediate relocations: - 3bit ADD/SUB - 8bit ADD/SUB - 9bit ADD/SUB SP word-aligned - 10bit ADD PC/SP word-aligned - - The type of instruction being processed is encoded in the - instruction field: - 0x8000 SUB - 0x00F0 Rd - 0x000F Rs - */ - newval = md_chars_to_number (buf, THUMB_SIZE); - { - int rd = (newval >> 4) & 0xf; - int rs = newval & 0xf; - int subtract = newval & 0x8000; - - if (rd == REG_SP) - { - if (value & ~0x1fc) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid immediate for stack address calculation")); - newval = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST; - newval |= value >> 2; - } - else if (rs == REG_PC || rs == REG_SP) - { - if (subtract || - value & ~0x3fc) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid immediate for address calculation (value = 0x%08lX)"), - (unsigned long) value); - newval = (rs == REG_PC ? T_OPCODE_ADD_PC : T_OPCODE_ADD_SP); - newval |= rd << 8; - newval |= value >> 2; - } - else if (rs == rd) - { - if (value & ~0xff) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid 8bit immediate")); - newval = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8; - newval |= (rd << 8) | value; - } - else - { - if (value & ~0x7) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid 3bit immediate")); - newval = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3; - newval |= rd | (rs << 3) | (value << 6); - } - } - md_number_to_chars (buf, newval , THUMB_SIZE); - break; - - case BFD_RELOC_ARM_THUMB_IMM: - newval = md_chars_to_number (buf, THUMB_SIZE); - switch (newval >> 11) - { - case 0x04: /* 8bit immediate MOV */ - case 0x05: /* 8bit immediate CMP */ - if (value < 0 || value > 255) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid immediate: %ld is too large"), - (long) value); - newval |= value; - break; - - default: - abort (); - } - md_number_to_chars (buf, newval , THUMB_SIZE); - break; - - case BFD_RELOC_ARM_THUMB_SHIFT: - /* 5bit shift value (0..31) */ - if (value < 0 || value > 31) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Illegal Thumb shift value: %ld"), (long) value); - newval = md_chars_to_number (buf, THUMB_SIZE) & 0xf03f; - newval |= value << 6; - md_number_to_chars (buf, newval , THUMB_SIZE); - break; - - case BFD_RELOC_VTABLE_INHERIT: - case BFD_RELOC_VTABLE_ENTRY: - fixP->fx_done = 0; - return 1; - - case BFD_RELOC_NONE: - default: - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Bad relocation fixup type (%d)"), fixP->fx_r_type); - } - - return 1; -} - -/* Translate internal representation of relocation info to BFD target - format. */ -arelent * -tc_gen_reloc (section, fixp) - asection * section; - fixS * fixp; -{ - arelent * reloc; - bfd_reloc_code_real_type code; - - 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; - - /* @@ Why fx_addnumber sometimes and fx_offset other times? */ -#ifndef OBJ_ELF - if (fixp->fx_pcrel == 0) - reloc->addend = fixp->fx_offset; - else - reloc->addend = fixp->fx_offset = reloc->address; -#else /* OBJ_ELF */ - reloc->addend = fixp->fx_offset; -#endif - - switch (fixp->fx_r_type) - { - case BFD_RELOC_8: - if (fixp->fx_pcrel) - { - code = BFD_RELOC_8_PCREL; - break; - } - - case BFD_RELOC_16: - if (fixp->fx_pcrel) - { - code = BFD_RELOC_16_PCREL; - break; - } - - case BFD_RELOC_32: - if (fixp->fx_pcrel) - { - code = BFD_RELOC_32_PCREL; - break; - } - - case BFD_RELOC_ARM_PCREL_BRANCH: - case BFD_RELOC_RVA: - case BFD_RELOC_THUMB_PCREL_BRANCH9: - case BFD_RELOC_THUMB_PCREL_BRANCH12: - case BFD_RELOC_THUMB_PCREL_BRANCH23: - case BFD_RELOC_VTABLE_ENTRY: - case BFD_RELOC_VTABLE_INHERIT: - code = fixp->fx_r_type; - break; - - case BFD_RELOC_ARM_LITERAL: - case BFD_RELOC_ARM_HWLITERAL: - /* If this is called then the a literal has been referenced across - a section boundary - possibly due to an implicit dump */ - as_bad_where (fixp->fx_file, fixp->fx_line, - _("Literal referenced across section boundary (Implicit dump?)")); - return NULL; - -#ifdef OBJ_ELF - case BFD_RELOC_ARM_GOT32: - case BFD_RELOC_ARM_GOTOFF: - case BFD_RELOC_ARM_PLT32: - code = fixp->fx_r_type; - break; -#endif - - case BFD_RELOC_ARM_IMMEDIATE: - as_bad_where (fixp->fx_file, fixp->fx_line, - _("Internal_relocation (type %d) not fixed up (IMMEDIATE)"), - fixp->fx_r_type); - return NULL; - - case BFD_RELOC_ARM_ADRL_IMMEDIATE: - as_bad_where (fixp->fx_file, fixp->fx_line, - _("ADRL used for a symbol not defined in the same file"), - fixp->fx_r_type); - return NULL; - - case BFD_RELOC_ARM_OFFSET_IMM: - as_bad_where (fixp->fx_file, fixp->fx_line, - _("Internal_relocation (type %d) not fixed up (OFFSET_IMM)"), - fixp->fx_r_type); - return NULL; - - default: - { - char * type; - switch (fixp->fx_r_type) - { - case BFD_RELOC_ARM_IMMEDIATE: type = "IMMEDIATE"; break; - case BFD_RELOC_ARM_OFFSET_IMM: type = "OFFSET_IMM"; break; - case BFD_RELOC_ARM_OFFSET_IMM8: type = "OFFSET_IMM8"; break; - case BFD_RELOC_ARM_SHIFT_IMM: type = "SHIFT_IMM"; break; - case BFD_RELOC_ARM_SWI: type = "SWI"; break; - case BFD_RELOC_ARM_MULTI: type = "MULTI"; break; - case BFD_RELOC_ARM_CP_OFF_IMM: type = "CP_OFF_IMM"; break; - case BFD_RELOC_ARM_THUMB_ADD: type = "THUMB_ADD"; break; - case BFD_RELOC_ARM_THUMB_SHIFT: type = "THUMB_SHIFT"; break; - case BFD_RELOC_ARM_THUMB_IMM: type = "THUMB_IMM"; break; - case BFD_RELOC_ARM_THUMB_OFFSET: type = "THUMB_OFFSET"; break; - default: type = _("<unknown>"); break; - } - as_bad_where (fixp->fx_file, fixp->fx_line, - _("Can not represent %s relocation in this object file format (%d)"), - type, fixp->fx_pcrel); - return NULL; - } - } - -#ifdef OBJ_ELF - if (code == BFD_RELOC_32_PCREL - && GOT_symbol - && fixp->fx_addsy == GOT_symbol) - { - code = BFD_RELOC_ARM_GOTPC; - reloc->addend = fixp->fx_offset = reloc->address; - } -#endif - - reloc->howto = bfd_reloc_type_lookup (stdoutput, code); - - if (reloc->howto == NULL) - { - as_bad_where (fixp->fx_file, fixp->fx_line, - _("Can not represent %s relocation in this object file format"), - bfd_get_reloc_code_name (code)); - return NULL; - } - - /* HACK: Since arm ELF uses Rel instead of Rela, encode the - vtable entry to be used in the relocation's section offset. */ - if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) - reloc->address = fixp->fx_offset; - - return reloc; -} - -int -md_estimate_size_before_relax (fragP, segtype) - fragS * fragP; - segT segtype; -{ - as_fatal (_("md_estimate_size_before_relax\n")); - return 1; -} - -static void -output_inst PARAMS ((void)) -{ - char * to = NULL; - - if (inst.error) - { - as_bad (inst.error); - return; - } - - to = frag_more (inst.size); - - if (thumb_mode && (inst.size > THUMB_SIZE)) - { - assert (inst.size == (2 * THUMB_SIZE)); - md_number_to_chars (to, inst.instruction >> 16, THUMB_SIZE); - md_number_to_chars (to + THUMB_SIZE, inst.instruction, THUMB_SIZE); - } - else if (inst.size > INSN_SIZE) - { - assert (inst.size == (2 * INSN_SIZE)); - md_number_to_chars (to, inst.instruction, INSN_SIZE); - md_number_to_chars (to + INSN_SIZE, inst.instruction, INSN_SIZE); - } - else - md_number_to_chars (to, inst.instruction, inst.size); - - if (inst.reloc.type != BFD_RELOC_NONE) - fix_new_arm (frag_now, to - frag_now->fr_literal, - inst.size, & inst.reloc.exp, inst.reloc.pc_rel, - inst.reloc.type); - - return; -} - -void -md_assemble (str) - char * str; -{ - char c; - char * p; - char * q; - char * start; - - /* Align the instruction. - This may not be the right thing to do but ... */ - /* arm_align (2, 0); */ - listing_prev_line (); /* Defined in listing.h */ - - /* Align the previous label if needed. */ - if (last_label_seen != NULL) - { - symbol_set_frag (last_label_seen, frag_now); - S_SET_VALUE (last_label_seen, (valueT) frag_now_fix ()); - S_SET_SEGMENT (last_label_seen, now_seg); - } - - memset (&inst, '\0', sizeof (inst)); - inst.reloc.type = BFD_RELOC_NONE; - - skip_whitespace (str); - - /* Scan up to the end of the op-code, which must end in white space or - end of string. */ - for (start = p = str; *p != '\0'; p++) - if (*p == ' ') - break; - - if (p == str) - { - as_bad (_("No operator -- statement `%s'\n"), str); - return; - } - - if (thumb_mode) - { - CONST struct thumb_opcode * opcode; - - c = *p; - *p = '\0'; - opcode = (CONST struct thumb_opcode *) hash_find (arm_tops_hsh, str); - *p = c; - - if (opcode) - { - /* Check that this instruction is supported for this CPU. */ - if (thumb_mode == 1 && (opcode->variants & cpu_variant) == 0) - { - as_bad (_("selected processor does not support this opcode")); - return; - } - - inst.instruction = opcode->value; - inst.size = opcode->size; - (*opcode->parms)(p); - output_inst (); - return; - } - } - else - { - CONST struct asm_opcode * opcode; - unsigned long cond_code; - - inst.size = INSN_SIZE; - /* p now points to the end of the opcode, probably white space, but we - have to break the opcode up in case it contains condionals and flags; - keep trying with progressively smaller basic instructions until one - matches, or we run out of opcode. */ - q = (p - str > LONGEST_INST) ? str + LONGEST_INST : p; - for (; q != str; q--) - { - c = *q; - *q = '\0'; - opcode = (CONST struct asm_opcode *) hash_find (arm_ops_hsh, str); - *q = c; - - if (opcode && opcode->template) - { - unsigned long flag_bits = 0; - char * r; - - /* Check that this instruction is supported for this CPU. */ - if ((opcode->variants & cpu_variant) == 0) - goto try_shorter; - - inst.instruction = opcode->value; - if (q == p) /* Just a simple opcode. */ - { - if (opcode->comp_suffix) - { - if (*opcode->comp_suffix != '\0') - as_bad (_("Opcode `%s' must have suffix from list: <%s>"), - str, opcode->comp_suffix); - else - /* Not a conditional instruction. */ - (*opcode->parms)(q, 0); - } - else - { - /* A conditional instruction with default condition. */ - inst.instruction |= COND_ALWAYS; - (*opcode->parms)(q, 0); - } - output_inst (); - return; - } - - /* Not just a simple opcode. Check if extra is a conditional. */ - r = q; - if (p - r >= 2) - { - CONST struct asm_cond *cond; - char d = *(r + 2); - - *(r + 2) = '\0'; - cond = (CONST struct asm_cond *) hash_find (arm_cond_hsh, r); - *(r + 2) = d; - if (cond) - { - if (cond->value == 0xf0000000) - as_tsktsk ( -_("Warning: Use of the 'nv' conditional is deprecated\n")); - - cond_code = cond->value; - r += 2; - } - else - cond_code = COND_ALWAYS; - } - else - cond_code = COND_ALWAYS; - - /* Apply the conditional, or complain it's not allowed. */ - if (opcode->comp_suffix && *opcode->comp_suffix == '\0') - { - /* Instruction isn't conditional */ - if (cond_code != COND_ALWAYS) - { - as_bad (_("Opcode `%s' is unconditional\n"), str); - return; - } - } - else - /* Instruction is conditional: set the condition into it. */ - inst.instruction |= cond_code; - - - /* If there is a compulsory suffix, it should come here, before - any optional flags. */ - if (opcode->comp_suffix && *opcode->comp_suffix != '\0') - { - CONST char *s = opcode->comp_suffix; - - while (*s) - { - inst.suffix++; - if (*r == *s) - break; - s++; - } - - if (*s == '\0') - { - as_bad (_("Opcode `%s' must have suffix from <%s>\n"), str, - opcode->comp_suffix); - return; - } - - r++; - } - - /* The remainder, if any should now be flags for the instruction; - Scan these checking each one found with the opcode. */ - if (r != p) - { - char d; - CONST struct asm_flg *flag = opcode->flags; - - if (flag) - { - int flagno; - - d = *p; - *p = '\0'; - - for (flagno = 0; flag[flagno].template; flagno++) - { - if (streq (r, flag[flagno].template)) - { - flag_bits |= flag[flagno].set_bits; - break; - } - } - - *p = d; - if (! flag[flagno].template) - goto try_shorter; - } - else - goto try_shorter; - } - - (*opcode->parms) (p, flag_bits); - output_inst (); - return; - } - - try_shorter: - ; - } - } - - /* It wasn't an instruction, but it might be a register alias of the form - alias .req reg */ - q = p; - skip_whitespace (q); - - c = *p; - *p = '\0'; - - if (*q && !strncmp (q, ".req ", 4)) - { - int reg; - char * copy_of_str = str; - char * r; - - q += 4; - skip_whitespace (q); - - for (r = q; *r != '\0'; r++) - if (*r == ' ') - break; - - if (r != q) - { - int regnum; - char d = *r; - - *r = '\0'; - regnum = arm_reg_parse (& q); - *r = d; - - reg = arm_reg_parse (& str); - - if (reg == FAIL) - { - if (regnum != FAIL) - insert_reg_alias (str, regnum); - else - as_warn (_("register '%s' does not exist\n"), q); - } - else if (regnum != FAIL) - { - if (reg != regnum) - as_warn (_("ignoring redefinition of register alias '%s'"), copy_of_str ); - - /* Do not warn about redefinitions to the same alias. */ - } - else - as_warn (_("ignoring redefinition of register alias '%s' to non-existant register '%s'"), - copy_of_str, q); - } - else - as_warn (_("ignoring incomplete .req pseuso op")); - - *p = c; - return; - } - - *p = c; - as_bad (_("bad instruction `%s'"), start); -} - -/* - * md_parse_option - * Invocation line includes a switch not recognized by the base assembler. - * See if it's a processor-specific option. These are: - * Cpu variants, the arm part is optional: - * -m[arm]1 Currently not supported. - * -m[arm]2, -m[arm]250 Arm 2 and Arm 250 processor - * -m[arm]3 Arm 3 processor - * -m[arm]6[xx], Arm 6 processors - * -m[arm]7[xx][t][[d]m] Arm 7 processors - * -m[arm]8[10] Arm 8 processors - * -m[arm]9[20][tdmi] Arm 9 processors - * -mstrongarm[110[0]] StrongARM processors - * -m[arm]v[2345] Arm architectures - * -mall All (except the ARM1) - * FP variants: - * -mfpa10, -mfpa11 FPA10 and 11 co-processor instructions - * -mfpe-old (No float load/store multiples) - * -mno-fpu Disable all floating point instructions - * Run-time endian selection: - * -EB big endian cpu - * -EL little endian cpu - * ARM Procedure Calling Standard: - * -mapcs-32 32 bit APCS - * -mapcs-26 26 bit APCS - * -mapcs-float Pass floats in float regs - * -mapcs-reentrant Position independent code - * -mthumb-interwork Code supports Arm/Thumb interworking - * -moabi Old ELF ABI - */ - -CONST char * md_shortopts = "m:k"; -struct option md_longopts[] = -{ -#ifdef ARM_BI_ENDIAN -#define OPTION_EB (OPTION_MD_BASE + 0) - {"EB", no_argument, NULL, OPTION_EB}, -#define OPTION_EL (OPTION_MD_BASE + 1) - {"EL", no_argument, NULL, OPTION_EL}, -#ifdef OBJ_ELF -#define OPTION_OABI (OPTION_MD_BASE +2) - {"oabi", no_argument, NULL, OPTION_OABI}, -#endif -#endif - {NULL, no_argument, NULL, 0} -}; -size_t md_longopts_size = sizeof (md_longopts); - -int -md_parse_option (c, arg) - int c; - char * arg; -{ - char * str = arg; - - switch (c) - { -#ifdef ARM_BI_ENDIAN - case OPTION_EB: - target_big_endian = 1; - break; - case OPTION_EL: - target_big_endian = 0; - break; -#endif - - case 'm': - switch (*str) - { - case 'f': - if (streq (str, "fpa10")) - cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA10; - else if (streq (str, "fpa11")) - cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA11; - else if (streq (str, "fpe-old")) - cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_CORE; - else - goto bad; - break; - - case 'n': - if (streq (str, "no-fpu")) - cpu_variant &= ~FPU_ALL; - break; - -#ifdef OBJ_ELF - case 'o': - if (streq (str, "oabi")) - target_oabi = true; - break; -#endif - - case 't': - /* Limit assembler to generating only Thumb instructions: */ - if (streq (str, "thumb")) - { - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_THUMB; - cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_NONE; - thumb_mode = 1; - } - else if (streq (str, "thumb-interwork")) - { - if ((cpu_variant & ARM_THUMB) == 0) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCH_V4T; -#if defined OBJ_COFF || defined OBJ_ELF - support_interwork = true; -#endif - } - else - goto bad; - break; - - default: - if (streq (str, "all")) - { - cpu_variant = ARM_ALL | FPU_ALL; - return 1; - } -#if defined OBJ_COFF || defined OBJ_ELF - if (! strncmp (str, "apcs-", 5)) - { - /* GCC passes on all command line options starting "-mapcs-..." - to us, so we must parse them here. */ - - str += 5; - - if (streq (str, "32")) - { - uses_apcs_26 = false; - return 1; - } - else if (streq (str, "26")) - { - uses_apcs_26 = true; - return 1; - } - else if (streq (str, "frame")) - { - /* Stack frames are being generated - does not affect - linkage of code. */ - return 1; - } - else if (streq (str, "stack-check")) - { - /* Stack checking is being performed - does not affect - linkage, but does require that the functions - __rt_stkovf_split_small and __rt_stkovf_split_big be - present in the final link. */ - - return 1; - } - else if (streq (str, "float")) - { - /* Floating point arguments are being passed in the floating - point registers. This does affect linking, since this - version of the APCS is incompatible with the version that - passes floating points in the integer registers. */ - - uses_apcs_float = true; - return 1; - } - else if (streq (str, "reentrant")) - { - /* Reentrant code has been generated. This does affect - linking, since there is no point in linking reentrant/ - position independent code with absolute position code. */ - pic_code = true; - return 1; - } - - as_bad (_("Unrecognised APCS switch -m%s"), arg); - return 0; - } -#endif - /* Strip off optional "arm" */ - if (! strncmp (str, "arm", 3)) - str += 3; - - switch (*str) - { - case '1': - if (streq (str, "1")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_1; - else - goto bad; - break; - - case '2': - if (streq (str, "2")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2; - else if (streq (str, "250")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_250; - else - goto bad; - break; - - case '3': - if (streq (str, "3")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3; - else - goto bad; - break; - - case '6': - switch (strtol (str, NULL, 10)) - { - case 6: - case 60: - case 600: - case 610: - case 620: - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_6; - break; - default: - goto bad; - } - break; - - case '7': - switch (strtol (str, & str, 10)) /* Eat the processor name */ - { - case 7: - case 70: - case 700: - case 710: - case 720: - case 7100: - case 7500: - break; - default: - goto bad; - } - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7; - for (; *str; str++) - { - switch (* str) - { - case 't': - cpu_variant |= (ARM_THUMB | ARM_ARCH_V4); - break; - - case 'm': - cpu_variant |= ARM_LONGMUL; - break; - - case 'f': /* fe => fp enabled cpu. */ - if (str[1] == 'e') - ++ str; - else - goto bad; - - case 'c': /* Left over from 710c processor name. */ - case 'd': /* Debug */ - case 'i': /* Embedded ICE */ - /* Included for completeness in ARM processor naming. */ - break; - - default: - goto bad; - } - } - break; - - case '8': - if (streq (str, "8") || streq (str, "810")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_8 | ARM_ARCH_V4 | ARM_LONGMUL; - else - goto bad; - break; - - case '9': - if (streq (str, "9")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL | ARM_THUMB; - else if (streq (str, "920")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL; - else if (streq (str, "920t")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL | ARM_THUMB; - else if (streq (str, "9tdmi")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL | ARM_THUMB; - else - goto bad; - break; - - - case 's': - if (streq (str, "strongarm") - || streq (str, "strongarm110") - || streq (str, "strongarm1100")) - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_8 | ARM_ARCH_V4 | ARM_LONGMUL; - else - goto bad; - break; - - case 'v': - /* Select variant based on architecture rather than processor */ - switch (*++str) - { - case '2': - switch (*++str) - { - case 'a': cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3; break; - case 0: cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2; break; - default: as_bad (_("Invalid architecture variant -m%s"), arg); break; - } - break; - - case '3': - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7; - - switch (*++str) - { - case 'm': cpu_variant |= ARM_LONGMUL; break; - case 0: break; - default: as_bad (_("Invalid architecture variant -m%s"), arg); break; - } - break; - - case '4': - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCH_V4; - - switch (*++str) - { - case 't': cpu_variant |= ARM_THUMB; break; - case 0: break; - default: as_bad (_("Invalid architecture variant -m%s"), arg); break; - } - break; - - case '5': - cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCH_V5; - switch (*++str) - { - case 't': cpu_variant |= ARM_THUMB; break; - case 'e': cpu_variant |= ARM_EXT_V5E; break; - case 0: break; - default: as_bad (_("Invalid architecture variant -m%s"), arg); break; - } - break; - - default: - as_bad (_("Invalid architecture variant -m%s"), arg); - break; - } - break; - - default: - bad: - as_bad (_("Invalid processor variant -m%s"), arg); - return 0; - } - } - break; - -#if defined OBJ_ELF || defined OBJ_COFF - case 'k': - pic_code = 1; - break; -#endif - - default: - return 0; - } - - return 1; -} - -void -md_show_usage (fp) - FILE * fp; -{ - fprintf (fp, -_("\ - ARM Specific Assembler Options:\n\ - -m[arm][<processor name>] select processor variant\n\ - -m[arm]v[2|2a|3|3m|4|4t|5[t][e]] select architecture variant\n\ - -mthumb only allow Thumb instructions\n\ - -mthumb-interwork mark the assembled code as supporting interworking\n\ - -mall allow any instruction\n\ - -mfpa10, -mfpa11 select floating point architecture\n\ - -mfpe-old don't allow floating-point multiple instructions\n\ - -mno-fpu don't allow any floating-point instructions.\n")); - fprintf (fp, -_("\ - -k generate PIC code.\n")); -#if defined OBJ_COFF || defined OBJ_ELF - fprintf (fp, -_("\ - -mapcs-32, -mapcs-26 specify which ARM Procedure Calling Standard to use\n")); - fprintf (fp, -_("\ - -mapcs-float floating point args are passed in FP regs\n")); - fprintf (fp, -_("\ - -mapcs-reentrant the code is position independent/reentrant\n")); - #endif -#ifdef OBJ_ELF - fprintf (fp, -_("\ - -moabi support the old ELF ABI\n")); -#endif -#ifdef ARM_BI_ENDIAN - fprintf (fp, -_("\ - -EB assemble code for a big endian cpu\n\ - -EL assemble code for a little endian cpu\n")); -#endif -} - -/* We need to be able to fix up arbitrary expressions in some statements. - This is so that we can handle symbols that are an arbitrary distance from - the pc. The most common cases are of the form ((+/-sym -/+ . - 8) & mask), - which returns part of an address in a form which will be valid for - a data instruction. We do this by pushing the expression into a symbol - in the expr_section, and creating a fix for that. */ - -static void -fix_new_arm (frag, where, size, exp, pc_rel, reloc) - fragS * frag; - int where; - short int size; - expressionS * exp; - int pc_rel; - int reloc; -{ - fixS * new_fix; - arm_fix_data * arm_data; - - switch (exp->X_op) - { - case O_constant: - case O_symbol: - case O_add: - case O_subtract: - new_fix = fix_new_exp (frag, where, size, exp, pc_rel, reloc); - break; - - default: - new_fix = fix_new (frag, where, size, make_expr_symbol (exp), 0, - pc_rel, reloc); - break; - } - - /* Mark whether the fix is to a THUMB instruction, or an ARM instruction */ - arm_data = (arm_fix_data *) obstack_alloc (& notes, sizeof (arm_fix_data)); - new_fix->tc_fix_data = (PTR) arm_data; - arm_data->thumb_mode = thumb_mode; - - return; -} - - -/* This fix_new is called by cons via TC_CONS_FIX_NEW. */ -void -cons_fix_new_arm (frag, where, size, exp) - fragS * frag; - int where; - int size; - expressionS * exp; -{ - bfd_reloc_code_real_type type; - int pcrel = 0; - - /* Pick a reloc ... - * - * @@ Should look at CPU word size. - */ - switch (size) - { - case 2: - type = BFD_RELOC_16; - break; - case 4: - default: - type = BFD_RELOC_32; - break; - case 8: - type = BFD_RELOC_64; - break; - } - - fix_new_exp (frag, where, (int) size, exp, pcrel, type); -} - -/* A good place to do this, although this was probably not intended - for this kind of use. We need to dump the literal pool before - references are made to a null symbol pointer. */ -void -arm_cleanup () -{ - if (current_poolP == NULL) - return; - - subseg_set (text_section, 0); /* Put it at the end of text section. */ - s_ltorg (0); - listing_prev_line (); -} - -void -arm_start_line_hook () -{ - last_label_seen = NULL; -} - -void -arm_frob_label (sym) - symbolS * sym; -{ - last_label_seen = sym; - - ARM_SET_THUMB (sym, thumb_mode); - -#if defined OBJ_COFF || defined OBJ_ELF - ARM_SET_INTERWORK (sym, support_interwork); -#endif - - if (label_is_thumb_function_name) - { - /* When the address of a Thumb function is taken the bottom - bit of that address should be set. This will allow - interworking between Arm and Thumb functions to work - correctly. */ - - THUMB_SET_FUNC (sym, 1); - - label_is_thumb_function_name = false; - } -} - -/* Adjust the symbol table. This marks Thumb symbols as distinct from - ARM ones. */ - -void -arm_adjust_symtab () -{ -#ifdef OBJ_COFF - symbolS * sym; - - for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) - { - if (ARM_IS_THUMB (sym)) - { - if (THUMB_IS_FUNC (sym)) - { - /* Mark the symbol as a Thumb function. */ - if ( S_GET_STORAGE_CLASS (sym) == C_STAT - || S_GET_STORAGE_CLASS (sym) == C_LABEL) /* This can happen! */ - S_SET_STORAGE_CLASS (sym, C_THUMBSTATFUNC); - - else if (S_GET_STORAGE_CLASS (sym) == C_EXT) - S_SET_STORAGE_CLASS (sym, C_THUMBEXTFUNC); - else - as_bad (_("%s: unexpected function type: %d"), - S_GET_NAME (sym), S_GET_STORAGE_CLASS (sym)); - } - else switch (S_GET_STORAGE_CLASS (sym)) - { - case C_EXT: - S_SET_STORAGE_CLASS (sym, C_THUMBEXT); - break; - case C_STAT: - S_SET_STORAGE_CLASS (sym, C_THUMBSTAT); - break; - case C_LABEL: - S_SET_STORAGE_CLASS (sym, C_THUMBLABEL); - break; - default: /* do nothing */ - break; - } - } - - if (ARM_IS_INTERWORK (sym)) - coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_flags = 0xFF; - } -#endif -#ifdef OBJ_ELF - symbolS * sym; - elf_symbol_type * elf_sym; - char bind; - - for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) - { - if (ARM_IS_THUMB (sym)) - { - if (THUMB_IS_FUNC (sym)) - { - elf_sym = elf_symbol (symbol_get_bfdsym (sym)); - bind = ELF_ST_BIND (elf_sym); - elf_sym->internal_elf_sym.st_info = ELF_ST_INFO (bind, STT_ARM_TFUNC); - } - } - } -#endif -} - -int -arm_data_in_code () -{ - if (thumb_mode && ! strncmp (input_line_pointer + 1, "data:", 5)) - { - *input_line_pointer = '/'; - input_line_pointer += 5; - *input_line_pointer = 0; - return 1; - } - - return 0; -} - -char * -arm_canonicalize_symbol_name (name) - char * name; -{ - int len; - - if (thumb_mode && (len = strlen (name)) > 5 - && streq (name + len - 5, "/data")) - *(name + len - 5) = 0; - - return name; -} - -boolean -arm_validate_fix (fixP) - fixS * fixP; -{ - /* If the destination of the branch is a defined symbol which does not have - the THUMB_FUNC attribute, then we must be calling a function which has - the (interfacearm) attribute. We look for the Thumb entry point to that - function and change the branch to refer to that function instead. */ - if ( fixP->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23 - && fixP->fx_addsy != NULL - && S_IS_DEFINED (fixP->fx_addsy) - && ! THUMB_IS_FUNC (fixP->fx_addsy)) - { - fixP->fx_addsy = find_real_start (fixP->fx_addsy); - return true; - } - - return false; -} - -#ifdef OBJ_ELF -/* Relocations against Thumb function names must be left unadjusted, - so that the linker can use this information to correctly set the - bottom bit of their addresses. The MIPS version of this function - also prevents relocations that are mips-16 specific, but I do not - know why it does this. - - FIXME: - There is one other problem that ought to be addressed here, but - which currently is not: Taking the address of a label (rather - than a function) and then later jumping to that address. Such - addresses also ought to have their bottom bit set (assuming that - they reside in Thumb code), but at the moment they will not. */ - -boolean -arm_fix_adjustable (fixP) - fixS * fixP; -{ - if (fixP->fx_addsy == NULL) - return 1; - - /* Prevent all adjustments to global symbols. */ - if (S_IS_EXTERN (fixP->fx_addsy)) - return 0; - - if (S_IS_WEAK (fixP->fx_addsy)) - return 0; - - if (THUMB_IS_FUNC (fixP->fx_addsy) - && fixP->fx_subsy == NULL) - return 0; - - /* We need the symbol name for the VTABLE entries */ - if ( fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT - || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) - return 0; - - return 1; -} - -const char * -elf32_arm_target_format () -{ - if (target_big_endian) - if (target_oabi) - return "elf32-bigarm-oabi"; - else - return "elf32-bigarm"; - else - if (target_oabi) - return "elf32-littlearm-oabi"; - else - return "elf32-littlearm"; -} - -void -armelf_frob_symbol (symp, puntp) - symbolS * symp; - int * puntp; -{ - elf_frob_symbol (symp, puntp); -} - -int -arm_force_relocation (fixp) - struct fix * fixp; -{ - if ( fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT - || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY - || fixp->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH - || fixp->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23) - return 1; - - return 0; -} - -static bfd_reloc_code_real_type -arm_parse_reloc () -{ - char id[16]; - char * ip; - int i; - static struct - { - char * str; - int len; - bfd_reloc_code_real_type reloc; - } - reloc_map[] = - { -#define MAP(str,reloc) { str, sizeof (str)-1, reloc } - MAP ("(got)", BFD_RELOC_ARM_GOT32), - MAP ("(gotoff)", BFD_RELOC_ARM_GOTOFF), - /* ScottB: Jan 30, 1998 */ - /* Added support for parsing "var(PLT)" branch instructions */ - /* generated by GCC for PLT relocs */ - MAP ("(plt)", BFD_RELOC_ARM_PLT32), - { NULL, 0, BFD_RELOC_UNUSED } -#undef MAP - }; - - for (i = 0, ip = input_line_pointer; - i < sizeof (id) && (isalnum (*ip) || ispunct (*ip)); - i++, ip++) - id[i] = tolower (*ip); - - for (i = 0; reloc_map[i].str; i++) - if (strncmp (id, reloc_map[i].str, reloc_map[i].len) == 0) - break; - - input_line_pointer += reloc_map[i].len; - - return reloc_map[i].reloc; -} - -static void -s_arm_elf_cons (nbytes) - int nbytes; -{ - expressionS exp; - -#ifdef md_flush_pending_output - md_flush_pending_output (); -#endif - - if (is_it_end_of_statement ()) - { - demand_empty_rest_of_line (); - return; - } - -#ifdef md_cons_align - md_cons_align (nbytes); -#endif - - do - { - bfd_reloc_code_real_type reloc; - - expression (& exp); - - if (exp.X_op == O_symbol - && * input_line_pointer == '(' - && (reloc = arm_parse_reloc()) != BFD_RELOC_UNUSED) - { - reloc_howto_type * howto = bfd_reloc_type_lookup (stdoutput, reloc); - int size = bfd_get_reloc_size (howto); - - if (size > nbytes) - as_bad ("%s relocations do not fit in %d bytes", howto->name, nbytes); - else - { - register char * p = frag_more ((int) nbytes); - int offset = nbytes - size; - - fix_new_exp (frag_now, p - frag_now->fr_literal + offset, size, - & exp, 0, reloc); - } - } - else - emit_expr (& exp, (unsigned int) nbytes); - } - while (*input_line_pointer++ == ','); - - input_line_pointer--; /* Put terminator back into stream. */ - demand_empty_rest_of_line (); -} - -#endif /* OBJ_ELF */ |