diff options
Diffstat (limited to 'binutils-2.17/gas/config/tc-cris.c')
-rw-r--r-- | binutils-2.17/gas/config/tc-cris.c | 4320 |
1 files changed, 0 insertions, 4320 deletions
diff --git a/binutils-2.17/gas/config/tc-cris.c b/binutils-2.17/gas/config/tc-cris.c deleted file mode 100644 index 1c8e6dc6..00000000 --- a/binutils-2.17/gas/config/tc-cris.c +++ /dev/null @@ -1,4320 +0,0 @@ -/* tc-cris.c -- Assembler code for the CRIS CPU core. - Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. - - Contributed by Axis Communications AB, Lund, Sweden. - Originally written for GAS 1.38.1 by Mikael Asker. - Updates, BFDizing, GNUifying and ELF support by Hans-Peter Nilsson. - - 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, 51 Franklin Street - Fifth Floor, Boston, - MA 02110-1301, USA. */ - -#include <stdio.h> -#include "as.h" -#include "safe-ctype.h" -#include "subsegs.h" -#include "opcode/cris.h" -#include "dwarf2dbg.h" - -/* Conventions used here: - Generally speaking, pointers to binutils types such as "fragS" and - "expressionS" get parameter and variable names ending in "P", such as - "fragP", to harmonize with the rest of the binutils code. Other - pointers get a "p" suffix, such as "bufp". Any function or type-name - that could clash with a current or future binutils or GAS function get - a "cris_" prefix. */ - -#define SYNTAX_RELAX_REG_PREFIX "no_register_prefix" -#define SYNTAX_ENFORCE_REG_PREFIX "register_prefix" -#define SYNTAX_USER_SYM_LEADING_UNDERSCORE "leading_underscore" -#define SYNTAX_USER_SYM_NO_LEADING_UNDERSCORE "no_leading_underscore" -#define REGISTER_PREFIX_CHAR '$' - -/* True for expressions where getting X_add_symbol and X_add_number is - enough to get the "base" and "offset"; no need to make_expr_symbol. - It's not enough to check if X_op_symbol is NULL; that misses unary - operations like O_uminus. */ -#define SIMPLE_EXPR(EXP) \ - ((EXP)->X_op == O_constant || (EXP)->X_op == O_symbol) - -/* Like in ":GOT", ":GOTOFF" etc. Other ports use '@', but that's in - line_separator_chars for CRIS, so we avoid it. */ -#define PIC_SUFFIX_CHAR ':' - -/* This might be CRIS_INSN_NONE if we're assembling a prefix-insn only. - Note that some prefix-insns might be assembled as CRIS_INSN_NORMAL. */ -enum cris_insn_kind -{ - CRIS_INSN_NORMAL, CRIS_INSN_NONE, CRIS_INSN_BRANCH, CRIS_INSN_MUL -}; - -/* An instruction will have one of these prefixes. - Although the same bit-pattern, we handle BDAP with an immediate - expression (eventually quick or [pc+]) different from when we only have - register expressions. */ -enum prefix_kind -{ - PREFIX_NONE, PREFIX_BDAP_IMM, PREFIX_BDAP, PREFIX_BIAP, PREFIX_DIP, - PREFIX_PUSH -}; - -/* The prefix for an instruction. */ -struct cris_prefix -{ - enum prefix_kind kind; - int base_reg_number; - unsigned int opcode; - - /* There might be an expression to be evaluated, like I in [rN+I]. */ - expressionS expr; - - /* If there's an expression, we might need a relocation. Here's the - type of what relocation to start relaxaton with. - The relocation is assumed to start immediately after the prefix insn, - so we don't provide an offset. */ - enum bfd_reloc_code_real reloc; -}; - -/* The description of the instruction being assembled. */ -struct cris_instruction -{ - /* If CRIS_INSN_NONE, then this insn is of zero length. */ - enum cris_insn_kind insn_type; - - /* If a special register was mentioned, this is its description, else - it is NULL. */ - const struct cris_spec_reg *spec_reg; - - unsigned int opcode; - - /* An insn may have at most one expression; theoretically there could be - another in its prefix (but I don't see how that could happen). */ - expressionS expr; - - /* The expression might need a relocation. Here's one to start - relaxation with. */ - enum bfd_reloc_code_real reloc; - - /* The size in bytes of an immediate expression, or zero if - nonapplicable. */ - int imm_oprnd_size; -}; - -enum cris_archs -{ - arch_cris_unknown, - arch_crisv0, arch_crisv3, arch_crisv8, arch_crisv10, - arch_cris_any_v0_v10, arch_crisv32, arch_cris_common_v10_v32 -}; - -static enum cris_archs cris_arch_from_string (char **); -static int cris_insn_ver_valid_for_arch (enum cris_insn_version_usage, - enum cris_archs); - -static void cris_process_instruction (char *, struct cris_instruction *, - struct cris_prefix *); -static int get_bwd_size_modifier (char **, int *); -static int get_bw_size_modifier (char **, int *); -static int get_gen_reg (char **, int *); -static int get_spec_reg (char **, const struct cris_spec_reg **); -static int get_sup_reg (char **, int *); -static int get_autoinc_prefix_or_indir_op (char **, struct cris_prefix *, - int *, int *, int *, - expressionS *); -static int get_3op_or_dip_prefix_op (char **, struct cris_prefix *); -static int cris_get_expression (char **, expressionS *); -static int get_flags (char **, int *); -static void gen_bdap (int, expressionS *); -static int branch_disp (int); -static void gen_cond_branch_32 (char *, char *, fragS *, symbolS *, symbolS *, - long int); -static void cris_number_to_imm (char *, long, int, fixS *, segT); -static void cris_create_short_jump (char *, addressT, addressT, fragS *, - symbolS *); -static void s_syntax (int); -static void s_cris_file (int); -static void s_cris_loc (int); -static void s_cris_arch (int); - -/* Get ":GOT", ":GOTOFF", ":PLT" etc. suffixes. */ -static void cris_get_pic_suffix (char **, bfd_reloc_code_real_type *, - expressionS *); -static unsigned int cris_get_pic_reloc_size (bfd_reloc_code_real_type); - -/* All the .syntax functions. */ -static void cris_force_reg_prefix (void); -static void cris_relax_reg_prefix (void); -static void cris_sym_leading_underscore (void); -static void cris_sym_no_leading_underscore (void); -static char *cris_insn_first_word_frag (void); - -/* Handle to the opcode hash table. */ -static struct hash_control *op_hash = NULL; - -/* If we target cris-axis-linux-gnu (as opposed to generic cris-axis-elf), - we default to no underscore and required register-prefixes. The - difference is in the default values. */ -#ifdef TE_LINUX -#define DEFAULT_CRIS_AXIS_LINUX_GNU TRUE -#else -#define DEFAULT_CRIS_AXIS_LINUX_GNU FALSE -#endif - -/* Whether we demand that registers have a `$' prefix. Default here. */ -static bfd_boolean demand_register_prefix = DEFAULT_CRIS_AXIS_LINUX_GNU; - -/* Whether global user symbols have a leading underscore. Default here. */ -static bfd_boolean symbols_have_leading_underscore - = !DEFAULT_CRIS_AXIS_LINUX_GNU; - -/* Whether or not we allow PIC, and expand to PIC-friendly constructs. */ -static bfd_boolean pic = FALSE; - -/* If we're configured for "cris", default to allow all v0..v10 - instructions and register names. */ -#ifndef DEFAULT_CRIS_ARCH -#define DEFAULT_CRIS_ARCH cris_any_v0_v10 -#endif - -/* No whitespace in the CONCAT2 parameter list. */ -static enum cris_archs cris_arch = XCONCAT2 (arch_,DEFAULT_CRIS_ARCH); - -const pseudo_typeS md_pseudo_table[] = -{ - {"dword", cons, 4}, - {"syntax", s_syntax, 0}, - {"file", s_cris_file, 0}, - {"loc", s_cris_loc, 0}, - {"arch", s_cris_arch, 0}, - {NULL, 0, 0} -}; - -static int warn_for_branch_expansion = 0; - -/* Whether to emit error when a MULS/MULU could be located last on a - cache-line. */ -static int err_for_dangerous_mul_placement - = (XCONCAT2 (arch_,DEFAULT_CRIS_ARCH) != arch_crisv32); - -const char cris_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 slash-star will always start a comment. */ -const char line_comment_chars[] = "#"; -const char line_separator_chars[] = "@"; - -/* Now all floating point support is shut off. See md_atof. */ -const char EXP_CHARS[] = ""; -const char FLT_CHARS[] = ""; - -/* For CRIS, we encode the relax_substateTs (in e.g. fr_substate) as: - 2 1 0 - ---/ /--+-----------------+-----------------+-----------------+ - | what state ? | how long ? | - ---/ /--+-----------------+-----------------+-----------------+ - - The "how long" bits are 00 = byte, 01 = word, 10 = dword (long). - Not all lengths are legit for a given value of (what state). - - Groups for CRIS address relaxing: - - 1. Bcc (pre-V32) - length: byte, word, 10-byte expansion - - 2. BDAP - length: byte, word, dword - - 3. MULS/MULU - Not really a relaxation (no infrastructure to get delay-slots - right), just an alignment and placement checker for the v10 - multiply/cache-bug. - - 4. Bcc (V32 and later) - length: byte, word, 14-byte expansion - - 5. Bcc (V10+V32) - length: byte, word, error - - 6. BA (V32) - length: byte, word, dword - - 7. LAPC (V32) - length: byte, dword - */ - -#define STATE_COND_BRANCH (1) -#define STATE_BASE_PLUS_DISP_PREFIX (2) -#define STATE_MUL (3) -#define STATE_COND_BRANCH_V32 (4) -#define STATE_COND_BRANCH_COMMON (5) -#define STATE_ABS_BRANCH_V32 (6) -#define STATE_LAPC (7) -#define STATE_COND_BRANCH_PIC (8) - -#define STATE_LENGTH_MASK (3) -#define STATE_BYTE (0) -#define STATE_WORD (1) -#define STATE_DWORD (2) -/* Symbol undefined. */ -#define STATE_UNDF (3) -#define STATE_MAX_LENGTH (3) - -/* These displacements are relative to the address following the opcode - word of the instruction. The first letter is Byte, Word. The 2nd - letter is Forward, Backward. */ - -#define BRANCH_BF ( 254) -#define BRANCH_BB (-256) -#define BRANCH_BF_V32 ( 252) -#define BRANCH_BB_V32 (-258) -#define BRANCH_WF (2 + 32767) -#define BRANCH_WB (2 + -32768) -#define BRANCH_WF_V32 (-2 + 32767) -#define BRANCH_WB_V32 (-2 + -32768) - -#define BDAP_BF ( 127) -#define BDAP_BB (-128) -#define BDAP_WF ( 32767) -#define BDAP_WB (-32768) - -#define ENCODE_RELAX(what, length) (((what) << 2) + (length)) - -const relax_typeS md_cris_relax_table[] = -{ - /* Error sentinel (0, 0). */ - {1, 1, 0, 0}, - - /* Unused (0, 1). */ - {1, 1, 0, 0}, - - /* Unused (0, 2). */ - {1, 1, 0, 0}, - - /* Unused (0, 3). */ - {1, 1, 0, 0}, - - /* Bcc o (1, 0). */ - {BRANCH_BF, BRANCH_BB, 0, ENCODE_RELAX (1, 1)}, - - /* Bcc [PC+] (1, 1). */ - {BRANCH_WF, BRANCH_WB, 2, ENCODE_RELAX (1, 2)}, - - /* BEXT/BWF, BA, JUMP (external), JUMP (always), Bnot_cc, JUMP (default) - (1, 2). */ - {0, 0, 10, 0}, - - /* Unused (1, 3). */ - {1, 1, 0, 0}, - - /* BDAP o (2, 0). */ - {BDAP_BF, BDAP_BB, 0, ENCODE_RELAX (2, 1)}, - - /* BDAP.[bw] [PC+] (2, 1). */ - {BDAP_WF, BDAP_WB, 2, ENCODE_RELAX (2, 2)}, - - /* BDAP.d [PC+] (2, 2). */ - {0, 0, 4, 0}, - - /* Unused (2, 3). */ - {1, 1, 0, 0}, - - /* MULS/MULU (3, 0). Positions (3, 1..3) are unused. */ - {0, 0, 0, 0}, {0, 0, 0, 0}, {0, 0, 0, 0}, {0, 0, 0, 0}, - - /* V32: Bcc o (4, 0). */ - {BRANCH_BF_V32, BRANCH_BB_V32, 0, ENCODE_RELAX (4, 1)}, - - /* V32: Bcc [PC+] (4, 1). */ - {BRANCH_WF_V32, BRANCH_WB_V32, 2, ENCODE_RELAX (4, 2)}, - - /* V32: BA .+12; NOP; BA32 target; NOP; Bcc .-6 (4, 2). */ - {0, 0, 12, 0}, - - /* Unused (4, 3). */ - {1, 1, 0, 0}, - - /* COMMON: Bcc o (5, 0). The offsets are calculated as for v32. Code - should contain two nop insns (or four if offset size is large or - unknown) after every label. */ - {BRANCH_BF_V32, BRANCH_BB_V32, 0, ENCODE_RELAX (5, 1)}, - - /* COMMON: Bcc [PC+] (5, 1). */ - {BRANCH_WF_V32, BRANCH_WB_V32, 2, ENCODE_RELAX (5, 2)}, - - /* COMMON: FIXME: ???. Treat as error currently. */ - {0, 0, 12, 0}, - - /* Unused (5, 3). */ - {1, 1, 0, 0}, - - /* V32: BA o (6, 0). */ - {BRANCH_BF_V32, BRANCH_BB_V32, 0, ENCODE_RELAX (6, 1)}, - - /* V32: BA.W (6, 1). */ - {BRANCH_WF_V32, BRANCH_WB_V32, 2, ENCODE_RELAX (6, 2)}, - - /* V32: BA.D (6, 2). */ - {0, 0, 4, 0}, - - /* Unused (6, 3). */ - {1, 1, 0, 0}, - - /* LAPC: LAPCQ .+0..15*2,Rn (7, 0). */ - {14*2, -1*2, 0, ENCODE_RELAX (7, 2)}, - - /* Unused (7, 1). - While there's a shorter sequence, e.g. LAPCQ + an ADDQ or SUBQ, - that would affect flags, so we can't do that as it wouldn't be a - proper insn expansion of LAPCQ. This row is associated with a - 2-byte expansion, so it's unused rather than the next. */ - {1, 1, 0, 0}, - - /* LAPC: LAPC.D (7, 2). */ - {0, 0, 4, 0}, - - /* Unused (7, 3). */ - {1, 1, 0, 0}, - - /* PIC for pre-v32: Bcc o (8, 0). */ - {BRANCH_BF, BRANCH_BB, 0, ENCODE_RELAX (STATE_COND_BRANCH_PIC, 1)}, - - /* Bcc [PC+] (8, 1). */ - {BRANCH_WF, BRANCH_WB, 2, ENCODE_RELAX (STATE_COND_BRANCH_PIC, 2)}, - - /* 32-bit expansion, PIC (8, 2). */ - {0, 0, 12, 0}, - - /* Unused (8, 3). */ - {1, 1, 0, 0} -}; - -#undef BDAP_BF -#undef BDAP_BB -#undef BDAP_WF -#undef BDAP_WB - -/* Target-specific multicharacter options, not const-declared. */ -struct option md_longopts[] = -{ -#define OPTION_NO_US (OPTION_MD_BASE + 0) - {"no-underscore", no_argument, NULL, OPTION_NO_US}, -#define OPTION_US (OPTION_MD_BASE + 1) - {"underscore", no_argument, NULL, OPTION_US}, -#define OPTION_PIC (OPTION_US + 1) - {"pic", no_argument, NULL, OPTION_PIC}, -#define OPTION_MULBUG_ABORT_ON (OPTION_PIC + 1) - {"mul-bug-abort", no_argument, NULL, OPTION_MULBUG_ABORT_ON}, -#define OPTION_MULBUG_ABORT_OFF (OPTION_MULBUG_ABORT_ON + 1) - {"no-mul-bug-abort", no_argument, NULL, OPTION_MULBUG_ABORT_OFF}, -#define OPTION_ARCH (OPTION_MULBUG_ABORT_OFF + 1) - {"march", required_argument, NULL, OPTION_ARCH}, - {NULL, no_argument, NULL, 0} -}; - -/* Not const-declared. */ -size_t md_longopts_size = sizeof (md_longopts); -const char *md_shortopts = "hHN"; - -/* At first glance, this may seems wrong and should be 4 (ba + nop); but - since a short_jump must skip a *number* of long jumps, it must also be - a long jump. Here, we hope to make it a "ba [16bit_offs]" and a "nop" - for the delay slot and hope that the jump table at most needs - 32767/4=8191 long-jumps. A branch is better than a jump, since it is - relative; we will not have a reloc to fix up somewhere. - - Note that we can't add relocs, because relaxation uses these fixed - numbers, and md_create_short_jump is called after relaxation. */ - -int md_short_jump_size = 6; - -/* The v32 version has a delay-slot, hence two bytes longer. - The pre-v32 PIC version uses a prefixed insn. */ -#define cris_any_v0_v10_long_jump_size 6 -#define cris_any_v0_v10_long_jump_size_pic 8 -#define crisv32_long_jump_size 8 - -int md_long_jump_size = XCONCAT2 (DEFAULT_CRIS_ARCH,_long_jump_size); - -/* Report output format. Small changes in output format (like elf - variants below) can happen until all options are parsed, but after - that, the output format must remain fixed. */ - -const char * -cris_target_format (void) -{ - switch (OUTPUT_FLAVOR) - { - case bfd_target_aout_flavour: - return "a.out-cris"; - - case bfd_target_elf_flavour: - if (symbols_have_leading_underscore) - return "elf32-us-cris"; - return "elf32-cris"; - - default: - abort (); - return NULL; - } -} - -/* Return a bfd_mach_cris... value corresponding to the value of - cris_arch. */ - -unsigned int -cris_mach (void) -{ - unsigned int retval = 0; - - switch (cris_arch) - { - case arch_cris_common_v10_v32: - retval = bfd_mach_cris_v10_v32; - break; - - case arch_crisv32: - retval = bfd_mach_cris_v32; - break; - - case arch_crisv10: - case arch_cris_any_v0_v10: - retval = bfd_mach_cris_v0_v10; - break; - - default: - BAD_CASE (cris_arch); - } - - return retval; -} - -/* We need a port-specific relaxation function to cope with sym2 - sym1 - relative expressions with both symbols in the same segment (but not - necessarily in the same frag as this insn), for example: - move.d [pc+sym2-(sym1-2)],r10 - sym1: - The offset can be 8, 16 or 32 bits long. */ - -long -cris_relax_frag (segT seg ATTRIBUTE_UNUSED, fragS *fragP, - long stretch ATTRIBUTE_UNUSED) -{ - long growth; - offsetT aim = 0; - symbolS *symbolP; - const relax_typeS *this_type; - const relax_typeS *start_type; - relax_substateT next_state; - relax_substateT this_state; - const relax_typeS *table = TC_GENERIC_RELAX_TABLE; - - /* We only have to cope with frags as prepared by - md_estimate_size_before_relax. The dword cases may get here - because of the different reasons that they aren't relaxable. */ - switch (fragP->fr_subtype) - { - case ENCODE_RELAX (STATE_COND_BRANCH, STATE_DWORD): - case ENCODE_RELAX (STATE_COND_BRANCH_V32, STATE_DWORD): - case ENCODE_RELAX (STATE_COND_BRANCH_COMMON, STATE_DWORD): - case ENCODE_RELAX (STATE_ABS_BRANCH_V32, STATE_DWORD): - case ENCODE_RELAX (STATE_LAPC, STATE_DWORD): - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_DWORD): - /* When we get to these states, the frag won't grow any more. */ - return 0; - - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_WORD): - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_BYTE): - if (fragP->fr_symbol == NULL - || S_GET_SEGMENT (fragP->fr_symbol) != absolute_section) - as_fatal (_("internal inconsistency problem in %s: fr_symbol %lx"), - __FUNCTION__, (long) fragP->fr_symbol); - symbolP = fragP->fr_symbol; - if (symbol_resolved_p (symbolP)) - as_fatal (_("internal inconsistency problem in %s: resolved symbol"), - __FUNCTION__); - aim = S_GET_VALUE (symbolP); - break; - - case ENCODE_RELAX (STATE_MUL, STATE_BYTE): - /* Nothing to do here. */ - return 0; - - default: - as_fatal (_("internal inconsistency problem in %s: fr_subtype %d"), - __FUNCTION__, fragP->fr_subtype); - } - - /* The rest is stolen from relax_frag. There's no obvious way to - share the code, but fortunately no requirement to keep in sync as - long as fragP->fr_symbol does not have its segment changed. */ - - this_state = fragP->fr_subtype; - start_type = this_type = table + this_state; - - if (aim < 0) - { - /* Look backwards. */ - for (next_state = this_type->rlx_more; next_state;) - if (aim >= this_type->rlx_backward) - next_state = 0; - else - { - /* Grow to next state. */ - this_state = next_state; - this_type = table + this_state; - next_state = this_type->rlx_more; - } - } - else - { - /* Look forwards. */ - for (next_state = this_type->rlx_more; next_state;) - if (aim <= this_type->rlx_forward) - next_state = 0; - else - { - /* Grow to next state. */ - this_state = next_state; - this_type = table + this_state; - next_state = this_type->rlx_more; - } - } - - growth = this_type->rlx_length - start_type->rlx_length; - if (growth != 0) - fragP->fr_subtype = this_state; - return growth; -} - -/* Prepare machine-dependent frags for relaxation. - - Called just before relaxation starts. Any symbol that is now undefined - will not become defined. - - Return the correct fr_subtype in the frag. - - Return the initial "guess for fr_var" to caller. The guess for fr_var - is *actually* the growth beyond fr_fix. Whatever we do to grow fr_fix - or fr_var contributes to our returned value. - - Although it may not be explicit in the frag, pretend - fr_var starts with a value. */ - -int -md_estimate_size_before_relax (fragS *fragP, segT segment_type) -{ - int old_fr_fix; - symbolS *symbolP = fragP->fr_symbol; - -#define HANDLE_RELAXABLE(state) \ - case ENCODE_RELAX (state, STATE_UNDF): \ - if (symbolP != NULL \ - && S_GET_SEGMENT (symbolP) == segment_type \ - && !S_IS_WEAK (symbolP)) \ - /* The symbol lies in the same segment - a relaxable \ - case. */ \ - fragP->fr_subtype \ - = ENCODE_RELAX (state, STATE_BYTE); \ - else \ - /* Unknown or not the same segment, so not relaxable. */ \ - fragP->fr_subtype \ - = ENCODE_RELAX (state, STATE_DWORD); \ - fragP->fr_var \ - = md_cris_relax_table[fragP->fr_subtype].rlx_length; \ - break - - old_fr_fix = fragP->fr_fix; - - switch (fragP->fr_subtype) - { - HANDLE_RELAXABLE (STATE_COND_BRANCH); - HANDLE_RELAXABLE (STATE_COND_BRANCH_V32); - HANDLE_RELAXABLE (STATE_COND_BRANCH_COMMON); - HANDLE_RELAXABLE (STATE_COND_BRANCH_PIC); - HANDLE_RELAXABLE (STATE_ABS_BRANCH_V32); - - case ENCODE_RELAX (STATE_LAPC, STATE_UNDF): - if (symbolP != NULL - && S_GET_SEGMENT (symbolP) == segment_type - && !S_IS_WEAK (symbolP)) - { - /* The symbol lies in the same segment - a relaxable case. - Check if we currently have an odd offset; we can't code - that into the instruction. Relaxing presumably only cause - multiple-of-two changes, so we should only need to adjust - for that here. */ - bfd_vma target_address - = (symbolP - ? S_GET_VALUE (symbolP) - : 0) + fragP->fr_offset; - bfd_vma var_part_offset = fragP->fr_fix; - bfd_vma address_of_var_part = fragP->fr_address + var_part_offset; - long offset = target_address - (address_of_var_part - 2); - - fragP->fr_subtype - = (offset & 1) - ? ENCODE_RELAX (STATE_LAPC, STATE_DWORD) - : ENCODE_RELAX (STATE_LAPC, STATE_BYTE); - } - else - /* Unknown or not the same segment, so not relaxable. */ - fragP->fr_subtype - = ENCODE_RELAX (STATE_LAPC, STATE_DWORD); - fragP->fr_var - = md_cris_relax_table[fragP->fr_subtype].rlx_length; - break; - - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_UNDF): - /* Note that we can not do anything sane with relaxing - [rX + a_known_symbol_in_text], it will have to be a 32-bit - value. - - We could play tricks with managing a constant pool and make - a_known_symbol_in_text a "bdap [pc + offset]" pointing there - (like the GOT for ELF shared libraries), but that's no use, it - would in general be no shorter or faster code, only more - complicated. */ - - if (S_GET_SEGMENT (symbolP) != absolute_section) - { - /* Go for dword if not absolute or same segment. */ - fragP->fr_subtype - = ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_DWORD); - fragP->fr_var = md_cris_relax_table[fragP->fr_subtype].rlx_length; - } - else if (!symbol_resolved_p (fragP->fr_symbol)) - { - /* The symbol will eventually be completely resolved as an - absolute expression, but right now it depends on the result - of relaxation and we don't know anything else about the - value. We start relaxation with the assumption that it'll - fit in a byte. */ - fragP->fr_subtype - = ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_BYTE); - fragP->fr_var = md_cris_relax_table[fragP->fr_subtype].rlx_length; - } - else - { - /* Absolute expression. */ - long int value; - value = (symbolP != NULL - ? S_GET_VALUE (symbolP) : 0) + fragP->fr_offset; - - if (value >= -128 && value <= 127) - { - /* Byte displacement. */ - (fragP->fr_opcode)[0] = value; - } - else - { - /* Word or dword displacement. */ - int pow2_of_size = 1; - char *writep; - - if (value < -32768 || value > 32767) - { - /* Outside word range, make it a dword. */ - pow2_of_size = 2; - } - - /* Modify the byte-offset BDAP into a word or dword offset - BDAP. Or really, a BDAP rX,8bit into a - BDAP.[wd] rX,[PC+] followed by a word or dword. */ - (fragP->fr_opcode)[0] = BDAP_PC_LOW + pow2_of_size * 16; - - /* Keep the register number in the highest four bits. */ - (fragP->fr_opcode)[1] &= 0xF0; - (fragP->fr_opcode)[1] |= BDAP_INCR_HIGH; - - /* It grew by two or four bytes. */ - fragP->fr_fix += 1 << pow2_of_size; - writep = fragP->fr_literal + old_fr_fix; - md_number_to_chars (writep, value, 1 << pow2_of_size); - } - frag_wane (fragP); - } - break; - - case ENCODE_RELAX (STATE_COND_BRANCH, STATE_BYTE): - case ENCODE_RELAX (STATE_COND_BRANCH, STATE_WORD): - case ENCODE_RELAX (STATE_COND_BRANCH, STATE_DWORD): - case ENCODE_RELAX (STATE_COND_BRANCH_PIC, STATE_BYTE): - case ENCODE_RELAX (STATE_COND_BRANCH_PIC, STATE_WORD): - case ENCODE_RELAX (STATE_COND_BRANCH_PIC, STATE_DWORD): - case ENCODE_RELAX (STATE_COND_BRANCH_V32, STATE_BYTE): - case ENCODE_RELAX (STATE_COND_BRANCH_V32, STATE_WORD): - case ENCODE_RELAX (STATE_COND_BRANCH_V32, STATE_DWORD): - case ENCODE_RELAX (STATE_COND_BRANCH_COMMON, STATE_BYTE): - case ENCODE_RELAX (STATE_COND_BRANCH_COMMON, STATE_WORD): - case ENCODE_RELAX (STATE_COND_BRANCH_COMMON, STATE_DWORD): - case ENCODE_RELAX (STATE_ABS_BRANCH_V32, STATE_BYTE): - case ENCODE_RELAX (STATE_ABS_BRANCH_V32, STATE_WORD): - case ENCODE_RELAX (STATE_ABS_BRANCH_V32, STATE_DWORD): - case ENCODE_RELAX (STATE_LAPC, STATE_BYTE): - case ENCODE_RELAX (STATE_LAPC, STATE_DWORD): - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_BYTE): - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_WORD): - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_DWORD): - /* When relaxing a section for the second time, we don't need to - do anything except making sure that fr_var is set right. */ - fragP->fr_var = md_cris_relax_table[fragP->fr_subtype].rlx_length; - break; - - case ENCODE_RELAX (STATE_MUL, STATE_BYTE): - /* Nothing to do here. */ - break; - - default: - BAD_CASE (fragP->fr_subtype); - } - - return fragP->fr_var + (fragP->fr_fix - old_fr_fix); -} - -/* Perform post-processing of machine-dependent frags after relaxation. - Called after relaxation is finished. - In: Address of frag. - fr_type == rs_machine_dependent. - fr_subtype is what the address relaxed to. - - Out: Any fixS:s and constants are set up. - - The caller will turn the frag into a ".space 0". */ - -void -md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT sec ATTRIBUTE_UNUSED, - fragS *fragP) -{ - /* Pointer to first byte in variable-sized part of the frag. */ - char *var_partp; - - /* Pointer to first opcode byte in frag. */ - char *opcodep; - - /* Used to check integrity of the relaxation. - One of 2 = long, 1 = word, or 0 = byte. */ - int length_code; - - /* Size in bytes of variable-sized part of frag. */ - int var_part_size = 0; - - /* This is part of *fragP. It contains all information about addresses - and offsets to varying parts. */ - symbolS *symbolP; - unsigned long var_part_offset; - - /* Where, in file space, is _var of *fragP? */ - unsigned long address_of_var_part = 0; - - /* Where, in file space, does addr point? */ - unsigned long target_address; - - know (fragP->fr_type == rs_machine_dependent); - - length_code = fragP->fr_subtype & STATE_LENGTH_MASK; - know (length_code >= 0 && length_code < STATE_MAX_LENGTH); - - var_part_offset = fragP->fr_fix; - var_partp = fragP->fr_literal + var_part_offset; - opcodep = fragP->fr_opcode; - - symbolP = fragP->fr_symbol; - target_address = (symbolP ? S_GET_VALUE (symbolP) : 0) + fragP->fr_offset; - address_of_var_part = fragP->fr_address + var_part_offset; - - switch (fragP->fr_subtype) - { - case ENCODE_RELAX (STATE_COND_BRANCH, STATE_BYTE): - case ENCODE_RELAX (STATE_COND_BRANCH_PIC, STATE_BYTE): - case ENCODE_RELAX (STATE_COND_BRANCH_V32, STATE_BYTE): - case ENCODE_RELAX (STATE_COND_BRANCH_COMMON, STATE_BYTE): - case ENCODE_RELAX (STATE_ABS_BRANCH_V32, STATE_BYTE): - opcodep[0] = branch_disp ((target_address - address_of_var_part)); - var_part_size = 0; - break; - - case ENCODE_RELAX (STATE_COND_BRANCH, STATE_WORD): - case ENCODE_RELAX (STATE_COND_BRANCH_PIC, STATE_WORD): - case ENCODE_RELAX (STATE_COND_BRANCH_V32, STATE_WORD): - case ENCODE_RELAX (STATE_COND_BRANCH_COMMON, STATE_WORD): - case ENCODE_RELAX (STATE_ABS_BRANCH_V32, STATE_WORD): - /* We had a quick immediate branch, now turn it into a word one i.e. a - PC autoincrement. */ - opcodep[0] = BRANCH_PC_LOW; - opcodep[1] &= 0xF0; - opcodep[1] |= BRANCH_INCR_HIGH; - md_number_to_chars (var_partp, - (long) - (target_address - - (address_of_var_part - + (cris_arch == arch_crisv32 - || cris_arch == arch_cris_common_v10_v32 - ? -2 : 2))), - 2); - var_part_size = 2; - break; - - case ENCODE_RELAX (STATE_COND_BRANCH, STATE_DWORD): - gen_cond_branch_32 (fragP->fr_opcode, var_partp, fragP, - fragP->fr_symbol, (symbolS *) NULL, - fragP->fr_offset); - /* Ten bytes added: a branch, nop and a jump. */ - var_part_size = 2 + 2 + 4 + 2; - break; - - case ENCODE_RELAX (STATE_COND_BRANCH_PIC, STATE_DWORD): - gen_cond_branch_32 (fragP->fr_opcode, var_partp, fragP, - fragP->fr_symbol, (symbolS *) NULL, - fragP->fr_offset); - /* Twelve bytes added: a branch, nop and a pic-branch-32. */ - var_part_size = 2 + 2 + 4 + 2 + 2; - break; - - case ENCODE_RELAX (STATE_COND_BRANCH_V32, STATE_DWORD): - gen_cond_branch_32 (fragP->fr_opcode, var_partp, fragP, - fragP->fr_symbol, (symbolS *) NULL, - fragP->fr_offset); - /* Twelve bytes added: a branch, nop and another branch and nop. */ - var_part_size = 2 + 2 + 2 + 4 + 2; - break; - - case ENCODE_RELAX (STATE_COND_BRANCH_COMMON, STATE_DWORD): - as_bad_where (fragP->fr_file, fragP->fr_line, - _("Relaxation to long branches for .arch common_v10_v32\ - not implemented")); - /* Pretend we have twelve bytes for sake of quelling further - errors. */ - var_part_size = 2 + 2 + 2 + 4 + 2; - break; - - case ENCODE_RELAX (STATE_ABS_BRANCH_V32, STATE_DWORD): - /* We had a quick immediate branch or a word immediate ba. Now - turn it into a dword one. */ - opcodep[0] = BA_DWORD_OPCODE & 255; - opcodep[1] = (BA_DWORD_OPCODE >> 8) & 255; - fix_new (fragP, var_partp - fragP->fr_literal, 4, symbolP, - fragP->fr_offset + 6, 1, BFD_RELOC_32_PCREL); - var_part_size = 4; - break; - - case ENCODE_RELAX (STATE_LAPC, STATE_BYTE): - { - long offset = target_address - (address_of_var_part - 2); - - /* This is mostly a sanity check; useful occurrences (if there - really are any) should have been caught in - md_estimate_size_before_relax. We can (at least - theoretically) stumble over invalid code with odd sizes and - .p2aligns within the code, so emit an error if that happens. - (The generic relaxation machinery is not fit to check this.) */ - - if (offset & 1) - as_bad_where (fragP->fr_file, fragP->fr_line, - _("Complicated LAPC target operand is not\ - a multiple of two. Use LAPC.D")); - - /* FIXME: This *is* a sanity check. Remove when done with. */ - if (offset > 15*2 || offset < 0) - as_fatal (_("Internal error found in md_convert_frag: offset %ld.\ - Please report this."), - offset); - - opcodep[0] |= (offset / 2) & 0xf; - var_part_size = 0; - } - break; - - case ENCODE_RELAX (STATE_LAPC, STATE_DWORD): - { - md_number_to_chars (opcodep, - LAPC_DWORD_OPCODE + (opcodep[1] & 0xf0) * 256, - 2); - /* Remember that the reloc is against the position *after* the - relocated contents, so we need to adjust to the start of - the insn. */ - fix_new (fragP, var_partp - fragP->fr_literal, 4, fragP->fr_symbol, - fragP->fr_offset + 6, 1, BFD_RELOC_32_PCREL); - var_part_size = 4; - } - break; - - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_BYTE): - if (symbolP == NULL) - as_fatal (_("internal inconsistency in %s: bdapq no symbol"), - __FUNCTION__); - opcodep[0] = S_GET_VALUE (symbolP); - var_part_size = 0; - break; - - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_WORD): - /* We had a BDAP 8-bit "quick immediate", now turn it into a 16-bit - one that uses PC autoincrement. */ - opcodep[0] = BDAP_PC_LOW + (1 << 4); - opcodep[1] &= 0xF0; - opcodep[1] |= BDAP_INCR_HIGH; - if (symbolP == NULL) - as_fatal (_("internal inconsistency in %s: bdap.w with no symbol"), - __FUNCTION__); - md_number_to_chars (var_partp, S_GET_VALUE (symbolP), 2); - var_part_size = 2; - break; - - case ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_DWORD): - /* We had a BDAP 16-bit "word", change the offset to a dword. */ - opcodep[0] = BDAP_PC_LOW + (2 << 4); - opcodep[1] &= 0xF0; - opcodep[1] |= BDAP_INCR_HIGH; - if (fragP->fr_symbol == NULL) - md_number_to_chars (var_partp, fragP->fr_offset, 4); - else - fix_new (fragP, var_partp - fragP->fr_literal, 4, fragP->fr_symbol, - fragP->fr_offset, 0, BFD_RELOC_32); - var_part_size = 4; - break; - - case ENCODE_RELAX (STATE_MUL, STATE_BYTE): - /* This is the only time we check position and aligmnent of the - placement-tracking frag. */ - if (sec->alignment_power < 2) - as_bad_where (fragP->fr_file, fragP->fr_line, - _("section alignment must be >= 4 bytes to check MULS/MULU safeness")); - else - { - /* If the address after the MULS/MULU has alignment which is - that of the section and may be that of a cache-size of the - buggy versions, then the MULS/MULU can be placed badly. */ - if ((address_of_var_part - & ((1 << sec->alignment_power) - 1) & 31) == 0) - as_bad_where (fragP->fr_file, fragP->fr_line, - _("dangerous MULS/MULU location; give it higher alignment")); - } - break; - - default: - BAD_CASE (fragP->fr_subtype); - break; - } - - fragP->fr_fix += var_part_size; -} - -/* Generate a short jump around a secondary jump table. - Used by md_create_long_jump. - - This used to be md_create_short_jump, but is now called from - md_create_long_jump instead, when sufficient, since the sizes of the - jumps are the same for pre-v32. */ - -static void -cris_create_short_jump (char *storep, addressT from_addr, addressT to_addr, - fragS *fragP ATTRIBUTE_UNUSED, - symbolS *to_symbol ATTRIBUTE_UNUSED) -{ - long int distance; - - /* See md_create_long_jump about the comment on the "+ 2". */ - long int max_minimal_minus_distance; - long int max_minimal_plus_distance; - int nop_opcode; - - if (cris_arch == arch_crisv32) - { - max_minimal_minus_distance = BRANCH_BB_V32 + 2; - max_minimal_plus_distance = BRANCH_BF_V32 + 2; - nop_opcode = NOP_OPCODE_V32; - } - else - { - max_minimal_minus_distance = BRANCH_BB + 2; - max_minimal_plus_distance = BRANCH_BF + 2; - nop_opcode = NOP_OPCODE; - } - - distance = to_addr - from_addr; - - if (max_minimal_minus_distance <= distance - && distance <= max_minimal_plus_distance) - { - /* Create a "short" short jump: "BA distance - 2". */ - storep[0] = branch_disp (distance - 2); - storep[1] = BA_QUICK_HIGH; - - /* A nop for the delay slot. */ - md_number_to_chars (storep + 2, nop_opcode, 2); - - /* The extra word should be filled with something sane too. Make it - a nop to keep disassembly sane. */ - md_number_to_chars (storep + 4, nop_opcode, 2); - } - else - { - /* Make it a "long" short jump: "BA (PC+)". */ - md_number_to_chars (storep, BA_PC_INCR_OPCODE, 2); - - /* ".WORD distance - 4". */ - md_number_to_chars (storep + 2, - (long) (distance - 4 - - (cris_arch == arch_crisv32 - ? -4 : 0)), - 2); - - /* A nop for the delay slot. */ - md_number_to_chars (storep + 4, nop_opcode, 2); - } -} - -/* Generate a long jump in a secondary jump table. - - storep Where to store the jump instruction. - from_addr Address of the jump instruction. - to_addr Destination address of the jump. - fragP Which frag the destination address operand - lies in. - to_symbol Destination symbol. */ - -void -md_create_long_jump (char *storep, addressT from_addr, addressT to_addr, - fragS *fragP, symbolS *to_symbol) -{ - long int distance; - - /* FIXME: What's that "+ 3"? It comes from the magic numbers that - used to be here, it's just translated to the limit macros used in - the relax table. But why + 3? */ - long int max_short_minus_distance - = cris_arch != arch_crisv32 ? BRANCH_WB + 3 : BRANCH_WB_V32 + 3; - - long int max_short_plus_distance - = cris_arch != arch_crisv32 ? BRANCH_WF + 3 : BRANCH_WF_V32 + 3; - - /* Bail out for compatibility mode. (It seems it can be implemented, - perhaps with a 10-byte sequence: "move.d NNNN,$pc/$acr", "jump - $acr", "nop"; but doesn't seem worth it at the moment.) */ - if (cris_arch == arch_cris_common_v10_v32) - as_fatal (_("Out-of-range .word offset handling\ - is not implemented for .arch common_v10_v32")); - - distance = to_addr - from_addr; - - if (max_short_minus_distance <= distance - && distance <= max_short_plus_distance) - /* Then make it a "short" long jump. */ - cris_create_short_jump (storep, from_addr, to_addr, fragP, - to_symbol); - else - { - /* We have a "long" long jump: "JUMP [PC+]". If CRISv32, always - make it a BA. Else make it an "MOVE [PC=PC+N],P0" if we're supposed - to emit PIC code. */ - md_number_to_chars (storep, - cris_arch == arch_crisv32 - ? BA_DWORD_OPCODE - : (pic ? MOVE_PC_INCR_OPCODE_PREFIX - : JUMP_PC_INCR_OPCODE), - 2); - - /* Follow with a ".DWORD to_addr", PC-relative for PIC. */ - fix_new (fragP, storep + 2 - fragP->fr_literal, 4, to_symbol, - cris_arch == arch_crisv32 ? 6 : 0, - cris_arch == arch_crisv32 || pic ? 1 : 0, - cris_arch == arch_crisv32 || pic - ? BFD_RELOC_32_PCREL : BFD_RELOC_32); - - /* Follow it with a "NOP" for CRISv32. */ - if (cris_arch == arch_crisv32) - md_number_to_chars (storep + 6, NOP_OPCODE_V32, 2); - else if (pic) - /* ...and the rest of the move-opcode for pre-v32 PIC. */ - md_number_to_chars (storep + 6, MOVE_PC_INCR_OPCODE_SUFFIX, 2); - } -} - -/* Allocate space for the first piece of an insn, and mark it as the - start of the insn for debug-format use. */ - -static char * -cris_insn_first_word_frag (void) -{ - char *insnp = frag_more (2); - - /* We need to mark the start of the insn by passing dwarf2_emit_insn - the offset from the current fragment position. This must be done - after the first fragment is created but before any other fragments - (fixed or varying) are created. Note that the offset only - corresponds to the "size" of the insn for a fixed-size, - non-expanded insn. */ - if (OUTPUT_FLAVOR == bfd_target_elf_flavour) - dwarf2_emit_insn (2); - - return insnp; -} - -/* Port-specific assembler initialization. */ - -void -md_begin (void) -{ - const char *hashret = NULL; - int i = 0; - - /* Set up a hash table for the instructions. */ - op_hash = hash_new (); - if (op_hash == NULL) - as_fatal (_("Virtual memory exhausted")); - - /* Enable use of ".if ..asm.arch.cris.v32" - and ".if ..asm.arch.cris.common_v10_v32" and a few others. */ - symbol_table_insert (symbol_new ("..asm.arch.cris.v32", absolute_section, - (cris_arch == arch_crisv32), - &zero_address_frag)); - symbol_table_insert (symbol_new ("..asm.arch.cris.v10", absolute_section, - (cris_arch == arch_crisv10), - &zero_address_frag)); - symbol_table_insert (symbol_new ("..asm.arch.cris.common_v10_v32", - absolute_section, - (cris_arch == arch_cris_common_v10_v32), - &zero_address_frag)); - symbol_table_insert (symbol_new ("..asm.arch.cris.any_v0_v10", - absolute_section, - (cris_arch == arch_cris_any_v0_v10), - &zero_address_frag)); - - while (cris_opcodes[i].name != NULL) - { - const char *name = cris_opcodes[i].name; - - if (! cris_insn_ver_valid_for_arch (cris_opcodes[i].applicable_version, - cris_arch)) - { - i++; - continue; - } - - /* Need to cast to get rid of "const". FIXME: Fix hash_insert instead. */ - hashret = hash_insert (op_hash, name, (void *) &cris_opcodes[i]); - - if (hashret != NULL && *hashret != '\0') - as_fatal (_("Can't hash `%s': %s\n"), cris_opcodes[i].name, - *hashret == 0 ? _("(unknown reason)") : hashret); - do - { - if (cris_opcodes[i].match & cris_opcodes[i].lose) - as_fatal (_("Buggy opcode: `%s' \"%s\"\n"), cris_opcodes[i].name, - cris_opcodes[i].args); - - ++i; - } - while (cris_opcodes[i].name != NULL - && strcmp (cris_opcodes[i].name, name) == 0); - } -} - -/* Assemble a source line. */ - -void -md_assemble (char *str) -{ - struct cris_instruction output_instruction; - struct cris_prefix prefix; - char *opcodep; - char *p; - - know (str); - - /* Do the low-level grunt - assemble to bits and split up into a prefix - and ordinary insn. */ - cris_process_instruction (str, &output_instruction, &prefix); - - /* Handle any prefixes to the instruction. */ - switch (prefix.kind) - { - case PREFIX_NONE: - break; - - /* When the expression is unknown for a BDAP, it can need 0, 2 or 4 - extra bytes, so we handle it separately. */ - case PREFIX_BDAP_IMM: - /* We only do it if the relocation is unspecified, i.e. not a PIC - relocation. */ - if (prefix.reloc == BFD_RELOC_NONE) - { - gen_bdap (prefix.base_reg_number, &prefix.expr); - break; - } - /* Fall through. */ - case PREFIX_BDAP: - case PREFIX_BIAP: - case PREFIX_DIP: - opcodep = cris_insn_first_word_frag (); - - /* Output the prefix opcode. */ - md_number_to_chars (opcodep, (long) prefix.opcode, 2); - - /* Having a specified reloc only happens for DIP and for BDAP with - PIC operands, but it is ok to drop through here for the other - prefixes as they can have no relocs specified. */ - if (prefix.reloc != BFD_RELOC_NONE) - { - unsigned int relocsize - = (prefix.kind == PREFIX_DIP - ? 4 : cris_get_pic_reloc_size (prefix.reloc)); - - p = frag_more (relocsize); - fix_new_exp (frag_now, (p - frag_now->fr_literal), relocsize, - &prefix.expr, 0, prefix.reloc); - } - break; - - case PREFIX_PUSH: - opcodep = cris_insn_first_word_frag (); - - /* Output the prefix opcode. Being a "push", we add the negative - size of the register to "sp". */ - if (output_instruction.spec_reg != NULL) - { - /* Special register. */ - opcodep[0] = -output_instruction.spec_reg->reg_size; - } - else - { - /* General register. */ - opcodep[0] = -4; - } - opcodep[1] = (REG_SP << 4) + (BDAP_QUICK_OPCODE >> 8); - break; - - default: - BAD_CASE (prefix.kind); - } - - /* If we only had a prefix insn, we're done. */ - if (output_instruction.insn_type == CRIS_INSN_NONE) - return; - - /* Done with the prefix. Continue with the main instruction. */ - if (prefix.kind == PREFIX_NONE) - opcodep = cris_insn_first_word_frag (); - else - opcodep = frag_more (2); - - /* Output the instruction opcode. */ - md_number_to_chars (opcodep, (long) (output_instruction.opcode), 2); - - /* Output the symbol-dependent instruction stuff. */ - if (output_instruction.insn_type == CRIS_INSN_BRANCH) - { - segT to_seg = absolute_section; - int is_undefined = 0; - int length_code; - - if (output_instruction.expr.X_op != O_constant) - { - to_seg = S_GET_SEGMENT (output_instruction.expr.X_add_symbol); - - if (to_seg == undefined_section) - is_undefined = 1; - } - - if (to_seg == now_seg || is_undefined - /* In CRISv32, there *is* a 32-bit absolute branch, so don't - emit the 12-byte sequence for known symbols in other - segments. */ - || (cris_arch == arch_crisv32 - && output_instruction.opcode == BA_QUICK_OPCODE)) - { - /* Handle complex expressions. */ - valueT addvalue - = (SIMPLE_EXPR (&output_instruction.expr) - ? output_instruction.expr.X_add_number - : 0); - symbolS *sym - = (SIMPLE_EXPR (&output_instruction.expr) - ? output_instruction.expr.X_add_symbol - : make_expr_symbol (&output_instruction.expr)); - - /* If is_undefined, the expression may still become now_seg. - That case is handled by md_estimate_size_before_relax. */ - length_code = to_seg == now_seg ? STATE_BYTE : STATE_UNDF; - - /* Make room for max twelve bytes of variable length for v32 mode - or PIC, ten for v10 and older. */ - frag_var (rs_machine_dependent, - (cris_arch == arch_crisv32 - || cris_arch == arch_cris_common_v10_v32 - || pic) ? 12 : 10, 0, - ENCODE_RELAX (cris_arch == arch_crisv32 - ? (output_instruction.opcode - == BA_QUICK_OPCODE - ? STATE_ABS_BRANCH_V32 - : STATE_COND_BRANCH_V32) - : (cris_arch == arch_cris_common_v10_v32 - ? STATE_COND_BRANCH_COMMON - : (pic ? STATE_COND_BRANCH_PIC - : STATE_COND_BRANCH)), - length_code), - sym, addvalue, opcodep); - } - else - { - /* We have: to_seg != now_seg && to_seg != undefined_section. - This means it is a branch to a known symbol in another - section, perhaps an absolute address. Emit a 32-bit branch. */ - char *cond_jump - = frag_more ((cris_arch == arch_crisv32 - || cris_arch == arch_cris_common_v10_v32 - || pic) - ? 12 : 10); - - gen_cond_branch_32 (opcodep, cond_jump, frag_now, - output_instruction.expr.X_add_symbol, - (symbolS *) NULL, - output_instruction.expr.X_add_number); - } - } - else if (output_instruction.insn_type == CRIS_INSN_MUL - && err_for_dangerous_mul_placement) - /* Create a frag which which we track the location of the mul insn - (in the last two bytes before the mul-frag). */ - frag_variant (rs_machine_dependent, 0, 0, - ENCODE_RELAX (STATE_MUL, STATE_BYTE), - NULL, 0, opcodep); - else - { - if (output_instruction.imm_oprnd_size > 0) - { - /* The instruction has an immediate operand. */ - enum bfd_reloc_code_real reloc = BFD_RELOC_NONE; - - switch (output_instruction.imm_oprnd_size) - { - /* Any byte-size immediate constants are treated as - word-size. FIXME: Thus overflow check does not work - correctly. */ - - case 2: - /* Note that size-check for the explicit reloc has already - been done when we get here. */ - if (output_instruction.reloc != BFD_RELOC_NONE) - reloc = output_instruction.reloc; - else - reloc = BFD_RELOC_16; - break; - - case 4: - /* Allow a relocation specified in the operand. */ - if (output_instruction.reloc != BFD_RELOC_NONE) - reloc = output_instruction.reloc; - else - reloc = BFD_RELOC_32; - break; - - default: - BAD_CASE (output_instruction.imm_oprnd_size); - } - - p = frag_more (output_instruction.imm_oprnd_size); - fix_new_exp (frag_now, (p - frag_now->fr_literal), - output_instruction.imm_oprnd_size, - &output_instruction.expr, - reloc == BFD_RELOC_32_PCREL - || reloc == BFD_RELOC_16_PCREL - || reloc == BFD_RELOC_8_PCREL, reloc); - } - else if (output_instruction.reloc == BFD_RELOC_CRIS_LAPCQ_OFFSET - && output_instruction.expr.X_md != 0) - { - /* Handle complex expressions. */ - valueT addvalue - = (output_instruction.expr.X_op_symbol != NULL - ? 0 : output_instruction.expr.X_add_number); - symbolS *sym - = (output_instruction.expr.X_op_symbol != NULL - ? make_expr_symbol (&output_instruction.expr) - : output_instruction.expr.X_add_symbol); - - /* This is a relaxing construct, so we need a frag_var rather - than the fix_new_exp call below. */ - frag_var (rs_machine_dependent, - 4, 0, - ENCODE_RELAX (STATE_LAPC, STATE_UNDF), - sym, addvalue, opcodep); - } - else if (output_instruction.reloc != BFD_RELOC_NONE) - { - /* An immediate operand that has a relocation and needs to be - processed further. */ - - /* It is important to use fix_new_exp here and everywhere else - (and not fix_new), as fix_new_exp can handle "difference - expressions" - where the expression contains a difference of - two symbols in the same segment. */ - fix_new_exp (frag_now, (opcodep - frag_now->fr_literal), 2, - &output_instruction.expr, - output_instruction.reloc == BFD_RELOC_32_PCREL - || output_instruction.reloc == BFD_RELOC_16_PCREL - || output_instruction.reloc == BFD_RELOC_8_PCREL - || (output_instruction.reloc - == BFD_RELOC_CRIS_LAPCQ_OFFSET), - output_instruction.reloc); - } - } -} - -/* Low level text-to-bits assembly. */ - -static void -cris_process_instruction (char *insn_text, struct cris_instruction *out_insnp, - struct cris_prefix *prefixp) -{ - char *s; - char modified_char = 0; - const char *args; - struct cris_opcode *instruction; - char *operands; - int match = 0; - int mode; - int regno; - int size_bits; - - /* Reset these fields to a harmless state in case we need to return in - error. */ - prefixp->kind = PREFIX_NONE; - prefixp->reloc = BFD_RELOC_NONE; - out_insnp->insn_type = CRIS_INSN_NONE; - out_insnp->imm_oprnd_size = 0; - - /* Find the end of the opcode mnemonic. We assume (true in 2.9.1) - that the caller has translated the opcode to lower-case, up to the - first non-letter. */ - for (operands = insn_text; ISLOWER (*operands); ++operands) - ; - - /* Terminate the opcode after letters, but save the character there if - it was of significance. */ - switch (*operands) - { - case '\0': - break; - - case '.': - /* Put back the modified character later. */ - modified_char = *operands; - /* Fall through. */ - - case ' ': - /* Consume the character after the mnemonic - and replace it with '\0'. */ - *operands++ = '\0'; - break; - - default: - as_bad (_("Unknown opcode: `%s'"), insn_text); - return; - } - - /* Find the instruction. */ - instruction = (struct cris_opcode *) hash_find (op_hash, insn_text); - if (instruction == NULL) - { - as_bad (_("Unknown opcode: `%s'"), insn_text); - return; - } - - /* Put back the modified character. */ - switch (modified_char) - { - case 0: - break; - - default: - *--operands = modified_char; - } - - /* Try to match an opcode table slot. */ - for (s = operands;;) - { - int imm_expr_found; - - /* Initialize *prefixp, perhaps after being modified for a - "near match". */ - prefixp->kind = PREFIX_NONE; - prefixp->reloc = BFD_RELOC_NONE; - - /* Initialize *out_insnp. */ - memset (out_insnp, 0, sizeof (*out_insnp)); - out_insnp->opcode = instruction->match; - out_insnp->reloc = BFD_RELOC_NONE; - out_insnp->insn_type = CRIS_INSN_NORMAL; - out_insnp->imm_oprnd_size = 0; - - imm_expr_found = 0; - - /* Build the opcode, checking as we go to make sure that the - operands match. */ - for (args = instruction->args;; ++args) - { - switch (*args) - { - case '\0': - /* If we've come to the end of arguments, we're done. */ - if (*s == '\0') - match = 1; - break; - - case '!': - /* Non-matcher character for disassembly. - Ignore it here. */ - continue; - - case '[': - case ']': - case ',': - case ' ': - /* These must match exactly. */ - if (*s++ == *args) - continue; - break; - - case 'A': - /* "ACR", case-insensitive. - Handle a sometimes-mandatory dollar sign as register - prefix. */ - if (*s == REGISTER_PREFIX_CHAR) - s++; - else if (demand_register_prefix) - break; - - if ((*s++ != 'a' && s[-1] != 'A') - || (*s++ != 'c' && s[-1] != 'C') - || (*s++ != 'r' && s[-1] != 'R')) - break; - continue; - - case 'B': - /* This is not really an operand, but causes a "BDAP - -size,SP" prefix to be output, for PUSH instructions. */ - prefixp->kind = PREFIX_PUSH; - continue; - - case 'b': - /* This letter marks an operand that should not be matched - in the assembler. It is a branch with 16-bit - displacement. The assembler will create them from the - 8-bit flavor when necessary. The assembler does not - support the [rN+] operand, as the [r15+] that is - generated for 16-bit displacements. */ - break; - - case 'c': - /* A 5-bit unsigned immediate in bits <4:0>. */ - if (! cris_get_expression (&s, &out_insnp->expr)) - break; - else - { - if (out_insnp->expr.X_op == O_constant - && (out_insnp->expr.X_add_number < 0 - || out_insnp->expr.X_add_number > 31)) - as_bad (_("Immediate value not in 5 bit unsigned range: %ld"), - out_insnp->expr.X_add_number); - - out_insnp->reloc = BFD_RELOC_CRIS_UNSIGNED_5; - continue; - } - - case 'C': - /* A 4-bit unsigned immediate in bits <3:0>. */ - if (! cris_get_expression (&s, &out_insnp->expr)) - break; - else - { - if (out_insnp->expr.X_op == O_constant - && (out_insnp->expr.X_add_number < 0 - || out_insnp->expr.X_add_number > 15)) - as_bad (_("Immediate value not in 4 bit unsigned range: %ld"), - out_insnp->expr.X_add_number); - - out_insnp->reloc = BFD_RELOC_CRIS_UNSIGNED_4; - continue; - } - - /* For 'd', check for an optional ".d" or ".D" at the - start of the operands, followed by a space character. */ - case 'd': - if (modified_char == '.' && *s == '.') - { - if ((s[1] != 'd' && s[1] == 'D') - || ! ISSPACE (s[2])) - break; - s += 2; - continue; - } - continue; - - case 'D': - /* General register in bits <15:12> and <3:0>. */ - if (! get_gen_reg (&s, ®no)) - break; - else - { - out_insnp->opcode |= regno /* << 0 */; - out_insnp->opcode |= regno << 12; - continue; - } - - case 'f': - /* Flags from the condition code register. */ - { - int flags = 0; - - if (! get_flags (&s, &flags)) - break; - - out_insnp->opcode |= ((flags & 0xf0) << 8) | (flags & 0xf); - continue; - } - - case 'i': - /* A 6-bit signed immediate in bits <5:0>. */ - if (! cris_get_expression (&s, &out_insnp->expr)) - break; - else - { - if (out_insnp->expr.X_op == O_constant - && (out_insnp->expr.X_add_number < -32 - || out_insnp->expr.X_add_number > 31)) - as_bad (_("Immediate value not in 6 bit range: %ld"), - out_insnp->expr.X_add_number); - out_insnp->reloc = BFD_RELOC_CRIS_SIGNED_6; - continue; - } - - case 'I': - /* A 6-bit unsigned immediate in bits <5:0>. */ - if (! cris_get_expression (&s, &out_insnp->expr)) - break; - else - { - if (out_insnp->expr.X_op == O_constant - && (out_insnp->expr.X_add_number < 0 - || out_insnp->expr.X_add_number > 63)) - as_bad (_("Immediate value not in 6 bit unsigned range: %ld"), - out_insnp->expr.X_add_number); - out_insnp->reloc = BFD_RELOC_CRIS_UNSIGNED_6; - continue; - } - - case 'M': - /* A size modifier, B, W or D, to be put in a bit position - suitable for CLEAR instructions (i.e. reflecting a zero - register). */ - if (! get_bwd_size_modifier (&s, &size_bits)) - break; - else - { - switch (size_bits) - { - case 0: - out_insnp->opcode |= 0 << 12; - break; - - case 1: - out_insnp->opcode |= 4 << 12; - break; - - case 2: - out_insnp->opcode |= 8 << 12; - break; - } - continue; - } - - case 'm': - /* A size modifier, B, W or D, to be put in bits <5:4>. */ - if (modified_char != '.' - || ! get_bwd_size_modifier (&s, &size_bits)) - break; - else - { - out_insnp->opcode |= size_bits << 4; - continue; - } - - case 'o': - /* A branch expression. */ - if (! cris_get_expression (&s, &out_insnp->expr)) - break; - else - { - out_insnp->insn_type = CRIS_INSN_BRANCH; - continue; - } - - case 'Q': - /* A 8-bit quick BDAP expression, "expr,R". */ - if (! cris_get_expression (&s, &out_insnp->expr)) - break; - - if (*s != ',') - break; - - s++; - - if (!get_gen_reg (&s, ®no)) - break; - - out_insnp->opcode |= regno << 12; - out_insnp->reloc = BFD_RELOC_CRIS_SIGNED_8; - continue; - - case 'O': - /* A BDAP expression for any size, "expr,R". */ - if (! cris_get_expression (&s, &prefixp->expr)) - break; - else - { - if (*s != ',') - break; - - s++; - - if (!get_gen_reg (&s, &prefixp->base_reg_number)) - break; - - /* Since 'O' is used with an explicit bdap, we have no - "real" instruction. */ - prefixp->kind = PREFIX_BDAP_IMM; - prefixp->opcode - = BDAP_QUICK_OPCODE | (prefixp->base_reg_number << 12); - - out_insnp->insn_type = CRIS_INSN_NONE; - continue; - } - - case 'P': - /* Special register in bits <15:12>. */ - if (! get_spec_reg (&s, &out_insnp->spec_reg)) - break; - else - { - /* Use of some special register names come with a - specific warning. Note that we have no ".cpu type" - pseudo yet, so some of this is just unused - framework. */ - if (out_insnp->spec_reg->warning) - as_warn (out_insnp->spec_reg->warning); - else if (out_insnp->spec_reg->applicable_version - == cris_ver_warning) - /* Others have a generic warning. */ - as_warn (_("Unimplemented register `%s' specified"), - out_insnp->spec_reg->name); - - out_insnp->opcode - |= out_insnp->spec_reg->number << 12; - continue; - } - - case 'p': - /* This character is used in the disassembler to - recognize a prefix instruction to fold into the - addressing mode for the next instruction. It is - ignored here. */ - continue; - - case 'R': - /* General register in bits <15:12>. */ - if (! get_gen_reg (&s, ®no)) - break; - else - { - out_insnp->opcode |= regno << 12; - continue; - } - - case 'r': - /* General register in bits <3:0>. */ - if (! get_gen_reg (&s, ®no)) - break; - else - { - out_insnp->opcode |= regno /* << 0 */; - continue; - } - - case 'S': - /* Source operand in bit <10> and a prefix; a 3-operand - prefix. */ - if (! get_3op_or_dip_prefix_op (&s, prefixp)) - break; - else - continue; - - case 's': - /* Source operand in bits <10>, <3:0> and optionally a - prefix; i.e. an indirect operand or an side-effect - prefix (where valid). */ - if (! get_autoinc_prefix_or_indir_op (&s, prefixp, &mode, - ®no, - &imm_expr_found, - &out_insnp->expr)) - break; - else - { - if (prefixp->kind != PREFIX_NONE) - { - /* A prefix, so it has the autoincrement bit - set. */ - out_insnp->opcode |= (AUTOINCR_BIT << 8); - } - else - { - /* No prefix. The "mode" variable contains bits like - whether or not this is autoincrement mode. */ - out_insnp->opcode |= (mode << 10); - - /* If there was a PIC reloc specifier, then it was - attached to the prefix. Note that we can't check - that the reloc size matches, since we don't have - all the operands yet in all cases. */ - if (prefixp->reloc != BFD_RELOC_NONE) - out_insnp->reloc = prefixp->reloc; - } - - out_insnp->opcode |= regno /* << 0 */ ; - continue; - } - - case 'N': - case 'Y': - /* Like 's', but immediate operand only. Also does not - modify insn. There are no insns where a PIC reloc - specifier makes sense. */ - if (cris_get_expression (&s, &out_insnp->expr)) - { - imm_expr_found = 1; - continue; - } - break; - - case 'n': - /* Like 'N', but PC-relative to the start of the insn. - There might be a :PLT to request a PLT entry. */ - if (cris_get_expression (&s, &out_insnp->expr)) - { - imm_expr_found = 1; - out_insnp->reloc = BFD_RELOC_32_PCREL; - - /* We have to adjust the expression, because that - relocation is to the location *after* the - relocation. So add 2 for the insn and 4 for the - relocation. */ - out_insnp->expr.X_add_number += 6; - - if (pic && *s == PIC_SUFFIX_CHAR) - cris_get_pic_suffix (&s, &out_insnp->reloc, - &out_insnp->expr); - - continue; - } - break; - - case 'U': - /* Maybe 'u', maybe 'n'. Only for LAPC/LAPCQ. */ - if (cris_get_expression (&s, &out_insnp->expr)) - { - out_insnp->reloc = BFD_RELOC_CRIS_LAPCQ_OFFSET; - - /* Define 1 as relaxing. */ - out_insnp->expr.X_md = 1; - continue; - } - break; - - case 'u': - /* Four PC-relative bits in <3:0> representing <4:1>:0 of - an offset relative to the beginning of the current - insn. */ - if (cris_get_expression (&s, &out_insnp->expr)) - { - out_insnp->reloc = BFD_RELOC_CRIS_LAPCQ_OFFSET; - - /* Define 0 as non-relaxing. */ - out_insnp->expr.X_md = 0; - - /* We have to adjust the expression, because that - relocation is to the location *after* the - insn. So add 2 for the insn. */ - out_insnp->expr.X_add_number += 2; - continue; - } - break; - - case 'x': - /* Rs.m in bits <15:12> and <5:4>. */ - if (! get_gen_reg (&s, ®no) - || ! get_bwd_size_modifier (&s, &size_bits)) - break; - else - { - out_insnp->opcode |= (regno << 12) | (size_bits << 4); - continue; - } - - case 'y': - /* Source operand in bits <10>, <3:0> and optionally a - prefix; i.e. an indirect operand or an side-effect - prefix. - - The difference to 's' is that this does not allow an - "immediate" expression. */ - if (! get_autoinc_prefix_or_indir_op (&s, prefixp, - &mode, ®no, - &imm_expr_found, - &out_insnp->expr) - || imm_expr_found) - break; - else - { - if (prefixp->kind != PREFIX_NONE) - { - /* A prefix, and those matched here always have - side-effects (see 's' case). */ - out_insnp->opcode |= (AUTOINCR_BIT << 8); - } - else - { - /* No prefix. The "mode" variable contains bits - like whether or not this is autoincrement - mode. */ - out_insnp->opcode |= (mode << 10); - } - - out_insnp->opcode |= regno /* << 0 */; - continue; - } - - case 'z': - /* Size modifier (B or W) in bit <4>. */ - if (! get_bw_size_modifier (&s, &size_bits)) - break; - else - { - out_insnp->opcode |= size_bits << 4; - continue; - } - - case 'T': - if (cris_arch == arch_crisv32 - && get_sup_reg (&s, ®no)) - { - out_insnp->opcode |= regno << 12; - continue; - } - break; - - default: - BAD_CASE (*args); - } - - /* We get here when we fail a match above or we found a - complete match. Break out of this loop. */ - break; - } - - /* Was it a match or a miss? */ - if (match == 0) - { - /* If it's just that the args don't match, maybe the next - item in the table is the same opcode but with - matching operands. First skip any invalid ones. */ - while (instruction[1].name != NULL - && strcmp (instruction->name, instruction[1].name) == 0 - && ! cris_insn_ver_valid_for_arch (instruction[1] - .applicable_version, - cris_arch)) - ++instruction; - - if (instruction[1].name != NULL - && strcmp (instruction->name, instruction[1].name) == 0 - && cris_insn_ver_valid_for_arch (instruction[1] - .applicable_version, - cris_arch)) - { - /* Yep. Restart and try that one instead. */ - ++instruction; - s = operands; - continue; - } - else - { - /* We've come to the end of instructions with this - opcode, so it must be an error. */ - as_bad (_("Illegal operands")); - - /* As discard_rest_of_line, but without continuing to the - next line. */ - while (!is_end_of_line[(unsigned char) *input_line_pointer]) - input_line_pointer++; - return; - } - } - else - { - /* We have a match. Check if there's anything more to do. */ - if (imm_expr_found) - { - /* There was an immediate mode operand, so we must check - that it has an appropriate size. */ - switch (instruction->imm_oprnd_size) - { - default: - case SIZE_NONE: - /* Shouldn't happen; this one does not have immediate - operands with different sizes. */ - BAD_CASE (instruction->imm_oprnd_size); - break; - - case SIZE_FIX_32: - out_insnp->imm_oprnd_size = 4; - break; - - case SIZE_SPEC_REG: - if (cris_arch == arch_crisv32) - /* All immediate loads of special registers are - 32-bit on CRISv32. */ - out_insnp->imm_oprnd_size = 4; - else - switch (out_insnp->spec_reg->reg_size) - { - case 1: - if (out_insnp->expr.X_op == O_constant - && (out_insnp->expr.X_add_number < -128 - || out_insnp->expr.X_add_number > 255)) - as_bad (_("Immediate value not in 8 bit range: %ld"), - out_insnp->expr.X_add_number); - /* Fall through. */ - case 2: - /* FIXME: We need an indicator in the instruction - table to pass on, to indicate if we need to check - overflow for a signed or unsigned number. */ - if (out_insnp->expr.X_op == O_constant - && (out_insnp->expr.X_add_number < -32768 - || out_insnp->expr.X_add_number > 65535)) - as_bad (_("Immediate value not in 16 bit range: %ld"), - out_insnp->expr.X_add_number); - out_insnp->imm_oprnd_size = 2; - break; - - case 4: - out_insnp->imm_oprnd_size = 4; - break; - - default: - BAD_CASE (out_insnp->spec_reg->reg_size); - } - break; - - case SIZE_FIELD: - case SIZE_FIELD_SIGNED: - case SIZE_FIELD_UNSIGNED: - switch (size_bits) - { - /* FIXME: Find way to pass un/signedness to - caller, and set reloc type instead, postponing - this check until cris_number_to_imm. That - necessarily corrects the reloc type for the - byte case, maybe requiring further changes. */ - case 0: - if (out_insnp->expr.X_op == O_constant) - { - if (instruction->imm_oprnd_size == SIZE_FIELD - && (out_insnp->expr.X_add_number < -128 - || out_insnp->expr.X_add_number > 255)) - as_bad (_("Immediate value not in 8 bit range: %ld"), - out_insnp->expr.X_add_number); - else if (instruction->imm_oprnd_size == SIZE_FIELD_SIGNED - && (out_insnp->expr.X_add_number < -128 - || out_insnp->expr.X_add_number > 127)) - as_bad (_("Immediate value not in 8 bit signed range: %ld"), - out_insnp->expr.X_add_number); - else if (instruction->imm_oprnd_size == SIZE_FIELD_UNSIGNED - && (out_insnp->expr.X_add_number < 0 - || out_insnp->expr.X_add_number > 255)) - as_bad (_("Immediate value not in 8 bit unsigned range: %ld"), - out_insnp->expr.X_add_number); - } - - /* Fall through. */ - case 1: - if (out_insnp->expr.X_op == O_constant) - { - if (instruction->imm_oprnd_size == SIZE_FIELD - && (out_insnp->expr.X_add_number < -32768 - || out_insnp->expr.X_add_number > 65535)) - as_bad (_("Immediate value not in 16 bit range: %ld"), - out_insnp->expr.X_add_number); - else if (instruction->imm_oprnd_size == SIZE_FIELD_SIGNED - && (out_insnp->expr.X_add_number < -32768 - || out_insnp->expr.X_add_number > 32767)) - as_bad (_("Immediate value not in 16 bit signed range: %ld"), - out_insnp->expr.X_add_number); - else if (instruction->imm_oprnd_size == SIZE_FIELD_UNSIGNED - && (out_insnp->expr.X_add_number < 0 - || out_insnp->expr.X_add_number > 65535)) - as_bad (_("Immediate value not in 16 bit unsigned range: %ld"), - out_insnp->expr.X_add_number); - } - out_insnp->imm_oprnd_size = 2; - break; - - case 2: - out_insnp->imm_oprnd_size = 4; - break; - - default: - BAD_CASE (out_insnp->spec_reg->reg_size); - } - } - - /* If there was a relocation specified for the immediate - expression (i.e. it had a PIC modifier) check that the - size of the PIC relocation matches the size specified by - the opcode. */ - if (out_insnp->reloc != BFD_RELOC_NONE - && (cris_get_pic_reloc_size (out_insnp->reloc) - != (unsigned int) out_insnp->imm_oprnd_size)) - as_bad (_("PIC relocation size does not match operand size")); - } - else if (instruction->op == cris_muls_op - || instruction->op == cris_mulu_op) - out_insnp->insn_type = CRIS_INSN_MUL; - } - break; - } -} - -/* Get a B, W, or D size modifier from the string pointed out by *cPP, - which must point to a '.' in front of the modifier. On successful - return, *cPP is advanced to the character following the size - modifier, and is undefined otherwise. - - cPP Pointer to pointer to string starting - with the size modifier. - - size_bitsp Pointer to variable to contain the size bits on - successful return. - - Return 1 iff a correct size modifier is found, else 0. */ - -static int -get_bwd_size_modifier (char **cPP, int *size_bitsp) -{ - if (**cPP != '.') - return 0; - else - { - /* Consume the '.'. */ - (*cPP)++; - - switch (**cPP) - { - case 'B': - case 'b': - *size_bitsp = 0; - break; - - case 'W': - case 'w': - *size_bitsp = 1; - break; - - case 'D': - case 'd': - *size_bitsp = 2; - break; - - default: - return 0; - } - - /* Consume the size letter. */ - (*cPP)++; - return 1; - } -} - -/* Get a B or W size modifier from the string pointed out by *cPP, - which must point to a '.' in front of the modifier. On successful - return, *cPP is advanced to the character following the size - modifier, and is undefined otherwise. - - cPP Pointer to pointer to string starting - with the size modifier. - - size_bitsp Pointer to variable to contain the size bits on - successful return. - - Return 1 iff a correct size modifier is found, else 0. */ - -static int -get_bw_size_modifier (char **cPP, int *size_bitsp) -{ - if (**cPP != '.') - return 0; - else - { - /* Consume the '.'. */ - (*cPP)++; - - switch (**cPP) - { - case 'B': - case 'b': - *size_bitsp = 0; - break; - - case 'W': - case 'w': - *size_bitsp = 1; - break; - - default: - return 0; - } - - /* Consume the size letter. */ - (*cPP)++; - return 1; - } -} - -/* Get a general register from the string pointed out by *cPP. The - variable *cPP is advanced to the character following the general - register name on a successful return, and has its initial position - otherwise. - - cPP Pointer to pointer to string, beginning with a general - register name. - - regnop Pointer to int containing the register number. - - Return 1 iff a correct general register designator is found, - else 0. */ - -static int -get_gen_reg (char **cPP, int *regnop) -{ - char *oldp; - oldp = *cPP; - - /* Handle a sometimes-mandatory dollar sign as register prefix. */ - if (**cPP == REGISTER_PREFIX_CHAR) - (*cPP)++; - else if (demand_register_prefix) - return 0; - - switch (**cPP) - { - case 'P': - case 'p': - /* "P" as in "PC"? Consume the "P". */ - (*cPP)++; - - if ((**cPP == 'C' || **cPP == 'c') - && ! ISALNUM ((*cPP)[1]) - /* Here's a little twist: For v32 and the compatibility mode, - we only recognize PC as a register number if there's '+]' - after. We don't consume that, but the presence can only be - valid after a register in a post-increment context, which - is also the only valid context for PC as a register for - v32. Not that it's used very often, but saying "MOVE.D - [PC+],R5" should remain valid. It's not supported for - jump-type insns or other insns with no [Rn+] mode, though. */ - && ((cris_arch != arch_crisv32 - && cris_arch != arch_cris_common_v10_v32) - || ((*cPP)[1] == '+' && (*cPP)[2] == ']'))) - { - /* It's "PC": consume the "c" and we're done. */ - (*cPP)++; - *regnop = REG_PC; - return 1; - } - break; - - /* Like with PC, we recognize ACR, but only if it's *not* followed - by '+', and only for v32. */ - case 'A': - case 'a': - if (cris_arch != arch_crisv32 - || ((*cPP)[1] != 'c' && (*cPP)[1] != 'C') - || ((*cPP)[2] != 'r' && (*cPP)[2] != 'R') - || ISALNUM ((*cPP)[3]) - || (*cPP)[3] == '+') - break; - (*cPP) += 3; - *regnop = 15; - return 1; - - case 'R': - case 'r': - /* Hopefully r[0-9] or r1[0-5]. Consume 'R' or 'r'. */ - (*cPP)++; - - if (ISDIGIT (**cPP)) - { - /* It's r[0-9]. Consume and check the next digit. */ - *regnop = **cPP - '0'; - (*cPP)++; - - if (! ISALNUM (**cPP)) - { - /* No more digits, we're done. */ - return 1; - } - else - { - /* One more digit. Consume and add. */ - *regnop = *regnop * 10 + (**cPP - '0'); - - /* We need to check for a valid register number; Rn, - 0 <= n <= MAX_REG. */ - if (*regnop <= MAX_REG) - { - /* Consume second digit. */ - (*cPP)++; - return 1; - } - } - } - break; - - case 'S': - case 's': - /* "S" as in "SP"? Consume the "S". */ - (*cPP)++; - if (**cPP == 'P' || **cPP == 'p') - { - /* It's "SP": consume the "p" and we're done. */ - (*cPP)++; - *regnop = REG_SP; - return 1; - } - break; - - default: - /* Just here to silence compilation warnings. */ - ; - } - - /* We get here if we fail. Restore the pointer. */ - *cPP = oldp; - return 0; -} - -/* Get a special register from the string pointed out by *cPP. The - variable *cPP is advanced to the character following the special - register name if one is found, and retains its original position - otherwise. - - cPP Pointer to pointer to string starting with a special register - name. - - sregpp Pointer to Pointer to struct spec_reg, where a pointer to the - register description will be stored. - - Return 1 iff a correct special register name is found. */ - -static int -get_spec_reg (char **cPP, const struct cris_spec_reg **sregpp) -{ - char *s1; - const char *s2; - char *name_begin = *cPP; - - const struct cris_spec_reg *sregp; - - /* Handle a sometimes-mandatory dollar sign as register prefix. */ - if (*name_begin == REGISTER_PREFIX_CHAR) - name_begin++; - else if (demand_register_prefix) - return 0; - - /* Loop over all special registers. */ - for (sregp = cris_spec_regs; sregp->name != NULL; sregp++) - { - /* Start over from beginning of the supposed name. */ - s1 = name_begin; - s2 = sregp->name; - - while (*s2 != '\0' && TOLOWER (*s1) == *s2) - { - s1++; - s2++; - } - - /* For a match, we must have consumed the name in the table, and we - must be outside what could be part of a name. Assume here that a - test for alphanumerics is sufficient for a name test. */ - if (*s2 == 0 && ! ISALNUM (*s1) - && cris_insn_ver_valid_for_arch (sregp->applicable_version, - cris_arch)) - { - /* We have a match. Update the pointer and be done. */ - *cPP = s1; - *sregpp = sregp; - return 1; - } - } - - /* If we got here, we did not find any name. */ - return 0; -} - -/* Get a support register from the string pointed out by *cPP. The - variable *cPP is advanced to the character following the support- - register name if one is found, and retains its original position - otherwise. - - cPP Pointer to pointer to string starting with a support-register - name. - - sregpp Pointer to int containing the register number. - - Return 1 iff a correct support-register name is found. */ - -static int -get_sup_reg (char **cPP, int *regnop) -{ - char *s1; - const char *s2; - char *name_begin = *cPP; - - const struct cris_support_reg *sregp; - - /* Handle a sometimes-mandatory dollar sign as register prefix. */ - if (*name_begin == REGISTER_PREFIX_CHAR) - name_begin++; - else if (demand_register_prefix) - return 0; - - /* Loop over all support-registers. */ - for (sregp = cris_support_regs; sregp->name != NULL; sregp++) - { - /* Start over from beginning of the supposed name. */ - s1 = name_begin; - s2 = sregp->name; - - while (*s2 != '\0' && TOLOWER (*s1) == *s2) - { - s1++; - s2++; - } - - /* For a match, we must have consumed the name in the table, and we - must be outside what could be part of a name. Assume here that a - test for alphanumerics is sufficient for a name test. */ - if (*s2 == 0 && ! ISALNUM (*s1)) - { - /* We have a match. Update the pointer and be done. */ - *cPP = s1; - *regnop = sregp->number; - return 1; - } - } - - /* If we got here, we did not find any name. */ - return 0; -} - -/* Get an unprefixed or side-effect-prefix operand from the string pointed - out by *cPP. The pointer *cPP is advanced to the character following - the indirect operand if we have success, else it contains an undefined - value. - - cPP Pointer to pointer to string beginning with the first - character of the supposed operand. - - prefixp Pointer to structure containing an optional instruction - prefix. - - is_autoincp Pointer to int indicating the indirect or autoincrement - bits. - - src_regnop Pointer to int containing the source register number in - the instruction. - - imm_foundp Pointer to an int indicating if an immediate expression - is found. - - imm_exprP Pointer to a structure containing an immediate - expression, if success and if *imm_foundp is nonzero. - - Return 1 iff a correct indirect operand is found. */ - -static int -get_autoinc_prefix_or_indir_op (char **cPP, struct cris_prefix *prefixp, - int *is_autoincp, int *src_regnop, - int *imm_foundp, expressionS *imm_exprP) -{ - /* Assume there was no immediate mode expression. */ - *imm_foundp = 0; - - if (**cPP == '[') - { - /* So this operand is one of: - Indirect: [rN] - Autoincrement: [rN+] - Indexed with assign: [rN=rM+rO.S] - Offset with assign: [rN=rM+I], [rN=rM+[rO].s], [rN=rM+[rO+].s] - - Either way, consume the '['. */ - (*cPP)++; - - /* Get the rN register. */ - if (! get_gen_reg (cPP, src_regnop)) - /* If there was no register, then this cannot match. */ - return 0; - else - { - /* We got the register, now check the next character. */ - switch (**cPP) - { - case ']': - /* Indirect mode. We're done here. */ - prefixp->kind = PREFIX_NONE; - *is_autoincp = 0; - break; - - case '+': - /* This must be an auto-increment mode, if there's a - match. */ - prefixp->kind = PREFIX_NONE; - *is_autoincp = 1; - - /* We consume this character and break out to check the - closing ']'. */ - (*cPP)++; - break; - - case '=': - /* This must be indexed with assign, or offset with assign - to match. Not supported for crisv32 or in - compatibility mode. */ - if (cris_arch == arch_crisv32 - || cris_arch == arch_cris_common_v10_v32) - return 0; - - (*cPP)++; - - /* Either way, the next thing must be a register. */ - if (! get_gen_reg (cPP, &prefixp->base_reg_number)) - /* No register, no match. */ - return 0; - else - { - /* We've consumed "[rN=rM", so we must be looking at - "+rO.s]" or "+I]", or "-I]", or "+[rO].s]" or - "+[rO+].s]". */ - if (**cPP == '+') - { - int index_reg_number; - (*cPP)++; - - if (**cPP == '[') - { - int size_bits; - /* This must be [rx=ry+[rz].s] or - [rx=ry+[rz+].s] or no match. We must be - looking at rz after consuming the '['. */ - (*cPP)++; - - if (!get_gen_reg (cPP, &index_reg_number)) - return 0; - - prefixp->kind = PREFIX_BDAP; - prefixp->opcode - = (BDAP_INDIR_OPCODE - + (prefixp->base_reg_number << 12) - + index_reg_number); - - if (**cPP == '+') - { - /* We've seen "[rx=ry+[rz+" here, so now we - know that there must be "].s]" left to - check. */ - (*cPP)++; - prefixp->opcode |= AUTOINCR_BIT << 8; - } - - /* If it wasn't autoincrement, we don't need to - add anything. */ - - /* Check the next-to-last ']'. */ - if (**cPP != ']') - return 0; - - (*cPP)++; - - /* Check the ".s" modifier. */ - if (! get_bwd_size_modifier (cPP, &size_bits)) - return 0; - - prefixp->opcode |= size_bits << 4; - - /* Now we got [rx=ry+[rz+].s or [rx=ry+[rz].s. - We break out to check the final ']'. */ - break; - } - /* It wasn't an indirection. Check if it's a - register. */ - else if (get_gen_reg (cPP, &index_reg_number)) - { - int size_bits; - - /* Indexed with assign mode: "[rN+rM.S]". */ - prefixp->kind = PREFIX_BIAP; - prefixp->opcode - = (BIAP_OPCODE + (index_reg_number << 12) - + prefixp->base_reg_number /* << 0 */); - - if (! get_bwd_size_modifier (cPP, &size_bits)) - /* Size missing, this isn't a match. */ - return 0; - else - { - /* Size found, break out to check the - final ']'. */ - prefixp->opcode |= size_bits << 4; - break; - } - } - /* Not a register. Then this must be "[rN+I]". */ - else if (cris_get_expression (cPP, &prefixp->expr)) - { - /* We've got offset with assign mode. Fill - in the blanks and break out to match the - final ']'. */ - prefixp->kind = PREFIX_BDAP_IMM; - - /* We tentatively put an opcode corresponding to - a 32-bit operand here, although it may be - relaxed when there's no PIC specifier for the - operand. */ - prefixp->opcode - = (BDAP_INDIR_OPCODE - | (prefixp->base_reg_number << 12) - | (AUTOINCR_BIT << 8) - | (2 << 4) - | REG_PC /* << 0 */); - - /* This can have a PIC suffix, specifying reloc - type to use. */ - if (pic && **cPP == PIC_SUFFIX_CHAR) - { - unsigned int relocsize; - - cris_get_pic_suffix (cPP, &prefixp->reloc, - &prefixp->expr); - - /* Tweak the size of the immediate operand - in the prefix opcode if it isn't what we - set. */ - relocsize - = cris_get_pic_reloc_size (prefixp->reloc); - if (relocsize != 4) - prefixp->opcode - = ((prefixp->opcode & ~(3 << 4)) - | ((relocsize >> 1) << 4)); - } - break; - } - else - /* Neither register nor expression found, so - this can't be a match. */ - return 0; - } - /* Not "[rN+" but perhaps "[rN-"? */ - else if (**cPP == '-') - { - /* We must have an offset with assign mode. */ - if (! cris_get_expression (cPP, &prefixp->expr)) - /* No expression, no match. */ - return 0; - else - { - /* We've got offset with assign mode. Fill - in the blanks and break out to match the - final ']'. - - Note that we don't allow a PIC suffix for an - operand with a minus sign. */ - prefixp->kind = PREFIX_BDAP_IMM; - break; - } - } - else - /* Neither '+' nor '-' after "[rN=rM". Lose. */ - return 0; - } - default: - /* Neither ']' nor '+' nor '=' after "[rN". Lose. */ - return 0; - } - } - - /* When we get here, we have a match and will just check the closing - ']'. We can still fail though. */ - if (**cPP != ']') - return 0; - else - { - /* Don't forget to consume the final ']'. - Then return in glory. */ - (*cPP)++; - return 1; - } - } - /* No indirection. Perhaps a constant? */ - else if (cris_get_expression (cPP, imm_exprP)) - { - /* Expression found, this is immediate mode. */ - prefixp->kind = PREFIX_NONE; - *is_autoincp = 1; - *src_regnop = REG_PC; - *imm_foundp = 1; - - /* This can have a PIC suffix, specifying reloc type to use. The - caller must check that the reloc size matches the operand size. */ - if (pic && **cPP == PIC_SUFFIX_CHAR) - cris_get_pic_suffix (cPP, &prefixp->reloc, imm_exprP); - - return 1; - } - - /* No luck today. */ - return 0; -} - -/* This function gets an indirect operand in a three-address operand - combination from the string pointed out by *cPP. The pointer *cPP is - advanced to the character following the indirect operand on success, or - has an unspecified value on failure. - - cPP Pointer to pointer to string beginning - with the operand - - prefixp Pointer to structure containing an - instruction prefix - - Returns 1 iff a correct indirect operand is found. */ - -static int -get_3op_or_dip_prefix_op (char **cPP, struct cris_prefix *prefixp) -{ - int reg_number; - - if (**cPP != '[') - /* We must have a '[' or it's a clean failure. */ - return 0; - - /* Eat the first '['. */ - (*cPP)++; - - if (**cPP == '[') - { - /* A second '[', so this must be double-indirect mode. */ - (*cPP)++; - prefixp->kind = PREFIX_DIP; - prefixp->opcode = DIP_OPCODE; - - /* Get the register or fail entirely. */ - if (! get_gen_reg (cPP, ®_number)) - return 0; - else - { - prefixp->opcode |= reg_number /* << 0 */ ; - if (**cPP == '+') - { - /* Since we found a '+', this must be double-indirect - autoincrement mode. */ - (*cPP)++; - prefixp->opcode |= AUTOINCR_BIT << 8; - } - - /* There's nothing particular to do, if this was a - double-indirect *without* autoincrement. */ - } - - /* Check the first ']'. The second one is checked at the end. */ - if (**cPP != ']') - return 0; - - /* Eat the first ']', so we'll be looking at a second ']'. */ - (*cPP)++; - } - /* No second '['. Then we should have a register here, making - it "[rN". */ - else if (get_gen_reg (cPP, &prefixp->base_reg_number)) - { - /* This must be indexed or offset mode: "[rN+I]" or - "[rN+rM.S]" or "[rN+[rM].S]" or "[rN+[rM+].S]". */ - if (**cPP == '+') - { - int index_reg_number; - - (*cPP)++; - - if (**cPP == '[') - { - /* This is "[rx+["... Expect a register next. */ - int size_bits; - (*cPP)++; - - if (!get_gen_reg (cPP, &index_reg_number)) - return 0; - - prefixp->kind = PREFIX_BDAP; - prefixp->opcode - = (BDAP_INDIR_OPCODE - + (prefixp->base_reg_number << 12) - + index_reg_number); - - /* We've seen "[rx+[ry", so check if this is - autoincrement. */ - if (**cPP == '+') - { - /* Yep, now at "[rx+[ry+". */ - (*cPP)++; - prefixp->opcode |= AUTOINCR_BIT << 8; - } - /* If it wasn't autoincrement, we don't need to - add anything. */ - - /* Check a first closing ']': "[rx+[ry]" or - "[rx+[ry+]". */ - if (**cPP != ']') - return 0; - (*cPP)++; - - /* Now expect a size modifier ".S". */ - if (! get_bwd_size_modifier (cPP, &size_bits)) - return 0; - - prefixp->opcode |= size_bits << 4; - - /* Ok, all interesting stuff has been seen: - "[rx+[ry+].S" or "[rx+[ry].S". We only need to - expect a final ']', which we'll do in a common - closing session. */ - } - /* Seen "[rN+", but not a '[', so check if we have a - register. */ - else if (get_gen_reg (cPP, &index_reg_number)) - { - /* This is indexed mode: "[rN+rM.S]" or - "[rN+rM.S+]". */ - int size_bits; - prefixp->kind = PREFIX_BIAP; - prefixp->opcode - = (BIAP_OPCODE - | prefixp->base_reg_number /* << 0 */ - | (index_reg_number << 12)); - - /* Consume the ".S". */ - if (! get_bwd_size_modifier (cPP, &size_bits)) - /* Missing size, so fail. */ - return 0; - else - /* Size found. Add that piece and drop down to - the common checking of the closing ']'. */ - prefixp->opcode |= size_bits << 4; - } - /* Seen "[rN+", but not a '[' or a register, so then - it must be a constant "I". - - As a quality of implementation improvement, we check for a - closing ']', like in an erroneous "[rN+]". If we don't, - the expression parser will emit a confusing "bad - expression" when it sees the ']', probably because it - doesn't like seeing no expression. */ - else if (**cPP != ']' && cris_get_expression (cPP, &prefixp->expr)) - { - /* Expression found, so fill in the bits of offset - mode and drop down to check the closing ']'. */ - prefixp->kind = PREFIX_BDAP_IMM; - - /* We tentatively put an opcode corresponding to a 32-bit - operand here, although it may be relaxed when there's no - PIC specifier for the operand. */ - prefixp->opcode - = (BDAP_INDIR_OPCODE - | (prefixp->base_reg_number << 12) - | (AUTOINCR_BIT << 8) - | (2 << 4) - | REG_PC /* << 0 */); - - /* This can have a PIC suffix, specifying reloc type to use. */ - if (pic && **cPP == PIC_SUFFIX_CHAR) - { - unsigned int relocsize; - - cris_get_pic_suffix (cPP, &prefixp->reloc, &prefixp->expr); - - /* Tweak the size of the immediate operand in the prefix - opcode if it isn't what we set. */ - relocsize = cris_get_pic_reloc_size (prefixp->reloc); - if (relocsize != 4) - prefixp->opcode - = ((prefixp->opcode & ~(3 << 4)) - | ((relocsize >> 1) << 4)); - } - } - else - /* Nothing valid here: lose. */ - return 0; - } - /* Seen "[rN" but no '+', so check if it's a '-'. */ - else if (**cPP == '-') - { - /* Yep, we must have offset mode. */ - if (! cris_get_expression (cPP, &prefixp->expr)) - /* No expression, so we lose. */ - return 0; - else - { - /* Expression found to make this offset mode, so - fill those bits and drop down to check the - closing ']'. - - Note that we don't allow a PIC suffix for - an operand with a minus sign like this. */ - prefixp->kind = PREFIX_BDAP_IMM; - } - } - else - { - /* We've seen "[rN", but not '+' or '-'; rather a ']'. - Hmm. Normally this is a simple indirect mode that we - shouldn't match, but if we expect ']', then we have a - zero offset, so it can be a three-address-operand, - like "[rN],rO,rP", thus offset mode. - - Don't eat the ']', that will be done in the closing - ceremony. */ - prefixp->expr.X_op = O_constant; - prefixp->expr.X_add_number = 0; - prefixp->expr.X_add_symbol = NULL; - prefixp->expr.X_op_symbol = NULL; - prefixp->kind = PREFIX_BDAP_IMM; - } - } - /* A '[', but no second '[', and no register. Check if we - have an expression, making this "[I]" for a double-indirect - prefix. */ - else if (cris_get_expression (cPP, &prefixp->expr)) - { - /* Expression found, the so called absolute mode for a - double-indirect prefix on PC. */ - prefixp->kind = PREFIX_DIP; - prefixp->opcode = DIP_OPCODE | (AUTOINCR_BIT << 8) | REG_PC; - prefixp->reloc = BFD_RELOC_32; - } - else - /* Neither '[' nor register nor expression. We lose. */ - return 0; - - /* We get here as a closing ceremony to a successful match. We just - need to check the closing ']'. */ - if (**cPP != ']') - /* Oops. Close but no air-polluter. */ - return 0; - - /* Don't forget to consume that ']', before returning in glory. */ - (*cPP)++; - return 1; -} - -/* Get an expression from the string pointed out by *cPP. - The pointer *cPP is advanced to the character following the expression - on a success, or retains its original value otherwise. - - cPP Pointer to pointer to string beginning with the expression. - - exprP Pointer to structure containing the expression. - - Return 1 iff a correct expression is found. */ - -static int -cris_get_expression (char **cPP, expressionS *exprP) -{ - char *saved_input_line_pointer; - segT exp; - - /* The "expression" function expects to find an expression at the - global variable input_line_pointer, so we have to save it to give - the impression that we don't fiddle with global variables. */ - saved_input_line_pointer = input_line_pointer; - input_line_pointer = *cPP; - - /* Avoid a common error, confusing addressing modes. Beware that the - call to expression below does not signal that error; it treats [] - as parentheses, unless #define NEED_INDEX_OPERATOR in which case it - gives them other confusing semantics rather than plain outlawing - them, which is what we want. */ - if (*input_line_pointer == '[') - { - input_line_pointer = saved_input_line_pointer; - return 0; - } - - exp = expression (exprP); - if (exprP->X_op == O_illegal || exprP->X_op == O_absent) - { - input_line_pointer = saved_input_line_pointer; - return 0; - } - - /* Everything seems to be fine, just restore the global - input_line_pointer and say we're successful. */ - *cPP = input_line_pointer; - input_line_pointer = saved_input_line_pointer; - return 1; -} - -/* Get a sequence of flag characters from *spp. The pointer *cPP is - advanced to the character following the expression. The flag - characters are consecutive, no commas or spaces. - - cPP Pointer to pointer to string beginning with the expression. - - flagp Pointer to int to return the flags expression. - - Return 1 iff a correct flags expression is found. */ - -static int -get_flags (char **cPP, int *flagsp) -{ - for (;;) - { - switch (**cPP) - { - case 'd': - case 'D': - if (! cris_insn_ver_valid_for_arch (cris_ver_v0_3, - cris_arch)) - return 0; - *flagsp |= 0x80; - break; - - case 'm': - case 'M': - if (! cris_insn_ver_valid_for_arch (cris_ver_v8_10, - cris_arch)) - return 0; - *flagsp |= 0x80; - break; - - case 'e': - case 'E': - if (! cris_insn_ver_valid_for_arch (cris_ver_v0_3, - cris_arch)) - return 0; - *flagsp |= 0x40; - break; - - case 'b': - case 'B': - if (! cris_insn_ver_valid_for_arch (cris_ver_v8_10, - cris_arch)) - return 0; - *flagsp |= 0x40; - break; - - case 'p': - case 'P': - if (! cris_insn_ver_valid_for_arch (cris_ver_v32p, - cris_arch)) - return 0; - *flagsp |= 0x80; - break; - - case 'u': - case 'U': - if (! cris_insn_ver_valid_for_arch (cris_ver_v32p, - cris_arch)) - return 0; - *flagsp |= 0x40; - break; - - case 'i': - case 'I': - *flagsp |= 0x20; - break; - - case 'x': - case 'X': - *flagsp |= 0x10; - break; - - case 'n': - case 'N': - *flagsp |= 0x8; - break; - - case 'z': - case 'Z': - *flagsp |= 0x4; - break; - - case 'v': - case 'V': - *flagsp |= 0x2; - break; - - case 'c': - case 'C': - *flagsp |= 1; - break; - - default: - /* We consider this successful if we stop at a comma or - whitespace. Anything else, and we consider it a failure. */ - if (**cPP != ',' - && **cPP != 0 - && ! ISSPACE (**cPP)) - return 0; - else - return 1; - } - - /* Don't forget to consume each flag character. */ - (*cPP)++; - } -} - -/* Generate code and fixes for a BDAP prefix. - For v32, this handles ADDOQ because thankfully the opcodes are the - same. - - base_regno Int containing the base register number. - - exprP Pointer to structure containing the offset expression. */ - -static void -gen_bdap (int base_regno, expressionS *exprP) -{ - unsigned int opcode; - char *opcodep; - - /* Put out the prefix opcode; assume quick immediate mode at first. */ - opcode = BDAP_QUICK_OPCODE | (base_regno << 12); - opcodep = cris_insn_first_word_frag (); - md_number_to_chars (opcodep, opcode, 2); - - if (exprP->X_op == O_constant) - { - /* We have an absolute expression that we know the size of right - now. */ - long int value; - int size; - - value = exprP->X_add_number; - if (value < -32768 || value > 32767) - /* Outside range for a "word", make it a dword. */ - size = 2; - else - /* Assume "word" size. */ - size = 1; - - /* If this is a signed-byte value, we can fit it into the prefix - insn itself. */ - if (value >= -128 && value <= 127) - opcodep[0] = value; - else - { - /* This is a word or dword displacement, which will be put in a - word or dword after the prefix. */ - char *p; - - opcodep[0] = BDAP_PC_LOW + (size << 4); - opcodep[1] &= 0xF0; - opcodep[1] |= BDAP_INCR_HIGH; - p = frag_more (1 << size); - md_number_to_chars (p, value, 1 << size); - } - } - else - { - /* Handle complex expressions. */ - valueT addvalue - = SIMPLE_EXPR (exprP) ? exprP->X_add_number : 0; - symbolS *sym - = (SIMPLE_EXPR (exprP) - ? exprP->X_add_symbol : make_expr_symbol (exprP)); - - /* The expression is not defined yet but may become absolute. We - make it a relocation to be relaxed. */ - frag_var (rs_machine_dependent, 4, 0, - ENCODE_RELAX (STATE_BASE_PLUS_DISP_PREFIX, STATE_UNDF), - sym, addvalue, opcodep); - } -} - -/* Encode a branch displacement in the range -256..254 into the form used - by CRIS conditional branch instructions. - - offset The displacement value in bytes. */ - -static int -branch_disp (int offset) -{ - int disp; - - /* Adjust all short branch offsets here. */ - if (cris_arch == arch_crisv32 || cris_arch == arch_cris_common_v10_v32) - offset += 2; - - disp = offset & 0xFE; - - if (offset < 0) - disp |= 1; - - return disp; -} - -/* Generate code and fixes for a 32-bit conditional branch instruction - created by "extending" an existing 8-bit branch instruction. - - opcodep Pointer to the word containing the original 8-bit branch - instruction. - - writep Pointer to "extension area" following the first instruction - word. - - fragP Pointer to the frag containing the instruction. - - add_symP, Parts of the destination address expression. - sub_symP, - add_num. */ - -static void -gen_cond_branch_32 (char *opcodep, char *writep, fragS *fragP, - symbolS *add_symP, symbolS *sub_symP, long int add_num) -{ - int nop_opcode; - int opc_offset; - int branch_offset; - - if (cris_arch == arch_crisv32) - { - nop_opcode = NOP_OPCODE_V32; - opc_offset = 10; - branch_offset = -2 - 8; - } - else if (pic) - { - nop_opcode = NOP_OPCODE; - opc_offset = 10; - branch_offset = -2 - 8; - } - else - { - nop_opcode = NOP_OPCODE; - opc_offset = 8; - branch_offset = -2 - 6; - } - - /* We should never get here for compatibility mode. */ - if (cris_arch == arch_cris_common_v10_v32) - as_fatal (_("Calling gen_cond_branch_32 for .arch common_v10_v32\n")); - - if (warn_for_branch_expansion) - as_warn_where (fragP->fr_file, fragP->fr_line, - _("32-bit conditional branch generated")); - - /* Here, writep points to what will be opcodep + 2. First, we change - the actual branch in opcodep[0] and opcodep[1], so that in the - final insn, it will look like: - opcodep+10: Bcc .-6 - - This means we don't have to worry about changing the opcode or - messing with the delay-slot instruction. So, we move it to last in - the "extended" branch, and just change the displacement. Admittedly, - it's not the optimal extended construct, but we should get this - rarely enough that it shouldn't matter. */ - - writep[opc_offset] = branch_disp (branch_offset); - writep[opc_offset + 1] = opcodep[1]; - - /* Then, we change the branch to an unconditional branch over the - extended part, to the new location of the Bcc: - opcodep: BA .+10 - opcodep+2: NOP - - Note that these two writes are to currently different locations, - merged later. */ - - md_number_to_chars (opcodep, BA_QUICK_OPCODE - + (cris_arch == arch_crisv32 ? 12 : (pic ? 10 : 8)), - 2); - md_number_to_chars (writep, nop_opcode, 2); - - /* Then the extended thing, the 32-bit jump insn. - opcodep+4: JUMP [PC+] - or, in the PIC case, - opcodep+4: MOVE [PC=PC+N],P0. */ - - md_number_to_chars (writep + 2, - cris_arch == arch_crisv32 - ? BA_DWORD_OPCODE - : (pic ? MOVE_PC_INCR_OPCODE_PREFIX - : JUMP_PC_INCR_OPCODE), 2); - - /* We have to fill in the actual value too. - opcodep+6: .DWORD - This is most probably an expression, but we can cope with an absolute - value too. FIXME: Testcase needed with and without pic. */ - - if (add_symP == NULL && sub_symP == NULL) - { - /* An absolute address. */ - if (pic || cris_arch == arch_crisv32) - fix_new (fragP, writep + 4 - fragP->fr_literal, 4, - section_symbol (absolute_section), - add_num - + (cris_arch == arch_crisv32 ? 6 : 0), - 1, BFD_RELOC_32_PCREL); - else - md_number_to_chars (writep + 4, add_num, 4); - } - else - { - if (sub_symP != NULL) - as_bad_where (fragP->fr_file, fragP->fr_line, - _("Complex expression not supported")); - - /* Not absolute, we have to make it a frag for later evaluation. */ - fix_new (fragP, writep + 4 - fragP->fr_literal, 4, add_symP, - add_num + (cris_arch == arch_crisv32 ? 6 : 0), - pic || cris_arch == arch_crisv32 ? 1 : 0, - pic || cris_arch == arch_crisv32 - ? BFD_RELOC_32_PCREL : BFD_RELOC_32); - } - - if (cris_arch == arch_crisv32) - /* Follow it with a "NOP" for CRISv32. */ - md_number_to_chars (writep + 8, NOP_OPCODE_V32, 2); - else if (pic) - /* ...and the rest of the move-opcode for pre-v32 PIC. */ - md_number_to_chars (writep + 8, MOVE_PC_INCR_OPCODE_SUFFIX, 2); -} - -/* Get the size of an immediate-reloc in bytes. Only valid for PIC - relocs. */ - -static unsigned int -cris_get_pic_reloc_size (bfd_reloc_code_real_type reloc) -{ - return reloc == BFD_RELOC_CRIS_16_GOTPLT || reloc == BFD_RELOC_CRIS_16_GOT - ? 2 : 4; -} - -/* Store a reloc type at *RELOCP corresponding to the PIC suffix at *CPP. - Adjust *EXPRP with any addend found after the PIC suffix. */ - -static void -cris_get_pic_suffix (char **cPP, bfd_reloc_code_real_type *relocp, - expressionS *exprP) -{ - char *s = *cPP; - unsigned int i; - expressionS const_expr; - - const struct pic_suffixes_struct - { - const char *const suffix; - unsigned int len; - bfd_reloc_code_real_type reloc; - } pic_suffixes[] = - { -#undef PICMAP -#define PICMAP(s, r) {s, sizeof (s) - 1, r} - /* Keep this in order with longest unambiguous prefix first. */ - PICMAP ("GOTPLT16", BFD_RELOC_CRIS_16_GOTPLT), - PICMAP ("GOTPLT", BFD_RELOC_CRIS_32_GOTPLT), - PICMAP ("PLTG", BFD_RELOC_CRIS_32_PLT_GOTREL), - PICMAP ("PLT", BFD_RELOC_CRIS_32_PLT_PCREL), - PICMAP ("GOTOFF", BFD_RELOC_CRIS_32_GOTREL), - PICMAP ("GOT16", BFD_RELOC_CRIS_16_GOT), - PICMAP ("GOT", BFD_RELOC_CRIS_32_GOT) - }; - - /* We've already seen the ':', so consume it. */ - s++; - - for (i = 0; i < sizeof (pic_suffixes)/sizeof (pic_suffixes[0]); i++) - { - if (strncmp (s, pic_suffixes[i].suffix, pic_suffixes[i].len) == 0 - && ! is_part_of_name (s[pic_suffixes[i].len])) - { - /* We have a match. Consume the suffix and set the relocation - type. */ - s += pic_suffixes[i].len; - - /* There can be a constant term appended. If so, we will add it - to *EXPRP. */ - if (*s == '+' || *s == '-') - { - if (! cris_get_expression (&s, &const_expr)) - /* There was some kind of syntax error. Bail out. */ - break; - - /* Allow complex expressions as the constant part. It still - has to be an assembly-time constant or there will be an - error emitting the reloc. This makes the PIC qualifiers - idempotent; foo:GOTOFF+32 == foo+32:GOTOFF. The former we - recognize here; the latter is parsed in the incoming - expression. */ - exprP->X_add_symbol = make_expr_symbol (exprP); - exprP->X_op = O_add; - exprP->X_add_number = 0; - exprP->X_op_symbol = make_expr_symbol (&const_expr); - } - - *relocp = pic_suffixes[i].reloc; - *cPP = s; - return; - } - } - - /* No match. Don't consume anything; fall back and there will be a - syntax error. */ -} - -/* This *could* have been: - - 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. - - type A character from FLTCHARS that describes what kind of - floating-point number is wanted. - - litp A pointer to an array that the result should be stored in. - - sizep A pointer to an integer where the size of the result is stored. - - But we don't support floating point constants in assembly code *at all*, - since it's suboptimal and just opens up bug opportunities. GCC emits - the bit patterns as hex. All we could do here is to emit what GCC - would have done in the first place. *Nobody* writes floating-point - code as assembly code, but if they do, they should be able enough to - find out the correct bit patterns and use them. */ - -char * -md_atof (int type ATTRIBUTE_UNUSED, char *litp ATTRIBUTE_UNUSED, - int *sizep ATTRIBUTE_UNUSED) -{ - /* FIXME: Is this function mentioned in the internals.texi manual? If - not, add it. */ - return _("Bad call to md_atof () - floating point formats are not supported"); -} - -/* Turn a number as a fixS * into a series of bytes that represents the - number on the target machine. The purpose of this procedure is the - same as that of md_number_to_chars but this procedure is supposed to - handle general bit field fixes and machine-dependent fixups. - - bufp Pointer to an array where the result should be stored. - - val The value to store. - - n The number of bytes in "val" that should be stored. - - fixP The fix to be applied to the bit field starting at bufp. - - seg The segment containing this number. */ - -static void -cris_number_to_imm (char *bufp, long val, int n, fixS *fixP, segT seg) -{ - segT sym_seg; - - know (n <= 4); - know (fixP); - - /* We put the relative "vma" for the other segment for inter-segment - relocations in the object data to stay binary "compatible" (with an - uninteresting old version) for the relocation. - Maybe delete some day. */ - if (fixP->fx_addsy - && (sym_seg = S_GET_SEGMENT (fixP->fx_addsy)) != seg) - val += sym_seg->vma; - - if (fixP->fx_addsy != NULL || fixP->fx_pcrel) - switch (fixP->fx_r_type) - { - /* These must be fully resolved when getting here. */ - case BFD_RELOC_16_PCREL: - case BFD_RELOC_8_PCREL: - as_bad_where (fixP->fx_file, fixP->fx_line, - _("PC-relative relocation must be trivially resolved")); - default: - ; - } - - /* Only do this for old-arch binaries. */ - if (cris_arch != arch_cris_any_v0_v10 - && (fixP->fx_addsy != NULL || fixP->fx_pcrel)) - return; - - switch (fixP->fx_r_type) - { - /* Ditto here, we put the addend into the object code as - well as the reloc addend. Keep it that way for now, to simplify - regression tests on the object file contents. FIXME: Seems - uninteresting now that we have a test suite. */ - - case BFD_RELOC_CRIS_16_GOT: - case BFD_RELOC_CRIS_32_GOT: - case BFD_RELOC_CRIS_32_GOTREL: - case BFD_RELOC_CRIS_16_GOTPLT: - case BFD_RELOC_CRIS_32_GOTPLT: - case BFD_RELOC_CRIS_32_PLT_GOTREL: - case BFD_RELOC_CRIS_32_PLT_PCREL: - /* We don't want to put in any kind of non-zero bits in the data - being relocated for these. */ - break; - - case BFD_RELOC_32_PCREL: - /* If this one isn't fully resolved, we don't want to put anything - in the object. */ - if (fixP->fx_addsy != NULL || fixP->fx_pcrel) - break; - - /* Fall through. */ - case BFD_RELOC_32: - /* No use having warnings here, since most hosts have a 32-bit type - for "long" (which will probably change soon, now that I wrote - this). */ - bufp[3] = (val >> 24) & 0xFF; - bufp[2] = (val >> 16) & 0xFF; - bufp[1] = (val >> 8) & 0xFF; - bufp[0] = val & 0xFF; - break; - - /* FIXME: The 16 and 8-bit cases should have a way to check - whether a signed or unsigned (or any signedness) number is - accepted. */ - - case BFD_RELOC_16: - case BFD_RELOC_16_PCREL: - if (val > 0xffff || val < -32768) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Value not in 16 bit range: %ld"), val); - if (! fixP->fx_addsy) - { - bufp[1] = (val >> 8) & 0xFF; - bufp[0] = val & 0xFF; - } - break; - - case BFD_RELOC_CRIS_SIGNED_16: - if (val > 32767 || val < -32768) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Value not in 16 bit signed range: %ld"), val); - if (! fixP->fx_addsy) - { - bufp[1] = (val >> 8) & 0xFF; - bufp[0] = val & 0xFF; - } - break; - - case BFD_RELOC_8: - case BFD_RELOC_8_PCREL: - if (val > 255 || val < -128) - as_bad_where (fixP->fx_file, fixP->fx_line, _("Value not in 8 bit range: %ld"), val); - if (! fixP->fx_addsy) - bufp[0] = val & 0xFF; - break; - - case BFD_RELOC_CRIS_SIGNED_8: - if (val > 127 || val < -128) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Value not in 8 bit signed range: %ld"), val); - if (! fixP->fx_addsy) - bufp[0] = val & 0xFF; - break; - - case BFD_RELOC_CRIS_LAPCQ_OFFSET: - /* FIXME: Test-cases for out-of-range values. Probably also need - to use as_bad_where. */ - case BFD_RELOC_CRIS_UNSIGNED_4: - if (val > 15 || val < 0) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Value not in 4 bit unsigned range: %ld"), val); - if (! fixP->fx_addsy) - bufp[0] |= val & 0x0F; - break; - - case BFD_RELOC_CRIS_UNSIGNED_5: - if (val > 31 || val < 0) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Value not in 5 bit unsigned range: %ld"), val); - if (! fixP->fx_addsy) - bufp[0] |= val & 0x1F; - break; - - case BFD_RELOC_CRIS_SIGNED_6: - if (val > 31 || val < -32) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Value not in 6 bit range: %ld"), val); - if (! fixP->fx_addsy) - bufp[0] |= val & 0x3F; - break; - - case BFD_RELOC_CRIS_UNSIGNED_6: - if (val > 63 || val < 0) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Value not in 6 bit unsigned range: %ld"), val); - if (! fixP->fx_addsy) - bufp[0] |= val & 0x3F; - break; - - case BFD_RELOC_CRIS_BDISP8: - if (! fixP->fx_addsy) - bufp[0] = branch_disp (val); - break; - - case BFD_RELOC_NONE: - /* May actually happen automatically. For example at broken - words, if the word turns out not to be broken. - FIXME: When? Which testcase? */ - if (! fixP->fx_addsy) - md_number_to_chars (bufp, val, n); - break; - - case BFD_RELOC_VTABLE_INHERIT: - /* This borrowed from tc-ppc.c on a whim. */ - if (fixP->fx_addsy - && !S_IS_DEFINED (fixP->fx_addsy) - && !S_IS_WEAK (fixP->fx_addsy)) - S_SET_WEAK (fixP->fx_addsy); - /* Fall through. */ - - case BFD_RELOC_VTABLE_ENTRY: - fixP->fx_done = 0; - break; - - default: - BAD_CASE (fixP->fx_r_type); - } -} - -/* Processes machine-dependent command line options. Called once for - each option on the command line that the machine-independent part of - GAS does not understand. */ - -int -md_parse_option (int arg, char *argp ATTRIBUTE_UNUSED) -{ - switch (arg) - { - case 'H': - case 'h': - printf (_("Please use --help to see usage and options for this assembler.\n")); - md_show_usage (stdout); - exit (EXIT_SUCCESS); - - case 'N': - warn_for_branch_expansion = 1; - break; - - case OPTION_NO_US: - demand_register_prefix = TRUE; - - if (OUTPUT_FLAVOR == bfd_target_aout_flavour) - as_bad (_("--no-underscore is invalid with a.out format")); - else - symbols_have_leading_underscore = FALSE; - break; - - case OPTION_US: - demand_register_prefix = FALSE; - symbols_have_leading_underscore = TRUE; - break; - - case OPTION_PIC: - pic = TRUE; - if (cris_arch != arch_crisv32) - md_long_jump_size = cris_any_v0_v10_long_jump_size_pic; - else - md_long_jump_size = crisv32_long_jump_size; - break; - - case OPTION_ARCH: - { - char *str = argp; - enum cris_archs argarch = cris_arch_from_string (&str); - - if (argarch == arch_cris_unknown) - as_bad (_("invalid <arch> in --march=<arch>: %s"), argp); - else - cris_arch = argarch; - - if (argarch == arch_crisv32) - { - err_for_dangerous_mul_placement = 0; - md_long_jump_size = crisv32_long_jump_size; - } - else - { - if (pic) - md_long_jump_size = cris_any_v0_v10_long_jump_size_pic; - else - md_long_jump_size = cris_any_v0_v10_long_jump_size; - } - } - break; - - case OPTION_MULBUG_ABORT_OFF: - err_for_dangerous_mul_placement = 0; - break; - - case OPTION_MULBUG_ABORT_ON: - err_for_dangerous_mul_placement = 1; - break; - - default: - return 0; - } - - return 1; -} - -/* Round up a section size to the appropriate boundary. */ -valueT -md_section_align (segT segment, valueT size) -{ - /* Round all sects to multiple of 4, except the bss section, which - we'll round to word-size. - - FIXME: Check if this really matters. All sections should be - rounded up, and all sections should (optionally) be assumed to be - dword-aligned, it's just that there is actual usage of linking to a - multiple of two. */ - if (OUTPUT_FLAVOR == bfd_target_aout_flavour) - { - if (segment == bss_section) - return (size + 1) & ~1; - return (size + 3) & ~3; - } - else - { - /* FIXME: Is this wanted? It matches the testsuite, but that's not - really a valid reason. */ - if (segment == text_section) - return (size + 3) & ~3; - } - - return size; -} - -/* Generate a machine-dependent relocation. */ -arelent * -tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP) -{ - arelent *relP; - bfd_reloc_code_real_type code; - - switch (fixP->fx_r_type) - { - case BFD_RELOC_CRIS_SIGNED_8: - code = BFD_RELOC_8; - break; - - case BFD_RELOC_CRIS_SIGNED_16: - code = BFD_RELOC_16; - break; - - case BFD_RELOC_CRIS_16_GOT: - case BFD_RELOC_CRIS_32_GOT: - case BFD_RELOC_CRIS_16_GOTPLT: - case BFD_RELOC_CRIS_32_GOTPLT: - case BFD_RELOC_CRIS_32_GOTREL: - case BFD_RELOC_CRIS_32_PLT_GOTREL: - case BFD_RELOC_CRIS_32_PLT_PCREL: - case BFD_RELOC_32: - case BFD_RELOC_32_PCREL: - case BFD_RELOC_16: - case BFD_RELOC_8: - case BFD_RELOC_VTABLE_INHERIT: - case BFD_RELOC_VTABLE_ENTRY: - case BFD_RELOC_CRIS_UNSIGNED_8: - case BFD_RELOC_CRIS_UNSIGNED_16: - case BFD_RELOC_CRIS_LAPCQ_OFFSET: - code = fixP->fx_r_type; - break; - default: - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Semantics error. This type of operand can not be relocated, it must be an assembly-time constant")); - return 0; - } - - relP = (arelent *) xmalloc (sizeof (arelent)); - assert (relP != 0); - relP->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); - *relP->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); - relP->address = fixP->fx_frag->fr_address + fixP->fx_where; - - relP->addend = fixP->fx_offset; - - /* This is the standard place for KLUDGEs to work around bugs in - bfd_install_relocation (first such note in the documentation - appears with binutils-2.8). - - That function bfd_install_relocation does the wrong thing with - putting stuff into the addend of a reloc (it should stay out) for a - weak symbol. The really bad thing is that it adds the - "segment-relative offset" of the symbol into the reloc. In this - case, the reloc should instead be relative to the symbol with no - other offset than the assembly code shows; and since the symbol is - weak, any local definition should be ignored until link time (or - thereafter). - To wit: weaksym+42 should be weaksym+42 in the reloc, - not weaksym+(offset_from_segment_of_local_weaksym_definition) - - To "work around" this, we subtract the segment-relative offset of - "known" weak symbols. This evens out the extra offset. - - That happens for a.out but not for ELF, since for ELF, - bfd_install_relocation uses the "special function" field of the - howto, and does not execute the code that needs to be undone. */ - - if (OUTPUT_FLAVOR == bfd_target_aout_flavour - && fixP->fx_addsy && S_IS_WEAK (fixP->fx_addsy) - && ! bfd_is_und_section (S_GET_SEGMENT (fixP->fx_addsy))) - { - relP->addend -= S_GET_VALUE (fixP->fx_addsy); - } - - relP->howto = bfd_reloc_type_lookup (stdoutput, code); - if (! relP->howto) - { - const char *name; - - name = S_GET_NAME (fixP->fx_addsy); - if (name == NULL) - name = _("<unknown>"); - as_fatal (_("Cannot generate relocation type for symbol %s, code %s"), - name, bfd_get_reloc_code_name (code)); - } - - return relP; -} - -/* Machine-dependent usage-output. */ - -void -md_show_usage (FILE *stream) -{ - /* The messages are formatted to line up with the generic options. */ - fprintf (stream, _("CRIS-specific options:\n")); - fprintf (stream, "%s", - _(" -h, -H Don't execute, print this help text. Deprecated.\n")); - fprintf (stream, "%s", - _(" -N Warn when branches are expanded to jumps.\n")); - fprintf (stream, "%s", - _(" --underscore User symbols are normally prepended with underscore.\n")); - fprintf (stream, "%s", - _(" Registers will not need any prefix.\n")); - fprintf (stream, "%s", - _(" --no-underscore User symbols do not have any prefix.\n")); - fprintf (stream, "%s", - _(" Registers will require a `$'-prefix.\n")); - fprintf (stream, "%s", - _(" --pic Enable generation of position-independent code.\n")); - fprintf (stream, "%s", - _(" --march=<arch> Generate code for <arch>. Valid choices for <arch>\n\ - are v0_v10, v10, v32 and common_v10_v32.\n")); -} - -/* Apply a fixS (fixup of an instruction or data that we didn't have - enough info to complete immediately) to the data in a frag. */ - -void -md_apply_fix (fixS *fixP, valueT *valP, segT seg) -{ - /* This assignment truncates upper bits if valueT is 64 bits (as with - --enable-64-bit-bfd), which is fine here, though we cast to avoid - any compiler warnings. */ - long val = (long) *valP; - char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; - - if (fixP->fx_addsy == 0 && !fixP->fx_pcrel) - fixP->fx_done = 1; - - if (fixP->fx_bit_fixP || fixP->fx_im_disp != 0) - { - as_bad_where (fixP->fx_file, fixP->fx_line, _("Invalid relocation")); - fixP->fx_done = 1; - } - else - { - /* We can't actually support subtracting a symbol. */ - if (fixP->fx_subsy != (symbolS *) NULL) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("expression too complex")); - - /* This operand-type is scaled. */ - if (fixP->fx_r_type == BFD_RELOC_CRIS_LAPCQ_OFFSET) - val /= 2; - cris_number_to_imm (buf, val, fixP->fx_size, fixP, seg); - } -} - -/* All relocations are relative to the location just after the fixup; - the address of the fixup plus its size. */ - -long -md_pcrel_from (fixS *fixP) -{ - valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; - - /* FIXME: We get here only at the end of assembly, when X in ".-X" is - still unknown. Since we don't have pc-relative relocations in a.out, - this is invalid. What to do if anything for a.out, is to add - pc-relative relocations everywhere including the elinux program - loader. For ELF, allow straight-forward PC-relative relocations, - which are always relative to the location after the relocation. */ - if (OUTPUT_FLAVOR != bfd_target_elf_flavour - || (fixP->fx_r_type != BFD_RELOC_8_PCREL - && fixP->fx_r_type != BFD_RELOC_16_PCREL - && fixP->fx_r_type != BFD_RELOC_32_PCREL - && fixP->fx_r_type != BFD_RELOC_CRIS_LAPCQ_OFFSET)) - as_bad_where (fixP->fx_file, fixP->fx_line, - _("Invalid pc-relative relocation")); - return fixP->fx_size + addr; -} - -/* We have no need to give defaults for symbol-values. */ -symbolS * -md_undefined_symbol (char *name ATTRIBUTE_UNUSED) -{ - return 0; -} - -/* If this function returns non-zero, it prevents the relocation - against symbol(s) in the FIXP from being replaced with relocations - against section symbols, and guarantees that a relocation will be - emitted even when the value can be resolved locally. */ -int -md_cris_force_relocation (struct fix *fixp) -{ - switch (fixp->fx_r_type) - { - case BFD_RELOC_CRIS_16_GOT: - case BFD_RELOC_CRIS_32_GOT: - case BFD_RELOC_CRIS_16_GOTPLT: - case BFD_RELOC_CRIS_32_GOTPLT: - case BFD_RELOC_CRIS_32_GOTREL: - case BFD_RELOC_CRIS_32_PLT_GOTREL: - case BFD_RELOC_CRIS_32_PLT_PCREL: - return 1; - default: - ; - } - - return generic_force_reloc (fixp); -} - -/* Check and emit error if broken-word handling has failed to fix up a - case-table. This is called from write.c, after doing everything it - knows about how to handle broken words. */ - -void -tc_cris_check_adjusted_broken_word (offsetT new_offset, struct broken_word *brokwP) -{ - if (new_offset > 32767 || new_offset < -32768) - /* We really want a genuine error, not a warning, so make it one. */ - as_bad_where (brokwP->frag->fr_file, brokwP->frag->fr_line, - _("Adjusted signed .word (%ld) overflows: `switch'-statement too large."), - (long) new_offset); -} - -/* Make a leading REGISTER_PREFIX_CHAR mandatory for all registers. */ - -static void -cris_force_reg_prefix (void) -{ - demand_register_prefix = TRUE; -} - -/* Do not demand a leading REGISTER_PREFIX_CHAR for all registers. */ - -static void -cris_relax_reg_prefix (void) -{ - demand_register_prefix = FALSE; -} - -/* Adjust for having a leading '_' on all user symbols. */ - -static void -cris_sym_leading_underscore (void) -{ - /* We can't really do anything more than assert that what the program - thinks symbol starts with agrees with the command-line options, since - the bfd is already created. */ - - if (!symbols_have_leading_underscore) - as_bad (_(".syntax %s requires command-line option `--underscore'"), - SYNTAX_USER_SYM_LEADING_UNDERSCORE); -} - -/* Adjust for not having any particular prefix on user symbols. */ - -static void cris_sym_no_leading_underscore (void) -{ - if (symbols_have_leading_underscore) - as_bad (_(".syntax %s requires command-line option `--no-underscore'"), - SYNTAX_USER_SYM_NO_LEADING_UNDERSCORE); -} - -/* Handle the .syntax pseudo, which takes an argument that decides what - syntax the assembly code has. */ - -static void -s_syntax (int ignore ATTRIBUTE_UNUSED) -{ - static const struct syntaxes - { - const char *const operand; - void (*fn) (void); - } syntax_table[] = - {{SYNTAX_ENFORCE_REG_PREFIX, cris_force_reg_prefix}, - {SYNTAX_RELAX_REG_PREFIX, cris_relax_reg_prefix}, - {SYNTAX_USER_SYM_LEADING_UNDERSCORE, cris_sym_leading_underscore}, - {SYNTAX_USER_SYM_NO_LEADING_UNDERSCORE, cris_sym_no_leading_underscore}}; - - const struct syntaxes *sp; - - for (sp = syntax_table; - sp < syntax_table + sizeof (syntax_table) / sizeof (syntax_table[0]); - sp++) - { - if (strncmp (input_line_pointer, sp->operand, - strlen (sp->operand)) == 0) - { - (sp->fn) (); - - input_line_pointer += strlen (sp->operand); - demand_empty_rest_of_line (); - return; - } - } - - as_bad (_("Unknown .syntax operand")); -} - -/* Wrapper for dwarf2_directive_file to emit error if this is seen when - not emitting ELF. */ - -static void -s_cris_file (int dummy) -{ - if (OUTPUT_FLAVOR != bfd_target_elf_flavour) - as_bad (_("Pseudodirective .file is only valid when generating ELF")); - else - dwarf2_directive_file (dummy); -} - -/* Wrapper for dwarf2_directive_loc to emit error if this is seen when not - emitting ELF. */ - -static void -s_cris_loc (int dummy) -{ - if (OUTPUT_FLAVOR != bfd_target_elf_flavour) - as_bad (_("Pseudodirective .loc is only valid when generating ELF")); - else - dwarf2_directive_loc (dummy); -} - -/* Translate a <arch> string (as common to --march=<arch> and .arch <arch>) - into an enum. If the string *STR is recognized, *STR is updated to point - to the end of the string. If the string is not recognized, - arch_cris_unknown is returned. */ - -static enum cris_archs -cris_arch_from_string (char **str) -{ - static const struct cris_arch_struct - { - const char *const name; - enum cris_archs arch; - } arch_table[] = - /* Keep in order longest-first for choices where one is a prefix - of another. */ - {{"v0_v10", arch_cris_any_v0_v10}, - {"v10", arch_crisv10}, - {"v32", arch_crisv32}, - {"common_v10_v32", arch_cris_common_v10_v32}}; - - const struct cris_arch_struct *ap; - - for (ap = arch_table; - ap < arch_table + sizeof (arch_table) / sizeof (arch_table[0]); - ap++) - { - int len = strlen (ap->name); - - if (strncmp (*str, ap->name, len) == 0 - && (str[0][len] == 0 || ISSPACE (str[0][len]))) - { - *str += strlen (ap->name); - return ap->arch; - } - } - - return arch_cris_unknown; -} - -/* Return nonzero if architecture version ARCH matches version range in - IVER. */ - -static int -cris_insn_ver_valid_for_arch (enum cris_insn_version_usage iver, - enum cris_archs arch) -{ - switch (arch) - { - case arch_cris_any_v0_v10: - return - (iver == cris_ver_version_all - || iver == cris_ver_warning - || iver == cris_ver_v0_3 - || iver == cris_ver_v3p - || iver == cris_ver_v0_10 - || iver == cris_ver_sim_v0_10 - || iver == cris_ver_v3_10 - || iver == cris_ver_v8 - || iver == cris_ver_v8p - || iver == cris_ver_v8_10 - || iver == cris_ver_v10 - || iver == cris_ver_v10p); - - case arch_crisv32: - return - (iver == cris_ver_version_all - || iver == cris_ver_v3p - || iver == cris_ver_v8p - || iver == cris_ver_v10p - || iver == cris_ver_v32p); - - case arch_cris_common_v10_v32: - return - (iver == cris_ver_version_all - || iver == cris_ver_v3p - || iver == cris_ver_v8p - || iver == cris_ver_v10p); - - case arch_crisv0: - return - (iver == cris_ver_version_all - || iver == cris_ver_v0_3 - || iver == cris_ver_v0_10 - || iver == cris_ver_sim_v0_10); - - case arch_crisv3: - return - (iver == cris_ver_version_all - || iver == cris_ver_v0_3 - || iver == cris_ver_v3p - || iver == cris_ver_v0_10 - || iver == cris_ver_sim_v0_10 - || iver == cris_ver_v3_10); - - case arch_crisv8: - return - (iver == cris_ver_version_all - || iver == cris_ver_v3p - || iver == cris_ver_v0_10 - || iver == cris_ver_sim_v0_10 - || iver == cris_ver_v3_10 - || iver == cris_ver_v8 - || iver == cris_ver_v8p - || iver == cris_ver_v8_10); - - case arch_crisv10: - return - (iver == cris_ver_version_all - || iver == cris_ver_v3p - || iver == cris_ver_v0_10 - || iver == cris_ver_sim_v0_10 - || iver == cris_ver_v3_10 - || iver == cris_ver_v8p - || iver == cris_ver_v8_10 - || iver == cris_ver_v10 - || iver == cris_ver_v10p); - - default: - BAD_CASE (arch); - } -} - -/* Assert that the .arch ARCHCHOICE1 is compatible with the specified or - default --march=<ARCHCHOICE2> option. */ - -static void -s_cris_arch (int dummy ATTRIBUTE_UNUSED) -{ - /* Right now we take the easy route and check for sameness. It's not - obvious that allowing e.g. --march=v32 and .arch common_v0_v32 - would be more useful than confusing, implementation-wise and - user-wise. */ - - char *str = input_line_pointer; - enum cris_archs arch = cris_arch_from_string (&str); - - if (arch == arch_cris_unknown) - { - as_bad (_("unknown operand to .arch")); - - /* For this one, str does not reflect the end of the operand, - since there was no matching arch. Skip it manually; skip - things that can be part of a word (a name). */ - while (is_part_of_name (*str)) - str++; - } - else if (arch != cris_arch) - as_bad (_(".arch <arch> requires a matching --march=... option")); - - input_line_pointer = str; - demand_empty_rest_of_line (); - return; -} - -/* - * Local variables: - * eval: (c-set-style "gnu") - * indent-tabs-mode: t - * End: - */ |