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Diffstat (limited to 'gas/config/tc-s390.c')
| -rw-r--r-- | gas/config/tc-s390.c | 1756 |
1 files changed, 1756 insertions, 0 deletions
diff --git a/gas/config/tc-s390.c b/gas/config/tc-s390.c new file mode 100644 index 0000000..329ac1a --- /dev/null +++ b/gas/config/tc-s390.c @@ -0,0 +1,1756 @@ +/* tc-s390.c -- Assemble for the S390 + Copyright (C) 2000 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + + This file is part of GAS, the GNU Assembler. + + GAS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + GAS is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with GAS; see the file COPYING. If not, write to the Free + Software Foundation, 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. */ + +#include <stdio.h> +#include <ctype.h> +#include "as.h" +#include "subsegs.h" +#include "struc-symbol.h" + +#include "opcode/s390.h" +#include "elf/s390.h" + +/* The default architecture */ +#ifndef DEFAULT_ARCH +#define DEFAULT_ARCH "s390" +#endif +static char *default_arch = DEFAULT_ARCH; +/* Either 32 or 64, selects file format. */ +static int s390_arch_size; +/* Current architecture. Start with the smallest instruction set */ +static enum s390_opcode_arch_val current_architecture = S390_OPCODE_ESA; +static int current_arch_mask = 1 << S390_OPCODE_ESA; +static int current_arch_requested = 0; + +/* Whether to use user friendly register names. Default is true. */ +#ifndef TARGET_REG_NAMES_P +#define TARGET_REG_NAMES_P true +#endif + +static boolean reg_names_p = TARGET_REG_NAMES_P; + +/* Generic assembler global variables which must be defined by all + targets. */ + +const char comment_chars[] = "#"; + +/* Characters which start a comment at the beginning of a line. */ +const char line_comment_chars[] = "#"; + +/* Characters which may be used to separate multiple commands on a + single line. */ +const char line_separator_chars[] = ";"; + +/* Characters which are used to indicate an exponent in a floating + point number. */ +const char EXP_CHARS[] = "eE"; + +/* Characters which mean that a number is a floating point constant, + as in 0d1.0. */ +const char FLT_CHARS[] = "dD"; + +/* The target specific pseudo-ops which we support. */ + +/* Define the prototypes for the pseudo-ops */ +static void s390_byte PARAMS ((int)); +static void s390_elf_cons PARAMS ((int)); +static void s390_bss PARAMS ((int)); +static void s390_insn PARAMS ((int)); +static void s390_literals PARAMS ((int)); + +const pseudo_typeS md_pseudo_table[] = +{ + { "align", s_align_bytes, 0 }, + /* Pseudo-ops which must be defined. */ + { "bss", s390_bss, 0 }, + { "insn", s390_insn, 0 }, + /* Pseudo-ops which must be overridden. */ + { "byte", s390_byte, 0 }, + { "short", s390_elf_cons, 2 }, + { "long", s390_elf_cons, 4 }, + { "quad", s390_elf_cons, 8 }, + { "ltorg", s390_literals, 0 }, + { "string", stringer, 2 }, + { NULL, NULL, 0 } +}; + + +/* Structure to hold information about predefined registers. */ +struct pd_reg + { + char *name; + int value; + }; + +/* List of registers that are pre-defined: + + Each access register has a predefined name of the form: + a<reg_num> which has the value <reg_num>. + + Each control register has a predefined name of the form: + c<reg_num> which has the value <reg_num>. + + Each general register has a predefined name of the form: + r<reg_num> which has the value <reg_num>. + + Each floating point register a has predefined name of the form: + f<reg_num> which has the value <reg_num>. + + There are individual registers as well: + sp has the value 15 + lit has the value 12 + + The table is sorted. Suitable for searching by a binary search. */ + +static const struct pd_reg pre_defined_registers[] = +{ + { "a0", 0 }, /* Access registers */ + { "a1", 1 }, + { "a10", 10 }, + { "a11", 11 }, + { "a12", 12 }, + { "a13", 13 }, + { "a14", 14 }, + { "a15", 15 }, + { "a2", 2 }, + { "a3", 3 }, + { "a4", 4 }, + { "a5", 5 }, + { "a6", 6 }, + { "a7", 7 }, + { "a8", 8 }, + { "a9", 9 }, + + { "c0", 0 }, /* Control registers */ + { "c1", 1 }, + { "c10", 10 }, + { "c11", 11 }, + { "c12", 12 }, + { "c13", 13 }, + { "c14", 14 }, + { "c15", 15 }, + { "c2", 2 }, + { "c3", 3 }, + { "c4", 4 }, + { "c5", 5 }, + { "c6", 6 }, + { "c7", 7 }, + { "c8", 8 }, + { "c9", 9 }, + + { "f0", 0 }, /* Floating point registers */ + { "f1", 1 }, + { "f10", 10 }, + { "f11", 11 }, + { "f12", 12 }, + { "f13", 13 }, + { "f14", 14 }, + { "f15", 15 }, + { "f2", 2 }, + { "f3", 3 }, + { "f4", 4 }, + { "f5", 5 }, + { "f6", 6 }, + { "f7", 7 }, + { "f8", 8 }, + { "f9", 9 }, + + { "lit", 13 }, /* Pointer to literal pool */ + + { "r0", 0 }, /* General purpose registers */ + { "r1", 1 }, + { "r10", 10 }, + { "r11", 11 }, + { "r12", 12 }, + { "r13", 13 }, + { "r14", 14 }, + { "r15", 15 }, + { "r2", 2 }, + { "r3", 3 }, + { "r4", 4 }, + { "r5", 5 }, + { "r6", 6 }, + { "r7", 7 }, + { "r8", 8 }, + { "r9", 9 }, + + { "sp", 15 }, /* Stack pointer */ + +}; + +#define REG_NAME_CNT (sizeof(pre_defined_registers) / sizeof(struct pd_reg)) + +/* Given NAME, find the register number associated with that name, return + the integer value associated with the given name or -1 on failure. */ + +static int +reg_name_search (regs, regcount, name) + const struct pd_reg *regs; + int regcount; + const char *name; +{ + int middle, low, high; + int cmp; + + low = 0; + high = regcount - 1; + + do + { + middle = (low + high) / 2; + cmp = strcasecmp (name, regs[middle].name); + if (cmp < 0) + high = middle - 1; + else if (cmp > 0) + low = middle + 1; + else + return regs[middle].value; + } + while (low <= high); + + return -1; +} + + +/* + * Summary of register_name(). + * + * in: Input_line_pointer points to 1st char of operand. + * + * out: A expressionS. + * The operand may have been a register: in this case, X_op == O_register, + * X_add_number is set to the register number, and truth is returned. + * Input_line_pointer->(next non-blank) char after operand, or is in its + * original state. + */ + +static boolean +register_name (expressionP) + expressionS *expressionP; +{ + int reg_number; + char *name; + char *start; + char c; + + /* Find the spelling of the operand */ + start = name = input_line_pointer; + if (name[0] == '%' && isalpha (name[1])) + name = ++input_line_pointer; + else + return false; + + c = get_symbol_end (); + reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name); + + /* look to see if it's in the register table */ + if (reg_number >= 0) + { + expressionP->X_op = O_register; + expressionP->X_add_number = reg_number; + + /* make the rest nice */ + expressionP->X_add_symbol = NULL; + expressionP->X_op_symbol = NULL; + *input_line_pointer = c; /* put back the delimiting char */ + return true; + } + else + { + /* reset the line as if we had not done anything */ + *input_line_pointer = c; /* put back the delimiting char */ + input_line_pointer = start; /* reset input_line pointer */ + return false; + } +} + +/* Local variables. */ + +/* Opformat hash table. */ +static struct hash_control *s390_opformat_hash; + +/* Opcode hash table. */ +static struct hash_control *s390_opcode_hash; + +/* Flags to set in the elf header */ +static flagword s390_flags = 0; + +symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ + +#ifndef WORKING_DOT_WORD +const int md_short_jump_size = 4; +const int md_long_jump_size = 4; +#endif + +CONST char *md_shortopts = "A:m:kVQ:"; +struct option md_longopts[] = { + {NULL, no_argument, NULL, 0} +}; +size_t md_longopts_size = sizeof(md_longopts); + +/* Initialize the default opcode arch and word size from the default + architecture name. */ +static void +init_default_arch () +{ + if (current_arch_requested) + return; + if (strcmp(default_arch, "s390") == 0) { + s390_arch_size = 32; + current_architecture = S390_OPCODE_ESA; + } else if (strcmp(default_arch, "s390x") == 0) { + s390_arch_size = 64; + current_architecture = S390_OPCODE_ESAME; + } else + as_fatal ("Invalid default architecture, broken assembler."); + current_arch_mask = 1 << current_architecture; +} + +/* Called by TARGET_FORMAT. */ +const char * +s390_target_format () +{ + /* We don't get a chance to initialize anything before we're called, + so handle that now. */ + if (! s390_arch_size) + init_default_arch (); + + return s390_arch_size == 64 ? "elf64-s390" : "elf32-s390"; +} + +int +md_parse_option (c, arg) + int c; + char *arg; +{ + switch (c) { + /* -k: Ignore for FreeBSD compatibility. */ + case 'k': + break; + case 'm': + if (arg != NULL && strcmp (arg, "regnames") == 0) + reg_names_p = true; + + else if (arg != NULL && strcmp (arg, "no-regnames") == 0) + reg_names_p = false; + + else { + as_bad (_("invalid switch -m%s"), arg); + return 0; + } + break; + + case 'A': + if (arg != NULL && strcmp (arg, "esa") == 0) { + current_architecture = S390_OPCODE_ESA; + s390_arch_size = 32; + } else if (arg != NULL && strcmp (arg, "esame") == 0) { + current_architecture = S390_OPCODE_ESAME; + s390_arch_size = 64; + } else + as_bad ("invalid architecture -A%s", arg); + current_arch_mask = 1 << current_architecture; + current_arch_requested = 1; + break; + + /* -V: SVR4 argument to print version ID. */ + case 'V': + print_version_id (); + break; + + /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section + should be emitted or not. FIXME: Not implemented. */ + case 'Q': + break; + + default: + return 0; + } + + return 1; +} + +void +md_show_usage (stream) + FILE *stream; +{ + fprintf(stream, _("\ + S390 options:\n\ + -mregnames \tAllow symbolic names for registers\n\ + -mno-regnames\tDo not allow symbolic names for registers\n")); + fprintf(stream, _("\ + -V \tprint assembler version number\n\ + -Qy, -Qn \tignored\n")); +} + +/* This function is called when the assembler starts up. It is called + after the options have been parsed and the output file has been + opened. */ + +void +md_begin () +{ + register const struct s390_opcode *op; + const struct s390_opcode *op_end; + boolean dup_insn = false; + const char *retval; + + /* Set the ELF flags if desired. */ + if (s390_flags) + bfd_set_private_flags (stdoutput, s390_flags); + + /* Insert the opcode formats into a hash table. */ + s390_opformat_hash = hash_new (); + + op_end = s390_opformats + s390_num_opformats; + for (op = s390_opformats; op < op_end; op++) { + retval = hash_insert (s390_opformat_hash, op->name, (PTR) op); + if (retval != (const char *) NULL) + { + as_bad (_("Internal assembler error for instruction format %s"), + op->name); + dup_insn = true; + } + } + + /* Insert the opcodes into a hash table. */ + s390_opcode_hash = hash_new (); + + op_end = s390_opcodes + s390_num_opcodes; + for (op = s390_opcodes; op < op_end; op++) { + retval = hash_insert (s390_opcode_hash, op->name, (PTR) op); + if (retval != (const char *) NULL) + { + as_bad (_("Internal assembler error for instruction %s"), op->name); + dup_insn = true; + } + } + + if (dup_insn) + abort (); + + record_alignment (text_section, 2); + record_alignment (data_section, 2); + record_alignment (bss_section, 2); + +} + +/* Called after all assembly has been done. */ +void +s390_md_end () +{ + if (s390_arch_size == 64) { + bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_esame); + } else { + bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_esa); + } +} + +void +s390_align_code (fragP, count) + fragS *fragP; + int count; +{ + /* We use nop pattern 0x0707. */ + if (count > 0) { + memset(fragP->fr_literal + fragP->fr_fix, 0x07, count); + fragP->fr_var = count; + } +} + +/* Insert an operand value into an instruction. */ + +static void +s390_insert_operand (insn, operand, val, file, line) + unsigned char *insn; + const struct s390_operand *operand; + offsetT val; + char *file; + unsigned int line; +{ + addressT uval; + int offset; + + if (operand->flags & (S390_OPERAND_SIGNED|S390_OPERAND_PCREL)) { + offsetT min, max; + + max = ((offsetT) 1 << (operand->bits - 1)) - 1; + min = - ((offsetT) 1 << (operand->bits - 1)); + /* Halve PCREL operands. */ + if (operand->flags & S390_OPERAND_PCREL) + val >>= 1; + /* Check for underflow / overflow. */ + if (val < min || val > max) { + const char *err = + "operand out of range (%s not between %ld and %ld)"; + char buf[100]; + + if (operand->flags & S390_OPERAND_PCREL) { + val <<= 1; + min <<= 1; + max <<= 1; + } + sprint_value (buf, val); + if (file == (char *) NULL) + as_bad (err, buf, (int) min, (int) max); + else + as_bad_where (file, line, err, buf, (int) min, (int) max); + return; + } + /* val is ok, now restrict it to operand->bits bits. */ + uval = (addressT) val & ((((addressT) 1 << (operand->bits-1)) << 1) - 1); + } else { + addressT min, max; + + max = (((addressT) 1 << (operand->bits - 1))<<1) - 1; + min = (offsetT) 0; + uval = (addressT) val; + /* Length x in an instructions has real length x+1. */ + if (operand->flags & S390_OPERAND_LENGTH) + uval--; + /* Check for underflow / overflow. */ + if (uval < min || uval > max) { + const char *err = + "operand out of range (%s not between %ld and %ld)"; + char buf[100]; + + if (operand->flags & S390_OPERAND_LENGTH) { + uval++; + min++; + max++; + } + sprint_value (buf, uval); + if (file == (char *) NULL) + as_bad (err, buf, (int) min, (int) max); + else + as_bad_where (file, line, err, buf, (int) min, (int) max); + return; + } + } + + /* Insert fragments of the operand byte for byte. */ + offset = operand->shift + operand->bits; + uval <<= (-offset) & 7; + insn += (offset - 1)/8; + while (uval != 0) { + *insn-- |= uval; + uval >>= 8; + } +} + +/* Structure used to hold suffixes. */ +typedef enum { + ELF_SUFFIX_NONE = 0, + ELF_SUFFIX_GOT, + ELF_SUFFIX_PLT, + ELF_SUFFIX_GOTENT +} elf_suffix_type; + +struct map_bfd { + char *string; + int length; + elf_suffix_type suffix; +}; + +/* Parse @got/@plt/@gotoff. and return the desired relocation. */ +static elf_suffix_type +s390_elf_suffix (str_p, exp_p) + char **str_p; + expressionS *exp_p; +{ + static struct map_bfd mapping[] = { + { "got", 3, ELF_SUFFIX_GOT }, + { "got12", 5, ELF_SUFFIX_GOT }, + { "plt", 3, ELF_SUFFIX_PLT }, + { "gotent", 6, ELF_SUFFIX_GOTENT }, + { NULL, 0, ELF_SUFFIX_NONE } + }; + + struct map_bfd *ptr; + char *str = *str_p; + char *ident; + int len; + + if (*str++ != '@') + return ELF_SUFFIX_NONE; + + ident = str; + while (isalnum(*str)) + str++; + len = str - ident; + + for (ptr = &mapping[0]; ptr->length > 0; ptr++) + if (len == ptr->length && + strncasecmp(ident, ptr->string, ptr->length) == 0) { + if (exp_p->X_add_number != 0) + as_warn (_("identifier+constant@%s means identifier@%s+constant"), + ptr->string, ptr->string); + /* Now check for identifier@suffix+constant. */ + if (*str == '-' || *str == '+') { + char *orig_line = input_line_pointer; + expressionS new_exp; + + input_line_pointer = str; + expression (&new_exp); + + switch (new_exp.X_op) { + case O_constant: /* X_add_number (a constant expression). */ + exp_p->X_add_number += new_exp.X_add_number; + str = input_line_pointer; + break; + case O_symbol: /* X_add_symbol + X_add_number. */ + /* this case is used for e.g. xyz@PLT+.Label. */ + exp_p->X_add_number += new_exp.X_add_number; + exp_p->X_op_symbol = new_exp.X_add_symbol; + exp_p->X_op = O_add; + str = input_line_pointer; + break; + case O_uminus: /* (- X_add_symbol) + X_add_number. */ + /* this case is used for e.g. xyz@PLT-.Label. */ + exp_p->X_add_number += new_exp.X_add_number; + exp_p->X_op_symbol = new_exp.X_add_symbol; + exp_p->X_op = O_subtract; + str = input_line_pointer; + break; + default: + break; + } + + /* If s390_elf_suffix has not been called with + &input_line_pointer as first parameter, we have + clobbered the input_line_pointer. We have to + undo that. */ + if (&input_line_pointer != str_p) + input_line_pointer = orig_line; + } + *str_p = str; + return ptr->suffix; + } + + return BFD_RELOC_UNUSED; +} + +/* Structure used to hold a literal pool entry. */ +struct s390_lpe { + struct s390_lpe *next; + expressionS ex; + FLONUM_TYPE floatnum; /* used if X_op == O_big && X_add_number <= 0 */ + LITTLENUM_TYPE bignum[4]; /* used if X_op == O_big && X_add_number > 0 */ + int nbytes; + bfd_reloc_code_real_type reloc; + symbolS *sym; +}; + +static struct s390_lpe *lpe_free_list = NULL; +static struct s390_lpe *lpe_list = NULL; +static struct s390_lpe *lpe_list_tail = NULL; +static symbolS *lp_sym = NULL; +static int lp_count = 0; +static int lpe_count = 0; + +static int +s390_exp_compare(exp1, exp2) + expressionS *exp1; + expressionS *exp2; +{ + if (exp1->X_op != exp2->X_op) + return 0; + + switch (exp1->X_op) { + case O_constant: /* X_add_number must be equal. */ + case O_register: + return exp1->X_add_number == exp2->X_add_number; + + case O_big: + as_bad(_("Can't handle O_big in s390_exp_compare")); + + case O_symbol: /* X_add_symbol & X_add_number must be equal. */ + case O_symbol_rva: + case O_uminus: + case O_bit_not: + case O_logical_not: + return (exp1->X_add_symbol == exp2->X_add_symbol) && + (exp1->X_add_number == exp2->X_add_number); + + case O_multiply: /* X_add_symbol,X_op_symbol&X_add_number must be equal. */ + case O_divide: + case O_modulus: + case O_left_shift: + case O_right_shift: + case O_bit_inclusive_or: + case O_bit_or_not: + case O_bit_exclusive_or: + case O_bit_and: + case O_add: + case O_subtract: + case O_eq: + case O_ne: + case O_lt: + case O_le: + case O_ge: + case O_gt: + case O_logical_and: + case O_logical_or: + return (exp1->X_add_symbol == exp2->X_add_symbol) && + (exp1->X_op_symbol == exp2->X_op_symbol) && + (exp1->X_add_number == exp2->X_add_number); + default: + return 0; + } +} + +/* Test for @lit and if its present make an entry in the literal pool and + modify the current expression to be an offset into the literal pool. */ +static elf_suffix_type +s390_lit_suffix (str_p, exp_p, suffix) + char **str_p; + expressionS *exp_p; + elf_suffix_type suffix; +{ + bfd_reloc_code_real_type reloc; + char tmp_name[64]; + char *str = *str_p; + char *ident; + struct s390_lpe *lpe; + int nbytes, len; + + if (*str++ != ':') + return suffix; /* No modification. */ + + /* We look for a suffix of the form "@lit1", "@lit2", "@lit4" or "@lit8". */ + ident = str; + while (isalnum(*str)) + str++; + len = str - ident; + if (len != 4 || strncasecmp(ident, "lit", 3) != 0 || + (ident[3]!='1' && ident[3]!='2' && ident[3]!='4' && ident[3]!='8')) + return suffix; /* no modification */ + nbytes = ident[3] - '0'; + + reloc = BFD_RELOC_UNUSED; + if (suffix == ELF_SUFFIX_GOT) { + if (nbytes == 2) + reloc = BFD_RELOC_390_GOT16; + else if (nbytes == 4) + reloc = BFD_RELOC_32_GOT_PCREL; + else if (nbytes == 8) + reloc = BFD_RELOC_390_GOT64; + } else if (suffix == ELF_SUFFIX_PLT) { + if (nbytes == 4) + reloc = BFD_RELOC_390_PLT32; + else if (nbytes == 8) + reloc = BFD_RELOC_390_PLT64; + } + + if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) { + as_bad (_("Invalid suffix for literal pool entry")); + } + + /* Search the pool if the new entry is a duplicate. */ + if (exp_p->X_op == O_big) { + /* Special processing for big numbers. */ + for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) { + if (lpe->ex.X_op == O_big) { + if (exp_p->X_add_number <= 0 && lpe->ex.X_add_number <= 0) { + if (memcmp(&generic_floating_point_number, &lpe->floatnum, + sizeof(FLONUM_TYPE)) == 0) + break; + } else if (exp_p->X_add_number == lpe->ex.X_add_number) { + if (memcmp(generic_bignum, lpe->bignum, + sizeof(LITTLENUM_TYPE)*exp_p->X_add_number) == 0) + break; + } + } + } + } else { + /* Processing for 'normal' data types. */ + for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) + if (lpe->nbytes == nbytes && lpe->reloc == reloc && + s390_exp_compare(exp_p, &lpe->ex) != 0) + break; + } + if (lpe == NULL) { /* A new literal. */ + if (lpe_free_list != NULL) { + lpe = lpe_free_list; + lpe_free_list = lpe_free_list->next; + } else { + lpe = (struct s390_lpe *) xmalloc(sizeof(struct s390_lpe)); + } + lpe->ex = *exp_p; + if (exp_p->X_op == O_big) { + if (exp_p->X_add_number <= 0) + lpe->floatnum = generic_floating_point_number; + else if (exp_p->X_add_number <= 4) + memcpy(lpe->bignum, generic_bignum, + exp_p->X_add_number*sizeof(LITTLENUM_TYPE)); + else + as_bad(_("Big number is too big")); + } + lpe->nbytes = nbytes; + lpe->reloc = reloc; + /* Literal pool name defined ? */ + if (lp_sym == NULL) { + sprintf(tmp_name, ".L\001%i", lp_count); + lp_sym = symbol_make(tmp_name); + } + /* Make name for literal pool entry. */ + sprintf(tmp_name, ".L\001%i\002%i", lp_count, lpe_count); + lpe_count++; + lpe->sym = symbol_make(tmp_name); + /* Add to literal pool list. */ + lpe->next = NULL; + if (lpe_list_tail != NULL) { + lpe_list_tail->next = lpe; + lpe_list_tail = lpe; + } else + lpe_list = lpe_list_tail = lpe; + } + + /* Now change exp_p to the offset into the literal pool. + Thats the expression: .L^Ax^By-.L^Ax */ + exp_p->X_add_symbol = lpe->sym; + exp_p->X_op_symbol = lp_sym; + exp_p->X_op = O_subtract; + exp_p->X_add_number = 0; + + *str_p = str; + + /* We change the suffix type to ELF_SUFFIX_NONE, because + the difference of two local labels is just a number. */ + return ELF_SUFFIX_NONE; +} + +/* Like normal .long/.short/.word, except support @got, etc. + clobbers input_line_pointer, checks end-of-line. */ +static void +s390_elf_cons (nbytes) + register int nbytes; /* 1=.byte, 2=.word, 4=.long */ +{ + expressionS exp; + elf_suffix_type suffix; + + if (is_it_end_of_statement ()) { + demand_empty_rest_of_line (); + return; + } + + do { + expression (&exp); + if (exp.X_op == O_symbol && *input_line_pointer == '@' && + (suffix=s390_elf_suffix(&input_line_pointer, &exp))!=ELF_SUFFIX_NONE) { + bfd_reloc_code_real_type reloc; + reloc_howto_type *reloc_howto; + int size; + char *where; + + if (nbytes == 2 && suffix == ELF_SUFFIX_GOT) + reloc = BFD_RELOC_390_GOT16; + else if (nbytes == 4 && suffix == ELF_SUFFIX_GOT) + reloc = BFD_RELOC_32_GOT_PCREL; + else if (nbytes == 8 && suffix == ELF_SUFFIX_GOT) + reloc = BFD_RELOC_390_GOT64; + else if (nbytes == 4 && suffix == ELF_SUFFIX_PLT) + reloc = BFD_RELOC_390_PLT32; + else if (nbytes == 8 && suffix == ELF_SUFFIX_PLT) + reloc = BFD_RELOC_390_PLT64; + else + reloc = BFD_RELOC_UNUSED; + + if (reloc != BFD_RELOC_UNUSED) { + reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc); + size = bfd_get_reloc_size (reloc_howto); + if (size > nbytes) + as_bad (_("%s relocations do not fit in %d bytes"), + reloc_howto->name, nbytes); + where = frag_more(nbytes); + md_number_to_chars (where, 0, size); + fix_new_exp (frag_now, where - frag_now->fr_literal, + size, &exp, reloc_howto->pc_relative, reloc); + } else + as_bad (_("relocation not applicable")); + } else + emit_expr (&exp, (unsigned int) nbytes); + } while (*input_line_pointer++ == ','); + + input_line_pointer--; /* Put terminator back into stream. */ + demand_empty_rest_of_line (); +} + +/* We need to keep a list of fixups. We can't simply generate them as + we go, because that would require us to first create the frag, and + that would screw up references to ``.''. */ + +struct s390_fixup +{ + expressionS exp; + int opindex; + bfd_reloc_code_real_type reloc; +}; + +#define MAX_INSN_FIXUPS (4) + +/* This routine is called for each instruction to be assembled. */ + +char * +md_gather_operands (str, insn, opcode) + char *str; + unsigned char *insn; + const struct s390_opcode *opcode; +{ + struct s390_fixup fixups[MAX_INSN_FIXUPS]; + const struct s390_operand *operand; + const unsigned char *opindex_ptr; + elf_suffix_type suffix; + bfd_reloc_code_real_type reloc; + int skip_optional; + int parentheses; + char *f; + int fc, i; + + while (isspace(*str)) str++; + + parentheses = 0; + skip_optional = 0; + + /* Gather the operands. */ + fc = 0; + for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) { + expressionS ex; + char *hold; + + operand = s390_operands + *opindex_ptr; + + if (skip_optional && (operand->flags & S390_OPERAND_INDEX)) { + /* We do an early skip. For D(X,B) constructions the index + register is skipped (X is optional). For D(L,B) the base + register will be the skipped operand, because L is NOT + optional. */ + skip_optional = 0; + continue; + } + + /* Gather the operand. */ + hold = input_line_pointer; + input_line_pointer = str; + + if (! register_name (&ex)) /* parse the operand */ + expression (&ex); + + str = input_line_pointer; + input_line_pointer = hold; + + /* Write the operand to the insn. */ + if (ex.X_op == O_illegal) + as_bad (_("illegal operand")); + else if (ex.X_op == O_absent) + as_bad (_("missing operand")); + else if (ex.X_op == O_register || ex.X_op == O_constant) { + s390_lit_suffix (&str, &ex, ELF_SUFFIX_NONE); + if (ex.X_op != O_register && ex.X_op != O_constant) { + /* We need to generate a fixup for the + expression returned by s390_lit_suffix. */ + if (fc >= MAX_INSN_FIXUPS) + as_fatal (_("too many fixups")); + fixups[fc].exp = ex; + fixups[fc].opindex = *opindex_ptr; + fixups[fc].reloc = BFD_RELOC_UNUSED; + ++fc; + } else { + if ((operand->flags & S390_OPERAND_INDEX) && ex.X_add_number == 0) + as_warn("index register specified but zero"); + if ((operand->flags & S390_OPERAND_BASE) && ex.X_add_number == 0) + as_warn("base register specified but zero"); + s390_insert_operand (insn, operand, ex.X_add_number, NULL, 0); + } + } else { + suffix = s390_elf_suffix (&str, &ex); + suffix = s390_lit_suffix (&str, &ex, suffix); + reloc = BFD_RELOC_UNUSED; + if (suffix == ELF_SUFFIX_GOT) { + if (operand->flags & S390_OPERAND_DISP) + reloc = BFD_RELOC_390_GOT12; + else if ((operand->flags & S390_OPERAND_SIGNED) && + (operand->bits == 16)) + reloc = BFD_RELOC_390_GOT16; + else if ((operand->flags & S390_OPERAND_PCREL) && + (operand->bits == 32)) + reloc = BFD_RELOC_390_GOTENT; + } else if (suffix == ELF_SUFFIX_PLT) { + if ((operand->flags & S390_OPERAND_PCREL) && + (operand->bits == 16)) + reloc = BFD_RELOC_390_PLT16DBL; + else if ((operand->flags & S390_OPERAND_PCREL) && + (operand->bits == 32)) + reloc = BFD_RELOC_390_PLT32DBL; + } else if (suffix == ELF_SUFFIX_GOTENT) { + if ((operand->flags & S390_OPERAND_PCREL) && + (operand->bits == 32)) + reloc = BFD_RELOC_390_GOTENT; + } + + if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) + as_bad (_("invalid operand suffix")); + /* We need to generate a fixup of type 'reloc' for this + expression. */ + if (fc >= MAX_INSN_FIXUPS) + as_fatal (_("too many fixups")); + fixups[fc].exp = ex; + fixups[fc].opindex = *opindex_ptr; + fixups[fc].reloc = reloc; + ++fc; + } + + /* Check the next character. The call to expression has advanced + str past any whitespace. */ + if (operand->flags & S390_OPERAND_DISP) { + /* After a displacement a block in parentheses can start. */ + if (*str != '(') { + /* Check if parethesed block can be skipped. If the next + operand is neiter an optional operand nor a base register + then we have a syntax error. */ + operand = s390_operands + *(++opindex_ptr); + if (!(operand->flags & (S390_OPERAND_INDEX|S390_OPERAND_BASE))) + as_bad (_("syntax error; missing '(' after displacement")); + + /* Ok, skip all operands until S390_OPERAND_BASE. */ + while (!(operand->flags & S390_OPERAND_BASE)) + operand = s390_operands + *(++opindex_ptr); + + /* If there is a next operand it must be seperated by a comma. */ + if (opindex_ptr[1] != '\0') { + if (*str++ != ',') + as_bad(_("syntax error; expected ,")); + } + } else { /* We found an opening parentheses. */ + str++; + for (f = str; *f != '\0'; f++) + if (*f == ',' || *f == ')') + break; + /* If there is no comma until the closing parentheses OR + there is a comma right after the opening parentheses, + we have to skip optional operands. */ + if (*f == ',' && f == str) { /* comma directly after '(' ? */ + skip_optional = 1; + str++; + } else + skip_optional = (*f != ','); + } + } else if (operand->flags & S390_OPERAND_BASE) { + /* After the base register the parenthesed block ends. */ + if (*str++ != ')') + as_bad(_("syntax error; missing ')' after base register")); + skip_optional = 0; + /* If there is a next operand it must be seperated by a comma. */ + if (opindex_ptr[1] != '\0') { + if (*str++ != ',') + as_bad(_("syntax error; expected ,")); + } + } else { + /* We can find an 'early' closing parentheses in e.g. D(L) instead + of D(L,B). In this case the base register has to be skipped. */ + if (*str == ')') { + operand = s390_operands + *(++opindex_ptr); + if (!(operand->flags & S390_OPERAND_BASE)) + as_bad (_("syntax error; ')' not allowed here")); + str++; + } + /* If there is a next operand it must be seperated by a comma. */ + if (opindex_ptr[1] != '\0') { + if (*str++ != ',') + as_bad(_("syntax error; expected ,")); + } + } + } + + while (isspace (*str)) + ++str; + + if (*str != '\0') { + char *linefeed; + + if ((linefeed = strchr(str, '\n')) != NULL) + *linefeed = '\0'; + as_bad (_("junk at end of line: `%s'"), str); + if (linefeed != NULL) + *linefeed = '\n'; + } + + /* Write out the instruction. */ + f = frag_more (opcode->oplen); + memcpy(f, insn, opcode->oplen); + + /* Create any fixups. At this point we do not use a + bfd_reloc_code_real_type, but instead just use the + BFD_RELOC_UNUSED plus the operand index. This lets us easily + handle fixups for any operand type, although that is admittedly + not a very exciting feature. We pick a BFD reloc type in + md_apply_fix3. */ + for (i = 0; i < fc; i++) { + operand = s390_operands + fixups[i].opindex; + + if (fixups[i].reloc != BFD_RELOC_UNUSED) { + reloc_howto_type *reloc_howto; + fixS *fixP; + int size; + + reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); + if (!reloc_howto) + abort (); + + size = bfd_get_reloc_size (reloc_howto); + + if (size < 1 || size > 4) + abort(); + + fixP = fix_new_exp (frag_now, + f - frag_now->fr_literal + (operand->shift/8), + size, &fixups[i].exp, reloc_howto->pc_relative, + fixups[i].reloc); + /* Turn off overflow checking in fixup_segment. This is necessary + because fixup_segment will signal an overflow for large 4 byte + quantities for GOT12 relocations. */ + if (fixups[i].reloc == BFD_RELOC_390_GOT12 || + fixups[i].reloc == BFD_RELOC_390_GOT16) + fixP->fx_no_overflow = 1; + } else + fix_new_exp (frag_now, f - frag_now->fr_literal, 4, &fixups[i].exp, + (operand->flags & S390_OPERAND_PCREL) != 0, + ((bfd_reloc_code_real_type) + (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); + } + return str; +} + +/* This routine is called for each instruction to be assembled. */ + +void +md_assemble (str) + char *str; +{ + const struct s390_opcode *opcode; + unsigned char insn[6]; + char *s; + + /* Get the opcode. */ + for (s = str; *s != '\0' && ! isspace (*s); s++) + ; + if (*s != '\0') + *s++ = '\0'; + + /* Look up the opcode in the hash table. */ + opcode = (struct s390_opcode *) hash_find (s390_opcode_hash, str); + if (opcode == (const struct s390_opcode *) NULL) { + as_bad (_("Unrecognized opcode: `%s'"), str); + return; + } else if (!(opcode->architecture & current_arch_mask)) { + as_bad("Opcode %s not available in this architecture", str); + return; + } + + memcpy(insn, opcode->opcode, sizeof(insn)); + md_gather_operands(s, insn, opcode); +} + +#ifndef WORKING_DOT_WORD +/* Handle long and short jumps. We don't support these */ +void +md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) + char *ptr; + addressT from_addr, to_addr; + fragS *frag; + symbolS *to_symbol; +{ + abort (); +} + +void +md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) + char *ptr; + addressT from_addr, to_addr; + fragS *frag; + symbolS *to_symbol; +{ + abort (); +} +#endif + +void +s390_bss (ignore) + int ignore ATTRIBUTE_UNUSED; +{ + /* We don't support putting frags in the BSS segment, we fake it + by marking in_bss, then looking at s_skip for clues. */ + + subseg_set (bss_section, 0); + demand_empty_rest_of_line (); +} + +/* Pseudo-op handling. */ + +void +s390_insn(ignore) + int ignore ATTRIBUTE_UNUSED; +{ + expressionS exp; + const struct s390_opcode *opformat; + unsigned char insn[6]; + char *s; + + /* Get the opcode format. */ + s = input_line_pointer; + while (*s != '\0' && *s != ',' && ! isspace (*s)) + s++; + if (*s != ',') + as_bad (_("Invalid .insn format\n")); + *s++ = '\0'; + + /* Look up the opcode in the hash table. */ + opformat = (struct s390_opcode *) + hash_find (s390_opformat_hash, input_line_pointer); + if (opformat == (const struct s390_opcode *) NULL) { + as_bad (_("Unrecognized opcode format: `%s'"), input_line_pointer); + return; + } + input_line_pointer = s; + expression (&exp); + if (exp.X_op == O_constant) { + if (opformat->oplen == 4 || + (opformat->oplen == 2 && exp.X_op < 0x10000)) + md_number_to_chars (insn, exp.X_add_number, opformat->oplen); + else + as_bad(_("Invalid .insn format\n")); + } else if (exp.X_op == O_big) { + if (exp.X_add_number > 0 && + opformat->oplen == 6 && + generic_bignum[3] == 0) { + md_number_to_chars (insn, generic_bignum[2], 2); + md_number_to_chars (&insn[2], generic_bignum[1], 2); + md_number_to_chars (&insn[4], generic_bignum[0], 2); + } else + as_bad(_("Invalid .insn format\n")); + } else + as_bad (_("second operand of .insn not a constant\n")); + if (*input_line_pointer++ != ',') + as_bad (_("missing comma after insn constant\n")); + + if ((s = strchr(input_line_pointer, '\n')) != NULL) + *s = '\0'; + input_line_pointer = md_gather_operands (input_line_pointer, insn, opformat); + if (s != NULL) + *s = '\n'; + demand_empty_rest_of_line (); +} + +/* The .byte pseudo-op. This is similar to the normal .byte + pseudo-op, but it can also take a single ASCII string. */ + +static void +s390_byte (ignore) + int ignore ATTRIBUTE_UNUSED; +{ + if (*input_line_pointer != '\"') + { + cons (1); + return; + } + + /* Gather characters. A real double quote is doubled. Unusual + characters are not permitted. */ + ++input_line_pointer; + while (1) + { + char c; + + c = *input_line_pointer++; + + if (c == '\"') + { + if (*input_line_pointer != '\"') + break; + ++input_line_pointer; + } + + FRAG_APPEND_1_CHAR (c); + } + + demand_empty_rest_of_line (); +} + +/* The .ltorg pseudo-op.This emits all literals defined since the last + .ltorg or the invocation of gas. Literals are defined with the + @lit suffix. */ + +static void +s390_literals (ignore) + int ignore ATTRIBUTE_UNUSED; +{ + struct s390_lpe *lpe; + + if (lp_sym == NULL || lpe_count == 0) + return; /* nothing to be done */ + + /* Emit symbol for start of literal pool. */ + S_SET_SEGMENT (lp_sym, now_seg); + S_SET_VALUE (lp_sym, (valueT) frag_now_fix ()); + lp_sym->sy_frag = frag_now; + + while (lpe_list) { + lpe = lpe_list; + lpe_list = lpe_list->next; + S_SET_SEGMENT (lpe->sym, now_seg); + S_SET_VALUE (lpe->sym, (valueT) frag_now_fix ()); + lpe->sym->sy_frag = frag_now; + + /* Emit literal pool entry. */ + if (lpe->reloc != BFD_RELOC_UNUSED) { + reloc_howto_type *reloc_howto = + bfd_reloc_type_lookup (stdoutput, lpe->reloc); + int size = bfd_get_reloc_size (reloc_howto); + char *where; + + if (size > lpe->nbytes) + as_bad (_("%s relocations do not fit in %d bytes"), + reloc_howto->name, lpe->nbytes); + where = frag_more(lpe->nbytes); + md_number_to_chars (where, 0, size); + fix_new_exp (frag_now, where - frag_now->fr_literal, + size, &lpe->ex, reloc_howto->pc_relative, lpe->reloc); + } else { + if (lpe->ex.X_op == O_big) { + if (lpe->ex.X_add_number <= 0) + generic_floating_point_number = lpe->floatnum; + else + memcpy(generic_bignum, lpe->bignum, + lpe->ex.X_add_number*sizeof(LITTLENUM_TYPE)); + } + emit_expr (&lpe->ex, lpe->nbytes); + } + + lpe->next = lpe_free_list; + lpe_free_list = lpe; + } + lpe_list_tail = NULL; + lp_sym = NULL; + lp_count++; + lpe_count = 0; +} + +/* Turn a string in input_line_pointer into a floating point constant + of type type, and store the appropriate bytes in *litp. The number + of LITTLENUMS emitted is stored in *sizep . An error message is + returned, or NULL on OK. */ + +char * +md_atof (type, litp, sizep) + int type; + char *litp; + int *sizep; +{ + int prec; + LITTLENUM_TYPE words[4]; + char *t; + int i; + + switch (type) + { + case 'f': + prec = 2; + break; + + case 'd': + prec = 4; + break; + + default: + *sizep = 0; + return "bad call to md_atof"; + } + + t = atof_ieee (input_line_pointer, type, words); + if (t) + input_line_pointer = t; + + *sizep = prec * 2; + + for (i = 0; i < prec; i++) + { + md_number_to_chars (litp, (valueT) words[i], 2); + litp += 2; + } + + return NULL; +} + +/* Align a section (I don't know why this is machine dependent). */ + +valueT +md_section_align (seg, addr) + asection *seg; + valueT addr; +{ + int align = bfd_get_section_alignment (stdoutput, seg); + + return ((addr + (1 << align) - 1) & (-1 << align)); +} + +/* We don't have any form of relaxing. */ + +int +md_estimate_size_before_relax (fragp, seg) + fragS *fragp ATTRIBUTE_UNUSED; + asection *seg ATTRIBUTE_UNUSED; +{ + abort (); + return 0; +} + +/* Convert a machine dependent frag. We never generate these. */ + +void +md_convert_frag (abfd, sec, fragp) + bfd *abfd ATTRIBUTE_UNUSED; + asection *sec ATTRIBUTE_UNUSED; + fragS *fragp ATTRIBUTE_UNUSED; +{ + abort (); +} + +symbolS * +md_undefined_symbol (name) + char *name; +{ + if (*name == '_' && *(name+1) == 'G' + && strcmp(name, "_GLOBAL_OFFSET_TABLE_") == 0) + { + if(!GOT_symbol) + { + if(symbol_find(name)) + as_bad(_("GOT already in symbol table")); + GOT_symbol = symbol_new (name, undefined_section, + (valueT) 0, &zero_address_frag); + } + return GOT_symbol; + } + return 0; +} + +/* Functions concerning relocs. */ + +/* The location from which a PC relative jump should be calculated, + given a PC relative reloc. */ + +long +md_pcrel_from_section (fixp, sec) + fixS *fixp; + segT sec ATTRIBUTE_UNUSED; +{ + return fixp->fx_frag->fr_address + fixp->fx_where; +} + +/* Here we decide which fixups can be adjusted to make them relative to + the beginning of the section instead of the symbol. Basically we need + to make sure that the dynamic relocations are done correctly, so in + some cases we force the original symbol to be used. */ +int +tc_s390_fix_adjustable(fixP) + fixS * fixP; +{ + /* Prevent all adjustments to global symbols. */ + if (S_IS_EXTERN (fixP->fx_addsy)) + return 0; + if (S_IS_WEAK (fixP->fx_addsy)) + return 0; + /* adjust_reloc_syms doesn't know about the GOT. */ + if (fixP->fx_r_type == BFD_RELOC_32_GOTOFF + || fixP->fx_r_type == BFD_RELOC_390_PLT16DBL + || fixP->fx_r_type == BFD_RELOC_390_PLT32 + || fixP->fx_r_type == BFD_RELOC_390_PLT32DBL + || fixP->fx_r_type == BFD_RELOC_390_PLT64 + || fixP->fx_r_type == BFD_RELOC_390_GOT12 + || fixP->fx_r_type == BFD_RELOC_390_GOT16 + || fixP->fx_r_type == BFD_RELOC_32_GOT_PCREL + || fixP->fx_r_type == BFD_RELOC_390_GOT64 + || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT + || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) + return 0; + return 1; +} + +/* Apply a fixup to the object code. This is called for all the + fixups we generated by the call to fix_new_exp, above. In the call + above we used a reloc code which was the largest legal reloc code + plus the operand index. Here we undo that to recover the operand + index. At this point all symbol values should be fully resolved, + and we attempt to completely resolve the reloc. If we can not do + that, we determine the correct reloc code and put it back in the + fixup. */ + +int +md_apply_fix3 (fixp, valuep, seg) + fixS *fixp; + valueT *valuep; + segT seg ATTRIBUTE_UNUSED; +{ + char *where; + valueT value; + + value = *valuep; + where = fixp->fx_frag->fr_literal + fixp->fx_where; + + if (fixp->fx_subsy != NULL) { + if (!S_IS_DEFINED (fixp->fx_subsy)) + as_bad_where (fixp->fx_file, fixp->fx_line, + _("unresolved fx_subsy symbol that must be resolved")); + value -= S_GET_VALUE(fixp->fx_subsy); + } + + if (fixp->fx_addsy != NULL) { + /* `*valuep' may contain the value of the symbol on which the reloc + will be based; we have to remove it. */ + if (fixp->fx_addsy->sy_used_in_reloc + && S_GET_SEGMENT (fixp->fx_addsy) != absolute_section + && S_GET_SEGMENT (fixp->fx_addsy) != undefined_section + && ! bfd_is_com_section (S_GET_SEGMENT (fixp->fx_addsy))) + value -= S_GET_VALUE (fixp->fx_addsy); + + if (fixp->fx_pcrel) + value += fixp->fx_frag->fr_address + fixp->fx_where; + } else { + fixp->fx_done = 1; + } + + if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED) { + const struct s390_operand *operand; + int opindex; + + opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED; + operand = &s390_operands[opindex]; + + if (fixp->fx_done) { + /* Insert the fully resolved operand value. */ + s390_insert_operand (where, operand, (offsetT) value, + fixp->fx_file, fixp->fx_line); + return 1; + } + + /* Determine a BFD reloc value based on the operand information. + We are only prepared to turn a few of the operands into + relocs. */ + fixp->fx_offset = value; + if (operand->bits == 12 && operand->shift == 20) { + fixp->fx_size = 2; + fixp->fx_where += 2; + fixp->fx_r_type = BFD_RELOC_390_12; + } else if (operand->bits == 12 && operand->shift == 36) { + fixp->fx_size = 2; + fixp->fx_where += 4; + fixp->fx_r_type = BFD_RELOC_390_12; + } else if (operand->bits == 8 && operand->shift == 8) { + fixp->fx_size = 1; + fixp->fx_where += 1; + fixp->fx_r_type = BFD_RELOC_8; + } else if (operand->bits == 16 && operand->shift == 16) { + fixp->fx_size = 2; + fixp->fx_where += 2; + if (operand->flags & S390_OPERAND_PCREL) { + fixp->fx_r_type = BFD_RELOC_390_PC16DBL; + fixp->fx_offset += 2; + } else + fixp->fx_r_type = BFD_RELOC_16; + } else if (operand->bits == 32 && operand->shift == 16 && + (operand->flags & S390_OPERAND_PCREL)) { + fixp->fx_size = 4; + fixp->fx_where += 2; + fixp->fx_offset += 2; + fixp->fx_r_type = BFD_RELOC_390_PC32DBL; + } else { + char *sfile; + unsigned int sline; + + /* Use expr_symbol_where to see if this is an expression + symbol. */ + if (expr_symbol_where (fixp->fx_addsy, &sfile, &sline)) + as_bad_where (fixp->fx_file, fixp->fx_line, + _("unresolved expression that must be resolved")); + else + as_bad_where (fixp->fx_file, fixp->fx_line, + _("unsupported relocation type")); + fixp->fx_done = 1; + return 1; + } + } else { + switch (fixp->fx_r_type) { + case BFD_RELOC_8: + if (fixp->fx_pcrel) + abort (); + if (fixp->fx_done) + md_number_to_chars (where, value, 1); + break; + case BFD_RELOC_390_12: + case BFD_RELOC_390_GOT12: + if (fixp->fx_done) { + unsigned short mop; + mop = bfd_getb16 ((unsigned char *) where); + mop |= (unsigned short) (value & 0xfff); + bfd_putb16 ((bfd_vma) mop, (unsigned char *) where); + } + break; + + case BFD_RELOC_16: + case BFD_RELOC_GPREL16: + case BFD_RELOC_16_GOT_PCREL: + case BFD_RELOC_16_GOTOFF: + if (fixp->fx_pcrel) + as_bad_where (fixp->fx_file, fixp->fx_line, + "cannot emit PC relative %s relocation%s%s", + bfd_get_reloc_code_name (fixp->fx_r_type), + fixp->fx_addsy != NULL ? " against " : "", + (fixp->fx_addsy != NULL + ? S_GET_NAME (fixp->fx_addsy) + : "")); + if (fixp->fx_done) + md_number_to_chars (where, value, 2); + break; + case BFD_RELOC_390_GOT16: + if (fixp->fx_done) + md_number_to_chars (where, value, 2); + break; + case BFD_RELOC_390_PC16DBL: + case BFD_RELOC_390_PLT16DBL: + value += 2; + if (fixp->fx_done) + md_number_to_chars (where, (offsetT) value >> 1, 2); + break; + + case BFD_RELOC_32: + if (fixp->fx_pcrel) + fixp->fx_r_type = BFD_RELOC_32_PCREL; + else + fixp->fx_r_type = BFD_RELOC_32; + if (fixp->fx_done) + md_number_to_chars (where, value, 4); + break; + case BFD_RELOC_32_PCREL: + case BFD_RELOC_32_BASEREL: + fixp->fx_r_type = BFD_RELOC_32_PCREL; + if (fixp->fx_done) + md_number_to_chars (where, value, 4); + break; + case BFD_RELOC_32_GOT_PCREL: + case BFD_RELOC_390_PLT32: + if (fixp->fx_done) + md_number_to_chars (where, value, 4); + break; + case BFD_RELOC_390_PC32DBL: + case BFD_RELOC_390_PLT32DBL: + case BFD_RELOC_390_GOTPCDBL: + case BFD_RELOC_390_GOTENT: + value += 2; + if (fixp->fx_done) + md_number_to_chars (where, (offsetT) value >> 1, 4); + break; + + case BFD_RELOC_32_GOTOFF: + if (fixp->fx_done) + md_number_to_chars (where, value, sizeof(int)); + break; + + case BFD_RELOC_390_GOT64: + case BFD_RELOC_390_PLT64: + if (fixp->fx_done) + md_number_to_chars (where, value, 8); + break; + + case BFD_RELOC_64: + if (fixp->fx_pcrel) + fixp->fx_r_type = BFD_RELOC_64_PCREL; + else + fixp->fx_r_type = BFD_RELOC_64; + if (fixp->fx_done) + md_number_to_chars (where, value, 8); + break; + + case BFD_RELOC_64_PCREL: + fixp->fx_r_type = BFD_RELOC_64_PCREL; + if (fixp->fx_done) + md_number_to_chars (where, value, 8); + break; + + case BFD_RELOC_VTABLE_INHERIT: + case BFD_RELOC_VTABLE_ENTRY: + fixp->fx_done = 0; + return 1; + + default: { + const char *reloc_name = bfd_get_reloc_code_name(fixp->fx_r_type); + if (reloc_name != NULL) + fprintf(stderr, "Gas failure, reloc type %s\n", reloc_name); + else + fprintf(stderr, "Gas failure, reloc type #%i\n", fixp->fx_r_type); + fflush(stderr); + abort (); + } + } + + fixp->fx_offset = value; + } + + return 1; +} + +/* Generate a reloc for a fixup. */ + +arelent * +tc_gen_reloc (seg, fixp) + asection *seg ATTRIBUTE_UNUSED; + fixS *fixp; +{ + bfd_reloc_code_real_type code; + arelent *reloc; + + code = fixp->fx_r_type; + if (GOT_symbol && fixp->fx_addsy == GOT_symbol) { + if ((s390_arch_size == 32 && code == BFD_RELOC_32_PCREL) || + (s390_arch_size == 64 && code == BFD_RELOC_64_PCREL)) + code = BFD_RELOC_390_GOTPC; + if (code == BFD_RELOC_390_PC32DBL) + code = BFD_RELOC_390_GOTPCDBL; + } + + reloc = (arelent *) xmalloc (sizeof (arelent)); + reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); + *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); + reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; + reloc->howto = bfd_reloc_type_lookup (stdoutput, code); + if (reloc->howto == NULL) + { + as_bad_where (fixp->fx_file, fixp->fx_line, + _("cannot represent relocation type %s"), + bfd_get_reloc_code_name (code)); + /* Set howto to a garbage value so that we can keep going. */ + reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32); + assert (reloc->howto != NULL); + } + reloc->addend = fixp->fx_offset; + + return reloc; +} + |