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author | Jing Yu <jingyu@google.com> | 2011-01-30 22:09:54 -0800 |
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committer | Jing Yu <jingyu@google.com> | 2011-01-30 22:09:54 -0800 |
commit | a9a8b9e7e4aee6a3846ba62703283d10849bc0a6 (patch) | |
tree | bfd550c5e600ab0c227d3615fb5183127604870d /binutils-2.20.1/gas/config/tc-i370.c | |
parent | 8a5a8339de3149b7f99caf08e9cb72467d60cd01 (diff) | |
download | toolchain_binutils-a9a8b9e7e4aee6a3846ba62703283d10849bc0a6.zip toolchain_binutils-a9a8b9e7e4aee6a3846ba62703283d10849bc0a6.tar.gz toolchain_binutils-a9a8b9e7e4aee6a3846ba62703283d10849bc0a6.tar.bz2 |
Upgrade binutils and gold.
upgrade binutils-2.19 to binutils-2.20.1
upgrade gold to a relatively new version binutils-20100303
Before, both binutils and gold were built from binutils-2.19.
Now binutils will be built from binutils-2.20.1 and gold will
be built from binutils-20100303.
Change-Id: Ibd0130756723337d2b4783d5b1d5e5b02a1adc83
Diffstat (limited to 'binutils-2.20.1/gas/config/tc-i370.c')
-rw-r--r-- | binutils-2.20.1/gas/config/tc-i370.c | 2671 |
1 files changed, 2671 insertions, 0 deletions
diff --git a/binutils-2.20.1/gas/config/tc-i370.c b/binutils-2.20.1/gas/config/tc-i370.c new file mode 100644 index 0000000..3c7b140 --- /dev/null +++ b/binutils-2.20.1/gas/config/tc-i370.c @@ -0,0 +1,2671 @@ +/* tc-i370.c -- Assembler for the IBM 360/370/390 instruction set. + Loosely based on the ppc files by Linas Vepstas <linas@linas.org> 1998, 99 + Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, + 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc. + Written by Ian Lance Taylor, Cygnus Support. + + 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 3, 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. */ + +/* This assembler implements a very hacked version of an elf-like thing + that gcc emits (when gcc is suitably hacked). To make it behave more + HLASM-like, try turning on the -M or --mri flag (as there are various + similarities between HLASM and the MRI assemblers, such as section + names, lack of leading . in pseudo-ops, DC and DS, etc. */ + +#include "as.h" +#include "safe-ctype.h" +#include "subsegs.h" +#include "struc-symbol.h" + +#include "opcode/i370.h" + +#ifdef OBJ_ELF +#include "elf/i370.h" +#endif + +/* This is the assembler for the System/390 Architecture. */ + +/* Tell the main code what the endianness is. */ +extern int target_big_endian; + + +/* Generic assembler global variables which must be defined by all + targets. */ + +#ifdef OBJ_ELF +/* This string holds the chars that always start a comment. If the + pre-processor is disabled, these aren't very useful. The macro + tc_comment_chars points to this. We use this, rather than the + usual comment_chars, so that we can switch for Solaris conventions. */ +static const char i370_eabi_comment_chars[] = "#"; + +const char *i370_comment_chars = i370_eabi_comment_chars; +#else +const char comment_chars[] = "#"; +#endif + +/* 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"; + +void +md_show_usage (FILE *stream) +{ + fprintf (stream, "\ +S/370 options: (these have not yet been tested and may not work) \n\ +-u ignored\n\ +-mregnames Allow symbolic names for registers\n\ +-mno-regnames Do not allow symbolic names for registers\n"); +#ifdef OBJ_ELF + fprintf (stream, "\ +-mrelocatable support for GCC's -mrelocatble option\n\ +-mrelocatable-lib support for GCC's -mrelocatble-lib option\n\ +-V print assembler version number\n"); +#endif +} + +/* Whether to use user friendly register names. */ +#define TARGET_REG_NAMES_P TRUE + +static bfd_boolean reg_names_p = TARGET_REG_NAMES_P; + + +/* Predefined register names if -mregnames + In general, there are lots of them, in an attempt to be compatible + with a number of assemblers. */ + +/* Structure to hold information about predefined registers. */ +struct pd_reg + { + char *name; + int value; + }; + +/* List of registers that are pre-defined: + + Each general register has predefined names of the form: + 1. r<reg_num> which has the value <reg_num>. + 2. r.<reg_num> which has the value <reg_num>. + + Each floating point register has predefined names of the form: + 1. f<reg_num> which has the value <reg_num>. + 2. f.<reg_num> which has the value <reg_num>. + + There are only four floating point registers, and these are + commonly labelled 0,2,4 and 6. Thus, there is no f1, f3, etc. + + There are individual registers as well: + rbase or r.base has the value 3 (base register) + rpgt or r.pgt has the value 4 (page origin table pointer) + rarg or r.arg has the value 11 (argument pointer) + rtca or r.tca has the value 12 (table of contents pointer) + rtoc or r.toc has the value 12 (table of contents pointer) + sp or r.sp has the value 13 (stack pointer) + dsa or r.dsa has the value 13 (stack pointer) + lr has the value 14 (link reg) + + The table is sorted. Suitable for searching by a binary search. */ + +static const struct pd_reg pre_defined_registers[] = +{ + { "arg", 11 }, /* Argument Pointer. */ + { "base", 3 }, /* Base Reg. */ + + { "f.0", 0 }, /* Floating point registers. */ + { "f.2", 2 }, + { "f.4", 4 }, + { "f.6", 6 }, + + { "f0", 0 }, + { "f2", 2 }, + { "f4", 4 }, + { "f6", 6 }, + + { "dsa",13 }, /* Stack pointer. */ + { "lr", 14 }, /* Link Register. */ + { "pgt", 4 }, /* Page Origin Table Pointer. */ + + { "r.0", 0 }, /* General Purpose Registers. */ + { "r.1", 1 }, + { "r.10", 10 }, + { "r.11", 11 }, + { "r.12", 12 }, + { "r.13", 13 }, + { "r.14", 14 }, + { "r.15", 15 }, + { "r.2", 2 }, + { "r.3", 3 }, + { "r.4", 4 }, + { "r.5", 5 }, + { "r.6", 6 }, + { "r.7", 7 }, + { "r.8", 8 }, + { "r.9", 9 }, + + { "r.arg", 11 }, /* Argument Pointer. */ + { "r.base", 3 }, /* Base Reg. */ + { "r.dsa", 13 }, /* Stack Pointer. */ + { "r.pgt", 4 }, /* Page Origin Table Pointer. */ + { "r.sp", 13 }, /* Stack Pointer. */ + + { "r.tca", 12 }, /* Pointer to the table of contents. */ + { "r.toc", 12 }, /* Pointer to the table of contents. */ + + { "r0", 0 }, /* More 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 }, + + { "rbase", 3 }, /* Base Reg. */ + + { "rtca", 12 }, /* Pointer to the table of contents. */ + { "rtoc", 12 }, /* Pointer to the table of contents. */ + + { "sp", 13 }, /* 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 (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: An 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 bfd_boolean +register_name (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 if (!reg_names_p) + return FALSE; + + while (' ' == *name) + name = ++input_line_pointer; + + /* If it's a number, treat it as a number. If it's alpha, look to + see if it's in the register table. */ + if (!ISALPHA (name[0])) + reg_number = get_single_number (); + else + { + c = get_symbol_end (); + reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name); + + /* Put back the delimiting char. */ + *input_line_pointer = c; + } + + /* If numeric, make sure its not out of bounds. */ + if ((0 <= reg_number) && (16 >= reg_number)) + { + 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; + return TRUE; + } + + /* Reset the line as if we had not done anything. */ + input_line_pointer = start; + return FALSE; +} + +/* Local variables. */ + +/* The type of processor we are assembling for. This is one or more + of the I370_OPCODE flags defined in opcode/i370.h. */ +static int i370_cpu = 0; + +/* The base register to use for opcode with optional operands. + We define two of these: "text" and "other". Normally, "text" + would get used in the .text section for branches, while "other" + gets used in the .data section for address constants. + + The idea of a second base register in a different section + is foreign to the usual HLASM-style semantics; however, it + allows us to provide support for dynamically loaded libraries, + by allowing us to place address constants in a section other + than the text section. The "other" section need not be the + .data section, it can be any section that isn't the .text section. + + Note that HLASM defines a multiple, concurrent .using semantic + that we do not: in calculating offsets, it uses either the most + recent .using directive, or the one with the smallest displacement. + This allows HLASM to support a quasi-block-scope-like behaviour. + Handy for people writing assembly by hand ... but not supported + by us. */ +static int i370_using_text_regno = -1; +static int i370_using_other_regno = -1; + +/* The base address for address literals. */ +static expressionS i370_using_text_baseaddr; +static expressionS i370_using_other_baseaddr; + +/* the "other" section, used only for syntax error detection. */ +static segT i370_other_section = undefined_section; + +/* Opcode hash table. */ +static struct hash_control *i370_hash; + +/* Macro hash table. */ +static struct hash_control *i370_macro_hash; + +#ifdef OBJ_ELF +/* What type of shared library support to use. */ +static enum { SHLIB_NONE, SHLIB_PIC, SHILB_MRELOCATABLE } shlib = SHLIB_NONE; +#endif + +/* Flags to set in the elf header. */ +static flagword i370_flags = 0; + +#ifndef WORKING_DOT_WORD +int md_short_jump_size = 4; +int md_long_jump_size = 4; +#endif + +#ifdef OBJ_ELF +const char *md_shortopts = "l:um:K:VQ:"; +#else +const char *md_shortopts = "um:"; +#endif +struct option md_longopts[] = +{ + {NULL, no_argument, NULL, 0} +}; +size_t md_longopts_size = sizeof (md_longopts); + +int +md_parse_option (int c, char *arg) +{ + switch (c) + { + case 'u': + /* -u means that any undefined symbols should be treated as + external, which is the default for gas anyhow. */ + break; + +#ifdef OBJ_ELF + case 'K': + /* Recognize -K PIC */ + if (strcmp (arg, "PIC") == 0 || strcmp (arg, "pic") == 0) + { + shlib = SHLIB_PIC; + i370_flags |= EF_I370_RELOCATABLE_LIB; + } + else + return 0; + + break; +#endif + + case 'm': + + /* -m360 mean to assemble for the ancient 360 architecture. */ + if (strcmp (arg, "360") == 0 || strcmp (arg, "i360") == 0) + i370_cpu = I370_OPCODE_360; + /* -mxa means to assemble for the IBM 370 XA. */ + else if (strcmp (arg, "xa") == 0) + i370_cpu = I370_OPCODE_370_XA; + /* -many means to assemble for any architecture (370/XA). */ + else if (strcmp (arg, "any") == 0) + i370_cpu = I370_OPCODE_370; + + else if (strcmp (arg, "regnames") == 0) + reg_names_p = TRUE; + + else if (strcmp (arg, "no-regnames") == 0) + reg_names_p = FALSE; + +#ifdef OBJ_ELF + /* -mrelocatable/-mrelocatable-lib -- warn about + initializations that require relocation. */ + else if (strcmp (arg, "relocatable") == 0) + { + shlib = SHILB_MRELOCATABLE; + i370_flags |= EF_I370_RELOCATABLE; + } + else if (strcmp (arg, "relocatable-lib") == 0) + { + shlib = SHILB_MRELOCATABLE; + i370_flags |= EF_I370_RELOCATABLE_LIB; + } +#endif + else + { + as_bad (_("invalid switch -m%s"), arg); + return 0; + } + break; + +#ifdef OBJ_ELF + /* -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; + +#endif + + default: + return 0; + } + + return 1; +} + + +/* Set i370_cpu if it is not already set. + Currently defaults to the reasonable superset; + but can be made more fine grained if desred. */ + +static void +i370_set_cpu (void) +{ + const char *default_os = TARGET_OS; + const char *default_cpu = TARGET_CPU; + + /* Override with the superset for the moment. */ + i370_cpu = I370_OPCODE_ESA390_SUPERSET; + if (i370_cpu == 0) + { + if (strcmp (default_cpu, "i360") == 0) + i370_cpu = I370_OPCODE_360; + else if (strcmp (default_cpu, "i370") == 0) + i370_cpu = I370_OPCODE_370; + else if (strcmp (default_cpu, "XA") == 0) + i370_cpu = I370_OPCODE_370_XA; + else + as_fatal ("Unknown default cpu = %s, os = %s", default_cpu, default_os); + } +} + +/* Figure out the BFD architecture to use. + FIXME: specify the different 370 architectures. */ + +enum bfd_architecture +i370_arch (void) +{ + return bfd_arch_i370; +} + +/* 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 (void) +{ + const struct i370_opcode *op; + const struct i370_opcode *op_end; + const struct i370_macro *macro; + const struct i370_macro *macro_end; + bfd_boolean dup_insn = FALSE; + + i370_set_cpu (); + +#ifdef OBJ_ELF + /* Set the ELF flags if desired. */ + if (i370_flags) + bfd_set_private_flags (stdoutput, i370_flags); +#endif + + /* Insert the opcodes into a hash table. */ + i370_hash = hash_new (); + + op_end = i370_opcodes + i370_num_opcodes; + for (op = i370_opcodes; op < op_end; op++) + { + know ((op->opcode.i[0] & op->mask.i[0]) == op->opcode.i[0] + && (op->opcode.i[1] & op->mask.i[1]) == op->opcode.i[1]); + + if ((op->flags & i370_cpu) != 0) + { + const char *retval; + + retval = hash_insert (i370_hash, op->name, (void *) op); + if (retval != (const char *) NULL) + { + as_bad (_("Internal assembler error for instruction %s"), op->name); + dup_insn = TRUE; + } + } + } + + /* Insert the macros into a hash table. */ + i370_macro_hash = hash_new (); + + macro_end = i370_macros + i370_num_macros; + for (macro = i370_macros; macro < macro_end; macro++) + { + if ((macro->flags & i370_cpu) != 0) + { + const char *retval; + + retval = hash_insert (i370_macro_hash, macro->name, (void *) macro); + if (retval != (const char *) NULL) + { + as_bad (_("Internal assembler error for macro %s"), macro->name); + dup_insn = TRUE; + } + } + } + + if (dup_insn) + abort (); +} + +/* Insert an operand value into an instruction. */ + +static i370_insn_t +i370_insert_operand (i370_insn_t insn, + const struct i370_operand *operand, + offsetT val) +{ + if (operand->insert) + { + const char *errmsg; + + /* Used for 48-bit insn's. */ + errmsg = NULL; + insn = (*operand->insert) (insn, (long) val, &errmsg); + if (errmsg) + as_bad ("%s", errmsg); + } + else + /* This is used only for 16, 32 bit insn's. */ + insn.i[0] |= (((long) val & ((1 << operand->bits) - 1)) + << operand->shift); + + return insn; +} + + +#ifdef OBJ_ELF +/* Parse @got, etc. and return the desired relocation. + Currently, i370 does not support (don't really need to support) any + of these fancier markups ... for example, no one is going to + write 'L 6,=V(bogus)@got' it just doesn't make sense (at least to me). + So basically, we could get away with this routine returning + BFD_RELOC_UNUSED in all circumstances. However, I'll leave + in for now in case someone ambitious finds a good use for this stuff ... + this routine was pretty much just copied from the powerpc code ... */ + +static bfd_reloc_code_real_type +i370_elf_suffix (char **str_p, expressionS *exp_p) +{ + struct map_bfd + { + char *string; + int length; + bfd_reloc_code_real_type reloc; + }; + + char ident[20]; + char *str = *str_p; + char *str2; + int ch; + int len; + struct map_bfd *ptr; + +#define MAP(str,reloc) { str, sizeof (str) - 1, reloc } + + static struct map_bfd mapping[] = + { + /* warnings with -mrelocatable. */ + MAP ("fixup", BFD_RELOC_CTOR), + { (char *)0, 0, BFD_RELOC_UNUSED } + }; + + if (*str++ != '@') + return BFD_RELOC_UNUSED; + + for (ch = *str, str2 = ident; + (str2 < ident + sizeof (ident) - 1 + && (ISALNUM (ch) || ch == '@')); + ch = *++str) + *str2++ = TOLOWER (ch); + + *str2 = '\0'; + len = str2 - ident; + + ch = ident[0]; + for (ptr = &mapping[0]; ptr->length > 0; ptr++) + if (ch == ptr->string[0] + && len == ptr->length + && memcmp (ident, ptr->string, ptr->length) == 0) + { + if (exp_p->X_add_number != 0 + && (ptr->reloc == BFD_RELOC_16_GOTOFF + || ptr->reloc == BFD_RELOC_LO16_GOTOFF + || ptr->reloc == BFD_RELOC_HI16_GOTOFF + || ptr->reloc == BFD_RELOC_HI16_S_GOTOFF)) + as_warn (_("identifier+constant@got means identifier@got+constant")); + + /* 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); + if (new_exp.X_op == O_constant) + { + exp_p->X_add_number += new_exp.X_add_number; + str = input_line_pointer; + } + + if (&input_line_pointer != str_p) + input_line_pointer = orig_line; + } + + *str_p = str; + return ptr->reloc; + } + + return BFD_RELOC_UNUSED; +} + +/* Like normal .long/.short/.word, except support @got, etc. + Clobbers input_line_pointer, checks end-of-line. */ + +static void +i370_elf_cons (int nbytes) /* 1=.byte, 2=.word, 4=.long. */ +{ + expressionS exp; + bfd_reloc_code_real_type reloc; + + if (is_it_end_of_statement ()) + { + demand_empty_rest_of_line (); + return; + } + + do + { + expression (&exp); + + if (exp.X_op == O_symbol + && *input_line_pointer == '@' + && (reloc = i370_elf_suffix (&input_line_pointer, &exp)) != BFD_RELOC_UNUSED) + { + reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc); + int size = bfd_get_reloc_size (reloc_howto); + + if (size > nbytes) + as_bad (_("%s relocations do not fit in %d bytes\n"), + reloc_howto->name, nbytes); + else + { + char *p = frag_more ((int) nbytes); + int offset = nbytes - size; + + fix_new_exp (frag_now, p - frag_now->fr_literal + offset, size, &exp, 0, reloc); + } + } + else + emit_expr (&exp, (unsigned int) nbytes); + } + while (*input_line_pointer++ == ','); + + input_line_pointer--; /* Put terminator back into stream. */ + demand_empty_rest_of_line (); +} + + +/* ASCII to EBCDIC conversion table. */ +static unsigned char ascebc[256] = +{ + /*00 NL SH SX EX ET NQ AK BL */ + 0x00, 0x01, 0x02, 0x03, 0x37, 0x2D, 0x2E, 0x2F, + /*08 BS HT LF VT FF CR SO SI */ + 0x16, 0x05, 0x15, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + /*10 DL D1 D2 D3 D4 NK SN EB */ + 0x10, 0x11, 0x12, 0x13, 0x3C, 0x3D, 0x32, 0x26, + /*18 CN EM SB EC FS GS RS US */ + 0x18, 0x19, 0x3F, 0x27, 0x1C, 0x1D, 0x1E, 0x1F, + /*20 SP ! " # $ % & ' */ + 0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D, + /*28 ( ) * + , - . / */ + 0x4D, 0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61, + /*30 0 1 2 3 4 5 6 7 */ + 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, + /*38 8 9 : ; < = > ? */ + 0xF8, 0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F, + /*40 @ A B C D E F G */ + 0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, + /*48 H I J K L M N O */ + 0xC8, 0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, + /*50 P Q R S T U V W */ + 0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, + /*58 X Y Z [ \ ] ^ _ */ + 0xE7, 0xE8, 0xE9, 0xAD, 0xE0, 0xBD, 0x5F, 0x6D, + /*60 ` a b c d e f g */ + 0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, + /*68 h i j k l m n o */ + 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, + /*70 p q r s t u v w */ + 0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, + /*78 x y z { | } ~ DL */ + 0xA7, 0xA8, 0xA9, 0xC0, 0x4F, 0xD0, 0xA1, 0x07, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, + 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0xFF +}; + +/* EBCDIC to ASCII conversion table. */ +unsigned char ebcasc[256] = +{ + /*00 NU SH SX EX PF HT LC DL */ + 0x00, 0x01, 0x02, 0x03, 0x00, 0x09, 0x00, 0x7F, + /*08 SM VT FF CR SO SI */ + 0x00, 0x00, 0x00, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + /*10 DE D1 D2 TM RS NL BS IL */ + 0x10, 0x11, 0x12, 0x13, 0x14, 0x0A, 0x08, 0x00, + /*18 CN EM CC C1 FS GS RS US */ + 0x18, 0x19, 0x00, 0x00, 0x1C, 0x1D, 0x1E, 0x1F, + /*20 DS SS FS BP LF EB EC */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x17, 0x1B, + /*28 SM C2 EQ AK BL */ + 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07, 0x00, + /*30 SY PN RS UC ET */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, + /*38 C3 D4 NK SU */ + 0x00, 0x00, 0x00, 0x00, 0x14, 0x15, 0x00, 0x1A, + /*40 SP */ + 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*48 . < ( + | */ + 0x00, 0x00, 0x00, 0x2E, 0x3C, 0x28, 0x2B, 0x7C, + /*50 & */ + 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*58 ! $ * ) ; ^ */ + 0x00, 0x00, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E, + /*60 - / */ + 0x2D, 0x2F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*68 , % _ > ? */ + 0x00, 0x00, 0x00, 0x2C, 0x25, 0x5F, 0x3E, 0x3F, + /*70 */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*78 ` : # @ ' = " */ + 0x00, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22, + /*80 a b c d e f g */ + 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, + /*88 h i { */ + 0x68, 0x69, 0x00, 0x7B, 0x00, 0x00, 0x00, 0x00, + /*90 j k l m n o p */ + 0x00, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, + /*98 q r } */ + 0x71, 0x72, 0x00, 0x7D, 0x00, 0x00, 0x00, 0x00, + /*A0 ~ s t u v w x */ + 0x00, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, + /*A8 y z [ */ + 0x79, 0x7A, 0x00, 0x00, 0x00, 0x5B, 0x00, 0x00, + /*B0 */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*B8 ] */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x5D, 0x00, 0x00, + /*C0 { A B C D E F G */ + 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, + /*C8 H I */ + 0x48, 0x49, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*D0 } J K L M N O P */ + 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, + /*D8 Q R */ + 0x51, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*E0 \ S T U V W X */ + 0x5C, 0x00, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, + /*E8 Y Z */ + 0x59, 0x5A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /*F0 0 1 2 3 4 5 6 7 */ + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, + /*F8 8 9 */ + 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF +}; + +/* EBCDIC translation tables needed for 3270 support. */ + +static void +i370_ebcdic (int unused ATTRIBUTE_UNUSED) +{ + char *p, *end; + char delim = 0; + size_t nbytes; + + nbytes = strlen (input_line_pointer); + end = input_line_pointer + nbytes; + while ('\r' == *end) end --; + while ('\n' == *end) end --; + + delim = *input_line_pointer; + if (('\'' == delim) || ('\"' == delim)) + { + input_line_pointer ++; + end = rindex (input_line_pointer, delim); + } + + if (end > input_line_pointer) + { + nbytes = end - input_line_pointer +1; + p = frag_more (nbytes); + while (end > input_line_pointer) + { + *p = ascebc [(unsigned char) (*input_line_pointer)]; + ++p; ++input_line_pointer; + } + *p = '\0'; + } + if (delim == *input_line_pointer) ++input_line_pointer; +} + + +/* Stub out a couple of routines. */ + +static void +i370_rmode (int unused ATTRIBUTE_UNUSED) +{ + as_tsktsk ("rmode ignored"); +} + +static void +i370_dsect (int sect) +{ + char *save_line = input_line_pointer; + static char section[] = ".data\n"; + + /* Just pretend this is .section .data. */ + input_line_pointer = section; + obj_elf_section (sect); + + input_line_pointer = save_line; +} + +static void +i370_csect (int unused ATTRIBUTE_UNUSED) +{ + as_tsktsk ("csect not supported"); +} + + +/* DC Define Const is only partially supported. + For samplecode on what to do, look at i370_elf_cons() above. + This code handles pseudoops of the style + DC D'3.141592653' # in sysv4, .double 3.14159265 + DC F'1' # in sysv4, .long 1. */ + +static void +i370_dc (int unused ATTRIBUTE_UNUSED) +{ + char * p, tmp[50]; + int nbytes=0; + expressionS exp; + char type=0; + + if (is_it_end_of_statement ()) + { + demand_empty_rest_of_line (); + return; + } + + /* Figure out the size. */ + type = *input_line_pointer++; + switch (type) + { + case 'H': /* 16-bit */ + nbytes = 2; + break; + case 'E': /* 32-bit */ + case 'F': /* 32-bit */ + nbytes = 4; + break; + case 'D': /* 64-bit */ + nbytes = 8; + break; + default: + as_bad (_("unsupported DC type")); + return; + } + + /* Get rid of pesky quotes. */ + if ('\'' == *input_line_pointer) + { + char * close; + + ++input_line_pointer; + close = strchr (input_line_pointer, '\''); + if (close) + *close= ' '; + else + as_bad (_("missing end-quote")); + } + + if ('\"' == *input_line_pointer) + { + char * close; + + ++input_line_pointer; + close = strchr (input_line_pointer, '\"'); + if (close) + *close= ' '; + else + as_bad (_("missing end-quote")); + } + + switch (type) + { + case 'H': /* 16-bit */ + case 'F': /* 32-bit */ + expression (&exp); + emit_expr (&exp, nbytes); + break; + case 'E': /* 32-bit */ + type = 'f'; + case 'D': /* 64-bit */ + md_atof (type, tmp, &nbytes); + p = frag_more (nbytes); + memcpy (p, tmp, nbytes); + break; + default: + as_bad (_("unsupported DC type")); + return; + } + + demand_empty_rest_of_line (); +} + + +/* Provide minimal support for DS Define Storage. */ + +static void +i370_ds (int unused ATTRIBUTE_UNUSED) +{ + /* DS 0H or DS 0F or DS 0D. */ + if ('0' == *input_line_pointer) + { + int alignment = 0; /* Left shift 1 << align. */ + input_line_pointer ++; + switch (*input_line_pointer++) + { + case 'H': /* 16-bit */ + alignment = 1; + break; + case 'F': /* 32-bit */ + alignment = 2; + break; + case 'D': /* 64-bit */ + alignment = 3; + break; + default: + as_bad (_("unsupported alignment")); + return; + } + frag_align (alignment, 0, 0); + record_alignment (now_seg, alignment); + } + else + as_bad (_("this DS form not yet supported")); +} + +/* Solaris pseudo op to change to the .rodata section. */ + +static void +i370_elf_rdata (int sect) +{ + char *save_line = input_line_pointer; + static char section[] = ".rodata\n"; + + /* Just pretend this is .section .rodata. */ + input_line_pointer = section; + obj_elf_section (sect); + + input_line_pointer = save_line; +} + +/* Pseudo op to make file scope bss items. */ + +static void +i370_elf_lcomm (int unused ATTRIBUTE_UNUSED) +{ + char *name; + char c; + char *p; + offsetT size; + symbolS *symbolP; + offsetT align; + segT old_sec; + int old_subsec; + char *pfrag; + int align2; + + name = input_line_pointer; + c = get_symbol_end (); + + /* Just after name is now '\0'. */ + p = input_line_pointer; + *p = c; + SKIP_WHITESPACE (); + if (*input_line_pointer != ',') + { + as_bad (_("Expected comma after symbol-name: rest of line ignored.")); + ignore_rest_of_line (); + return; + } + + /* Skip ','. */ + input_line_pointer++; + if ((size = get_absolute_expression ()) < 0) + { + as_warn (_(".COMMon length (%ld.) <0! Ignored."), (long) size); + ignore_rest_of_line (); + return; + } + + /* The third argument to .lcomm is the alignment. */ + if (*input_line_pointer != ',') + align = 8; + else + { + ++input_line_pointer; + align = get_absolute_expression (); + if (align <= 0) + { + as_warn (_("ignoring bad alignment")); + align = 8; + } + } + + *p = 0; + symbolP = symbol_find_or_make (name); + *p = c; + + if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) + { + as_bad (_("Ignoring attempt to re-define symbol `%s'."), + S_GET_NAME (symbolP)); + ignore_rest_of_line (); + return; + } + + if (S_GET_VALUE (symbolP) && S_GET_VALUE (symbolP) != (valueT) size) + { + as_bad (_("Length of .lcomm \"%s\" is already %ld. Not changed to %ld."), + S_GET_NAME (symbolP), + (long) S_GET_VALUE (symbolP), + (long) size); + + ignore_rest_of_line (); + return; + } + + /* Allocate_bss: */ + old_sec = now_seg; + old_subsec = now_subseg; + if (align) + { + /* Convert to a power of 2 alignment. */ + for (align2 = 0; (align & 1) == 0; align >>= 1, ++align2) + ; + if (align != 1) + { + as_bad (_("Common alignment not a power of 2")); + ignore_rest_of_line (); + return; + } + } + else + align2 = 0; + + record_alignment (bss_section, align2); + subseg_set (bss_section, 0); + if (align2) + frag_align (align2, 0, 0); + if (S_GET_SEGMENT (symbolP) == bss_section) + symbol_get_frag (symbolP)->fr_symbol = 0; + symbol_set_frag (symbolP, frag_now); + pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size, + (char *) 0); + *pfrag = 0; + S_SET_SIZE (symbolP, size); + S_SET_SEGMENT (symbolP, bss_section); + subseg_set (old_sec, old_subsec); + demand_empty_rest_of_line (); +} + +/* Validate any relocations emitted for -mrelocatable, possibly adding + fixups for word relocations in writable segments, so we can adjust + them at runtime. */ + +static void +i370_elf_validate_fix (fixS *fixp, segT seg) +{ + if (fixp->fx_done || fixp->fx_pcrel) + return; + + switch (shlib) + { + case SHLIB_NONE: + case SHLIB_PIC: + return; + + case SHILB_MRELOCATABLE: + if (fixp->fx_r_type <= BFD_RELOC_UNUSED + && fixp->fx_r_type != BFD_RELOC_16_GOTOFF + && fixp->fx_r_type != BFD_RELOC_HI16_GOTOFF + && fixp->fx_r_type != BFD_RELOC_LO16_GOTOFF + && fixp->fx_r_type != BFD_RELOC_HI16_S_GOTOFF + && fixp->fx_r_type != BFD_RELOC_32_BASEREL + && fixp->fx_r_type != BFD_RELOC_LO16_BASEREL + && fixp->fx_r_type != BFD_RELOC_HI16_BASEREL + && fixp->fx_r_type != BFD_RELOC_HI16_S_BASEREL + && strcmp (segment_name (seg), ".got2") != 0 + && strcmp (segment_name (seg), ".dtors") != 0 + && strcmp (segment_name (seg), ".ctors") != 0 + && strcmp (segment_name (seg), ".fixup") != 0 + && strcmp (segment_name (seg), ".stab") != 0 + && strcmp (segment_name (seg), ".gcc_except_table") != 0 + && strcmp (segment_name (seg), ".ex_shared") != 0) + { + if ((seg->flags & (SEC_READONLY | SEC_CODE)) != 0 + || fixp->fx_r_type != BFD_RELOC_CTOR) + as_bad_where (fixp->fx_file, fixp->fx_line, + "Relocation cannot be done when using -mrelocatable"); + } + return; + default: + break; + } +} +#endif /* OBJ_ELF */ + + +#define LITERAL_POOL_SUPPORT +#ifdef LITERAL_POOL_SUPPORT +/* Provide support for literal pools within the text section. + Loosely based on similar code from tc-arm.c. + We will use four symbols to locate four parts of the literal pool. + These four sections contain 64,32,16 and 8-bit constants; we use + four sections so that all memory access can be appropriately aligned. + That is, we want to avoid mixing these together so that we don't + waste space padding out to alignments. The four pointers + longlong_poolP, word_poolP, etc. point to a symbol labeling the + start of each pool part. + + lit_pool_num increments from zero to infinity and uniquely id's + -- its used to generate the *_poolP symbol name. */ + +#define MAX_LITERAL_POOL_SIZE 1024 + +typedef struct literalS +{ + struct expressionS exp; + char * sym_name; + char size; /* 1,2,4 or 8 */ + short offset; +} literalT; + +literalT literals[MAX_LITERAL_POOL_SIZE]; +int next_literal_pool_place = 0; /* Next free entry in the pool. */ + +static symbolS *longlong_poolP = NULL; /* 64-bit pool entries. */ +static symbolS *word_poolP = NULL; /* 32-bit pool entries. */ +static symbolS *short_poolP = NULL; /* 16-bit pool entries. */ +static symbolS *byte_poolP = NULL; /* 8-bit pool entries. */ + +static int lit_pool_num = 1; + +/* Create a new, empty symbol. */ +static symbolS * +symbol_make_empty (void) +{ + return symbol_create (FAKE_LABEL_NAME, undefined_section, + (valueT) 0, &zero_address_frag); +} + +/* Make the first argument an address-relative expression + by subtracting the second argument. */ + +static void +i370_make_relative (expressionS *exx, expressionS *baseaddr) +{ + if (O_constant == baseaddr->X_op) + { + exx->X_op = O_symbol; + exx->X_add_number -= baseaddr->X_add_number; + } + else if (O_symbol == baseaddr->X_op) + { + exx->X_op = O_subtract; + exx->X_op_symbol = baseaddr->X_add_symbol; + exx->X_add_number -= baseaddr->X_add_number; + } + else if (O_uminus == baseaddr->X_op) + { + exx->X_op = O_add; + exx->X_op_symbol = baseaddr->X_add_symbol; + exx->X_add_number += baseaddr->X_add_number; + } + else + as_bad (_("Missing or bad .using directive")); +} +/* Add an expression to the literal pool. */ + +static void +add_to_lit_pool (expressionS *exx, char *name, int sz) +{ + int lit_count = 0; + int offset_in_pool = 0; + + /* Start a new pool, if necessary. */ + if (8 == sz && NULL == longlong_poolP) + longlong_poolP = symbol_make_empty (); + else if (4 == sz && NULL == word_poolP) + word_poolP = symbol_make_empty (); + else if (2 == sz && NULL == short_poolP) + short_poolP = symbol_make_empty (); + else if (1 == sz && NULL == byte_poolP) + byte_poolP = symbol_make_empty (); + + /* Check if this literal value is already in the pool. + FIXME: We should probably be checking expressions + of type O_symbol as well. + FIXME: This is probably(certainly?) broken for O_big, + which includes 64-bit long-longs. */ + while (lit_count < next_literal_pool_place) + { + if (exx->X_op == O_constant + && literals[lit_count].exp.X_op == exx->X_op + && literals[lit_count].exp.X_add_number == exx->X_add_number + && literals[lit_count].exp.X_unsigned == exx->X_unsigned + && literals[lit_count].size == sz) + break; + else if (literals[lit_count].sym_name + && name + && !strcmp (name, literals[lit_count].sym_name)) + break; + if (sz == literals[lit_count].size) + offset_in_pool += sz; + lit_count ++; + } + + if (lit_count == next_literal_pool_place) /* new entry */ + { + if (next_literal_pool_place > MAX_LITERAL_POOL_SIZE) + as_bad (_("Literal Pool Overflow")); + + literals[next_literal_pool_place].exp = *exx; + literals[next_literal_pool_place].size = sz; + literals[next_literal_pool_place].offset = offset_in_pool; + if (name) + literals[next_literal_pool_place].sym_name = strdup (name); + else + literals[next_literal_pool_place].sym_name = NULL; + next_literal_pool_place++; + } + + /* ???_poolP points to the beginning of the literal pool. + X_add_number is the offset from the beginning of the + literal pool to this expr minus the location of the most + recent .using directive. Thus, the grand total value of the + expression is the distance from .using to the literal. */ + if (8 == sz) + exx->X_add_symbol = longlong_poolP; + else if (4 == sz) + exx->X_add_symbol = word_poolP; + else if (2 == sz) + exx->X_add_symbol = short_poolP; + else if (1 == sz) + exx->X_add_symbol = byte_poolP; + exx->X_add_number = offset_in_pool; + exx->X_op_symbol = NULL; + + /* If the user has set up a base reg in another section, + use that; otherwise use the text section. */ + if (0 < i370_using_other_regno) + i370_make_relative (exx, &i370_using_other_baseaddr); + else + i370_make_relative (exx, &i370_using_text_baseaddr); +} + +/* The symbol setup for the literal pool is done in two steps. First, + a symbol that represents the start of the literal pool is created, + above, in the add_to_pool() routine. This sym ???_poolP. + However, we don't know what fragment its in until a bit later. + So we defer the frag_now thing, and the symbol name, until .ltorg time. */ + +/* Can't use symbol_new here, so have to create a symbol and then at + a later date assign it a value. Thats what these functions do. */ + +static void +symbol_locate (symbolS *symbolP, + const char *name, /* It is copied, the caller can modify. */ + segT segment, /* Segment identifier (SEG_<something>). */ + valueT valu, /* Symbol value. */ + fragS *frag) /* Associated fragment. */ +{ + size_t name_length; + char *preserved_copy_of_name; + + name_length = strlen (name) + 1; /* +1 for \0 */ + obstack_grow (¬es, name, name_length); + preserved_copy_of_name = obstack_finish (¬es); + + S_SET_NAME (symbolP, preserved_copy_of_name); + + S_SET_SEGMENT (symbolP, segment); + S_SET_VALUE (symbolP, valu); + symbol_clear_list_pointers (symbolP); + + symbol_set_frag (symbolP, frag); + + /* Link to end of symbol chain. */ + { + extern int symbol_table_frozen; + + if (symbol_table_frozen) + abort (); + } + + symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); + + obj_symbol_new_hook (symbolP); + +#ifdef tc_symbol_new_hook + tc_symbol_new_hook (symbolP); +#endif + +#define DEBUG_SYMS +#ifdef DEBUG_SYMS + verify_symbol_chain(symbol_rootP, symbol_lastP); +#endif /* DEBUG_SYMS */ +} + +/* i370_addr_offset() will convert operand expressions + that appear to be absolute into thier base-register + relative form. These expressions come in two types: + + (1) of the form "* + const" * where "*" means + relative offset since the last using + i.e. "*" means ".-using_baseaddr" + + (2) labels, which are never absolute, but are always + relative to the last "using". Anything with an alpha + character is considered to be a label (since symbols + can never be operands), and since we've already handled + register operands. For example, "BL .L33" branch low + to .L33 RX form insn frequently terminates for-loops. */ + +static bfd_boolean +i370_addr_offset (expressionS *exx) +{ + char *dot, *lab; + int islabel = 0; + int all_digits = 0; + + /* Search for a label; anything with an alpha char will do. + Local labels consist of N digits followed by either b or f. */ + lab = input_line_pointer; + while (*lab && (',' != *lab) && ('(' != *lab)) + { + if (ISDIGIT (*lab)) + all_digits = 1; + else if (ISALPHA (*lab)) + { + if (!all_digits) + { + islabel = 1; + break; + } + else if (('f' == *lab) || ('b' == *lab)) + { + islabel = 1; + break; + } + if (all_digits) + break; + } + else if ('.' != *lab) + break; + ++lab; + } + + /* See if operand has a * in it. */ + dot = strchr (input_line_pointer, '*'); + + if (!dot && !islabel) + return FALSE; + + /* Replace * with . and let expr munch on it. */ + if (dot) + *dot = '.'; + expression (exx); + + /* OK, now we have to subtract the "using" location. + Normally branches appear in the text section only. */ + if (0 == strncmp (now_seg->name, ".text", 5) || 0 > i370_using_other_regno) + i370_make_relative (exx, &i370_using_text_baseaddr); + else + i370_make_relative (exx, &i370_using_other_baseaddr); + + /* Put the * back. */ + if (dot) + *dot = '*'; + + return TRUE; +} + +/* Handle address constants of various sorts. */ +/* The currently supported types are + =A(some_symb) + =V(some_extern) + =X'deadbeef' hexadecimal + =F'1234' 32-bit const int + =H'1234' 16-bit const int. */ + +static bfd_boolean +i370_addr_cons (expressionS *exp) +{ + char *name; + char *sym_name, delim; + int name_len; + int hex_len = 0; + int cons_len = 0; + + name = input_line_pointer; + sym_name = input_line_pointer; + /* Find the spelling of the operand. */ + if (name[0] == '=' && ISALPHA (name[1])) + name = ++input_line_pointer; + else + return FALSE; + + switch (name[0]) + { + case 'A': /* A == address-of. */ + case 'V': /* V == extern. */ + ++input_line_pointer; + expression (exp); + + /* We use a simple string name to collapse together + multiple refrences to the same address literal. */ + name_len = strcspn (sym_name, ", "); + delim = *(sym_name + name_len); + *(sym_name + name_len) = 0x0; + add_to_lit_pool (exp, sym_name, 4); + *(sym_name + name_len) = delim; + + break; + case 'H': + case 'F': + case 'X': + case 'E': /* Single-precision float point. */ + case 'D': /* Double-precision float point. */ + + /* H == 16-bit fixed-point const; expression must be const. */ + /* F == fixed-point const; expression must be const. */ + /* X == fixed-point const; expression must be const. */ + if ('H' == name[0]) cons_len = 2; + else if ('F' == name[0]) cons_len = 4; + else if ('X' == name[0]) cons_len = -1; + else if ('E' == name[0]) cons_len = 4; + else if ('D' == name[0]) cons_len = 8; + + /* Extract length, if it is present; + FIXME: assume single-digit length. */ + if ('L' == name[1]) + { + /* Should work for ASCII and EBCDIC. */ + cons_len = name[2] - '0'; + input_line_pointer += 2; + } + + ++input_line_pointer; + + /* Get rid of pesky quotes. */ + if ('\'' == *input_line_pointer) + { + char * close; + ++input_line_pointer; + close = strchr (input_line_pointer, '\''); + if (close) + *close= ' '; + else + as_bad (_("missing end-quote")); + } + if ('\"' == *input_line_pointer) + { + char * close; + ++input_line_pointer; + close = strchr (input_line_pointer, '\"'); + if (close) + *close= ' '; + else + as_bad (_("missing end-quote")); + } + if (('X' == name[0]) || ('E' == name[0]) || ('D' == name[0])) + { + char tmp[50]; + char *save; + + /* The length of hex constants is specified directly with L, + or implied through the number of hex digits. For example: + =X'AB' one byte + =X'abcd' two bytes + =X'000000AB' four bytes + =XL4'AB' four bytes, left-padded withn zero. */ + if (('X' == name[0]) && (0 > cons_len)) + { + save = input_line_pointer; + while (*save) + { + if (ISXDIGIT (*save)) + hex_len++; + save++; + } + cons_len = (hex_len+1) /2; + } + /* I believe this works even for =XL8'dada0000beeebaaa' + which should parse out to X_op == O_big + Note that floats and doubles get represented as + 0d3.14159265358979 or 0f 2.7. */ + tmp[0] = '0'; + tmp[1] = name[0]; + tmp[2] = 0; + strcat (tmp, input_line_pointer); + save = input_line_pointer; + input_line_pointer = tmp; + expression (exp); + input_line_pointer = save + (input_line_pointer-tmp-2); + + /* Fix up lengths for floats and doubles. */ + if (O_big == exp->X_op) + exp->X_add_number = cons_len / CHARS_PER_LITTLENUM; + } + else + expression (exp); + + /* O_big occurs when more than 4 bytes worth gets parsed. */ + if ((exp->X_op != O_constant) && (exp->X_op != O_big)) + { + as_bad (_("expression not a constant")); + return FALSE; + } + add_to_lit_pool (exp, 0x0, cons_len); + break; + + default: + as_bad (_("Unknown/unsupported address literal type")); + return FALSE; + } + + return TRUE; +} + + +/* Dump the contents of the literal pool that we've accumulated so far. + This aligns the pool to the size of the largest literal in the pool. */ + +static void +i370_ltorg (int ignore ATTRIBUTE_UNUSED) +{ + int litsize; + int lit_count = 0; + int biggest_literal_size = 0; + int biggest_align = 0; + char pool_name[20]; + + if (strncmp (now_seg->name, ".text", 5)) + { + if (i370_other_section == undefined_section) + as_bad (_(".ltorg without prior .using in section %s"), + now_seg->name); + + if (i370_other_section != now_seg) + as_bad (_(".ltorg in section %s paired to .using in section %s"), + now_seg->name, i370_other_section->name); + } + + if (! longlong_poolP + && ! word_poolP + && ! short_poolP + && ! byte_poolP) + /* Nothing to do. */ + return; + + /* Find largest literal .. 2 4 or 8. */ + lit_count = 0; + while (lit_count < next_literal_pool_place) + { + if (biggest_literal_size < literals[lit_count].size) + biggest_literal_size = literals[lit_count].size; + lit_count ++; + } + if (1 == biggest_literal_size) biggest_align = 0; + else if (2 == biggest_literal_size) biggest_align = 1; + else if (4 == biggest_literal_size) biggest_align = 2; + else if (8 == biggest_literal_size) biggest_align = 3; + else as_bad (_("bad alignment of %d bytes in literal pool"), biggest_literal_size); + if (0 == biggest_align) biggest_align = 1; + + /* Align pool for short, word, double word accesses. */ + frag_align (biggest_align, 0, 0); + record_alignment (now_seg, biggest_align); + + /* Note that the gas listing will print only the first five + entries in the pool .... wonder how to make it print more. */ + /* Output largest literals first, then the smaller ones. */ + for (litsize=8; litsize; litsize /=2) + { + symbolS *current_poolP = NULL; + switch (litsize) + { + case 8: + current_poolP = longlong_poolP; break; + case 4: + current_poolP = word_poolP; break; + case 2: + current_poolP = short_poolP; break; + case 1: + current_poolP = byte_poolP; break; + default: + as_bad (_("bad literal size\n")); + } + if (NULL == current_poolP) + continue; + sprintf (pool_name, ".LITP%01d%06d", litsize, lit_pool_num); + symbol_locate (current_poolP, pool_name, now_seg, + (valueT) frag_now_fix (), frag_now); + symbol_table_insert (current_poolP); + + lit_count = 0; + while (lit_count < next_literal_pool_place) + { + if (litsize == literals[lit_count].size) + { +#define EMIT_ADDR_CONS_SYMBOLS +#ifdef EMIT_ADDR_CONS_SYMBOLS + /* Create a bogus symbol, add it to the pool ... + For the most part, I think this is a useless exercise, + except that having these symbol names in the objects + is vaguely useful for debugging. */ + if (literals[lit_count].sym_name) + { + symbolS * symP = symbol_make_empty (); + symbol_locate (symP, literals[lit_count].sym_name, now_seg, + (valueT) frag_now_fix (), frag_now); + symbol_table_insert (symP); + } +#endif /* EMIT_ADDR_CONS_SYMBOLS */ + + emit_expr (&(literals[lit_count].exp), literals[lit_count].size); + } + lit_count ++; + } + } + + next_literal_pool_place = 0; + longlong_poolP = NULL; + word_poolP = NULL; + short_poolP = NULL; + byte_poolP = NULL; + lit_pool_num++; +} + +#endif /* LITERAL_POOL_SUPPORT */ + + +/* Add support for the HLASM-like USING directive to indicate + the base register to use ... we don't support the full + hlasm semantics for this ... we merely pluck a base address + and a register number out. We print a warning if using is + called multiple times. I suppose we should check to see + if the regno is valid. */ + +static void +i370_using (int ignore ATTRIBUTE_UNUSED) +{ + expressionS ex, baseaddr; + int iregno; + char *star; + + /* If "*" appears in a using, it means "." + replace it with "." so that expr doesn't get confused. */ + star = strchr (input_line_pointer, '*'); + if (star) + *star = '.'; + + /* The first arg to using will usually be ".", but it can + be a more complex expression too. */ + expression (&baseaddr); + if (star) + *star = '*'; + if (O_constant != baseaddr.X_op + && O_symbol != baseaddr.X_op + && O_uminus != baseaddr.X_op) + as_bad (_(".using: base address expression illegal or too complex")); + + if (*input_line_pointer != '\0') ++input_line_pointer; + + /* The second arg to using had better be a register. */ + register_name (&ex); + demand_empty_rest_of_line (); + iregno = ex.X_add_number; + + if (0 == strncmp (now_seg->name, ".text", 5)) + { + i370_using_text_baseaddr = baseaddr; + i370_using_text_regno = iregno; + } + else + { + i370_using_other_baseaddr = baseaddr; + i370_using_other_regno = iregno; + i370_other_section = now_seg; + } +} + +static void +i370_drop (int ignore ATTRIBUTE_UNUSED) +{ + expressionS ex; + int iregno; + + register_name (&ex); + demand_empty_rest_of_line (); + iregno = ex.X_add_number; + + if (0 == strncmp (now_seg->name, ".text", 5)) + { + if (iregno != i370_using_text_regno) + as_bad (_("droping register %d in section %s does not match using register %d"), + iregno, now_seg->name, i370_using_text_regno); + + i370_using_text_regno = -1; + i370_using_text_baseaddr.X_op = O_absent; + } + else + { + if (iregno != i370_using_other_regno) + as_bad (_("droping register %d in section %s does not match using register %d"), + iregno, now_seg->name, i370_using_other_regno); + + if (i370_other_section != now_seg) + as_bad (_("droping register %d in section %s previously used in section %s"), + iregno, now_seg->name, i370_other_section->name); + + i370_using_other_regno = -1; + i370_using_other_baseaddr.X_op = O_absent; + i370_other_section = undefined_section; + } +} + + +/* 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 i370_fixup +{ + expressionS exp; + int opindex; + bfd_reloc_code_real_type reloc; +}; + +#define MAX_INSN_FIXUPS 5 + +/* Handle a macro. Gather all the operands, transform them as + described by the macro, and call md_assemble recursively. All the + operands are separated by commas; we don't accept parentheses + around operands here. */ + +static void +i370_macro (char *str, const struct i370_macro *macro) +{ + char *operands[10]; + unsigned int count; + char *s; + unsigned int len; + const char *format; + int arg; + char *send; + char *complete; + + /* Gather the users operands into the operands array. */ + count = 0; + s = str; + while (1) + { + if (count >= sizeof operands / sizeof operands[0]) + break; + operands[count++] = s; + s = strchr (s, ','); + if (s == (char *) NULL) + break; + *s++ = '\0'; + } + + if (count != macro->operands) + { + as_bad (_("wrong number of operands")); + return; + } + + /* Work out how large the string must be (the size is unbounded + because it includes user input). */ + len = 0; + format = macro->format; + while (*format != '\0') + { + if (*format != '%') + { + ++len; + ++format; + } + else + { + arg = strtol (format + 1, &send, 10); + know (send != format && arg >= 0 && (unsigned) arg < count); + len += strlen (operands[arg]); + format = send; + } + } + + /* Put the string together. */ + complete = s = alloca (len + 1); + format = macro->format; + while (*format != '\0') + { + if (*format != '%') + *s++ = *format++; + else + { + arg = strtol (format + 1, &send, 10); + strcpy (s, operands[arg]); + s += strlen (s); + format = send; + } + } + *s = '\0'; + + /* Assemble the constructed instruction. */ + md_assemble (complete); +} + +/* This routine is called for each instruction to be assembled. */ + +void +md_assemble (char *str) +{ + char *s, *opcode_str; + const struct i370_opcode *opcode; + i370_insn_t insn; + const unsigned char *opindex_ptr; + int have_optional_index, have_optional_basereg, have_optional_reg; + int skip_optional_index, skip_optional_basereg, skip_optional_reg; + int use_text=0, use_other=0; + int off_by_one; + struct i370_fixup fixups[MAX_INSN_FIXUPS]; + int fc; + char *f; + int i; +#ifdef OBJ_ELF + bfd_reloc_code_real_type reloc; +#endif + + /* Get the opcode. */ + for (s = str; *s != '\0' && ! ISSPACE (*s); s++) + ; + if (*s != '\0') + *s++ = '\0'; + opcode_str = str; + + /* Look up the opcode in the hash table. */ + opcode = (const struct i370_opcode *) hash_find (i370_hash, str); + if (opcode == (const struct i370_opcode *) NULL) + { + const struct i370_macro *macro; + + gas_assert (i370_macro_hash); + macro = (const struct i370_macro *) hash_find (i370_macro_hash, str); + if (macro == (const struct i370_macro *) NULL) + as_bad (_("Unrecognized opcode: `%s'"), str); + else + i370_macro (s, macro); + + return; + } + + insn = opcode->opcode; + + str = s; + while (ISSPACE (*str)) + ++str; + + /* I370 operands are either expressions or address constants. + Many operand types are optional. The optional operands + are always surrounded by parens, and are used to denote the base + register ... e.g. "A R1, D2" or "A R1, D2(,B2) as opposed to + the fully-formed "A R1, D2(X2,B2)". Note also the = sign, + such as A R1,=A(i) where the address-of operator =A implies + use of both a base register, and a missing index register. + + So, before we start seriously parsing the operands, we check + to see if we have an optional operand, and, if we do, we count + the number of commas to see which operand should be omitted. */ + + have_optional_index = have_optional_basereg = have_optional_reg = 0; + for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) + { + const struct i370_operand *operand; + + operand = &i370_operands[*opindex_ptr]; + if ((operand->flags & I370_OPERAND_INDEX) != 0) + have_optional_index = 1; + if ((operand->flags & I370_OPERAND_BASE) != 0) + have_optional_basereg = 1; + if ((operand->flags & I370_OPERAND_OPTIONAL) != 0) + have_optional_reg = 1; + } + + skip_optional_index = skip_optional_basereg = skip_optional_reg = 0; + if (have_optional_index || have_optional_basereg) + { + unsigned int opcount, nwanted; + + /* There is an optional operand. Count the number of + commas and open-parens in the input line. */ + if (*str == '\0') + opcount = 0; + else + { + opcount = 1; + s = str; + while ((s = strpbrk (s, ",(=")) != (char *) NULL) + { + ++opcount; + ++s; + if (',' == *s) ++s; /* avoid counting things like (, */ + if ('=' == *s) { ++s; --opcount; } + } + } + + /* If there are fewer operands in the line then are called + for by the instruction, we want to skip the optional + operand. */ + nwanted = strlen ((char *) opcode->operands); + if (have_optional_index) + { + if (opcount < nwanted) + skip_optional_index = 1; + if (have_optional_basereg && ((opcount+1) < nwanted)) + skip_optional_basereg = 1; + if (have_optional_reg && ((opcount+1) < nwanted)) + skip_optional_reg = 1; + } + else + { + if (have_optional_basereg && (opcount < nwanted)) + skip_optional_basereg = 1; + if (have_optional_reg && (opcount < nwanted)) + skip_optional_reg = 1; + } + } + + /* Perform some off-by-one hacks on the length field of certain instructions. + Its such a shame to have to do this, but the problem is that HLASM got + defined so that the lengths differ by one from the actual machine instructions. + this code should probably be moved to a special inster-operand routine. + Sigh. Affected instructions are Compare Logical, Move and Exclusive OR + hack alert -- aren't *all* SS instructions affected ?? */ + off_by_one = 0; + if (0 == strcasecmp ("CLC", opcode->name) + || 0 == strcasecmp ("ED", opcode->name) + || 0 == strcasecmp ("EDMK", opcode->name) + || 0 == strcasecmp ("MVC", opcode->name) + || 0 == strcasecmp ("MVCIN", opcode->name) + || 0 == strcasecmp ("MVN", opcode->name) + || 0 == strcasecmp ("MVZ", opcode->name) + || 0 == strcasecmp ("NC", opcode->name) + || 0 == strcasecmp ("OC", opcode->name) + || 0 == strcasecmp ("XC", opcode->name)) + off_by_one = 1; + + /* Gather the operands. */ + fc = 0; + for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) + { + const struct i370_operand *operand; + const char *errmsg; + char *hold; + expressionS ex; + + operand = &i370_operands[*opindex_ptr]; + errmsg = NULL; + + /* If this is an index operand, and we are skipping it, + just insert a zero. */ + if (skip_optional_index && + ((operand->flags & I370_OPERAND_INDEX) != 0)) + { + insn = i370_insert_operand (insn, operand, 0); + continue; + } + + /* If this is the base operand, and we are skipping it, + just insert the current using basreg. */ + if (skip_optional_basereg && + ((operand->flags & I370_OPERAND_BASE) != 0)) + { + int basereg = -1; + if (use_text) + { + if (0 == strncmp (now_seg->name, ".text", 5) + || 0 > i370_using_other_regno) + basereg = i370_using_text_regno; + else + basereg = i370_using_other_regno; + } + else if (use_other) + { + if (0 > i370_using_other_regno) + basereg = i370_using_text_regno; + else + basereg = i370_using_other_regno; + } + if (0 > basereg) + as_bad (_("not using any base register")); + + insn = i370_insert_operand (insn, operand, basereg); + continue; + } + + /* If this is an optional operand, and we are skipping it, + Use zero (since a non-zero value would denote a register) */ + if (skip_optional_reg + && ((operand->flags & I370_OPERAND_OPTIONAL) != 0)) + { + insn = i370_insert_operand (insn, operand, 0); + continue; + } + + /* Gather the operand. */ + hold = input_line_pointer; + input_line_pointer = str; + + /* Register names are only allowed where there are registers. */ + if ((operand->flags & I370_OPERAND_GPR) != 0) + { + /* Quickie hack to get past things like (,r13). */ + if (skip_optional_index && (',' == *input_line_pointer)) + { + *input_line_pointer = ' '; + input_line_pointer ++; + } + + if (! register_name (&ex)) + as_bad (_("expecting a register for operand %d"), + (int) (opindex_ptr - opcode->operands + 1)); + } + + /* Check for an address constant expression. */ + /* We will put PSW-relative addresses in the text section, + and address literals in the .data (or other) section. */ + else if (i370_addr_cons (&ex)) + use_other = 1; + else if (i370_addr_offset (&ex)) + use_text = 1; + else expression (&ex); + + str = input_line_pointer; + input_line_pointer = hold; + + /* Perform some off-by-one hacks on the length field of certain instructions. + Its such a shame to have to do this, but the problem is that HLASM got + defined so that the programmer specifies a length that is one greater + than what the machine instruction wants. Sigh. */ + if (off_by_one && (0 == strcasecmp ("SS L", operand->name))) + ex.X_add_number --; + + 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) + insn = i370_insert_operand (insn, operand, ex.X_add_number); + else if (ex.X_op == O_constant) + { +#ifdef OBJ_ELF + /* Allow @HA, @L, @H on constants. + Well actually, no we don't; there really don't make sense + (at least not to me) for the i370. However, this code is + left here for any dubious future expansion reasons. */ + char *orig_str = str; + + if ((reloc = i370_elf_suffix (&str, &ex)) != BFD_RELOC_UNUSED) + switch (reloc) + { + default: + str = orig_str; + break; + + case BFD_RELOC_LO16: + /* X_unsigned is the default, so if the user has done + something which cleared it, we always produce a + signed value. */ + ex.X_add_number = (((ex.X_add_number & 0xffff) + ^ 0x8000) + - 0x8000); + break; + + case BFD_RELOC_HI16: + ex.X_add_number = (ex.X_add_number >> 16) & 0xffff; + break; + + case BFD_RELOC_HI16_S: + ex.X_add_number = (((ex.X_add_number >> 16) & 0xffff) + + ((ex.X_add_number >> 15) & 1)); + break; + } +#endif + insn = i370_insert_operand (insn, operand, ex.X_add_number); + } +#ifdef OBJ_ELF + else if ((reloc = i370_elf_suffix (&str, &ex)) != BFD_RELOC_UNUSED) + { + as_tsktsk ("md_assemble(): suffixed relocations not supported\n"); + + /* We need to generate a fixup for this expression. */ + if (fc >= MAX_INSN_FIXUPS) + as_fatal ("too many fixups"); + fixups[fc].exp = ex; + fixups[fc].opindex = 0; + fixups[fc].reloc = reloc; + ++fc; + } +#endif /* OBJ_ELF */ + else + { + /* We need to generate a fixup for this expression. */ + /* Typically, the expression will just be a symbol ... + printf ("insn %s needs fixup for %s \n", + opcode->name, ex.X_add_symbol->bsym->name); */ + + 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; + } + + /* Skip over delimiter (close paren, or comma). */ + if ((')' == *str) && (',' == *(str+1))) + ++str; + if (*str != '\0') + ++str; + } + + while (ISSPACE (*str)) + ++str; + + if (*str != '\0') + as_bad (_("junk at end of line: `%s'"), str); + + /* Write out the instruction. */ + f = frag_more (opcode->len); + if (4 >= opcode->len) + md_number_to_chars (f, insn.i[0], opcode->len); + else + { + md_number_to_chars (f, insn.i[0], 4); + + if (6 == opcode->len) + md_number_to_chars ((f + 4), ((insn.i[1])>>16), 2); + else + { + /* Not used --- don't have any 8 byte instructions. */ + as_bad (_("Internal Error: bad instruction length")); + md_number_to_chars ((f + 4), insn.i[1], opcode->len -4); + } + } + + /* 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_fix. */ + for (i = 0; i < fc; i++) + { + const struct i370_operand *operand; + + operand = &i370_operands[fixups[i].opindex]; + if (fixups[i].reloc != BFD_RELOC_UNUSED) + { + reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); + int size; + fixS *fixP; + + if (!reloc_howto) + abort (); + + size = bfd_get_reloc_size (reloc_howto); + + if (size < 1 || size > 4) + abort (); + + printf (" gwana doo fixup %d \n", i); + fixP = fix_new_exp (frag_now, f - frag_now->fr_literal, size, + &fixups[i].exp, reloc_howto->pc_relative, + fixups[i].reloc); + + /* Turn off complaints that the addend is too large for things like + foo+100000@ha. */ + switch (fixups[i].reloc) + { + case BFD_RELOC_16_GOTOFF: + case BFD_RELOC_LO16: + case BFD_RELOC_HI16: + case BFD_RELOC_HI16_S: + fixP->fx_no_overflow = 1; + break; + default: + break; + } + } + else + { + fix_new_exp (frag_now, f - frag_now->fr_literal, opcode->len, + &fixups[i].exp, + (operand->flags & I370_OPERAND_RELATIVE) != 0, + ((bfd_reloc_code_real_type) + (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); + } + } +} + + +/* Pseudo-op handling. */ + +/* The .byte pseudo-op. This is similar to the normal .byte + pseudo-op, but it can also take a single ASCII string. */ + +static void +i370_byte (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 .tc pseudo-op. This is used when generating XCOFF and ELF. + This takes two or more arguments. + + When generating XCOFF output, the first argument is the name to + give to this location in the toc; this will be a symbol with class + TC. The rest of the arguments are 4 byte values to actually put at + this location in the TOC; often there is just one more argument, a + relocatable symbol reference. + + When not generating XCOFF output, the arguments are the same, but + the first argument is simply ignored. */ + +static void +i370_tc (int ignore ATTRIBUTE_UNUSED) +{ + + /* Skip the TOC symbol name. */ + while (is_part_of_name (*input_line_pointer) + || *input_line_pointer == '[' + || *input_line_pointer == ']' + || *input_line_pointer == '{' + || *input_line_pointer == '}') + ++input_line_pointer; + + /* Align to a four byte boundary. */ + frag_align (2, 0, 0); + record_alignment (now_seg, 2); + + if (*input_line_pointer != ',') + demand_empty_rest_of_line (); + else + { + ++input_line_pointer; + cons (4); + } +} + +char * +md_atof (int type, char *litp, int *sizep) +{ + /* 360/370/390 have two float formats: an old, funky 360 single-precision + format, and the ieee format. Support only the ieee format. */ + return ieee_md_atof (type, litp, sizep, TRUE); +} + +/* Write a value out to the object file, using the appropriate + endianness. */ + +void +md_number_to_chars (char *buf, valueT val, int n) +{ + number_to_chars_bigendian (buf, val, n); +} + +/* Align a section (I don't know why this is machine dependent). */ + +valueT +md_section_align (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 (fragS *fragp ATTRIBUTE_UNUSED, + asection *seg ATTRIBUTE_UNUSED) +{ + abort (); + return 0; +} + +/* Convert a machine dependent frag. We never generate these. */ + +void +md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, + asection *sec ATTRIBUTE_UNUSED, + fragS *fragp ATTRIBUTE_UNUSED) +{ + abort (); +} + +/* We have no need to default values of symbols. */ + +symbolS * +md_undefined_symbol (char *name ATTRIBUTE_UNUSED) +{ + 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 (fixS *fixp, segT sec ATTRIBUTE_UNUSED) +{ + return fixp->fx_frag->fr_address + fixp->fx_where; +} + +/* 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. + + See gas/cgen.c for more sample code and explanations of what's + going on here. */ + +void +md_apply_fix (fixS *fixP, valueT * valP, segT seg) +{ + valueT value = * valP; + + if (fixP->fx_addsy != NULL) + { +#ifdef DEBUG + printf ("\nmd_apply_fix: symbol %s at 0x%x (%s:%d) val=0x%x addend=0x%x\n", + S_GET_NAME (fixP->fx_addsy), + fixP->fx_frag->fr_address + fixP->fx_where, + fixP->fx_file, fixP->fx_line, + S_GET_VALUE (fixP->fx_addsy), value); +#endif + } + else + fixP->fx_done = 1; + + /* Apply fixups to operands. Note that there should be no relocations + for any operands, since no instruction ever takes an operand + that requires reloc. */ + if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) + { + int opindex; + const struct i370_operand *operand; + char *where; + i370_insn_t insn; + + opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; + + operand = &i370_operands[opindex]; + +#ifdef DEBUG + printf ("\nmd_apply_fix: fixup operand %s at 0x%x in %s:%d addend=0x%x\n", + operand->name, + fixP->fx_frag->fr_address + fixP->fx_where, + fixP->fx_file, fixP->fx_line, + value); +#endif + /* Fetch the instruction, insert the fully resolved operand + value, and stuff the instruction back again. + fisxp->fx_size is the length of the instruction. */ + where = fixP->fx_frag->fr_literal + fixP->fx_where; + insn.i[0] = bfd_getb32 ((unsigned char *) where); + + if (6 <= fixP->fx_size) + /* Deal with 48-bit insn's. */ + insn.i[1] = bfd_getb32 (((unsigned char *) where)+4); + + insn = i370_insert_operand (insn, operand, (offsetT) value); + bfd_putb32 ((bfd_vma) insn.i[0], (unsigned char *) where); + + if (6 <= fixP->fx_size) + /* Deal with 48-bit insn's. */ + bfd_putb32 ((bfd_vma) insn.i[1], (((unsigned char *) where)+4)); + + /* We are done, right? right !! */ + fixP->fx_done = 1; + if (fixP->fx_done) + /* Nothing else to do here. */ + return; + + /* Determine a BFD reloc value based on the operand information. + We are only prepared to turn a few of the operands into + relocs. In fact, we support *zero* operand relocations ... + Why? Because we are not expecting the compiler to generate + any operands that need relocation. Due to the 12-bit naturew of + i370 addressing, this would be unusual. */ + { + 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; + } + } + else + { + /* We branch to here if the fixup is not to a symbol that + appears in an instruction operand, but is rather some + declared storage. */ +#ifdef OBJ_ELF + i370_elf_validate_fix (fixP, seg); +#endif +#ifdef DEBUG + printf ("md_apply_fix: reloc case %d in segment %s %s:%d\n", + fixP->fx_r_type, segment_name (seg), fixP->fx_file, fixP->fx_line); + printf ("\tcurrent fixup value is 0x%x \n", value); +#endif + switch (fixP->fx_r_type) + { + case BFD_RELOC_32: + case BFD_RELOC_CTOR: + if (fixP->fx_pcrel) + fixP->fx_r_type = BFD_RELOC_32_PCREL; + /* Fall through. */ + + case BFD_RELOC_RVA: + case BFD_RELOC_32_PCREL: + case BFD_RELOC_32_BASEREL: +#ifdef DEBUG + printf ("\t32 bit relocation at 0x%x\n", + fixP->fx_frag->fr_address + fixP->fx_where); +#endif + md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, + value, 4); + break; + + case BFD_RELOC_LO16: + case BFD_RELOC_16: + 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) + : "")); + + md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, + value, 2); + break; + + /* This case happens when you write, for example, + lis %r3,(L1-L2)@ha + where L1 and L2 are defined later. */ + case BFD_RELOC_HI16: + if (fixP->fx_pcrel) + abort (); + md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, + value >> 16, 2); + break; + case BFD_RELOC_HI16_S: + if (fixP->fx_pcrel) + abort (); + md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, + (value + 0x8000) >> 16, 2); + break; + + case BFD_RELOC_8: + if (fixP->fx_pcrel) + abort (); + + md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, + value, 1); + break; + + default: + fprintf (stderr, + "Gas failure, reloc value %d\n", fixP->fx_r_type); + fflush (stderr); + abort (); + } + } + + fixP->fx_addnumber = value; +} + +/* Generate a reloc for a fixup. */ + +arelent * +tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp) +{ + arelent *reloc; + + reloc = xmalloc (sizeof (arelent)); + + reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); + *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); + reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; + reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); + if (reloc->howto == (reloc_howto_type *) NULL) + { + as_bad_where (fixp->fx_file, fixp->fx_line, + "reloc %d not supported by object file format", (int)fixp->fx_r_type); + return NULL; + } + reloc->addend = fixp->fx_addnumber; + +#ifdef DEBUG + printf ("\ngen_reloc(): sym %s (%s:%d) at addr 0x%x addend=0x%x\n", + fixp->fx_addsy->bsym->name, + fixp->fx_file, fixp->fx_line, + reloc->address, reloc->addend); +#endif + + return reloc; +} + +/* The target specific pseudo-ops which we support. */ + +const pseudo_typeS md_pseudo_table[] = +{ + /* Pseudo-ops which must be overridden. */ + { "byte", i370_byte, 0 }, + + { "dc", i370_dc, 0 }, + { "ds", i370_ds, 0 }, + { "rmode", i370_rmode, 0 }, + { "csect", i370_csect, 0 }, + { "dsect", i370_dsect, 0 }, + + /* enable ebcdic strings e.g. for 3270 support */ + { "ebcdic", i370_ebcdic, 0 }, + +#ifdef OBJ_ELF + { "long", i370_elf_cons, 4 }, + { "word", i370_elf_cons, 4 }, + { "short", i370_elf_cons, 2 }, + { "rdata", i370_elf_rdata, 0 }, + { "rodata", i370_elf_rdata, 0 }, + { "lcomm", i370_elf_lcomm, 0 }, +#endif + + /* This pseudo-op is used even when not generating XCOFF output. */ + { "tc", i370_tc, 0 }, + + /* dump the literal pool */ + { "ltorg", i370_ltorg, 0 }, + + /* support the hlasm-style USING directive */ + { "using", i370_using, 0 }, + { "drop", i370_drop, 0 }, + + { NULL, NULL, 0 } +}; |