/* 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,
- 2005 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007 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 2, or (at your option)
+ 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,
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. */
+ 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 ...
- */
+ 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 <stdio.h>
#include "as.h"
#include "safe-ctype.h"
#include "subsegs.h"
#include "elf/i370.h"
#endif
-/* This is the assembler for the System/390 Architecture */
+/* This is the assembler for the System/390 Architecture. */
/* Tell the main code what the endianness is. */
extern int target_big_endian;
const char FLT_CHARS[] = "dD";
void
-md_show_usage (stream)
- FILE *stream;
+md_show_usage (FILE *stream)
{
fprintf (stream, "\
S/370 options: (these have not yet been tested and may not work) \n\
#endif
}
-\f
-static void i370_byte PARAMS ((int));
-static void i370_tc PARAMS ((int));
-static void i370_ebcdic PARAMS ((int));
-
-static void i370_dc PARAMS ((int));
-static void i370_ds PARAMS ((int));
-static void i370_rmode PARAMS ((int));
-static void i370_csect PARAMS ((int));
-static void i370_dsect PARAMS ((int));
-static void i370_ltorg PARAMS ((int));
-static void i370_using PARAMS ((int));
-static void i370_drop PARAMS ((int));
-static void i370_make_relative PARAMS ((expressionS *exp, expressionS *baseaddr));
-
-#ifdef OBJ_ELF
-static bfd_reloc_code_real_type i370_elf_suffix PARAMS ((char **, expressionS *));
-static void i370_elf_cons PARAMS ((int));
-static void i370_elf_rdata PARAMS ((int));
-static void i370_elf_lcomm PARAMS ((int));
-static void i370_elf_validate_fix PARAMS ((fixS *, segT));
-#endif
-
-\f
-/* 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 }
-};
-
-/* ***************************************************************** */
-
/* Whether to use user friendly register names. */
#define TARGET_REG_NAMES_P TRUE
static bfd_boolean reg_names_p = TARGET_REG_NAMES_P;
-static bfd_boolean register_name PARAMS ((expressionS *));
-static void i370_set_cpu PARAMS ((void));
-static i370_insn_t i370_insert_operand
- PARAMS ((i370_insn_t insn, const struct i370_operand *operand, offsetT val));
-static void i370_macro PARAMS ((char *str, const struct i370_macro *macro));
\f
-/* Predefined register names if -mregnames */
-/* In general, there are lots of them, in an attempt to be compatible */
-/* with a number of assemblers. */
+/* 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
static const struct pd_reg pre_defined_registers[] =
{
- { "arg", 11 }, /* Argument Pointer */
- { "base", 3 }, /* Base Reg */
+ { "arg", 11 }, /* Argument Pointer. */
+ { "base", 3 }, /* Base Reg. */
- { "f.0", 0 }, /* Floating point registers */
+ { "f.0", 0 }, /* Floating point registers. */
{ "f.2", 2 },
{ "f.4", 4 },
{ "f.6", 6 },
{ "f4", 4 },
{ "f6", 6 },
- { "dsa",13 }, /* stack pointer */
- { "lr", 14 }, /* Link Register */
- { "pgt", 4 }, /* Page Origin Table Pointer */
+ { "dsa",13 }, /* Stack pointer. */
+ { "lr", 14 }, /* Link Register. */
+ { "pgt", 4 }, /* Page Origin Table Pointer. */
- { "r.0", 0 }, /* General Purpose Registers */
+ { "r.0", 0 }, /* General Purpose Registers. */
{ "r.1", 1 },
{ "r.10", 10 },
{ "r.11", 11 },
{ "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.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 */
+ { "r.tca", 12 }, /* Pointer to the table of contents. */
+ { "r.toc", 12 }, /* Pointer to the table of contents. */
- { "r0", 0 }, /* More general purpose registers */
+ { "r0", 0 }, /* More general purpose registers. */
{ "r1", 1 },
{ "r10", 10 },
{ "r11", 11 },
{ "r8", 8 },
{ "r9", 9 },
- { "rbase", 3 }, /* Base Reg */
+ { "rbase", 3 }, /* Base Reg. */
- { "rtca", 12 }, /* Pointer to the table of contents */
- { "rtoc", 12 }, /* Pointer to the table of contents */
+ { "rtca", 12 }, /* Pointer to the table of contents. */
+ { "rtoc", 12 }, /* Pointer to the table of contents. */
- { "sp", 13 }, /* Stack Pointer */
+ { "sp", 13 }, /* Stack Pointer. */
};
/* 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
- PARAMS ((const struct pd_reg *, int, const char * name));
-
static int
-reg_name_search (regs, regcount, name)
- const struct pd_reg *regs;
- int regcount;
- const char *name;
+reg_name_search (const struct pd_reg *regs,
+ int regcount,
+ const char *name)
{
int middle, low, high;
int cmp;
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.
- */
+/* 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 (expressionP)
- expressionS *expressionP;
+register_name (expressionS *expressionP)
{
int reg_number;
char *name;
/* 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 ();
- }
+ reg_number = get_single_number ();
else
{
c = get_symbol_end ();
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.
- */
+ 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 */
+/* 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 */
+/* the "other" section, used only for syntax error detection. */
static segT i370_other_section = undefined_section;
/* Opcode hash table. */
static struct hash_control *i370_macro_hash;
#ifdef OBJ_ELF
-/* What type of shared library support to use */
+/* 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 */
+/* Flags to set in the elf header. */
static flagword i370_flags = 0;
#ifndef WORKING_DOT_WORD
size_t md_longopts_size = sizeof (md_longopts);
int
-md_parse_option (c, arg)
- int c;
- char *arg;
+md_parse_option (int c, char *arg)
{
switch (c)
{
case 'm':
- /* -m360 mean to assemble for the ancient 360 architecture */
+ /* -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 */
+ /* -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). */
reg_names_p = FALSE;
#ifdef OBJ_ELF
- /* -mrelocatable/-mrelocatable-lib -- warn about initializations that require relocation */
+ /* -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
{
but can be made more fine grained if desred. */
static void
-i370_set_cpu ()
+i370_set_cpu (void)
{
const char *default_os = TARGET_OS;
const char *default_cpu = TARGET_CPU;
- /* override with the superset for the moment. */
+ /* Override with the superset for the moment. */
i370_cpu = I370_OPCODE_ESA390_SUPERSET;
if (i370_cpu == 0)
{
}
}
-/* Figure out the BFD architecture to use. */
-/* hack alert -- specify the different 370 architectures */
+/* Figure out the BFD architecture to use.
+ FIXME: specify the different 370 architectures. */
enum bfd_architecture
-i370_arch ()
+i370_arch (void)
{
return bfd_arch_i370;
}
opened. */
void
-md_begin ()
+md_begin (void)
{
- register const struct i370_opcode *op;
+ const struct i370_opcode *op;
const struct i370_opcode *op_end;
const struct i370_macro *macro;
const struct i370_macro *macro_end;
{
const char *retval;
- retval = hash_insert (i370_hash, op->name, (PTR) op);
+ retval = hash_insert (i370_hash, op->name, (void *) op);
if (retval != (const char *) NULL)
{
as_bad ("Internal assembler error for instruction %s", op->name);
{
const char *retval;
- retval = hash_insert (i370_macro_hash, macro->name, (PTR) macro);
+ 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);
/* Insert an operand value into an instruction. */
static i370_insn_t
-i370_insert_operand (insn, operand, val)
- i370_insn_t insn;
- const struct i370_operand *operand;
- offsetT val;
+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 */
+ /* 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);
- }
+ /* This is used only for 16, 32 bit insn's. */
+ insn.i[0] |= (((long) val & ((1 << operand->bits) - 1))
+ << operand->shift);
return insn;
}
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 (str_p, exp_p)
- char **str_p;
- expressionS *exp_p;
+i370_elf_suffix (char **str_p, expressionS *exp_p)
{
struct map_bfd
{
int len;
struct map_bfd *ptr;
-#define MAP(str,reloc) { str, sizeof (str)-1, reloc }
+#define MAP(str,reloc) { str, sizeof (str) - 1, reloc }
static struct map_bfd mapping[] =
{
(str2 < ident + sizeof (ident) - 1
&& (ISALNUM (ch) || ch == '@'));
ch = *++str)
- {
- *str2++ = TOLOWER (ch);
- }
+ *str2++ = TOLOWER (ch);
*str2 = '\0';
len = str2 - ident;
return BFD_RELOC_UNUSED;
}
-/* Like normal .long/.short/.word, except support @got, etc. */
-/* clobbers input_line_pointer, checks end-of-line. */
+/* Like normal .long/.short/.word, except support @got, etc.
+ Clobbers input_line_pointer, checks end-of-line. */
+
static void
-i370_elf_cons (nbytes)
- register int nbytes; /* 1=.byte, 2=.word, 4=.long */
+i370_elf_cons (int nbytes) /* 1=.byte, 2=.word, 4=.long. */
{
expressionS exp;
bfd_reloc_code_real_type reloc;
do
{
expression (&exp);
+
if (exp.X_op == O_symbol
&& *input_line_pointer == '@'
&& (reloc = i370_elf_suffix (&input_line_pointer, &exp)) != BFD_RELOC_UNUSED)
if (size > nbytes)
as_bad ("%s relocations do not fit in %d bytes\n", reloc_howto->name, nbytes);
-
else
{
- register char *p = frag_more ((int) nbytes);
+ 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);
0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF
};
-/* ebcdic translation tables needed for 3270 support */
+/* EBCDIC translation tables needed for 3270 support. */
+
static void
-i370_ebcdic (unused)
- int unused ATTRIBUTE_UNUSED;
+i370_ebcdic (int unused ATTRIBUTE_UNUSED)
{
char *p, *end;
char delim = 0;
while ('\n' == *end) end --;
delim = *input_line_pointer;
- if (('\'' == delim) || ('\"' == delim)) {
- input_line_pointer ++;
- end = rindex (input_line_pointer, delim);
- }
+ if (('\'' == delim) || ('\"' == delim))
+ {
+ input_line_pointer ++;
+ end = rindex (input_line_pointer, delim);
+ }
if (end > input_line_pointer)
{
}
\f
-/* stub out a couple of routines */
+/* Stub out a couple of routines. */
+
static void
-i370_rmode (unused)
- int unused ATTRIBUTE_UNUSED;
+i370_rmode (int unused ATTRIBUTE_UNUSED)
{
as_tsktsk ("rmode ignored");
}
static void
-i370_dsect (sect)
- int sect;
+i370_dsect (int sect)
{
char *save_line = input_line_pointer;
static char section[] = ".data\n";
- /* Just pretend this is .section .data */
+ /* Just pretend this is .section .data. */
input_line_pointer = section;
obj_elf_section (sect);
}
static void
-i370_csect (unused)
- int unused ATTRIBUTE_UNUSED;
+i370_csect (int unused ATTRIBUTE_UNUSED)
{
as_tsktsk ("csect not supported");
}
\f
/* 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
- */
+ 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 (unused)
- int unused ATTRIBUTE_UNUSED;
+i370_dc (int unused ATTRIBUTE_UNUSED)
{
char * p, tmp[50];
int nbytes=0;
return;
}
- /* figure out the size */
+ /* Figure out the size. */
type = *input_line_pointer++;
switch (type)
{
return;
}
- /* get rid of pesky quotes */
+ /* Get rid of pesky quotes. */
if ('\'' == *input_line_pointer)
{
char * close;
+
++input_line_pointer;
close = strchr (input_line_pointer, '\'');
if (close)
else
as_bad ("missing end-quote");
}
+
if ('\"' == *input_line_pointer)
{
char * close;
+
++input_line_pointer;
close = strchr (input_line_pointer, '\"');
if (close)
}
\f
-/* provide minimal support for DS Define Storage */
+/* Provide minimal support for DS Define Storage. */
+
static void
-i370_ds (unused)
- int unused ATTRIBUTE_UNUSED;
+i370_ds (int unused ATTRIBUTE_UNUSED)
{
- /* DS 0H or DS 0F or DS 0D */
+ /* DS 0H or DS 0F or DS 0D. */
if ('0' == *input_line_pointer)
{
- int alignment = 0; /* left shift 1<<align */
+ int alignment = 0; /* Left shift 1 << align. */
input_line_pointer ++;
switch (*input_line_pointer++)
{
record_alignment (now_seg, alignment);
}
else
- {
- as_bad ("this DS form not yet supported");
- }
+ as_bad ("this DS form not yet supported");
}
/* Solaris pseudo op to change to the .rodata section. */
+
static void
-i370_elf_rdata (sect)
- int sect;
+i370_elf_rdata (int sect)
{
char *save_line = input_line_pointer;
static char section[] = ".rodata\n";
- /* Just pretend this is .section .rodata */
+ /* 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 */
+/* Pseudo op to make file scope bss items. */
+
static void
-i370_elf_lcomm (unused)
- int unused ATTRIBUTE_UNUSED;
+i370_elf_lcomm (int unused ATTRIBUTE_UNUSED)
{
- register char *name;
- register char c;
- register char *p;
+ char *name;
+ char c;
+ char *p;
offsetT size;
- register symbolS *symbolP;
+ symbolS *symbolP;
offsetT align;
segT old_sec;
int old_subsec;
name = input_line_pointer;
c = get_symbol_end ();
- /* just after name is now '\0' */
+ /* Just after name is now '\0'. */
p = input_line_pointer;
*p = c;
SKIP_WHITESPACE ();
return;
}
- input_line_pointer++; /* skip ',' */
+ /* Skip ','. */
+ input_line_pointer++;
if ((size = get_absolute_expression ()) < 0)
{
as_warn (".COMMon length (%ld.) <0! Ignored.", (long) size);
return;
}
- /* allocate_bss: */
+ /* Allocate_bss: */
old_sec = now_seg;
old_subsec = now_subseg;
if (align)
{
- /* convert to a power of 2 alignment */
+ /* Convert to a power of 2 alignment. */
for (align2 = 0; (align & 1) == 0; align >>= 1, ++align2)
;
if (align != 1)
/* 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 (fixp, seg)
- fixS *fixp;
- segT seg;
+i370_elf_validate_fix (fixS *fixp, segT seg)
{
if (fixp->fx_done || fixp->fx_pcrel)
return;
{
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");
- }
+ as_bad_where (fixp->fx_file, fixp->fx_line,
+ "Relocation cannot be done when using -mrelocatable");
}
return;
+ default:
+ break;
}
}
#endif /* OBJ_ELF */
\f
#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.
- */
+/* 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
} literalT;
literalT literals[MAX_LITERAL_POOL_SIZE];
-int next_literal_pool_place = 0; /* Next free entry in the pool */
+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 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 */
+/* Create a new, empty symbol. */
static symbolS *
symbol_make_empty (void)
{
(valueT) 0, &zero_address_frag);
}
-/* add an expression to the literal pool */
+/* 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 */
+ /* Start a new pool, if necessary. */
if (8 == sz && NULL == longlong_poolP)
longlong_poolP = symbol_make_empty ();
else if (4 == sz && NULL == word_poolP)
else if (1 == sz && NULL == byte_poolP)
byte_poolP = symbol_make_empty ();
- /* Check if this literal value is already in the pool: */
- /* hack alert -- we should probably be checking expressions
- * of type O_symbol as well ... */
- /* hack alert XXX this is probably(certainly?) broken for O_big,
- * which includes 64-bit long-longs ...
- */
+ /* 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
if (lit_count == next_literal_pool_place) /* new entry */
{
if (next_literal_pool_place > MAX_LITERAL_POOL_SIZE)
- {
- as_bad ("Literal Pool Overflow");
- }
+ 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);
- }
+ literals[next_literal_pool_place].sym_name = strdup (name);
else
- {
- literals[next_literal_pool_place].sym_name = NULL;
- }
+ 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.
- */
+ 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_op_symbol = NULL;
/* If the user has set up a base reg in another section,
- * use that; otherwise use the text section. */
+ use that; otherwise use the text section. */
if (0 < i370_using_other_regno)
- {
- i370_make_relative (exx, &i370_using_other_baseaddr);
- }
+ i370_make_relative (exx, &i370_using_other_baseaddr);
else
- {
- i370_make_relative (exx, &i370_using_text_baseaddr);
- }
+ 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
- */
+ 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
- PARAMS ((symbolS *, const char *, segT, valueT, fragS *));
+ a later date assign it a value. Thats what these functions do. */
static void
-symbol_locate (symbolP, name, segment, valu, frag)
- symbolS *symbolP;
- const char *name; /* It is copied, the caller can modify */
- segT segment; /* Segment identifier (SEG_<something>) */
- valueT valu; /* Symbol value */
- fragS *frag; /* Associated fragment */
+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;
symbol_set_frag (symbolP, frag);
- /*
- * Link to end of symbol chain.
- */
+ /* Link to end of symbol chain. */
{
extern int symbol_table_frozen;
+
if (symbol_table_frozen)
abort ();
}
}
/* 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,
- */
+ 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)
{
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 */
+ /* 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;
- }
+ all_digits = 1;
else if (ISALPHA (*lab))
{
if (!all_digits)
++lab;
}
- /* See if operand has a * in it */
+ /* 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. */
+ /* 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... */
+ /* 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);
- }
+ i370_make_relative (exx, &i370_using_text_baseaddr);
else
- {
- i370_make_relative (exx, &i370_using_other_baseaddr);
- }
+ i370_make_relative (exx, &i370_using_other_baseaddr);
- /* put the * back */
+ /* Put the * back. */
if (dot)
*dot = '*';
return TRUE;
}
-/* handle address constants of various sorts */
+/* 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
- */
+ =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;
+ int hex_len = 0;
+ int cons_len = 0;
name = input_line_pointer;
sym_name = input_line_pointer;
- /* Find the spelling of the operand */
+ /* Find the spelling of the operand. */
if (name[0] == '=' && ISALPHA (name[1]))
- {
- name = ++input_line_pointer;
- }
+ name = ++input_line_pointer;
else
- {
- return FALSE;
- }
+ return FALSE;
+
switch (name[0])
{
- case 'A':
- case 'V':
- /* A == address-of */
- /* V == extern */
+ 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
- */
+ /* 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;
case 'H':
case 'F':
case 'X':
- case 'E': /* single-precision float point */
- case 'D': /* double-precision float point */
+ 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 */
+ /* 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; hack alert -- assume single-digit
- * length */
+ /* Extract length, if it is present;
+ FIXME: assume single-digit length. */
if ('L' == name[1])
{
- cons_len = name[2] - '0'; /* should work for ascii and ebcdic */
+ /* Should work for ASCII and EBCDIC. */
+ cons_len = name[2] - '0';
input_line_pointer += 2;
}
++input_line_pointer;
- /* get rid of pesky quotes */
+ /* Get rid of pesky quotes. */
if ('\'' == *input_line_pointer)
{
char * close;
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
- */
+ 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;
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
- */
+ 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;
expression (exp);
input_line_pointer = save + (input_line_pointer-tmp-2);
- /* fix up lengths for floats and doubles */
+ /* Fix up lengths for floats and doubles. */
if (O_big == exp->X_op)
- {
- exp->X_add_number = cons_len / CHARS_PER_LITTLENUM;
- }
+ exp->X_add_number = cons_len / CHARS_PER_LITTLENUM;
}
else
- {
- expression (exp);
- }
- /* O_big occurs when more than 4 bytes worth gets parsed */
+ 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");
\f
/* 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.
- */
+ This aligns the pool to the size of the largest literal in the pool. */
static void
-i370_ltorg (ignore)
- int ignore ATTRIBUTE_UNUSED;
+i370_ltorg (int ignore ATTRIBUTE_UNUSED)
{
int litsize;
int lit_count = 0;
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);
- }
+ 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);
- }
+ 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 */
- /* as_tsktsk ("Nothing to put in the pool\n"); */
- return;
- }
+ /* Nothing to do. */
+ return;
- /* find largest literal .. 2 4 or 8 */
+ /* Find largest literal .. 2 4 or 8. */
lit_count = 0;
while (lit_count < next_literal_pool_place)
{
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 */
+ /* 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. */
+ 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;
{
#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 ...
- */
+ /* 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 ();
#endif /* LITERAL_POOL_SUPPORT */
\f
-/* 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 ...
- */
+/* 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 (ignore)
- int ignore ATTRIBUTE_UNUSED;
+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. */
+ /* 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 ... */
+ /* 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 */
+ /* The second arg to using had better be a register. */
register_name (&ex);
demand_empty_rest_of_line ();
iregno = ex.X_add_number;
}
static void
-i370_drop (ignore)
- int ignore ATTRIBUTE_UNUSED;
+i370_drop (int ignore ATTRIBUTE_UNUSED)
{
expressionS ex;
int iregno;
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);
- }
+ 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);
- }
+ 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);
- }
+ 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;
}
}
-/* 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");
- }
-}
\f
/* 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
bfd_reloc_code_real_type reloc;
};
-#define MAX_INSN_FIXUPS (5)
+#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 (str)
- char *str;
+md_assemble (char *str)
{
char *s, *opcode_str;
const struct i370_opcode *opcode;
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;
}
/* 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 ??
- */
+ 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)
{
if (0 == strncmp (now_seg->name, ".text", 5)
|| 0 > i370_using_other_regno)
- {
- basereg = i370_using_text_regno;
- }
+ basereg = i370_using_text_regno;
else
- {
- basereg = i370_using_other_regno;
- }
+ basereg = i370_using_other_regno;
}
else if (use_other)
{
if (0 > i370_using_other_regno)
- {
- basereg = i370_using_text_regno;
- }
+ basereg = i370_using_text_regno;
else
- {
- basereg = i370_using_other_regno;
- }
+ basereg = i370_using_other_regno;
}
if (0 > basereg)
- {
- as_bad ("not using any base register");
- }
+ as_bad ("not using any base register");
+
insn = i370_insert_operand (insn, operand, basereg);
continue;
}
hold = input_line_pointer;
input_line_pointer = str;
- /* register names are only allowed where there are registers ... */
+ /* Register names are only allowed where there are registers. */
if ((operand->flags & I370_OPERAND_GPR) != 0)
{
- /* quickie hack to get past things like (,r13) */
+ /* 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",
- opindex_ptr - opcode->operands + 1);
- }
+ 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. */
+ and address literals in the .data (or other) section. */
else if (i370_addr_cons (&ex))
- use_other=1;
+ use_other = 1;
else if (i370_addr_offset (&ex))
- use_text=1;
+ 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.
- */
+ /* 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 --;
- }
+ 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);
- }
+ 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 ... */
+ 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)
++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);
- */
+ 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");
++fc;
}
- /* skip over delimiter (close paren, or comma) */
+ /* Skip over delimiter (close paren, or comma). */
if ((')' == *str) && (',' == *(str+1)))
++str;
if (*str != '\0')
/* Write out the instruction. */
f = frag_more (opcode->len);
if (4 >= opcode->len)
- {
- md_number_to_chars (f, insn.i[0], 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);
- }
+ md_number_to_chars ((f + 4), ((insn.i[1])>>16), 2);
else
{
- /* not used --- don't have any 8 byte instructions */
+ /* 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);
+ md_number_to_chars ((f + 4), insn.i[1], opcode->len -4);
}
}
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. */
+ md_apply_fix. */
for (i = 0; i < fc; i++)
{
const struct i370_operand *operand;
}
}
-/* 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 (str, 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 = (char *) 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);
-}
\f
/* Pseudo-op handling. */
pseudo-op, but it can also take a single ASCII string. */
static void
-i370_byte (ignore)
- int ignore ATTRIBUTE_UNUSED;
+i370_byte (int ignore ATTRIBUTE_UNUSED)
{
if (*input_line_pointer != '\"')
{
the first argument is simply ignored. */
static void
-i370_tc (ignore)
- int ignore ATTRIBUTE_UNUSED;
+i370_tc (int ignore ATTRIBUTE_UNUSED)
{
/* Skip the TOC symbol name. */
returned, or NULL on OK. */
char *
-md_atof (type, litp, sizep)
- int type;
- char *litp;
- int *sizep;
+md_atof (int type, char *litp, int *sizep)
{
int prec;
LITTLENUM_TYPE words[4];
endianness. */
void
-md_number_to_chars (buf, val, n)
- char *buf;
- valueT val;
- int n;
+md_number_to_chars (char *buf, valueT val, int n)
{
- number_to_chars_bigendian (buf, val, n);
+ number_to_chars_bigendian (buf, val, n);
}
/* Align a section (I don't know why this is machine dependent). */
valueT
-md_section_align (seg, addr)
- asection *seg;
- valueT addr;
+md_section_align (asection *seg, valueT addr)
{
int align = bfd_get_section_alignment (stdoutput, seg);
/* We don't have any form of relaxing. */
int
-md_estimate_size_before_relax (fragp, seg)
- fragS *fragp ATTRIBUTE_UNUSED;
- asection *seg ATTRIBUTE_UNUSED;
+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 (abfd, sec, fragp)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- fragS *fragp ATTRIBUTE_UNUSED;
+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 (name)
- char *name ATTRIBUTE_UNUSED;
+md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
{
return 0;
}
given a PC relative reloc. */
long
-md_pcrel_from_section (fixp, sec)
- fixS *fixp;
- segT sec ATTRIBUTE_UNUSED;
+md_pcrel_from_section (fixS *fixp, segT sec ATTRIBUTE_UNUSED)
{
return fixp->fx_frag->fr_address + fixp->fx_where;
}
fixup.
See gas/cgen.c for more sample code and explanations of what's
- going on here ...
-*/
+ going on here. */
void
-md_apply_fix3 (fixP, valP, seg)
- fixS *fixP;
- valueT * valP;
- segT seg;
+md_apply_fix (fixS *fixP, valueT * valP, segT seg)
{
valueT value = * valP;
if (fixP->fx_addsy != NULL)
{
#ifdef DEBUG
- printf ("\nmd_apply_fix3: symbol %s at 0x%x (%s:%d) val=0x%x addend=0x%x\n",
+ 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,
operand = &i370_operands[opindex];
#ifdef DEBUG
- printf ("\nmd_apply_fix3: fixup operand %s at 0x%x in %s:%d addend=0x%x\n",
+ 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,
i370_elf_validate_fix (fixP, seg);
#endif
#ifdef DEBUG
- printf ("md_apply_fix3: reloc case %d in segment %s %s:%d\n",
+ 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
/* Generate a reloc for a fixup. */
arelent *
-tc_gen_reloc (seg, fixp)
- asection *seg ATTRIBUTE_UNUSED;
- fixS *fixp;
+tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
{
arelent *reloc;
- reloc = (arelent *) xmalloc (sizeof (arelent));
+ reloc = xmalloc (sizeof (arelent));
- reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
+ 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);
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 }
+};
+
projects / deliverable / binutils-gdb.git / blobdiff