19990502 sourceware importbinu_ss_19990502

1 files changed, 309 insertions, 0 deletions

diff --git a/gas/config/obj-ecoff.c b/gas/config/obj-ecoff.c
new file mode 100644
index 0000000..ec3ce88
--- /dev/null
+++ b/gas/config/obj-ecoff.c
@@ -0,0 +1,309 @@
+/* ECOFF object file format.
+   Copyright (C) 1993, 94, 95, 96, 1997, 1998 Free Software Foundation, Inc.
+   Contributed by Cygnus Support.
+   This file was put together by Ian Lance Taylor <ian@cygnus.com>.
+
+   This file is part of GAS.
+
+   GAS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   GAS is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GAS; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+#define OBJ_HEADER "obj-ecoff.h"
+#include "as.h"
+#include "coff/internal.h"
+#include "bfd/libcoff.h"
+#include "bfd/libecoff.h"
+
+/* Almost all of the ECOFF support is actually in ecoff.c in the main
+   gas directory.  This file mostly just arranges to call that one at
+   the right times.  */
+
+static int ecoff_sec_sym_ok_for_reloc PARAMS ((asection *));
+static void obj_ecoff_frob_symbol PARAMS ((symbolS *, int *));
+static void ecoff_pop_insert PARAMS ((void));
+
+/* These are the pseudo-ops we support in this file.  Only those
+   relating to debugging information are supported here.
+
+   The following pseudo-ops from the Kane and Heinrich MIPS book
+   should be defined here, but are currently unsupported: .aent,
+   .bgnb, .endb, .verstamp, .vreg.
+
+   The following pseudo-ops from the Kane and Heinrich MIPS book are
+   MIPS CPU specific, and should be defined by tc-mips.c: .alias,
+   .extern, .galive, .gjaldef, .gjrlive, .livereg, .noalias, .option,
+   .rdata, .sdata, .set.
+
+   The following pseudo-ops from the Kane and Heinrich MIPS book are
+   not MIPS CPU specific, but are also not ECOFF specific.  I have
+   only listed the ones which are not already in read.c.  It's not
+   completely clear where these should be defined, but tc-mips.c is
+   probably the most reasonable place: .asciiz, .asm0, .endr, .err,
+   .half, .lab, .repeat, .struct, .weakext.  */
+
+const pseudo_typeS obj_pseudo_table[] =
+{
+  /* COFF style debugging information. .ln is not used; .loc is used
+     instead.  */
+  { "def",	ecoff_directive_def,	0 },
+  { "dim",	ecoff_directive_dim,	0 },
+  { "endef",	ecoff_directive_endef,	0 },
+  { "file",	ecoff_directive_file,	0 },
+  { "scl",	ecoff_directive_scl,	0 },
+  { "size",	ecoff_directive_size,	0 },
+  { "esize",	ecoff_directive_size,	0 },
+  { "tag",	ecoff_directive_tag,	0 },
+  { "type",	ecoff_directive_type,	0 },
+  { "etype",	ecoff_directive_type,	0 },
+  { "val",	ecoff_directive_val,	0 },
+
+  /* ECOFF specific debugging information.  */
+  { "begin",	ecoff_directive_begin,	0 },
+  { "bend",	ecoff_directive_bend,	0 },
+  { "end",	ecoff_directive_end,	0 },
+  { "ent",	ecoff_directive_ent,	0 },
+  { "fmask",	ecoff_directive_fmask,	0 },
+  { "frame",	ecoff_directive_frame,	0 },
+  { "loc",	ecoff_directive_loc,	0 },
+  { "mask",	ecoff_directive_mask,	0 },
+
+  /* Other ECOFF directives.  */
+  { "extern",	ecoff_directive_extern,	0 },
+
+#ifndef TC_MIPS
+  /* For TC_MIPS, tc-mips.c adds this. */
+  { "weakext",	ecoff_directive_weakext, 0 },
+#endif
+
+  /* These are used on Irix.  I don't know how to implement them.  */
+  { "bgnb",	s_ignore,		0 },
+  { "endb",	s_ignore,		0 },
+  { "verstamp",	s_ignore,		0 },
+
+  /* Sentinel.  */
+  { NULL }
+};
+
+/* Swap out the symbols and debugging information for BFD.  */
+
+void
+ecoff_frob_file ()
+{
+  const struct ecoff_debug_swap * const debug_swap
+    = &ecoff_backend (stdoutput)->debug_swap;
+  bfd_vma addr;
+  asection *sec;
+  HDRR *hdr;
+  char *buf;
+  char *set;
+
+  /* Set the section VMA values.  We force the .sdata and .sbss
+     sections to the end to ensure that their VMA addresses are close
+     together so that the GP register can address both of them.  We
+     put the .bss section after the .sbss section.
+
+     Also, for the Alpha, we must sort the sections, to make sure they
+     appear in the output file in the correct order.  (Actually, maybe
+     this is a job for BFD.  But the VMAs computed would be out of
+     whack if we computed them given our initial, random ordering.
+     It's possible that that wouldn't break things; I could do some
+     experimenting sometime and find out.
+
+     This output ordering of sections is magic, on the Alpha, at
+     least.  The .lita section must come before .lit8 and .lit4,
+     otherwise the OSF/1 linker may silently trash the .lit{4,8}
+     section contents.  Also, .text must preceed .rdata.  These differ
+     from the order described in some parts of the DEC OSF/1 Assembly
+     Language Programmer's Guide, but that order doesn't seem to work
+     with their linker.
+
+     I don't know if section ordering on the MIPS is important.  */
+
+  static const char *const names[] = {
+    /* text segment */
+    ".text", ".rdata", ".init", ".fini",
+    /* data segment */
+    ".data", ".lita", ".lit8", ".lit4", ".sdata", ".got",
+    /* bss segment */
+    ".sbss", ".bss",
+  };
+#define n_names (sizeof (names) / sizeof (names[0]))
+
+  addr = 0;
+  {
+    /* Sections that match names, order to be straightened out later.  */
+    asection *secs[n_names];
+    /* Linked list of sections with non-matching names.  Random ordering.  */
+    asection *other_sections = 0;
+    /* Pointer to next section, since we're destroying the original
+       ordering.  */
+    asection *next;
+
+    int i;
+
+    for (i = 0; i < n_names; i++)
+      secs[i] = 0;
+    for (sec = stdoutput->sections; sec != (asection *) NULL; sec = next)
+      {
+	next = sec->next;
+	for (i = 0; i < n_names; i++)
+	  if (!strcmp (sec->name, names[i]))
+	    {
+	      secs[i] = sec;
+	      break;
+	    }
+	if (i == n_names)
+	  {
+	    bfd_set_section_vma (stdoutput, sec, addr);
+	    addr += bfd_section_size (stdoutput, sec);
+	    sec->next = other_sections;
+	    other_sections = sec;
+	  }
+      }
+    for (i = 0; i < n_names; i++)
+      if (secs[i])
+	{
+	  sec = secs[i];
+	  bfd_set_section_vma (stdoutput, sec, addr);
+	  addr += bfd_section_size (stdoutput, sec);
+	}
+    for (i = n_names - 1; i >= 0; i--)
+      if (secs[i])
+	{
+	  sec = secs[i];
+	  sec->next = other_sections;
+	  other_sections = sec;
+	}
+    stdoutput->sections = other_sections;
+  }
+
+  /* Build the ECOFF debugging information.  */
+  assert (ecoff_data (stdoutput) != 0);
+  hdr = &ecoff_data (stdoutput)->debug_info.symbolic_header;
+  ecoff_build_debug (hdr, &buf, debug_swap);
+
+  /* Finish up the ecoff_tdata structure.  */
+  set = buf;
+#define SET(ptr, count, type, size) \
+  if (hdr->count == 0) \
+    ecoff_data (stdoutput)->debug_info.ptr = (type) NULL; \
+  else \
+    { \
+      ecoff_data (stdoutput)->debug_info.ptr = (type) set; \
+      set += hdr->count * size; \
+    }
+
+  SET (line, cbLine, unsigned char *, sizeof (unsigned char));
+  SET (external_dnr, idnMax, PTR, debug_swap->external_dnr_size);
+  SET (external_pdr, ipdMax, PTR, debug_swap->external_pdr_size);
+  SET (external_sym, isymMax, PTR, debug_swap->external_sym_size);
+  SET (external_opt, ioptMax, PTR, debug_swap->external_opt_size);
+  SET (external_aux, iauxMax, union aux_ext *, sizeof (union aux_ext));
+  SET (ss, issMax, char *, sizeof (char));
+  SET (ssext, issExtMax, char *, sizeof (char));
+  SET (external_rfd, crfd, PTR, debug_swap->external_rfd_size);
+  SET (external_fdr, ifdMax, PTR, debug_swap->external_fdr_size);
+  SET (external_ext, iextMax, PTR, debug_swap->external_ext_size);
+
+#undef SET
+
+  /* Fill in the register masks.  */
+  {
+    unsigned long gprmask = 0;
+    unsigned long fprmask = 0;
+    unsigned long *cprmask = NULL;
+
+#ifdef TC_MIPS
+    /* Fill in the MIPS register masks.  It's probably not worth
+       setting up a generic interface for this.  */
+    gprmask = mips_gprmask;
+    cprmask = mips_cprmask;
+#endif
+
+#ifdef TC_ALPHA
+    alpha_frob_ecoff_data ();
+
+    if (! bfd_ecoff_set_gp_value (stdoutput, alpha_gp_value))
+      as_fatal (_("Can't set GP value"));
+
+    gprmask = alpha_gprmask;
+    fprmask = alpha_fprmask;
+#endif
+
+    if (! bfd_ecoff_set_regmasks (stdoutput, gprmask, fprmask, cprmask))
+      as_fatal (_("Can't set register masks"));
+  }
+}
+
+/* This is called by the ECOFF code to set the external information
+   for a symbol.  We just pass it on to BFD, which expects the swapped
+   information to be stored in the native field of the symbol.  */
+
+void
+obj_ecoff_set_ext (sym, ext)
+     symbolS *sym;
+     EXTR *ext;
+{
+  const struct ecoff_debug_swap * const debug_swap
+    = &ecoff_backend (stdoutput)->debug_swap;
+  ecoff_symbol_type *esym;
+
+  know (bfd_asymbol_flavour (sym->bsym) == bfd_target_ecoff_flavour);
+  esym = ecoffsymbol (sym->bsym);
+  esym->local = false;
+  esym->native = xmalloc (debug_swap->external_ext_size);
+  (*debug_swap->swap_ext_out) (stdoutput, ext, esym->native);
+}
+
+static int
+ecoff_sec_sym_ok_for_reloc (sec)
+     asection *sec;
+{
+  return 1;
+}
+
+static void
+obj_ecoff_frob_symbol (sym, puntp)
+     symbolS *sym;
+     int *puntp;
+{
+  ecoff_frob_symbol (sym);
+}
+
+static void
+ecoff_pop_insert ()
+{
+  pop_insert (obj_pseudo_table);
+}
+
+const struct format_ops ecoff_format_ops =
+{
+  bfd_target_ecoff_flavour,
+  0,
+  1,
+  obj_ecoff_frob_symbol,
+  ecoff_frob_file,
+  0,
+  0, 0,
+  0, 0,
+  0,
+  ecoff_generate_asm_lineno,
+  ecoff_stab,
+  ecoff_sec_sym_ok_for_reloc,
+  ecoff_pop_insert,
+  ecoff_set_ext,
+  ecoff_read_begin_hook,
+  ecoff_symbol_new_hook,
+};