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+/* 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,
+};