diff options
Diffstat (limited to 'binutils-2.25/gas/config/obj-ecoff.c')
| -rw-r--r-- | binutils-2.25/gas/config/obj-ecoff.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/binutils-2.25/gas/config/obj-ecoff.c b/binutils-2.25/gas/config/obj-ecoff.c new file mode 100644 index 00000000..a3e5308d --- /dev/null +++ b/binutils-2.25/gas/config/obj-ecoff.c @@ -0,0 +1,320 @@ +/* ECOFF object file format. + Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, + 2005, 2007, 2009, 2010 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 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. */ + +#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. */ + +/* Set section VMAs and GP values before reloc processing. */ + +void +ecoff_frob_file_before_fix (void) +{ + bfd_vma addr; + asection *sec; + + /* 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 ((int) (sizeof (names) / sizeof (names[0]))) + + /* Sections that match names, order to be straightened out later. */ + asection *secs[n_names]; + int i; + + addr = 0; + for (i = 0; i < n_names; i++) + secs[i] = NULL; + + for (sec = stdoutput->sections; sec != NULL; sec = sec->next) + { + for (i = 0; i < n_names; i++) + if (!strcmp (sec->name, names[i])) + { + secs[i] = sec; + bfd_section_list_remove (stdoutput, sec); + break; + } + if (i == n_names) + { + bfd_set_section_vma (stdoutput, sec, addr); + addr += bfd_section_size (stdoutput, sec); + } + } + for (i = 0; i < n_names; i++) + if (secs[i]) + { + bfd_set_section_vma (stdoutput, secs[i], addr); + addr += bfd_section_size (stdoutput, secs[i]); + } + for (i = n_names - 1; i >= 0; i--) + if (secs[i]) + bfd_section_list_prepend (stdoutput, secs[i]); + + /* 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")); + } +} + +/* Swap out the symbols and debugging information for BFD. */ + +void +ecoff_frob_file (void) +{ + const struct ecoff_debug_swap * const debug_swap + = &ecoff_backend (stdoutput)->debug_swap; + bfd_vma addr ATTRIBUTE_UNUSED; + HDRR *hdr; + char *buf; + char *set; + + /* Build the ECOFF debugging information. */ + gas_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 = 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, void *, debug_swap->external_dnr_size); + SET (external_pdr, ipdMax, void *, debug_swap->external_pdr_size); + SET (external_sym, isymMax, void *, debug_swap->external_sym_size); + SET (external_opt, ioptMax, void *, 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, void *, debug_swap->external_rfd_size); + SET (external_fdr, ifdMax, void *, debug_swap->external_fdr_size); + SET (external_ext, iextMax, void *, debug_swap->external_ext_size); +#undef SET +} + +/* 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 (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 (symbol_get_bfdsym (sym)) + == bfd_target_ecoff_flavour); + esym = ecoffsymbol (symbol_get_bfdsym (sym)); + 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 (asection *sec ATTRIBUTE_UNUSED) +{ + return 1; +} + +static void +obj_ecoff_frob_symbol (symbolS *sym, int *puntp ATTRIBUTE_UNUSED) +{ + ecoff_frob_symbol (sym); +} + +static void +ecoff_pop_insert (void) +{ + pop_insert (obj_pseudo_table); +} + +static int +ecoff_separate_stab_sections (void) +{ + return 0; +} + +/* 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, s_ignore, 0 } +}; + +const struct format_ops ecoff_format_ops = +{ + bfd_target_ecoff_flavour, + 0, /* dfl_leading_underscore. */ + + /* FIXME: A comment why emit_section_symbols is different here (1) from + the single-format definition (0) would be in order. */ + 1, /* emit_section_symbols. */ + 0, /* begin. */ + ecoff_new_file, + obj_ecoff_frob_symbol, + ecoff_frob_file, + 0, /* frob_file_before_adjust. */ + ecoff_frob_file_before_fix, + 0, /* frob_file_after_relocs. */ + 0, /* s_get_size. */ + 0, /* s_set_size. */ + 0, /* s_get_align. */ + 0, /* s_set_align. */ + 0, /* s_get_other. */ + 0, /* s_set_other. */ + 0, /* s_get_desc. */ + 0, /* s_set_desc. */ + 0, /* s_get_type. */ + 0, /* s_set_type. */ + 0, /* copy_symbol_attributes. */ + ecoff_generate_asm_lineno, + ecoff_stab, + ecoff_separate_stab_sections, + 0, /* init_stab_section. */ + ecoff_sec_sym_ok_for_reloc, + ecoff_pop_insert, + ecoff_set_ext, + ecoff_read_begin_hook, + ecoff_symbol_new_hook, + ecoff_symbol_clone_hook, + 0 /* adjust_symtab. */ +}; |