-/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
+/* BFD back-end data structures for a.out (and similar) files.
+ Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
+ Written by Cygnus Support.
-This file is part of BFD, the Binary File Diddler.
+This file is part of BFD, the Binary File Descriptor library.
-BFD is free software; you can redistribute it and/or modify
+This program 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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-BFD is distributed in the hope that it will be useful,
+This program 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 BFD; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-/* $Id$ */
+/* We try to encapsulate the differences in the various a.out file
+ variants in a few routines, and otherwise share large masses of code.
+ This means we only have to fix bugs in one place, most of the time. */
-/* BFD back-end data structures for a.out (and similar) files.
+/* Parameterize the a.out code based on whether it is being built
+ for a 32-bit architecture or a 64-bit architecture. */
+#if ARCH_SIZE==64
+#define GET_WORD bfd_h_get_64
+#define GET_SWORD bfd_h_get_signed_64
+#define PUT_WORD bfd_h_put_64
+#ifndef NAME
+#define NAME(x,y) CAT3(x,_64_,y)
+#endif
+#define JNAME(x) CAT(x,_64)
+#define BYTES_IN_WORD 8
+#else /* ARCH_SIZE == 32 */
+#define GET_WORD bfd_h_get_32
+#define GET_SWORD bfd_h_get_signed_32
+#define PUT_WORD bfd_h_put_32
+#ifndef NAME
+#define NAME(x,y) CAT3(x,_32_,y)
+#endif
+#define JNAME(x) CAT(x,_32)
+#define BYTES_IN_WORD 4
+#endif /* ARCH_SIZE==32 */
+
+/* Declare at file level, since it isused in parameter lists, which
+ have weird scope. */
+struct external_exec;
+
+/* Back-end information for various a.out targets. */
+struct aout_backend_data
+{
+ /* Are ZMAGIC files mapped contiguously? If so, the text section may
+ need more padding, if the segment size (granularity for memory access
+ control) is larger than the page size. */
+ unsigned char zmagic_mapped_contiguous;
+ /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
+ text section, which starts immediately after the file header.
+ If not, the text section starts on the next page. */
+ unsigned char text_includes_header;
+
+ /* If the text section VMA isn't specified, and we need an absolute
+ address, use this as the default. If we're producing a relocatable
+ file, zero is always used. */
+ /* ?? Perhaps a callback would be a better choice? Will this do anything
+ reasonable for a format that handles multiple CPUs with different
+ load addresses for each? */
+ bfd_vma default_text_vma;
+
+ /* Callback for setting the page and segment sizes, if they can't be
+ trivially determined from the architecture. */
+ boolean (*set_sizes) PARAMS ((bfd *));
+
+ /* zmagic files only. For go32, the length of the exec header contributes
+ to the size of the text section in the file for alignment purposes but
+ does *not* get counted in the length of the text section. */
+ unsigned char exec_header_not_counted;
+};
+#define aout_backend_info(abfd) \
+ ((CONST struct aout_backend_data *)((abfd)->xvec->backend_data))
+
+/* This is the layout in memory of a "struct exec" while we process it.
+ All 'lengths' are given as a number of bytes.
+ All 'alignments' are for relinkable files only; an alignment of
+ 'n' indicates the corresponding segment must begin at an
+ address that is a multiple of (2**n). */
+
+struct internal_exec
+{
+ long a_info; /* Magic number and flags, packed */
+ bfd_vma a_text; /* length of text, in bytes */
+ bfd_vma a_data; /* length of data, in bytes */
+ bfd_vma a_bss; /* length of uninitialized data area in mem */
+ bfd_vma a_syms; /* length of symbol table data in file */
+ bfd_vma a_entry; /* start address */
+ bfd_vma a_trsize; /* length of text's relocation info, in bytes */
+ bfd_vma a_drsize; /* length of data's relocation info, in bytes */
+ /* Added for i960 */
+ bfd_vma a_tload; /* Text runtime load address */
+ bfd_vma a_dload; /* Data runtime load address */
+ unsigned char a_talign; /* Alignment of text segment */
+ unsigned char a_dalign; /* Alignment of data segment */
+ unsigned char a_balign; /* Alignment of bss segment */
+ char a_relaxable; /* Enough info for linker relax */
+};
+
+/* Magic number is written
+< MSB >
+3130292827262524232221201918171615141312111009080706050403020100
+< FLAGS >< MACHINE TYPE >< MAGIC NUMBER >
+*/
+/* Magic number for NetBSD is
+<MSB >
+3130292827262524232221201918171615141312111009080706050403020100
+< FLAGS >< >< MAGIC NUMBER >
+*/
+
+enum machine_type {
+ M_UNKNOWN = 0,
+ M_68010 = 1,
+ M_68020 = 2,
+ M_SPARC = 3,
+ /* skip a bunch so we don't run into any of suns numbers */
+ M_386 = 100,
+ M_29K = 101, /* AMD 29000 */
+ M_386_DYNIX = 102, /* Sequent running dynix */
+ M_386_NETBSD = 134, /* NetBSD/386 binary */
+ M_MIPS1 = 151, /* MIPS R2000/R3000 binary */
+ M_MIPS2 = 152, /* MIPS R4000/R6000 binary */
+ M_HP200 = 200, /* HP 200 (68010) BSD binary */
+ M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary */
+ M_HPUX = (0x20c % 256)/* HP 200/300 HPUX binary */
+};
+
+#define N_DYNAMIC(exec) ((exec).a_info & 0x8000000)
- We try to encapsulate the differences in a few routines, and otherwise
- share large masses of code. This means we only have to fix bugs in
- one place, most of the time. */
+#ifndef N_MAGIC
+# define N_MAGIC(exec) ((exec).a_info & 0xffff)
+#endif
-/** a.out files */
+#ifndef N_MACHTYPE
+# define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
+#endif
-#define exec_hdr(bfd) (((struct sunexdata *) ((bfd)->tdata))->hdr)
-/*#define obj_symbols(bfd) ((((struct sunexdata *) ((bfd)->tdata))->symbols))*/
-#define obj_textsec(bfd) (((struct sunexdata *) ((bfd)->tdata))->textsec)
-#define obj_datasec(bfd) (((struct sunexdata *) ((bfd)->tdata))->datasec)
-#define obj_bsssec(bfd) (((struct sunexdata *) ((bfd)->tdata))->bsssec)
-#define obj_sym_filepos(bfd) (((struct sunexdata *) ((bfd)->tdata))->sym_filepos)
-#define obj_str_filepos(bfd) (((struct sunexdata *) ((bfd)->tdata))->str_filepos)
+#ifndef N_FLAGS
+# define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
+#endif
+#ifndef N_SET_INFO
+# define N_SET_INFO(exec, magic, type, flags) \
+((exec).a_info = ((magic) & 0xffff) \
+ | (((int)(type) & 0xff) << 16) \
+ | (((flags) & 0xff) << 24))
+#endif
+#ifndef N_SET_MAGIC
+# define N_SET_MAGIC(exec, magic) \
+((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
+#endif
-typedef struct {
+#ifndef N_SET_MACHTYPE
+# define N_SET_MACHTYPE(exec, machtype) \
+((exec).a_info = \
+ ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
+#endif
+
+#ifndef N_SET_FLAGS
+# define N_SET_FLAGS(exec, flags) \
+((exec).a_info = \
+ ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
+#endif
+
+typedef struct aout_symbol {
asymbol symbol;
short desc;
-char other;
-unsigned char type;
+ char other;
+ unsigned char type;
} aout_symbol_type;
+/* The `tdata' struct for all a.out-like object file formats.
+ Various things depend on this struct being around any time an a.out
+ file is being handled. An example is dbxread.c in GDB. */
-struct sunexdata {
- struct exec *hdr; /* exec file header */
+struct aoutdata {
+ struct internal_exec *hdr; /* exec file header */
aout_symbol_type *symbols; /* symtab for input bfd */
-
/* For ease, we do this */
asection *textsec;
no dependencies on the particular format of the exec_hdr. */
file_ptr sym_filepos;
file_ptr str_filepos;
-};
+ /* Size of a relocation entry in external form */
+ unsigned reloc_entry_size;
-#define obj_outsymbols(bfd) ((void *)(((struct sunexdata *) ((bfd)->tdata))->outsymbols))
+ /* Size of a symbol table entry in external form */
+ unsigned symbol_entry_size;
+ /* Page size - needed for alignment of demand paged files. */
+ unsigned long page_size;
+ /* Segment size - needed for alignment of demand paged files. */
+ unsigned long segment_size;
-/* We case the address of the first element of a asymbol to ensure that the
- * macro is only every applied to an asymbol
- */
+ unsigned exec_bytes_size;
+ unsigned vma_adjusted : 1;
+
+ /* used when a bfd supports several highly similar formats */
+ enum {
+ default_format = 0,
+ gnu_encap_format } subformat;
+
+ enum {
+ undecided_magic = 0,
+ z_magic,
+ o_magic,
+ n_magic } magic;
+
+ /* The external symbol information. */
+ struct external_nlist *external_syms;
+ bfd_size_type external_sym_count;
+ char *external_strings;
+ struct aout_link_hash_entry **sym_hashes;
+};
+
+struct aout_data_struct {
+ struct aoutdata a;
+ struct internal_exec e;
+};
+
+#define adata(bfd) ((bfd)->tdata.aout_data->a)
+#define exec_hdr(bfd) (adata(bfd).hdr)
+#define obj_aout_symbols(bfd) (adata(bfd).symbols)
+#define obj_textsec(bfd) (adata(bfd).textsec)
+#define obj_datasec(bfd) (adata(bfd).datasec)
+#define obj_bsssec(bfd) (adata(bfd).bsssec)
+#define obj_sym_filepos(bfd) (adata(bfd).sym_filepos)
+#define obj_str_filepos(bfd) (adata(bfd).str_filepos)
+#define obj_reloc_entry_size(bfd) (adata(bfd).reloc_entry_size)
+#define obj_symbol_entry_size(bfd) (adata(bfd).symbol_entry_size)
+#define obj_aout_subformat(bfd) (adata(bfd).subformat)
+#define obj_aout_external_syms(bfd) (adata(bfd).external_syms)
+#define obj_aout_external_sym_count(bfd) (adata(bfd).external_sym_count)
+#define obj_aout_external_strings(bfd) (adata(bfd).external_strings)
+#define obj_aout_sym_hashes(bfd) (adata(bfd).sym_hashes)
+
+/* We take the address of the first element of an asymbol to ensure that the
+ macro is only ever applied to an asymbol */
#define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
-/*#define obj_symbols(bfd) ((((struct sunexdata *) ((bfd)->tdata))->symbols))*/
-#define obj_aout_symbols(bfd) ((((struct sunexdata *) (bfd)->tdata))->symbols)
-#define obj_arch_flags(bfd) ((((struct sunexdata *) (bfd)->tdata))->arch_flags)
+/* Prototype declarations for functions defined in aoutx.h */
+
+boolean
+NAME(aout,squirt_out_relocs) PARAMS ((bfd *abfd, asection *section));
+
+bfd_target *
+NAME(aout,some_aout_object_p) PARAMS ((bfd *abfd,
+ struct internal_exec *execp,
+ bfd_target * (*callback)(bfd *)));
+
+boolean
+NAME(aout,mkobject) PARAMS ((bfd *abfd));
+
+enum machine_type
+NAME(aout,machine_type) PARAMS ((enum bfd_architecture arch,
+ unsigned long machine));
+
+boolean
+NAME(aout,set_arch_mach) PARAMS ((bfd *abfd, enum bfd_architecture arch,
+ unsigned long machine));
+
+boolean
+NAME(aout,new_section_hook) PARAMS ((bfd *abfd, asection *newsect));
+
+boolean
+NAME(aout,set_section_contents) PARAMS ((bfd *abfd, sec_ptr section,
+ PTR location, file_ptr offset, bfd_size_type count));
+
+asymbol *
+NAME(aout,make_empty_symbol) PARAMS ((bfd *abfd));
+
+boolean
+NAME(aout,slurp_symbol_table) PARAMS ((bfd *abfd));
+
+boolean
+NAME(aout,write_syms) PARAMS ((bfd *abfd));
+
+void
+NAME(aout,reclaim_symbol_table) PARAMS ((bfd *abfd));
+
+unsigned int
+NAME(aout,get_symtab_upper_bound) PARAMS ((bfd *abfd));
+
+unsigned int
+NAME(aout,get_symtab) PARAMS ((bfd *abfd, asymbol **location));
+
+boolean
+NAME(aout,slurp_reloc_table) PARAMS ((bfd *abfd, sec_ptr asect,
+ asymbol **symbols));
+
+unsigned int
+NAME(aout,canonicalize_reloc) PARAMS ((bfd *abfd, sec_ptr section,
+ arelent **relptr, asymbol **symbols));
+
+unsigned int
+NAME(aout,get_reloc_upper_bound) PARAMS ((bfd *abfd, sec_ptr asect));
+
+void
+NAME(aout,reclaim_reloc) PARAMS ((bfd *ignore_abfd, sec_ptr ignore));
+
+alent *
+NAME(aout,get_lineno) PARAMS ((bfd *ignore_abfd, asymbol *ignore_symbol));
+
+void
+NAME(aout,print_symbol) PARAMS ((bfd *ignore_abfd, PTR file,
+ asymbol *symbol, bfd_print_symbol_type how));
+
+void
+NAME(aout,get_symbol_info) PARAMS ((bfd *ignore_abfd,
+ asymbol *symbol, symbol_info *ret));
+
+boolean
+NAME(aout,close_and_cleanup) PARAMS ((bfd *abfd));
+
+boolean
+NAME(aout,find_nearest_line) PARAMS ((bfd *abfd, asection *section,
+ asymbol **symbols, bfd_vma offset, CONST char **filename_ptr,
+ CONST char **functionname_ptr, unsigned int *line_ptr));
+
+int
+NAME(aout,sizeof_headers) PARAMS ((bfd *abfd, boolean exec));
+
+boolean
+NAME(aout,adjust_sizes_and_vmas) PARAMS ((bfd *abfd,
+ bfd_size_type *text_size, file_ptr *text_end));
+
+void
+NAME(aout,swap_exec_header_in) PARAMS ((bfd *abfd,
+ struct external_exec *raw_bytes, struct internal_exec *execp));
+
+void
+NAME(aout,swap_exec_header_out) PARAMS ((bfd *abfd,
+ struct internal_exec *execp, struct external_exec *raw_bytes));
+
+struct bfd_link_hash_table *
+NAME(aout,link_hash_table_create) PARAMS ((bfd *));
+
+boolean
+NAME(aout,link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
+
+boolean
+NAME(aout,final_link) PARAMS ((bfd *, struct bfd_link_info *,
+ void (*) (bfd *, file_ptr *, file_ptr *,
+ file_ptr *)));
+
+/* Prototypes for functions in stab-syms.c. */
+
+CONST char *
+aout_stab_name PARAMS ((int code));
+
+/* A.out uses the generic versions of these routines... */
-#define get_tdata(x) ((struct sunexdata *)((x)->tdata))
-#define set_tdata(x,y) ((x)->tdata = (void *) (y))
+#define aout_32_get_section_contents bfd_generic_get_section_contents
+#define aout_32_close_and_cleanup bfd_generic_close_and_cleanup
+#define aout_64_get_section_contents bfd_generic_get_section_contents
+#define aout_64_close_and_cleanup bfd_generic_close_and_cleanup
+#ifndef NO_WRITE_HEADER_KLUDGE
+#define NO_WRITE_HEADER_KLUDGE 0
+#endif
+#ifndef WRITE_HEADERS
+#define WRITE_HEADERS(abfd, execp) \
+ { \
+ bfd_size_type text_size; /* dummy vars */ \
+ file_ptr text_end; \
+ if (adata(abfd).magic == undecided_magic) \
+ NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); \
+ \
+ execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \
+ execp->a_entry = bfd_get_start_address (abfd); \
+ \
+ execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \
+ obj_reloc_entry_size (abfd)); \
+ execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \
+ obj_reloc_entry_size (abfd)); \
+ NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \
+ \
+ bfd_seek (abfd, (file_ptr) 0, SEEK_SET); \
+ bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd); \
+ /* Now write out reloc info, followed by syms and strings */ \
+ \
+ if (bfd_get_outsymbols (abfd) != (asymbol **) NULL \
+ && bfd_get_symcount (abfd) != 0) \
+ { \
+ bfd_seek (abfd, (file_ptr)(N_SYMOFF(*execp)), SEEK_SET); \
+ \
+ if (! NAME(aout,write_syms)(abfd)) return false; \
+ \
+ bfd_seek (abfd, (file_ptr)(N_TRELOFF(*execp)), SEEK_SET); \
+ \
+ if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) return false; \
+ bfd_seek (abfd, (file_ptr)(N_DRELOFF(*execp)), SEEK_SET); \
+ \
+ if (!NAME(aout,squirt_out_relocs)(abfd, obj_datasec (abfd))) return false; \
+ } \
+ }
+#endif
projects / deliverable / binutils-gdb.git / blobdiff