-/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
+/* BFD back-end data structures for a.out (and similar) files.
+ Copyright (C) 1990-1991 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. */
+
+/* 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. */
/* $Id$ */
-/* BFD back-end data structures for a.out (and similar) files.
+#ifdef __STDC__
+#define CAT3(a,b,c) a##b##c
+#else
+#define CAT3(a,b,c) a/**/b/**/c
+#endif
+
+/* 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 (int64_type)GET_WORD
+#define PUT_WORD bfd_h_put_64
+#define NAME(x,y) CAT3(x,_64_,y)
+#define JNAME(x) CAT(x,_64)
+#define BYTES_IN_WORD 8
+#else
+#define GET_WORD bfd_h_get_32
+#define GET_SWORD (int32_type)GET_WORD
+#define PUT_WORD bfd_h_put_32
+#define NAME(x,y) CAT3(x,_32_,y)
+#define JNAME(x) CAT(x,_32)
+#define BYTES_IN_WORD 4
+#endif
- 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. */
+/* Declare these types at file level, since they are used in parameter
+ lists, which have wierd scope. */
+struct external_exec;
+struct internal_exec;
-/** a.out files */
+/* 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). */
-#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)
+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 */
+};
+
+/* Magic number is written
+< MSB >
+3130292827262524232221201918171615141312111009080706050403020100
+< FLAGS >< MACHINE TYPE >< MAGIC NUMBER >
+*/
+enum machine_type {
+ M_UNKNOWN = 0,
+ M_68010 = 1,
+ M_68020 = 2,
+ M_SPARC = 3,
+ /* skip a bunch so we dont run into any of suns numbers */
+ M_386 = 100,
+ M_29K = 101,
+ 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)
+#define N_MAGIC(exec) ((exec).a_info & 0xffff)
+#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
+#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
+#define N_SET_INFO(exec, magic, type, flags) \
+((exec).a_info = ((magic) & 0xffff) \
+ | (((int)(type) & 0xff) << 16) \
+ | (((flags) & 0xff) << 24))
-typedef struct {
+#define N_SET_MAGIC(exec, magic) \
+((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
+
+#define N_SET_MACHTYPE(exec, machtype) \
+((exec).a_info = \
+ ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
+
+#define N_SET_FLAGS(exec, flags) \
+((exec).a_info = \
+ ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
+
+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) ((PTR)(((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;
+};
+
+#define adata(bfd) ((struct aoutdata *) ((bfd)->tdata))
+#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)
+
+/* 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 */
+
+PROTO (boolean, NAME(aout,squirt_out_relocs),(bfd *abfd, asection *section));
+
+PROTO (bfd_target *, NAME(aout,some_aout_object_p), (bfd *abfd,
+ struct internal_exec *execp,
+ bfd_target *(*callback)()));
+PROTO (boolean, NAME(aout,mkobject), (bfd *abfd));
+PROTO (enum machine_type, NAME(aout,machine_type), (enum bfd_architecture arch,
+ unsigned long machine));
+PROTO (boolean, NAME(aout,set_arch_mach), (bfd *abfd, enum bfd_architecture arch,
+ unsigned long machine));
+
+PROTO (boolean, NAME(aout,new_section_hook), (bfd *abfd, asection *newsect));
+PROTO (boolean, NAME(aout,set_section_contents), (bfd *abfd, sec_ptr section,
+ PTR location, file_ptr offset, bfd_size_type count));
+
+PROTO (asymbol *,NAME(aout,make_empty_symbol), (bfd *abfd));
+PROTO (boolean, NAME(aout,slurp_symbol_table), (bfd *abfd));
+PROTO (void, NAME(aout,write_syms), (bfd *abfd));
+PROTO (void, NAME(aout,reclaim_symbol_table), (bfd *abfd));
+PROTO (unsigned int, NAME(aout,get_symtab_upper_bound), (bfd *abfd));
+PROTO (unsigned int, NAME(aout,get_symtab), (bfd *abfd, asymbol **location));
+PROTO (boolean, NAME(aout,slurp_reloc_table), (bfd *abfd, sec_ptr asect,
+ asymbol **symbols));
+PROTO (unsigned int, NAME(aout,canonicalize_reloc), (bfd *abfd, sec_ptr section,
+ arelent **relptr, asymbol **symbols));
+PROTO (unsigned int, NAME(aout,get_reloc_upper_bound), (bfd *abfd, sec_ptr asect));
+PROTO (void, NAME(aout,reclaim_reloc), (bfd *ignore_abfd, sec_ptr ignore));
+PROTO (alent *, NAME(aout,get_lineno), (bfd *ignore_abfd, asymbol *ignore_symbol));
+PROTO (void, NAME(aout,print_symbol), (bfd *ignore_abfd, PTR file,
+ asymbol *symbol, bfd_print_symbol_type how));
+PROTO (boolean, NAME(aout,close_and_cleanup), (bfd *abfd));
+PROTO (boolean, NAME(aout,find_nearest_line), (bfd *abfd, asection *section,
+ asymbol **symbols, bfd_vma offset, CONST char **filename_ptr,
+ CONST char **functionname_ptr, unsigned int *line_ptr));
+PROTO (int, NAME(aout,sizeof_headers), (bfd *ignore_abfd, boolean exec));
+
+
+PROTO (void, NAME(aout,swap_exec_header_in), (bfd *abfd,
+ struct external_exec *raw_bytes, struct internal_exec *execp));
+
+PROTO (void, NAME(aout,swap_exec_header_out),(bfd *abfd, struct internal_exec *execp,
+ struct external_exec *raw_bytes));
+
+/* A.out uses the generic versions of these routines... */
+
+#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
-#define get_tdata(x) ((struct sunexdata *)((x)->tdata))
-#define set_tdata(x,y) ((x)->tdata = (PTR) (y))
+/* Calculate the file positions of the parts of a newly read aout header */
+#define WORK_OUT_FILE_POSITIONS(abfd, execp) \
+ /* The virtual memory addresses of the sections */ \
+ obj_datasec (abfd)->vma = N_DATADDR(*execp); \
+ obj_bsssec (abfd)->vma = N_BSSADDR(*execp); \
+ obj_textsec (abfd)->vma = N_TXTADDR(*execp); \
+ \
+ /* The file offsets of the sections */ \
+ obj_textsec (abfd)->filepos = N_TXTOFF (*execp); \
+ obj_datasec (abfd)->filepos = N_DATOFF (*execp); \
+ \
+ /* The file offsets of the relocation info */ \
+ obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp); \
+ obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp); \
+ \
+ /* The file offsets of the string table and symbol table. */ \
+ obj_sym_filepos (abfd) = N_SYMOFF (*execp); \
+ obj_str_filepos (abfd) = N_STROFF (*execp); \
+#define WRITE_HEADERS(abfd, execp) \
+ { \
+ if (abfd->flags & D_PAGED) \
+ { \
+ execp->a_text = obj_textsec (abfd)->size; \
+ /* Kludge to distinguish old- and new-style ZMAGIC. \
+ The latter includes the exec header in the text size. */ \
+ if (obj_textsec(abfd)->filepos == EXEC_BYTES_SIZE) \
+ execp->a_text += EXEC_BYTES_SIZE; \
+ N_SET_MAGIC (*execp, ZMAGIC); \
+ } \
+ else \
+ { \
+ execp->a_text = obj_textsec (abfd)->size; \
+ if (abfd->flags & WP_TEXT) \
+ { N_SET_MAGIC (*execp, NMAGIC); } \
+ else \
+ { N_SET_MAGIC(*execp, OMAGIC); } \
+ } \
+ if (abfd->flags & D_PAGED) \
+ { \
+ data_pad = ALIGN(obj_datasec(abfd)->size, PAGE_SIZE) \
+ - obj_datasec(abfd)->size; \
+ \
+ if (data_pad > obj_bsssec(abfd)->size) \
+ execp->a_bss = 0; \
+ else \
+ execp->a_bss = obj_bsssec(abfd)->size - data_pad; \
+ execp->a_data = obj_datasec(abfd)->size + data_pad; \
+ } \
+ else \
+ { \
+ execp->a_data = obj_datasec (abfd)->size; \
+ execp->a_bss = obj_bsssec (abfd)->size; \
+ } \
+ \
+ 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, 0L, false); \
+ bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd); \
+ /* Now write out reloc info, followed by syms and strings */ \
+ \
+ if (bfd_get_symcount (abfd) != 0) \
+ { \
+ bfd_seek (abfd, \
+ (long)(N_SYMOFF(*execp)), false); \
+ \
+ NAME(aout,write_syms)(abfd); \
+ \
+ bfd_seek (abfd, (long)(N_TRELOFF(*execp)), false); \
+ \
+ if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) return false; \
+ bfd_seek (abfd, (long)(N_DRELOFF(*execp)), false); \
+ \
+ if (!NAME(aout,squirt_out_relocs)(abfd, obj_datasec (abfd))) return false; \
+ } \
+ }
projects / binutils.git / blobdiff