* host-aout.c: New strategy. We use common code, include files,
and data structures to handle the file, but set a few parameters from the host's config file (page size, text start addr, etc). * libaout.h: Define HP BSD machine types.
This commit is contained in:
John Gilmore
parent
d8474a9bc1
commit
0fa4f690d6
1 changed files with 102 additions and 32 deletions
134
bfd/libaout.h
134
bfd/libaout.h
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@ -48,21 +48,74 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#define BYTES_IN_WORD 4
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#endif
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#define adata(bfd) ((struct aoutdata *) ((bfd)->tdata))
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#define exec_hdr(bfd) (adata(bfd)->hdr)
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#define obj_textsec(bfd) (adata(bfd)->textsec)
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#define obj_datasec(bfd) (adata(bfd)->datasec)
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#define obj_bsssec(bfd) (adata(bfd)->bsssec)
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#define obj_sym_filepos(bfd) (adata(bfd)->sym_filepos)
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#define obj_str_filepos(bfd) (adata(bfd)->str_filepos)
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#define obj_reloc_entry_size(bfd) (adata(bfd)->reloc_entry_size)
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/* Declare these types at file level, since they are used in parameter
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lists, which have wierd scope. */
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struct external_exec;
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struct internal_exec;
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/* This is the layout in memory of a "struct exec" while we process it.
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All 'lengths' are given as a number of bytes.
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All 'alignments' are for relinkable files only; an alignment of
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'n' indicates the corresponding segment must begin at an
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address that is a multiple of (2**n). */
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struct internal_exec
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{
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long a_info; /* Magic number and flags, packed */
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bfd_vma a_text; /* length of text, in bytes */
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bfd_vma a_data; /* length of data, in bytes */
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bfd_vma a_bss; /* length of uninitialized data area in mem */
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bfd_vma a_syms; /* length of symbol table data in file */
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bfd_vma a_entry; /* start address */
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bfd_vma a_trsize; /* length of text's relocation info, in bytes */
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bfd_vma a_drsize; /* length of data's relocation info, in bytes */
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/* Added for i960 */
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bfd_vma a_tload; /* Text runtime load address */
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bfd_vma a_dload; /* Data runtime load address */
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unsigned char a_talign; /* Alignment of text segment */
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unsigned char a_dalign; /* Alignment of data segment */
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unsigned char a_balign; /* Alignment of bss segment */
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};
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/* Magic number is written
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< MSB >
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3130292827262524232221201918171615141312111009080706050403020100
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< FLAGS >< MACHINE TYPE >< MAGIC NUMBER >
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*/
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enum machine_type {
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M_UNKNOWN = 0,
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M_68010 = 1,
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M_68020 = 2,
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M_SPARC = 3,
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/* skip a bunch so we dont run into any of suns numbers */
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M_386 = 100,
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M_29K = 101,
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M_HP200 = 200, /* HP 200 (68010) BSD binary */
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M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary */
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M_HPUX = (0x20c % 256),/* HP 200/300 HPUX binary */
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};
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#define N_DYNAMIC(exec) ((exec).a_info & 0x8000000)
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#define N_MAGIC(exec) ((exec).a_info & 0xffff)
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#define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
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#define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
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#define N_SET_INFO(exec, magic, type, flags) \
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((exec).a_info = ((magic) & 0xffff) \
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| (((int)(type) & 0xff) << 16) \
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| (((flags) & 0xff) << 24))
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#define N_SET_MAGIC(exec, magic) \
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((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
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#define N_SET_MACHTYPE(exec, machtype) \
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((exec).a_info = \
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((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
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#define N_SET_FLAGS(exec, flags) \
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((exec).a_info = \
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((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
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typedef struct aout_symbol {
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asymbol symbol;
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short desc;
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@ -70,10 +123,13 @@ typedef struct aout_symbol {
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unsigned char type;
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} aout_symbol_type;
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struct aoutdata {
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struct internal_exec *hdr; /* exec file header */
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aout_symbol_type *symbols; /* symtab for input bfd */
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/* The `tdata' struct for all a.out-like object file formats.
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Various things depend on this struct being around any time an a.out
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file is being handled. An example is dbxread.c in GDB. */
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struct aoutdata {
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struct internal_exec *hdr; /* exec file header */
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aout_symbol_type *symbols; /* symtab for input bfd */
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/* For ease, we do this */
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asection *textsec;
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@ -85,29 +141,42 @@ struct aoutdata {
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file_ptr sym_filepos;
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file_ptr str_filepos;
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/* Size of a relocation entry */
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/* Size of a relocation entry in external form */
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unsigned reloc_entry_size;
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/* Size of a symbol table entry in external form */
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unsigned symbol_entry_size;
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/* Page size - needed for alignment of demand paged files. */
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unsigned long page_size;
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/* Segment size - needed for alignment of demand paged files. */
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unsigned long segment_size;
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unsigned exec_bytes_size;
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};
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#define obj_outsymbols(bfd) ((PTR)(((struct aoutdata *) ((bfd)->tdata))->outsymbols))
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#define adata(bfd) ((struct aoutdata *) ((bfd)->tdata))
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#define exec_hdr(bfd) (adata(bfd)->hdr)
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#define obj_aout_symbols(bfd) (adata(bfd)->symbols)
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#define obj_textsec(bfd) (adata(bfd)->textsec)
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#define obj_datasec(bfd) (adata(bfd)->datasec)
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#define obj_bsssec(bfd) (adata(bfd)->bsssec)
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#define obj_sym_filepos(bfd) (adata(bfd)->sym_filepos)
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#define obj_str_filepos(bfd) (adata(bfd)->str_filepos)
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#define obj_reloc_entry_size(bfd) (adata(bfd)->reloc_entry_size)
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#define obj_symbol_entry_size(bfd) (adata(bfd)->symbol_entry_size)
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/* We take the address of the first element of an asymbol to ensure that the
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* macro is only ever applied to an asymbol */
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macro is only ever applied to an asymbol */
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#define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
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/*#define obj_symbols(bfd) ((((struct aoutdata *) ((bfd)->tdata))->symbols))*/
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#define obj_aout_symbols(bfd) ((((struct aoutdata *) (bfd)->tdata))->symbols)
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#define obj_arch_flags(bfd) ((((struct aoutdata *) (bfd)->tdata))->arch_flags)
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#define get_tdata(x) ((struct aoutdata *)((x)->tdata))
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/* Prototype declarations for functions defined in aoutx.h */
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PROTO (boolean, NAME(aout,squirt_out_relocs),(bfd *abfd, asection *section));
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PROTO (bfd_target *, NAME(aout,some_aout_object_p), (bfd *abfd,
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struct internal_exec *execp,
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bfd_target *(*callback)()));
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PROTO (boolean, NAME(aout,mkobject), (bfd *abfd));
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PROTO (enum machine_type, NAME(aout,machine_type), (enum bfd_architecture arch,
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@ -157,6 +226,7 @@ PROTO (void, NAME(aout,swap_exec_header_out),(bfd *abfd, struct internal_exec *e
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/* Calculate the file positions of the parts of a newly read aout header */
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#define WORK_OUT_FILE_POSITIONS(abfd, execp) \
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/* The virtual memory addresses of the sections */ \
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obj_datasec (abfd)->vma = N_DATADDR(*execp); \
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obj_bsssec (abfd)->vma = N_BSSADDR(*execp); \
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obj_textsec (abfd)->vma = N_TXTADDR(*execp); \
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@ -176,13 +246,13 @@ PROTO (void, NAME(aout,swap_exec_header_out),(bfd *abfd, struct internal_exec *e
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#define WRITE_HEADERS(abfd, execp) \
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{ \
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if ((obj_textsec(abfd)->vma & 0xff )== EXEC_BYTES_SIZE) \
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abfd->flags |= D_PAGED; \
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else \
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abfd->flags &= ~D_PAGED; \
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if (abfd->flags & D_PAGED) \
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{ \
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execp->a_text = obj_textsec (abfd)->size + EXEC_BYTES_SIZE; \
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execp->a_text = obj_textsec (abfd)->size; \
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/* Kludge to distinguish old- and new-style ZMAGIC. \
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The latter includes the exec header in the text size. */ \
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if (obj_textsec(abfd)->filepos == EXEC_BYTES_SIZE) \
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execp->a_text += EXEC_BYTES_SIZE; \
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N_SET_MAGIC (*execp, ZMAGIC); \
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} \
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else \
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@ -195,8 +265,8 @@ PROTO (void, NAME(aout,swap_exec_header_out),(bfd *abfd, struct internal_exec *e
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} \
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if (abfd->flags & D_PAGED) \
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{ \
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data_pad = ((obj_datasec(abfd)->size + PAGE_SIZE -1) \
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& (- PAGE_SIZE)) - obj_datasec(abfd)->size; \
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data_pad = ALIGN(obj_datasec(abfd)->size, PAGE_SIZE) \
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- obj_datasec(abfd)->size; \
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\
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if (data_pad > obj_bsssec(abfd)->size) \
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execp->a_bss = 0; \
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@ -210,7 +280,7 @@ PROTO (void, NAME(aout,swap_exec_header_out),(bfd *abfd, struct internal_exec *e
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execp->a_bss = obj_bsssec (abfd)->size; \
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} \
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\
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execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_LIST_SIZE; \
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execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \
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execp->a_entry = bfd_get_start_address (abfd); \
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\
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execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \
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