diff options
Diffstat (limited to 'binutils-2.19/bfd/pdp11.c')
-rw-r--r-- | binutils-2.19/bfd/pdp11.c | 4544 |
1 files changed, 4544 insertions, 0 deletions
diff --git a/binutils-2.19/bfd/pdp11.c b/binutils-2.19/bfd/pdp11.c new file mode 100644 index 0000000..ed2bec1 --- /dev/null +++ b/binutils-2.19/bfd/pdp11.c @@ -0,0 +1,4544 @@ +/* BFD back-end for PDP-11 a.out binaries. + Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 + Free Software Foundation, Inc. + + This file is part of BFD, the Binary File Descriptor library. + + 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 3 of the License, or + (at your option) any later version. + + 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 this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + + +/* BFD backend for PDP-11, running 2.11BSD in particular. + + This file was hacked up by looking hard at the existing vaxnetbsd + back end and the header files in 2.11BSD. + + TODO + * support for V7 file formats + * support for overlay object files (see 2.11 a.out(5)) + * support for old and very old archives + (see 2.11 ar(5), historical section) + + Search for TODO to find other areas needing more work. */ + +#define BYTES_IN_WORD 2 +#define BYTES_IN_LONG 4 +#define ARCH_SIZE 16 +#undef TARGET_IS_BIG_ENDIAN_P + +#define TARGET_PAGE_SIZE 1024 +#define SEGMENT__SIZE TARGET_PAGE_SIZE + +#define DEFAULT_ARCH bfd_arch_pdp11 +#define DEFAULT_MID M_PDP11 + +/* Do not "beautify" the CONCAT* macro args. Traditional C will not + remove whitespace added here, and thus will fail to concatenate + the tokens. */ +#define MY(OP) CONCAT2 (pdp11_aout_,OP) + +/* This needs to start with a.out so GDB knows it is an a.out variant. */ +#define TARGETNAME "a.out-pdp11" + +/* This is the normal load address for executables. */ +#define TEXT_START_ADDR 0 + +/* The header is not included in the text segment. */ +#define N_HEADER_IN_TEXT(x) 0 + +/* There are no shared libraries. */ +#define N_SHARED_LIB(x) 0 + +/* There is no flags field. */ +#define N_FLAGS(exec) 0 + +#define N_SET_FLAGS(exec, flags) do { } while (0) +#define N_BADMAG(x) (((x).a_info != OMAGIC) \ + && ((x).a_info != NMAGIC) \ + && ((x).a_info != A_MAGIC3) \ + && ((x).a_info != A_MAGIC4) \ + && ((x).a_info != A_MAGIC5) \ + && ((x).a_info != A_MAGIC6)) + +#include "sysdep.h" +#include "bfd.h" + +#define external_exec pdp11_external_exec +struct pdp11_external_exec +{ + bfd_byte e_info[2]; /* Magic number. */ + bfd_byte e_text[2]; /* Length of text section in bytes. */ + bfd_byte e_data[2]; /* Length of data section in bytes. */ + bfd_byte e_bss[2]; /* Length of bss area in bytes. */ + bfd_byte e_syms[2]; /* Length of symbol table in bytes. */ + bfd_byte e_entry[2]; /* Start address. */ + bfd_byte e_unused[2]; /* Not used. */ + bfd_byte e_flag[2]; /* Relocation info stripped. */ + bfd_byte e_relocatable; /* Ugly hack. */ +}; + +#define EXEC_BYTES_SIZE (8 * 2) + +#define A_MAGIC1 OMAGIC +#define OMAGIC 0407 /* ...object file or impure executable. */ +#define A_MAGIC2 NMAGIC +#define NMAGIC 0410 /* Pure executable. */ +#define ZMAGIC 0413 /* Demand-paged executable. */ +#define A_MAGIC3 0411 /* Separated I&D. */ +#define A_MAGIC4 0405 /* Overlay. */ +#define A_MAGIC5 0430 /* Auto-overlay (nonseparate). */ +#define A_MAGIC6 0431 /* Auto-overlay (separate). */ +#define QMAGIC 0 +#define BMAGIC 0 + +#define A_FLAG_RELOC_STRIPPED 0x0001 + +#define external_nlist pdp11_external_nlist +struct pdp11_external_nlist +{ + bfd_byte e_unused[2]; /* Unused. */ + bfd_byte e_strx[2]; /* Index into string table of name. */ + bfd_byte e_type[1]; /* Type of symbol. */ + bfd_byte e_ovly[1]; /* Overlay number. */ + bfd_byte e_value[2]; /* Value of symbol. */ +}; + +#define EXTERNAL_NLIST_SIZE 8 + +#define N_TXTOFF(x) (EXEC_BYTES_SIZE) +#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text) +#define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data) +#define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize) +#define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize) +#define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms) + +#define WRITE_HEADERS(abfd, execp) pdp11_aout_write_headers (abfd, execp) + +#include "libbfd.h" +#include "libaout.h" + +#define SWAP_MAGIC(ext) bfd_getl16 (ext) + +#define MY_entry_is_text_address 1 + +#define MY_write_object_contents MY(write_object_contents) +static bfd_boolean MY(write_object_contents) (bfd *); +#define MY_text_includes_header 1 + +#define MY_BFD_TARGET + +#include "aout-target.h" + +/* Start of modified aoutx.h. */ +#define KEEPIT udata.i + +#include <string.h> /* For strchr and friends. */ +#include "bfd.h" +#include "sysdep.h" +#include "safe-ctype.h" +#include "bfdlink.h" + +#include "libaout.h" +#include "aout/aout64.h" +#include "aout/stab_gnu.h" +#include "aout/ar.h" + +#undef N_TYPE +#undef N_UNDF +#undef N_ABS +#undef N_TEXT +#undef N_DATA +#undef N_BSS +#undef N_REG +#undef N_FN +#undef N_EXT +#define N_TYPE 0x1f /* Type mask. */ +#define N_UNDF 0x00 /* Undefined. */ +#define N_ABS 0x01 /* Absolute. */ +#define N_TEXT 0x02 /* Text segment. */ +#define N_DATA 0x03 /* Data segment. */ +#define N_BSS 0x04 /* Bss segment. */ +#define N_REG 0x14 /* Register symbol. */ +#define N_FN 0x1f /* File name. */ +#define N_EXT 0x20 /* External flag. */ + +#define RELOC_SIZE 2 + +#define RELFLG 0x0001 /* PC-relative flag. */ +#define RTYPE 0x000e /* Type mask. */ +#define RIDXMASK 0xfff0 /* Index mask. */ + +#define RABS 0x00 /* Absolute. */ +#define RTEXT 0x02 /* Text. */ +#define RDATA 0x04 /* Data. */ +#define RBSS 0x06 /* Bss. */ +#define REXT 0x08 /* External. */ + +#define RINDEX(x) (((x) & 0xfff0) >> 4) + +#ifndef MY_final_link_relocate +#define MY_final_link_relocate _bfd_final_link_relocate +#endif + +#ifndef MY_relocate_contents +#define MY_relocate_contents _bfd_relocate_contents +#endif + +/* A hash table used for header files with N_BINCL entries. */ + +struct aout_link_includes_table +{ + struct bfd_hash_table root; +}; + +/* A linked list of totals that we have found for a particular header + file. */ + +struct aout_link_includes_totals +{ + struct aout_link_includes_totals *next; + bfd_vma total; +}; + +/* An entry in the header file hash table. */ + +struct aout_link_includes_entry +{ + struct bfd_hash_entry root; + /* List of totals we have found for this file. */ + struct aout_link_includes_totals *totals; +}; + +/* During the final link step we need to pass around a bunch of + information, so we do it in an instance of this structure. */ + +struct aout_final_link_info +{ + /* General link information. */ + struct bfd_link_info *info; + /* Output bfd. */ + bfd *output_bfd; + /* Reloc file positions. */ + file_ptr treloff, dreloff; + /* File position of symbols. */ + file_ptr symoff; + /* String table. */ + struct bfd_strtab_hash *strtab; + /* Header file hash table. */ + struct aout_link_includes_table includes; + /* A buffer large enough to hold the contents of any section. */ + bfd_byte *contents; + /* A buffer large enough to hold the relocs of any section. */ + void * relocs; + /* A buffer large enough to hold the symbol map of any input BFD. */ + int *symbol_map; + /* A buffer large enough to hold output symbols of any input BFD. */ + struct external_nlist *output_syms; +}; + +reloc_howto_type howto_table_pdp11[] = +{ + /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ +HOWTO( 0, 0, 1, 16, FALSE, 0, complain_overflow_signed,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), +HOWTO( 1, 0, 1, 16, TRUE, 0, complain_overflow_signed,0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), +}; + +#define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0])) + + +static bfd_boolean aout_link_check_archive_element (bfd *, struct bfd_link_info *, bfd_boolean *); +static bfd_boolean aout_link_add_object_symbols (bfd *, struct bfd_link_info *); +static bfd_boolean aout_link_add_symbols (bfd *, struct bfd_link_info *); +static bfd_boolean aout_link_write_symbols (struct aout_final_link_info *, bfd *); + + +reloc_howto_type * +NAME (aout, reloc_type_lookup) (bfd * abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + switch (code) + { + case BFD_RELOC_16: + return &howto_table_pdp11[0]; + case BFD_RELOC_16_PCREL: + return &howto_table_pdp11[1]; + default: + return NULL; + } +} + +reloc_howto_type * +NAME (aout, reloc_name_lookup) (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (howto_table_pdp11) / sizeof (howto_table_pdp11[0]); + i++) + if (howto_table_pdp11[i].name != NULL + && strcasecmp (howto_table_pdp11[i].name, r_name) == 0) + return &howto_table_pdp11[i]; + + return NULL; +} + +static int +pdp11_aout_write_headers (bfd *abfd, struct internal_exec *execp) +{ + struct external_exec exec_bytes; + bfd_size_type text_size; + 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); + + if (obj_textsec (abfd)->reloc_count > 0 + || obj_datasec (abfd)->reloc_count > 0) + { + execp->a_trsize = execp->a_text; + execp->a_drsize = execp->a_data; + } + else + { + execp->a_trsize = 0; + execp->a_drsize = 0; + } + + NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes); + + if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) + return FALSE; + + if (bfd_bwrite ((void *) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, abfd) + != EXEC_BYTES_SIZE) + return FALSE; + + /* Now write out reloc info, followed by syms and strings. */ + if (bfd_get_outsymbols (abfd) != NULL + && bfd_get_symcount (abfd) != 0) + { + if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0) + return FALSE; + + if (! NAME (aout, write_syms) (abfd)) + return FALSE; + } + + if (obj_textsec (abfd)->reloc_count > 0 + || obj_datasec (abfd)->reloc_count > 0) + { + if (bfd_seek (abfd, (file_ptr) (N_TRELOFF(*execp)), SEEK_SET) != 0 + || !NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd)) + || bfd_seek (abfd, (file_ptr) (N_DRELOFF(*execp)), SEEK_SET) != 0 + || !NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd))) + return FALSE; + } + + return TRUE; +} + +/* Write an object file. + Section contents have already been written. We write the + file header, symbols, and relocation. */ + +static bfd_boolean +MY(write_object_contents) (bfd *abfd) +{ + struct internal_exec *execp = exec_hdr (abfd); + + /* We must make certain that the magic number has been set. This + will normally have been done by set_section_contents, but only if + there actually are some section contents. */ + if (! abfd->output_has_begun) + { + bfd_size_type text_size; + file_ptr text_end; + + NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end); + } + + obj_reloc_entry_size (abfd) = RELOC_SIZE; + + return WRITE_HEADERS (abfd, execp); +} + +/* Swap the information in an executable header @var{raw_bytes} taken + from a raw byte stream memory image into the internal exec header + structure "execp". */ + +#ifndef NAME_swap_exec_header_in +void +NAME (aout, swap_exec_header_in) (bfd *abfd, + struct external_exec *bytes, + struct internal_exec *execp) +{ + /* The internal_exec structure has some fields that are unused in this + configuration (IE for i960), so ensure that all such uninitialized + fields are zero'd out. There are places where two of these structs + are memcmp'd, and thus the contents do matter. */ + memset ((void *) execp, 0, sizeof (struct internal_exec)); + /* Now fill in fields in the execp, from the bytes in the raw data. */ + execp->a_info = GET_MAGIC (abfd, bytes->e_info); + execp->a_text = GET_WORD (abfd, bytes->e_text); + execp->a_data = GET_WORD (abfd, bytes->e_data); + execp->a_bss = GET_WORD (abfd, bytes->e_bss); + execp->a_syms = GET_WORD (abfd, bytes->e_syms); + execp->a_entry = GET_WORD (abfd, bytes->e_entry); + + if (GET_WORD (abfd, bytes->e_flag) & A_FLAG_RELOC_STRIPPED) + { + execp->a_trsize = 0; + execp->a_drsize = 0; + } + else + { + execp->a_trsize = execp->a_text; + execp->a_drsize = execp->a_data; + } +} +#define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in) +#endif + +/* Swap the information in an internal exec header structure + "execp" into the buffer "bytes" ready for writing to disk. */ +void +NAME (aout, swap_exec_header_out) (bfd *abfd, + struct internal_exec *execp, + struct external_exec *bytes) +{ + /* Now fill in fields in the raw data, from the fields in the exec struct. */ + PUT_MAGIC (abfd, execp->a_info, bytes->e_info); + PUT_WORD (abfd, execp->a_text, bytes->e_text); + PUT_WORD (abfd, execp->a_data, bytes->e_data); + PUT_WORD (abfd, execp->a_bss, bytes->e_bss); + PUT_WORD (abfd, execp->a_syms, bytes->e_syms); + PUT_WORD (abfd, execp->a_entry, bytes->e_entry); + PUT_WORD (abfd, 0, bytes->e_unused); + + if ((execp->a_trsize == 0 || execp->a_text == 0) + && (execp->a_drsize == 0 || execp->a_data == 0)) + PUT_WORD (abfd, A_FLAG_RELOC_STRIPPED, bytes->e_flag); + else if (execp->a_trsize == execp->a_text + && execp->a_drsize == execp->a_data) + PUT_WORD (abfd, 0, bytes->e_flag); + else + { + /* TODO: print a proper warning message. */ + fprintf (stderr, "BFD:%s:%d: internal error\n", __FILE__, __LINE__); + PUT_WORD (abfd, 0, bytes->e_flag); + } +} + +/* Make all the section for an a.out file. */ + +bfd_boolean +NAME (aout, make_sections) (bfd *abfd) +{ + if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL) + return FALSE; + if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL) + return FALSE; + if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL) + return FALSE; + return TRUE; +} + +/* Some a.out variant thinks that the file open in ABFD + checking is an a.out file. Do some more checking, and set up + for access if it really is. Call back to the calling + environment's "finish up" function just before returning, to + handle any last-minute setup. */ + +const bfd_target * +NAME (aout, some_aout_object_p) (bfd *abfd, + struct internal_exec *execp, + const bfd_target *(*callback_to_real_object_p) (bfd *)) +{ + struct aout_data_struct *rawptr, *oldrawptr; + const bfd_target *result; + bfd_size_type amt = sizeof (struct aout_data_struct); + + rawptr = bfd_zalloc (abfd, amt); + if (rawptr == NULL) + return 0; + + oldrawptr = abfd->tdata.aout_data; + abfd->tdata.aout_data = rawptr; + + /* Copy the contents of the old tdata struct. + In particular, we want the subformat, since for hpux it was set in + hp300hpux.c:swap_exec_header_in and will be used in + hp300hpux.c:callback. */ + if (oldrawptr != NULL) + *abfd->tdata.aout_data = *oldrawptr; + + abfd->tdata.aout_data->a.hdr = &rawptr->e; + *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct. */ + execp = abfd->tdata.aout_data->a.hdr; + + /* Set the file flags. */ + abfd->flags = BFD_NO_FLAGS; + if (execp->a_drsize || execp->a_trsize) + abfd->flags |= HAS_RELOC; + /* Setting of EXEC_P has been deferred to the bottom of this function. */ + if (execp->a_syms) + abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; + if (N_DYNAMIC(*execp)) + abfd->flags |= DYNAMIC; + + if (N_MAGIC (*execp) == ZMAGIC) + { + abfd->flags |= D_PAGED | WP_TEXT; + adata (abfd).magic = z_magic; + } + else if (N_MAGIC (*execp) == QMAGIC) + { + abfd->flags |= D_PAGED | WP_TEXT; + adata (abfd).magic = z_magic; + adata (abfd).subformat = q_magic_format; + } + else if (N_MAGIC (*execp) == NMAGIC) + { + abfd->flags |= WP_TEXT; + adata (abfd).magic = n_magic; + } + else if (N_MAGIC (*execp) == OMAGIC + || N_MAGIC (*execp) == BMAGIC) + adata (abfd).magic = o_magic; + else + { + /* Should have been checked with N_BADMAG before this routine + was called. */ + abort (); + } + + bfd_get_start_address (abfd) = execp->a_entry; + + obj_aout_symbols (abfd) = NULL; + bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); + + /* The default relocation entry size is that of traditional V7 Unix. */ + obj_reloc_entry_size (abfd) = RELOC_SIZE; + + /* The default symbol entry size is that of traditional Unix. */ + obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; + +#ifdef USE_MMAP + bfd_init_window (&obj_aout_sym_window (abfd)); + bfd_init_window (&obj_aout_string_window (abfd)); +#endif + + obj_aout_external_syms (abfd) = NULL; + obj_aout_external_strings (abfd) = NULL; + obj_aout_sym_hashes (abfd) = NULL; + + if (! NAME (aout, make_sections) (abfd)) + return NULL; + + obj_datasec (abfd)->size = execp->a_data; + obj_bsssec (abfd)->size = execp->a_bss; + + obj_textsec (abfd)->flags = + (execp->a_trsize != 0 + ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) + : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); + obj_datasec (abfd)->flags = + (execp->a_drsize != 0 + ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) + : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); + obj_bsssec (abfd)->flags = SEC_ALLOC; + +#ifdef THIS_IS_ONLY_DOCUMENTATION + /* The common code can't fill in these things because they depend + on either the start address of the text segment, the rounding + up of virtual addresses between segments, or the starting file + position of the text segment -- all of which varies among different + versions of a.out. */ + + /* Call back to the format-dependent code to fill in the rest of the + fields and do any further cleanup. Things that should be filled + in by the callback: */ + struct exec *execp = exec_hdr (abfd); + + obj_textsec (abfd)->size = N_TXTSIZE(*execp); + /* Data and bss are already filled in since they're so standard. */ + + /* The virtual memory addresses of the sections. */ + obj_textsec (abfd)->vma = N_TXTADDR(*execp); + obj_datasec (abfd)->vma = N_DATADDR(*execp); + obj_bsssec (abfd)->vma = N_BSSADDR(*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_str_filepos (abfd) = N_STROFF (*execp); + obj_sym_filepos (abfd) = N_SYMOFF (*execp); + + /* Determine the architecture and machine type of the object file. */ + abfd->obj_arch = bfd_arch_obscure; + + adata(abfd)->page_size = TARGET_PAGE_SIZE; + adata(abfd)->segment_size = SEGMENT_SIZE; + adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE; + + return abfd->xvec; + + /* The architecture is encoded in various ways in various a.out variants, + or is not encoded at all in some of them. The relocation size depends + on the architecture and the a.out variant. Finally, the return value + is the bfd_target vector in use. If an error occurs, return zero and + set bfd_error to the appropriate error code. + + Formats such as b.out, which have additional fields in the a.out + header, should cope with them in this callback as well. */ +#endif /* DOCUMENTATION */ + + result = (*callback_to_real_object_p)(abfd); + + /* Now that the segment addresses have been worked out, take a better + guess at whether the file is executable. If the entry point + is within the text segment, assume it is. (This makes files + executable even if their entry point address is 0, as long as + their text starts at zero.). + + This test had to be changed to deal with systems where the text segment + runs at a different location than the default. The problem is that the + entry address can appear to be outside the text segment, thus causing an + erroneous conclusion that the file isn't executable. + + To fix this, we now accept any non-zero entry point as an indication of + executability. This will work most of the time, since only the linker + sets the entry point, and that is likely to be non-zero for most systems. */ + + if (execp->a_entry != 0 + || (execp->a_entry >= obj_textsec(abfd)->vma + && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->size)) + abfd->flags |= EXEC_P; +#ifdef STAT_FOR_EXEC + else + { + struct stat stat_buf; + + /* The original heuristic doesn't work in some important cases. + The a.out file has no information about the text start + address. For files (like kernels) linked to non-standard + addresses (ld -Ttext nnn) the entry point may not be between + the default text start (obj_textsec(abfd)->vma) and + (obj_textsec(abfd)->vma) + text size. This is not just a mach + issue. Many kernels are loaded at non standard addresses. */ + if (abfd->iostream != NULL + && (abfd->flags & BFD_IN_MEMORY) == 0 + && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) + && ((stat_buf.st_mode & 0111) != 0)) + abfd->flags |= EXEC_P; + } +#endif /* STAT_FOR_EXEC */ + + if (!result) + { + free (rawptr); + abfd->tdata.aout_data = oldrawptr; + } + return result; +} + +/* Initialize ABFD for use with a.out files. */ + +bfd_boolean +NAME (aout, mkobject) (bfd *abfd) +{ + struct aout_data_struct *rawptr; + bfd_size_type amt = sizeof (struct aout_data_struct); + + bfd_set_error (bfd_error_system_call); + + /* Use an intermediate variable for clarity. */ + rawptr = bfd_zalloc (abfd, amt); + + if (rawptr == NULL) + return FALSE; + + abfd->tdata.aout_data = rawptr; + exec_hdr (abfd) = &(rawptr->e); + + obj_textsec (abfd) = NULL; + obj_datasec (abfd) = NULL; + obj_bsssec (abfd) = NULL; + + return TRUE; +} + +/* Keep track of machine architecture and machine type for + a.out's. Return the <<machine_type>> for a particular + architecture and machine, or <<M_UNKNOWN>> if that exact architecture + and machine can't be represented in a.out format. + + If the architecture is understood, machine type 0 (default) + is always understood. */ + +enum machine_type +NAME (aout, machine_type) (enum bfd_architecture arch, + unsigned long machine, + bfd_boolean *unknown) +{ + enum machine_type arch_flags; + + arch_flags = M_UNKNOWN; + *unknown = TRUE; + + switch (arch) + { + case bfd_arch_sparc: + if (machine == 0 + || machine == bfd_mach_sparc + || machine == bfd_mach_sparc_sparclite + || machine == bfd_mach_sparc_v9) + arch_flags = M_SPARC; + else if (machine == bfd_mach_sparc_sparclet) + arch_flags = M_SPARCLET; + break; + + case bfd_arch_m68k: + switch (machine) + { + case 0: arch_flags = M_68010; break; + case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break; + case bfd_mach_m68010: arch_flags = M_68010; break; + case bfd_mach_m68020: arch_flags = M_68020; break; + default: arch_flags = M_UNKNOWN; break; + } + break; + + case bfd_arch_i386: + if (machine == 0 + || machine == bfd_mach_i386_i386 + || machine == bfd_mach_i386_i386_intel_syntax) + arch_flags = M_386; + break; + + case bfd_arch_arm: + if (machine == 0) arch_flags = M_ARM; + break; + + case bfd_arch_mips: + switch (machine) + { + case 0: + case 2000: + case bfd_mach_mips3000: + arch_flags = M_MIPS1; + break; + case bfd_mach_mips4000: /* MIPS3 */ + case bfd_mach_mips4400: + case bfd_mach_mips8000: /* MIPS4 */ + case bfd_mach_mips6000: /* Real MIPS2: */ + arch_flags = M_MIPS2; + break; + default: + arch_flags = M_UNKNOWN; + break; + } + break; + + case bfd_arch_ns32k: + switch (machine) + { + case 0: arch_flags = M_NS32532; break; + case 32032: arch_flags = M_NS32032; break; + case 32532: arch_flags = M_NS32532; break; + default: arch_flags = M_UNKNOWN; break; + } + break; + + case bfd_arch_pdp11: + /* TODO: arch_flags = M_PDP11; */ + *unknown = FALSE; + break; + + case bfd_arch_vax: + *unknown = FALSE; + break; + + default: + arch_flags = M_UNKNOWN; + } + + if (arch_flags != M_UNKNOWN) + *unknown = FALSE; + + return arch_flags; +} + +/* Set the architecture and the machine of the ABFD to the + values ARCH and MACHINE. Verify that @ABFD's format + can support the architecture required. */ + +bfd_boolean +NAME (aout, set_arch_mach) (bfd *abfd, + enum bfd_architecture arch, + unsigned long machine) +{ + if (! bfd_default_set_arch_mach (abfd, arch, machine)) + return FALSE; + + if (arch != bfd_arch_unknown) + { + bfd_boolean unknown; + + NAME (aout, machine_type) (arch, machine, &unknown); + if (unknown) + return FALSE; + } + + obj_reloc_entry_size (abfd) = RELOC_SIZE; + + return (*aout_backend_info(abfd)->set_sizes) (abfd); +} + +static void +adjust_o_magic (bfd *abfd, struct internal_exec *execp) +{ + file_ptr pos = adata (abfd).exec_bytes_size; + bfd_vma vma = 0; + int pad = 0; + + /* Text. */ + obj_textsec (abfd)->filepos = pos; + if (! obj_textsec (abfd)->user_set_vma) + obj_textsec (abfd)->vma = vma; + else + vma = obj_textsec (abfd)->vma; + + pos += obj_textsec (abfd)->size; + vma += obj_textsec (abfd)->size; + + /* Data. */ + if (!obj_datasec (abfd)->user_set_vma) + { + obj_textsec (abfd)->size += pad; + pos += pad; + vma += pad; + obj_datasec (abfd)->vma = vma; + } + else + vma = obj_datasec (abfd)->vma; + obj_datasec (abfd)->filepos = pos; + pos += obj_datasec (abfd)->size; + vma += obj_datasec (abfd)->size; + + /* BSS. */ + if (! obj_bsssec (abfd)->user_set_vma) + { + obj_datasec (abfd)->size += pad; + pos += pad; + vma += pad; + obj_bsssec (abfd)->vma = vma; + } + else + { + /* The VMA of the .bss section is set by the VMA of the + .data section plus the size of the .data section. We may + need to add padding bytes to make this true. */ + pad = obj_bsssec (abfd)->vma - vma; + if (pad > 0) + { + obj_datasec (abfd)->size += pad; + pos += pad; + } + } + obj_bsssec (abfd)->filepos = pos; + + /* Fix up the exec header. */ + execp->a_text = obj_textsec (abfd)->size; + execp->a_data = obj_datasec (abfd)->size; + execp->a_bss = obj_bsssec (abfd)->size; + N_SET_MAGIC (*execp, OMAGIC); +} + +static void +adjust_z_magic (bfd *abfd, struct internal_exec *execp) +{ + bfd_size_type data_pad, text_pad; + file_ptr text_end; + const struct aout_backend_data *abdp; + int ztih; /* Nonzero if text includes exec header. */ + + abdp = aout_backend_info (abfd); + + /* Text. */ + ztih = (abdp != NULL + && (abdp->text_includes_header + || obj_aout_subformat (abfd) == q_magic_format)); + obj_textsec(abfd)->filepos = (ztih + ? adata(abfd).exec_bytes_size + : adata(abfd).zmagic_disk_block_size); + if (! obj_textsec(abfd)->user_set_vma) + { + /* ?? Do we really need to check for relocs here? */ + obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC) + ? 0 + : (ztih + ? (abdp->default_text_vma + + adata (abfd).exec_bytes_size) + : abdp->default_text_vma)); + text_pad = 0; + } + else + { + /* The .text section is being loaded at an unusual address. We + may need to pad it such that the .data section starts at a page + boundary. */ + if (ztih) + text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) + & (adata (abfd).page_size - 1)); + else + text_pad = ((- obj_textsec (abfd)->vma) + & (adata (abfd).page_size - 1)); + } + + /* Find start of data. */ + if (ztih) + { + text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size; + text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; + } + else + { + /* Note that if page_size == zmagic_disk_block_size, then + filepos == page_size, and this case is the same as the ztih + case. */ + text_end = obj_textsec (abfd)->size; + text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; + text_end += obj_textsec (abfd)->filepos; + } + + obj_textsec (abfd)->size += text_pad; + text_end += text_pad; + + /* Data. */ + if (!obj_datasec(abfd)->user_set_vma) + { + bfd_vma vma; + vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->size; + obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); + } + if (abdp && abdp->zmagic_mapped_contiguous) + { + text_pad = (obj_datasec(abfd)->vma + - obj_textsec(abfd)->vma + - obj_textsec(abfd)->size); + obj_textsec(abfd)->size += text_pad; + } + obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos + + obj_textsec (abfd)->size); + + /* Fix up exec header while we're at it. */ + execp->a_text = obj_textsec(abfd)->size; + if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) + execp->a_text += adata(abfd).exec_bytes_size; + if (obj_aout_subformat (abfd) == q_magic_format) + N_SET_MAGIC (*execp, QMAGIC); + else + N_SET_MAGIC (*execp, ZMAGIC); + + /* Spec says data section should be rounded up to page boundary. */ + obj_datasec(abfd)->size + = align_power (obj_datasec(abfd)->size, + obj_bsssec(abfd)->alignment_power); + execp->a_data = BFD_ALIGN (obj_datasec(abfd)->size, + adata(abfd).page_size); + data_pad = execp->a_data - obj_datasec(abfd)->size; + + /* BSS. */ + if (!obj_bsssec(abfd)->user_set_vma) + obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma + + obj_datasec(abfd)->size); + /* If the BSS immediately follows the data section and extra space + in the page is left after the data section, fudge data + in the header so that the bss section looks smaller by that + amount. We'll start the bss section there, and lie to the OS. + (Note that a linker script, as well as the above assignment, + could have explicitly set the BSS vma to immediately follow + the data section.) */ + if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power) + == obj_datasec(abfd)->vma + obj_datasec(abfd)->size) + execp->a_bss = (data_pad > obj_bsssec(abfd)->size) ? 0 : + obj_bsssec(abfd)->size - data_pad; + else + execp->a_bss = obj_bsssec(abfd)->size; +} + +static void +adjust_n_magic (bfd *abfd, struct internal_exec *execp) +{ + file_ptr pos = adata(abfd).exec_bytes_size; + bfd_vma vma = 0; + int pad; + + /* Text. */ + obj_textsec(abfd)->filepos = pos; + if (!obj_textsec(abfd)->user_set_vma) + obj_textsec(abfd)->vma = vma; + else + vma = obj_textsec(abfd)->vma; + pos += obj_textsec(abfd)->size; + vma += obj_textsec(abfd)->size; + + /* Data. */ + obj_datasec(abfd)->filepos = pos; + if (!obj_datasec(abfd)->user_set_vma) + obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); + vma = obj_datasec(abfd)->vma; + + /* Since BSS follows data immediately, see if it needs alignment. */ + vma += obj_datasec(abfd)->size; + pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; + obj_datasec(abfd)->size += pad; + pos += obj_datasec(abfd)->size; + + /* BSS. */ + if (!obj_bsssec(abfd)->user_set_vma) + obj_bsssec(abfd)->vma = vma; + else + vma = obj_bsssec(abfd)->vma; + + /* Fix up exec header. */ + execp->a_text = obj_textsec(abfd)->size; + execp->a_data = obj_datasec(abfd)->size; + execp->a_bss = obj_bsssec(abfd)->size; + N_SET_MAGIC (*execp, NMAGIC); +} + +bfd_boolean +NAME (aout, adjust_sizes_and_vmas) (bfd *abfd, + bfd_size_type *text_size, + file_ptr * text_end ATTRIBUTE_UNUSED) +{ + struct internal_exec *execp = exec_hdr (abfd); + + if (! NAME (aout, make_sections) (abfd)) + return FALSE; + + if (adata(abfd).magic != undecided_magic) + return TRUE; + + obj_textsec(abfd)->size = + align_power(obj_textsec(abfd)->size, + obj_textsec(abfd)->alignment_power); + + *text_size = obj_textsec (abfd)->size; + /* Rule (heuristic) for when to pad to a new page. Note that there + are (at least) two ways demand-paged (ZMAGIC) files have been + handled. Most Berkeley-based systems start the text segment at + (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text + segment right after the exec header; the latter is counted in the + text segment size, and is paged in by the kernel with the rest of + the text. */ + + /* This perhaps isn't the right way to do this, but made it simpler for me + to understand enough to implement it. Better would probably be to go + right from BFD flags to alignment/positioning characteristics. But the + old code was sloppy enough about handling the flags, and had enough + other magic, that it was a little hard for me to understand. I think + I understand it better now, but I haven't time to do the cleanup this + minute. */ + + if (abfd->flags & WP_TEXT) + adata(abfd).magic = n_magic; + else + adata(abfd).magic = o_magic; + +#ifdef BFD_AOUT_DEBUG /* requires gcc2 */ +#if __GNUC__ >= 2 + fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", + ({ char *str; + switch (adata(abfd).magic) { + case n_magic: str = "NMAGIC"; break; + case o_magic: str = "OMAGIC"; break; + case z_magic: str = "ZMAGIC"; break; + default: abort (); + } + str; + }), + obj_textsec(abfd)->vma, obj_textsec(abfd)->size, + obj_textsec(abfd)->alignment_power, + obj_datasec(abfd)->vma, obj_datasec(abfd)->size, + obj_datasec(abfd)->alignment_power, + obj_bsssec(abfd)->vma, obj_bsssec(abfd)->size, + obj_bsssec(abfd)->alignment_power); +#endif +#endif + + switch (adata(abfd).magic) + { + case o_magic: + adjust_o_magic (abfd, execp); + break; + case z_magic: + adjust_z_magic (abfd, execp); + break; + case n_magic: + adjust_n_magic (abfd, execp); + break; + default: + abort (); + } + +#ifdef BFD_AOUT_DEBUG + fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", + obj_textsec(abfd)->vma, obj_textsec(abfd)->size, + obj_textsec(abfd)->filepos, + obj_datasec(abfd)->vma, obj_datasec(abfd)->size, + obj_datasec(abfd)->filepos, + obj_bsssec(abfd)->vma, obj_bsssec(abfd)->size); +#endif + + return TRUE; +} + +/* Called by the BFD in response to a bfd_make_section request. */ + +bfd_boolean +NAME (aout, new_section_hook) (bfd *abfd, asection *newsect) +{ + /* Align to double at least. */ + newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power; + + if (bfd_get_format (abfd) == bfd_object) + { + if (obj_textsec (abfd) == NULL + && !strcmp (newsect->name, ".text")) + { + obj_textsec(abfd)= newsect; + newsect->target_index = N_TEXT; + } + else if (obj_datasec (abfd) == NULL + && !strcmp (newsect->name, ".data")) + { + obj_datasec (abfd) = newsect; + newsect->target_index = N_DATA; + } + else if (obj_bsssec (abfd) == NULL + && !strcmp (newsect->name, ".bss")) + { + obj_bsssec (abfd) = newsect; + newsect->target_index = N_BSS; + } + } + + /* We allow more than three sections internally. */ + return _bfd_generic_new_section_hook (abfd, newsect); +} + +bfd_boolean +NAME (aout, set_section_contents) (bfd *abfd, + sec_ptr section, + const void * location, + file_ptr offset, + bfd_size_type count) +{ + file_ptr text_end; + bfd_size_type text_size; + + if (! abfd->output_has_begun) + { + if (! NAME (aout, adjust_sizes_and_vmas) (abfd, & text_size, & text_end)) + return FALSE; + } + + if (section == obj_bsssec (abfd)) + { + bfd_set_error (bfd_error_no_contents); + return FALSE; + } + + if (section != obj_textsec (abfd) + && section != obj_datasec (abfd)) + { + (*_bfd_error_handler) + ("%s: can not represent section `%s' in a.out object file format", + bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); + bfd_set_error (bfd_error_nonrepresentable_section); + return FALSE; + } + + if (count != 0) + { + if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 + || bfd_bwrite (location, count, abfd) != count) + return FALSE; + } + + return TRUE; +} + +/* Read the external symbols from an a.out file. */ + +static bfd_boolean +aout_get_external_symbols (bfd *abfd) +{ + if (obj_aout_external_syms (abfd) == NULL) + { + bfd_size_type count; + struct external_nlist *syms; + + count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; + +#ifdef USE_MMAP + if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), + exec_hdr (abfd)->a_syms, + &obj_aout_sym_window (abfd), TRUE)) + return FALSE; + syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; +#else + /* We allocate using malloc to make the values easy to free + later on. If we put them on the objalloc it might not be + possible to free them. */ + syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE); + if (syms == NULL && count != 0) + return FALSE; + + if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 + || (bfd_bread (syms, exec_hdr (abfd)->a_syms, abfd) + != exec_hdr (abfd)->a_syms)) + { + free (syms); + return FALSE; + } +#endif + + obj_aout_external_syms (abfd) = syms; + obj_aout_external_sym_count (abfd) = count; + } + + if (obj_aout_external_strings (abfd) == NULL + && exec_hdr (abfd)->a_syms != 0) + { + unsigned char string_chars[BYTES_IN_LONG]; + bfd_size_type stringsize; + char *strings; + + /* Get the size of the strings. */ + if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 + || (bfd_bread ((void *) string_chars, (bfd_size_type) BYTES_IN_LONG, + abfd) != BYTES_IN_LONG)) + return FALSE; + stringsize = H_GET_32 (abfd, string_chars); + +#ifdef USE_MMAP + if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, + &obj_aout_string_window (abfd), TRUE)) + return FALSE; + strings = (char *) obj_aout_string_window (abfd).data; +#else + strings = bfd_malloc (stringsize + 1); + if (strings == NULL) + return FALSE; + + /* Skip space for the string count in the buffer for convenience + when using indexes. */ + if (bfd_bread (strings + 4, stringsize - 4, abfd) != stringsize - 4) + { + free (strings); + return FALSE; + } +#endif + /* Ensure that a zero index yields an empty string. */ + strings[0] = '\0'; + + strings[stringsize - 1] = 0; + + obj_aout_external_strings (abfd) = strings; + obj_aout_external_string_size (abfd) = stringsize; + } + + return TRUE; +} + +/* Translate an a.out symbol into a BFD symbol. The desc, other, type + and symbol->value fields of CACHE_PTR will be set from the a.out + nlist structure. This function is responsible for setting + symbol->flags and symbol->section, and adjusting symbol->value. */ + +static bfd_boolean +translate_from_native_sym_flags (bfd *abfd, + aout_symbol_type *cache_ptr) +{ + flagword visible; + + if (cache_ptr->type == N_FN) + { + asection *sec; + + /* This is a debugging symbol. */ + cache_ptr->symbol.flags = BSF_DEBUGGING; + + /* Work out the symbol section. */ + switch (cache_ptr->type & N_TYPE) + { + case N_TEXT: + case N_FN: + sec = obj_textsec (abfd); + break; + case N_DATA: + sec = obj_datasec (abfd); + break; + case N_BSS: + sec = obj_bsssec (abfd); + break; + default: + case N_ABS: + sec = bfd_abs_section_ptr; + break; + } + + cache_ptr->symbol.section = sec; + cache_ptr->symbol.value -= sec->vma; + + return TRUE; + } + + /* Get the default visibility. This does not apply to all types, so + we just hold it in a local variable to use if wanted. */ + if ((cache_ptr->type & N_EXT) == 0) + visible = BSF_LOCAL; + else + visible = BSF_GLOBAL; + + switch (cache_ptr->type) + { + default: + case N_ABS: case N_ABS | N_EXT: + cache_ptr->symbol.section = bfd_abs_section_ptr; + cache_ptr->symbol.flags = visible; + break; + + case N_UNDF | N_EXT: + if (cache_ptr->symbol.value != 0) + { + /* This is a common symbol. */ + cache_ptr->symbol.flags = BSF_GLOBAL; + cache_ptr->symbol.section = bfd_com_section_ptr; + } + else + { + cache_ptr->symbol.flags = 0; + cache_ptr->symbol.section = bfd_und_section_ptr; + } + break; + + case N_TEXT: case N_TEXT | N_EXT: + cache_ptr->symbol.section = obj_textsec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = visible; + break; + + case N_DATA: case N_DATA | N_EXT: + cache_ptr->symbol.section = obj_datasec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = visible; + break; + + case N_BSS: case N_BSS | N_EXT: + cache_ptr->symbol.section = obj_bsssec (abfd); + cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; + cache_ptr->symbol.flags = visible; + break; + } + + return TRUE; +} + +/* Set the fields of SYM_POINTER according to CACHE_PTR. */ + +static bfd_boolean +translate_to_native_sym_flags (bfd *abfd, + asymbol *cache_ptr, + struct external_nlist *sym_pointer) +{ + bfd_vma value = cache_ptr->value; + asection *sec; + bfd_vma off; + + /* Mask out any existing type bits in case copying from one section + to another. */ + sym_pointer->e_type[0] &= ~N_TYPE; + + sec = bfd_get_section (cache_ptr); + off = 0; + + if (sec == NULL) + { + /* This case occurs, e.g., for the *DEBUG* section of a COFF + file. */ + (*_bfd_error_handler) + ("%B: can not represent section for symbol `%s' in a.out object file format", + abfd, cache_ptr->name != NULL ? cache_ptr->name : "*unknown*"); + bfd_set_error (bfd_error_nonrepresentable_section); + return FALSE; + } + + if (sec->output_section != NULL) + { + off = sec->output_offset; + sec = sec->output_section; + } + + if (bfd_is_abs_section (sec)) + sym_pointer->e_type[0] |= N_ABS; + else if (sec == obj_textsec (abfd)) + sym_pointer->e_type[0] |= N_TEXT; + else if (sec == obj_datasec (abfd)) + sym_pointer->e_type[0] |= N_DATA; + else if (sec == obj_bsssec (abfd)) + sym_pointer->e_type[0] |= N_BSS; + else if (bfd_is_und_section (sec)) + sym_pointer->e_type[0] = N_UNDF | N_EXT; + else if (bfd_is_com_section (sec)) + sym_pointer->e_type[0] = N_UNDF | N_EXT; + else + { + (*_bfd_error_handler) + ("%B: can not represent section `%A' in a.out object file format", + abfd, sec); + bfd_set_error (bfd_error_nonrepresentable_section); + return FALSE; + } + + /* Turn the symbol from section relative to absolute again */ + value += sec->vma + off; + + if ((cache_ptr->flags & BSF_DEBUGGING) != 0) + sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; + else if ((cache_ptr->flags & BSF_GLOBAL) != 0) + sym_pointer->e_type[0] |= N_EXT; + + PUT_WORD(abfd, value, sym_pointer->e_value); + + return TRUE; +} + +/* Native-level interface to symbols. */ + +asymbol * +NAME (aout, make_empty_symbol) (bfd *abfd) +{ + bfd_size_type amt = sizeof (aout_symbol_type); + aout_symbol_type *new = bfd_zalloc (abfd, amt); + + if (!new) + return NULL; + new->symbol.the_bfd = abfd; + + return &new->symbol; +} + +/* Translate a set of internal symbols into external symbols. */ + +bfd_boolean +NAME (aout, translate_symbol_table) (bfd *abfd, + aout_symbol_type *in, + struct external_nlist *ext, + bfd_size_type count, + char *str, + bfd_size_type strsize, + bfd_boolean dynamic) +{ + struct external_nlist *ext_end; + + ext_end = ext + count; + for (; ext < ext_end; ext++, in++) + { + bfd_vma x; + + x = GET_WORD (abfd, ext->e_strx); + in->symbol.the_bfd = abfd; + + /* For the normal symbols, the zero index points at the number + of bytes in the string table but is to be interpreted as the + null string. For the dynamic symbols, the number of bytes in + the string table is stored in the __DYNAMIC structure and the + zero index points at an actual string. */ + if (x == 0 && ! dynamic) + in->symbol.name = ""; + else if (x < strsize) + in->symbol.name = str + x; + else + return FALSE; + + in->symbol.value = GET_SWORD (abfd, ext->e_value); + /* TODO: is 0 a safe value here? */ + in->desc = 0; + in->other = 0; + in->type = H_GET_8 (abfd, ext->e_type); + in->symbol.udata.p = NULL; + + if (! translate_from_native_sym_flags (abfd, in)) + return FALSE; + + if (dynamic) + in->symbol.flags |= BSF_DYNAMIC; + } + + return TRUE; +} + +/* We read the symbols into a buffer, which is discarded when this + function exits. We read the strings into a buffer large enough to + hold them all plus all the cached symbol entries. */ + +bfd_boolean +NAME (aout, slurp_symbol_table) (bfd *abfd) +{ + struct external_nlist *old_external_syms; + aout_symbol_type *cached; + bfd_size_type cached_size; + + /* If there's no work to be done, don't do any. */ + if (obj_aout_symbols (abfd) != NULL) + return TRUE; + + old_external_syms = obj_aout_external_syms (abfd); + + if (! aout_get_external_symbols (abfd)) + return FALSE; + + cached_size = obj_aout_external_sym_count (abfd); + cached_size *= sizeof (aout_symbol_type); + cached = bfd_zmalloc (cached_size); + if (cached == NULL && cached_size != 0) + return FALSE; + + /* Convert from external symbol information to internal. */ + if (! (NAME (aout, translate_symbol_table) + (abfd, cached, + obj_aout_external_syms (abfd), + obj_aout_external_sym_count (abfd), + obj_aout_external_strings (abfd), + obj_aout_external_string_size (abfd), + FALSE))) + { + free (cached); + return FALSE; + } + + bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); + + obj_aout_symbols (abfd) = cached; + + /* It is very likely that anybody who calls this function will not + want the external symbol information, so if it was allocated + because of our call to aout_get_external_symbols, we free it up + right away to save space. */ + if (old_external_syms == NULL + && obj_aout_external_syms (abfd) != NULL) + { +#ifdef USE_MMAP + bfd_free_window (&obj_aout_sym_window (abfd)); +#else + free (obj_aout_external_syms (abfd)); +#endif + obj_aout_external_syms (abfd) = NULL; + } + + return TRUE; +} + +/* We use a hash table when writing out symbols so that we only write + out a particular string once. This helps particularly when the + linker writes out stabs debugging entries, because each different + contributing object file tends to have many duplicate stabs + strings. + + This hash table code breaks dbx on SunOS 4.1.3, so we don't do it + if BFD_TRADITIONAL_FORMAT is set. */ + +/* Get the index of a string in a strtab, adding it if it is not + already present. */ + +static INLINE bfd_size_type +add_to_stringtab (bfd *abfd, + struct bfd_strtab_hash *tab, + const char *str, + bfd_boolean copy) +{ + bfd_boolean hash; + bfd_size_type index; + + /* An index of 0 always means the empty string. */ + if (str == 0 || *str == '\0') + return 0; + + /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx + doesn't understand a hashed string table. */ + hash = TRUE; + if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) + hash = FALSE; + + index = _bfd_stringtab_add (tab, str, hash, copy); + + if (index != (bfd_size_type) -1) + /* Add BYTES_IN_LONG to the return value to account for the + space taken up by the string table size. */ + index += BYTES_IN_LONG; + + return index; +} + +/* Write out a strtab. ABFD is already at the right location in the + file. */ + +static bfd_boolean +emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab) +{ + bfd_byte buffer[BYTES_IN_LONG]; + + /* The string table starts with the size. */ + H_PUT_32 (abfd, _bfd_stringtab_size (tab) + BYTES_IN_LONG, buffer); + if (bfd_bwrite ((void *) buffer, (bfd_size_type) BYTES_IN_LONG, abfd) + != BYTES_IN_LONG) + return FALSE; + + return _bfd_stringtab_emit (abfd, tab); +} + +bfd_boolean +NAME (aout, write_syms) (bfd *abfd) +{ + unsigned int count ; + asymbol **generic = bfd_get_outsymbols (abfd); + struct bfd_strtab_hash *strtab; + + strtab = _bfd_stringtab_init (); + if (strtab == NULL) + return FALSE; + + for (count = 0; count < bfd_get_symcount (abfd); count++) + { + asymbol *g = generic[count]; + bfd_size_type indx; + struct external_nlist nsp; + + PUT_WORD (abfd, 0, nsp.e_unused); + + indx = add_to_stringtab (abfd, strtab, g->name, FALSE); + if (indx == (bfd_size_type) -1) + goto error_return; + PUT_WORD (abfd, indx, nsp.e_strx); + + if (bfd_asymbol_flavour(g) == abfd->xvec->flavour) + H_PUT_8 (abfd, aout_symbol(g)->type, nsp.e_type); + else + H_PUT_8 (abfd, 0, nsp.e_type); + + if (! translate_to_native_sym_flags (abfd, g, &nsp)) + goto error_return; + + H_PUT_8 (abfd, 0, nsp.e_ovly); + + if (bfd_bwrite ((void *)&nsp, (bfd_size_type) EXTERNAL_NLIST_SIZE, abfd) + != EXTERNAL_NLIST_SIZE) + goto error_return; + + /* NB: `KEEPIT' currently overlays `udata.p', so set this only + here, at the end. */ + g->KEEPIT = count; + } + + if (! emit_stringtab (abfd, strtab)) + goto error_return; + + _bfd_stringtab_free (strtab); + + return TRUE; + +error_return: + _bfd_stringtab_free (strtab); + return FALSE; +} + + +long +NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location) +{ + unsigned int counter = 0; + aout_symbol_type *symbase; + + if (!NAME (aout, slurp_symbol_table) (abfd)) + return -1; + + for (symbase = obj_aout_symbols (abfd); counter++ < bfd_get_symcount (abfd);) + *(location++) = (asymbol *)(symbase++); + *location++ =0; + return bfd_get_symcount (abfd); +} + + +/* Output extended relocation information to a file in target byte order. */ + +static void +pdp11_aout_swap_reloc_out (bfd *abfd, arelent *g, bfd_byte *natptr) +{ + int r_index; + int r_pcrel; + int reloc_entry; + int r_type; + asymbol *sym = *(g->sym_ptr_ptr); + asection *output_section = sym->section->output_section; + + if (g->addend != 0) + fprintf (stderr, "BFD: can't do this reloc addend stuff\n"); + + r_pcrel = g->howto->pc_relative; + + if (bfd_is_abs_section (output_section)) + r_type = RABS; + else if (output_section == obj_textsec (abfd)) + r_type = RTEXT; + else if (output_section == obj_datasec (abfd)) + r_type = RDATA; + else if (output_section == obj_bsssec (abfd)) + r_type = RBSS; + else if (bfd_is_und_section (output_section)) + r_type = REXT; + else if (bfd_is_com_section (output_section)) + r_type = REXT; + else + r_type = -1; + + BFD_ASSERT (r_type != -1); + + if (r_type == RABS) + r_index = 0; + else + r_index = (*(g->sym_ptr_ptr))->KEEPIT; + + reloc_entry = r_index << 4 | r_type | r_pcrel; + + PUT_WORD (abfd, reloc_entry, natptr); +} + +/* BFD deals internally with all things based from the section they're + in. so, something in 10 bytes into a text section with a base of + 50 would have a symbol (.text+10) and know .text vma was 50. + + Aout keeps all it's symbols based from zero, so the symbol would + contain 60. This macro subs the base of each section from the value + to give the true offset from the section */ + + +#define MOVE_ADDRESS(ad) \ + if (r_extern) \ + { \ + /* Undefined symbol. */ \ + cache_ptr->sym_ptr_ptr = symbols + r_index; \ + cache_ptr->addend = ad; \ + } \ + else \ + { \ + /* Defined, section relative. replace symbol with pointer to \ + symbol which points to section. */ \ + switch (r_index) \ + { \ + case N_TEXT: \ + case N_TEXT | N_EXT: \ + cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \ + cache_ptr->addend = ad - su->textsec->vma; \ + break; \ + case N_DATA: \ + case N_DATA | N_EXT: \ + cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \ + cache_ptr->addend = ad - su->datasec->vma; \ + break; \ + case N_BSS: \ + case N_BSS | N_EXT: \ + cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \ + cache_ptr->addend = ad - su->bsssec->vma; \ + break; \ + default: \ + case N_ABS: \ + case N_ABS | N_EXT: \ + cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ + cache_ptr->addend = ad; \ + break; \ + } \ + } + +static void +pdp11_aout_swap_reloc_in (bfd * abfd, + bfd_byte * bytes, + arelent * cache_ptr, + bfd_size_type offset, + asymbol ** symbols, + bfd_size_type symcount) +{ + struct aoutdata *su = &(abfd->tdata.aout_data->a); + unsigned int r_index; + int reloc_entry; + int r_extern; + int r_pcrel; + + reloc_entry = GET_WORD (abfd, (void *) bytes); + + r_pcrel = reloc_entry & RELFLG; + + cache_ptr->address = offset; + cache_ptr->howto = howto_table_pdp11 + (r_pcrel ? 1 : 0); + + if ((reloc_entry & RTYPE) == RABS) + r_index = N_ABS; + else + r_index = RINDEX (reloc_entry); + + /* r_extern reflects whether the symbol the reloc is against is + local or global. */ + r_extern = (reloc_entry & RTYPE) == REXT; + + if (r_extern && r_index > symcount) + { + /* We could arrange to return an error, but it might be useful + to see the file even if it is bad. */ + r_extern = 0; + r_index = N_ABS; + } + + MOVE_ADDRESS(0); +} + +/* Read and swap the relocs for a section. */ + +bfd_boolean +NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols) +{ + bfd_byte *rptr; + bfd_size_type count; + bfd_size_type reloc_size; + void * relocs; + arelent *reloc_cache; + size_t each_size; + unsigned int counter = 0; + arelent *cache_ptr; + + if (asect->relocation) + return TRUE; + + if (asect->flags & SEC_CONSTRUCTOR) + return TRUE; + + if (asect == obj_datasec (abfd)) + reloc_size = exec_hdr(abfd)->a_drsize; + else if (asect == obj_textsec (abfd)) + reloc_size = exec_hdr(abfd)->a_trsize; + else if (asect == obj_bsssec (abfd)) + reloc_size = 0; + else + { + bfd_set_error (bfd_error_invalid_operation); + return FALSE; + } + + if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) + return FALSE; + + each_size = obj_reloc_entry_size (abfd); + + relocs = bfd_malloc (reloc_size); + if (relocs == NULL && reloc_size != 0) + return FALSE; + + if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) + { + free (relocs); + return FALSE; + } + + count = reloc_size / each_size; + + /* Count the number of NON-ZERO relocs, this is the count we want. */ + { + unsigned int real_count = 0; + + for (counter = 0; counter < count; counter++) + { + int x; + + x = GET_WORD (abfd, (char *) relocs + each_size * counter); + if (x != 0) + real_count++; + } + + count = real_count; + } + + reloc_cache = bfd_zmalloc (count * sizeof (arelent)); + if (reloc_cache == NULL && count != 0) + return FALSE; + + cache_ptr = reloc_cache; + + rptr = relocs; + for (counter = 0; + counter < count; + counter++, rptr += RELOC_SIZE, cache_ptr++) + { + while (GET_WORD (abfd, (void *) rptr) == 0) + { + rptr += RELOC_SIZE; + if ((char *) rptr >= (char *) relocs + reloc_size) + goto done; + } + + pdp11_aout_swap_reloc_in (abfd, rptr, cache_ptr, + (bfd_size_type) ((char *) rptr - (char *) relocs), + symbols, + (bfd_size_type) bfd_get_symcount (abfd)); + } + done: + /* Just in case, if rptr >= relocs + reloc_size should happen + too early. */ + BFD_ASSERT (counter == count); + + free (relocs); + + asect->relocation = reloc_cache; + asect->reloc_count = cache_ptr - reloc_cache; + + return TRUE; +} + +/* Write out a relocation section into an object file. */ + +bfd_boolean +NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section) +{ + arelent **generic; + unsigned char *native; + unsigned int count = section->reloc_count; + bfd_size_type natsize; + + natsize = section->size; + native = bfd_zalloc (abfd, natsize); + if (!native) + return FALSE; + + generic = section->orelocation; + if (generic != NULL) + { + while (count > 0) + { + bfd_byte *r; + + r = native + (*generic)->address; + pdp11_aout_swap_reloc_out (abfd, *generic, r); + count--; + generic++; + } + } + + if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) + { + bfd_release (abfd, native); + return FALSE; + } + + bfd_release (abfd, native); + return TRUE; +} + +/* This is stupid. This function should be a boolean predicate. */ + +long +NAME (aout, canonicalize_reloc) (bfd *abfd, + sec_ptr section, + arelent **relptr, + asymbol **symbols) +{ + arelent *tblptr = section->relocation; + unsigned int count; + + if (section == obj_bsssec (abfd)) + { + *relptr = NULL; + return 0; + } + + if (!(tblptr || NAME (aout, slurp_reloc_table)(abfd, section, symbols))) + return -1; + + if (section->flags & SEC_CONSTRUCTOR) + { + arelent_chain *chain = section->constructor_chain; + + for (count = 0; count < section->reloc_count; count ++) + { + *relptr ++ = &chain->relent; + chain = chain->next; + } + } + else + { + tblptr = section->relocation; + + for (count = 0; count++ < section->reloc_count;) + *relptr++ = tblptr++; + } + + *relptr = 0; + + return section->reloc_count; +} + +long +NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect) +{ + if (bfd_get_format (abfd) != bfd_object) + { + bfd_set_error (bfd_error_invalid_operation); + return -1; + } + + if (asect->flags & SEC_CONSTRUCTOR) + return (sizeof (arelent *) * (asect->reloc_count + 1)); + + if (asect == obj_datasec (abfd)) + return (sizeof (arelent *) + * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd)) + + 1)); + + if (asect == obj_textsec (abfd)) + return (sizeof (arelent *) + * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd)) + + 1)); + + /* TODO: why are there two if statements for obj_bsssec()? */ + + if (asect == obj_bsssec (abfd)) + return sizeof (arelent *); + + if (asect == obj_bsssec (abfd)) + return 0; + + bfd_set_error (bfd_error_invalid_operation); + return -1; +} + + +long +NAME (aout, get_symtab_upper_bound) (bfd *abfd) +{ + if (!NAME (aout, slurp_symbol_table) (abfd)) + return -1; + + return (bfd_get_symcount (abfd) + 1) * (sizeof (aout_symbol_type *)); +} + +alent * +NAME (aout, get_lineno) (bfd * abfd ATTRIBUTE_UNUSED, + asymbol * symbol ATTRIBUTE_UNUSED) +{ + return NULL; +} + +void +NAME (aout, get_symbol_info) (bfd * abfd ATTRIBUTE_UNUSED, + asymbol *symbol, + symbol_info *ret) +{ + bfd_symbol_info (symbol, ret); + + if (ret->type == '?') + { + int type_code = aout_symbol(symbol)->type & 0xff; + const char *stab_name = bfd_get_stab_name (type_code); + static char buf[10]; + + if (stab_name == NULL) + { + sprintf(buf, "(%d)", type_code); + stab_name = buf; + } + ret->type = '-'; + ret->stab_type = type_code; + ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff); + ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff); + ret->stab_name = stab_name; + } +} + +void +NAME (aout, print_symbol) (bfd * abfd, + void * afile, + asymbol *symbol, + bfd_print_symbol_type how) +{ + FILE *file = (FILE *) afile; + + switch (how) + { + case bfd_print_symbol_name: + if (symbol->name) + fprintf(file,"%s", symbol->name); + break; + case bfd_print_symbol_more: + fprintf(file,"%4x %2x %2x", + (unsigned) (aout_symbol (symbol)->desc & 0xffff), + (unsigned) (aout_symbol (symbol)->other & 0xff), + (unsigned) (aout_symbol (symbol)->type)); + break; + case bfd_print_symbol_all: + { + const char *section_name = symbol->section->name; + + bfd_print_symbol_vandf (abfd, (void *) file, symbol); + + fprintf (file," %-5s %04x %02x %02x", + section_name, + (unsigned) (aout_symbol (symbol)->desc & 0xffff), + (unsigned) (aout_symbol (symbol)->other & 0xff), + (unsigned) (aout_symbol (symbol)->type & 0xff)); + if (symbol->name) + fprintf(file," %s", symbol->name); + } + break; + } +} + +/* If we don't have to allocate more than 1MB to hold the generic + symbols, we use the generic minisymbol method: it's faster, since + it only translates the symbols once, not multiple times. */ +#define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) + +/* Read minisymbols. For minisymbols, we use the unmodified a.out + symbols. The minisymbol_to_symbol function translates these into + BFD asymbol structures. */ + +long +NAME (aout, read_minisymbols) (bfd *abfd, + bfd_boolean dynamic, + void * *minisymsp, + unsigned int *sizep) +{ + if (dynamic) + /* We could handle the dynamic symbols here as well, but it's + easier to hand them off. */ + return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); + + if (! aout_get_external_symbols (abfd)) + return -1; + + if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) + return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); + + *minisymsp = (void *) obj_aout_external_syms (abfd); + + /* By passing the external symbols back from this routine, we are + giving up control over the memory block. Clear + obj_aout_external_syms, so that we do not try to free it + ourselves. */ + obj_aout_external_syms (abfd) = NULL; + + *sizep = EXTERNAL_NLIST_SIZE; + return obj_aout_external_sym_count (abfd); +} + +/* Convert a minisymbol to a BFD asymbol. A minisymbol is just an + unmodified a.out symbol. The SYM argument is a structure returned + by bfd_make_empty_symbol, which we fill in here. */ + +asymbol * +NAME (aout, minisymbol_to_symbol) (bfd *abfd, + bfd_boolean dynamic, + const void * minisym, + asymbol *sym) +{ + if (dynamic + || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) + return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); + + memset (sym, 0, sizeof (aout_symbol_type)); + + /* We call translate_symbol_table to translate a single symbol. */ + if (! (NAME (aout, translate_symbol_table) + (abfd, + (aout_symbol_type *) sym, + (struct external_nlist *) minisym, + (bfd_size_type) 1, + obj_aout_external_strings (abfd), + obj_aout_external_string_size (abfd), + FALSE))) + return NULL; + + return sym; +} + +/* Provided a BFD, a section and an offset into the section, calculate + and return the name of the source file and the line nearest to the + wanted location. */ + +bfd_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) +{ + /* Run down the file looking for the filename, function and linenumber. */ + asymbol **p; + const char *directory_name = NULL; + const char *main_file_name = NULL; + const char *current_file_name = NULL; + const char *line_file_name = NULL; /* Value of current_file_name at line number. */ + bfd_vma low_line_vma = 0; + bfd_vma low_func_vma = 0; + asymbol *func = 0; + size_t filelen, funclen; + char *buf; + + *filename_ptr = abfd->filename; + *functionname_ptr = 0; + *line_ptr = 0; + + if (symbols != NULL) + { + for (p = symbols; *p; p++) + { + aout_symbol_type *q = (aout_symbol_type *)(*p); + next: + switch (q->type) + { + case N_TEXT: + /* If this looks like a file name symbol, and it comes after + the line number we have found so far, but before the + offset, then we have probably not found the right line + number. */ + if (q->symbol.value <= offset + && ((q->symbol.value > low_line_vma + && (line_file_name != NULL + || *line_ptr != 0)) + || (q->symbol.value > low_func_vma + && func != NULL))) + { + const char * symname; + + symname = q->symbol.name; + if (strcmp (symname + strlen (symname) - 2, ".o") == 0) + { + if (q->symbol.value > low_line_vma) + { + *line_ptr = 0; + line_file_name = NULL; + } + if (q->symbol.value > low_func_vma) + func = NULL; + } + } + break; + + case N_SO: + /* If this symbol is less than the offset, but greater than + the line number we have found so far, then we have not + found the right line number. */ + if (q->symbol.value <= offset) + { + if (q->symbol.value > low_line_vma) + { + *line_ptr = 0; + line_file_name = NULL; + } + if (q->symbol.value > low_func_vma) + func = NULL; + } + + main_file_name = current_file_name = q->symbol.name; + /* Look ahead to next symbol to check if that too is an N_SO. */ + p++; + if (*p == NULL) + break; + q = (aout_symbol_type *)(*p); + if (q->type != (int) N_SO) + goto next; + + /* Found a second N_SO First is directory; second is filename. */ + directory_name = current_file_name; + main_file_name = current_file_name = q->symbol.name; + if (obj_textsec(abfd) != section) + goto done; + break; + case N_SOL: + current_file_name = q->symbol.name; + break; + + case N_SLINE: + case N_DSLINE: + case N_BSLINE: + /* We'll keep this if it resolves nearer than the one we have + already. */ + if (q->symbol.value >= low_line_vma + && q->symbol.value <= offset) + { + *line_ptr = q->desc; + low_line_vma = q->symbol.value; + line_file_name = current_file_name; + } + break; + + case N_FUN: + { + /* We'll keep this if it is nearer than the one we have already. */ + if (q->symbol.value >= low_func_vma && + q->symbol.value <= offset) + { + low_func_vma = q->symbol.value; + func = (asymbol *) q; + } + else if (q->symbol.value > offset) + goto done; + } + break; + } + } + } + + done: + if (*line_ptr != 0) + main_file_name = line_file_name; + + if (main_file_name == NULL + || main_file_name[0] == '/' + || directory_name == NULL) + filelen = 0; + else + filelen = strlen (directory_name) + strlen (main_file_name); + if (func == NULL) + funclen = 0; + else + funclen = strlen (bfd_asymbol_name (func)); + + if (adata (abfd).line_buf != NULL) + free (adata (abfd).line_buf); + if (filelen + funclen == 0) + adata (abfd).line_buf = buf = NULL; + else + { + buf = bfd_malloc ((bfd_size_type) filelen + funclen + 3); + adata (abfd).line_buf = buf; + if (buf == NULL) + return FALSE; + } + + if (main_file_name != NULL) + { + if (main_file_name[0] == '/' || directory_name == NULL) + *filename_ptr = main_file_name; + else + { + sprintf (buf, "%s%s", directory_name, main_file_name); + *filename_ptr = buf; + buf += filelen + 1; + } + } + + if (func) + { + const char *function = func->name; + char *colon; + + /* The caller expects a symbol name. We actually have a + function name, without the leading underscore. Put the + underscore back in, so that the caller gets a symbol name. */ + if (bfd_get_symbol_leading_char (abfd) == '\0') + strcpy (buf, function); + else + { + buf[0] = bfd_get_symbol_leading_char (abfd); + strcpy (buf + 1, function); + } + + /* Have to remove : stuff. */ + colon = strchr (buf, ':'); + if (colon != NULL) + *colon = '\0'; + *functionname_ptr = buf; + } + + return TRUE; +} + +int +NAME (aout, sizeof_headers) (bfd *abfd, + struct bfd_link_info *info ATTRIBUTE_UNUSED) +{ + return adata (abfd).exec_bytes_size; +} + +/* Free all information we have cached for this BFD. We can always + read it again later if we need it. */ + +bfd_boolean +NAME (aout, bfd_free_cached_info) (bfd *abfd) +{ + asection *o; + + if (bfd_get_format (abfd) != bfd_object) + return TRUE; + +#define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } + BFCI_FREE (obj_aout_symbols (abfd)); + +#ifdef USE_MMAP + obj_aout_external_syms (abfd) = 0; + bfd_free_window (&obj_aout_sym_window (abfd)); + bfd_free_window (&obj_aout_string_window (abfd)); + obj_aout_external_strings (abfd) = 0; +#else + BFCI_FREE (obj_aout_external_syms (abfd)); + BFCI_FREE (obj_aout_external_strings (abfd)); +#endif + for (o = abfd->sections; o != NULL; o = o->next) + BFCI_FREE (o->relocation); +#undef BFCI_FREE + + return TRUE; +} + +/* Routine to create an entry in an a.out link hash table. */ + +struct bfd_hash_entry * +NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == NULL) + ret = bfd_hash_allocate (table, sizeof (* ret)); + if (ret == NULL) + return NULL; + + /* Call the allocation method of the superclass. */ + ret = (struct aout_link_hash_entry *) + _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); + if (ret) + { + /* Set local fields. */ + ret->written = FALSE; + ret->indx = -1; + } + + return (struct bfd_hash_entry *) ret; +} + +/* Initialize an a.out link hash table. */ + +bfd_boolean +NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table, + bfd *abfd, + struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, + struct bfd_hash_table *, + const char *), + unsigned int entsize) +{ + return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); +} + +/* Create an a.out link hash table. */ + +struct bfd_link_hash_table * +NAME (aout, link_hash_table_create) (bfd *abfd) +{ + struct aout_link_hash_table *ret; + bfd_size_type amt = sizeof (struct aout_link_hash_table); + + ret = bfd_alloc (abfd, amt); + if (ret == NULL) + return NULL; + if (! NAME (aout, link_hash_table_init) (ret, abfd, + NAME (aout, link_hash_newfunc), + sizeof (struct aout_link_hash_entry))) + { + free (ret); + return NULL; + } + return &ret->root; +} + +/* Free up the internal symbols read from an a.out file. */ + +static bfd_boolean +aout_link_free_symbols (bfd *abfd) +{ + if (obj_aout_external_syms (abfd) != NULL) + { +#ifdef USE_MMAP + bfd_free_window (&obj_aout_sym_window (abfd)); +#else + free ((void *) obj_aout_external_syms (abfd)); +#endif + obj_aout_external_syms (abfd) = NULL; + } + + if (obj_aout_external_strings (abfd) != NULL) + { +#ifdef USE_MMAP + bfd_free_window (&obj_aout_string_window (abfd)); +#else + free ((void *) obj_aout_external_strings (abfd)); +#endif + obj_aout_external_strings (abfd) = NULL; + } + return TRUE; +} + +/* Given an a.out BFD, add symbols to the global hash table as + appropriate. */ + +bfd_boolean +NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info) +{ + switch (bfd_get_format (abfd)) + { + case bfd_object: + return aout_link_add_object_symbols (abfd, info); + case bfd_archive: + return _bfd_generic_link_add_archive_symbols + (abfd, info, aout_link_check_archive_element); + default: + bfd_set_error (bfd_error_wrong_format); + return FALSE; + } +} + +/* Add symbols from an a.out object file. */ + +static bfd_boolean +aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) +{ + if (! aout_get_external_symbols (abfd)) + return FALSE; + if (! aout_link_add_symbols (abfd, info)) + return FALSE; + if (! info->keep_memory) + { + if (! aout_link_free_symbols (abfd)) + return FALSE; + } + return TRUE; +} + +/* Look through the internal symbols to see if this object file should + be included in the link. We should include this object file if it + defines any symbols which are currently undefined. If this object + file defines a common symbol, then we may adjust the size of the + known symbol but we do not include the object file in the link + (unless there is some other reason to include it). */ + +static bfd_boolean +aout_link_check_ar_symbols (bfd *abfd, + struct bfd_link_info *info, + bfd_boolean *pneeded) +{ + struct external_nlist *p; + struct external_nlist *pend; + char *strings; + + *pneeded = FALSE; + + /* Look through all the symbols. */ + p = obj_aout_external_syms (abfd); + pend = p + obj_aout_external_sym_count (abfd); + strings = obj_aout_external_strings (abfd); + for (; p < pend; p++) + { + int type = H_GET_8 (abfd, p->e_type); + const char *name; + struct bfd_link_hash_entry *h; + + /* Ignore symbols that are not externally visible. This is an + optimization only, as we check the type more thoroughly + below. */ + if ((type & N_EXT) == 0 + || type == N_FN) + continue; + + name = strings + GET_WORD (abfd, p->e_strx); + h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); + + /* We are only interested in symbols that are currently + undefined or common. */ + if (h == NULL + || (h->type != bfd_link_hash_undefined + && h->type != bfd_link_hash_common)) + continue; + + if (type == (N_TEXT | N_EXT) + || type == (N_DATA | N_EXT) + || type == (N_BSS | N_EXT) + || type == (N_ABS | N_EXT)) + { + /* This object file defines this symbol. We must link it + in. This is true regardless of whether the current + definition of the symbol is undefined or common. If the + current definition is common, we have a case in which we + have already seen an object file including + int a; + and this object file from the archive includes + int a = 5; + In such a case we must include this object file. + + FIXME: The SunOS 4.1.3 linker will pull in the archive + element if the symbol is defined in the .data section, + but not if it is defined in the .text section. That + seems a bit crazy to me, and I haven't implemented it. + However, it might be correct. */ + if (! (*info->callbacks->add_archive_element) (info, abfd, name)) + return FALSE; + *pneeded = TRUE; + return TRUE; + } + + if (type == (N_UNDF | N_EXT)) + { + bfd_vma value; + + value = GET_WORD (abfd, p->e_value); + if (value != 0) + { + /* This symbol is common in the object from the archive + file. */ + if (h->type == bfd_link_hash_undefined) + { + bfd *symbfd; + unsigned int power; + + symbfd = h->u.undef.abfd; + if (symbfd == NULL) + { + /* This symbol was created as undefined from + outside BFD. We assume that we should link + in the object file. This is done for the -u + option in the linker. */ + if (! (*info->callbacks->add_archive_element) + (info, abfd, name)) + return FALSE; + *pneeded = TRUE; + return TRUE; + } + /* Turn the current link symbol into a common + symbol. It is already on the undefs list. */ + h->type = bfd_link_hash_common; + h->u.c.p = bfd_hash_allocate (&info->hash->table, + sizeof (struct bfd_link_hash_common_entry)); + if (h->u.c.p == NULL) + return FALSE; + + h->u.c.size = value; + + /* FIXME: This isn't quite right. The maximum + alignment of a common symbol should be set by the + architecture of the output file, not of the input + file. */ + power = bfd_log2 (value); + if (power > bfd_get_arch_info (abfd)->section_align_power) + power = bfd_get_arch_info (abfd)->section_align_power; + h->u.c.p->alignment_power = power; + + h->u.c.p->section = bfd_make_section_old_way (symbfd, + "COMMON"); + } + else + { + /* Adjust the size of the common symbol if + necessary. */ + if (value > h->u.c.size) + h->u.c.size = value; + } + } + } + } + + /* We do not need this object file. */ + return TRUE; +} + +/* Check a single archive element to see if we need to include it in + the link. *PNEEDED is set according to whether this element is + needed in the link or not. This is called from + _bfd_generic_link_add_archive_symbols. */ + +static bfd_boolean +aout_link_check_archive_element (bfd *abfd, + struct bfd_link_info *info, + bfd_boolean *pneeded) +{ + if (! aout_get_external_symbols (abfd)) + return FALSE; + + if (! aout_link_check_ar_symbols (abfd, info, pneeded)) + return FALSE; + + if (*pneeded) + { + if (! aout_link_add_symbols (abfd, info)) + return FALSE; + } + + if (! info->keep_memory || ! *pneeded) + { + if (! aout_link_free_symbols (abfd)) + return FALSE; + } + + return TRUE; +} + +/* Add all symbols from an object file to the hash table. */ + +static bfd_boolean +aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info) +{ + bfd_boolean (*add_one_symbol) + (struct bfd_link_info *, bfd *, const char *, flagword, asection *, + bfd_vma, const char *, bfd_boolean, bfd_boolean, + struct bfd_link_hash_entry **); + struct external_nlist *syms; + bfd_size_type sym_count; + char *strings; + bfd_boolean copy; + struct aout_link_hash_entry **sym_hash; + struct external_nlist *p; + struct external_nlist *pend; + + syms = obj_aout_external_syms (abfd); + sym_count = obj_aout_external_sym_count (abfd); + strings = obj_aout_external_strings (abfd); + if (info->keep_memory) + copy = FALSE; + else + copy = TRUE; + + if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) + { + if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) + (abfd, info, &syms, &sym_count, &strings))) + return FALSE; + } + + /* We keep a list of the linker hash table entries that correspond + to particular symbols. We could just look them up in the hash + table, but keeping the list is more efficient. Perhaps this + should be conditional on info->keep_memory. */ + sym_hash = bfd_alloc (abfd, + sym_count * sizeof (struct aout_link_hash_entry *)); + if (sym_hash == NULL && sym_count != 0) + return FALSE; + obj_aout_sym_hashes (abfd) = sym_hash; + + add_one_symbol = aout_backend_info (abfd)->add_one_symbol; + if (add_one_symbol == NULL) + add_one_symbol = _bfd_generic_link_add_one_symbol; + + p = syms; + pend = p + sym_count; + for (; p < pend; p++, sym_hash++) + { + int type; + const char *name; + bfd_vma value; + asection *section; + flagword flags; + const char *string; + + *sym_hash = NULL; + + type = H_GET_8 (abfd, p->e_type); + + name = strings + GET_WORD (abfd, p->e_strx); + value = GET_WORD (abfd, p->e_value); + flags = BSF_GLOBAL; + string = NULL; + switch (type) + { + default: + abort (); + + case N_UNDF: + case N_ABS: + case N_TEXT: + case N_DATA: + case N_BSS: + case N_REG: + case N_FN: + /* Ignore symbols that are not externally visible. */ + continue; + + case N_UNDF | N_EXT: + if (value == 0) + { + section = bfd_und_section_ptr; + flags = 0; + } + else + section = bfd_com_section_ptr; + break; + case N_ABS | N_EXT: + section = bfd_abs_section_ptr; + break; + case N_TEXT | N_EXT: + section = obj_textsec (abfd); + value -= bfd_get_section_vma (abfd, section); + break; + case N_DATA | N_EXT: + /* Treat N_SETV symbols as N_DATA symbol; see comment in + translate_from_native_sym_flags. */ + section = obj_datasec (abfd); + value -= bfd_get_section_vma (abfd, section); + break; + case N_BSS | N_EXT: + section = obj_bsssec (abfd); + value -= bfd_get_section_vma (abfd, section); + break; + } + + if (! ((*add_one_symbol) + (info, abfd, name, flags, section, value, string, copy, FALSE, + (struct bfd_link_hash_entry **) sym_hash))) + return FALSE; + + /* Restrict the maximum alignment of a common symbol based on + the architecture, since a.out has no way to represent + alignment requirements of a section in a .o file. FIXME: + This isn't quite right: it should use the architecture of the + output file, not the input files. */ + if ((*sym_hash)->root.type == bfd_link_hash_common + && ((*sym_hash)->root.u.c.p->alignment_power > + bfd_get_arch_info (abfd)->section_align_power)) + (*sym_hash)->root.u.c.p->alignment_power = + bfd_get_arch_info (abfd)->section_align_power; + + /* If this is a set symbol, and we are not building sets, then + it is possible for the hash entry to not have been set. In + such a case, treat the symbol as not globally defined. */ + if ((*sym_hash)->root.type == bfd_link_hash_new) + { + BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); + *sym_hash = NULL; + } + } + + return TRUE; +} + +/* Look up an entry in an the header file hash table. */ + +#define aout_link_includes_lookup(table, string, create, copy) \ + ((struct aout_link_includes_entry *) \ + bfd_hash_lookup (&(table)->root, (string), (create), (copy))) + +/* The function to create a new entry in the header file hash table. */ + +static struct bfd_hash_entry * +aout_link_includes_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + struct aout_link_includes_entry * ret = + (struct aout_link_includes_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == NULL) + ret = bfd_hash_allocate (table, + sizeof (struct aout_link_includes_entry)); + if (ret == NULL) + return NULL; + + /* Call the allocation method of the superclass. */ + ret = ((struct aout_link_includes_entry *) + bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); + if (ret) + /* Set local fields. */ + ret->totals = NULL; + + return (struct bfd_hash_entry *) ret; +} + +static bfd_boolean +aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data) +{ + struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; + bfd *output_bfd; + int type; + bfd_vma val; + struct external_nlist outsym; + bfd_size_type indx; + bfd_size_type amt; + + if (h->root.type == bfd_link_hash_warning) + { + h = (struct aout_link_hash_entry *) h->root.u.i.link; + if (h->root.type == bfd_link_hash_new) + return TRUE; + } + + output_bfd = finfo->output_bfd; + + if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) + { + if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) + (output_bfd, finfo->info, h))) + { + /* FIXME: No way to handle errors. */ + abort (); + } + } + + if (h->written) + return TRUE; + + h->written = TRUE; + + /* An indx of -2 means the symbol must be written. */ + if (h->indx != -2 + && (finfo->info->strip == strip_all + || (finfo->info->strip == strip_some + && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, + FALSE, FALSE) == NULL))) + return TRUE; + + switch (h->root.type) + { + default: + abort (); + /* Avoid variable not initialized warnings. */ + return TRUE; + case bfd_link_hash_new: + /* This can happen for set symbols when sets are not being + built. */ + return TRUE; + case bfd_link_hash_undefined: + type = N_UNDF | N_EXT; + val = 0; + break; + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + { + asection *sec; + + sec = h->root.u.def.section->output_section; + BFD_ASSERT (bfd_is_abs_section (sec) + || sec->owner == output_bfd); + if (sec == obj_textsec (output_bfd)) + type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; + else if (sec == obj_datasec (output_bfd)) + type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; + else if (sec == obj_bsssec (output_bfd)) + type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; + else + type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; + type |= N_EXT; + val = (h->root.u.def.value + + sec->vma + + h->root.u.def.section->output_offset); + } + break; + case bfd_link_hash_common: + type = N_UNDF | N_EXT; + val = h->root.u.c.size; + break; + case bfd_link_hash_undefweak: + type = N_WEAKU; + val = 0; + case bfd_link_hash_indirect: + case bfd_link_hash_warning: + /* FIXME: Ignore these for now. The circumstances under which + they should be written out are not clear to me. */ + return TRUE; + } + + H_PUT_8 (output_bfd, type, outsym.e_type); + indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, + FALSE); + if (indx == (bfd_size_type) -1) + /* FIXME: No way to handle errors. */ + abort (); + + PUT_WORD (output_bfd, indx, outsym.e_strx); + PUT_WORD (output_bfd, val, outsym.e_value); + + amt = EXTERNAL_NLIST_SIZE; + if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 + || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt) + /* FIXME: No way to handle errors. */ + abort (); + + finfo->symoff += amt; + h->indx = obj_aout_external_sym_count (output_bfd); + ++obj_aout_external_sym_count (output_bfd); + + return TRUE; +} + +/* Handle a link order which is supposed to generate a reloc. */ + +static bfd_boolean +aout_link_reloc_link_order (struct aout_final_link_info *finfo, + asection *o, + struct bfd_link_order *p) +{ + struct bfd_link_order_reloc *pr; + int r_index; + int r_extern; + reloc_howto_type *howto; + file_ptr *reloff_ptr; + struct reloc_std_external srel; + void * rel_ptr; + bfd_size_type rel_size; + + pr = p->u.reloc.p; + + if (p->type == bfd_section_reloc_link_order) + { + r_extern = 0; + if (bfd_is_abs_section (pr->u.section)) + r_index = N_ABS | N_EXT; + else + { + BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); + r_index = pr->u.section->target_index; + } + } + else + { + struct aout_link_hash_entry *h; + + BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); + r_extern = 1; + h = ((struct aout_link_hash_entry *) + bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, + pr->u.name, FALSE, FALSE, TRUE)); + if (h != NULL + && h->indx >= 0) + r_index = h->indx; + else if (h != NULL) + { + /* We decided to strip this symbol, but it turns out that we + can't. Note that we lose the other and desc information + here. I don't think that will ever matter for a global + symbol. */ + h->indx = -2; + h->written = FALSE; + if (! aout_link_write_other_symbol (h, (void *) finfo)) + return FALSE; + r_index = h->indx; + } + else + { + if (! ((*finfo->info->callbacks->unattached_reloc) + (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0))) + return FALSE; + r_index = 0; + } + } + + howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); + if (howto == 0) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + if (o == obj_textsec (finfo->output_bfd)) + reloff_ptr = &finfo->treloff; + else if (o == obj_datasec (finfo->output_bfd)) + reloff_ptr = &finfo->dreloff; + else + abort (); + +#ifdef MY_put_reloc + MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto, + &srel); +#else + { + int r_pcrel; + int r_baserel; + int r_jmptable; + int r_relative; + int r_length; + + fprintf (stderr, "TODO: line %d in bfd/pdp11.c\n", __LINE__); + + r_pcrel = howto->pc_relative; + r_baserel = (howto->type & 8) != 0; + r_jmptable = (howto->type & 16) != 0; + r_relative = (howto->type & 32) != 0; + r_length = howto->size; + + PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); + if (bfd_header_big_endian (finfo->output_bfd)) + { + srel.r_index[0] = r_index >> 16; + srel.r_index[1] = r_index >> 8; + srel.r_index[2] = r_index; + srel.r_type[0] = + ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) + | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) + | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) + | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) + | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); + } + else + { + srel.r_index[2] = r_index >> 16; + srel.r_index[1] = r_index >> 8; + srel.r_index[0] = r_index; + srel.r_type[0] = + ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) + | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) + | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) + | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) + | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); + } + } +#endif + rel_ptr = (void *) &srel; + + /* We have to write the addend into the object file, since + standard a.out relocs are in place. It would be more + reliable if we had the current contents of the file here, + rather than assuming zeroes, but we can't read the file since + it was opened using bfd_openw. */ + if (pr->addend != 0) + { + bfd_size_type size; + bfd_reloc_status_type r; + bfd_byte *buf; + bfd_boolean ok; + + size = bfd_get_reloc_size (howto); + buf = bfd_zmalloc (size); + if (buf == NULL) + return FALSE; + r = MY_relocate_contents (howto, finfo->output_bfd, + pr->addend, buf); + switch (r) + { + case bfd_reloc_ok: + break; + default: + case bfd_reloc_outofrange: + abort (); + case bfd_reloc_overflow: + if (! ((*finfo->info->callbacks->reloc_overflow) + (finfo->info, NULL, + (p->type == bfd_section_reloc_link_order + ? bfd_section_name (finfo->output_bfd, + pr->u.section) + : pr->u.name), + howto->name, pr->addend, NULL, + (asection *) NULL, (bfd_vma) 0))) + { + free (buf); + return FALSE; + } + break; + } + ok = bfd_set_section_contents (finfo->output_bfd, o, + (void *) buf, + (file_ptr) p->offset, + size); + free (buf); + if (! ok) + return FALSE; + } + + rel_size = obj_reloc_entry_size (finfo->output_bfd); + if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 + || bfd_bwrite (rel_ptr, rel_size, finfo->output_bfd) != rel_size) + return FALSE; + + *reloff_ptr += rel_size; + + /* Assert that the relocs have not run into the symbols, and that n + the text relocs have not run into the data relocs. */ + BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) + && (reloff_ptr != &finfo->treloff + || (*reloff_ptr + <= obj_datasec (finfo->output_bfd)->rel_filepos))); + + return TRUE; +} + +/* Get the section corresponding to a reloc index. */ + +static inline asection * +aout_reloc_type_to_section (bfd *abfd, int type) +{ + switch (type) + { + case RTEXT: return obj_textsec (abfd); + case RDATA: return obj_datasec (abfd); + case RBSS: return obj_bsssec (abfd); + case RABS: return bfd_abs_section_ptr; + case REXT: return bfd_und_section_ptr; + default: abort (); + } +} + +static bfd_boolean +pdp11_aout_link_input_section (struct aout_final_link_info *finfo, + bfd *input_bfd, + asection *input_section, + bfd_byte *relocs, + bfd_size_type rel_size, + bfd_byte *contents) +{ + bfd_boolean (*check_dynamic_reloc) + (struct bfd_link_info *, bfd *, asection *, + struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, + bfd_vma *); + bfd *output_bfd; + bfd_boolean relocatable; + struct external_nlist *syms; + char *strings; + struct aout_link_hash_entry **sym_hashes; + int *symbol_map; + bfd_size_type reloc_count; + bfd_byte *rel; + bfd_byte *rel_end; + + output_bfd = finfo->output_bfd; + check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; + + BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_SIZE); + BFD_ASSERT (input_bfd->xvec->header_byteorder + == output_bfd->xvec->header_byteorder); + + relocatable = finfo->info->relocatable; + syms = obj_aout_external_syms (input_bfd); + strings = obj_aout_external_strings (input_bfd); + sym_hashes = obj_aout_sym_hashes (input_bfd); + symbol_map = finfo->symbol_map; + + reloc_count = rel_size / RELOC_SIZE; + rel = relocs; + rel_end = rel + rel_size; + for (; rel < rel_end; rel += RELOC_SIZE) + { + bfd_vma r_addr; + int r_index; + int r_type; + int r_pcrel; + int r_extern; + reloc_howto_type *howto; + struct aout_link_hash_entry *h = NULL; + bfd_vma relocation; + bfd_reloc_status_type r; + int reloc_entry; + + reloc_entry = GET_WORD (input_bfd, (void *) rel); + if (reloc_entry == 0) + continue; + + { + unsigned int howto_idx; + + r_index = (reloc_entry & RIDXMASK) >> 4; + r_type = reloc_entry & RTYPE; + r_pcrel = reloc_entry & RELFLG; + r_addr = (char *) rel - (char *) relocs; + + r_extern = (r_type == REXT); + + howto_idx = r_pcrel; + BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_pdp11)); + howto = howto_table_pdp11 + howto_idx; + } + + if (relocatable) + { + /* We are generating a relocatable output file, and must + modify the reloc accordingly. */ + if (r_extern) + { + /* If we know the symbol this relocation is against, + convert it into a relocation against a section. This + is what the native linker does. */ + h = sym_hashes[r_index]; + if (h != NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + asection *output_section; + + /* Compute a new r_index. */ + output_section = h->root.u.def.section->output_section; + if (output_section == obj_textsec (output_bfd)) + r_type = N_TEXT; + else if (output_section == obj_datasec (output_bfd)) + r_type = N_DATA; + else if (output_section == obj_bsssec (output_bfd)) + r_type = N_BSS; + else + r_type = N_ABS; + + /* Add the symbol value and the section VMA to the + addend stored in the contents. */ + relocation = (h->root.u.def.value + + output_section->vma + + h->root.u.def.section->output_offset); + } + else + { + /* We must change r_index according to the symbol + map. */ + r_index = symbol_map[r_index]; + + if (r_index == -1) + { + if (h != NULL) + { + /* We decided to strip this symbol, but it + turns out that we can't. Note that we + lose the other and desc information here. + I don't think that will ever matter for a + global symbol. */ + if (h->indx < 0) + { + h->indx = -2; + h->written = FALSE; + if (! aout_link_write_other_symbol (h, + (void *) finfo)) + return FALSE; + } + r_index = h->indx; + } + else + { + const char *name; + + name = strings + GET_WORD (input_bfd, + syms[r_index].e_strx); + if (! ((*finfo->info->callbacks->unattached_reloc) + (finfo->info, name, input_bfd, input_section, + r_addr))) + return FALSE; + r_index = 0; + } + } + + relocation = 0; + } + + /* Write out the new r_index value. */ + reloc_entry = GET_WORD (input_bfd, rel); + reloc_entry &= RIDXMASK; + reloc_entry |= r_index << 4; + PUT_WORD (input_bfd, reloc_entry, rel); + } + else + { + asection *section; + + /* This is a relocation against a section. We must + adjust by the amount that the section moved. */ + section = aout_reloc_type_to_section (input_bfd, r_type); + relocation = (section->output_section->vma + + section->output_offset + - section->vma); + } + + /* Change the address of the relocation. */ + fprintf (stderr, "TODO: change the address of the relocation\n"); + + /* Adjust a PC relative relocation by removing the reference + to the original address in the section and including the + reference to the new address. */ + if (r_pcrel) + relocation -= (input_section->output_section->vma + + input_section->output_offset + - input_section->vma); + +#ifdef MY_relocatable_reloc + MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); +#endif + + if (relocation == 0) + r = bfd_reloc_ok; + else + r = MY_relocate_contents (howto, + input_bfd, relocation, + contents + r_addr); + } + else + { + bfd_boolean hundef; + + /* We are generating an executable, and must do a full + relocation. */ + hundef = FALSE; + if (r_extern) + { + h = sym_hashes[r_index]; + + if (h != NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)) + { + relocation = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + else if (h != NULL + && h->root.type == bfd_link_hash_undefweak) + relocation = 0; + else + { + hundef = TRUE; + relocation = 0; + } + } + else + { + asection *section; + + section = aout_reloc_type_to_section (input_bfd, r_type); + relocation = (section->output_section->vma + + section->output_offset + - section->vma); + if (r_pcrel) + relocation += input_section->vma; + } + + if (check_dynamic_reloc != NULL) + { + bfd_boolean skip; + + if (! ((*check_dynamic_reloc) + (finfo->info, input_bfd, input_section, h, + (void *) rel, contents, &skip, &relocation))) + return FALSE; + if (skip) + continue; + } + + /* Now warn if a global symbol is undefined. We could not + do this earlier, because check_dynamic_reloc might want + to skip this reloc. */ + if (hundef && ! finfo->info->shared) + { + const char *name; + + if (h != NULL) + name = h->root.root.string; + else + name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); + if (! ((*finfo->info->callbacks->undefined_symbol) + (finfo->info, name, input_bfd, input_section, + r_addr, TRUE))) + return FALSE; + } + + r = MY_final_link_relocate (howto, + input_bfd, input_section, + contents, r_addr, relocation, + (bfd_vma) 0); + } + + if (r != bfd_reloc_ok) + { + switch (r) + { + default: + case bfd_reloc_outofrange: + abort (); + case bfd_reloc_overflow: + { + const char *name; + + if (h != NULL) + name = NULL; + else if (r_extern) + name = strings + GET_WORD (input_bfd, + syms[r_index].e_strx); + else + { + asection *s; + + s = aout_reloc_type_to_section (input_bfd, r_type); + name = bfd_section_name (input_bfd, s); + } + if (! ((*finfo->info->callbacks->reloc_overflow) + (finfo->info, (h ? &h->root : NULL), name, + howto->name, (bfd_vma) 0, input_bfd, + input_section, r_addr))) + return FALSE; + } + break; + } + } + } + + return TRUE; +} + +/* Link an a.out section into the output file. */ + +static bfd_boolean +aout_link_input_section (struct aout_final_link_info *finfo, + bfd *input_bfd, + asection *input_section, + file_ptr *reloff_ptr, + bfd_size_type rel_size) +{ + bfd_size_type input_size; + void * relocs; + + /* Get the section contents. */ + input_size = input_section->size; + if (! bfd_get_section_contents (input_bfd, input_section, + (void *) finfo->contents, + (file_ptr) 0, input_size)) + return FALSE; + + /* Read in the relocs if we haven't already done it. */ + if (aout_section_data (input_section) != NULL + && aout_section_data (input_section)->relocs != NULL) + relocs = aout_section_data (input_section)->relocs; + else + { + relocs = finfo->relocs; + if (rel_size > 0) + { + if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 + || bfd_bread (relocs, rel_size, input_bfd) != rel_size) + return FALSE; + } + } + + /* Relocate the section contents. */ + if (! pdp11_aout_link_input_section (finfo, input_bfd, input_section, + (bfd_byte *) relocs, + rel_size, finfo->contents)) + return FALSE; + + /* Write out the section contents. */ + if (! bfd_set_section_contents (finfo->output_bfd, + input_section->output_section, + (void *) finfo->contents, + (file_ptr) input_section->output_offset, + input_size)) + return FALSE; + + /* If we are producing relocatable output, the relocs were + modified, and we now write them out. */ + if (finfo->info->relocatable && rel_size > 0) + { + if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) + return FALSE; + if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size) + return FALSE; + *reloff_ptr += rel_size; + + /* Assert that the relocs have not run into the symbols, and + that if these are the text relocs they have not run into the + data relocs. */ + BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) + && (reloff_ptr != &finfo->treloff + || (*reloff_ptr + <= obj_datasec (finfo->output_bfd)->rel_filepos))); + } + + return TRUE; +} + +/* Link an a.out input BFD into the output file. */ + +static bfd_boolean +aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd) +{ + bfd_size_type sym_count; + + BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); + + /* If this is a dynamic object, it may need special handling. */ + if ((input_bfd->flags & DYNAMIC) != 0 + && aout_backend_info (input_bfd)->link_dynamic_object != NULL) + return ((*aout_backend_info (input_bfd)->link_dynamic_object) + (finfo->info, input_bfd)); + + /* Get the symbols. We probably have them already, unless + finfo->info->keep_memory is FALSE. */ + if (! aout_get_external_symbols (input_bfd)) + return FALSE; + + sym_count = obj_aout_external_sym_count (input_bfd); + + /* Write out the symbols and get a map of the new indices. The map + is placed into finfo->symbol_map. */ + if (! aout_link_write_symbols (finfo, input_bfd)) + return FALSE; + + /* Relocate and write out the sections. These functions use the + symbol map created by aout_link_write_symbols. The linker_mark + field will be set if these sections are to be included in the + link, which will normally be the case. */ + if (obj_textsec (input_bfd)->linker_mark) + { + if (! aout_link_input_section (finfo, input_bfd, + obj_textsec (input_bfd), + &finfo->treloff, + exec_hdr (input_bfd)->a_trsize)) + return FALSE; + } + if (obj_datasec (input_bfd)->linker_mark) + { + if (! aout_link_input_section (finfo, input_bfd, + obj_datasec (input_bfd), + &finfo->dreloff, + exec_hdr (input_bfd)->a_drsize)) + return FALSE; + } + + /* If we are not keeping memory, we don't need the symbols any + longer. We still need them if we are keeping memory, because the + strings in the hash table point into them. */ + if (! finfo->info->keep_memory) + { + if (! aout_link_free_symbols (input_bfd)) + return FALSE; + } + + return TRUE; +} + +/* Do the final link step. This is called on the output BFD. The + INFO structure should point to a list of BFDs linked through the + link_next field which can be used to find each BFD which takes part + in the output. Also, each section in ABFD should point to a list + of bfd_link_order structures which list all the input sections for + the output section. */ + +bfd_boolean +NAME (aout, final_link) (bfd *abfd, + struct bfd_link_info *info, + void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *)) +{ + struct aout_final_link_info aout_info; + bfd_boolean includes_hash_initialized = FALSE; + bfd *sub; + bfd_size_type trsize, drsize; + bfd_size_type max_contents_size; + bfd_size_type max_relocs_size; + bfd_size_type max_sym_count; + bfd_size_type text_size; + file_ptr text_end; + struct bfd_link_order *p; + asection *o; + bfd_boolean have_link_order_relocs; + + if (info->shared) + abfd->flags |= DYNAMIC; + + aout_info.info = info; + aout_info.output_bfd = abfd; + aout_info.contents = NULL; + aout_info.relocs = NULL; + aout_info.symbol_map = NULL; + aout_info.output_syms = NULL; + + if (!bfd_hash_table_init_n (&aout_info.includes.root, + aout_link_includes_newfunc, + sizeof (struct aout_link_includes_entry), + 251)) + goto error_return; + includes_hash_initialized = TRUE; + + /* Figure out the largest section size. Also, if generating + relocatable output, count the relocs. */ + trsize = 0; + drsize = 0; + max_contents_size = 0; + max_relocs_size = 0; + max_sym_count = 0; + for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) + { + size_t sz; + + if (info->relocatable) + { + if (bfd_get_flavour (sub) == bfd_target_aout_flavour) + { + trsize += exec_hdr (sub)->a_trsize; + drsize += exec_hdr (sub)->a_drsize; + } + else + { + /* FIXME: We need to identify the .text and .data sections + and call get_reloc_upper_bound and canonicalize_reloc to + work out the number of relocs needed, and then multiply + by the reloc size. */ + (*_bfd_error_handler) + ("%s: relocatable link from %s to %s not supported", + bfd_get_filename (abfd), + sub->xvec->name, abfd->xvec->name); + bfd_set_error (bfd_error_invalid_operation); + goto error_return; + } + } + + if (bfd_get_flavour (sub) == bfd_target_aout_flavour) + { + sz = obj_textsec (sub)->size; + if (sz > max_contents_size) + max_contents_size = sz; + sz = obj_datasec (sub)->size; + if (sz > max_contents_size) + max_contents_size = sz; + + sz = exec_hdr (sub)->a_trsize; + if (sz > max_relocs_size) + max_relocs_size = sz; + sz = exec_hdr (sub)->a_drsize; + if (sz > max_relocs_size) + max_relocs_size = sz; + + sz = obj_aout_external_sym_count (sub); + if (sz > max_sym_count) + max_sym_count = sz; + } + } + + if (info->relocatable) + { + if (obj_textsec (abfd) != NULL) + trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) + ->map_head.link_order) + * obj_reloc_entry_size (abfd)); + if (obj_datasec (abfd) != NULL) + drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) + ->map_head.link_order) + * obj_reloc_entry_size (abfd)); + } + + exec_hdr (abfd)->a_trsize = trsize; + exec_hdr (abfd)->a_drsize = drsize; + exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); + + /* Adjust the section sizes and vmas according to the magic number. + This sets a_text, a_data and a_bss in the exec_hdr and sets the + filepos for each section. */ + if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) + goto error_return; + + /* The relocation and symbol file positions differ among a.out + targets. We are passed a callback routine from the backend + specific code to handle this. + FIXME: At this point we do not know how much space the symbol + table will require. This will not work for any (nonstandard) + a.out target that needs to know the symbol table size before it + can compute the relocation file positions. This may or may not + be the case for the hp300hpux target, for example. */ + (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, + &aout_info.symoff); + obj_textsec (abfd)->rel_filepos = aout_info.treloff; + obj_datasec (abfd)->rel_filepos = aout_info.dreloff; + obj_sym_filepos (abfd) = aout_info.symoff; + + /* We keep a count of the symbols as we output them. */ + obj_aout_external_sym_count (abfd) = 0; + + /* We accumulate the string table as we write out the symbols. */ + aout_info.strtab = _bfd_stringtab_init (); + if (aout_info.strtab == NULL) + goto error_return; + + /* Allocate buffers to hold section contents and relocs. */ + aout_info.contents = bfd_malloc (max_contents_size); + aout_info.relocs = bfd_malloc (max_relocs_size); + aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *)); + aout_info.output_syms = bfd_malloc ((max_sym_count + 1) + * sizeof (struct external_nlist)); + if ((aout_info.contents == NULL && max_contents_size != 0) + || (aout_info.relocs == NULL && max_relocs_size != 0) + || (aout_info.symbol_map == NULL && max_sym_count != 0) + || aout_info.output_syms == NULL) + goto error_return; + + /* If we have a symbol named __DYNAMIC, force it out now. This is + required by SunOS. Doing this here rather than in sunos.c is a + hack, but it's easier than exporting everything which would be + needed. */ + { + struct aout_link_hash_entry *h; + + h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", + FALSE, FALSE, FALSE); + if (h != NULL) + aout_link_write_other_symbol (h, &aout_info); + } + + /* The most time efficient way to do the link would be to read all + the input object files into memory and then sort out the + information into the output file. Unfortunately, that will + probably use too much memory. Another method would be to step + through everything that composes the text section and write it + out, and then everything that composes the data section and write + it out, and then write out the relocs, and then write out the + symbols. Unfortunately, that requires reading stuff from each + input file several times, and we will not be able to keep all the + input files open simultaneously, and reopening them will be slow. + + What we do is basically process one input file at a time. We do + everything we need to do with an input file once--copy over the + section contents, handle the relocation information, and write + out the symbols--and then we throw away the information we read + from it. This approach requires a lot of lseeks of the output + file, which is unfortunate but still faster than reopening a lot + of files. + + We use the output_has_begun field of the input BFDs to see + whether we have already handled it. */ + for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) + sub->output_has_begun = FALSE; + + /* Mark all sections which are to be included in the link. This + will normally be every section. We need to do this so that we + can identify any sections which the linker has decided to not + include. */ + for (o = abfd->sections; o != NULL; o = o->next) + { + for (p = o->map_head.link_order; p != NULL; p = p->next) + if (p->type == bfd_indirect_link_order) + p->u.indirect.section->linker_mark = TRUE; + } + + have_link_order_relocs = FALSE; + for (o = abfd->sections; o != NULL; o = o->next) + { + for (p = o->map_head.link_order; + p != NULL; + p = p->next) + { + if (p->type == bfd_indirect_link_order + && (bfd_get_flavour (p->u.indirect.section->owner) + == bfd_target_aout_flavour)) + { + bfd *input_bfd; + + input_bfd = p->u.indirect.section->owner; + if (! input_bfd->output_has_begun) + { + if (! aout_link_input_bfd (&aout_info, input_bfd)) + goto error_return; + input_bfd->output_has_begun = TRUE; + } + } + else if (p->type == bfd_section_reloc_link_order + || p->type == bfd_symbol_reloc_link_order) + /* These are handled below. */ + have_link_order_relocs = TRUE; + else + { + if (! _bfd_default_link_order (abfd, info, o, p)) + goto error_return; + } + } + } + + /* Write out any symbols that we have not already written out. */ + aout_link_hash_traverse (aout_hash_table (info), + aout_link_write_other_symbol, + (void *) &aout_info); + + /* Now handle any relocs we were asked to create by the linker. + These did not come from any input file. We must do these after + we have written out all the symbols, so that we know the symbol + indices to use. */ + if (have_link_order_relocs) + { + for (o = abfd->sections; o != NULL; o = o->next) + { + for (p = o->map_head.link_order; + p != NULL; + p = p->next) + { + if (p->type == bfd_section_reloc_link_order + || p->type == bfd_symbol_reloc_link_order) + { + if (! aout_link_reloc_link_order (&aout_info, o, p)) + goto error_return; + } + } + } + } + + if (aout_info.contents != NULL) + { + free (aout_info.contents); + aout_info.contents = NULL; + } + if (aout_info.relocs != NULL) + { + free (aout_info.relocs); + aout_info.relocs = NULL; + } + if (aout_info.symbol_map != NULL) + { + free (aout_info.symbol_map); + aout_info.symbol_map = NULL; + } + if (aout_info.output_syms != NULL) + { + free (aout_info.output_syms); + aout_info.output_syms = NULL; + } + if (includes_hash_initialized) + { + bfd_hash_table_free (&aout_info.includes.root); + includes_hash_initialized = FALSE; + } + + /* Finish up any dynamic linking we may be doing. */ + if (aout_backend_info (abfd)->finish_dynamic_link != NULL) + { + if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) + goto error_return; + } + + /* Update the header information. */ + abfd->symcount = obj_aout_external_sym_count (abfd); + exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; + obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; + obj_textsec (abfd)->reloc_count = + exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); + obj_datasec (abfd)->reloc_count = + exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); + + /* Write out the string table, unless there are no symbols. */ + if (abfd->symcount > 0) + { + if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 + || ! emit_stringtab (abfd, aout_info.strtab)) + goto error_return; + } + else if (obj_textsec (abfd)->reloc_count == 0 + && obj_datasec (abfd)->reloc_count == 0) + { + bfd_byte b; + + b = 0; + if (bfd_seek (abfd, + (file_ptr) (obj_datasec (abfd)->filepos + + exec_hdr (abfd)->a_data + - 1), + SEEK_SET) != 0 + || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1) + goto error_return; + } + + return TRUE; + + error_return: + if (aout_info.contents != NULL) + free (aout_info.contents); + if (aout_info.relocs != NULL) + free (aout_info.relocs); + if (aout_info.symbol_map != NULL) + free (aout_info.symbol_map); + if (aout_info.output_syms != NULL) + free (aout_info.output_syms); + if (includes_hash_initialized) + bfd_hash_table_free (&aout_info.includes.root); + return FALSE; +} + +/* Adjust and write out the symbols for an a.out file. Set the new + symbol indices into a symbol_map. */ + +static bfd_boolean +aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd) +{ + bfd *output_bfd; + bfd_size_type sym_count; + char *strings; + enum bfd_link_strip strip; + enum bfd_link_discard discard; + struct external_nlist *outsym; + bfd_size_type strtab_index; + struct external_nlist *sym; + struct external_nlist *sym_end; + struct aout_link_hash_entry **sym_hash; + int *symbol_map; + bfd_boolean pass; + bfd_boolean skip_next; + + output_bfd = finfo->output_bfd; + sym_count = obj_aout_external_sym_count (input_bfd); + strings = obj_aout_external_strings (input_bfd); + strip = finfo->info->strip; + discard = finfo->info->discard; + outsym = finfo->output_syms; + + /* First write out a symbol for this object file, unless we are + discarding such symbols. */ + if (strip != strip_all + && (strip != strip_some + || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, + FALSE, FALSE) != NULL) + && discard != discard_all) + { + H_PUT_8 (output_bfd, N_TEXT, outsym->e_type); + strtab_index = add_to_stringtab (output_bfd, finfo->strtab, + input_bfd->filename, FALSE); + if (strtab_index == (bfd_size_type) -1) + return FALSE; + PUT_WORD (output_bfd, strtab_index, outsym->e_strx); + PUT_WORD (output_bfd, + (bfd_get_section_vma (output_bfd, + obj_textsec (input_bfd)->output_section) + + obj_textsec (input_bfd)->output_offset), + outsym->e_value); + ++obj_aout_external_sym_count (output_bfd); + ++outsym; + } + + pass = FALSE; + skip_next = FALSE; + sym = obj_aout_external_syms (input_bfd); + sym_end = sym + sym_count; + sym_hash = obj_aout_sym_hashes (input_bfd); + symbol_map = finfo->symbol_map; + memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map); + for (; sym < sym_end; sym++, sym_hash++, symbol_map++) + { + const char *name; + int type; + struct aout_link_hash_entry *h; + bfd_boolean skip; + asection *symsec; + bfd_vma val = 0; + bfd_boolean copy; + + /* We set *symbol_map to 0 above for all symbols. If it has + already been set to -1 for this symbol, it means that we are + discarding it because it appears in a duplicate header file. + See the N_BINCL code below. */ + if (*symbol_map == -1) + continue; + + /* Initialize *symbol_map to -1, which means that the symbol was + not copied into the output file. We will change it later if + we do copy the symbol over. */ + *symbol_map = -1; + + type = H_GET_8 (input_bfd, sym->e_type); + name = strings + GET_WORD (input_bfd, sym->e_strx); + + h = NULL; + + if (pass) + { + /* Pass this symbol through. It is the target of an + indirect or warning symbol. */ + val = GET_WORD (input_bfd, sym->e_value); + pass = FALSE; + } + else if (skip_next) + { + /* Skip this symbol, which is the target of an indirect + symbol that we have changed to no longer be an indirect + symbol. */ + skip_next = FALSE; + continue; + } + else + { + struct aout_link_hash_entry *hresolve; + + /* We have saved the hash table entry for this symbol, if + there is one. Note that we could just look it up again + in the hash table, provided we first check that it is an + external symbol. */ + h = *sym_hash; + + /* Use the name from the hash table, in case the symbol was + wrapped. */ + if (h != NULL) + name = h->root.root.string; + + /* If this is an indirect or warning symbol, then change + hresolve to the base symbol. We also change *sym_hash so + that the relocation routines relocate against the real + symbol. */ + hresolve = h; + if (h != NULL + && (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning)) + { + hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; + while (hresolve->root.type == bfd_link_hash_indirect + || hresolve->root.type == bfd_link_hash_warning) + hresolve = ((struct aout_link_hash_entry *) + hresolve->root.u.i.link); + *sym_hash = hresolve; + } + + /* If the symbol has already been written out, skip it. */ + if (h != NULL + && h->root.type != bfd_link_hash_warning + && h->written) + { + if ((type & N_TYPE) == N_INDR + || type == N_WARNING) + skip_next = TRUE; + *symbol_map = h->indx; + continue; + } + + /* See if we are stripping this symbol. */ + skip = FALSE; + switch (strip) + { + case strip_none: + break; + case strip_debugger: + if ((type & N_STAB) != 0) + skip = TRUE; + break; + case strip_some: + if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) + == NULL) + skip = TRUE; + break; + case strip_all: + skip = TRUE; + break; + } + if (skip) + { + if (h != NULL) + h->written = TRUE; + continue; + } + + /* Get the value of the symbol. */ + if ((type & N_TYPE) == N_TEXT + || type == N_WEAKT) + symsec = obj_textsec (input_bfd); + else if ((type & N_TYPE) == N_DATA + || type == N_WEAKD) + symsec = obj_datasec (input_bfd); + else if ((type & N_TYPE) == N_BSS + || type == N_WEAKB) + symsec = obj_bsssec (input_bfd); + else if ((type & N_TYPE) == N_ABS + || type == N_WEAKA) + symsec = bfd_abs_section_ptr; + else if (((type & N_TYPE) == N_INDR + && (hresolve == NULL + || (hresolve->root.type != bfd_link_hash_defined + && hresolve->root.type != bfd_link_hash_defweak + && hresolve->root.type != bfd_link_hash_common))) + || type == N_WARNING) + { + /* Pass the next symbol through unchanged. The + condition above for indirect symbols is so that if + the indirect symbol was defined, we output it with + the correct definition so the debugger will + understand it. */ + pass = TRUE; + val = GET_WORD (input_bfd, sym->e_value); + symsec = NULL; + } + else if ((type & N_STAB) != 0) + { + val = GET_WORD (input_bfd, sym->e_value); + symsec = NULL; + } + else + { + /* If we get here with an indirect symbol, it means that + we are outputting it with a real definition. In such + a case we do not want to output the next symbol, + which is the target of the indirection. */ + if ((type & N_TYPE) == N_INDR) + skip_next = TRUE; + + symsec = NULL; + + /* We need to get the value from the hash table. We use + hresolve so that if we have defined an indirect + symbol we output the final definition. */ + if (h == NULL) + { + switch (type & N_TYPE) + { + case N_SETT: + symsec = obj_textsec (input_bfd); + break; + case N_SETD: + symsec = obj_datasec (input_bfd); + break; + case N_SETB: + symsec = obj_bsssec (input_bfd); + break; + case N_SETA: + symsec = bfd_abs_section_ptr; + break; + default: + val = 0; + break; + } + } + else if (hresolve->root.type == bfd_link_hash_defined + || hresolve->root.type == bfd_link_hash_defweak) + { + asection *input_section; + asection *output_section; + + /* This case usually means a common symbol which was + turned into a defined symbol. */ + input_section = hresolve->root.u.def.section; + output_section = input_section->output_section; + BFD_ASSERT (bfd_is_abs_section (output_section) + || output_section->owner == output_bfd); + val = (hresolve->root.u.def.value + + bfd_get_section_vma (output_bfd, output_section) + + input_section->output_offset); + + /* Get the correct type based on the section. If + this is a constructed set, force it to be + globally visible. */ + if (type == N_SETT + || type == N_SETD + || type == N_SETB + || type == N_SETA) + type |= N_EXT; + + type &=~ N_TYPE; + + if (output_section == obj_textsec (output_bfd)) + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_TEXT + : N_WEAKT); + else if (output_section == obj_datasec (output_bfd)) + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_DATA + : N_WEAKD); + else if (output_section == obj_bsssec (output_bfd)) + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_BSS + : N_WEAKB); + else + type |= (hresolve->root.type == bfd_link_hash_defined + ? N_ABS + : N_WEAKA); + } + else if (hresolve->root.type == bfd_link_hash_common) + val = hresolve->root.u.c.size; + else if (hresolve->root.type == bfd_link_hash_undefweak) + { + val = 0; + type = N_WEAKU; + } + else + val = 0; + } + if (symsec != NULL) + val = (symsec->output_section->vma + + symsec->output_offset + + (GET_WORD (input_bfd, sym->e_value) + - symsec->vma)); + + /* If this is a global symbol set the written flag, and if + it is a local symbol see if we should discard it. */ + if (h != NULL) + { + h->written = TRUE; + h->indx = obj_aout_external_sym_count (output_bfd); + } + else if ((type & N_TYPE) != N_SETT + && (type & N_TYPE) != N_SETD + && (type & N_TYPE) != N_SETB + && (type & N_TYPE) != N_SETA) + { + switch (discard) + { + case discard_none: + case discard_sec_merge: + break; + case discard_l: + if ((type & N_STAB) == 0 + && bfd_is_local_label_name (input_bfd, name)) + skip = TRUE; + break; + case discard_all: + skip = TRUE; + break; + } + if (skip) + { + pass = FALSE; + continue; + } + } + + /* An N_BINCL symbol indicates the start of the stabs + entries for a header file. We need to scan ahead to the + next N_EINCL symbol, ignoring nesting, adding up all the + characters in the symbol names, not including the file + numbers in types (the first number after an open + parenthesis). */ + if (type == N_BINCL) + { + struct external_nlist *incl_sym; + int nest; + struct aout_link_includes_entry *incl_entry; + struct aout_link_includes_totals *t; + + val = 0; + nest = 0; + for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) + { + int incl_type; + + incl_type = H_GET_8 (input_bfd, incl_sym->e_type); + if (incl_type == N_EINCL) + { + if (nest == 0) + break; + --nest; + } + else if (incl_type == N_BINCL) + ++nest; + else if (nest == 0) + { + const char *s; + + s = strings + GET_WORD (input_bfd, incl_sym->e_strx); + for (; *s != '\0'; s++) + { + val += *s; + if (*s == '(') + { + /* Skip the file number. */ + ++s; + while (ISDIGIT (*s)) + ++s; + --s; + } + } + } + } + + /* If we have already included a header file with the + same value, then replace this one with an N_EXCL + symbol. */ + copy = ! finfo->info->keep_memory; + incl_entry = aout_link_includes_lookup (&finfo->includes, + name, TRUE, copy); + if (incl_entry == NULL) + return FALSE; + for (t = incl_entry->totals; t != NULL; t = t->next) + if (t->total == val) + break; + if (t == NULL) + { + /* This is the first time we have seen this header + file with this set of stabs strings. */ + t = bfd_hash_allocate (&finfo->includes.root, + sizeof *t); + if (t == NULL) + return FALSE; + t->total = val; + t->next = incl_entry->totals; + incl_entry->totals = t; + } + else + { + int *incl_map; + + /* This is a duplicate header file. We must change + it to be an N_EXCL entry, and mark all the + included symbols to prevent outputting them. */ + type = N_EXCL; + + nest = 0; + for (incl_sym = sym + 1, incl_map = symbol_map + 1; + incl_sym < sym_end; + incl_sym++, incl_map++) + { + int incl_type; + + incl_type = H_GET_8 (input_bfd, incl_sym->e_type); + if (incl_type == N_EINCL) + { + if (nest == 0) + { + *incl_map = -1; + break; + } + --nest; + } + else if (incl_type == N_BINCL) + ++nest; + else if (nest == 0) + *incl_map = -1; + } + } + } + } + + /* Copy this symbol into the list of symbols we are going to + write out. */ + H_PUT_8 (output_bfd, type, outsym->e_type); + copy = FALSE; + if (! finfo->info->keep_memory) + { + /* name points into a string table which we are going to + free. If there is a hash table entry, use that string. + Otherwise, copy name into memory. */ + if (h != NULL) + name = h->root.root.string; + else + copy = TRUE; + } + strtab_index = add_to_stringtab (output_bfd, finfo->strtab, + name, copy); + if (strtab_index == (bfd_size_type) -1) + return FALSE; + PUT_WORD (output_bfd, strtab_index, outsym->e_strx); + PUT_WORD (output_bfd, val, outsym->e_value); + *symbol_map = obj_aout_external_sym_count (output_bfd); + ++obj_aout_external_sym_count (output_bfd); + ++outsym; + } + + /* Write out the output symbols we have just constructed. */ + if (outsym > finfo->output_syms) + { + bfd_size_type size; + + if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) + return FALSE; + size = outsym - finfo->output_syms; + size *= EXTERNAL_NLIST_SIZE; + if (bfd_bwrite ((void *) finfo->output_syms, size, output_bfd) != size) + return FALSE; + finfo->symoff += size; + } + + return TRUE; +} + +/* Write out a symbol that was not associated with an a.out input + object. */ + +static bfd_vma +bfd_getp32 (const void *p) +{ + const bfd_byte *addr = p; + unsigned long v; + + v = (unsigned long) addr[1] << 24; + v |= (unsigned long) addr[0] << 16; + v |= (unsigned long) addr[3] << 8; + v |= (unsigned long) addr[2]; + return v; +} + +#define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000) + +static bfd_signed_vma +bfd_getp_signed_32 (const void *p) +{ + const bfd_byte *addr = p; + unsigned long v; + + v = (unsigned long) addr[1] << 24; + v |= (unsigned long) addr[0] << 16; + v |= (unsigned long) addr[3] << 8; + v |= (unsigned long) addr[2]; + return COERCE32 (v); +} + +static void +bfd_putp32 (bfd_vma data, void *p) +{ + bfd_byte *addr = p; + + addr[0] = (data >> 16) & 0xff; + addr[1] = (data >> 24) & 0xff; + addr[2] = (data >> 0) & 0xff; + addr[3] = (data >> 8) & 0xff; +} + +const bfd_target MY (vec) = +{ + TARGETNAME, /* Name. */ + bfd_target_aout_flavour, + BFD_ENDIAN_LITTLE, /* Target byte order (little). */ + BFD_ENDIAN_LITTLE, /* Target headers byte order (little). */ + (HAS_RELOC | EXEC_P | /* Object flags. */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | WP_TEXT), + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), + MY_symbol_leading_char, + AR_PAD_CHAR, /* AR_pad_char. */ + 15, /* AR_max_namelen. */ + bfd_getl64, bfd_getl_signed_64, bfd_putl64, + bfd_getp32, bfd_getp_signed_32, bfd_putp32, + bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ + bfd_getl64, bfd_getl_signed_64, bfd_putl64, + bfd_getp32, bfd_getp_signed_32, bfd_putp32, + bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */ + {_bfd_dummy_target, MY_object_p, /* bfd_check_format. */ + bfd_generic_archive_p, MY_core_file_p}, + {bfd_false, MY_mkobject, /* bfd_set_format. */ + _bfd_generic_mkarchive, bfd_false}, + {bfd_false, MY_write_object_contents, /* bfd_write_contents. */ + _bfd_write_archive_contents, bfd_false}, + + BFD_JUMP_TABLE_GENERIC (MY), + BFD_JUMP_TABLE_COPY (MY), + BFD_JUMP_TABLE_CORE (MY), + BFD_JUMP_TABLE_ARCHIVE (MY), + BFD_JUMP_TABLE_SYMBOLS (MY), + BFD_JUMP_TABLE_RELOCS (MY), + BFD_JUMP_TABLE_WRITE (MY), + BFD_JUMP_TABLE_LINK (MY), + BFD_JUMP_TABLE_DYNAMIC (MY), + + /* Alternative_target. */ + NULL, + + (void *) MY_backend_data +}; |