From 5303ab61e0fbf40ed6ec7f421dbd767d5276ac1e Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Fri, 2 Jan 1998 21:48:33 +0000 Subject: [PATCH] Initial revision --- src/prefix-args.c | 53 +++++++++ src/unexapollo.c | 294 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 347 insertions(+) create mode 100644 src/prefix-args.c create mode 100644 src/unexapollo.c diff --git a/src/prefix-args.c b/src/prefix-args.c new file mode 100644 index 00000000000..8be1558f08a --- /dev/null +++ b/src/prefix-args.c @@ -0,0 +1,53 @@ +/* prefix-args.c - echo each argument, prefixed by a string. + Jim Blandy - September 1992 + + When using GCC 2 as the linker in the build process, options + intended for the linker need to be prefixed with the "-Xlinker" + option. If an option takes an argument, we need to use -Xlinker + twice - once for the option and once for its argument. For + example, to run the linker with the options "-Bstatic" "-e" + "_start", you'd need to pass the following options to GCC: + + -Xlinker -Bstatic -Xlinker -e -Xlinker _start. + + The Emacs makefile used to use a Bourne Shell `for' loop to prefix + each linker option with "-Xlinker", but 1) the for loop was hairier + than one might hope because it had to work when there were no + arguments to pass to the linker - the shell barfs on a loop like + this: + + for arg in ; do echo -Xlinker "$arg"; done + + and 2) the whole compilation command containing this loop seems to + exit with a non-zero status and halt the build under Ultrix. + + If I can't write a completely portable program to do this in C, + I'm quitting and taking up gardening. */ + +#include + +main (argc, argv) + int argc; + char **argv; +{ + char *progname; + char *prefix; + + progname = argv[0]; + argc--, argv++; + + if (argc < 1) + { + fprintf (stderr, "Usage: %s PREFIX ARGS...\n\ +Echo each ARG preceded by PREFIX and a space.\n", progname); + exit (2); + } + + prefix = argv[0]; + argc--, argv++; + + for (; argc > 0; argc--, argv++) + printf ("%s %s%c", prefix, argv[0], (argc > 1) ? ' ' : '\n'); + + exit (0); +} diff --git a/src/unexapollo.c b/src/unexapollo.c new file mode 100644 index 00000000000..4c87bfa3fe4 --- /dev/null +++ b/src/unexapollo.c @@ -0,0 +1,294 @@ +/* unexapollo.c -- COFF File UNEXEC for GNU Emacs on Apollo SR10.x + Copyright (C) 1988, 1994 Free Software Foundation, Inc. + +This file is part of GNU Emacs. + +GNU Emacs 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 2, or (at your option) +any later version. + +GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* Written by Leonard N. Zubkoff. */ + +#include "config.h" +#include + + +#include +#include +#include +#include +#include +#include + + +#define DST_RECORD_HDR_SIZE 2 +#define LONG_ALIGN(X) (((X)+3)&(~3)) + + +void +unexec (target_file_name, source_file_name) + char *target_file_name, *source_file_name; +{ + struct filehdr file_header; + struct aouthdr domain_header; + struct scnhdr *section, *sections, *sections_limit; + struct scnhdr *first_data_section, *last_data_section; + struct scnhdr *rwdi_section, *blocks_section; + struct reloc reloc_entry; + unsigned long data_size, old_data_section_size, source_file_offset_past_rwdi; + unsigned char buffer[4096]; + long delta_before_rwdi, delta_after_rwdi, byte_count; + long first_changed_vaddr, old_rwdi_vaddr, i; + ios_$id_t target_file, source_file; + status_$t status; + /* Open the Source File. */ + if ((source_file = open (source_file_name, O_RDONLY)) < 0) + error ("cannot open source file for input"); + /* Read the File Header. */ + if (read (source_file, &file_header, sizeof (file_header)) != sizeof (file_header)) + error ("cannot read file header"); + + /* Read the Domain Header. */ + if (read (source_file, &domain_header, sizeof (domain_header)) + != sizeof (domain_header)) + error ("cannot read domain header"); + /* Read the Section Headers. */ + sections = + (struct scnhdr *) malloc (file_header.f_nscns*sizeof (struct scnhdr)); + if (sections == (struct scnhdr *) 0) + error ("cannot allocate section header storage"); + sections_limit = sections + file_header.f_nscns; + if (read (source_file, sections, file_header.f_nscns*sizeof (struct scnhdr)) + != file_header.f_nscns*sizeof (struct scnhdr)) + error ("cannot read section headers"); + /* Compute the new Size of the Data Section. */ + data_size = sbrk (0) - domain_header.data_start; + delta_before_rwdi = delta_after_rwdi = data_size - domain_header.dsize; + old_rwdi_vaddr = 0; + /* Find and Deallocate the .rwdi Section Information. */ + for (rwdi_section = sections; rwdi_section != sections_limit; rwdi_section++) + if (strcmp (rwdi_section->s_name, ".rwdi") == 0) + { + /* If there are relocation entries, we cannot "unrelocate" them. */ + if (rwdi_section->s_nreloc > 0) + error (".rwdi section needs relocation - cannot dump Emacs"); + delta_after_rwdi = delta_before_rwdi - rwdi_section->s_size; + old_rwdi_vaddr = rwdi_section->s_vaddr; + rwdi_section->s_paddr = 0; + rwdi_section->s_vaddr = 0; + rwdi_section->s_scnptr = 0; + rwdi_section->s_size = 0; + source_file_offset_past_rwdi = (rwdi_section+1)->s_scnptr; + break; + } + /* Skip over the Text Section Headers. */ + for (section = sections; (section->s_flags & STYP_TEXT) != 0; section++) ; + /* + Find the First and Last Data Sections and Fixup + Section Header Relocation Pointers. + */ + first_data_section = last_data_section = (struct scnhdr *) 0; + for (; section != sections_limit; section++) + { + if ((section->s_flags & STYP_DATA) != 0) + { + if (first_data_section == (struct scnhdr *) 0) + first_data_section = section; + last_data_section = section; + } + if (section->s_relptr != 0) + section->s_relptr += delta_after_rwdi; + } + /* Increment the Size of the Last Data Section. */ + old_data_section_size = last_data_section->s_size; + last_data_section->s_size += delta_before_rwdi; + + /* Update the File Header and Domain Header. */ + file_header.f_symptr += delta_after_rwdi; + domain_header.dsize = data_size; + domain_header.bsize = 0; + /* Skip over subsequent Bss Section Headers. */ + for (section = last_data_section+1; + (section->s_flags & STYP_BSS) != 0; section++) ; + /* Update the remaining Section Headers. */ + blocks_section = (struct scnhdr *) 0; + first_changed_vaddr = 0; + for (; section != sections_limit; section++) + { + long delta = (section < rwdi_section ? delta_before_rwdi : delta_after_rwdi); + if (section->s_paddr != 0) + section->s_paddr += delta; + if (section->s_vaddr != 0) + { + if (first_changed_vaddr == 0) + first_changed_vaddr = section->s_vaddr; + section->s_vaddr += delta; + } + if (section->s_scnptr != 0) + section->s_scnptr += delta; + if (strcmp (section->s_name, ".blocks") == 0) + blocks_section = section; + else if (strcmp (section->s_name, ".sri") == 0 && + domain_header.o_sri != 0) + domain_header.o_sri += delta; + else if (strcmp (section->s_name, ".inlib") == 0 && + domain_header.o_inlib != 0) + domain_header.o_inlib += delta; + } + /* Open the Target File. */ + ios_$create (target_file_name, strlen (target_file_name), coff_$uid, + ios_$recreate_mode, ios_$write_opt, &target_file, &status); + if (status.all != status_$ok) + error ("cannot open target file for output"); + /* Write the File Header. */ + if (write (target_file, &file_header, sizeof (file_header)) != sizeof (file_header)) + error ("cannot write file header"); + /* Write the Domain Header. */ + if (write (target_file, &domain_header, sizeof (domain_header)) + != sizeof (domain_header)) + error ("cannot write domain header"); + /* Write the Section Headers. */ + if (write (target_file, sections, file_header.f_nscns*sizeof (struct scnhdr)) + != file_header.f_nscns*sizeof (struct scnhdr)) + error ("cannot write section headers"); + /* Copy the Allocated Sections. */ + for (section = sections; section != first_data_section; section++) + if (section->s_scnptr != 0) + CopyData (target_file, source_file, LONG_ALIGN(section->s_size)); + /* Write the Expanded Data Segment. */ + if (write (target_file, first_data_section->s_vaddr, data_size) != data_size) + error ("cannot write new data section"); + + /* Skip over the Last Data Section and Copy until the .rwdi Section. */ + if (lseek (source_file, last_data_section->s_scnptr + +old_data_section_size, L_SET) == -1) + error ("cannot seek past data section"); + for (section = last_data_section+1; section != rwdi_section; section++) + if (section->s_scnptr != 0) + CopyData (target_file, source_file, LONG_ALIGN(section->s_size)); + /* Skip over the .rwdi Section and Copy Remainder of Source File. */ + if (lseek (source_file, source_file_offset_past_rwdi, L_SET) == -1) + error ("cannot seek past .rwdi section"); + while ((byte_count = read (source_file, buffer, sizeof (buffer))) > 0) + if (write (target_file, buffer, byte_count) != byte_count) + error ("cannot write data"); + /* Unrelocate .data references to Global Symbols. */ + for (section = first_data_section; section <= last_data_section; section++) + for (i = 0; i < section->s_nreloc; i++) + { + if (lseek (source_file, section->s_relptr + +i*sizeof (struct reloc)-delta_after_rwdi, L_SET) == -1) + error ("cannot seek to relocation info"); + if (read (source_file, &reloc_entry, sizeof (reloc_entry)) + != sizeof (reloc_entry)) + error ("cannot read reloc entry"); + if (lseek (source_file, reloc_entry.r_vaddr-section->s_vaddr + +section->s_scnptr, L_SET) == -1) + error ("cannot seek to data element"); + if (lseek (target_file, reloc_entry.r_vaddr-section->s_vaddr + +section->s_scnptr, L_SET) == -1) + error ("cannot seek to data element"); + if (read (source_file, buffer, 4) != 4) + error ("cannot read data element"); + if (write (target_file, buffer, 4) != 4) + error ("cannot write data element"); + } + + /* Correct virtual addresses in .blocks section. */ + if (blocks_section != (struct scnhdr *) 0) + { + dst_rec_t dst_record; + dst_rec_comp_unit_t *comp_unit; + unsigned short number_of_sections; + unsigned long section_base; + unsigned long section_offset = 0; + /* Find section tables and update section base addresses. */ + while (section_offset < blocks_section->s_size) + { + if (lseek (target_file, + blocks_section->s_scnptr+section_offset, L_SET) == -1) + error ("cannot seek to comp unit record"); + /* Handle pad records before the comp unit record. */ + if (read (target_file, &dst_record, DST_RECORD_HDR_SIZE) + != DST_RECORD_HDR_SIZE) + error ("cannot read dst record tag"); + if (dst_record.rec_type == dst_typ_pad) + section_offset += DST_RECORD_HDR_SIZE; + else if (dst_record.rec_type == dst_typ_comp_unit) + { + comp_unit = &dst_record.rec_data.comp_unit_; + if (read (target_file, comp_unit, sizeof (*comp_unit)) + != sizeof (*comp_unit)) + error ("cannot read comp unit record"); + if (lseek (target_file, blocks_section->s_scnptr + +section_offset +#if dst_version_major == 1 && dst_version_minor < 4 + +comp_unit->section_table +#else + +comp_unit->section_table.rel_offset +#endif + +DST_RECORD_HDR_SIZE, + L_SET) == -1) + error ("cannot seek to section table"); + if (read (target_file, &number_of_sections, sizeof (number_of_sections)) + != sizeof (number_of_sections)) + error ("cannot read section table size"); + for (i = 0; i < number_of_sections; i++) + { + if (read (target_file, §ion_base, sizeof (section_base)) + != sizeof (section_base)) + error ("cannot read section base value"); + if (section_base < first_changed_vaddr) + continue; + else if (section_base < old_rwdi_vaddr) + section_base += delta_before_rwdi; + else section_base += delta_after_rwdi; + if (lseek (target_file, -sizeof (section_base), L_INCR) == -1) + error ("cannot seek to section base value"); + if (write (target_file, §ion_base, sizeof (section_base)) + != sizeof (section_base)) + error ("cannot write section base"); + } + section_offset += comp_unit->data_size; + } + else error ("unexpected dst record type"); + } + } + + if (close (source_file) == -1) + error("cannot close source file"); + if (close (target_file) == -1) + error ("cannot close target file"); +} + + +static +CopyData (target_file, source_file, total_byte_count) + int target_file, source_file; + long total_byte_count; +{ + unsigned char buffer[4096]; + long byte_count; + while (total_byte_count > 0) + { + if (total_byte_count > sizeof (buffer)) + byte_count = sizeof (buffer); + else byte_count = total_byte_count; + if (read (source_file, buffer, byte_count) != byte_count) + error ("cannot read data"); + if (write (target_file, buffer, byte_count) != byte_count) + error ("cannot write data"); + total_byte_count -= byte_count; + } +} -- 2.39.2