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authorK. Richard Pixley <rich@cygnus>1991-03-28 16:28:29 +0000
committerK. Richard Pixley <rich@cygnus>1991-03-28 16:28:29 +0000
commitdd3b648e8b12ceb7bfce66e7f179b671403aea9c (patch)
tree91119a0f4943acc9293cd8baba06943621b6e6c7 /gdb/stuff.c
parentbd5635a1e2b38ee8432fcdaa6456079191375277 (diff)
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Johns release
Diffstat (limited to 'gdb/stuff.c')
-rw-r--r--gdb/stuff.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/gdb/stuff.c b/gdb/stuff.c
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+++ b/gdb/stuff.c
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+/* Program to stuff files into a specially prepared space in kdb.
+ Copyright (C) 1986, 1989, 1991 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* Written 13-Mar-86 by David Bridgham. */
+
+#include <stdio.h>
+#include <a.out.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/file.h>
+#include <varargs.h>
+
+extern char *sys_errlist[];
+
+main (argc, argv)
+ int argc;
+ char *argv[];
+{
+ register char *cp;
+ char *outfile;
+ register int i;
+ int offset;
+ int out_fd, in_fd;
+ struct stat stat_buf;
+ int size, pad;
+ char buf[1024];
+ static char zeros[4] = {0};
+
+ if (argc < 4)
+ err("Not enough arguments\nUsage: %s -o kdb file1 file2 ...\n",
+ argv[0]);
+
+ outfile = 0;
+ for (i = 1; i < argc; i++)
+ {
+ if (strcmp (argv[i], "-o") == 0)
+ outfile = argv[++i];
+ }
+ if (outfile == 0)
+ err("Output file not specified\n");
+
+ offset = get_offset (outfile, "_heap");
+
+ out_fd = open (outfile, O_WRONLY);
+ if (out_fd < 0)
+ err ("Error opening %s for write: %s\n", outfile, sys_errlist[errno]);
+ if (lseek (out_fd, offset, 0) < 0)
+ err ("Error seeking to heap in %s: %s\n", outfile, sys_errlist[errno]);
+
+ /* For each file listed on the command line, write it into the
+ * 'heap' of the output file. Make sure to skip the arguments
+ * that name the output file. */
+ for (i = 1; i < argc; i++)
+ {
+ if (strcmp (argv[i], "-o") == 0)
+ continue;
+ if ((in_fd = open (argv[i], O_RDONLY)) < 0)
+ err ("Error opening %s for read: %s\n", argv[i], sys_errlist[errno]);
+ if (fstat (in_fd, &stat_buf) < 0)
+ err ("Error stat'ing %s: %s\n", argv[i], sys_errlist[errno]);
+ size = strlen (argv[i]);
+ pad = 4 - (size & 3);
+ size += pad + stat_buf.st_size + sizeof (int);
+ write (out_fd, &size, sizeof (int));
+ write (out_fd, argv[i], strlen (argv[i]));
+ write (out_fd, zeros, pad);
+ while ((size = read (in_fd, buf, sizeof (buf))) > 0)
+ write (out_fd, buf, size);
+ close (in_fd);
+ }
+ size = 0;
+ write (out_fd, &size, sizeof (int));
+ close (out_fd);
+ return (0);
+}
+
+/* Read symbol table from file and returns the offset into the file
+ * where symbol sym_name is located. If error, print message and
+ * exit. */
+get_offset (file, sym_name)
+ char *file;
+ char *sym_name;
+{
+ int f;
+ struct exec file_hdr;
+ struct nlist *symbol_table;
+ int size;
+ char *strings;
+
+ f = open (file, O_RDONLY);
+ if (f < 0)
+ err ("Error opening %s: %s\n", file, sys_errlist[errno]);
+ if (read (f, &file_hdr, sizeof (file_hdr)) < 0)
+ err ("Error reading exec structure: %s\n", sys_errlist[errno]);
+ if (N_BADMAG (file_hdr))
+ err ("File %s not an a.out file\n", file);
+
+ /* read in symbol table */
+ if ((symbol_table = (struct nlist *)malloc (file_hdr.a_syms)) == 0)
+ err ("Couldn't allocate space for symbol table\n");
+ if (lseek (f, N_SYMOFF (file_hdr), 0) == -1)
+ err ("lseek error: %s\n", sys_errlist[errno]);
+ if (read (f, symbol_table, file_hdr.a_syms) == -1)
+ err ("Error reading symbol table from %s: %s\n", file, sys_errlist[errno]);
+
+ /* read in string table */
+ if (read (f, &size, 4) == -1)
+ err ("reading string table size: %s\n", sys_errlist[errno]);
+ if ((strings = (char *)malloc (size)) == 0)
+ err ("Couldn't allocate memory for string table\n");
+ if (read (f, strings, size - 4) == -1)
+ err ("reading string table: %s\n", sys_errlist[errno]);
+
+ /* Find the core address at which the first byte of kdb text segment
+ should be loaded into core when kdb is run. */
+ origin = find_symbol ("_etext", symbol_table, file_hdr.a_syms, strings)
+ - file_hdr.a_text;
+ /* Find the core address at which the heap will appear. */
+ coreaddr = find_symbol (sym_name, symbol_table, file_hdr.a_syms, strings);
+ /* Return address in file of the heap data space. */
+ return (N_TXTOFF (file_hdr) + core_addr - origin);
+}
+
+find_symbol (sym_name, symbol_table, length, strings)
+ char *sym_name;
+ struct nlist *symbol_table;
+ int length;
+ char *strings;
+{
+ register struct nlist *sym;
+
+ /* Find symbol in question */
+ for (sym = symbol_table;
+ sym != (struct nlist *)((char *)symbol_table + length);
+ sym++)
+ {
+ if ((sym->n_type & N_TYPE) != N_DATA) continue;
+ if (sym->n_un.n_strx == 0) continue;
+ if (strcmp (sym_name, strings + sym->n_un.n_strx - 4) == 0)
+ return sym->n_value;
+ }
+ err ("Data symbol %s not found in %s\n", sym_name, file);
+}
+
+/* VARARGS */
+void
+err (va_alist)
+ va_dcl
+{
+ va_list args;
+ char *string;
+
+ va_start (args);
+ string = va_arg (args, char *);
+ vfprintf (stderr, string, args);
+ va_end (args);
+ exit (-1);
+}