1 /* Program to stuff files into a specially prepared space in kdb.
2 Copyright (C) 1986, 1989 Free Software Foundation, Inc.
4 This file is part of GDB.
6 GDB is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
11 GDB is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GDB; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* Written 13-Mar-86 by David Bridgham. */
24 #include <sys/types.h>
28 extern char *sys_errlist[];
43 static char zeros[4] = {0};
46 err("Not enough arguments\nUsage: %s -o kdb file1 file2 ...\n",
50 for (i = 1; i < argc; i++)
52 if (strcmp (argv[i], "-o") == 0)
56 err("Output file not specified\n");
58 offset = get_offset (outfile, "_heap");
60 out_fd = open (outfile, O_WRONLY);
62 err ("Error opening %s for write: %s\n", outfile, sys_errlist[errno]);
63 if (lseek (out_fd, offset, 0) < 0)
64 err ("Error seeking to heap in %s: %s\n", outfile, sys_errlist[errno]);
66 /* For each file listed on the command line, write it into the
67 * 'heap' of the output file. Make sure to skip the arguments
68 * that name the output file. */
69 for (i = 1; i < argc; i++)
71 if (strcmp (argv[i], "-o") == 0)
73 if ((in_fd = open (argv[i], O_RDONLY)) < 0)
74 err ("Error opening %s for read: %s\n", argv[i], sys_errlist[errno]);
75 if (fstat (in_fd, &stat_buf) < 0)
76 err ("Error stat'ing %s: %s\n", argv[i], sys_errlist[errno]);
77 size = strlen (argv[i]);
79 size += pad + stat_buf.st_size + sizeof (int);
80 write (out_fd, &size, sizeof (int));
81 write (out_fd, argv[i], strlen (argv[i]));
82 write (out_fd, zeros, pad);
83 while ((size = read (in_fd, buf, sizeof (buf))) > 0)
84 write (out_fd, buf, size);
88 write (out_fd, &size, sizeof (int));
93 /* Read symbol table from file and returns the offset into the file
94 * where symbol sym_name is located. If error, print message and
96 get_offset (file, sym_name)
101 struct exec file_hdr;
102 struct nlist *symbol_table;
106 f = open (file, O_RDONLY);
108 err ("Error opening %s: %s\n", file, sys_errlist[errno]);
109 if (read (f, &file_hdr, sizeof (file_hdr)) < 0)
110 err ("Error reading exec structure: %s\n", sys_errlist[errno]);
111 if (N_BADMAG (file_hdr))
112 err ("File %s not an a.out file\n", file);
114 /* read in symbol table */
115 if ((symbol_table = (struct nlist *)malloc (file_hdr.a_syms)) == 0)
116 err ("Couldn't allocate space for symbol table\n");
117 if (lseek (f, N_SYMOFF (file_hdr), 0) == -1)
118 err ("lseek error: %s\n", sys_errlist[errno]);
119 if (read (f, symbol_table, file_hdr.a_syms) == -1)
120 err ("Error reading symbol table from %s: %s\n", file, sys_errlist[errno]);
122 /* read in string table */
123 if (read (f, &size, 4) == -1)
124 err ("reading string table size: %s\n", sys_errlist[errno]);
125 if ((strings = (char *)malloc (size)) == 0)
126 err ("Couldn't allocate memory for string table\n");
127 if (read (f, strings, size - 4) == -1)
128 err ("reading string table: %s\n", sys_errlist[errno]);
130 /* Find the core address at which the first byte of kdb text segment
131 should be loaded into core when kdb is run. */
132 origin = find_symbol ("_etext", symbol_table, file_hdr.a_syms, strings)
134 /* Find the core address at which the heap will appear. */
135 coreaddr = find_symbol (sym_name, symbol_table, file_hdr.a_syms, strings);
136 /* Return address in file of the heap data space. */
137 return (N_TXTOFF (file_hdr) + core_addr - origin);
140 find_symbol (sym_name, symbol_table, length, strings)
142 struct nlist *symbol_table;
146 register struct nlist *sym;
148 /* Find symbol in question */
149 for (sym = symbol_table;
150 sym != (struct nlist *)((char *)symbol_table + length);
153 if ((sym->n_type & N_TYPE) != N_DATA) continue;
154 if (sym->n_un.n_strx == 0) continue;
155 if (strcmp (sym_name, strings + sym->n_un.n_strx - 4) == 0)
158 err ("Data symbol %s not found in %s\n", sym_name, file);
161 err (msg, a1, a2, a3)
165 fprintf (stderr, msg, a1, a2, a3);