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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "frame.h"
#include <sys/user.h> /* After a.out.h */
#include <sys/file.h>
-#include <sys/stat.h>
+#include "gdb_stat.h"
#include <errno.h>
}
\f
/* Work with core dump and executable files, for GDB.
- This code would be in core.c if it weren't machine-dependent. */
+ This code would be in corefile.c if it weren't machine-dependent. */
/* Structure to describe the chain of shared libraries used
by the execfile.
else if (from_tty)
printf ("No core file now.\n");
}
+
+#if 0
+/* Work with core dump and executable files, for GDB.
+ This code would be in corefile.c if it weren't machine-dependent. */
+
+/* Structure to describe the chain of shared libraries used
+ by the execfile.
+ e.g. prog shares Xt which shares X11 which shares c. */
+
+struct shared_library {
+ struct exec_header header;
+ char name[SHLIBLEN];
+ CORE_ADDR text_start; /* CORE_ADDR of 1st byte of text, this file */
+ long data_offset; /* offset of data section in file */
+ int chan; /* file descriptor for the file */
+ struct shared_library *shares; /* library this one shares */
+};
+static struct shared_library *shlib = 0;
+
+/* Hook for `exec_file_command' command to call. */
+
+extern void (*exec_file_display_hook) ();
+
+static CORE_ADDR unshared_text_start;
+
+/* extended header from exec file (for shared library info) */
+
+static struct exec_header exec_header;
+
+void
+exec_file_command (filename, from_tty)
+ char *filename;
+ int from_tty;
+{
+ int val;
+
+ /* Eliminate all traces of old exec file.
+ Mark text segment as empty. */
+
+ if (execfile)
+ free (execfile);
+ execfile = 0;
+ data_start = 0;
+ data_end -= exec_data_start;
+ text_start = 0;
+ unshared_text_start = 0;
+ text_end = 0;
+ exec_data_start = 0;
+ exec_data_end = 0;
+ if (execchan >= 0)
+ close (execchan);
+ execchan = -1;
+ if (shlib) {
+ close_shared_library(shlib);
+ shlib = 0;
+ }
+
+ /* Now open and digest the file the user requested, if any. */
+
+ if (filename)
+ {
+ filename = tilde_expand (filename);
+ make_cleanup (free, filename);
+
+ execchan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
+ &execfile);
+ if (execchan < 0)
+ perror_with_name (filename);
+
+ {
+ struct stat st_exec;
+
+#ifdef HEADER_SEEK_FD
+ HEADER_SEEK_FD (execchan);
+#endif
+
+ val = myread (execchan, &exec_header, sizeof exec_header);
+ exec_aouthdr = exec_header.a_exec;
+
+ if (val < 0)
+ perror_with_name (filename);
+
+ text_start = 0x8000;
+
+ /* Look for shared library if needed */
+ if (exec_header.a_exec.a_magic & MF_USES_SL)
+ shlib = open_shared_library(exec_header.a_shlibname, text_start);
+
+ text_offset = N_TXTOFF (exec_aouthdr);
+ exec_data_offset = N_TXTOFF (exec_aouthdr) + exec_aouthdr.a_text;
+
+ if (shlib) {
+ unshared_text_start = shared_text_end(shlib) & ~0x7fff;
+ stack_start = shlib->header.a_exec.a_sldatabase;
+ stack_end = STACK_END_ADDR;
+ } else
+ unshared_text_start = 0x8000;
+ text_end = unshared_text_start + exec_aouthdr.a_text;
+
+ exec_data_start = unshared_text_start + exec_aouthdr.a_text;
+ exec_data_end = exec_data_start + exec_aouthdr.a_data;
+
+ data_start = exec_data_start;
+ data_end += exec_data_start;
+
+ fstat (execchan, &st_exec);
+ exec_mtime = st_exec.st_mtime;
+ }
+
+ validate_files ();
+ }
+ else if (from_tty)
+ printf ("No exec file now.\n");
+
+ /* Tell display code (if any) about the changed file name. */
+ if (exec_file_display_hook)
+ (*exec_file_display_hook) (filename);
+}
+#endif
+
+#if 0
+/* Read from the program's memory (except for inferior processes).
+ This function is misnamed, since it only reads, never writes; and
+ since it will use the core file and/or executable file as necessary.
+
+ It should be extended to write as well as read, FIXME, for patching files.
+
+ Return 0 if address could be read, EIO if addresss out of bounds. */
+
+int
+xfer_core_file (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ register int i;
+ register int val;
+ int xferchan;
+ char **xferfile;
+ int fileptr;
+ int returnval = 0;
+
+ while (len > 0)
+ {
+ xferfile = 0;
+ xferchan = 0;
+
+ /* Determine which file the next bunch of addresses reside in,
+ and where in the file. Set the file's read/write pointer
+ to point at the proper place for the desired address
+ and set xferfile and xferchan for the correct file.
+
+ If desired address is nonexistent, leave them zero.
+
+ i is set to the number of bytes that can be handled
+ along with the next address.
+
+ We put the most likely tests first for efficiency. */
+
+ /* Note that if there is no core file
+ data_start and data_end are equal. */
+ if (memaddr >= data_start && memaddr < data_end)
+ {
+ i = min (len, data_end - memaddr);
+ fileptr = memaddr - data_start + data_offset;
+ xferfile = &corefile;
+ xferchan = corechan;
+ }
+ /* Note that if there is no core file
+ stack_start and stack_end define the shared library data. */
+ else if (memaddr >= stack_start && memaddr < stack_end)
+ {
+ if (corechan < 0) {
+ struct shared_library *lib;
+ for (lib = shlib; lib; lib = lib->shares)
+ if (memaddr >= lib->header.a_exec.a_sldatabase &&
+ memaddr < lib->header.a_exec.a_sldatabase +
+ lib->header.a_exec.a_data)
+ break;
+ if (lib) {
+ i = min (len, lib->header.a_exec.a_sldatabase +
+ lib->header.a_exec.a_data - memaddr);
+ fileptr = lib->data_offset + memaddr -
+ lib->header.a_exec.a_sldatabase;
+ xferfile = execfile;
+ xferchan = lib->chan;
+ }
+ } else {
+ i = min (len, stack_end - memaddr);
+ fileptr = memaddr - stack_start + stack_offset;
+ xferfile = &corefile;
+ xferchan = corechan;
+ }
+ }
+ else if (corechan < 0
+ && memaddr >= exec_data_start && memaddr < exec_data_end)
+ {
+ i = min (len, exec_data_end - memaddr);
+ fileptr = memaddr - exec_data_start + exec_data_offset;
+ xferfile = &execfile;
+ xferchan = execchan;
+ }
+ else if (memaddr >= text_start && memaddr < text_end)
+ {
+ struct shared_library *lib;
+ for (lib = shlib; lib; lib = lib->shares)
+ if (memaddr >= lib->text_start &&
+ memaddr < lib->text_start + lib->header.a_exec.a_text)
+ break;
+ if (lib) {
+ i = min (len, lib->header.a_exec.a_text +
+ lib->text_start - memaddr);
+ fileptr = memaddr - lib->text_start + text_offset;
+ xferfile = &execfile;
+ xferchan = lib->chan;
+ } else {
+ i = min (len, text_end - memaddr);
+ fileptr = memaddr - unshared_text_start + text_offset;
+ xferfile = &execfile;
+ xferchan = execchan;
+ }
+ }
+ else if (memaddr < text_start)
+ {
+ i = min (len, text_start - memaddr);
+ }
+ else if (memaddr >= text_end
+ && memaddr < (corechan >= 0? data_start : exec_data_start))
+ {
+ i = min (len, data_start - memaddr);
+ }
+ else if (corechan >= 0
+ && memaddr >= data_end && memaddr < stack_start)
+ {
+ i = min (len, stack_start - memaddr);
+ }
+ else if (corechan < 0 && memaddr >= exec_data_end)
+ {
+ i = min (len, - memaddr);
+ }
+ else if (memaddr >= stack_end && stack_end != 0)
+ {
+ i = min (len, - memaddr);
+ }
+ else
+ {
+ /* Address did not classify into one of the known ranges.
+ This shouldn't happen; we catch the endpoints. */
+ fatal ("Internal: Bad case logic in xfer_core_file.");
+ }
+
+ /* Now we know which file to use.
+ Set up its pointer and transfer the data. */
+ if (xferfile)
+ {
+ if (*xferfile == 0)
+ if (xferfile == &execfile)
+ error ("No program file to examine.");
+ else
+ error ("No core dump file or running program to examine.");
+ val = lseek (xferchan, fileptr, 0);
+ if (val < 0)
+ perror_with_name (*xferfile);
+ val = myread (xferchan, myaddr, i);
+ if (val < 0)
+ perror_with_name (*xferfile);
+ }
+ /* If this address is for nonexistent memory,
+ read zeros if reading, or do nothing if writing.
+ Actually, we never right. */
+ else
+ {
+ memset (myaddr, '\0', i);
+ returnval = EIO;
+ }
+
+ memaddr += i;
+ myaddr += i;
+ len -= i;
+ }
+ return returnval;
+}
+#endif
projects / deliverable / binutils-gdb.git / blobdiff