-/* Execute AIXcoff files, for GDB.
- Copyright 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
- Derived from exec.c. Modified by IBM Corporation.
- Donated by IBM Corporation and Cygnus Support.
-
-This file is part of GDB.
-
-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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* xcoff-exec - deal with executing XCOFF files. */
-
-#include "defs.h"
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <fcntl.h>
-#include <string.h>
-#include <ctype.h>
-#include <sys/stat.h>
-
-#include "frame.h"
-#include "inferior.h"
-#include "target.h"
-#include "gdbcmd.h"
-#include "gdbcore.h"
-#include "symfile.h"
-#include "objfiles.h"
-
-#include "bfd.h"
-#include "xcoffsolib.h"
-
-/* Prototypes for local functions */
-
-static void
-file_command PARAMS ((char *, int));
-
-static void
-exec_close PARAMS ((int));
-
-struct vmap *
-map_vmap PARAMS ((bfd *, bfd *));
-
-struct section_table *exec_sections, *exec_sections_end;
-
-/* Whether to open exec and core files read-only or read-write. */
-
-int write_files = 0;
-
-extern int info_verbose;
-
-bfd *exec_bfd; /* needed by core.c */
-
-extern char *getenv();
-extern void add_syms_addr_command ();
-extern void symbol_file_command ();
-static void exec_files_info();
-
-struct vmap *vmap; /* current vmap */
-
-extern struct target_ops exec_ops;
-
-/* exec_close - done with exec file, clean up all resources. */
-
-static void
-exec_close(quitting)
-{
- register struct vmap *vp, *nxt;
- struct objfile *obj;
- int need_symtab_cleanup = 0;
-
- for (nxt = vmap; vp = nxt; )
- {
- nxt = vp->nxt;
-
- /* if there is an objfile associated with this bfd,
- free_objfile() will do proper cleanup of objfile *and* bfd. */
-
- if (vp->objfile)
- {
- free_objfile (vp->objfile);
- need_symtab_cleanup = 1;
- }
- else
- bfd_close(vp->bfd);
-
- /* FIXME: This routine is #if 0'd in symfile.c. What should we
- be doing here? Should we just free everything in
- vp->objfile->symtabs? Should free_objfile do that? */
- free_named_symtabs(vp->name);
- free(vp);
- }
-
- vmap = 0;
-
- /* exec_bfd was already closed (the exec file has a vmap entry). */
- exec_bfd = NULL;
-
- if (exec_ops.to_sections) {
- free (exec_ops.to_sections);
- exec_ops.to_sections = NULL;
- exec_ops.to_sections_end = NULL;
- }
-
- if (need_symtab_cleanup)
- clear_symtab_users ();
-}
-
-/*
- * exec_file_command - handle the "exec" command, &c.
- */
-void
-exec_file_command (filename, from_tty)
- char *filename;
- int from_tty;
-{
- target_preopen(from_tty);
-
- /* Remove any previous exec file. */
- unpush_target(&exec_ops);
-
- /* Now open and digest the file the user requested, if any. */
-
- if (filename)
- {
- char *scratch_pathname;
- int scratch_chan;
-
- filename = tilde_expand(filename);
- make_cleanup (free, filename);
-
- scratch_chan = openp(getenv("PATH"), 1, filename,
- write_files? O_RDWR: O_RDONLY, 0,
- &scratch_pathname);
- if (scratch_chan < 0)
- perror_with_name(filename);
-
- exec_bfd = bfd_fdopenr(scratch_pathname, gnutarget, scratch_chan);
- if (!exec_bfd)
- error("Could not open `%s' as an executable file: %s",
- scratch_pathname, bfd_errmsg(bfd_get_error ()));
-
- /* make sure we have an object file */
-
- if (!bfd_check_format(exec_bfd, bfd_object))
- error("\"%s\": not in executable format: %s.", scratch_pathname,
- bfd_errmsg(bfd_get_error ()));
-
- /* setup initial vmap */
-
- map_vmap (exec_bfd, 0);
- if (!vmap)
- error("Can't find the file sections in `%s': %s", exec_bfd->filename,
- bfd_errmsg(bfd_get_error ()));
-
- if (build_section_table (exec_bfd, &exec_ops.to_sections,
- &exec_ops.to_sections_end))
- error ("Can't find the file sections in `%s': %s", exec_bfd->filename,
- bfd_errmsg (bfd_get_error ()));
-
- /* make sure core, if present, matches */
- validate_files();
-
- push_target(&exec_ops);
-
- /* Tell display code(if any) about the changed file name. */
-
- if (exec_file_display_hook)
- (*exec_file_display_hook)(filename);
- }
- else
- {
- exec_close(0); /* just in case */
- if (from_tty)
- printf_unfiltered("No exec file now.\n");
- }
-}
-
-/* Set both the exec file and the symbol file, in one command. What a
- * novelty. Why did GDB go through four major releases before this
- * command was added?
- */
-static void
-file_command(arg, from_tty)
-char *arg; {
-
- exec_file_command(arg, from_tty);
- symbol_file_command(arg, from_tty);
-}
-
-/* Locate all mappable sections of a BFD file.
- table_pp_char is a char * to get it through bfd_map_over_sections;
- we cast it back to its proper type. */
-
-static void
-add_to_section_table (abfd, asect, table_pp_char)
- bfd *abfd;
- sec_ptr asect;
- char *table_pp_char;
-{
- struct section_table **table_pp = (struct section_table **)table_pp_char;
- flagword aflag;
-
- aflag = bfd_get_section_flags (abfd, asect);
- /* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */
- if (!(aflag & SEC_LOAD))
- return;
- if (0 == bfd_section_size (abfd, asect))
- return;
- (*table_pp)->bfd = abfd;
- (*table_pp)->the_bfd_section = asect;
- (*table_pp)->addr = bfd_section_vma (abfd, asect);
- (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
- (*table_pp)++;
-}
-
-int
-build_section_table (some_bfd, start, end)
- bfd *some_bfd;
- struct section_table **start, **end;
-{
- unsigned count;
-
- count = bfd_count_sections (some_bfd);
- if (count == 0)
- fatal ("aborting"); /* return 1? */
- if (*start)
- free (*start);
- *start = (struct section_table *) xmalloc (count * sizeof (**start));
- *end = *start;
- bfd_map_over_sections (some_bfd, add_to_section_table, (char *)end);
- if (*end > *start + count)
- fatal ("aborting");
- /* We could realloc the table, but it probably loses for most files. */
- return 0;
-}
-\f
-static void
-bfdsec_to_vmap(bf, sect, arg3)
- bfd *bf;
- sec_ptr sect;
- PTR arg3;
-{
- struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *)arg3;
- register struct vmap *vp, **vpp;
- register struct symtab *syms;
- bfd *arch = vmap_bfd->pbfd;
- vp = vmap_bfd->pvmap;
-
- if ((bfd_get_section_flags(bf, sect) & SEC_LOAD) == 0)
- return;
-
- if (STREQ(bfd_section_name(bf, sect), ".text"))
- {
- vp->tstart = 0;
- vp->tend = vp->tstart + bfd_section_size(bf, sect);
-
- /* When it comes to this adjustment value, in contrast to our previous
- belief shared objects should behave the same as the main load segment.
- This is the offset from the beginning of text section to the first
- real instruction. */
-
- vp->tadj = sect->filepos - bfd_section_vma(bf, sect);
- }
- else if (STREQ(bfd_section_name(bf, sect), ".data"))
- {
- vp->dstart = 0;
- vp->dend = vp->dstart + bfd_section_size(bf, sect);
- }
- else if (STREQ(bfd_section_name(bf, sect), ".bss")) /* FIXMEmgo */
- printf_unfiltered ("bss section in exec! Don't know what the heck to do!\n");
-}
-
-/* Make a vmap for the BFD "bf", which might be a member of the archive
- BFD "arch". Return the new vmap. */
-
-struct vmap *
-map_vmap (bf, arch)
- bfd *bf;
- bfd *arch;
-{
- struct vmap_and_bfd vmap_bfd;
- struct vmap *vp, **vpp;
- struct objfile *obj;
-
- vp = (void*) xmalloc (sizeof (*vp));
- memset (vp, '\0', sizeof (*vp));
- vp->nxt = 0;
- vp->bfd = bf;
- vp->name = bfd_get_filename(arch ? arch : bf);
- vp->member = arch ? bfd_get_filename(bf) : "";
-
- vmap_bfd.pbfd = arch;
- vmap_bfd.pvmap = vp;
- bfd_map_over_sections (bf, bfdsec_to_vmap, &vmap_bfd);
-
- /* find the end of the list, and append. */
- for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt)
- ;
- *vpp = vp;
-
- return vp;
-}
-
-/* Read or write the exec file.
-
- Args are address within exec file, address within gdb address-space,
- length, and a flag indicating whether to read or write.
-
- Result is a length:
-
- 0: We cannot handle this address and length.
- > 0: We have handled N bytes starting at this address.
- (If N == length, we did it all.) We might be able
- to handle more bytes beyond this length, but no
- promises.
- < 0: We cannot handle this address, but if somebody
- else handles (-N) bytes, we can start from there.
-
- The same routine is used to handle both core and exec files;
- we just tail-call it with more arguments to select between them. */
-
-int
-xfer_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target;
-{
- boolean res;
- struct section_table *p;
- CORE_ADDR nextsectaddr, memend;
- boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
-
- if (len <= 0)
- fatal ("aborting");
-
- memend = memaddr + len;
- xfer_fn = write? bfd_set_section_contents: bfd_get_section_contents;
- nextsectaddr = memend;
-
- for (p = target->to_sections; p < target->to_sections_end; p++)
- {
- if (p->addr <= memaddr)
- if (p->endaddr >= memend)
- {
- /* Entire transfer is within this section. */
- res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
- return (res != 0) ? len : 0;
- }
- else if (p->endaddr <= memaddr)
- {
- /* This section ends before the transfer starts. */
- continue;
- }
- else
- {
- /* This section overlaps the transfer. Just do half. */
- len = p->endaddr - memaddr;
- res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
- return (res != 0) ? len : 0;
- }
- else if (p->addr < nextsectaddr)
- nextsectaddr = p->addr;
- }
-
- if (nextsectaddr >= memend)
- return 0; /* We can't help */
- else
- return - (nextsectaddr - memaddr); /* Next boundary where we can help */
-}
-
-void
-print_section_info (t, abfd)
- struct target_ops *t;
- bfd *abfd;
-{
- struct section_table *p;
-
- /* FIXME-32x64: Need a version of print_address_numeric with field width. */
- printf_filtered ("\t`%s', ", bfd_get_filename(abfd));
- wrap_here (" ");
- printf_filtered ("file type %s.\n", bfd_get_target(abfd));
-
- for (p = t->to_sections; p < t->to_sections_end; p++) {
- printf_filtered ("\t%s",
- local_hex_string_custom ((unsigned long) p->addr, "08l"));
- printf_filtered (" - %s",
- local_hex_string_custom ((unsigned long) p->endaddr, "08l"));
- if (info_verbose)
- printf_filtered (" @ %s",
- local_hex_string_custom ((unsigned long) p->the_bfd_section->filepos, "08l"));
- printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section));
- if (p->bfd != abfd) {
- printf_filtered (" in %s", bfd_get_filename (p->bfd));
- }
- printf_filtered ("\n");
- }
-}
-
-
-static void
-exec_files_info (t)
- struct target_ops *t;
-{
- register struct vmap *vp = vmap;
-
- print_section_info (t, exec_bfd);
-
- if (!vp)
- return;
-
- printf_unfiltered("\tMapping info for file `%s'.\n", vp->name);
-
- printf_unfiltered("\t %8.8s %8.8s %8.8s %8.8s %8.8s %s\n",
- "tstart", "tend", "dstart", "dend", "section", "file(member)");
-
- for (; vp; vp = vp->nxt)
- printf_unfiltered("\t0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x %s%s%s%s\n",
- vp->tstart,
- vp->tend,
- vp->dstart,
- vp->dend,
- vp->name,
- *vp->member ? "(" : "",
- vp->member,
- *vp->member ? ")" : "");
-}
-
-#ifdef DAMON
-/* Damon's implementation of set_section_command! It is based on the sex member
- (which is a section pointer from vmap) of vmap.
- We will not have multiple vmap entries (one for each section), rather transmit
- text and data base offsets and fix them at the same time. Elimination of sex
- entry in vmap make this function obsolute, use the one from exec.c.
- Need further testing!! FIXMEmgo. */
-
-static void
-set_section_command(args, from_tty)
-char *args;
-{
- register struct vmap *vp = vmap;
- char *secname;
- unsigned seclen;
- unsigned long secaddr;
- char secprint[100];
- long offset;
-
- if (args == 0)
- error("Must specify section name and its virtual address");
-
- /* Parse out section name */
- for (secname = args; !isspace(*args); args++)
- ;
- seclen = args - secname;
-
- /* Parse out new virtual address */
- secaddr = parse_and_eval_address(args);
-
- for (vp = vmap; vp; vp = vp->nxt) {
- if (!strncmp(secname
- , bfd_section_name(vp->bfd, vp->sex), seclen)
- && bfd_section_name(vp->bfd, vp->sex)[seclen] == '\0') {
- offset = secaddr - vp->tstart;
- vp->tstart += offset;
- vp->tend += offset;
- exec_files_info();
- return;
- }
- }
-
- if (seclen >= sizeof(secprint))
- seclen = sizeof(secprint) - 1;
- strncpy(secprint, secname, seclen);
- secprint[seclen] = '\0';
- error("Section %s not found", secprint);
-}
-#else
-static void
-set_section_command (args, from_tty)
- char *args;
- int from_tty;
-{
- struct section_table *p;
- char *secname;
- unsigned seclen;
- unsigned long secaddr;
- char secprint[100];
- long offset;
-
- if (args == 0)
- error ("Must specify section name and its virtual address");
-
- /* Parse out section name */
- for (secname = args; !isspace(*args); args++) ;
- seclen = args - secname;
-
- /* Parse out new virtual address */
- secaddr = parse_and_eval_address (args);
-
- for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) {
- if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen)
- && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') {
- offset = secaddr - p->addr;
- p->addr += offset;
- p->endaddr += offset;
- if (from_tty)
- exec_files_info(&exec_ops);
- return;
- }
- }
- if (seclen >= sizeof (secprint))
- seclen = sizeof (secprint) - 1;
- strncpy (secprint, secname, seclen);
- secprint[seclen] = '\0';
- error ("Section %s not found", secprint);
-}
-
-#endif /* !DAMON */
-
-struct target_ops exec_ops = {
- "exec", "Local exec file",
- "Use an executable file as a target.\n\
-Specify the filename of the executable file.",
- exec_file_command, exec_close, /* open, close */
- find_default_attach, 0, 0, 0, /* attach, detach, resume, wait, */
- 0, 0, /* fetch_registers, store_registers, */
- 0, /* prepare_to_store */
- xfer_memory, exec_files_info,
- 0, 0, /* insert_breakpoint, remove_breakpoint, */
- 0, 0, 0, 0, 0, /* terminal stuff */
- 0, 0, /* kill, load */
- 0, /* lookup sym */
- find_default_create_inferior,
- 0, /* mourn_inferior */
- 0, /* can_run */
- 0, /* notice_signals */
- file_stratum, 0, /* next */
- 0, 1, 0, 0, 0, /* all mem, mem, stack, regs, exec */
- 0, 0, /* section pointers */
- OPS_MAGIC, /* Always the last thing */
-};
-
-void
-_initialize_exec()
-{
-
- add_com("file", class_files, file_command,
- "Use FILE as program to be debugged.\n\
-It is read for its symbols, for getting the contents of pure memory,\n\
-and it is the program executed when you use the `run' command.\n\
-If FILE cannot be found as specified, your execution directory path\n\
-($PATH) is searched for a command of that name.\n\
-No arg means to have no executable file and no symbols.");
-
- add_com("exec-file", class_files, exec_file_command,
- "Use FILE as program for getting contents of pure memory.\n\
-If FILE cannot be found as specified, your execution directory path\n\
-is searched for a command of that name.\n\
-No arg means have no executable file.");
-
- add_com("section", class_files, set_section_command,
- "Change the base address of section SECTION of the exec file to ADDR.\n\
-This can be used if the exec file does not contain section addresses,\n\
-(such as in the a.out format), or when the addresses specified in the\n\
-file itself are wrong. Each section must be changed separately. The\n\
-``info files'' command lists all the sections and their addresses.");
-
- add_target(&exec_ops);
-}
projects / deliverable / binutils-gdb.git / blobdiff