-/* 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 <sys/ldr.h>
-
-#include "frame.h"
-#include "inferior.h"
-#include "target.h"
-#include "gdbcmd.h"
-#include "gdbcore.h"
-#include "symfile.h"
-
-#include "libbfd.h" /* BFD internals (sigh!) FIXME */
-
-/* Prototypes for local functions */
-
-static void
-file_command PARAMS ((char *, int));
-
-static void
-exec_close PARAMS ((int));
-
-struct section_table *exec_sections, *exec_sections_end;
-
-#define eq(s0, s1) !strcmp(s0, s1)
-
-/* 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 child_create_inferior (), child_attach ();
-extern void add_syms_addr_command ();
-extern void symbol_file_command ();
-static void exec_files_info();
-extern struct objfile *lookup_objfile_bfd ();
-
-/*
- * the vmap struct is used to describe the virtual address space of
- * the target we are manipulating. The first entry is always the "exec"
- * file. Subsequent entries correspond to other objects that are
- * mapped into the address space of a process created from the "exec" file.
- * These are either in response to exec()ing the file, in which case all
- * shared libraries are loaded, or a "load" system call, followed by the
- * user's issuance of a "load" command.
- */
-struct vmap {
- struct vmap *nxt; /* ^ to next in chain */
- bfd *bfd; /* BFD for mappable object library */
- char *name; /* ^ to object file name */
- char *member; /* ^ to member name */
- CORE_ADDR tstart; /* virtual addr where member is mapped */
- CORE_ADDR tend; /* virtual upper bound of member */
- CORE_ADDR tadj; /* heuristically derived adjustment */
- CORE_ADDR dstart; /* virtual address of data start */
- CORE_ADDR dend; /* vitrual address of data end */
-};
-
-
-struct vmap_and_bfd {
- bfd *pbfd;
- struct vmap *pvmap;
-};
-
-static 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;
-
- 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 (obj = lookup_objfile_bfd (vp->bfd))
- free_objfile (obj);
- else
- bfd_close(vp->bfd);
-
- free_named_symtabs(vp->name);
- free(vp);
- }
-
- vmap = 0;
-
- if (exec_bfd) {
- bfd_close (exec_bfd);
- exec_bfd = NULL;
- }
- if (exec_ops.to_sections) {
- free (exec_ops.to_sections);
- exec_ops.to_sections = NULL;
- exec_ops.to_sections_end = NULL;
- }
-}
-
-/*
- * exec_file_command - handle the "exec" command, &c.
- */
-void
-exec_file_command(filename, from_tty)
-char *filename;
-{
- 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, NULL, scratch_chan);
- if (!exec_bfd)
- error("Could not open `%s' as an executable file: %s"
- , scratch_pathname, bfd_errmsg(bfd_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_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_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_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("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)->sec_ptr = 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)
- abort(); /* 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)
- abort();
- /* We could realloc the table, but it probably loses for most files. */
- return 0;
-}
-
-/*
- * lookup_symtab_bfd - find if we currently have any symbol tables from bfd
- */
-struct objfile *
-lookup_objfile_bfd(bfd *bfd) {
- register struct objfile *s;
-
- for (s = object_files; s; s = s->next)
- if (s->obfd == bfd)
- return s;
- return 0;
-}
-
-
-void
-sex_to_vmap(bfd *bf, sec_ptr sex, struct vmap_and_bfd *vmap_bfd)
-{
- register struct vmap *vp, **vpp;
- register struct symtab *syms;
- bfd *arch = vmap_bfd->pbfd;
- vp = vmap_bfd->pvmap;
-
- if ((bfd_get_section_flags(bf, sex) & SEC_LOAD) == 0)
- return;
-
- if (!strcmp(bfd_section_name(bf, sex), ".text")) {
- vp->tstart = 0;
- vp->tend = vp->tstart + bfd_section_size(bf, sex);
-
- /* 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 = sex->filepos - bfd_section_vma(bf, sex);
- }
-
- else if (!strcmp(bfd_section_name(bf, sex), ".data")) {
- vp->dstart = 0;
- vp->dend = vp->dstart + bfd_section_size(bf, sex);
- }
-
- else if (!strcmp(bfd_section_name(bf, sex), ".bss")) /* FIXMEmgo */
- printf ("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". If we have not yet read in symbols for this file, do so. */
-
-map_vmap (bfd *bf, bfd *arch)
-{
- struct vmap_and_bfd vmap_bfd;
- struct vmap *vp, **vpp;
- struct objfile *obj;
-
- vp = (void*) xmalloc (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, sex_to_vmap, &vmap_bfd);
-
- obj = lookup_objfile_bfd (bf);
- if (exec_bfd && !obj) {
- obj = allocate_objfile (bf, bfd_get_filename (bf), 0);
- syms_from_objfile (obj, 0, 0, 0);
- }
-
- /* find the end of the list, and append. */
- for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt)
- ;
- *vpp = vp;
-}
-
-
-#define FASTER_MSYMBOL_RELOCATION 1
-
-#ifdef FASTER_MSYMBOL_RELOCATION
-
-/* Used to relocate an object file's minimal symbols. */
-
-static void
-reloc_objfile_msymbols (objf, addr)
-struct objfile *objf;
-CORE_ADDR addr;
-{
- register struct minimal_symbol *msymbol;
- int ii;
-
- for (msymbol = objf->msymbols, ii=0;
- msymbol && ii < objf->minimal_symbol_count; ++msymbol, ++ii)
-
- if (msymbol->address < TEXT_SEGMENT_BASE)
- msymbol->address += addr;
-}
-
-#else /* !FASTER_MSYMBOL_RELOCATION */
-
-/* Called via iterate_over_msymbols to relocate minimal symbols */
-
-static int
-relocate_minimal_symbol (objfile, msymbol, arg1, arg2, arg3)
- struct objfile *objfile;
- struct minimal_symbol *msymbol;
- PTR arg1;
- PTR arg2;
- PTR arg3;
-{
- if (msymbol->address < TEXT_SEGMENT_BASE)
- msymbol -> address += (int) arg1;
-
- /* return 0, otherwise `iterate_over_msymbols()' will stop at the
- first iteration. */
- return 0;
-}
-#endif /* FASTER_MSYMBOL_RELOCATION */
-
-/* true, if symbol table and minimal symbol table are relocated. */
-
-int symtab_relocated = 0;
-
-
-/* vmap_symtab - handle symbol translation on vmapping */
-
-vmap_symtab(vp, old_start, vip)
-register struct vmap *vp;
-CORE_ADDR old_start;
-struct stat *vip;
-{
- register struct symtab *s;
- register struct objfile *objfile;
-
- /*
- * for each symbol table generated from the vp->bfd
- */
- for (objfile = object_files; objfile != NULL; objfile = objfile -> next)
- {
- for (s = objfile -> symtabs; s != NULL; s = s -> next) {
-
- /* skip over if this is not relocatable and doesn't have a line table */
- if (s->nonreloc && !LINETABLE (s))
- continue;
-
- /* matching the symbol table's BFD and the *vp's BFD is hairy.
- exec_file creates a seperate BFD for possibly the
- same file as symbol_file.FIXME ALL THIS MUST BE RECTIFIED. */
-
- if (objfile->obfd == vp->bfd) {
- /* if they match, we luck out. */
- ;
- } else if (vp->member[0]) {
- /* no match, and member present, not this one. */
- continue;
- } else {
- struct stat si;
- FILE *io;
-
- /*
- * no match, and no member. need to be sure.
- */
- io = bfd_cache_lookup(objfile->obfd);
- if (!io)
- fatal("cannot find BFD's iostream for sym");
- /*
- * see if we are referring to the same file
- */
- if (fstat(fileno(io), &si) < 0)
- fatal("cannot fstat BFD for sym");
-
- if (si.st_dev != vip->st_dev
- || si.st_ino != vip->st_ino)
- continue;
- }
-
- if (vp->tstart != old_start) {
-
- /* Once we find a relocation base address for one of the symtabs
- in this objfile, it will be the same for all symtabs in this
- objfile. Clean this algorithm. FIXME. */
-
- for (; s; s = s->next)
- if (!s->nonreloc || LINETABLE(s))
- vmap_symtab_1(s, vp, old_start);
-
-#ifdef FASTER_MSYMBOL_RELOCATION
- /* we can rely on the fact that at least one symtab in this objfile
- will get relocated. Thus, we can be sure that minimal symbol
- vector is guaranteed for relocation. */
-
- reloc_objfile_msymbols (objfile, vp->tstart - old_start);
-#endif
- break;
- }
- }
- }
-
- if (vp->tstart != old_start) {
-#ifndef FASTER_MSYMBOL_RELOCATION
- (void) iterate_over_msymbols (relocate_minimal_symbol,
- (PTR) (vp->tstart - old_start),
- (PTR) NULL, (PTR) NULL);
-#endif
-
- /* breakpoints need to be relocated as well. */
- fixup_breakpoints (0, TEXT_SEGMENT_BASE, vp->tstart - old_start);
- }
-
- symtab_relocated = 1;
-}
-
-
-vmap_symtab_1(s, vp, old_start)
-register struct symtab *s;
-register struct vmap *vp;
-CORE_ADDR old_start;
-{
- register int i, j;
- int len, blen;
- register struct linetable *l;
- struct blockvector *bv;
- register struct block *b;
- int depth;
- register ulong reloc, dreloc;
-
- if ((reloc = vp->tstart - old_start) == 0)
- return;
-
- dreloc = vp->dstart; /* data relocation */
-
- /*
- * The line table must be relocated. This is only present for
- * .text sections, so only vp->text type maps need be considered.
- */
- l = LINETABLE (s);
- if (l) {
- len = l->nitems;
- for (i = 0; i < len; i++)
- l->item[i].pc += reloc;
- }
-
- /* if this symbol table is not relocatable, only line table should
- be relocated and the rest ignored. */
- if (s->nonreloc)
- return;
-
- bv = BLOCKVECTOR(s);
- len = BLOCKVECTOR_NBLOCKS(bv);
-
- for (i = 0; i < len; i++) {
- b = BLOCKVECTOR_BLOCK(bv, i);
-
- BLOCK_START(b) += reloc;
- BLOCK_END(b) += reloc;
-
- blen = BLOCK_NSYMS(b);
- for (j = 0; j < blen; j++) {
- register struct symbol *sym;
-
- sym = BLOCK_SYM(b, j);
- switch (SYMBOL_NAMESPACE(sym)) {
- case STRUCT_NAMESPACE:
- case UNDEF_NAMESPACE:
- continue;
-
- case LABEL_NAMESPACE:
- case VAR_NAMESPACE:
- break;
- }
-
- switch (SYMBOL_CLASS(sym)) {
- case LOC_CONST:
- case LOC_CONST_BYTES:
- case LOC_LOCAL:
- case LOC_REGISTER:
- case LOC_ARG:
- case LOC_LOCAL_ARG:
- case LOC_REF_ARG:
- case LOC_REGPARM:
- case LOC_TYPEDEF:
- continue;
-
-#ifdef FIXME
- case LOC_EXTERNAL:
-#endif
- case LOC_LABEL:
- SYMBOL_VALUE_ADDRESS(sym) += reloc;
- break;
-
- case LOC_STATIC:
- SYMBOL_VALUE_ADDRESS(sym) += dreloc;
- break;
-
- case LOC_BLOCK:
- break;
-
- default:
- fatal("botched symbol class %x"
- , SYMBOL_CLASS(sym));
- break;
- }
- }
- }
-}
-
-/*
- * add_vmap - add a new vmap entry based on ldinfo() information
- */
-add_vmap(ldi)
-register struct ld_info *ldi; {
- bfd *bfd, *last;
- register char *mem, *objname;
-
- /* This ldi structure was allocated using alloca() in
- aixcoff_relocate_symtab(). Now we need to have persistent object
- and member names, so we should save them. */
-
- mem = ldi->ldinfo_filename + strlen(ldi->ldinfo_filename) + 1;
- mem = savestring (mem, strlen (mem));
- objname = savestring (ldi->ldinfo_filename, strlen (ldi->ldinfo_filename));
-
- bfd = bfd_fdopenr(objname, NULL, ldi->ldinfo_fd);
- if (!bfd)
- error("Could not open `%s' as an executable file: %s",
- objname, bfd_errmsg(bfd_error));
-
-
- /* make sure we have an object file */
-
- if (bfd_check_format(bfd, bfd_object))
- map_vmap (bfd, 0);
-
- else if (bfd_check_format(bfd, bfd_archive)) {
- last = 0;
- /*
- * FIXME??? am I tossing BFDs? bfd?
- */
- while (last = bfd_openr_next_archived_file(bfd, last))
- if (eq(mem, last->filename))
- break;
-
- if (!last) {
- bfd_close(bfd);
- /* FIXME -- should be error */
- warning("\"%s\": member \"%s\" missing.", bfd->filename, mem);
- return;
- }
-
- if (!bfd_check_format(last, bfd_object)) {
- bfd_close(last); /* XXX??? */
- goto obj_err;
- }
-
- map_vmap (last, bfd);
- }
- else {
- obj_err:
- bfd_close(bfd);
-/* FIXME -- should be error */
- warning("\"%s\": not in executable format: %s."
- , objname, bfd_errmsg(bfd_error));
- return;
- }
-}
-
-
-/* As well as symbol tables, exec_sections need relocation. After
- the inferior process' termination, there will be a relocated symbol
- table exist with no corresponding inferior process. At that time, we
- need to use `exec' bfd, rather than the inferior process's memory space
- to look up symbols.
-
- `exec_sections' need to be relocated only once, as long as the exec
- file remains unchanged.
-*/
-vmap_exec ()
-{
- static bfd *execbfd;
- if (execbfd == exec_bfd)
- return;
-
- execbfd = exec_bfd;
-
- /* First exec section is `.text', second is `.data'. If this is changed,
- then this routine will choke. */
-
- if (!vmap || !exec_ops.to_sections ||
- strcmp (exec_ops.to_sections[0].sec_ptr->name, ".text") ||
- strcmp (exec_ops.to_sections[1].sec_ptr->name, ".data"))
-
- fatal ("aix: Improper exec_ops sections.");
-
- exec_ops.to_sections [0].addr += vmap->tstart;
- exec_ops.to_sections [0].endaddr += vmap->tstart;
- exec_ops.to_sections [1].addr += vmap->dstart;
- exec_ops.to_sections [1].endaddr += vmap->dstart;
-}
-
-
-int
-text_adjustment (abfd)
-bfd *abfd;
-{
- static bfd *execbfd;
- static int adjustment;
- sec_ptr sect;
-
- if (exec_bfd == execbfd)
- return adjustment;
-
- sect = bfd_get_section_by_name (abfd, ".text");
- if (sect)
- adjustment = sect->filepos - sect->vma;
- else
- adjustment = 0x200; /* just a wild assumption */
-
- return adjustment;
-}
-
-
-/*
- * vmap_ldinfo - update VMAP info with ldinfo() information
- *
- * Input:
- * ldi - ^ to ldinfo() results.
- */
-vmap_ldinfo(ldi)
-register struct ld_info *ldi;
-{
- struct stat ii, vi;
- register struct vmap *vp;
- register got_one, retried;
- CORE_ADDR ostart;
-
- /*
- * for each *ldi, see if we have a corresponding *vp
- * if so, update the mapping, and symbol table.
- * if not, add an entry and symbol table.
- */
- do {
- char *name = ldi->ldinfo_filename;
- char *memb = name + strlen(name) + 1;
-
- retried = 0;
-
- if (fstat(ldi->ldinfo_fd, &ii) < 0)
- fatal("cannot fstat(%d) on %s"
- , ldi->ldinfo_fd
- , name);
-retry:
- for (got_one = 0, vp = vmap; vp; vp = vp->nxt) {
- FILE *io;
-
- /* The filenames are not always sufficient to match on. */
- if ((name[0] == "/"
- && !eq(name, vp->name))
- || (memb[0] && !eq(memb, vp->member)))
- continue;
-
- /* totally opaque! */
- io = bfd_cache_lookup(vp->bfd);
- if (!io)
- fatal("cannot find BFD's iostream for %s"
- , vp->name);
-
- /* see if we are referring to the same file */
- if (fstat(fileno(io), &vi) < 0)
- fatal("cannot fstat BFD for %s", vp->name);
-
- if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
- continue;
-
- if (!retried)
- close(ldi->ldinfo_fd);
-
- ++got_one;
-
- /* found a corresponding VMAP. remap! */
- ostart = vp->tstart;
-
- vp->tstart = ldi->ldinfo_textorg;
- vp->tend = vp->tstart + ldi->ldinfo_textsize;
- vp->dstart = ldi->ldinfo_dataorg;
- vp->dend = vp->dstart + ldi->ldinfo_datasize;
-
- if (vp->tadj) {
- vp->tstart += vp->tadj;
- vp->tend += vp->tadj;
- }
-
- /* relocate symbol table(s). */
- vmap_symtab(vp, ostart, &vi);
-
- /* there may be more, so we don't break out of the loop. */
- }
-
- /*
- * if there was no matching *vp, we must perforce create
- * the sucker(s)
- */
- if (!got_one && !retried) {
- add_vmap(ldi);
- ++retried;
- goto retry;
- }
- } while (ldi->ldinfo_next
- && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
-
-}
-
-/*
- * vmap_inferior - print VMAP info for inferior
- */
-vmap_inferior() {
-
- if (inferior_pid == 0)
- return 0; /* normal processing */
-
- exec_files_info();
- return 1;
-}
-
-/* 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)
- abort();
-
- 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->sec_ptr, myaddr, memaddr - p->addr, len);
- return (res != false)? 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->sec_ptr, myaddr, memaddr - p->addr, len);
- return (res != false)? 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;
-
- 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 (p->addr, "08"));
- printf_filtered (" - %s", local_hex_string_custom (p->endaddr, "08"));
- if (info_verbose)
- printf_filtered (" @ %s",
- local_hex_string_custom (p->sec_ptr->filepos, "08"));
- printf_filtered (" is %s", bfd_section_name (p->bfd, p->sec_ptr));
- 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("\n\tMapping info for file `%s'.\n", vp->name);
- printf("\t %8.8s %8.8s %8.8s %s\n",
- "start", "end", "section", "file(member)");
-
- for (; vp; vp = vp->nxt)
- printf("\t0x%8.8x 0x%8.8x %s%s%s%s\n",
- vp->tstart,
- vp->tend,
- 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->sec_ptr), seclen)
- && bfd_section_name (exec_bfd, p->sec_ptr)[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 */
- child_attach, 0, 0, 0, /* attach, detach, resume, wait, */
- 0, 0, /* fetch_registers, store_registers, */
- 0, 0, 0, /* prepare_to_store, conv_to, conv_from, */
- 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 */
- child_create_inferior,
- 0, /* mourn_inferior */
- 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 / binutils.git / blobdiff