976bb0be03
cleans up all kinds of hassles (which nm to use in munch, etc). The new formatting conventions (mostly already followed) are that the name of the _initialize_* routines must start in column zero, and must not be inside #if. * munch: Removed. * Makefile.in: Remove references to munch. * serial.c, remote.c, infptrace.c, maint.c, convex-tdep.c, alpha-tdep.c, hp300ux-nat.c, hppab-nat.c, osfsolib.c, remote-es.c, procfs.c, remote-udi.c, ser-go32.c, ultra3-xdep.c, sh-tdep.c, i960-tdep.c, hppa-tdep.c, h8500-tdep.c, dpx2-nat.c, delta68-nat.c, z8k-tdep.c: Make sure the above conventions are followed. Make sure they are all declared as returning void. Clean up miscellaneous comments and such.
789 lines
20 KiB
C
789 lines
20 KiB
C
/* Handle OSF/1 shared libraries for GDB, the GNU Debugger.
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Copyright 1993 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* FIXME: Most of this code could be merged with solib.c by using
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next_link_map_member and xfer_link_map_member in solib.c. */
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#include "defs.h"
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#include <sys/types.h>
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#include <signal.h>
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#include <string.h>
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#include <fcntl.h>
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#include "symtab.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "target.h"
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#include "frame.h"
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#include "regex.h"
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#include "inferior.h"
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#include "language.h"
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#define MAX_PATH_SIZE 256 /* FIXME: Should be dynamic */
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/* FIXME: This is a terrible hack for shared library support under OSF/1.
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The main problem is that the needed definitions are not contained in
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the system header files.
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The ldr_* routines described in loader(3) would be the way to go here.
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But they do not work for arbitrary target processes (as documented). */
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#ifndef USE_LDR_ROUTINES
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#define RLD_CONTEXT_ADDRESS 0x3ffc0000000
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typedef struct
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{
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CORE_ADDR next;
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CORE_ADDR previous;
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CORE_ADDR unknown;
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char *module_name;
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CORE_ADDR modinfo_addr;
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} ldr_module_info_t;
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typedef struct
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{
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CORE_ADDR unknown1;
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CORE_ADDR unknown2;
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CORE_ADDR head;
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CORE_ADDR tail;
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} ldr_context_t;
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static ldr_context_t ldr_context;
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#else
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#include <loader.h>
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#endif
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/* Define our own link_map structure.
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This will help to share code with solib.c. */
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struct link_map {
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CORE_ADDR l_addr; /* address at which object mapped */
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char *l_name; /* full name of loaded object */
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ldr_module_info_t module_info; /* corresponding module info */
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};
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#define LM_ADDR(so) ((so) -> lm.l_addr)
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#define LM_NAME(so) ((so) -> lm.l_name)
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struct so_list {
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struct so_list *next; /* next structure in linked list */
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struct link_map lm; /* copy of link map from inferior */
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struct link_map *lmaddr; /* addr in inferior lm was read from */
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CORE_ADDR lmend; /* upper addr bound of mapped object */
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char so_name[MAX_PATH_SIZE]; /* shared object lib name (FIXME) */
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char symbols_loaded; /* flag: symbols read in yet? */
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char from_tty; /* flag: print msgs? */
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struct objfile *objfile; /* objfile for loaded lib */
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struct section_table *sections;
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struct section_table *sections_end;
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struct section_table *textsection;
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bfd *abfd;
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};
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static struct so_list *so_list_head; /* List of known shared objects */
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extern int
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fdmatch PARAMS ((int, int)); /* In libiberty */
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/* Local function prototypes */
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static void
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sharedlibrary_command PARAMS ((char *, int));
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static void
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info_sharedlibrary_command PARAMS ((char *, int));
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static int
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symbol_add_stub PARAMS ((char *));
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static struct so_list *
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find_solib PARAMS ((struct so_list *));
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static struct link_map *
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first_link_map_member PARAMS ((void));
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static struct link_map *
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next_link_map_member PARAMS ((struct so_list *));
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static void
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xfer_link_map_member PARAMS ((struct so_list *, struct link_map *));
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static void
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solib_map_sections PARAMS ((struct so_list *));
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/*
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LOCAL FUNCTION
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solib_map_sections -- open bfd and build sections for shared lib
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SYNOPSIS
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static void solib_map_sections (struct so_list *so)
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DESCRIPTION
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Given a pointer to one of the shared objects in our list
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of mapped objects, use the recorded name to open a bfd
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descriptor for the object, build a section table, and then
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relocate all the section addresses by the base address at
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which the shared object was mapped.
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FIXMES
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In most (all?) cases the shared object file name recorded in the
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dynamic linkage tables will be a fully qualified pathname. For
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cases where it isn't, do we really mimic the systems search
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mechanism correctly in the below code (particularly the tilde
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expansion stuff?).
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*/
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static void
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solib_map_sections (so)
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struct so_list *so;
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{
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char *filename;
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char *scratch_pathname;
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int scratch_chan;
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struct section_table *p;
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struct cleanup *old_chain;
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bfd *abfd;
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filename = tilde_expand (so -> so_name);
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old_chain = make_cleanup (free, filename);
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scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
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&scratch_pathname);
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if (scratch_chan < 0)
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{
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scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename,
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O_RDONLY, 0, &scratch_pathname);
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}
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if (scratch_chan < 0)
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{
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perror_with_name (filename);
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}
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/* Leave scratch_pathname allocated. bfd->name will point to it. */
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abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
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if (!abfd)
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{
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close (scratch_chan);
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error ("Could not open `%s' as an executable file: %s",
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scratch_pathname, bfd_errmsg (bfd_error));
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}
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/* Leave bfd open, core_xfer_memory and "info files" need it. */
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so -> abfd = abfd;
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abfd -> cacheable = true;
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if (!bfd_check_format (abfd, bfd_object))
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{
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error ("\"%s\": not in executable format: %s.",
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scratch_pathname, bfd_errmsg (bfd_error));
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}
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if (build_section_table (abfd, &so -> sections, &so -> sections_end))
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{
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error ("Can't find the file sections in `%s': %s",
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bfd_get_filename (exec_bfd), bfd_errmsg (bfd_error));
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}
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for (p = so -> sections; p < so -> sections_end; p++)
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{
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/* Relocate the section binding addresses as recorded in the shared
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object's file by the base address to which the object was actually
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mapped. */
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p -> addr += (CORE_ADDR) LM_ADDR (so);
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p -> endaddr += (CORE_ADDR) LM_ADDR (so);
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so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend);
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if (STREQ (p -> sec_ptr -> name, ".text"))
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{
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so -> textsection = p;
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}
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}
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/* Free the file names, close the file now. */
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do_cleanups (old_chain);
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}
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/*
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LOCAL FUNCTION
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first_link_map_member -- locate first member in dynamic linker's map
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SYNOPSIS
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static struct link_map *first_link_map_member (void)
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DESCRIPTION
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Read in a copy of the first member in the inferior's dynamic
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link map from the inferior's dynamic linker structures, and return
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a pointer to the copy in our address space.
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*/
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static struct link_map *
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first_link_map_member ()
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{
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struct link_map *lm = NULL;
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static struct link_map first_lm;
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#ifdef USE_LDR_ROUTINES
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ldr_module_t mod_id = LDR_NULL_MODULE;
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size_t retsize;
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if (ldr_next_module(inferior_pid, &mod_id) != 0
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|| mod_id == LDR_NULL_MODULE
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|| ldr_inq_module(inferior_pid, mod_id,
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&first_lm.module_info, sizeof(ldr_module_info_t),
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&retsize) != 0)
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return lm;
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#else
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CORE_ADDR ldr_context_addr;
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if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS,
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(char *) &ldr_context_addr,
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sizeof (CORE_ADDR)) != 0
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|| target_read_memory (ldr_context_addr,
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(char *) &ldr_context,
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sizeof (ldr_context_t)) != 0
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|| target_read_memory ((CORE_ADDR) ldr_context.head,
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(char *) &first_lm.module_info,
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sizeof (ldr_module_info_t)) != 0)
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return lm;
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#endif
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lm = &first_lm;
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/* The first entry is for the main program and should be skipped. */
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lm->l_name = NULL;
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return lm;
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}
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static struct link_map *
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next_link_map_member (so_list_ptr)
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struct so_list *so_list_ptr;
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{
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struct link_map *lm = NULL;
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static struct link_map next_lm;
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#ifdef USE_LDR_ROUTINES
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ldr_module_t mod_id = lm->module_info.lmi_modid;
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size_t retsize;
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if (ldr_next_module(inferior_pid, &mod_id) != 0
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|| mod_id == LDR_NULL_MODULE
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|| ldr_inq_module(inferior_pid, mod_id,
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&next_lm.module_info, sizeof(ldr_module_info_t),
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&retsize) != 0)
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return lm;
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lm = &next_lm;
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lm->l_name = lm->module_info.lmi_name;
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#else
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CORE_ADDR ldr_context_addr;
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/* Reread context in case ldr_context.tail was updated. */
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if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS,
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(char *) &ldr_context_addr,
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sizeof (CORE_ADDR)) != 0
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|| target_read_memory (ldr_context_addr,
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(char *) &ldr_context,
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sizeof (ldr_context_t)) != 0
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|| so_list_ptr->lm.module_info.modinfo_addr == ldr_context.tail
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|| target_read_memory (so_list_ptr->lm.module_info.next,
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(char *) &next_lm.module_info,
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sizeof (ldr_module_info_t)) != 0)
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return lm;
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lm = &next_lm;
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lm->l_name = lm->module_info.module_name;
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#endif
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return lm;
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}
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static void
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xfer_link_map_member (so_list_ptr, lm)
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struct so_list *so_list_ptr;
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struct link_map *lm;
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{
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so_list_ptr->lm = *lm;
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/* OSF/1 has absolute addresses in shared libraries. */
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LM_ADDR (so_list_ptr) = 0;
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/* There is one entry that has no name (for the inferior executable)
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since it is not a shared object. */
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if (LM_NAME (so_list_ptr) != 0)
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{
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#ifdef USE_LDR_ROUTINES
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int len = strlen (LM_NAME (so_list_ptr) + 1);
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if (len > MAX_PATH_SIZE)
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len = MAX_PATH_SIZE;
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strncpy (so_list_ptr->so_name, LM_NAME (so_list_ptr), MAX_PATH_SIZE);
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#else
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if (!target_read_string((CORE_ADDR) LM_NAME (so_list_ptr),
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so_list_ptr->so_name, MAX_PATH_SIZE - 1))
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error ("xfer_link_map_member: Can't read pathname for load map\n");
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#endif
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so_list_ptr->so_name[MAX_PATH_SIZE - 1] = 0;
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solib_map_sections (so_list_ptr);
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}
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}
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/*
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LOCAL FUNCTION
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find_solib -- step through list of shared objects
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SYNOPSIS
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struct so_list *find_solib (struct so_list *so_list_ptr)
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DESCRIPTION
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This module contains the routine which finds the names of any
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loaded "images" in the current process. The argument in must be
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NULL on the first call, and then the returned value must be passed
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in on subsequent calls. This provides the capability to "step" down
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the list of loaded objects. On the last object, a NULL value is
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returned.
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The arg and return value are "struct link_map" pointers, as defined
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in <link.h>.
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*/
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static struct so_list *
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find_solib (so_list_ptr)
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struct so_list *so_list_ptr; /* Last lm or NULL for first one */
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{
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struct so_list *so_list_next = NULL;
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struct link_map *lm = NULL;
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struct so_list *new;
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if (so_list_ptr == NULL)
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{
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/* We are setting up for a new scan through the loaded images. */
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if ((so_list_next = so_list_head) == NULL)
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{
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/* Find the first link map list member. */
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lm = first_link_map_member ();
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}
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}
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else
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{
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/* We have been called before, and are in the process of walking
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the shared library list. Advance to the next shared object. */
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lm = next_link_map_member (so_list_ptr);
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so_list_next = so_list_ptr -> next;
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}
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if ((so_list_next == NULL) && (lm != NULL))
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{
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/* Get next link map structure from inferior image and build a local
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abbreviated load_map structure */
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new = (struct so_list *) xmalloc (sizeof (struct so_list));
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memset ((char *) new, 0, sizeof (struct so_list));
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new -> lmaddr = lm;
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/* Add the new node as the next node in the list, or as the root
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node if this is the first one. */
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if (so_list_ptr != NULL)
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{
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so_list_ptr -> next = new;
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}
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else
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{
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so_list_head = new;
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}
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so_list_next = new;
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xfer_link_map_member (new, lm);
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}
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return (so_list_next);
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}
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|
|
/* A small stub to get us past the arg-passing pinhole of catch_errors. */
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static int
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symbol_add_stub (arg)
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char *arg;
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|
{
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register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
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|
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|
so -> objfile = symbol_file_add (so -> so_name, so -> from_tty,
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so -> textsection -> addr,
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0, 0, 0);
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return (1);
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}
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|
|
/*
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|
GLOBAL FUNCTION
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|
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|
solib_add -- add a shared library file to the symtab and section list
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|
|
SYNOPSIS
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|
|
|
void solib_add (char *arg_string, int from_tty,
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struct target_ops *target)
|
|
|
|
DESCRIPTION
|
|
|
|
*/
|
|
|
|
void
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|
solib_add (arg_string, from_tty, target)
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|
char *arg_string;
|
|
int from_tty;
|
|
struct target_ops *target;
|
|
{
|
|
register struct so_list *so = NULL; /* link map state variable */
|
|
|
|
/* Last shared library that we read. */
|
|
struct so_list *so_last = NULL;
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|
|
|
char *re_err;
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|
int count;
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|
int old;
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|
|
|
if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
|
|
{
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|
error ("Invalid regexp: %s", re_err);
|
|
}
|
|
|
|
|
|
/* Add the shared library sections to the section table of the
|
|
specified target, if any. We have to do this before reading the
|
|
symbol files as symbol_file_add calls reinit_frame_cache and
|
|
creating a new frame might access memory in the shared library. */
|
|
if (target)
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|
{
|
|
/* Count how many new section_table entries there are. */
|
|
so = NULL;
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|
count = 0;
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0])
|
|
{
|
|
count += so -> sections_end - so -> sections;
|
|
}
|
|
}
|
|
|
|
if (count)
|
|
{
|
|
/* Reallocate the target's section table including the new size. */
|
|
if (target -> to_sections)
|
|
{
|
|
old = target -> to_sections_end - target -> to_sections;
|
|
target -> to_sections = (struct section_table *)
|
|
xrealloc ((char *)target -> to_sections,
|
|
(sizeof (struct section_table)) * (count + old));
|
|
}
|
|
else
|
|
{
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|
old = 0;
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|
target -> to_sections = (struct section_table *)
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|
xmalloc ((sizeof (struct section_table)) * count);
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|
}
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|
target -> to_sections_end = target -> to_sections + (count + old);
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|
|
|
/* Add these section table entries to the target's table. */
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0])
|
|
{
|
|
count = so -> sections_end - so -> sections;
|
|
memcpy ((char *) (target -> to_sections + old),
|
|
so -> sections,
|
|
(sizeof (struct section_table)) * count);
|
|
old += count;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now add the symbol files. */
|
|
so = NULL;
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0] && re_exec (so -> so_name))
|
|
{
|
|
so -> from_tty = from_tty;
|
|
if (so -> symbols_loaded)
|
|
{
|
|
if (from_tty)
|
|
{
|
|
printf ("Symbols already loaded for %s\n", so -> so_name);
|
|
}
|
|
}
|
|
else if (catch_errors
|
|
(symbol_add_stub, (char *) so,
|
|
"Error while reading shared library symbols:\n",
|
|
RETURN_MASK_ALL))
|
|
{
|
|
so_last = so;
|
|
so -> symbols_loaded = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
LOCAL FUNCTION
|
|
|
|
info_sharedlibrary_command -- code for "info sharedlibrary"
|
|
|
|
SYNOPSIS
|
|
|
|
static void info_sharedlibrary_command ()
|
|
|
|
DESCRIPTION
|
|
|
|
Walk through the shared library list and print information
|
|
about each attached library.
|
|
*/
|
|
|
|
static void
|
|
info_sharedlibrary_command (ignore, from_tty)
|
|
char *ignore;
|
|
int from_tty;
|
|
{
|
|
register struct so_list *so = NULL; /* link map state variable */
|
|
int header_done = 0;
|
|
|
|
if (exec_bfd == NULL)
|
|
{
|
|
printf ("No exec file.\n");
|
|
return;
|
|
}
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0])
|
|
{
|
|
unsigned long txt_start = 0;
|
|
unsigned long txt_end = 0;
|
|
|
|
if (!header_done)
|
|
{
|
|
printf("%-20s%-20s%-12s%s\n", "From", "To", "Syms Read",
|
|
"Shared Object Library");
|
|
header_done++;
|
|
}
|
|
if (so -> textsection)
|
|
{
|
|
txt_start = (unsigned long) so -> textsection -> addr;
|
|
txt_end = (unsigned long) so -> textsection -> endaddr;
|
|
}
|
|
printf ("%-20s", local_hex_string_custom (txt_start, "08l"));
|
|
printf ("%-20s", local_hex_string_custom (txt_end, "08l"));
|
|
printf ("%-12s", so -> symbols_loaded ? "Yes" : "No");
|
|
printf ("%s\n", so -> so_name);
|
|
}
|
|
}
|
|
if (so_list_head == NULL)
|
|
{
|
|
printf ("No shared libraries loaded at this time.\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
GLOBAL FUNCTION
|
|
|
|
solib_address -- check to see if an address is in a shared lib
|
|
|
|
SYNOPSIS
|
|
|
|
int solib_address (CORE_ADDR address)
|
|
|
|
DESCRIPTION
|
|
|
|
Provides a hook for other gdb routines to discover whether or
|
|
not a particular address is within the mapped address space of
|
|
a shared library. Any address between the base mapping address
|
|
and the first address beyond the end of the last mapping, is
|
|
considered to be within the shared library address space, for
|
|
our purposes.
|
|
|
|
For example, this routine is called at one point to disable
|
|
breakpoints which are in shared libraries that are not currently
|
|
mapped in.
|
|
*/
|
|
|
|
int
|
|
solib_address (address)
|
|
CORE_ADDR address;
|
|
{
|
|
register struct so_list *so = 0; /* link map state variable */
|
|
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0] && so -> textsection)
|
|
{
|
|
if ((address >= (CORE_ADDR) so -> textsection -> addr) &&
|
|
(address < (CORE_ADDR) so -> textsection -> endaddr))
|
|
{
|
|
return (1);
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/* Called by free_all_symtabs */
|
|
|
|
void
|
|
clear_solib()
|
|
{
|
|
struct so_list *next;
|
|
char *bfd_filename;
|
|
|
|
while (so_list_head)
|
|
{
|
|
if (so_list_head -> sections)
|
|
{
|
|
free ((PTR)so_list_head -> sections);
|
|
}
|
|
if (so_list_head -> abfd)
|
|
{
|
|
bfd_filename = bfd_get_filename (so_list_head -> abfd);
|
|
bfd_close (so_list_head -> abfd);
|
|
}
|
|
else
|
|
/* This happens for the executable on SVR4. */
|
|
bfd_filename = NULL;
|
|
|
|
next = so_list_head -> next;
|
|
if (bfd_filename)
|
|
free ((PTR)bfd_filename);
|
|
free ((PTR)so_list_head);
|
|
so_list_head = next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
GLOBAL FUNCTION
|
|
|
|
solib_create_inferior_hook -- shared library startup support
|
|
|
|
SYNOPSIS
|
|
|
|
void solib_create_inferior_hook()
|
|
|
|
DESCRIPTION
|
|
|
|
When gdb starts up the inferior, it nurses it along (through the
|
|
shell) until it is ready to execute it's first instruction. At this
|
|
point, this function gets called via expansion of the macro
|
|
SOLIB_CREATE_INFERIOR_HOOK.
|
|
For a statically bound executable, this first instruction is the
|
|
one at "_start", or a similar text label. No further processing is
|
|
needed in that case.
|
|
For a dynamically bound executable, this first instruction is somewhere
|
|
in the rld, and the actual user executable is not yet mapped in.
|
|
We continue the inferior again, rld then maps in the actual user
|
|
executable and any needed shared libraries and then sends
|
|
itself a SIGTRAP.
|
|
At that point we discover the names of all shared libraries and
|
|
read their symbols in.
|
|
|
|
FIXME
|
|
|
|
This code does not properly handle hitting breakpoints which the
|
|
user might have set in the rld itself. Proper handling would have
|
|
to check if the SIGTRAP happened due to a kill call.
|
|
|
|
Also, what if child has exit()ed? Must exit loop somehow.
|
|
*/
|
|
|
|
void
|
|
solib_create_inferior_hook()
|
|
{
|
|
|
|
/* Nothing to do for statically bound executables. */
|
|
|
|
if (symfile_objfile == 0 || symfile_objfile->ei.entry_file_lowpc == stop_pc)
|
|
return;
|
|
|
|
/* Now run the target. It will eventually get a SIGTRAP, at
|
|
which point all of the libraries will have been mapped in and we
|
|
can go groveling around in the rld structures to find
|
|
out what we need to know about them. */
|
|
|
|
clear_proceed_status ();
|
|
stop_soon_quietly = 1;
|
|
stop_signal = 0;
|
|
do
|
|
{
|
|
target_resume (-1, 0, stop_signal);
|
|
wait_for_inferior ();
|
|
}
|
|
while (stop_signal != SIGTRAP);
|
|
|
|
/* solib_add will call reinit_frame_cache via symbol_file_add.
|
|
But we are stopped in the runtime loader and we do not have symbols
|
|
for the runtime loader. So heuristic_proc_start will be called
|
|
and will put out an annoying warning.
|
|
Resetting stop_soon_quietly after symbol loading suppresses
|
|
the warning. */
|
|
solib_add ((char *) 0, 0, (struct target_ops *) 0);
|
|
stop_soon_quietly = 0;
|
|
}
|
|
|
|
|
|
/*
|
|
|
|
LOCAL FUNCTION
|
|
|
|
sharedlibrary_command -- handle command to explicitly add library
|
|
|
|
SYNOPSIS
|
|
|
|
static void sharedlibrary_command (char *args, int from_tty)
|
|
|
|
DESCRIPTION
|
|
|
|
*/
|
|
|
|
static void
|
|
sharedlibrary_command (args, from_tty)
|
|
char *args;
|
|
int from_tty;
|
|
{
|
|
dont_repeat ();
|
|
solib_add (args, from_tty, (struct target_ops *) 0);
|
|
}
|
|
|
|
void
|
|
_initialize_solib()
|
|
{
|
|
|
|
add_com ("sharedlibrary", class_files, sharedlibrary_command,
|
|
"Load shared object library symbols for files matching REGEXP.");
|
|
add_info ("sharedlibrary", info_sharedlibrary_command,
|
|
"Status of loaded shared object libraries.");
|
|
}
|