/* Handle SunOS and SVR4 shared libraries for GDB, the GNU Debugger.
Copyright 1990, 91, 92, 93, 94, 95, 96, 98, 1999
Free Software Foundation, Inc.
-
-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 file is part of GDB.
-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.
+ 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.
-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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
#ifndef SVR4_SHARED_LIBS
/* SunOS shared libs need the nlist structure. */
-#include <a.out.h>
+#include <a.out.h>
#else
#include "elf/external.h"
#endif
#include "language.h"
#include "gdbcmd.h"
-#define MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */
+#define MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */
/* On SVR4 systems, a list of symbols in the dynamic linker where
GDB can try to place a breakpoint to monitor shared library
mapping complete" breakpoint address. */
#ifdef SVR4_SHARED_LIBS
-static char *solib_break_names[] = {
+static char *solib_break_names[] =
+{
"r_debug_state",
"_r_debug_state",
"_dl_debug_state",
#define BKPT_AT_SYMBOL 1
#if defined (BKPT_AT_SYMBOL) && defined (SVR4_SHARED_LIBS)
-static char *bkpt_names[] = {
+static char *bkpt_names[] =
+{
#ifdef SOLIB_BKPT_NAME
SOLIB_BKPT_NAME, /* Prefer configured name if it exists. */
#endif
/* Symbols which are used to locate the base of the link map structures. */
#ifndef SVR4_SHARED_LIBS
-static char *debug_base_symbols[] = {
+static char *debug_base_symbols[] =
+{
"_DYNAMIC",
"_DYNAMIC__MGC",
NULL
};
#endif
-static char *main_name_list[] = {
+static char *main_name_list[] =
+{
"main_$main",
NULL
};
static CORE_ADDR debug_addr;
static CORE_ADDR flag_addr;
-#else /* SVR4_SHARED_LIBS */
+#else /* SVR4_SHARED_LIBS */
#define LM_ADDR(so) ((so) -> lm.l_addr)
#define LM_NEXT(so) ((so) -> lm.l_next)
static struct r_debug debug_copy;
char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
-#endif /* !SVR4_SHARED_LIBS */
-
-struct so_list {
- struct so_list *next; /* next structure in linked list */
- struct link_map lm; /* copy of link map from inferior */
- struct link_map *lmaddr; /* addr in inferior lm was read from */
- CORE_ADDR lmend; /* upper addr bound of mapped object */
- char so_name[MAX_PATH_SIZE]; /* shared object lib name (FIXME) */
- char symbols_loaded; /* flag: symbols read in yet? */
- char from_tty; /* flag: print msgs? */
- struct objfile *objfile; /* objfile for loaded lib */
- struct section_table *sections;
- struct section_table *sections_end;
- struct section_table *textsection;
- bfd *abfd;
-};
+#endif /* !SVR4_SHARED_LIBS */
+
+struct so_list
+ {
+ struct so_list *next; /* next structure in linked list */
+ struct link_map lm; /* copy of link map from inferior */
+ struct link_map *lmaddr; /* addr in inferior lm was read from */
+ CORE_ADDR lmend; /* upper addr bound of mapped object */
+ char so_name[MAX_PATH_SIZE]; /* shared object lib name (FIXME) */
+ char symbols_loaded; /* flag: symbols read in yet? */
+ char from_tty; /* flag: print msgs? */
+ struct objfile *objfile; /* objfile for loaded lib */
+ struct section_table *sections;
+ struct section_table *sections_end;
+ struct section_table *textsection;
+ bfd *abfd;
+ };
static struct so_list *so_list_head; /* List of known shared objects */
-static CORE_ADDR debug_base; /* Base of dynamic linker structures */
+static CORE_ADDR debug_base; /* Base of dynamic linker structures */
static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */
-static int solib_cleanup_queued = 0; /* make_run_cleanup called */
+static int solib_cleanup_queued = 0; /* make_run_cleanup called */
extern int
-fdmatch PARAMS ((int, int)); /* In libiberty */
+fdmatch PARAMS ((int, int)); /* In libiberty */
/* Local function prototypes */
static int symbol_add_stub PARAMS ((PTR));
static struct so_list *
-find_solib PARAMS ((struct so_list *));
+ find_solib PARAMS ((struct so_list *));
static struct link_map *
-first_link_map_member PARAMS ((void));
+ first_link_map_member PARAMS ((void));
static CORE_ADDR
-locate_base PARAMS ((void));
+ locate_base PARAMS ((void));
static int solib_map_sections PARAMS ((PTR));
#ifdef SVR4_SHARED_LIBS
static CORE_ADDR
-elf_locate_base PARAMS ((void));
+ elf_locate_base PARAMS ((void));
#else
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- solib_map_sections -- open bfd and build sections for shared lib
+ solib_map_sections -- open bfd and build sections for shared lib
-SYNOPSIS
+ SYNOPSIS
- static int solib_map_sections (struct so_list *so)
+ static int solib_map_sections (struct so_list *so)
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to one of the shared objects in our list
- of mapped objects, use the recorded name to open a bfd
- descriptor for the object, build a section table, and then
- relocate all the section addresses by the base address at
- which the shared object was mapped.
+ Given a pointer to one of the shared objects in our list
+ of mapped objects, use the recorded name to open a bfd
+ descriptor for the object, build a section table, and then
+ relocate all the section addresses by the base address at
+ which the shared object was mapped.
-FIXMES
+ FIXMES
- In most (all?) cases the shared object file name recorded in the
- dynamic linkage tables will be a fully qualified pathname. For
- cases where it isn't, do we really mimic the systems search
- mechanism correctly in the below code (particularly the tilde
- expansion stuff?).
+ In most (all?) cases the shared object file name recorded in the
+ dynamic linkage tables will be a fully qualified pathname. For
+ cases where it isn't, do we really mimic the systems search
+ mechanism correctly in the below code (particularly the tilde
+ expansion stuff?).
*/
static int
struct section_table *p;
struct cleanup *old_chain;
bfd *abfd;
-
- filename = tilde_expand (so -> so_name);
-
+
+ filename = tilde_expand (so->so_name);
+
if (solib_absolute_prefix && ROOTED_P (filename))
/* Prefix shared libraries with absolute filenames with
SOLIB_ABSOLUTE_PREFIX. */
scratch_chan = openp (solib_search_path,
1, filename, O_RDONLY, 0, &scratch_pathname);
if (scratch_chan < 0)
- scratch_chan = openp (get_in_environ (inferior_environ, "PATH"),
+ scratch_chan = openp (get_in_environ (inferior_environ, "PATH"),
1, filename, O_RDONLY, 0, &scratch_pathname);
if (scratch_chan < 0)
{
- scratch_chan = openp (get_in_environ
- (inferior_environ, "LD_LIBRARY_PATH"),
+ scratch_chan = openp (get_in_environ
+ (inferior_environ, "LD_LIBRARY_PATH"),
1, filename, O_RDONLY, 0, &scratch_pathname);
}
if (scratch_chan < 0)
scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
/* Leave bfd open, core_xfer_memory and "info files" need it. */
- so -> abfd = abfd;
- abfd -> cacheable = true;
+ so->abfd = abfd;
+ abfd->cacheable = true;
/* copy full path name into so_name, so that later symbol_file_add can find
it */
error ("\"%s\": not in executable format: %s.",
scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
- if (build_section_table (abfd, &so -> sections, &so -> sections_end))
+ if (build_section_table (abfd, &so->sections, &so->sections_end))
{
- error ("Can't find the file sections in `%s': %s",
+ error ("Can't find the file sections in `%s': %s",
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
}
- for (p = so -> sections; p < so -> sections_end; p++)
+ for (p = so->sections; p < so->sections_end; p++)
{
/* Relocate the section binding addresses as recorded in the shared
- object's file by the base address to which the object was actually
- mapped. */
- p -> addr += (CORE_ADDR) LM_ADDR (so);
- p -> endaddr += (CORE_ADDR) LM_ADDR (so);
- so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend);
- if (STREQ (p -> the_bfd_section -> name, ".text"))
+ object's file by the base address to which the object was actually
+ mapped. */
+ p->addr += (CORE_ADDR) LM_ADDR (so);
+ p->endaddr += (CORE_ADDR) LM_ADDR (so);
+ so->lmend = (CORE_ADDR) max (p->endaddr, so->lmend);
+ if (STREQ (p->the_bfd_section->name, ".text"))
{
- so -> textsection = p;
+ so->textsection = p;
}
}
objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
memset (objfile, 0, sizeof (struct objfile));
- objfile -> md = NULL;
- obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0,
+ objfile->md = NULL;
+ obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
xmalloc, free);
- obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, xmalloc,
+ obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc,
free);
- obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, xmalloc,
+ obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc,
free);
- obstack_specify_allocation (&objfile -> type_obstack, 0, 0, xmalloc,
+ obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc,
free);
- objfile -> name = mstrsave (objfile -> md, "rt_common");
+ objfile->name = mstrsave (objfile->md, "rt_common");
/* Add this file onto the tail of the linked list of other such files. */
- objfile -> next = NULL;
+ objfile->next = NULL;
if (object_files == NULL)
object_files = objfile;
else
{
for (last_one = object_files;
- last_one -> next;
- last_one = last_one -> next);
- last_one -> next = objfile;
+ last_one->next;
+ last_one = last_one->next);
+ last_one->next = objfile;
}
rt_common_objfile = objfile;
static void
solib_add_common_symbols (rtc_symp)
- struct rtc_symb *rtc_symp;
+ struct rtc_symb *rtc_symp;
{
struct rtc_symb inferior_rtc_symb;
struct nlist inferior_rtc_nlist;
/* Remove any runtime common symbols from previous runs. */
- if (rt_common_objfile != NULL && rt_common_objfile -> minimal_symbol_count)
+ if (rt_common_objfile != NULL && rt_common_objfile->minimal_symbol_count)
{
- obstack_free (&rt_common_objfile -> symbol_obstack, 0);
- obstack_specify_allocation (&rt_common_objfile -> symbol_obstack, 0, 0,
+ obstack_free (&rt_common_objfile->symbol_obstack, 0);
+ obstack_specify_allocation (&rt_common_objfile->symbol_obstack, 0, 0,
xmalloc, free);
- rt_common_objfile -> minimal_symbol_count = 0;
- rt_common_objfile -> msymbols = NULL;
+ rt_common_objfile->minimal_symbol_count = 0;
+ rt_common_objfile->msymbols = NULL;
}
init_minimal_symbol_collection ();
sizeof (inferior_rtc_symb));
read_memory ((CORE_ADDR) inferior_rtc_symb.rtc_sp,
(char *) &inferior_rtc_nlist,
- sizeof(inferior_rtc_nlist));
+ sizeof (inferior_rtc_nlist));
if (inferior_rtc_nlist.n_type == N_COMM)
{
/* FIXME: The length of the symbol name is not available, but in the
install_minimal_symbols (rt_common_objfile);
}
-#endif /* SVR4_SHARED_LIBS */
+#endif /* SVR4_SHARED_LIBS */
#ifdef SVR4_SHARED_LIBS
static CORE_ADDR
-bfd_lookup_symbol PARAMS ((bfd *, char *));
+ bfd_lookup_symbol PARAMS ((bfd *, char *));
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- bfd_lookup_symbol -- lookup the value for a specific symbol
+ bfd_lookup_symbol -- lookup the value for a specific symbol
-SYNOPSIS
+ SYNOPSIS
- CORE_ADDR bfd_lookup_symbol (bfd *abfd, char *symname)
+ CORE_ADDR bfd_lookup_symbol (bfd *abfd, char *symname)
-DESCRIPTION
+ DESCRIPTION
- An expensive way to lookup the value of a single symbol for
- bfd's that are only temporary anyway. This is used by the
- shared library support to find the address of the debugger
- interface structures in the shared library.
+ An expensive way to lookup the value of a single symbol for
+ bfd's that are only temporary anyway. This is used by the
+ shared library support to find the address of the debugger
+ interface structures in the shared library.
- Note that 0 is specifically allowed as an error return (no
- such symbol).
-*/
+ Note that 0 is specifically allowed as an error return (no
+ such symbol).
+ */
static CORE_ADDR
bfd_lookup_symbol (abfd, symname)
unsigned int i;
struct cleanup *back_to;
CORE_ADDR symaddr = 0;
-
+
storage_needed = bfd_get_symtab_upper_bound (abfd);
if (storage_needed > 0)
{
symbol_table = (asymbol **) xmalloc (storage_needed);
- back_to = make_cleanup (free, (PTR)symbol_table);
- number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
-
+ back_to = make_cleanup (free, (PTR) symbol_table);
+ number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
+
for (i = 0; i < number_of_symbols; i++)
{
sym = *symbol_table++;
- if (STREQ (sym -> name, symname))
+ if (STREQ (sym->name, symname))
{
/* Bfd symbols are section relative. */
- symaddr = sym -> value + sym -> section -> vma;
+ symaddr = sym->value + sym->section->vma;
break;
}
}
#ifdef HANDLE_SVR4_EXEC_EMULATORS
/*
- Solaris BCP (the part of Solaris which allows it to run SunOS4
- a.out files) throws in another wrinkle. Solaris does not fill
- in the usual a.out link map structures when running BCP programs,
- the only way to get at them is via groping around in the dynamic
- linker.
- The dynamic linker and it's structures are located in the shared
- C library, which gets run as the executable's "interpreter" by
- the kernel.
-
- Note that we can assume nothing about the process state at the time
- we need to find these structures. We may be stopped on the first
- instruction of the interpreter (C shared library), the first
- instruction of the executable itself, or somewhere else entirely
- (if we attached to the process for example).
-*/
-
-static char *debug_base_symbols[] = {
- "r_debug", /* Solaris 2.3 */
- "_r_debug", /* Solaris 2.1, 2.2 */
+ Solaris BCP (the part of Solaris which allows it to run SunOS4
+ a.out files) throws in another wrinkle. Solaris does not fill
+ in the usual a.out link map structures when running BCP programs,
+ the only way to get at them is via groping around in the dynamic
+ linker.
+ The dynamic linker and it's structures are located in the shared
+ C library, which gets run as the executable's "interpreter" by
+ the kernel.
+
+ Note that we can assume nothing about the process state at the time
+ we need to find these structures. We may be stopped on the first
+ instruction of the interpreter (C shared library), the first
+ instruction of the executable itself, or somewhere else entirely
+ (if we attached to the process for example).
+ */
+
+static char *debug_base_symbols[] =
+{
+ "r_debug", /* Solaris 2.3 */
+ "_r_debug", /* Solaris 2.1, 2.2 */
NULL
};
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- look_for_base -- examine file for each mapped address segment
+ look_for_base -- examine file for each mapped address segment
-SYNOPSYS
+ SYNOPSYS
- static int look_for_base (int fd, CORE_ADDR baseaddr)
+ static int look_for_base (int fd, CORE_ADDR baseaddr)
-DESCRIPTION
+ DESCRIPTION
- This function is passed to proc_iterate_over_mappings, which
- causes it to get called once for each mapped address space, with
- an open file descriptor for the file mapped to that space, and the
- base address of that mapped space.
+ This function is passed to proc_iterate_over_mappings, which
+ causes it to get called once for each mapped address space, with
+ an open file descriptor for the file mapped to that space, and the
+ base address of that mapped space.
- Our job is to find the debug base symbol in the file that this
- fd is open on, if it exists, and if so, initialize the dynamic
- linker structure base address debug_base.
+ Our job is to find the debug base symbol in the file that this
+ fd is open on, if it exists, and if so, initialize the dynamic
+ linker structure base address debug_base.
- Note that this is a computationally expensive proposition, since
- we basically have to open a bfd on every call, so we specifically
- avoid opening the exec file.
+ Note that this is a computationally expensive proposition, since
+ we basically have to open a bfd on every call, so we specifically
+ avoid opening the exec file.
*/
static int
if (fd == -1
|| (exec_bfd != NULL
- && fdmatch (fileno ((FILE *)(exec_bfd -> iostream)), fd)))
+ && fdmatch (fileno ((FILE *) (exec_bfd->iostream)), fd)))
{
return (0);
}
if (!bfd_check_format (interp_bfd, bfd_object))
{
/* FIXME-leak: on failure, might not free all memory associated with
- interp_bfd. */
+ interp_bfd. */
bfd_close (interp_bfd);
return (0);
}
if (address == 0)
{
/* FIXME-leak: on failure, might not free all memory associated with
- interp_bfd. */
+ interp_bfd. */
bfd_close (interp_bfd);
return (0);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- elf_locate_base -- locate the base address of dynamic linker structs
- for SVR4 elf targets.
+ elf_locate_base -- locate the base address of dynamic linker structs
+ for SVR4 elf targets.
-SYNOPSIS
+ SYNOPSIS
- CORE_ADDR elf_locate_base (void)
+ CORE_ADDR elf_locate_base (void)
-DESCRIPTION
+ DESCRIPTION
- For SVR4 elf targets the address of the dynamic linker's runtime
- structure is contained within the dynamic info section in the
- executable file. The dynamic section is also mapped into the
- inferior address space. Because the runtime loader fills in the
- real address before starting the inferior, we have to read in the
- dynamic info section from the inferior address space.
- If there are any errors while trying to find the address, we
- silently return 0, otherwise the found address is returned.
+ For SVR4 elf targets the address of the dynamic linker's runtime
+ structure is contained within the dynamic info section in the
+ executable file. The dynamic section is also mapped into the
+ inferior address space. Because the runtime loader fills in the
+ real address before starting the inferior, we have to read in the
+ dynamic info section from the inferior address space.
+ If there are any errors while trying to find the address, we
+ silently return 0, otherwise the found address is returned.
*/
buf < bufend;
buf += sizeof (Elf32_External_Dyn))
{
- Elf32_External_Dyn *x_dynp = (Elf32_External_Dyn *)buf;
+ Elf32_External_Dyn *x_dynp = (Elf32_External_Dyn *) buf;
long dyn_tag;
CORE_ADDR dyn_ptr;
buf < bufend;
buf += sizeof (Elf64_External_Dyn))
{
- Elf64_External_Dyn *x_dynp = (Elf64_External_Dyn *)buf;
+ Elf64_External_Dyn *x_dynp = (Elf64_External_Dyn *) buf;
long dyn_tag;
CORE_ADDR dyn_ptr;
return 0;
}
-#endif /* SVR4_SHARED_LIBS */
+#endif /* SVR4_SHARED_LIBS */
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- locate_base -- locate the base address of dynamic linker structs
+ locate_base -- locate the base address of dynamic linker structs
-SYNOPSIS
+ SYNOPSIS
- CORE_ADDR locate_base (void)
+ CORE_ADDR locate_base (void)
-DESCRIPTION
+ DESCRIPTION
- For both the SunOS and SVR4 shared library implementations, if the
- inferior executable has been linked dynamically, there is a single
- address somewhere in the inferior's data space which is the key to
- locating all of the dynamic linker's runtime structures. This
- address is the value of the debug base symbol. The job of this
- function is to find and return that address, or to return 0 if there
- is no such address (the executable is statically linked for example).
+ For both the SunOS and SVR4 shared library implementations, if the
+ inferior executable has been linked dynamically, there is a single
+ address somewhere in the inferior's data space which is the key to
+ locating all of the dynamic linker's runtime structures. This
+ address is the value of the debug base symbol. The job of this
+ function is to find and return that address, or to return 0 if there
+ is no such address (the executable is statically linked for example).
- For SunOS, the job is almost trivial, since the dynamic linker and
- all of it's structures are statically linked to the executable at
- link time. Thus the symbol for the address we are looking for has
- already been added to the minimal symbol table for the executable's
- objfile at the time the symbol file's symbols were read, and all we
- have to do is look it up there. Note that we explicitly do NOT want
- to find the copies in the shared library.
+ For SunOS, the job is almost trivial, since the dynamic linker and
+ all of it's structures are statically linked to the executable at
+ link time. Thus the symbol for the address we are looking for has
+ already been added to the minimal symbol table for the executable's
+ objfile at the time the symbol file's symbols were read, and all we
+ have to do is look it up there. Note that we explicitly do NOT want
+ to find the copies in the shared library.
- The SVR4 version is a bit more complicated because the address
- is contained somewhere in the dynamic info section. We have to go
- to a lot more work to discover the address of the debug base symbol.
- Because of this complexity, we cache the value we find and return that
- value on subsequent invocations. Note there is no copy in the
- executable symbol tables.
+ The SVR4 version is a bit more complicated because the address
+ is contained somewhere in the dynamic info section. We have to go
+ to a lot more work to discover the address of the debug base symbol.
+ Because of this complexity, we cache the value we find and return that
+ value on subsequent invocations. Note there is no copy in the
+ executable symbol tables.
*/
}
return (0);
-#else /* SVR4_SHARED_LIBS */
+#else /* SVR4_SHARED_LIBS */
/* Check to see if we have a currently valid address, and if so, avoid
doing all this work again and just return the cached address. If
}
return (debug_base);
-#endif /* !SVR4_SHARED_LIBS */
+#endif /* !SVR4_SHARED_LIBS */
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- first_link_map_member -- locate first member in dynamic linker's map
+ first_link_map_member -- locate first member in dynamic linker's map
-SYNOPSIS
+ SYNOPSIS
- static struct link_map *first_link_map_member (void)
+ static struct link_map *first_link_map_member (void)
-DESCRIPTION
+ DESCRIPTION
- Read in a copy of the first member in the inferior's dynamic
- link map from the inferior's dynamic linker structures, and return
- a pointer to the copy in our address space.
-*/
+ Read in a copy of the first member in the inferior's dynamic
+ link map from the inferior's dynamic linker structures, and return
+ a pointer to the copy in our address space.
+ */
static struct link_map *
first_link_map_member ()
if (dynamic_copy.ld_version >= 2)
{
/* It is a version that we can deal with, so read in the secondary
- structure and find the address of the link map list from it. */
+ structure and find the address of the link map list from it. */
read_memory ((CORE_ADDR) dynamic_copy.ld_un.ld_2, (char *) &ld_2_copy,
sizeof (struct link_dynamic_2));
lm = ld_2_copy.ld_loaded;
}
-#else /* SVR4_SHARED_LIBS */
+#else /* SVR4_SHARED_LIBS */
read_memory (debug_base, (char *) &debug_copy, sizeof (struct r_debug));
/* FIXME: Perhaps we should validate the info somehow, perhaps by
RT_CONSISTENT. */
lm = debug_copy.r_map;
-#endif /* !SVR4_SHARED_LIBS */
+#endif /* !SVR4_SHARED_LIBS */
return (lm);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- find_solib -- step through list of shared objects
+ find_solib -- step through list of shared objects
-SYNOPSIS
+ SYNOPSIS
- struct so_list *find_solib (struct so_list *so_list_ptr)
+ struct so_list *find_solib (struct so_list *so_list_ptr)
-DESCRIPTION
+ DESCRIPTION
- This module contains the routine which finds the names of any
- loaded "images" in the current process. The argument in must be
- NULL on the first call, and then the returned value must be passed
- in on subsequent calls. This provides the capability to "step" down
- the list of loaded objects. On the last object, a NULL value is
- returned.
+ This module contains the routine which finds the names of any
+ loaded "images" in the current process. The argument in must be
+ NULL on the first call, and then the returned value must be passed
+ in on subsequent calls. This provides the capability to "step" down
+ the list of loaded objects. On the last object, a NULL value is
+ returned.
- The arg and return value are "struct link_map" pointers, as defined
- in <link.h>.
+ The arg and return value are "struct link_map" pointers, as defined
+ in <link.h>.
*/
static struct so_list *
struct so_list *so_list_next = NULL;
struct link_map *lm = NULL;
struct so_list *new;
-
+
if (so_list_ptr == NULL)
{
/* We are setting up for a new scan through the loaded images. */
if (debug_base != 0)
{
/* Read the base structure in and find the address of the first
- link map list member. */
+ link map list member. */
lm = first_link_map_member ();
}
}
else
{
/* We have been called before, and are in the process of walking
- the shared library list. Advance to the next shared object. */
+ the shared library list. Advance to the next shared object. */
if ((lm = LM_NEXT (so_list_ptr)) == NULL)
{
/* We have hit the end of the list, so check to see if any were
added, but be quiet if we can't read from the target any more. */
- int status = target_read_memory ((CORE_ADDR) so_list_ptr -> lmaddr,
- (char *) &(so_list_ptr -> lm),
+ int status = target_read_memory ((CORE_ADDR) so_list_ptr->lmaddr,
+ (char *) &(so_list_ptr->lm),
sizeof (struct link_map));
if (status == 0)
{
lm = NULL;
}
}
- so_list_next = so_list_ptr -> next;
+ so_list_next = so_list_ptr->next;
}
if ((so_list_next == NULL) && (lm != NULL))
{
/* Get next link map structure from inferior image and build a local
- abbreviated load_map structure */
+ abbreviated load_map structure */
new = (struct so_list *) xmalloc (sizeof (struct so_list));
memset ((char *) new, 0, sizeof (struct so_list));
- new -> lmaddr = lm;
+ new->lmaddr = lm;
/* Add the new node as the next node in the list, or as the root
- node if this is the first one. */
+ node if this is the first one. */
if (so_list_ptr != NULL)
{
- so_list_ptr -> next = new;
+ so_list_ptr->next = new;
}
else
{
so_list_head = new;
- if (! solib_cleanup_queued)
+ if (!solib_cleanup_queued)
{
make_run_cleanup (do_clear_solib, NULL);
solib_cleanup_queued = 1;
}
-
- }
+
+ }
so_list_next = new;
- read_memory ((CORE_ADDR) lm, (char *) &(new -> lm),
+ read_memory ((CORE_ADDR) lm, (char *) &(new->lm),
sizeof (struct link_map));
/* For SVR4 versions, the first entry in the link map is for the
- inferior executable, so we must ignore it. For some versions of
- SVR4, it has no name. For others (Solaris 2.3 for example), it
- does have a name, so we can no longer use a missing name to
- decide when to ignore it. */
- if (!IGNORE_FIRST_LINK_MAP_ENTRY (new -> lm))
+ inferior executable, so we must ignore it. For some versions of
+ SVR4, it has no name. For others (Solaris 2.3 for example), it
+ does have a name, so we can no longer use a missing name to
+ decide when to ignore it. */
+ if (!IGNORE_FIRST_LINK_MAP_ENTRY (new->lm))
{
int errcode;
char *buffer;
safe_strerror (errcode));
return (so_list_next);
}
- strncpy (new -> so_name, buffer, MAX_PATH_SIZE - 1);
- new -> so_name[MAX_PATH_SIZE - 1] = '\0';
+ strncpy (new->so_name, buffer, MAX_PATH_SIZE - 1);
+ new->so_name[MAX_PATH_SIZE - 1] = '\0';
free (buffer);
catch_errors (solib_map_sections, new,
"Error while mapping shared library sections:\n",
RETURN_MASK_ALL);
- }
+ }
}
return (so_list_next);
}
symbol_add_stub (arg)
PTR arg;
{
- register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
+ register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
CORE_ADDR text_addr = 0;
- if (so -> textsection)
- text_addr = so -> textsection -> addr;
- else if (so -> abfd != NULL)
+ if (so->textsection)
+ text_addr = so->textsection->addr;
+ else if (so->abfd != NULL)
{
asection *lowest_sect;
/* If we didn't find a mapped non zero sized .text section, set up
- text_addr so that the relocation in symbol_file_add does no harm. */
+ text_addr so that the relocation in symbol_file_add does no harm. */
- lowest_sect = bfd_get_section_by_name (so -> abfd, ".text");
+ lowest_sect = bfd_get_section_by_name (so->abfd, ".text");
if (lowest_sect == NULL)
- bfd_map_over_sections (so -> abfd, find_lowest_section,
- (PTR) &lowest_sect);
+ bfd_map_over_sections (so->abfd, find_lowest_section,
+ (PTR) & lowest_sect);
if (lowest_sect)
- text_addr = bfd_section_vma (so -> abfd, lowest_sect)
- + (CORE_ADDR) LM_ADDR (so);
- }
-
- ALL_OBJFILES (so -> objfile)
- {
- if (strcmp (so -> objfile -> name, so -> so_name) == 0)
- return 1;
+ text_addr = bfd_section_vma (so->abfd, lowest_sect)
+ + (CORE_ADDR) LM_ADDR (so);
}
- so -> objfile =
- symbol_file_add (so -> so_name, so -> from_tty,
+
+ ALL_OBJFILES (so->objfile)
+ {
+ if (strcmp (so->objfile->name, so->so_name) == 0)
+ return 1;
+ }
+ so->objfile =
+ symbol_file_add (so->so_name, so->from_tty,
text_addr,
0, 0, 0, 0, 1);
return (1);
/* This function will check the so name to see if matches the main list.
In some system the main object is in the list, which we want to exclude */
-static int match_main (soname)
- char *soname;
+static int
+match_main (soname)
+ char *soname;
{
char **mainp;
/*
-GLOBAL FUNCTION
+ GLOBAL FUNCTION
- solib_add -- add a shared library file to the symtab and section list
+ solib_add -- add a shared library file to the symtab and section list
-SYNOPSIS
+ SYNOPSIS
- void solib_add (char *arg_string, int from_tty,
- struct target_ops *target)
+ void solib_add (char *arg_string, int from_tty,
+ struct target_ops *target)
-DESCRIPTION
+ DESCRIPTION
-*/
+ */
void
solib_add (arg_string, from_tty, target)
char *arg_string;
int from_tty;
struct target_ops *target;
-{
- register struct so_list *so = NULL; /* link map state variable */
+{
+ register struct so_list *so = NULL; /* link map state variable */
/* Last shared library that we read. */
struct so_list *so_last = NULL;
char *re_err;
int count;
int old;
-
+
if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
{
error ("Invalid regexp: %s", re_err);
}
-
+
/* Add the shared library sections to the section table of the
specified target, if any. */
if (target)
count = 0;
while ((so = find_solib (so)) != NULL)
{
- if (so -> so_name[0] && !match_main (so -> so_name))
+ if (so->so_name[0] && !match_main (so->so_name))
{
- count += so -> sections_end - so -> sections;
+ count += so->sections_end - so->sections;
}
}
-
+
if (count)
{
int update_coreops;
here, otherwise we dereference a potential dangling pointer
for each call to target_read/write_memory within this routine. */
update_coreops = core_ops.to_sections == target->to_sections;
-
+
/* Reallocate the target's section table including the new size. */
- if (target -> to_sections)
+ 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));
+ 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
{
old = 0;
- target -> to_sections = (struct section_table *)
+ target->to_sections = (struct section_table *)
xmalloc ((sizeof (struct section_table)) * count);
}
- target -> to_sections_end = target -> to_sections + (count + old);
-
+ target->to_sections_end = target->to_sections + (count + old);
+
/* Update the to_sections field in the core_ops structure
if needed. */
if (update_coreops)
/* Add these section table entries to the target's table. */
while ((so = find_solib (so)) != NULL)
{
- if (so -> so_name[0])
+ if (so->so_name[0])
{
- count = so -> sections_end - so -> sections;
- memcpy ((char *) (target -> to_sections + old),
- so -> sections,
+ 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. */
while ((so = find_solib (so)) != NULL)
{
- if (so -> so_name[0] && re_exec (so -> so_name) &&
- !match_main (so -> so_name))
+ if (so->so_name[0] && re_exec (so->so_name) &&
+ !match_main (so->so_name))
{
- so -> from_tty = from_tty;
- if (so -> symbols_loaded)
+ so->from_tty = from_tty;
+ if (so->symbols_loaded)
{
if (from_tty)
{
- printf_unfiltered ("Symbols already loaded for %s\n", so -> so_name);
+ printf_unfiltered ("Symbols already loaded for %s\n", so->so_name);
}
}
else if (catch_errors
RETURN_MASK_ALL))
{
so_last = so;
- so -> symbols_loaded = 1;
+ so->symbols_loaded = 1;
}
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- info_sharedlibrary_command -- code for "info sharedlibrary"
+ info_sharedlibrary_command -- code for "info sharedlibrary"
-SYNOPSIS
+ SYNOPSIS
- static void info_sharedlibrary_command ()
+ static void info_sharedlibrary_command ()
-DESCRIPTION
+ DESCRIPTION
- Walk through the shared library list and print information
- about each attached library.
-*/
+ 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 */
+ register struct so_list *so = NULL; /* link map state variable */
int header_done = 0;
int addr_width;
char *addr_fmt;
}
#ifndef TARGET_ELF64
- addr_width = 8+4;
+ addr_width = 8 + 4;
addr_fmt = "08l";
#else
- addr_width = 16+4;
+ addr_width = 16 + 4;
addr_fmt = "016l";
#endif
while ((so = find_solib (so)) != NULL)
{
- if (so -> so_name[0])
+ if (so->so_name[0])
{
if (!header_done)
{
- printf_unfiltered("%-*s%-*s%-12s%s\n", addr_width, "From",
- addr_width, "To", "Syms Read",
- "Shared Object Library");
+ printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From",
+ addr_width, "To", "Syms Read",
+ "Shared Object Library");
header_done++;
}
printf_unfiltered ("%-*s", addr_width,
- local_hex_string_custom ((unsigned long) LM_ADDR (so),
- addr_fmt));
+ local_hex_string_custom ((unsigned long) LM_ADDR (so),
+ addr_fmt));
printf_unfiltered ("%-*s", addr_width,
- local_hex_string_custom ((unsigned long) so -> lmend,
- addr_fmt));
- printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No");
- printf_unfiltered ("%s\n", so -> so_name);
+ local_hex_string_custom ((unsigned long) so->lmend,
+ addr_fmt));
+ printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No");
+ printf_unfiltered ("%s\n", so->so_name);
}
}
if (so_list_head == NULL)
{
- printf_unfiltered ("No shared libraries loaded at this time.\n");
+ printf_unfiltered ("No shared libraries loaded at this time.\n");
}
}
/*
-GLOBAL FUNCTION
+ GLOBAL FUNCTION
- solib_address -- check to see if an address is in a shared lib
+ solib_address -- check to see if an address is in a shared lib
-SYNOPSIS
+ SYNOPSIS
- char * solib_address (CORE_ADDR address)
+ char * solib_address (CORE_ADDR address)
-DESCRIPTION
+ 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.
+ 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.
+ For example, this routine is called at one point to disable
+ breakpoints which are in shared libraries that are not currently
+ mapped in.
*/
char *
solib_address (address)
CORE_ADDR address;
{
- register struct so_list *so = 0; /* link map state variable */
-
+ register struct so_list *so = 0; /* link map state variable */
+
while ((so = find_solib (so)) != NULL)
{
- if (so -> so_name[0])
+ if (so->so_name[0])
{
if ((address >= (CORE_ADDR) LM_ADDR (so)) &&
- (address < (CORE_ADDR) so -> lmend))
+ (address < (CORE_ADDR) so->lmend))
return (so->so_name);
}
}
/* Called by free_all_symtabs */
-void
+void
clear_solib ()
{
struct so_list *next;
while (so_list_head)
{
- if (so_list_head -> sections)
+ if (so_list_head->sections)
{
- free ((PTR)so_list_head -> sections);
+ free ((PTR) so_list_head->sections);
}
- if (so_list_head -> abfd)
+ if (so_list_head->abfd)
{
- bfd_filename = bfd_get_filename (so_list_head -> abfd);
- if (!bfd_close (so_list_head -> abfd))
+ bfd_filename = bfd_get_filename (so_list_head->abfd);
+ if (!bfd_close (so_list_head->abfd))
warning ("cannot close \"%s\": %s",
bfd_filename, bfd_errmsg (bfd_get_error ()));
}
/* This happens for the executable on SVR4. */
bfd_filename = NULL;
- next = so_list_head -> next;
+ next = so_list_head->next;
if (bfd_filename)
- free ((PTR)bfd_filename);
- free ((PTR)so_list_head);
+ free ((PTR) bfd_filename);
+ free ((PTR) so_list_head);
so_list_head = next;
}
debug_base = 0;
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- disable_break -- remove the "mapping changed" breakpoint
+ disable_break -- remove the "mapping changed" breakpoint
-SYNOPSIS
+ SYNOPSIS
- static int disable_break ()
+ static int disable_break ()
-DESCRIPTION
+ DESCRIPTION
- Removes the breakpoint that gets hit when the dynamic linker
- completes a mapping change.
+ Removes the breakpoint that gets hit when the dynamic linker
+ completes a mapping change.
-*/
+ */
#ifndef SVR4_SHARED_LIBS
#ifndef SVR4_SHARED_LIBS
int in_debugger = 0;
-
+
/* Read the debugger structure from the inferior to retrieve the
address of the breakpoint and the original contents of the
breakpoint address. Remove the breakpoint by writing the original
write_memory (breakpoint_addr, (char *) &debug_copy.ldd_bp_inst,
sizeof (debug_copy.ldd_bp_inst));
-#else /* SVR4_SHARED_LIBS */
+#else /* SVR4_SHARED_LIBS */
/* Note that breakpoint address and original contents are in our address
space, so we just need to write the original contents back. */
status = 0;
}
-#endif /* !SVR4_SHARED_LIBS */
+#endif /* !SVR4_SHARED_LIBS */
/* For the SVR4 version, we always know the breakpoint address. For the
SunOS version we don't know it until the above code is executed.
return (status);
}
-#endif /* #ifdef SVR4_SHARED_LIBS */
+#endif /* #ifdef SVR4_SHARED_LIBS */
/*
-LOCAL FUNCTION
-
- enable_break -- arrange for dynamic linker to hit breakpoint
-
-SYNOPSIS
-
- int enable_break (void)
-
-DESCRIPTION
-
- Both the SunOS and the SVR4 dynamic linkers have, as part of their
- debugger interface, support for arranging for the inferior to hit
- a breakpoint after mapping in the shared libraries. This function
- enables that breakpoint.
-
- For SunOS, there is a special flag location (in_debugger) which we
- set to 1. When the dynamic linker sees this flag set, it will set
- a breakpoint at a location known only to itself, after saving the
- original contents of that place and the breakpoint address itself,
- in it's own internal structures. When we resume the inferior, it
- will eventually take a SIGTRAP when it runs into the breakpoint.
- We handle this (in a different place) by restoring the contents of
- the breakpointed location (which is only known after it stops),
- chasing around to locate the shared libraries that have been
- loaded, then resuming.
-
- For SVR4, the debugger interface structure contains a member (r_brk)
- which is statically initialized at the time the shared library is
- built, to the offset of a function (_r_debug_state) which is guaran-
- teed to be called once before mapping in a library, and again when
- the mapping is complete. At the time we are examining this member,
- it contains only the unrelocated offset of the function, so we have
- to do our own relocation. Later, when the dynamic linker actually
- runs, it relocates r_brk to be the actual address of _r_debug_state().
-
- The debugger interface structure also contains an enumeration which
- is set to either RT_ADD or RT_DELETE prior to changing the mapping,
- depending upon whether or not the library is being mapped or unmapped,
- and then set to RT_CONSISTENT after the library is mapped/unmapped.
-*/
+ LOCAL FUNCTION
+
+ enable_break -- arrange for dynamic linker to hit breakpoint
+
+ SYNOPSIS
+
+ int enable_break (void)
+
+ DESCRIPTION
+
+ Both the SunOS and the SVR4 dynamic linkers have, as part of their
+ debugger interface, support for arranging for the inferior to hit
+ a breakpoint after mapping in the shared libraries. This function
+ enables that breakpoint.
+
+ For SunOS, there is a special flag location (in_debugger) which we
+ set to 1. When the dynamic linker sees this flag set, it will set
+ a breakpoint at a location known only to itself, after saving the
+ original contents of that place and the breakpoint address itself,
+ in it's own internal structures. When we resume the inferior, it
+ will eventually take a SIGTRAP when it runs into the breakpoint.
+ We handle this (in a different place) by restoring the contents of
+ the breakpointed location (which is only known after it stops),
+ chasing around to locate the shared libraries that have been
+ loaded, then resuming.
+
+ For SVR4, the debugger interface structure contains a member (r_brk)
+ which is statically initialized at the time the shared library is
+ built, to the offset of a function (_r_debug_state) which is guaran-
+ teed to be called once before mapping in a library, and again when
+ the mapping is complete. At the time we are examining this member,
+ it contains only the unrelocated offset of the function, so we have
+ to do our own relocation. Later, when the dynamic linker actually
+ runs, it relocates r_brk to be the actual address of _r_debug_state().
+
+ The debugger interface structure also contains an enumeration which
+ is set to either RT_ADD or RT_DELETE prior to changing the mapping,
+ depending upon whether or not the library is being mapped or unmapped,
+ and then set to RT_CONSISTENT after the library is mapped/unmapped.
+ */
static int
enable_break ()
write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger));
success = 1;
-#else /* SVR4_SHARED_LIBS */
+#else /* SVR4_SHARED_LIBS */
#ifdef BKPT_AT_SYMBOL
CORE_ADDR sym_addr = 0;
/* Read the contents of the .interp section into a local buffer;
- the contents specify the dynamic linker this program uses. */
+ the contents specify the dynamic linker this program uses. */
interp_sect_size = bfd_section_size (exec_bfd, interp_sect);
buf = alloca (interp_sect_size);
bfd_get_section_contents (exec_bfd, interp_sect,
buf, 0, interp_sect_size);
/* Now we need to figure out where the dynamic linker was
- loaded so that we can load its symbols and place a breakpoint
- in the dynamic linker itself.
+ loaded so that we can load its symbols and place a breakpoint
+ in the dynamic linker itself.
- This address is stored on the stack. However, I've been unable
- to find any magic formula to find it for Solaris (appears to
- be trivial on GNU/Linux). Therefore, we have to try an alternate
- mechanism to find the dynamic linker's base address. */
+ This address is stored on the stack. However, I've been unable
+ to find any magic formula to find it for Solaris (appears to
+ be trivial on GNU/Linux). Therefore, we have to try an alternate
+ mechanism to find the dynamic linker's base address. */
tmp_bfd = bfd_openr (buf, gnutarget);
if (tmp_bfd == NULL)
goto bkpt_at_symbol;
}
/* We find the dynamic linker's base address by examining the
- current pc (which point at the entry point for the dynamic
- linker) and subtracting the offset of the entry point. */
+ current pc (which point at the entry point for the dynamic
+ linker) and subtracting the offset of the entry point. */
load_addr = read_pc () - tmp_bfd->start_address;
/* Record the relocated start and end address of the dynamic linker
- text and plt section for in_svr4_dynsym_resolve_code. */
+ text and plt section for in_svr4_dynsym_resolve_code. */
interp_sect = bfd_get_section_by_name (tmp_bfd, ".text");
if (interp_sect)
{
}
/* For whatever reason we couldn't set a breakpoint in the dynamic
- linker. Warn and drop into the old code. */
-bkpt_at_symbol:
+ linker. Warn and drop into the old code. */
+ bkpt_at_symbol:
warning ("Unable to find dynamic linker breakpoint function.\nGDB will be unable to debug shared library initializers\nand track explicitly loaded dynamic code.");
}
#endif
/* Nothing good happened. */
success = 0;
-#endif /* BKPT_AT_SYMBOL */
+#endif /* BKPT_AT_SYMBOL */
-#endif /* !SVR4_SHARED_LIBS */
+#endif /* !SVR4_SHARED_LIBS */
return (success);
}
-
+
/*
-
-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 SunOS executables, this first instruction is typically the
- one at "_start", or a similar text label, regardless of whether
- the executable is statically or dynamically linked. The runtime
- startup code takes care of dynamically linking in any shared
- libraries, once gdb allows the inferior to continue.
-
- For SVR4 executables, this first instruction is either the first
- instruction in the dynamic linker (for dynamically linked
- executables) or the instruction at "start" for statically linked
- executables. For dynamically linked executables, the system
- first exec's /lib/libc.so.N, which contains the dynamic linker,
- and starts it running. The dynamic linker maps in any needed
- shared libraries, maps in the actual user executable, and then
- jumps to "start" in the user executable.
-
- For both SunOS shared libraries, and SVR4 shared libraries, we
- can arrange to cooperate with the dynamic linker to discover the
- names of shared libraries that are dynamically linked, and the
- base addresses to which they are linked.
-
- This function is responsible for discovering those names and
- addresses, and saving sufficient information about them to allow
- their symbols to be read at a later time.
-
-FIXME
-
- Between enable_break() and disable_break(), this code does not
- properly handle hitting breakpoints which the user might have
- set in the startup code or in the dynamic linker itself. Proper
- handling will probably have to wait until the implementation is
- changed to use the "breakpoint handler function" method.
-
- Also, what if child has exit()ed? Must exit loop somehow.
- */
-
-void
-solib_create_inferior_hook()
+
+ 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 SunOS executables, this first instruction is typically the
+ one at "_start", or a similar text label, regardless of whether
+ the executable is statically or dynamically linked. The runtime
+ startup code takes care of dynamically linking in any shared
+ libraries, once gdb allows the inferior to continue.
+
+ For SVR4 executables, this first instruction is either the first
+ instruction in the dynamic linker (for dynamically linked
+ executables) or the instruction at "start" for statically linked
+ executables. For dynamically linked executables, the system
+ first exec's /lib/libc.so.N, which contains the dynamic linker,
+ and starts it running. The dynamic linker maps in any needed
+ shared libraries, maps in the actual user executable, and then
+ jumps to "start" in the user executable.
+
+ For both SunOS shared libraries, and SVR4 shared libraries, we
+ can arrange to cooperate with the dynamic linker to discover the
+ names of shared libraries that are dynamically linked, and the
+ base addresses to which they are linked.
+
+ This function is responsible for discovering those names and
+ addresses, and saving sufficient information about them to allow
+ their symbols to be read at a later time.
+
+ FIXME
+
+ Between enable_break() and disable_break(), this code does not
+ properly handle hitting breakpoints which the user might have
+ set in the startup code or in the dynamic linker itself. Proper
+ handling will probably have to wait until the implementation is
+ changed to use the "breakpoint handler function" method.
+
+ Also, what if child has exit()ed? Must exit loop somehow.
+ */
+
+void
+solib_create_inferior_hook ()
{
/* If we are using the BKPT_AT_SYMBOL code, then we don't need the base
yet. In fact, in the case of a SunOS4 executable being run on
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- special_symbol_handling -- additional shared library symbol handling
+ special_symbol_handling -- additional shared library symbol handling
-SYNOPSIS
+ SYNOPSIS
- void special_symbol_handling (struct so_list *so)
+ void special_symbol_handling (struct so_list *so)
-DESCRIPTION
+ DESCRIPTION
- Once the symbols from a shared object have been loaded in the usual
- way, we are called to do any system specific symbol handling that
- is needed.
+ Once the symbols from a shared object have been loaded in the usual
+ way, we are called to do any system specific symbol handling that
+ is needed.
- For SunOS4, this consists of grunging around in the dynamic
- linkers structures to find symbol definitions for "common" symbols
- and adding them to the minimal symbol table for the runtime common
- objfile.
+ For SunOS4, this consists of grunging around in the dynamic
+ linkers structures to find symbol definitions for "common" symbols
+ and adding them to the minimal symbol table for the runtime common
+ objfile.
-*/
+ */
static void
special_symbol_handling (so)
-struct so_list *so;
+ struct so_list *so;
{
#ifndef SVR4_SHARED_LIBS
int j;
/* Calc address of debugger interface structure */
/* FIXME, this needs work for cross-debugging of core files
- (byteorder, size, alignment, etc). */
+ (byteorder, size, alignment, etc). */
debug_addr = (CORE_ADDR) dynamic_copy.ldd;
}
j = target_read_memory (debug_addr, (char *) &debug_copy,
sizeof (debug_copy));
if (j)
- return; /* unreadable */
+ return; /* unreadable */
/* Get common symbol definitions for the loaded object. */
solib_add_common_symbols (debug_copy.ldd_cp);
}
-#endif /* !SVR4_SHARED_LIBS */
+#endif /* !SVR4_SHARED_LIBS */
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- sharedlibrary_command -- handle command to explicitly add library
+ sharedlibrary_command -- handle command to explicitly add library
-SYNOPSIS
+ SYNOPSIS
- static void sharedlibrary_command (char *args, int from_tty)
+ static void sharedlibrary_command (char *args, int from_tty)
-DESCRIPTION
+ DESCRIPTION
-*/
+ */
static void
sharedlibrary_command (args, from_tty)
-char *args;
-int from_tty;
+ char *args;
+ int from_tty;
{
dont_repeat ();
solib_add (args, from_tty, (struct target_ops *) 0);
#endif /* HAVE_LINK_H */
void
-_initialize_solib()
+_initialize_solib ()
{
#ifdef HAVE_LINK_H
add_com ("sharedlibrary", class_files, sharedlibrary_command,
"Load shared object library symbols for files matching REGEXP.");
- add_info ("sharedlibrary", info_sharedlibrary_command,
+ add_info ("sharedlibrary", info_sharedlibrary_command,
"Status of loaded shared object libraries.");
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