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authorPedro Alves <palves@redhat.com>2009-06-03 18:50:36 +0000
committerPedro Alves <palves@redhat.com>2009-06-03 18:50:36 +0000
commit07b82ea5f9396811815e8085a4cce5ca03f50fb5 (patch)
tree528772b8131a21e8de911a9e68a4c78a780c8dd3 /gdb
parent4fa62494657f9b422edd7049c7207bd6c6849c3f (diff)
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* target.c: Include "exec.h".
(update_current_target): Don't inherit to_sections or to_sections_end. (target_get_section_table): New. (target_section_by_addr): Fetch the section table from the passed in target. (memory_xfer_partial): Handle unmapped overlay sections before anything else. Get the overlay mapped address here. Adjust to use section_table_xfer_memory_partial. (get_target_memory): Request a TARGET_OBJECT_RAW_MEMORY object instead of TARGET_OBJECT_MEMORY. (target_resize_to_sections): Delete. (remove_target_sections): Adjust to remove target sections from `current_target_sections', and use resize_section_table. * target.h (struct target_ops) <to_sections, to_sections_end>: Remove fields. <to_get_section_table>: New method. (xfer_memory, print_section_info): Delete declarations. (struct target_section_table): New type. (target_get_section_table): Declare. (target_resize_to_sections): Delete declaration. (remove_target_sections): Delete declaration. * bfd-target.c (target_bfd_xfer_partial): Get the section table from to_data. (target_bfd_get_section_table): New. (target_bfd_xclose): Adjust. (target_bfd_reopen): Store the section table in the to_data field. * corelow.c (core_data): New. (core_close): Adjust to release core_data and its sections. (core_open): Allocate core_data, and build its target sections table. (deprecated_core_resize_section_table): New. (core_files_info): Pass core_data to print_section_info. (core_xfer_partial): Adjust to use section_table_xfer_memory_partial for TARGET_OBJECT_MEMORY xfers. (init_core_ops): Do not install a deprecated_xfer_memory callback anymore. * solib.c (update_solib_list): Add the shared library sections to the current target sections table. * exec.c (current_target_sections_1): New global. (current_target_sections): New global. (exec_close_1): New function, refactored from exec_close. Remove the exec_bfd's sections from the current target sections table. Adjust to not use to_sections. (exec_close): Remove all target sections. Call exec_close_1. (exec_file_clear): Use exec_close_1 instead of unpushing the target. (exec_file_attach): Likewise. Adjust to not use to_sections. Add exec_bfd's sections to the current target sections table. Don't push the exec_ops target here. (resize_section_table): New. (add_target_sections): New. (remove_target_sections): Moved here. (section_table_xfer_memory): Adjust to implement the xfer_partial interface, and rename to... (section_table_xfer_memory_partial): ... this, replacing the current function of that same name. (exec_get_section_table): New. (exec_xfer_partial): New. (xfer_memory): Delete. (print_section_info): Replace the target_ops parameter by a target_section_table parameter. (exec_files_info, set_section_command, exec_set_section_address): Adjust to use the current sections table. (init_exec_ops): Do not register a deprecated_xfer_memory callback. Register to_xfer_partial and to_get_section_table callbacks. * infrun.c (handle_inferior_event): Update comments around solib_add. * rs6000-nat.c (xcoff_relocate_core): Adjust to use deprecated_core_resize_section_table. * exec.h (resize_section_table): Declare. (section_table_xfer_memory_partial): Add const char * argument. (remove_target_sections): Declare here. (add_target_sections): Declare. (print_section_info): Declare here. * gdbcore.h (deprecated_core_resize_section_table): Declare.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog80
-rw-r--r--gdb/bfd-target.c37
-rw-r--r--gdb/corelow.c56
-rw-r--r--gdb/exec.c288
-rw-r--r--gdb/exec.h26
-rw-r--r--gdb/gdbcore.h2
-rw-r--r--gdb/infrun.c18
-rw-r--r--gdb/rs6000-nat.c3
-rw-r--r--gdb/solib.c20
-rw-r--r--gdb/target.c163
-rw-r--r--gdb/target.h32
11 files changed, 434 insertions, 291 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 11bf9ca..13486a4 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,83 @@
+2009-06-03 Pedro Alves <pedro@codesourcery.com>
+
+ * target.c: Include "exec.h".
+ (update_current_target): Don't inherit to_sections or
+ to_sections_end.
+ (target_get_section_table): New.
+ (target_section_by_addr): Fetch the section table from the passed
+ in target.
+ (memory_xfer_partial): Handle unmapped overlay sections before
+ anything else. Get the overlay mapped address here. Adjust to
+ use section_table_xfer_memory_partial.
+ (get_target_memory): Request a TARGET_OBJECT_RAW_MEMORY object
+ instead of TARGET_OBJECT_MEMORY.
+ (target_resize_to_sections): Delete.
+ (remove_target_sections): Adjust to remove target sections from
+ `current_target_sections', and use resize_section_table.
+ * target.h (struct target_ops) <to_sections, to_sections_end>:
+ Remove fields.
+ <to_get_section_table>: New method.
+ (xfer_memory, print_section_info): Delete declarations.
+ (struct target_section_table): New type.
+ (target_get_section_table): Declare.
+ (target_resize_to_sections): Delete declaration.
+ (remove_target_sections): Delete declaration.
+ * bfd-target.c (target_bfd_xfer_partial): Get the section table
+ from to_data.
+ (target_bfd_get_section_table): New.
+ (target_bfd_xclose): Adjust.
+ (target_bfd_reopen): Store the section table in the to_data field.
+ * corelow.c (core_data): New.
+ (core_close): Adjust to release core_data and its sections.
+ (core_open): Allocate core_data, and build its target sections
+ table.
+ (deprecated_core_resize_section_table): New.
+ (core_files_info): Pass core_data to print_section_info.
+ (core_xfer_partial): Adjust to use
+ section_table_xfer_memory_partial for TARGET_OBJECT_MEMORY xfers.
+ (init_core_ops): Do not install a deprecated_xfer_memory callback
+ anymore.
+ * solib.c (update_solib_list): Add the shared library sections
+ to the current target sections table.
+ * exec.c (current_target_sections_1): New global.
+ (current_target_sections): New global.
+ (exec_close_1): New function, refactored from exec_close. Remove
+ the exec_bfd's sections from the current target sections table.
+ Adjust to not use to_sections.
+ (exec_close): Remove all target sections. Call exec_close_1.
+ (exec_file_clear): Use exec_close_1 instead of unpushing the
+ target.
+ (exec_file_attach): Likewise. Adjust to not use to_sections. Add
+ exec_bfd's sections to the current target sections table. Don't
+ push the exec_ops target here.
+ (resize_section_table): New.
+ (add_target_sections): New.
+ (remove_target_sections): Moved here.
+ (section_table_xfer_memory): Adjust to implement the xfer_partial
+ interface, and rename to...
+ (section_table_xfer_memory_partial): ... this, replacing the
+ current function of that same name.
+ (exec_get_section_table): New.
+ (exec_xfer_partial): New.
+ (xfer_memory): Delete.
+ (print_section_info): Replace the target_ops parameter by a
+ target_section_table parameter.
+ (exec_files_info, set_section_command, exec_set_section_address):
+ Adjust to use the current sections table.
+ (init_exec_ops): Do not register a deprecated_xfer_memory
+ callback. Register to_xfer_partial and to_get_section_table
+ callbacks.
+ * infrun.c (handle_inferior_event): Update comments around
+ solib_add.
+ * rs6000-nat.c (xcoff_relocate_core): Adjust to use
+ deprecated_core_resize_section_table.
+ * exec.h (resize_section_table): Declare.
+ (section_table_xfer_memory_partial): Add const char * argument.
+ (remove_target_sections): Declare here.
+ (add_target_sections): Declare.
+ (print_section_info): Declare here.
+ * gdbcore.h (deprecated_core_resize_section_table): Declare.
+
2009-06-03 Ulrich Weigand <uweigand@de.ibm.com>
* value.h (struct internalvar): Remove.
diff --git a/gdb/bfd-target.c b/gdb/bfd-target.c
index 3eaae84..ffaa4ff 100644
--- a/gdb/bfd-target.c
+++ b/gdb/bfd-target.c
@@ -32,35 +32,52 @@ target_bfd_xfer_partial (struct target_ops *ops,
switch (object)
{
case TARGET_OBJECT_MEMORY:
- return section_table_xfer_memory_partial (readbuf, writebuf, offset, len,
- ops->to_sections,
- ops->to_sections_end);
+ {
+ struct target_section_table *table = ops->to_data;
+ return section_table_xfer_memory_partial (readbuf, writebuf, offset, len,
+ table->sections,
+ table->sections_end,
+ NULL);
+ }
default:
return -1;
}
}
+static struct target_section_table *
+target_bfd_get_section_table (struct target_ops *ops)
+{
+ return ops->to_data;
+}
+
static void
target_bfd_xclose (struct target_ops *t, int quitting)
{
- bfd_close (t->to_data);
- xfree (t->to_sections);
+ struct target_section_table *table = t->to_data;
+ if (table->sections)
+ bfd_close (table->sections->bfd);
+ xfree (table->sections);
+ xfree (table);
xfree (t);
}
struct target_ops *
target_bfd_reopen (struct bfd *bfd)
{
- struct target_ops *t = XZALLOC (struct target_ops);
+ struct target_ops *t;
+ struct target_section_table *table;
+
+ table = XZALLOC (struct target_section_table);
+ build_section_table (bfd, &table->sections, &table->sections_end);
+
+ t = XZALLOC (struct target_ops);
t->to_shortname = "bfd";
t->to_longname = _("BFD backed target");
t->to_doc = _("You should never see this");
+ t->to_get_section_table = target_bfd_get_section_table;
t->to_xfer_partial = target_bfd_xfer_partial;
t->to_xclose = target_bfd_xclose;
- t->to_data = bfd;
+ t->to_data = table;
- build_section_table (bfd,
- &t->to_sections,
- &t->to_sections_end);
return t;
}
diff --git a/gdb/corelow.c b/gdb/corelow.c
index ffaf04c..947fe1f 100644
--- a/gdb/corelow.c
+++ b/gdb/corelow.c
@@ -67,6 +67,14 @@ static struct core_fns *core_vec = NULL;
struct gdbarch *core_gdbarch = NULL;
+/* Per-core data. Currently, only the section table. Note that these
+ target sections are *not* mapped in the current address spaces' set
+ of target sections --- those should come only from pure executable
+ or shared library bfds. The core bfd sections are an
+ implementation detail of the core target, just like ptrace is for
+ unix child targets. */
+static struct target_section_table *core_data;
+
static void core_files_info (struct target_ops *);
static struct core_fns *sniff_core_bfd (bfd *);
@@ -203,18 +211,16 @@ core_close (int quitting)
comments in clear_solib in solib.c. */
clear_solib ();
+ xfree (core_data->sections);
+ xfree (core_data);
+ core_data = NULL;
+
name = bfd_get_filename (core_bfd);
if (!bfd_close (core_bfd))
warning (_("cannot close \"%s\": %s"),
name, bfd_errmsg (bfd_get_error ()));
xfree (name);
core_bfd = NULL;
- if (core_ops.to_sections)
- {
- xfree (core_ops.to_sections);
- core_ops.to_sections = NULL;
- core_ops.to_sections_end = NULL;
- }
}
core_vec = NULL;
core_gdbarch = NULL;
@@ -347,9 +353,11 @@ core_open (char *filename, int from_tty)
validate_files ();
+ core_data = XZALLOC (struct target_section_table);
+
/* Find the data section */
- if (build_section_table (core_bfd, &core_ops.to_sections,
- &core_ops.to_sections_end))
+ if (build_section_table (core_bfd,
+ &core_data->sections, &core_data->sections_end))
error (_("\"%s\": Can't find sections: %s"),
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
@@ -434,6 +442,23 @@ core_detach (struct target_ops *ops, char *args, int from_tty)
printf_filtered (_("No core file now.\n"));
}
+#ifdef DEPRECATED_IBM6000_TARGET
+
+/* Resize the core memory's section table, by NUM_ADDED. Returns a
+ pointer into the first new slot. This will not be necessary when
+ the rs6000 target is converted to use the standard solib
+ framework. */
+
+struct target_section *
+deprecated_core_resize_section_table (int num_added)
+{
+ int old_count;
+
+ old_count = resize_section_table (core_data, num_added);
+ return core_data->sections + old_count;
+}
+
+#endif
/* Try to retrieve registers from a section in core_bfd, and supply
them to core_vec->core_read_registers, as the register set numbered
@@ -562,7 +587,7 @@ get_core_registers (struct target_ops *ops,
static void
core_files_info (struct target_ops *t)
{
- print_section_info (t, core_bfd);
+ print_section_info (core_data, core_bfd);
}
static LONGEST
@@ -573,13 +598,11 @@ core_xfer_partial (struct target_ops *ops, enum target_object object,
switch (object)
{
case TARGET_OBJECT_MEMORY:
- if (readbuf)
- return (*ops->deprecated_xfer_memory) (offset, readbuf,
- len, 0/*read*/, NULL, ops);
- if (writebuf)
- return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf,
- len, 1/*write*/, NULL, ops);
- return -1;
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ offset, len,
+ core_data->sections,
+ core_data->sections_end,
+ NULL);
case TARGET_OBJECT_AUXV:
if (readbuf)
@@ -738,7 +761,6 @@ init_core_ops (void)
core_ops.to_detach = core_detach;
core_ops.to_fetch_registers = get_core_registers;
core_ops.to_xfer_partial = core_xfer_partial;
- core_ops.deprecated_xfer_memory = xfer_memory;
core_ops.to_files_info = core_files_info;
core_ops.to_insert_breakpoint = ignore;
core_ops.to_remove_breakpoint = ignore;
diff --git a/gdb/exec.c b/gdb/exec.c
index 985fbe5..358992c 100644
--- a/gdb/exec.c
+++ b/gdb/exec.c
@@ -71,6 +71,16 @@ struct target_ops exec_ops;
bfd *exec_bfd = NULL;
long exec_bfd_mtime = 0;
+/* GDB currently only supports a single symbol/address space for the
+ whole debug session. When that limitation is lifted, this global
+ goes away. */
+static struct target_section_table current_target_sections_1;
+
+/* The set of target sections matching the sections mapped into the
+ current inferior's address space. */
+static struct target_section_table *current_target_sections
+ = &current_target_sections_1;
+
/* Whether to open exec and core files read-only or read-write. */
int write_files = 0;
@@ -92,6 +102,31 @@ exec_open (char *args, int from_tty)
exec_file_attach (args, from_tty);
}
+/* Close and clear exec_bfd. If we end up with no target sections to
+ read memory from, this unpushes the exec_ops target. */
+
+static void
+exec_close_1 (void)
+{
+ if (exec_bfd)
+ {
+ bfd *abfd = exec_bfd;
+ char *name = bfd_get_filename (abfd);
+
+ if (!bfd_close (abfd))
+ warning (_("cannot close \"%s\": %s"),
+ name, bfd_errmsg (bfd_get_error ()));
+ xfree (name);
+
+ /* Removing target sections may close the exec_ops target.
+ Clear exec_bfd before doing so to prevent recursion. */
+ exec_bfd = NULL;
+ exec_bfd_mtime = 0;
+
+ remove_target_sections (abfd);
+ }
+}
+
static void
exec_close (int quitting)
{
@@ -128,31 +163,20 @@ exec_close (int quitting)
vmap = NULL;
- if (exec_bfd)
- {
- char *name = bfd_get_filename (exec_bfd);
+ /* Delete all target sections. */
+ resize_section_table
+ (current_target_sections,
+ -resize_section_table (current_target_sections, 0));
- if (!bfd_close (exec_bfd))
- warning (_("cannot close \"%s\": %s"),
- name, bfd_errmsg (bfd_get_error ()));
- xfree (name);
- exec_bfd = NULL;
- exec_bfd_mtime = 0;
- }
-
- if (exec_ops.to_sections)
- {
- xfree (exec_ops.to_sections);
- exec_ops.to_sections = NULL;
- exec_ops.to_sections_end = NULL;
- }
+ /* Remove exec file. */
+ exec_close_1 ();
}
void
exec_file_clear (int from_tty)
{
/* Remove exec file. */
- unpush_target (&exec_ops);
+ exec_close_1 ();
if (from_tty)
printf_unfiltered (_("No executable file now.\n"));
@@ -179,7 +203,7 @@ void
exec_file_attach (char *filename, int from_tty)
{
/* Remove any previous exec file. */
- unpush_target (&exec_ops);
+ exec_close_1 ();
/* Now open and digest the file the user requested, if any. */
@@ -195,6 +219,7 @@ exec_file_attach (char *filename, int from_tty)
struct cleanup *cleanups;
char *scratch_pathname;
int scratch_chan;
+ struct target_section *sections = NULL, *sections_end = NULL;
scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename,
write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
@@ -233,7 +258,7 @@ exec_file_attach (char *filename, int from_tty)
{
/* Make sure to close exec_bfd, or else "run" might try to use
it. */
- exec_close (0);
+ exec_close_1 ();
error (_("\"%s\": not in executable format: %s"),
scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
@@ -248,18 +273,17 @@ exec_file_attach (char *filename, int from_tty)
{
/* Make sure to close exec_bfd, or else "run" might try to use
it. */
- exec_close (0);
+ exec_close_1 ();
error (_("\"%s\": can't find the file sections: %s"),
scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
#endif /* DEPRECATED_IBM6000_TARGET */
- if (build_section_table (exec_bfd, &exec_ops.to_sections,
- &exec_ops.to_sections_end))
+ if (build_section_table (exec_bfd, &sections, &sections_end))
{
/* Make sure to close exec_bfd, or else "run" might try to use
it. */
- exec_close (0);
+ exec_close_1 ();
error (_("\"%s\": can't find the file sections: %s"),
scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
@@ -270,7 +294,10 @@ exec_file_attach (char *filename, int from_tty)
set_gdbarch_from_file (exec_bfd);
- push_target (&exec_ops);
+ /* Add the executable's sections to the current address spaces'
+ list of sections. */
+ add_target_sections (sections, sections_end);
+ xfree (sections);
/* Tell display code (if any) about the changed file name. */
if (deprecated_exec_file_display_hook)
@@ -370,6 +397,33 @@ add_to_section_table (bfd *abfd, struct bfd_section *asect,
(*table_pp)++;
}
+int
+resize_section_table (struct target_section_table *table, int num_added)
+{
+ struct target_section *old_value;
+ int old_count;
+ int new_count;
+
+ old_value = table->sections;
+ old_count = table->sections_end - table->sections;
+
+ new_count = num_added + old_count;
+
+ if (new_count)
+ {
+ table->sections = xrealloc (table->sections,
+ sizeof (struct target_section) * new_count);
+ table->sections_end = table->sections + new_count;
+ }
+ else
+ {
+ xfree (table->sections);
+ table->sections = table->sections_end = NULL;
+ }
+
+ return old_count;
+}
+
/* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
Returns 0 if OK, 1 on error. */
@@ -390,6 +444,65 @@ build_section_table (struct bfd *some_bfd, struct target_section **start,
/* We could realloc the table, but it probably loses for most files. */
return 0;
}
+
+/* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
+ current set of target sections. */
+
+void
+add_target_sections (struct target_section *sections,
+ struct target_section *sections_end)
+{
+ int count;
+ struct target_section_table *table = current_target_sections;
+
+ count = sections_end - sections;
+
+ if (count > 0)
+ {
+ int space = resize_section_table (table, count);
+ memcpy (table->sections + space,
+ sections, count * sizeof (sections[0]));
+
+ /* If these are the first file sections we can provide memory
+ from, push the file_stratum target. */
+ if (space == 0)
+ push_target (&exec_ops);
+ }
+}
+
+/* Remove all target sections taken from ABFD. */
+
+void
+remove_target_sections (bfd *abfd)
+{
+ struct target_section *src, *dest;
+
+ struct target_section_table *table = current_target_sections;
+
+ dest = table->sections;
+ for (src = table->sections; src < table->sections_end; src++)
+ if (src->bfd != abfd)
+ {
+ /* Keep this section. */
+ if (dest < src)
+ *dest = *src;
+ dest++;
+ }
+
+ /* If we've dropped any sections, resize the section table. */
+ if (dest < src)
+ {
+ int old_count;
+
+ old_count = resize_section_table (table, dest - src);
+
+ /* If we don't have any more sections to read memory from,
+ remove the file_stratum target from the stack. */
+ if (old_count + (dest - src) == 0)
+ unpush_target (&exec_ops);
+ }
+}
+
static void
bfdsec_to_vmap (struct bfd *abfd, struct bfd_section *sect, void *arg3)
@@ -467,22 +580,21 @@ map_vmap (bfd *abfd, bfd *arch)
< 0: We cannot handle this address, but if somebody
else handles (-N) bytes, we can start from there. */
-static int
-section_table_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr,
- int len, int write,
- struct target_section *sections,
- struct target_section *sections_end,
- const char *section_name)
+int
+section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len,
+ struct target_section *sections,
+ struct target_section *sections_end,
+ const char *section_name)
{
int res;
struct target_section *p;
- CORE_ADDR nextsectaddr, memend;
+ ULONGEST memaddr = offset;
+ ULONGEST memend = memaddr + len;
if (len <= 0)
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
- memend = memaddr + len;
- nextsectaddr = memend;
for (p = sections; p < sections_end; p++)
{
@@ -493,13 +605,13 @@ section_table_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr,
if (memend <= p->endaddr)
{
/* Entire transfer is within this section. */
- if (write)
+ if (writebuf)
res = bfd_set_section_contents (p->bfd, p->the_bfd_section,
- myaddr, memaddr - p->addr,
+ writebuf, memaddr - p->addr,
len);
else
res = bfd_get_section_contents (p->bfd, p->the_bfd_section,
- myaddr, memaddr - p->addr,
+ readbuf, memaddr - p->addr,
len);
return (res != 0) ? len : 0;
}
@@ -512,90 +624,49 @@ section_table_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr,
{
/* This section overlaps the transfer. Just do half. */
len = p->endaddr - memaddr;
- if (write)
+ if (writebuf)
res = bfd_set_section_contents (p->bfd, p->the_bfd_section,
- myaddr, memaddr - p->addr,
+ writebuf, memaddr - p->addr,
len);
else
res = bfd_get_section_contents (p->bfd, p->the_bfd_section,
- myaddr, memaddr - p->addr,
+ readbuf, memaddr - p->addr,
len);
return (res != 0) ? len : 0;
}
}
- else
- nextsectaddr = min (nextsectaddr, p->addr);
}
- if (nextsectaddr >= memend)
- return 0; /* We can't help */
- else
- return -(nextsectaddr - memaddr); /* Next boundary where we can help */
+ return 0; /* We can't help */
}
-int
-section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len,
- struct target_section *sections,
- struct target_section *sections_end)
+struct target_section_table *
+exec_get_section_table (struct target_ops *ops)
{
- if (readbuf != NULL)
- return section_table_xfer_memory (offset, readbuf, len, 0,
- sections, sections_end, NULL);
- else
- return section_table_xfer_memory (offset, (gdb_byte *) writebuf, len, 1,
- sections, sections_end, NULL);
+ return current_target_sections;
}
-/* Read or write the exec file.
-
- Args are address within a BFD file, address within gdb address-space,
- length, and a flag indicating whether to read or write.
-
- Result is a length:
-
- 0: We cannot handle this address and length.
- > 0: We have handled N bytes starting at this address.
- (If N == length, we did it all.) We might be able
- to handle more bytes beyond this length, but no
- promises.
- < 0: We cannot handle this address, but if somebody
- else handles (-N) bytes, we can start from there.
-
- The same routine is used to handle both core and exec files;
- we just tail-call it with more arguments to select between them. */
-
-int
-xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
- struct mem_attrib *attrib, struct target_ops *target)
+static LONGEST
+exec_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
{
- int res;
- const char *section_name = NULL;
-
- if (len <= 0)
- internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
-
- if (overlay_debugging)
- {
- struct obj_section *section = find_pc_overlay (memaddr);
-
- if (section != NULL)
- {
- if (pc_in_unmapped_range (memaddr, section))
- memaddr = overlay_mapped_address (memaddr, section);
- section_name = section->the_bfd_section->name;
- }
- }
-
- return section_table_xfer_memory (memaddr, myaddr, len, write,
- target->to_sections,
- target->to_sections_end,
- section_name);
+ struct target_section_table *table = target_get_section_table (ops);
+
+ if (object == TARGET_OBJECT_MEMORY)
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ offset, len,
+ table->sections,
+ table->sections_end,
+ NULL);
+ else
+ return -1;
}
void
-print_section_info (struct target_ops *t, bfd *abfd)
+print_section_info (struct target_section_table *t, bfd *abfd)
{
struct target_section *p;
/* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
@@ -607,7 +678,7 @@ print_section_info (struct target_ops *t, bfd *abfd)
if (abfd == exec_bfd)
printf_filtered (_("\tEntry point: %s\n"),
paddress (bfd_get_start_address (abfd)));
- for (p = t->to_sections; p < t->to_sections_end; p++)
+ for (p = t->sections; p < t->sections_end; p++)
{
printf_filtered ("\t%s", hex_string_custom (p->addr, wid));
printf_filtered (" - %s", hex_string_custom (p->endaddr, wid));
@@ -631,7 +702,7 @@ print_section_info (struct target_ops *t, bfd *abfd)
static void
exec_files_info (struct target_ops *t)
{
- print_section_info (t, exec_bfd);
+ print_section_info (current_target_sections, exec_bfd);
if (vmap)
{
@@ -667,6 +738,7 @@ set_section_command (char *args, int from_tty)
unsigned long secaddr;
char secprint[100];
long offset;
+ struct target_section_table *table;
if (args == 0)
error (_("Must specify section name and its virtual address"));
@@ -678,7 +750,8 @@ set_section_command (char *args, int from_tty)
/* Parse out new virtual address */
secaddr = parse_and_eval_address (args);
- for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++)
+ table = current_target_sections;
+ for (p = table->sections; p < table->sections_end; p++)
{
if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen)
&& bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0')
@@ -705,8 +778,10 @@ void
exec_set_section_address (const char *filename, int index, CORE_ADDR address)
{
struct target_section *p;
+ struct target_section_table *table;
- for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++)
+ table = current_target_sections;
+ for (p = table->sections; p < table->sections_end; p++)
{
if (strcmp (filename, p->bfd->filename) == 0
&& index == p->the_bfd_section->index)
@@ -754,7 +829,8 @@ Specify the filename of the executable file.";
exec_ops.to_open = exec_open;
exec_ops.to_close = exec_close;
exec_ops.to_attach = find_default_attach;
- exec_ops.deprecated_xfer_memory = xfer_memory;
+ exec_ops.to_xfer_partial = exec_xfer_partial;
+ exec_ops.to_get_section_table = exec_get_section_table;
exec_ops.to_files_info = exec_files_info;
exec_ops.to_insert_breakpoint = ignore;
exec_ops.to_remove_breakpoint = ignore;
diff --git a/gdb/exec.h b/gdb/exec.h
index c33faa7..72b385c 100644
--- a/gdb/exec.h
+++ b/gdb/exec.h
@@ -34,6 +34,11 @@ extern struct target_ops exec_ops;
extern int build_section_table (struct bfd *, struct target_section **,
struct target_section **);
+/* Resize the section table held by TABLE, by NUM_ADDED. Returns the
+ old size. */
+
+extern int resize_section_table (struct target_section_table *, int);
+
/* Request to transfer up to LEN 8-bit bytes of the target sections
defined by SECTIONS and SECTIONS_END. The OFFSET specifies the
starting address.
@@ -50,9 +55,28 @@ extern int build_section_table (struct bfd *, struct target_section **,
extern int section_table_xfer_memory_partial (gdb_byte *, const gdb_byte *,
ULONGEST, LONGEST,
struct target_section *,
- struct target_section *);
+ struct target_section *,
+ const char *);
/* Set the loaded address of a section. */
extern void exec_set_section_address (const char *, int, CORE_ADDR);
+/* Remove all target sections taken from ABFD. */
+
+extern void remove_target_sections (bfd *abfd);
+
+/* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
+ current set of target sections. */
+
+extern void add_target_sections (struct target_section *sections,
+ struct target_section *sections_end);
+
+/* Prints info about all sections defined in the TABLE. ABFD is
+ special cased --- it's filename is omitted; if it is the executable
+ file, its entry point is printed. */
+
+extern void print_section_info (struct target_section_table *table,
+ bfd *abfd);
+
+
#endif
diff --git a/gdb/gdbcore.h b/gdb/gdbcore.h
index 8dda642..ec3e1a8 100644
--- a/gdb/gdbcore.h
+++ b/gdb/gdbcore.h
@@ -189,4 +189,6 @@ extern void deprecated_add_core_fns (struct core_fns *cf);
extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
extern int default_check_format (bfd * abfd);
+struct target_section *deprecated_core_resize_section_table (int num_added);
+
#endif /* !defined (GDBCORE_H) */
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 3540acf..d044772 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -2448,15 +2448,6 @@ handle_inferior_event (struct execution_control_state *ecs)
operations such as address => section name and hence
require the table to contain all sections (including
those found in shared libraries). */
- /* NOTE: cagney/2003-11-25: Pass current_target and not
- exec_ops to SOLIB_ADD. This is because current GDB is
- only tooled to propagate section_table changes out from
- the "current_target" (see target_resize_to_sections), and
- not up from the exec stratum. This, of course, isn't
- right. "infrun.c" should only interact with the
- exec/process stratum, instead relying on the target stack
- to propagate relevant changes (stop, section table
- changed, ...) up to other layers. */
#ifdef SOLIB_ADD
SOLIB_ADD (NULL, 0, &current_target, auto_solib_add);
#else
@@ -3446,15 +3437,6 @@ infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME (!gdbarch_get_longjmp_target)\n");
operations such as address => section name and hence
require the table to contain all sections (including
those found in shared libraries). */
- /* NOTE: cagney/2003-11-25: Pass current_target and not
- exec_ops to SOLIB_ADD. This is because current GDB is
- only tooled to propagate section_table changes out from
- the "current_target" (see target_resize_to_sections), and
- not up from the exec stratum. This, of course, isn't
- right. "infrun.c" should only interact with the
- exec/process stratum, instead relying on the target stack
- to propagate relevant changes (stop, section table
- changed, ...) up to other layers. */
#ifdef SOLIB_ADD
SOLIB_ADD (NULL, 0, &current_target, auto_solib_add);
#else
diff --git a/gdb/rs6000-nat.c b/gdb/rs6000-nat.c
index c1e3b47..a786657 100644
--- a/gdb/rs6000-nat.c
+++ b/gdb/rs6000-nat.c
@@ -1160,8 +1160,7 @@ xcoff_relocate_core (struct target_ops *target)
{
struct target_section *stp;
- target_resize_to_sections (target, 2);
- stp = target->to_sections_end - 2;
+ stp = deprecated_core_resize_section_table (2);
stp->bfd = vp->bfd;
stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
diff --git a/gdb/solib.c b/gdb/solib.c
index 9eebd48..a434ece 100644
--- a/gdb/solib.c
+++ b/gdb/solib.c
@@ -661,21 +661,11 @@ update_solib_list (int from_tty, struct target_ops *target)
"Error while mapping shared library sections:\n",
RETURN_MASK_ALL);
- /* If requested, add the shared object's sections to the TARGET's
- section table. Do this immediately after mapping the object so
- that later nodes in the list can query this object, as is needed
- in solib-osf.c. */
- if (target)
- {
- int count = (i->sections_end - i->sections);
- if (count > 0)
- {
- int space = target_resize_to_sections (target, count);
- memcpy (target->to_sections + space,
- i->sections,
- count * sizeof (i->sections[0]));
- }
- }
+ /* Add the shared object's sections to the current set of
+ file section tables. Do this immediately after mapping
+ the object so that later nodes in the list can query this
+ object, as is needed in solib-osf.c. */
+ add_target_sections (i->sections, i->sections_end);
/* Notify any observer that the shared object has been
loaded now that we've added it to GDB's tables. */
diff --git a/gdb/target.c b/gdb/target.c
index 6a180f3..8de1be8 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -41,6 +41,7 @@
#include "target-descriptions.h"
#include "gdbthread.h"
#include "solib.h"
+#include "exec.h"
static void target_info (char *, int);
@@ -491,8 +492,6 @@ update_current_target (void)
INHERIT (to_has_registers, t);
INHERIT (to_has_execution, t);
INHERIT (to_has_thread_control, t);
- INHERIT (to_sections, t);
- INHERIT (to_sections_end, t);
INHERIT (to_can_async_p, t);
INHERIT (to_is_async_p, t);
INHERIT (to_async, t);
@@ -1016,14 +1015,33 @@ done:
return nbytes_read;
}
+struct target_section_table *
+target_get_section_table (struct target_ops *target)
+{
+ struct target_ops *t;
+
+ if (targetdebug)
+ fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
+
+ for (t = target; t != NULL; t = t->beneath)
+ if (t->to_get_section_table != NULL)
+ return (*t->to_get_section_table) (t);
+
+ return NULL;
+}
+
/* Find a section containing ADDR. */
+
struct target_section *
target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
{
+ struct target_section_table *table = target_get_section_table (target);
struct target_section *secp;
- for (secp = target->to_sections;
- secp < target->to_sections_end;
- secp++)
+
+ if (table == NULL)
+ return NULL;
+
+ for (secp = table->sections; secp < table->sections_end; secp++)
{
if (addr >= secp->addr && addr < secp->endaddr)
return secp;
@@ -1046,24 +1064,43 @@ memory_xfer_partial (struct target_ops *ops, void *readbuf, const void *writebuf
if (len == 0)
return 0;
- /* Try the executable file, if "trust-readonly-sections" is set. */
+ /* For accesses to unmapped overlay sections, read directly from
+ files. Must do this first, as MEMADDR may need adjustment. */
+ if (readbuf != NULL && overlay_debugging)
+ {
+ struct obj_section *section = find_pc_overlay (memaddr);
+ if (pc_in_unmapped_range (memaddr, section))
+ {
+ struct target_section_table *table
+ = target_get_section_table (ops);
+ const char *section_name = section->the_bfd_section->name;
+ memaddr = overlay_mapped_address (memaddr, section);
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ memaddr, len,
+ table->sections,
+ table->sections_end,
+ section_name);
+ }
+ }
+
+ /* Try the executable files, if "trust-readonly-sections" is set. */
if (readbuf != NULL && trust_readonly)
{
struct target_section *secp;
+ struct target_section_table *table;
secp = target_section_by_addr (ops, memaddr);
if (secp != NULL
&& (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
& SEC_READONLY))
- return xfer_memory (memaddr, readbuf, len, 0, NULL, ops);
- }
-
- /* Likewise for accesses to unmapped overlay sections. */
- if (readbuf != NULL && overlay_debugging)
- {
- struct obj_section *section = find_pc_overlay (memaddr);
- if (pc_in_unmapped_range (memaddr, section))
- return xfer_memory (memaddr, readbuf, len, 0, NULL, ops);
+ {
+ table = target_get_section_table (ops);
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ memaddr, len,
+ table->sections,
+ table->sections_end,
+ NULL);
+ }
}
/* Try GDB's internal data cache. */
@@ -1688,7 +1725,11 @@ void
get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
LONGEST len)
{
- if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, buf, addr, len)
+ /* This method is used to read from an alternate, non-current
+ target. This read must bypass the overlay support (as symbols
+ don't match this target), and GDB's internal cache (wrong cache
+ for this target). */
+ if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
!= len)
memory_error (EIO, addr);
}
@@ -2338,96 +2379,6 @@ return_minus_one (void)
return -1;
}
-/*
- * Resize the to_sections pointer. Also make sure that anyone that
- * was holding on to an old value of it gets updated.
- * Returns the old size.
- */
-
-int
-target_resize_to_sections (struct target_ops *target, int num_added)
-{
- struct target_ops **t;
- struct target_section *old_value;
- int old_count;
-
- old_value = target->to_sections;
-
- if (target->to_sections)
- {
- old_count = target->to_sections_end - target->to_sections;
- target->to_sections = (struct target_section *)
- xrealloc ((char *) target->to_sections,
- (sizeof (struct target_section)) * (num_added + old_count));
- }
- else
- {
- old_count = 0;
- target->to_sections = (struct target_section *)
- xmalloc ((sizeof (struct target_section)) * num_added);
- }
- target->to_sections_end = target->to_sections + (num_added + old_count);
-
- /* Check to see if anyone else was pointing to this structure.
- If old_value was null, then no one was. */
-
- if (old_value)
- {
- for (t = target_structs; t < target_structs + target_struct_size;
- ++t)
- {
- if ((*t)->to_sections == old_value)
- {
- (*t)->to_sections = target->to_sections;
- (*t)->to_sections_end = target->to_sections_end;
- }
- }
- /* There is a flattened view of the target stack in current_target,
- so its to_sections pointer might also need updating. */
- if (current_target.to_sections == old_value)
- {
- current_target.to_sections = target->to_sections;
- current_target.to_sections_end = target->to_sections_end;
- }
- }
-
- return old_count;
-
-}
-
-/* Remove all target sections taken from ABFD.
-
- Scan the current target stack for targets whose section tables
- refer to sections from BFD, and remove those sections. We use this
- when we notice that the inferior has unloaded a shared object, for
- example. */
-void
-remove_target_sections (bfd *abfd)
-{
- struct target_ops **t;
-
- for (t = target_structs; t < target_structs + target_struct_size; t++)
- {
- struct target_section *src, *dest;
-
- dest = (*t)->to_sections;
- for (src = (*t)->to_sections; src < (*t)->to_sections_end; src++)
- if (src->bfd != abfd)
- {
- /* Keep this section. */
- if (dest < src) *dest = *src;
- dest++;
- }
-
- /* If we've dropped any sections, resize the section table. */
- if (dest < src)
- target_resize_to_sections (*t, dest - src);
- }
-}
-
-
-
-
/* Find a single runnable target in the stack and return it. If for
some reason there is more than one, return NULL. */
diff --git a/gdb/target.h b/gdb/target.h
index f3bddfc..e4cb35d 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -30,6 +30,7 @@ struct mem_attrib;
struct target_ops;
struct bp_target_info;
struct regcache;
+struct target_section_table;
/* This include file defines the interface between the main part
of the debugger, and the part which is target-specific, or
@@ -412,6 +413,7 @@ struct target_ops
void (*to_rcmd) (char *command, struct ui_file *output);
char *(*to_pid_to_exec_file) (int pid);
void (*to_log_command) (const char *);
+ struct target_section_table *(*to_get_section_table) (struct target_ops *);
enum strata to_stratum;
int to_has_all_memory;
int to_has_memory;
@@ -420,10 +422,6 @@ struct target_ops
int to_has_execution;
int to_has_thread_control; /* control thread execution */
int to_attach_no_wait;
- struct target_section
- *to_sections;
- struct target_section
- *to_sections_end;
/* ASYNC target controls */
int (*to_can_async_p) (void);
int (*to_is_async_p) (void);
@@ -668,9 +666,6 @@ extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
int len);
-extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int,
- struct mem_attrib *, struct target_ops *);
-
/* Fetches the target's memory map. If one is found it is sorted
and returned, after some consistency checking. Otherwise, NULL
is returned. */
@@ -733,10 +728,6 @@ extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid);
extern int inferior_has_execd (ptid_t pid, char **execd_pathname);
-/* From exec.c */
-
-extern void print_section_info (struct target_ops *, bfd *);
-
/* Print a line about the current target. */
#define target_files_info() \
@@ -1208,10 +1199,24 @@ struct target_section
bfd *bfd; /* BFD file pointer */
};
+/* Holds an array of target sections. Defined by [SECTIONS..SECTIONS_END[. */
+
+struct target_section_table
+{
+ struct target_section *sections;
+ struct target_section *sections_end;
+};
+
/* Return the "section" containing the specified address. */
struct target_section *target_section_by_addr (struct target_ops *target,
CORE_ADDR addr);
+/* Return the target section table this target (or the targets
+ beneath) currently manipulate. */
+
+extern struct target_section_table *target_get_section_table
+ (struct target_ops *target);
+
/* From mem-break.c */
extern int memory_remove_breakpoint (struct bp_target_info *);
@@ -1242,11 +1247,6 @@ extern struct target_ops *find_core_target (void);
extern struct target_ops *find_target_beneath (struct target_ops *);
-extern int target_resize_to_sections (struct target_ops *target,
- int num_added);
-
-extern void remove_target_sections (bfd *abfd);
-
/* Read OS data object of type TYPE from the target, and return it in
XML format. The result is NUL-terminated and returned as a string,
allocated using xmalloc. If an error occurs or the transfer is