/* Shared library support for IRIX.
- Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004
- Free Software Foundation, Inc.
+ Copyright (C) 1993-2013 Free Software Foundation, Inc.
This file was created using portions of irix5-nat.c originally
contributed to GDB by Ian Lance Taylor.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "target.h"
#include "inferior.h"
+#include "gdbthread.h"
#include "solist.h"
+#include "solib.h"
+#include "solib-irix.h"
+
/* Link map info to include in an allocate so_list entry. Unlike some
of the other solib backends, this (Irix) backend chooses to decode
typedef struct
{
- char b[4];
+ gdb_byte b[4];
}
gdb_int32_bytes;
typedef struct
{
- char b[8];
+ gdb_byte b[8];
}
gdb_int64_bytes;
appropriate type. Calling extract_signed_integer seems simpler. */
static CORE_ADDR
-extract_mips_address (void *addr, int len)
+extract_mips_address (void *addr, int len, enum bfd_endian byte_order)
{
- return extract_signed_integer (addr, len);
+ return extract_signed_integer (addr, len, byte_order);
}
/* Fetch and return the link map data associated with ADDR. Note that
this routine automatically determines which (of three) link map
formats is in use by the target. */
-struct lm_info
+static struct lm_info
fetch_lm_info (CORE_ADDR addr)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
struct lm_info li;
union irix_obj_info buf;
being at the end of a page or the like.) */
read_memory (addr, (char *) &buf, sizeof (buf.ol32));
- if (extract_unsigned_integer (&buf.magic, sizeof (buf.magic)) != 0xffffffff)
+ if (extract_unsigned_integer (buf.magic.b, sizeof (buf.magic), byte_order)
+ != 0xffffffff)
{
- /* Use buf.ol32... */
+ /* Use buf.ol32... */
char obj_buf[432];
CORE_ADDR obj_addr = extract_mips_address (&buf.ol32.data,
- sizeof (buf.ol32.data));
- li.next = extract_mips_address (&buf.ol32.next, sizeof (buf.ol32.next));
+ sizeof (buf.ol32.data),
+ byte_order);
+
+ li.next = extract_mips_address (&buf.ol32.next,
+ sizeof (buf.ol32.next), byte_order);
read_memory (obj_addr, obj_buf, sizeof (obj_buf));
- li.pathname_addr = extract_mips_address (&obj_buf[236], 4);
+ li.pathname_addr = extract_mips_address (&obj_buf[236], 4, byte_order);
li.pathname_len = 0; /* unknown */
- li.reloc_offset = extract_mips_address (&obj_buf[196], 4)
- - extract_mips_address (&obj_buf[248], 4);
+ li.reloc_offset = extract_mips_address (&obj_buf[196], 4, byte_order)
+ - extract_mips_address (&obj_buf[248], 4, byte_order);
}
- else if (extract_unsigned_integer (&buf.oi32.oi_size,
- sizeof (buf.oi32.oi_size))
+ else if (extract_unsigned_integer (buf.oi32.oi_size.b,
+ sizeof (buf.oi32.oi_size), byte_order)
== sizeof (buf.oi32))
{
/* Use buf.oi32... */
/* Fill in fields using buffer contents. */
li.next = extract_mips_address (&buf.oi32.oi_next,
- sizeof (buf.oi32.oi_next));
+ sizeof (buf.oi32.oi_next), byte_order);
li.reloc_offset = extract_mips_address (&buf.oi32.oi_ehdr,
- sizeof (buf.oi32.oi_ehdr))
+ sizeof (buf.oi32.oi_ehdr),
+ byte_order)
- extract_mips_address (&buf.oi32.oi_orig_ehdr,
- sizeof (buf.oi32.oi_orig_ehdr));
+ sizeof (buf.oi32.oi_orig_ehdr), byte_order);
li.pathname_addr = extract_mips_address (&buf.oi32.oi_pathname,
- sizeof (buf.oi32.oi_pathname));
- li.pathname_len = extract_unsigned_integer (&buf.oi32.oi_pathname_len,
+ sizeof (buf.oi32.oi_pathname),
+ byte_order);
+ li.pathname_len = extract_unsigned_integer (buf.oi32.oi_pathname_len.b,
sizeof (buf.oi32.
- oi_pathname_len));
+ oi_pathname_len),
+ byte_order);
}
- else if (extract_unsigned_integer (&buf.oi64.oi_size,
- sizeof (buf.oi64.oi_size))
+ else if (extract_unsigned_integer (buf.oi64.oi_size.b,
+ sizeof (buf.oi64.oi_size), byte_order)
== sizeof (buf.oi64))
{
/* Use buf.oi64... */
/* Fill in fields using buffer contents. */
li.next = extract_mips_address (&buf.oi64.oi_next,
- sizeof (buf.oi64.oi_next));
+ sizeof (buf.oi64.oi_next), byte_order);
li.reloc_offset = extract_mips_address (&buf.oi64.oi_ehdr,
- sizeof (buf.oi64.oi_ehdr))
+ sizeof (buf.oi64.oi_ehdr),
+ byte_order)
- extract_mips_address (&buf.oi64.oi_orig_ehdr,
- sizeof (buf.oi64.oi_orig_ehdr));
+ sizeof (buf.oi64.oi_orig_ehdr), byte_order);
li.pathname_addr = extract_mips_address (&buf.oi64.oi_pathname,
- sizeof (buf.oi64.oi_pathname));
- li.pathname_len = extract_unsigned_integer (&buf.oi64.oi_pathname_len,
+ sizeof (buf.oi64.oi_pathname),
+ byte_order);
+ li.pathname_len = extract_unsigned_integer (buf.oi64.oi_pathname_len.b,
sizeof (buf.oi64.
- oi_pathname_len));
+ oi_pathname_len),
+ byte_order);
}
else
{
/* The symbol which starts off the list of shared libraries. */
#define DEBUG_BASE "__rld_obj_head"
-char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
-
-static CORE_ADDR debug_base; /* Base of dynamic linker structures */
-static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */
-
-/*
-
- LOCAL FUNCTION
-
- locate_base -- locate the base address of dynamic linker structs
-
- SYNOPSIS
+static void *base_breakpoint;
- CORE_ADDR locate_base (void)
+static CORE_ADDR debug_base; /* Base of dynamic linker structures. */
- DESCRIPTION
+/* Locate the base address of dynamic linker structs.
For both the SunOS and SVR4 shared library implementations, if the
inferior executable has been linked dynamically, there is a single
we need to find this address. We may be stopped on the first instruc-
tion 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).
-
- */
+ to the process for example). */
static CORE_ADDR
locate_base (void)
return (address);
}
-/*
-
- LOCAL FUNCTION
-
- disable_break -- remove the "mapping changed" breakpoint
-
- SYNOPSIS
-
- static int disable_break ()
-
- DESCRIPTION
+/* Remove the "mapping changed" breakpoint.
Removes the breakpoint that gets hit when the dynamic linker
- completes a mapping change.
-
- */
+ completes a mapping change. */
static int
disable_break (void)
{
int status = 1;
-
/* Note that breakpoint address and original contents are in our address
- space, so we just need to write the original contents back. */
+ space, so we just need to write the original contents back. */
- if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0)
+ if (deprecated_remove_raw_breakpoint (target_gdbarch (), base_breakpoint) != 0)
{
status = 0;
}
+ base_breakpoint = NULL;
+
/* Note that it is possible that we have stopped at a location that
is different from the location where we inserted our breakpoint.
On mips-irix, we can actually land in __dbx_init(), so we should
return (status);
}
-/*
-
- LOCAL FUNCTION
-
- enable_break -- arrange for dynamic linker to hit breakpoint
-
- SYNOPSIS
-
- int enable_break (void)
-
- DESCRIPTION
+/* Arrange for dynamic linker to hit breakpoint.
This functions inserts a breakpoint at the entry point of the
- main executable, where all shared libraries are mapped in.
- */
+ main executable, where all shared libraries are mapped in. */
static int
enable_break (void)
{
- if (symfile_objfile != NULL
- && target_insert_breakpoint (entry_point_address (),
- shadow_contents) == 0)
+ if (symfile_objfile != NULL && has_stack_frames ())
{
- breakpoint_addr = entry_point_address ();
- return 1;
- }
+ struct frame_info *frame = get_current_frame ();
+ struct address_space *aspace = get_frame_address_space (frame);
+ CORE_ADDR entry_point;
- return 0;
-}
-
-/*
-
- LOCAL FUNCTION
-
- irix_solib_create_inferior_hook -- shared library startup support
+ if (!entry_point_address_query (&entry_point))
+ return 0;
- SYNOPSIS
+ base_breakpoint = deprecated_insert_raw_breakpoint (target_gdbarch (),
+ aspace, entry_point);
- void solib_create_inferior_hook ()
+ if (base_breakpoint != NULL)
+ return 1;
+ }
- DESCRIPTION
+ return 0;
+}
- 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.
+/* Implement the "create_inferior_hook" target_solib_ops method.
For SunOS executables, this first instruction is typically the
one at "_start", or a similar text label, regardless of whether
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.
- */
+ Also, what if child has exit()ed? Must exit loop somehow. */
static void
-irix_solib_create_inferior_hook (void)
+irix_solib_create_inferior_hook (int from_tty)
{
+ struct inferior *inf;
+ struct thread_info *tp;
+
+ inf = current_inferior ();
+
+ /* If we are attaching to the inferior, the shared libraries
+ have already been mapped, so nothing more to do. */
+ if (inf->attach_flag)
+ return;
+
+ /* Likewise when debugging from a core file, the shared libraries
+ have already been mapped, so nothing more to do. */
+ if (!target_can_run (¤t_target))
+ return;
+
if (!enable_break ())
{
warning (_("shared library handler failed to enable breakpoint"));
/* Now run the target. It will eventually hit the breakpoint, at
which point all of the libraries will have been mapped in and we
can go groveling around in the dynamic linker structures to find
- out what we need to know about them. */
+ out what we need to know about them. */
+
+ tp = inferior_thread ();
clear_proceed_status ();
- stop_soon = STOP_QUIETLY;
- stop_signal = TARGET_SIGNAL_0;
+
+ inf->control.stop_soon = STOP_QUIETLY;
+ tp->suspend.stop_signal = GDB_SIGNAL_0;
+
do
{
- target_resume (pid_to_ptid (-1), 0, stop_signal);
+ target_resume (pid_to_ptid (-1), 0, tp->suspend.stop_signal);
wait_for_inferior ();
}
- while (stop_signal != TARGET_SIGNAL_TRAP);
+ while (tp->suspend.stop_signal != GDB_SIGNAL_TRAP);
/* We are now either at the "mapping complete" breakpoint (or somewhere
else, a condition we aren't prepared to deal with anyway), so adjust
the PC as necessary after a breakpoint, disable the breakpoint, and
- add any shared libraries that were mapped in. */
+ add any shared libraries that were mapped in. */
if (!disable_break ())
{
Delaying the resetting of stop_soon until after symbol loading
suppresses the warning. */
solib_add ((char *) 0, 0, (struct target_ops *) 0, auto_solib_add);
- stop_soon = NO_STOP_QUIETLY;
- re_enable_breakpoints_in_shlibs ();
+ inf->control.stop_soon = NO_STOP_QUIETLY;
}
-/* LOCAL FUNCTION
-
- current_sos -- build a list of currently loaded shared objects
-
- SYNOPSIS
-
- struct so_list *current_sos ()
-
- DESCRIPTION
-
- Build a list of `struct so_list' objects describing the shared
- objects currently loaded in the inferior. This list does not
- include an entry for the main executable file.
-
- Note that we only gather information directly available from the
- inferior --- we don't examine any of the shared library files
- themselves. The declaration of `struct so_list' says which fields
- we provide values for. */
+/* Implement the "current_sos" target_so_ops method. */
static struct so_list *
irix_current_sos (void)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
+ int addr_size = gdbarch_addr_bit (target_gdbarch ()) / TARGET_CHAR_BIT;
CORE_ADDR lma;
char addr_buf[8];
struct so_list *head = 0;
return 0;
}
- read_memory (debug_base, addr_buf, TARGET_ADDR_BIT / TARGET_CHAR_BIT);
- lma = extract_mips_address (addr_buf, TARGET_ADDR_BIT / TARGET_CHAR_BIT);
+ read_memory (debug_base, addr_buf, addr_size);
+ lma = extract_mips_address (addr_buf, addr_size, byte_order);
while (lma)
{
if (name_size >= SO_NAME_MAX_PATH_SIZE)
{
name_size = SO_NAME_MAX_PATH_SIZE - 1;
- warning
- ("current_sos: truncating name of %d characters to only %d characters",
- lm.pathname_len, name_size);
+ warning (_("current_sos: truncating name of "
+ "%d characters to only %d characters"),
+ lm.pathname_len, name_size);
}
target_read_string (lm.pathname_addr, &name_buf,
return head;
}
-/*
-
- LOCAL FUNCTION
-
- irix_open_symbol_file_object
+/* Implement the "open_symbol_file_object" target_so_ops method.
- SYNOPSIS
-
- void irix_open_symbol_file_object (void *from_tty)
-
- DESCRIPTION
-
- If no open symbol file, attempt to locate and open the main symbol
- file. On IRIX, this is the first link map entry. If its name is
- here, we can open it. Useful when attaching to a process without
- first loading its symbol file.
-
- If FROM_TTYP dereferences to a non-zero integer, allow messages to
- be printed. This parameter is a pointer rather than an int because
- open_symbol_file_object() is called via catch_errors() and
- catch_errors() requires a pointer argument. */
+ If no open symbol file, attempt to locate and open the main symbol
+ file. On IRIX, this is the first link map entry. If its name is
+ here, we can open it. Useful when attaching to a process without
+ first loading its symbol file. */
static int
irix_open_symbol_file_object (void *from_ttyp)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
+ int addr_size = gdbarch_addr_bit (target_gdbarch ()) / TARGET_CHAR_BIT;
CORE_ADDR lma;
char addr_buf[8];
struct lm_info lm;
char *filename;
if (symfile_objfile)
- if (!query ("Attempt to reload symbols from process? "))
+ if (!query (_("Attempt to reload symbols from process? ")))
return 0;
if ((debug_base = locate_base ()) == 0)
return 0; /* failed somehow... */
/* First link map member should be the executable. */
- read_memory (debug_base, addr_buf, TARGET_ADDR_BIT / TARGET_CHAR_BIT);
- lma = extract_mips_address (addr_buf, TARGET_ADDR_BIT / TARGET_CHAR_BIT);
+ read_memory (debug_base, addr_buf, addr_size);
+ lma = extract_mips_address (addr_buf, addr_size, byte_order);
if (lma == 0)
return 0; /* failed somehow... */
return 1;
}
+/* Implement the "special_symbol_handling" target_so_ops method.
-/*
-
- LOCAL FUNCTION
-
- irix_special_symbol_handling -- additional shared library symbol handling
-
- SYNOPSIS
-
- void irix_special_symbol_handling ()
-
- 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.
-
- For SunOS4, this consisted 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.
-
- However, for IRIX, there's nothing to do.
-
- */
+ For IRIX, there's nothing to do. */
static void
irix_special_symbol_handling (void)
static void
irix_relocate_section_addresses (struct so_list *so,
- struct section_table *sec)
+ struct target_section *sec)
{
sec->addr += so->lm_info->reloc_offset;
sec->endaddr += so->lm_info->reloc_offset;
return 0;
}
-static struct target_so_ops irix_so_ops;
+struct target_so_ops irix_so_ops;
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_irix_solib;
void
_initialize_irix_solib (void)
irix_so_ops.current_sos = irix_current_sos;
irix_so_ops.open_symbol_file_object = irix_open_symbol_file_object;
irix_so_ops.in_dynsym_resolve_code = irix_in_dynsym_resolve_code;
-
- /* FIXME: Don't do this here. *_gdbarch_init() should set so_ops. */
- current_target_so_ops = &irix_so_ops;
+ irix_so_ops.bfd_open = solib_bfd_open;
}
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