+2006-02-28 Alexandre Oliva <aoliva@redhat.com>
+
+ * solib-svr4.h (struct link_map_offsets): Add l_ld_offset and
+ l_ld_size fields.
+ * solib-svr4.c (struct lm_info): Add l_addr field.
+ (LM_ADDR_FROM_LINK_MAP): Renamed from LM_ADDR.
+ (HAS_LM_DYNAMIC_FROM_LINK_MAP): New.
+ (LM_DYNAMIC_FROM_LINK_MAP): New.
+ (LM_ADDR_CHECK): New. Use it instead of LM_ADDR.
+ (svr4_current_sos): Initialize l_addr. Adjust.
+ (svr4_relocate_section_addresses): Adjust.
+ (svr4_ilp32_fetch_link_map_offsets): Define new members.
+ (svr4_lp64_fetch_link_map_offsets): Likewise.
+ * solib-legacy.c (legacy_svr4_fetch_link_map_offsets): Likewise.
+ * mipsnbsd-tdep.c (mipsnbsd_ilp32_fetch_link_map_offsets): Likewise.
+ (mipsnbsd_lp64_fetch_link_map_offsets): Likewise.
+ * Makefile.in (solib-svr4.o): Depend on $(elf_bfd_h).
+
2006-02-26 David S. Miller <davem@sunset.davemloft.net>
* config/sparc/linux.mt (TDEPFILES): Add sol2-tdep.o.
solib-svr4.o: solib-svr4.c $(defs_h) $(elf_external_h) $(elf_common_h) \
$(elf_mips_h) $(symtab_h) $(bfd_h) $(symfile_h) $(objfiles_h) \
$(gdbcore_h) $(target_h) $(inferior_h) $(gdb_assert_h) \
- $(solist_h) $(solib_h) $(solib_svr4_h) $(bfd_target_h) $(exec_h)
+ $(solist_h) $(solib_h) $(solib_svr4_h) $(bfd_target_h) $(elf_bfd_h) \
+ $(exec_h)
sol-thread.o: sol-thread.c $(defs_h) $(gdbthread_h) $(target_h) \
$(inferior_h) $(gdb_stat_h) $(gdbcmd_h) $(gdbcore_h) $(regcache_h) \
$(solib_h) $(symfile_h) $(gdb_string_h) $(gregset_h)
lmo.l_addr_size = 4;
lmo.l_name_offset = 8;
lmo.l_name_size = 4;
+ lmo.l_ld_offset = 12;
+ lmo.l_ld_size = 4;
lmo.l_next_offset = 16;
lmo.l_next_size = 4;
lmo.l_prev_offset = 20;
lmo.l_addr_size = 8;
lmo.l_name_offset = 16;
lmo.l_name_size = 8;
+ lmo.l_ld_offset = 24;
+ lmo.l_ld_size = 8;
lmo.l_next_offset = 32;
lmo.l_next_size = 8;
lmo.l_prev_offset = 40;
lmo.l_next_offset = offsetof (struct link_map, l_next);
lmo.l_next_size = fieldsize (struct link_map, l_next);
+ lmo.l_ld_offset = offsetof (struct link_map, l_ld);
+ lmo.l_ld_size = fieldsize (struct link_map, l_ld);
+
lmo.l_prev_offset = offsetof (struct link_map, l_prev);
lmo.l_prev_size = fieldsize (struct link_map, l_prev);
lmo.l_next_offset = offsetof (struct link_map, lm_next);
lmo.l_next_size = fieldsize (struct link_map, lm_next);
+ /* FIXME: Is this the right field name, or is it available at all? */
+ lmo.l_ld_offset = offsetof (struct link_map, lm_ld);
+ lmo.l_ld_size = fieldsize (struct link_map, lm_ld);
+
lmo.l_name_offset = offsetof (struct link_map, lm_name);
lmo.l_name_size = fieldsize (struct link_map, lm_name);
#else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS) */
lmo.l_name_offset = offsetof (struct so_map, som_path);
lmo.l_name_size = fieldsize (struct so_map, som_path);
+
+ /* FIXME: Is the address of the dynamic table available? */
+ lmo.l_ld_offset = 0;
+ lmo.l_ld_size = 0;
#endif /* HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS */
#endif /* HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS */
#endif /* HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS */
#include "solib-svr4.h"
#include "bfd-target.h"
+#include "elf-bfd.h"
#include "exec.h"
static struct link_map_offsets *svr4_fetch_link_map_offsets (void);
rather than void *, so that we may use byte offsets to find the
various fields without the need for a cast. */
gdb_byte *lm;
+
+ /* Amount by which addresses in the binary should be relocated to
+ match the inferior. This could most often be taken directly
+ from lm, but when prelinking is involved and the prelink base
+ address changes, we may need a different offset, we want to
+ warn about the difference and compute it only once. */
+ CORE_ADDR l_addr;
};
/* On SVR4 systems, a list of symbols in the dynamic linker where
/* link map access functions */
static CORE_ADDR
-LM_ADDR (struct so_list *so)
+LM_ADDR_FROM_LINK_MAP (struct so_list *so)
{
struct link_map_offsets *lmo = svr4_fetch_link_map_offsets ();
- return (CORE_ADDR) extract_signed_integer (so->lm_info->lm + lmo->l_addr_offset,
+ return (CORE_ADDR) extract_signed_integer (so->lm_info->lm
+ + lmo->l_addr_offset,
lmo->l_addr_size);
}
+static int
+HAS_LM_DYNAMIC_FROM_LINK_MAP ()
+{
+ struct link_map_offsets *lmo = svr4_fetch_link_map_offsets ();
+
+ return (lmo->l_ld_size != 0);
+}
+
+static CORE_ADDR
+LM_DYNAMIC_FROM_LINK_MAP (struct so_list *so)
+{
+ struct link_map_offsets *lmo = svr4_fetch_link_map_offsets ();
+
+ gdb_assert (lmo->l_ld_size != 0);
+
+ return (CORE_ADDR) extract_signed_integer (so->lm_info->lm
+ + lmo->l_ld_offset,
+ lmo->l_ld_size);
+}
+
+static CORE_ADDR
+LM_ADDR_CHECK (struct so_list *so, bfd *abfd)
+{
+ if (so->lm_info->l_addr == (CORE_ADDR)-1)
+ {
+ struct bfd_section *dyninfo_sect;
+ CORE_ADDR l_addr, l_dynaddr, dynaddr, align = 0x1000;
+
+ l_addr = LM_ADDR_FROM_LINK_MAP (so);
+
+ if (! abfd || ! HAS_LM_DYNAMIC_FROM_LINK_MAP ())
+ goto set_addr;
+
+ l_dynaddr = LM_DYNAMIC_FROM_LINK_MAP (so);
+
+ dyninfo_sect = bfd_get_section_by_name (abfd, ".dynamic");
+ if (dyninfo_sect == NULL)
+ goto set_addr;
+
+ dynaddr = bfd_section_vma (abfd, dyninfo_sect);
+
+ if (dynaddr + l_addr != l_dynaddr)
+ {
+ warning (_(".dynamic section for \"%s\" "
+ "is not at the expected address"), so->so_name);
+
+ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
+ {
+ Elf_Internal_Ehdr *ehdr = elf_tdata (abfd)->elf_header;
+ Elf_Internal_Phdr *phdr = elf_tdata (abfd)->phdr;
+ int i;
+
+ align = 1;
+
+ for (i = 0; i < ehdr->e_phnum; i++)
+ if (phdr[i].p_type == PT_LOAD && phdr[i].p_align > align)
+ align = phdr[i].p_align;
+ }
+
+ /* Turn it into a mask. */
+ align--;
+
+ /* If the changes match the alignment requirements, we
+ assume we're using a core file that was generated by the
+ same binary, just prelinked with a different base offset.
+ If it doesn't match, we may have a different binary, the
+ same binary with the dynamic table loaded at an unrelated
+ location, or anything, really. To avoid regressions,
+ don't adjust the base offset in the latter case, although
+ odds are that, if things really changed, debugging won't
+ quite work. */
+ if ((l_addr & align) == 0 && ((dynaddr - l_dynaddr) & align) == 0)
+ {
+ l_addr = l_dynaddr - dynaddr;
+ warning (_("difference appears to be caused by prelink, "
+ "adjusting expectations"));
+ }
+ }
+
+ set_addr:
+ so->lm_info->l_addr = l_addr;
+ }
+
+ return so->lm_info->l_addr;
+}
+
static CORE_ADDR
LM_NEXT (struct so_list *so)
{
free_so (new);
else
{
+ new->lm_info->l_addr = (CORE_ADDR)-1;
+
new->next = 0;
*link_ptr = new;
link_ptr = &new->next;
if (strcmp (buf, so->so_original_name) == 0)
{
load_addr_found = 1;
- load_addr = LM_ADDR (so);
+ load_addr = LM_ADDR_CHECK (so, tmp_bfd);
break;
}
so = so->next;
svr4_relocate_section_addresses (struct so_list *so,
struct section_table *sec)
{
- sec->addr = svr4_truncate_ptr (sec->addr + LM_ADDR (so));
- sec->endaddr = svr4_truncate_ptr (sec->endaddr + LM_ADDR (so));
+ sec->addr = svr4_truncate_ptr (sec->addr + LM_ADDR_CHECK (so,
+ sec->bfd));
+ sec->endaddr = svr4_truncate_ptr (sec->endaddr + LM_ADDR_CHECK (so,
+ sec->bfd));
}
\f
lmo.l_addr_size = 4;
lmo.l_name_offset = 4;
lmo.l_name_size = 4;
+ lmo.l_ld_offset = 8;
+ lmo.l_ld_size = 4;
lmo.l_next_offset = 12;
lmo.l_next_size = 4;
lmo.l_prev_offset = 16;
lmo.l_addr_size = 8;
lmo.l_name_offset = 8;
lmo.l_name_size = 8;
+ lmo.l_ld_offset = 16;
+ lmo.l_ld_size = 8;
lmo.l_next_offset = 24;
lmo.l_next_size = 8;
lmo.l_prev_offset = 32;
/* Size of l_addr field in struct link_map. */
int l_addr_size;
+ /* Offset to l_ld field in struct link_map. */
+ int l_ld_offset;
+
+ /* Size of l_ld field in struct link_map. */
+ int l_ld_size;
+
/* Offset to l_next field in struct link_map. */
int l_next_offset;
+2006-02-28 Alexandre Oliva <aoliva@redhat.com>
+
+ * gdb.base/prelink.exp: New test.
+ * gdb.base/prelink.c, gdb.base/prelink-lib.c: New sources.
+
2006-02-24 Wu Zhou <woodzltc@cn.ibm.com>
* gdb.fortran/derived-type.f90: New file.
--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2006 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+int
+g (void (*p)(void))
+{
+ p ();
+}
+
+void
+f(void (*p)(void)) {
+ g (p);
+}
+
+void (*h (void)) (void (*p)(void))
+{
+ return f;
+}
--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2006 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include <stdio.h>
+
+extern void (*h (void)) (void (*)(void));
+
+int
+main (void)
+{
+ void (*f) (void (*)(void)) = h ();
+ printf ("%p\n", f);
+ f (0);
+}
--- /dev/null
+# Copyright 2006 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+# Please email any bugs, comments, and/or additions to this file to:
+# bug-gdb@prep.ai.mit.edu
+
+# This file was written by Alexandre Oliva <aoliva@redhat.com>
+
+if $tracelevel then {
+ strace $tracelevel
+ }
+
+set prms_id 0
+set bug_id 0
+
+# are we on a target board
+if ![isnative] then {
+ return
+}
+
+if [get_compiler_info "ignored"] {
+ return -1
+}
+
+if {$gcc_compiled == 0} {
+ return -1
+}
+
+set testfile "prelink"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+set libsrcfile ${testfile}-lib.c
+set libfile ${objdir}/${subdir}/${testfile}.so
+if { [gdb_compile "${srcdir}/${subdir}/${libsrcfile}" "${libfile}" executable [list debug "additional_flags=-fpic -shared -nodefaultlibs"]] != ""} {
+ # If creating the shared library fails, maybe we don't have the right tools
+ return -1
+}
+
+if {[catch "system \"prelink -NR ${libfile}\""] != 0} {
+ # Maybe we don't have prelink.
+ return -1
+}
+
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile} ${libfile}" "${binfile}" executable [list debug "additional_flags=-Wl,-rpath,${objdir}/${subdir}"]] != ""} {
+ return -1;
+}
+
+set found 0
+set coredir "${objdir}/${subdir}/coredir.[getpid]"
+file mkdir $coredir
+catch "system \"(cd ${coredir}; ulimit -c unlimited; ${binfile}; true) >/dev/null 2>&1\""
+
+foreach i "${coredir}/core ${coredir}/core.coremaker.c ${binfile}.core" {
+ if [remote_file build exists $i] {
+ remote_exec build "mv $i ${objdir}/${subdir}/prelink.core"
+ set found 1
+ }
+}
+# Check for "core.PID".
+if { $found == 0 } {
+ set names [glob -nocomplain -directory $coredir core.*]
+ if {[llength $names] == 1} {
+ set corefile [file join $coredir [lindex $names 0]]
+ remote_exec build "mv $corefile ${objdir}/${subdir}/prelink.core"
+ set found 1
+ }
+}
+
+catch "system \"prelink -u ${libfile}\""
+catch "system \"prelink -NR ${libfile}\""
+
+# Try to clean up after ourselves.
+remote_file build delete [file join $coredir coremmap.data]
+remote_exec build "rmdir $coredir"
+
+if { $found == 0 } {
+ warning "can't generate a core file - prelink tests suppressed - check ulimit -c"
+ return 0
+}
+
+# Start with a fresh gdb
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+set oldtimeout $timeout
+set timeout [expr "$timeout + 60"]
+verbose "Timeout is now $timeout seconds" 2
+send_gdb "core-file $objdir/$subdir/prelink.core\n"
+gdb_expect {
+ -re "warning: \.dynamic section.*not at the expected address" {
+ pass "changed base address"
+ }
+ -re ".*$gdb_prompt $" { fail "changed base address" }
+ timeout { fail "(timeout) changed base address" }
+}
+gdb_expect {
+ -re "warning: difference.*caused by prelink, adjusting" {
+ pass "prelink adjustment"
+ }
+ -re ".*$gdb_prompt $" { fail "prelink adjustment" }
+ timeout { fail "(timeout) prelink adjustment" }
+}
+set timeout $oldtimeout
+verbose "Timeout is now $timeout seconds" 2
+
+gdb_exit
+
+return 0
+
projects / deliverable / binutils-gdb.git / commitdiff
