+2003-11-09 Mark Kettenis <kettenis@gnu.org>
+ David S. Miller <davem@redhat.com>
+
+ * glibc-tdep.c, glibc-tdep.h: New files.
+ * config/arm/linux.mt (TDEPFILES): Add glibc-tdep.o
+ * config/i386/linux.mt (TDEPFILES): Likewise.
+ * i386-linux-tdep.c (glibc-tdep.h): Include.
+ (find_minsym_and_objfile, skip_hurd_resolver): Delete.
+ (i386_linux_skip_solib_resolver): Call glibc_skip_solib_resolver.
+ * arm-linux-tdep.c (glibc-tdep.h): Include.
+ (find_minsym_and_objfile, skip_hurd_resolver): Delete.
+ (arm_linux_skip_solib_resolver): Call glibc_skip_solib_resolver.
+ * Makefile.in (ALLDEPFILES): Add glibc-tdep.c
+ (glibc_tdep_h): Define.
+ (glibc-tdep.o): Add dependencies.
+ (arm-linux-tdep.o): Update dependencies.
+ (i386-linux-tdep.o): Likewise.
+
2003-11-09 Andrew Cagney <cagney@redhat.com>
* config/mips/irix6.mh (NAT_FILE): Set to "nm-irix5.h".
gdbtypes_h = gdbtypes.h
gdb_vfork_h = gdb_vfork.h
gdb_wait_h = gdb_wait.h
+glibc_tdep_h = glibc-tdep.h
gnu_nat_h = gnu-nat.h
gregset_h = gregset.h
hppa_tdep_h = hppa-tdep.h
coff-solib.c \
core-sol2.c core-regset.c core-aout.c corelow.c \
dcache.c delta68-nat.c dpx2-nat.c exec.c fork-child.c \
+ glibc-tdep.c \
go32-nat.c h8300-tdep.c \
hppa-tdep.c hppa-hpux-tdep.c \
hppab-nat.c hppah-nat.c hpread.c \
$(gdbcmd_h) $(inferior_h) $(gdb_string_h) $(regcache_h) \
$(gdb_assert_h) $(sim_regno_h) $(version_h) $(floatformat_h)
arm-linux-nat.o: arm-linux-nat.c $(defs_h) $(inferior_h) $(gdbcore_h) \
- $(gdb_string_h) $(regcache_h) $(arm_tdep_h) $(gregset_h)
+ $(gdb_string_h) $(regcache_h) $(arm_tdep_h) $(glibc_tdep_h) $(gregset_h)
arm-linux-tdep.o: arm-linux-tdep.c $(defs_h) $(target_h) $(value_h) \
$(gdbtypes_h) $(floatformat_h) $(gdbcore_h) $(frame_h) $(regcache_h) \
$(doublest_h) $(solib_svr4_h) $(osabi_h) $(arm_tdep_h) $(symtab_h) \
i386-linux-tdep.o: i386-linux-tdep.c $(defs_h) $(gdbcore_h) $(frame_h) \
$(value_h) $(regcache_h) $(inferior_h) $(reggroups_h) $(symtab_h) \
$(symfile_h) $(objfiles_h) $(solib_svr4_h) $(osabi_h) $(i386_tdep_h) \
- $(i386_linux_tdep_h)
+ $(i386_linux_tdep_h) $(glibc_tdep_h)
i386ly-tdep.o: i386ly-tdep.c $(defs_h) $(gdbcore_h) $(inferior_h) \
$(regcache_h) $(target_h) $(osabi_h) $(i386_tdep_h)
i386-nat.o: i386-nat.c $(defs_h) $(breakpoint_h) $(command_h) $(gdbcmd_h)
$(filenames_h) $(inferior_h) $(mmalloc_h)
uw-thread.o: uw-thread.c $(defs_h) $(gdbthread_h) $(target_h) $(inferior_h) \
$(regcache_h) $(gregset_h)
+glibc-tdep.o: glibc-tdep.c $(defs_h) $(frame_h) $(symtab_h) \
+ $(symfile_h) $(objfiles_h) $(glibc_tdep_h)
v850ice.o: v850ice.c $(defs_h) $(gdb_string_h) $(frame_h) $(symtab_h) \
$(inferior_h) $(breakpoint_h) $(symfile_h) $(target_h) $(objfiles_h) \
$(gdbcore_h) $(value_h) $(command_h) $(regcache_h)
# Target: ARM based machine running GNU/Linux
TM_FILE= tm-linux.h
-TDEPFILES= arm-tdep.o arm-linux-tdep.o solib.o solib-svr4.o solib-legacy.o
+TDEPFILES= arm-tdep.o arm-linux-tdep.o glibc-tdep.o solib.o solib-svr4.o solib-legacy.o
# Target: Intel 386 running GNU/Linux
-TDEPFILES= i386-tdep.o i386-linux-tdep.o i387-tdep.o \
+TDEPFILES= i386-tdep.o i386-linux-tdep.o glibc-tdep.o i387-tdep.o \
solib.o solib-svr4.o solib-legacy.o
TM_FILE= tm-linux.h
--- /dev/null
+/* Target-dependent code for the GNU C Library (glibc).
+
+ Copyright 2002, 2003 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 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"
+#include "frame.h"
+#include "symtab.h"
+#include "symfile.h"
+#include "objfiles.h"
+
+#include "glibc-tdep.h"
+
+/* Calling functions in shared libraries. */
+
+/* Find the minimal symbol named NAME, and return both the minsym
+ struct and its objfile. This probably ought to be in minsym.c, but
+ everything there is trying to deal with things like C++ and
+ SOFUN_ADDRESS_MAYBE_TURQUOISE, ... Since this is so simple, it may
+ be considered too special-purpose for general consumption. */
+
+static struct minimal_symbol *
+find_minsym_and_objfile (char *name, struct objfile **objfile_p)
+{
+ struct objfile *objfile;
+
+ ALL_OBJFILES (objfile)
+ {
+ struct minimal_symbol *msym;
+
+ ALL_OBJFILE_MSYMBOLS (objfile, msym)
+ {
+ if (SYMBOL_LINKAGE_NAME (msym)
+ && strcmp (SYMBOL_LINKAGE_NAME (msym), name) == 0)
+ {
+ *objfile_p = objfile;
+ return msym;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* See the comments for SKIP_SOLIB_RESOLVER at the top of infrun.c.
+ This function:
+ 1) decides whether a PLT has sent us into the linker to resolve
+ a function reference, and
+ 2) if so, tells us where to set a temporary breakpoint that will
+ trigger when the dynamic linker is done. */
+
+CORE_ADDR
+glibc_skip_solib_resolver (CORE_ADDR pc)
+{
+ /* The GNU dynamic linker is part of the GNU C library, and is used
+ by all GNU systems (GNU/Hurd, GNU/Linux). An unresolved PLT
+ entry points to "_dl_runtime_resolve", which calls "fixup" to
+ patch the PLT, and then passes control to the function.
+
+ We look for the symbol `_dl_runtime_resolve', and find `fixup' in
+ the same objfile. If we are at the entry point of `fixup', then
+ we set a breakpoint at the return address (at the top of the
+ stack), and continue.
+
+ It's kind of gross to do all these checks every time we're
+ called, since they don't change once the executable has gotten
+ started. But this is only a temporary hack --- upcoming versions
+ of GNU/Linux will provide a portable, efficient interface for
+ debugging programs that use shared libraries. */
+
+ struct objfile *objfile;
+ struct minimal_symbol *resolver
+ = find_minsym_and_objfile ("_dl_runtime_resolve", &objfile);
+
+ if (resolver)
+ {
+ struct minimal_symbol *fixup
+ = lookup_minimal_symbol ("fixup", NULL, objfile);
+
+ if (fixup && SYMBOL_VALUE_ADDRESS (fixup) == pc)
+ return frame_pc_unwind (get_current_frame ());
+ }
+
+ return 0;
+}
--- /dev/null
+/* Target-dependent code for the GNU C Library (glibc).
+
+ Copyright 2002, 2003 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 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. */
+
+#ifndef GLIBC_TDEP_H
+#define GLIBC_TDEP_H
+
+extern CORE_ADDR glibc_skip_solib_resolver (CORE_ADDR);
+
+#endif /* glibc-tdep.h */
projects / binutils-gdb.git / commitdiff