/* Read ELF (Executable and Linking Format) object files for GDB.
- Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 1991-2012 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
#include "demangle.h"
#include "psympriv.h"
#include "filenames.h"
+#include "probe.h"
+#include "arch-utils.h"
#include "gdbtypes.h"
#include "value.h"
#include "infcall.h"
#include "gdbthread.h"
#include "regcache.h"
+#include "bcache.h"
extern void _initialize_elfread (void);
asection *mdebugsect; /* Section pointer for .mdebug section */
};
+/* Per-objfile data for probe info. */
+
+static const struct objfile_data *probe_key = NULL;
+
static void free_elfinfo (void *);
/* Minimal symbols located at the GOT entries for .plt - that is the real
binaries are not relocatable. */
if (bfd_get_section_size (sect) > 0 && j == num_segments
&& (bfd_get_section_flags (abfd, sect) & SEC_LOAD) != 0)
- warning (_("Loadable segment \"%s\" outside of ELF segments"),
+ warning (_("Loadable section \"%s\" outside of ELF segments"),
bfd_section_name (abfd, sect));
}
seen any section info for it yet. */
asymbol *filesym = 0;
/* Name of filesym. This is either a constant string or is saved on
- the objfile's obstack. */
- char *filesymname = "";
+ the objfile's filename cache. */
+ const char *filesymname = "";
struct dbx_symfile_info *dbx = objfile->deprecated_sym_stab_info;
int stripped = (bfd_get_symcount (objfile->obfd) == 0);
if (!sect)
continue;
+ /* On ia64-hpux, we have discovered that the system linker
+ adds undefined symbols with nonzero addresses that cannot
+ be right (their address points inside the code of another
+ function in the .text section). This creates problems
+ when trying to determine which symbol corresponds to
+ a given address.
+
+ We try to detect those buggy symbols by checking which
+ section we think they correspond to. Normally, PLT symbols
+ are stored inside their own section, and the typical name
+ for that section is ".plt". So, if there is a ".plt"
+ section, and yet the section name of our symbol does not
+ start with ".plt", we ignore that symbol. */
+ if (strncmp (sect->name, ".plt", 4) != 0
+ && bfd_get_section_by_name (abfd, ".plt") != NULL)
+ continue;
+
symaddr += ANOFFSET (objfile->section_offsets, sect->index);
msym = record_minimal_symbol
sectinfo = NULL;
}
filesym = sym;
- filesymname =
- obsavestring ((char *) filesym->name, strlen (filesym->name),
- &objfile->objfile_obstack);
+ filesymname = bcache (filesym->name, strlen (filesym->name) + 1,
+ objfile->filename_cache);
}
else if (sym->flags & BSF_SECTION_SYM)
continue;
static CORE_ADDR
elf_gnu_ifunc_resolve_addr (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- char *name_at_pc;
+ const char *name_at_pc;
CORE_ADDR start_at_pc, address;
struct type *func_func_type = builtin_type (gdbarch)->builtin_func_func;
struct value *function, *address_val;
prev_frame_id,
bp_gnu_ifunc_resolver_return);
+ /* set_momentary_breakpoint invalidates PREV_FRAME. */
+ prev_frame = NULL;
+
/* Add new b_return to the ring list b->related_breakpoint. */
gdb_assert (b_return->related_breakpoint == b_return);
b_return->related_breakpoint = b->related_breakpoint;
build_id_to_debug_filename (struct build_id *build_id)
{
char *link, *debugdir, *retval = NULL;
+ VEC (char_ptr) *debugdir_vec;
+ struct cleanup *back_to;
+ int ix;
/* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
link = alloca (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1
/* Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
cause "/.build-id/..." lookups. */
- debugdir = debug_file_directory;
- do
+ debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory);
+ back_to = make_cleanup_free_char_ptr_vec (debugdir_vec);
+
+ for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix)
{
- char *s, *debugdir_end;
+ size_t debugdir_len = strlen (debugdir);
gdb_byte *data = build_id->data;
size_t size = build_id->size;
+ char *s;
- while (*debugdir == DIRNAME_SEPARATOR)
- debugdir++;
-
- debugdir_end = strchr (debugdir, DIRNAME_SEPARATOR);
- if (debugdir_end == NULL)
- debugdir_end = &debugdir[strlen (debugdir)];
-
- memcpy (link, debugdir, debugdir_end - debugdir);
- s = &link[debugdir_end - debugdir];
+ memcpy (link, debugdir, debugdir_len);
+ s = &link[debugdir_len];
s += sprintf (s, "/.build-id/");
if (size > 0)
{
if (retval != NULL)
break;
-
- debugdir = debugdir_end;
}
- while (*debugdir != 0);
+ do_cleanups (back_to);
return retval;
}
complaint (&symfile_complaints,
_("elf/stab section information missing for %s"), filename);
}
+
+/* Implementation of `sym_get_probes', as documented in symfile.h. */
+
+static VEC (probe_p) *
+elf_get_probes (struct objfile *objfile)
+{
+ VEC (probe_p) *probes_per_objfile;
+
+ /* Have we parsed this objfile's probes already? */
+ probes_per_objfile = objfile_data (objfile, probe_key);
+
+ if (!probes_per_objfile)
+ {
+ int ix;
+ const struct probe_ops *probe_ops;
+
+ /* Here we try to gather information about all types of probes from the
+ objfile. */
+ for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, probe_ops);
+ ix++)
+ probe_ops->get_probes (&probes_per_objfile, objfile);
+
+ if (probes_per_objfile == NULL)
+ {
+ VEC_reserve (probe_p, probes_per_objfile, 1);
+ gdb_assert (probes_per_objfile != NULL);
+ }
+
+ set_objfile_data (objfile, probe_key, probes_per_objfile);
+ }
+
+ return probes_per_objfile;
+}
+
+/* Implementation of `sym_get_probe_argument_count', as documented in
+ symfile.h. */
+
+static unsigned
+elf_get_probe_argument_count (struct objfile *objfile,
+ struct probe *probe)
+{
+ return probe->pops->get_probe_argument_count (probe, objfile);
+}
+
+/* Implementation of `sym_evaluate_probe_argument', as documented in
+ symfile.h. */
+
+static struct value *
+elf_evaluate_probe_argument (struct objfile *objfile,
+ struct probe *probe,
+ unsigned n)
+{
+ return probe->pops->evaluate_probe_argument (probe, objfile, n);
+}
+
+/* Implementation of `sym_compile_to_ax', as documented in symfile.h. */
+
+static void
+elf_compile_to_ax (struct objfile *objfile,
+ struct probe *probe,
+ struct agent_expr *expr,
+ struct axs_value *value,
+ unsigned n)
+{
+ probe->pops->compile_to_ax (probe, objfile, expr, value, n);
+}
+
+/* Implementation of `sym_relocate_probe', as documented in symfile.h. */
+
+static void
+elf_symfile_relocate_probe (struct objfile *objfile,
+ struct section_offsets *new_offsets,
+ struct section_offsets *delta)
+{
+ int ix;
+ VEC (probe_p) *probes = objfile_data (objfile, probe_key);
+ struct probe *probe;
+
+ for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
+ probe->pops->relocate (probe, ANOFFSET (delta, SECT_OFF_TEXT (objfile)));
+}
+
+/* Helper function used to free the space allocated for storing SystemTap
+ probe information. */
+
+static void
+probe_key_free (struct objfile *objfile, void *d)
+{
+ int ix;
+ VEC (probe_p) *probes = d;
+ struct probe *probe;
+
+ for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
+ probe->pops->destroy (probe);
+
+ VEC_free (probe_p, probes);
+}
+
\f
+
+/* Implementation `sym_probe_fns', as documented in symfile.h. */
+
+static const struct sym_probe_fns elf_probe_fns =
+{
+ elf_get_probes, /* sym_get_probes */
+ elf_get_probe_argument_count, /* sym_get_probe_argument_count */
+ elf_evaluate_probe_argument, /* sym_evaluate_probe_argument */
+ elf_compile_to_ax, /* sym_compile_to_ax */
+ elf_symfile_relocate_probe, /* sym_relocate_probe */
+};
+
/* Register that we are able to handle ELF object file formats. */
static const struct sym_fns elf_sym_fns =
elf_symfile_segments, /* Get segment information from a file. */
NULL,
default_symfile_relocate, /* Relocate a debug section. */
+ &elf_probe_fns, /* sym_probe_fns */
&psym_functions
};
elf_symfile_segments, /* Get segment information from a file. */
NULL,
default_symfile_relocate, /* Relocate a debug section. */
+ &elf_probe_fns, /* sym_probe_fns */
&psym_functions
};
elf_symfile_segments, /* Get segment information from a file. */
NULL,
default_symfile_relocate, /* Relocate a debug section. */
+ &elf_probe_fns, /* sym_probe_fns */
&dwarf2_gdb_index_functions
};
void
_initialize_elfread (void)
{
+ probe_key = register_objfile_data_with_cleanup (NULL, probe_key_free);
add_symtab_fns (&elf_sym_fns);
elf_objfile_gnu_ifunc_cache_data = register_objfile_data ();
projects / deliverable / binutils-gdb.git / blobdiff