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old-cross-binutils/gdb/compile/compile-object-load.c
Jan Kratochvil d976bace1c compile: Fix uninitialized variable compiler warnings 
gdb/ChangeLog
2015-05-16  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* compile/compile-object-load.c (get_out_value_type): Fix uninitialized
	variable compiler warnings.
2015-05-16 16:37:47 +02:00

763 lines
25 KiB
C
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/* Load module for 'compile' command.
Copyright (C) 2014-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "compile-object-load.h"
#include "compile-internal.h"
#include "command.h"
#include "objfiles.h"
#include "gdbcore.h"
#include "readline/tilde.h"
#include "bfdlink.h"
#include "gdbcmd.h"
#include "regcache.h"
#include "inferior.h"
#include "compile.h"
#include "block.h"
#include "arch-utils.h"
/* Helper data for setup_sections. */
struct setup_sections_data
{
/* Size of all recent sections with matching LAST_PROT. */
CORE_ADDR last_size;
/* First section matching LAST_PROT. */
asection *last_section_first;
/* Memory protection like the prot parameter of gdbarch_infcall_mmap. */
unsigned last_prot;
/* Maximum of alignments of all sections matching LAST_PROT.
This value is always at least 1. This value is always a power of 2. */
CORE_ADDR last_max_alignment;
};
/* Place all ABFD sections next to each other obeying all constraints. */
static void
setup_sections (bfd *abfd, asection *sect, void *data_voidp)
{
struct setup_sections_data *data = data_voidp;
CORE_ADDR alignment;
unsigned prot;
if (sect != NULL)
{
/* It is required by later bfd_get_relocated_section_contents. */
if (sect->output_section == NULL)
sect->output_section = sect;
if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
return;
/* Make the memory always readable. */
prot = GDB_MMAP_PROT_READ;
if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0)
prot |= GDB_MMAP_PROT_WRITE;
if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0)
prot |= GDB_MMAP_PROT_EXEC;
if (compile_debug)
fprintf_unfiltered (gdb_stdout,
"module \"%s\" section \"%s\" size %s prot %u\n",
bfd_get_filename (abfd),
bfd_get_section_name (abfd, sect),
paddress (target_gdbarch (),
bfd_get_section_size (sect)),
prot);
}
else
prot = -1;
if (sect == NULL
|| (data->last_prot != prot && bfd_get_section_size (sect) != 0))
{
CORE_ADDR addr;
asection *sect_iter;
if (data->last_size != 0)
{
addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size,
data->last_prot);
if (compile_debug)
fprintf_unfiltered (gdb_stdout,
"allocated %s bytes at %s prot %u\n",
paddress (target_gdbarch (), data->last_size),
paddress (target_gdbarch (), addr),
data->last_prot);
}
else
addr = 0;
if ((addr & (data->last_max_alignment - 1)) != 0)
error (_("Inferior compiled module address %s "
"is not aligned to BFD required %s."),
paddress (target_gdbarch (), addr),
paddress (target_gdbarch (), data->last_max_alignment));
for (sect_iter = data->last_section_first; sect_iter != sect;
sect_iter = sect_iter->next)
if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0)
bfd_set_section_vma (abfd, sect_iter,
addr + bfd_get_section_vma (abfd, sect_iter));
data->last_size = 0;
data->last_section_first = sect;
data->last_prot = prot;
data->last_max_alignment = 1;
}
if (sect == NULL)
return;
alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect);
data->last_max_alignment = max (data->last_max_alignment, alignment);
data->last_size = (data->last_size + alignment - 1) & -alignment;
bfd_set_section_vma (abfd, sect, data->last_size);
data->last_size += bfd_get_section_size (sect);
data->last_size = (data->last_size + alignment - 1) & -alignment;
}
/* Helper for link_callbacks callbacks vector. */
static bfd_boolean
link_callbacks_multiple_definition (struct bfd_link_info *link_info,
struct bfd_link_hash_entry *h, bfd *nbfd,
asection *nsec, bfd_vma nval)
{
bfd *abfd = link_info->input_bfds;
if (link_info->allow_multiple_definition)
return TRUE;
warning (_("Compiled module \"%s\": multiple symbol definitions: %s"),
bfd_get_filename (abfd), h->root.string);
return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
static bfd_boolean
link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning,
const char *symbol, bfd *abfd, asection *section,
bfd_vma address)
{
warning (_("Compiled module \"%s\" section \"%s\": warning: %s"),
bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
xwarning);
/* Maybe permit running as a module? */
return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
static bfd_boolean
link_callbacks_undefined_symbol (struct bfd_link_info *link_info,
const char *name, bfd *abfd, asection *section,
bfd_vma address, bfd_boolean is_fatal)
{
warning (_("Cannot resolve relocation to \"%s\" "
"from compiled module \"%s\" section \"%s\"."),
name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
static bfd_boolean
link_callbacks_reloc_overflow (struct bfd_link_info *link_info,
struct bfd_link_hash_entry *entry,
const char *name, const char *reloc_name,
bfd_vma addend, bfd *abfd, asection *section,
bfd_vma address)
{
/* TRUE is required for intra-module relocations. */
return TRUE;
}
/* Helper for link_callbacks callbacks vector. */
static bfd_boolean
link_callbacks_reloc_dangerous (struct bfd_link_info *link_info,
const char *message, bfd *abfd,
asection *section, bfd_vma address)
{
warning (_("Compiled module \"%s\" section \"%s\": dangerous "
"relocation: %s\n"),
bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
message);
return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
static bfd_boolean
link_callbacks_unattached_reloc (struct bfd_link_info *link_info,
const char *name, bfd *abfd, asection *section,
bfd_vma address)
{
warning (_("Compiled module \"%s\" section \"%s\": unattached "
"relocation: %s\n"),
bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
name);
return FALSE;
}
/* Helper for link_callbacks callbacks vector. */
static void link_callbacks_einfo (const char *fmt, ...)
ATTRIBUTE_PRINTF (1, 2);
static void
link_callbacks_einfo (const char *fmt, ...)
{
struct cleanup *cleanups;
va_list ap;
char *str;
va_start (ap, fmt);
str = xstrvprintf (fmt, ap);
va_end (ap);
cleanups = make_cleanup (xfree, str);
warning (_("Compile module: warning: %s"), str);
do_cleanups (cleanups);
}
/* Helper for bfd_get_relocated_section_contents.
Only these symbols are set by bfd_simple_get_relocated_section_contents
but bfd/ seems to use even the NULL ones without checking them first. */
static const struct bfd_link_callbacks link_callbacks =
{
NULL, /* add_archive_element */
link_callbacks_multiple_definition, /* multiple_definition */
NULL, /* multiple_common */
NULL, /* add_to_set */
NULL, /* constructor */
link_callbacks_warning, /* warning */
link_callbacks_undefined_symbol, /* undefined_symbol */
link_callbacks_reloc_overflow, /* reloc_overflow */
link_callbacks_reloc_dangerous, /* reloc_dangerous */
link_callbacks_unattached_reloc, /* unattached_reloc */
NULL, /* notice */
link_callbacks_einfo, /* einfo */
NULL, /* info */
NULL, /* minfo */
NULL, /* override_segment_assignment */
};
struct link_hash_table_cleanup_data
{
bfd *abfd;
bfd *link_next;
};
/* Cleanup callback for struct bfd_link_info. */
static void
link_hash_table_free (void *d)
{
struct link_hash_table_cleanup_data *data = d;
if (data->abfd->is_linker_output)
(*data->abfd->link.hash->hash_table_free) (data->abfd);
data->abfd->link.next = data->link_next;
}
/* Relocate and store into inferior memory each section SECT of ABFD. */
static void
copy_sections (bfd *abfd, asection *sect, void *data)
{
asymbol **symbol_table = data;
bfd_byte *sect_data, *sect_data_got;
struct cleanup *cleanups;
struct bfd_link_info link_info;
struct bfd_link_order link_order;
CORE_ADDR inferior_addr;
struct link_hash_table_cleanup_data cleanup_data;
if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD))
!= (SEC_ALLOC | SEC_LOAD))
return;
if (bfd_get_section_size (sect) == 0)
return;
/* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB
cannot use as it does not report relocations to undefined symbols. */
memset (&link_info, 0, sizeof (link_info));
link_info.output_bfd = abfd;
link_info.input_bfds = abfd;
link_info.input_bfds_tail = &abfd->link.next;
cleanup_data.abfd = abfd;
cleanup_data.link_next = abfd->link.next;
abfd->link.next = NULL;
link_info.hash = bfd_link_hash_table_create (abfd);
cleanups = make_cleanup (link_hash_table_free, &cleanup_data);
link_info.callbacks = &link_callbacks;
memset (&link_order, 0, sizeof (link_order));
link_order.next = NULL;
link_order.type = bfd_indirect_link_order;
link_order.offset = 0;
link_order.size = bfd_get_section_size (sect);
link_order.u.indirect.section = sect;
sect_data = xmalloc (bfd_get_section_size (sect));
make_cleanup (xfree, sect_data);
sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info,
&link_order, sect_data,
FALSE, symbol_table);
if (sect_data_got == NULL)
error (_("Cannot map compiled module \"%s\" section \"%s\": %s"),
bfd_get_filename (abfd), bfd_get_section_name (abfd, sect),
bfd_errmsg (bfd_get_error ()));
gdb_assert (sect_data_got == sect_data);
inferior_addr = bfd_get_section_vma (abfd, sect);
if (0 != target_write_memory (inferior_addr, sect_data,
bfd_get_section_size (sect)))
error (_("Cannot write compiled module \"%s\" section \"%s\" "
"to inferior memory range %s-%s."),
bfd_get_filename (abfd), bfd_get_section_name (abfd, sect),
paddress (target_gdbarch (), inferior_addr),
paddress (target_gdbarch (),
inferior_addr + bfd_get_section_size (sect)));
do_cleanups (cleanups);
}
/* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL
symbols in OBJFILE so we can calculate how much memory to allocate
for the out parameter. This avoids needing a malloc in the generated
code. Throw an error if anything fails.
GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE.
If it finds user tries to print an array type this function returns
NULL. Caller will then regenerate the code with
COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it.
This is because __auto_type array-to-pointer type conversion of
COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE
preserving the array type. */
static struct type *
get_out_value_type (struct symbol *func_sym, struct objfile *objfile,
enum compile_i_scope_types scope)
{
struct symbol *gdb_ptr_type_sym;
/* Initialize it just to avoid a GCC false warning. */
struct symbol *gdb_val_sym = NULL;
struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval;
/* Initialize it just to avoid a GCC false warning. */
const struct block *block = NULL;
const struct blockvector *bv;
int nblocks = 0;
int block_loop = 0;
bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab);
nblocks = BLOCKVECTOR_NBLOCKS (bv);
gdb_ptr_type_sym = NULL;
for (block_loop = 0; block_loop < nblocks; block_loop++)
{
struct symbol *function = NULL;
const struct block *function_block;
block = BLOCKVECTOR_BLOCK (bv, block_loop);
if (BLOCK_FUNCTION (block) != NULL)
continue;
gdb_val_sym = block_lookup_symbol (block, COMPILE_I_EXPR_VAL, VAR_DOMAIN);
if (gdb_val_sym == NULL)
continue;
function_block = block;
while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)
&& function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
{
function_block = BLOCK_SUPERBLOCK (function_block);
function = BLOCK_FUNCTION (function_block);
if (function != NULL)
break;
}
if (function != NULL
&& (BLOCK_SUPERBLOCK (function_block)
== BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))
&& (strcmp (SYMBOL_LINKAGE_NAME (function), GCC_FE_WRAPPER_FUNCTION)
== 0))
break;
}
if (block_loop == nblocks)
error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
gdb_type = SYMBOL_TYPE (gdb_val_sym);
CHECK_TYPEDEF (gdb_type);
gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE,
VAR_DOMAIN);
if (gdb_ptr_type_sym == NULL)
error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym);
CHECK_TYPEDEF (gdb_ptr_type);
if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR)
error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE);
gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_ptr_type);
if (types_deeply_equal (gdb_type, gdb_type_from_ptr))
{
if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE)
error (_("Expected address scope in compiled module \"%s\"."),
objfile_name (objfile));
return gdb_type;
}
if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR)
error (_("Invalid type code %d of symbol \"%s\" "
"in compiled module \"%s\"."),
TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL,
objfile_name (objfile));
retval = gdb_type_from_ptr;
switch (TYPE_CODE (gdb_type_from_ptr))
{
case TYPE_CODE_ARRAY:
gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr);
break;
case TYPE_CODE_FUNC:
break;
default:
error (_("Invalid type code %d of symbol \"%s\" "
"in compiled module \"%s\"."),
TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE,
objfile_name (objfile));
}
if (!types_deeply_equal (gdb_type_from_ptr,
TYPE_TARGET_TYPE (gdb_type)))
error (_("Referenced types do not match for symbols \"%s\" and \"%s\" "
"in compiled module \"%s\"."),
COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL,
objfile_name (objfile));
if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE)
return NULL;
return retval;
}
/* Fetch the type of first parameter of FUNC_SYM.
Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */
static struct type *
get_regs_type (struct symbol *func_sym, struct objfile *objfile)
{
struct type *func_type = SYMBOL_TYPE (func_sym);
struct type *regsp_type, *regs_type;
/* No register parameter present. */
if (TYPE_NFIELDS (func_type) == 0)
return NULL;
regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0));
if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR)
error (_("Invalid type code %d of first parameter of function \"%s\" "
"in compiled module \"%s\"."),
TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION,
objfile_name (objfile));
regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type));
if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT)
error (_("Invalid type code %d of dereferenced first parameter "
"of function \"%s\" in compiled module \"%s\"."),
TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION,
objfile_name (objfile));
return regs_type;
}
/* Store all inferior registers required by REGS_TYPE to inferior memory
starting at inferior address REGS_BASE. */
static void
store_regs (struct type *regs_type, CORE_ADDR regs_base)
{
struct gdbarch *gdbarch = target_gdbarch ();
struct regcache *regcache = get_thread_regcache (inferior_ptid);
int fieldno;
for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++)
{
const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno);
ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno);
ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno);
ULONGEST reg_offset;
struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type,
fieldno));
ULONGEST reg_size = TYPE_LENGTH (reg_type);
int regnum;
struct value *regval;
CORE_ADDR inferior_addr;
if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0)
continue;
if ((reg_bitpos % 8) != 0 || reg_bitsize != 0)
error (_("Invalid register \"%s\" position %s bits or size %s bits"),
reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize));
reg_offset = reg_bitpos / 8;
if (TYPE_CODE (reg_type) != TYPE_CODE_INT
&& TYPE_CODE (reg_type) != TYPE_CODE_PTR)
error (_("Invalid register \"%s\" type code %d"), reg_name,
TYPE_CODE (reg_type));
regnum = compile_register_name_demangle (gdbarch, reg_name);
regval = value_from_register (reg_type, regnum, get_current_frame ());
if (value_optimized_out (regval))
error (_("Register \"%s\" is optimized out."), reg_name);
if (!value_entirely_available (regval))
error (_("Register \"%s\" is not available."), reg_name);
inferior_addr = regs_base + reg_offset;
if (0 != target_write_memory (inferior_addr, value_contents (regval),
reg_size))
error (_("Cannot write register \"%s\" to inferior memory at %s."),
reg_name, paddress (gdbarch, inferior_addr));
}
}
/* Load OBJECT_FILE into inferior memory. Throw an error otherwise.
Caller must fully dispose the return value by calling compile_object_run.
SOURCE_FILE's copy is stored into the returned object.
Caller should free both OBJECT_FILE and SOURCE_FILE immediatelly after this
function returns.
Function returns NULL only for COMPILE_I_PRINT_ADDRESS_SCOPE when
COMPILE_I_PRINT_VALUE_SCOPE should have been used instead. */
struct compile_module *
compile_object_load (const char *object_file, const char *source_file,
enum compile_i_scope_types scope, void *scope_data)
{
struct cleanup *cleanups, *cleanups_free_objfile;
bfd *abfd;
struct setup_sections_data setup_sections_data;
CORE_ADDR addr, regs_addr, out_value_addr = 0;
struct symbol *func_sym;
struct type *func_type;
struct bound_minimal_symbol bmsym;
long storage_needed;
asymbol **symbol_table, **symp;
long number_of_symbols, missing_symbols;
struct type *dptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
unsigned dptr_type_len = TYPE_LENGTH (dptr_type);
struct compile_module *retval;
struct type *regs_type, *out_value_type = NULL;
char *filename, **matching;
struct objfile *objfile;
int expect_parameters;
struct type *expect_return_type;
filename = tilde_expand (object_file);
cleanups = make_cleanup (xfree, filename);
abfd = gdb_bfd_open (filename, gnutarget, -1);
if (abfd == NULL)
error (_("\"%s\": could not open as compiled module: %s"),
filename, bfd_errmsg (bfd_get_error ()));
make_cleanup_bfd_unref (abfd);
if (!bfd_check_format_matches (abfd, bfd_object, &matching))
error (_("\"%s\": not in loadable format: %s"),
filename, gdb_bfd_errmsg (bfd_get_error (), matching));
if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) != 0)
error (_("\"%s\": not in object format."), filename);
setup_sections_data.last_size = 0;
setup_sections_data.last_section_first = abfd->sections;
setup_sections_data.last_prot = -1;
setup_sections_data.last_max_alignment = 1;
bfd_map_over_sections (abfd, setup_sections, &setup_sections_data);
setup_sections (abfd, NULL, &setup_sections_data);
storage_needed = bfd_get_symtab_upper_bound (abfd);
if (storage_needed < 0)
error (_("Cannot read symbols of compiled module \"%s\": %s"),
filename, bfd_errmsg (bfd_get_error ()));
/* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in
"Reading symbols from ..." message for automatically generated file. */
objfile = symbol_file_add_from_bfd (abfd, filename, 0, NULL, 0, NULL);
cleanups_free_objfile = make_cleanup_free_objfile (objfile);
func_sym = lookup_global_symbol_from_objfile (objfile,
GCC_FE_WRAPPER_FUNCTION,
VAR_DOMAIN);
if (func_sym == NULL)
error (_("Cannot find function \"%s\" in compiled module \"%s\"."),
GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile));
func_type = SYMBOL_TYPE (func_sym);
if (TYPE_CODE (func_type) != TYPE_CODE_FUNC)
error (_("Invalid type code %d of function \"%s\" in compiled "
"module \"%s\"."),
TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION,
objfile_name (objfile));
switch (scope)
{
case COMPILE_I_SIMPLE_SCOPE:
expect_parameters = 1;
expect_return_type = builtin_type (target_gdbarch ())->builtin_void;
break;
case COMPILE_I_RAW_SCOPE:
expect_parameters = 0;
expect_return_type = builtin_type (target_gdbarch ())->builtin_void;
break;
case COMPILE_I_PRINT_ADDRESS_SCOPE:
case COMPILE_I_PRINT_VALUE_SCOPE:
expect_parameters = 2;
expect_return_type = builtin_type (target_gdbarch ())->builtin_void;
break;
default:
internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope);
}
if (TYPE_NFIELDS (func_type) != expect_parameters)
error (_("Invalid %d parameters of function \"%s\" in compiled "
"module \"%s\"."),
TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION,
objfile_name (objfile));
if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type)))
error (_("Invalid return type of function \"%s\" in compiled "
"module \"%s\"."),
GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile));
/* The memory may be later needed
by bfd_generic_get_relocated_section_contents
called from default_symfile_relocate. */
symbol_table = obstack_alloc (&objfile->objfile_obstack, storage_needed);
number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
if (number_of_symbols < 0)
error (_("Cannot parse symbols of compiled module \"%s\": %s"),
filename, bfd_errmsg (bfd_get_error ()));
missing_symbols = 0;
for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++)
{
asymbol *sym = *symp;
if (sym->flags != 0)
continue;
if (compile_debug)
fprintf_unfiltered (gdb_stdout,
"lookup undefined ELF symbol \"%s\"\n",
sym->name);
sym->flags = BSF_GLOBAL;
sym->section = bfd_abs_section_ptr;
if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0)
{
sym->value = 0;
continue;
}
bmsym = lookup_minimal_symbol (sym->name, NULL, NULL);
switch (bmsym.minsym == NULL
? mst_unknown : MSYMBOL_TYPE (bmsym.minsym))
{
case mst_text:
sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym);
break;
case mst_text_gnu_ifunc:
sym->value = gnu_ifunc_resolve_addr (target_gdbarch (),
BMSYMBOL_VALUE_ADDRESS (bmsym));
break;
default:
warning (_("Could not find symbol \"%s\" "
"for compiled module \"%s\"."),
sym->name, filename);
missing_symbols++;
}
}
if (missing_symbols)
error (_("%ld symbols were missing, cannot continue."), missing_symbols);
bfd_map_over_sections (abfd, copy_sections, symbol_table);
regs_type = get_regs_type (func_sym, objfile);
if (regs_type == NULL)
regs_addr = 0;
else
{
/* Use read-only non-executable memory protection. */
regs_addr = gdbarch_infcall_mmap (target_gdbarch (),
TYPE_LENGTH (regs_type),
GDB_MMAP_PROT_READ);
gdb_assert (regs_addr != 0);
if (compile_debug)
fprintf_unfiltered (gdb_stdout,
"allocated %s bytes at %s for registers\n",
paddress (target_gdbarch (),
TYPE_LENGTH (regs_type)),
paddress (target_gdbarch (), regs_addr));
store_regs (regs_type, regs_addr);
}
if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE
|| scope == COMPILE_I_PRINT_VALUE_SCOPE)
{
out_value_type = get_out_value_type (func_sym, objfile, scope);
if (out_value_type == NULL)
{
do_cleanups (cleanups);
return NULL;
}
check_typedef (out_value_type);
out_value_addr = gdbarch_infcall_mmap (target_gdbarch (),
TYPE_LENGTH (out_value_type),
(GDB_MMAP_PROT_READ
| GDB_MMAP_PROT_WRITE));
gdb_assert (out_value_addr != 0);
if (compile_debug)
fprintf_unfiltered (gdb_stdout,
"allocated %s bytes at %s for printed value\n",
paddress (target_gdbarch (),
TYPE_LENGTH (out_value_type)),
paddress (target_gdbarch (), out_value_addr));
}
discard_cleanups (cleanups_free_objfile);
do_cleanups (cleanups);
retval = xmalloc (sizeof (*retval));
retval->objfile = objfile;
retval->source_file = xstrdup (source_file);
retval->func_sym = func_sym;
retval->regs_addr = regs_addr;
retval->scope = scope;
retval->scope_data = scope_data;
retval->out_value_type = out_value_type;
retval->out_value_addr = out_value_addr;
return retval;
}
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